6186 lines
147 KiB
C
6186 lines
147 KiB
C
/* toke.c
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*
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* Copyright (c) 1991-1999, Larry Wall
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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*/
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/*
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* "It all comes from here, the stench and the peril." --Frodo
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*/
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#include "EXTERN.h"
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#include "perl.h"
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#ifndef PERL_OBJECT
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static void check_uni _((void));
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static void force_next _((I32 type));
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static char *force_version _((char *start));
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static char *force_word _((char *start, int token, int check_keyword, int allow_pack, int allow_tick));
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static SV *tokeq _((SV *sv));
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static char *scan_const _((char *start));
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static char *scan_formline _((char *s));
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static char *scan_heredoc _((char *s));
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static char *scan_ident _((char *s, char *send, char *dest, STRLEN destlen,
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I32 ck_uni));
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static char *scan_inputsymbol _((char *start));
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static char *scan_pat _((char *start, I32 type));
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static char *scan_str _((char *start));
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static char *scan_subst _((char *start));
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static char *scan_trans _((char *start));
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static char *scan_word _((char *s, char *dest, STRLEN destlen,
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int allow_package, STRLEN *slp));
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static char *skipspace _((char *s));
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static void checkcomma _((char *s, char *name, char *what));
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static void force_ident _((char *s, int kind));
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static void incline _((char *s));
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static int intuit_method _((char *s, GV *gv));
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static int intuit_more _((char *s));
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static I32 lop _((I32 f, expectation x, char *s));
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static void missingterm _((char *s));
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static void no_op _((char *what, char *s));
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static void set_csh _((void));
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static I32 sublex_done _((void));
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static I32 sublex_push _((void));
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static I32 sublex_start _((void));
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#ifdef CRIPPLED_CC
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static int uni _((I32 f, char *s));
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#endif
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static char * filter_gets _((SV *sv, PerlIO *fp, STRLEN append));
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static void restore_rsfp _((void *f));
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static SV *new_constant _((char *s, STRLEN len, char *key, SV *sv, SV *pv, char *type));
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static void restore_expect _((void *e));
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static void restore_lex_expect _((void *e));
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static char *PL_super_bufptr;
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static char *PL_super_bufend;
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#endif /* PERL_OBJECT */
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static char ident_too_long[] = "Identifier too long";
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/* The following are arranged oddly so that the guard on the switch statement
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* can get by with a single comparison (if the compiler is smart enough).
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*/
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/* #define LEX_NOTPARSING 11 is done in perl.h. */
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#define LEX_NORMAL 10
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#define LEX_INTERPNORMAL 9
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#define LEX_INTERPCASEMOD 8
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#define LEX_INTERPPUSH 7
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#define LEX_INTERPSTART 6
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#define LEX_INTERPEND 5
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#define LEX_INTERPENDMAYBE 4
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#define LEX_INTERPCONCAT 3
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#define LEX_INTERPCONST 2
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#define LEX_FORMLINE 1
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#define LEX_KNOWNEXT 0
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#ifdef I_FCNTL
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#include <fcntl.h>
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#endif
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#ifdef I_SYS_FILE
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#include <sys/file.h>
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#endif
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/* XXX If this causes problems, set i_unistd=undef in the hint file. */
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#ifdef I_UNISTD
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# include <unistd.h> /* Needed for execv() */
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#endif
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#ifdef ff_next
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#undef ff_next
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#endif
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#include "keywords.h"
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#ifdef CLINE
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#undef CLINE
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#endif
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#define CLINE (PL_copline = (PL_curcop->cop_line < PL_copline ? PL_curcop->cop_line : PL_copline))
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#define TOKEN(retval) return (PL_bufptr = s,(int)retval)
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#define OPERATOR(retval) return (PL_expect = XTERM,PL_bufptr = s,(int)retval)
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#define AOPERATOR(retval) return ao((PL_expect = XTERM,PL_bufptr = s,(int)retval))
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#define PREBLOCK(retval) return (PL_expect = XBLOCK,PL_bufptr = s,(int)retval)
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#define PRETERMBLOCK(retval) return (PL_expect = XTERMBLOCK,PL_bufptr = s,(int)retval)
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#define PREREF(retval) return (PL_expect = XREF,PL_bufptr = s,(int)retval)
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#define TERM(retval) return (CLINE, PL_expect = XOPERATOR,PL_bufptr = s,(int)retval)
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#define LOOPX(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LOOPEX)
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#define FTST(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)UNIOP)
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#define FUN0(f) return(yylval.ival = f,PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC0)
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#define FUN1(f) return(yylval.ival = f,PL_expect = XOPERATOR,PL_bufptr = s,(int)FUNC1)
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#define BOop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)BITOROP))
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#define BAop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)BITANDOP))
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#define SHop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)SHIFTOP))
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#define PWop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)POWOP))
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#define PMop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)MATCHOP)
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#define Aop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)ADDOP))
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#define Mop(f) return ao((yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)MULOP))
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#define Eop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)EQOP)
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#define Rop(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)RELOP)
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/* This bit of chicanery makes a unary function followed by
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* a parenthesis into a function with one argument, highest precedence.
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*/
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#define UNI(f) return(yylval.ival = f, \
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PL_expect = XTERM, \
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PL_bufptr = s, \
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PL_last_uni = PL_oldbufptr, \
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PL_last_lop_op = f, \
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(*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
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#define UNIBRACK(f) return(yylval.ival = f, \
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PL_bufptr = s, \
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PL_last_uni = PL_oldbufptr, \
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(*s == '(' || (s = skipspace(s), *s == '(') ? (int)FUNC1 : (int)UNIOP) )
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/* grandfather return to old style */
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#define OLDLOP(f) return(yylval.ival=f,PL_expect = XTERM,PL_bufptr = s,(int)LSTOP)
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STATIC int
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ao(int toketype)
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{
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if (*PL_bufptr == '=') {
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PL_bufptr++;
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if (toketype == ANDAND)
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yylval.ival = OP_ANDASSIGN;
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else if (toketype == OROR)
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yylval.ival = OP_ORASSIGN;
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toketype = ASSIGNOP;
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}
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return toketype;
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}
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STATIC void
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no_op(char *what, char *s)
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{
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char *oldbp = PL_bufptr;
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bool is_first = (PL_oldbufptr == PL_linestart);
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PL_bufptr = s;
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yywarn(form("%s found where operator expected", what));
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if (is_first)
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warn("\t(Missing semicolon on previous line?)\n");
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else if (PL_oldoldbufptr && isIDFIRST(*PL_oldoldbufptr)) {
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char *t;
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for (t = PL_oldoldbufptr; *t && (isALNUM(*t) || *t == ':'); t++) ;
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if (t < PL_bufptr && isSPACE(*t))
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warn("\t(Do you need to predeclare %.*s?)\n",
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t - PL_oldoldbufptr, PL_oldoldbufptr);
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}
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else
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warn("\t(Missing operator before %.*s?)\n", s - oldbp, oldbp);
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PL_bufptr = oldbp;
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}
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STATIC void
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missingterm(char *s)
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{
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char tmpbuf[3];
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char q;
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if (s) {
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char *nl = strrchr(s,'\n');
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if (nl)
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*nl = '\0';
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}
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else if (
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#ifdef EBCDIC
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iscntrl(PL_multi_close)
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#else
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PL_multi_close < 32 || PL_multi_close == 127
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#endif
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) {
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*tmpbuf = '^';
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tmpbuf[1] = toCTRL(PL_multi_close);
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s = "\\n";
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tmpbuf[2] = '\0';
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s = tmpbuf;
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}
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else {
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*tmpbuf = PL_multi_close;
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tmpbuf[1] = '\0';
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s = tmpbuf;
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}
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q = strchr(s,'"') ? '\'' : '"';
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croak("Can't find string terminator %c%s%c anywhere before EOF",q,s,q);
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}
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void
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deprecate(char *s)
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{
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if (PL_dowarn)
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warn("Use of %s is deprecated", s);
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}
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STATIC void
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depcom(void)
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{
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deprecate("comma-less variable list");
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}
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#ifdef WIN32
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STATIC I32
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win32_textfilter(int idx, SV *sv, int maxlen)
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{
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I32 count = FILTER_READ(idx+1, sv, maxlen);
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if (count > 0 && !maxlen)
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win32_strip_return(sv);
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return count;
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}
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#endif
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void
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lex_start(SV *line)
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{
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dTHR;
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char *s;
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STRLEN len;
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SAVEI32(PL_lex_dojoin);
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SAVEI32(PL_lex_brackets);
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SAVEI32(PL_lex_fakebrack);
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SAVEI32(PL_lex_casemods);
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SAVEI32(PL_lex_starts);
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SAVEI32(PL_lex_state);
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SAVESPTR(PL_lex_inpat);
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SAVEI32(PL_lex_inwhat);
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SAVEI16(PL_curcop->cop_line);
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SAVEPPTR(PL_bufptr);
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SAVEPPTR(PL_bufend);
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SAVEPPTR(PL_oldbufptr);
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SAVEPPTR(PL_oldoldbufptr);
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SAVEPPTR(PL_linestart);
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SAVESPTR(PL_linestr);
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SAVEPPTR(PL_lex_brackstack);
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SAVEPPTR(PL_lex_casestack);
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SAVEDESTRUCTOR(restore_rsfp, PL_rsfp);
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SAVESPTR(PL_lex_stuff);
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SAVEI32(PL_lex_defer);
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SAVESPTR(PL_lex_repl);
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SAVEDESTRUCTOR(restore_expect, PL_tokenbuf + PL_expect); /* encode as pointer */
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SAVEDESTRUCTOR(restore_lex_expect, PL_tokenbuf + PL_expect);
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PL_lex_state = LEX_NORMAL;
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PL_lex_defer = 0;
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PL_expect = XSTATE;
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PL_lex_brackets = 0;
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PL_lex_fakebrack = 0;
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New(899, PL_lex_brackstack, 120, char);
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New(899, PL_lex_casestack, 12, char);
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SAVEFREEPV(PL_lex_brackstack);
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SAVEFREEPV(PL_lex_casestack);
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PL_lex_casemods = 0;
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*PL_lex_casestack = '\0';
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PL_lex_dojoin = 0;
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PL_lex_starts = 0;
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PL_lex_stuff = Nullsv;
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PL_lex_repl = Nullsv;
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PL_lex_inpat = 0;
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PL_lex_inwhat = 0;
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PL_linestr = line;
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if (SvREADONLY(PL_linestr))
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PL_linestr = sv_2mortal(newSVsv(PL_linestr));
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s = SvPV(PL_linestr, len);
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if (len && s[len-1] != ';') {
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if (!(SvFLAGS(PL_linestr) & SVs_TEMP))
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PL_linestr = sv_2mortal(newSVsv(PL_linestr));
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sv_catpvn(PL_linestr, "\n;", 2);
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}
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SvTEMP_off(PL_linestr);
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PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
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PL_bufend = PL_bufptr + SvCUR(PL_linestr);
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SvREFCNT_dec(PL_rs);
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PL_rs = newSVpv("\n", 1);
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PL_rsfp = 0;
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}
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void
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lex_end(void)
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{
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PL_doextract = FALSE;
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}
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STATIC void
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restore_rsfp(void *f)
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{
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PerlIO *fp = (PerlIO*)f;
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if (PL_rsfp == PerlIO_stdin())
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PerlIO_clearerr(PL_rsfp);
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else if (PL_rsfp && (PL_rsfp != fp))
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PerlIO_close(PL_rsfp);
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PL_rsfp = fp;
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}
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STATIC void
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restore_expect(void *e)
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{
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/* a safe way to store a small integer in a pointer */
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PL_expect = (expectation)((char *)e - PL_tokenbuf);
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}
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STATIC void
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restore_lex_expect(void *e)
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{
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/* a safe way to store a small integer in a pointer */
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PL_lex_expect = (expectation)((char *)e - PL_tokenbuf);
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}
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STATIC void
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incline(char *s)
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{
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dTHR;
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char *t;
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char *n;
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char ch;
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int sawline = 0;
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PL_curcop->cop_line++;
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if (*s++ != '#')
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return;
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while (*s == ' ' || *s == '\t') s++;
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if (strnEQ(s, "line ", 5)) {
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s += 5;
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sawline = 1;
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}
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if (!isDIGIT(*s))
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return;
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n = s;
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while (isDIGIT(*s))
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s++;
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while (*s == ' ' || *s == '\t')
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s++;
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if (*s == '"' && (t = strchr(s+1, '"')))
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s++;
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else {
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if (!sawline)
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return; /* false alarm */
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for (t = s; !isSPACE(*t); t++) ;
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}
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ch = *t;
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*t = '\0';
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if (t - s > 0)
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PL_curcop->cop_filegv = gv_fetchfile(s);
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else
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PL_curcop->cop_filegv = gv_fetchfile(PL_origfilename);
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*t = ch;
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PL_curcop->cop_line = atoi(n)-1;
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}
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STATIC char *
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skipspace(register char *s)
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{
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dTHR;
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if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
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while (s < PL_bufend && (*s == ' ' || *s == '\t'))
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s++;
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return s;
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}
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for (;;) {
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STRLEN prevlen;
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while (s < PL_bufend && isSPACE(*s)) {
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if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
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incline(s);
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}
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if (s < PL_bufend && *s == '#') {
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while (s < PL_bufend && *s != '\n')
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s++;
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if (s < PL_bufend) {
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s++;
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if (PL_in_eval && !PL_rsfp) {
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incline(s);
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continue;
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}
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}
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}
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if (s < PL_bufend || !PL_rsfp || PL_lex_state != LEX_NORMAL)
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return s;
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if ((s = filter_gets(PL_linestr, PL_rsfp, (prevlen = SvCUR(PL_linestr)))) == Nullch) {
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if (PL_minus_n || PL_minus_p) {
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sv_setpv(PL_linestr,PL_minus_p ?
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";}continue{print or die qq(-p destination: $!\\n)" :
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"");
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sv_catpv(PL_linestr,";}");
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PL_minus_n = PL_minus_p = 0;
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}
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else
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sv_setpv(PL_linestr,";");
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PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
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PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
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if (PL_preprocess && !PL_in_eval)
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(void)PerlProc_pclose(PL_rsfp);
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else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
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PerlIO_clearerr(PL_rsfp);
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else
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(void)PerlIO_close(PL_rsfp);
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PL_rsfp = Nullfp;
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return s;
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}
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PL_linestart = PL_bufptr = s + prevlen;
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PL_bufend = s + SvCUR(PL_linestr);
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s = PL_bufptr;
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incline(s);
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if (PERLDB_LINE && PL_curstash != PL_debstash) {
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SV *sv = NEWSV(85,0);
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sv_upgrade(sv, SVt_PVMG);
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sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
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av_store(GvAV(PL_curcop->cop_filegv),(I32)PL_curcop->cop_line,sv);
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}
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}
|
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}
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|
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STATIC void
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check_uni(void) {
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char *s;
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char ch;
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char *t;
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|
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if (PL_oldoldbufptr != PL_last_uni)
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return;
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while (isSPACE(*PL_last_uni))
|
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PL_last_uni++;
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for (s = PL_last_uni; isALNUM(*s) || *s == '-'; s++) ;
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if ((t = strchr(s, '(')) && t < PL_bufptr)
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return;
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ch = *s;
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*s = '\0';
|
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warn("Warning: Use of \"%s\" without parens is ambiguous", PL_last_uni);
|
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*s = ch;
|
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}
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|
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#ifdef CRIPPLED_CC
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|
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#undef UNI
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#define UNI(f) return uni(f,s)
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|
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STATIC int
|
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uni(I32 f, char *s)
|
|
{
|
|
yylval.ival = f;
|
|
PL_expect = XTERM;
|
|
PL_bufptr = s;
|
|
PL_last_uni = PL_oldbufptr;
|
|
PL_last_lop_op = f;
|
|
if (*s == '(')
|
|
return FUNC1;
|
|
s = skipspace(s);
|
|
if (*s == '(')
|
|
return FUNC1;
|
|
else
|
|
return UNIOP;
|
|
}
|
|
|
|
#endif /* CRIPPLED_CC */
|
|
|
|
#define LOP(f,x) return lop(f,x,s)
|
|
|
|
STATIC I32
|
|
lop(I32 f, expectation x, char *s)
|
|
{
|
|
dTHR;
|
|
yylval.ival = f;
|
|
CLINE;
|
|
PL_expect = x;
|
|
PL_bufptr = s;
|
|
PL_last_lop = PL_oldbufptr;
|
|
PL_last_lop_op = f;
|
|
if (PL_nexttoke)
|
|
return LSTOP;
|
|
if (*s == '(')
|
|
return FUNC;
|
|
s = skipspace(s);
|
|
if (*s == '(')
|
|
return FUNC;
|
|
else
|
|
return LSTOP;
|
|
}
|
|
|
|
STATIC void
|
|
force_next(I32 type)
|
|
{
|
|
PL_nexttype[PL_nexttoke] = type;
|
|
PL_nexttoke++;
|
|
if (PL_lex_state != LEX_KNOWNEXT) {
|
|
PL_lex_defer = PL_lex_state;
|
|
PL_lex_expect = PL_expect;
|
|
PL_lex_state = LEX_KNOWNEXT;
|
|
}
|
|
}
|
|
|
|
STATIC char *
|
|
force_word(register char *start, int token, int check_keyword, int allow_pack, int allow_initial_tick)
|
|
{
|
|
register char *s;
|
|
STRLEN len;
|
|
|
|
start = skipspace(start);
|
|
s = start;
|
|
if (isIDFIRST(*s) ||
|
|
(allow_pack && *s == ':') ||
|
|
(allow_initial_tick && *s == '\'') )
|
|
{
|
|
s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, allow_pack, &len);
|
|
if (check_keyword && keyword(PL_tokenbuf, len))
|
|
return start;
|
|
if (token == METHOD) {
|
|
s = skipspace(s);
|
|
if (*s == '(')
|
|
PL_expect = XTERM;
|
|
else {
|
|
PL_expect = XOPERATOR;
|
|
force_next(')');
|
|
force_next('(');
|
|
}
|
|
}
|
|
PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST,0, newSVpv(PL_tokenbuf,0));
|
|
PL_nextval[PL_nexttoke].opval->op_private |= OPpCONST_BARE;
|
|
force_next(token);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
STATIC void
|
|
force_ident(register char *s, int kind)
|
|
{
|
|
if (s && *s) {
|
|
OP* o = (OP*)newSVOP(OP_CONST, 0, newSVpv(s,0));
|
|
PL_nextval[PL_nexttoke].opval = o;
|
|
force_next(WORD);
|
|
if (kind) {
|
|
dTHR; /* just for in_eval */
|
|
o->op_private = OPpCONST_ENTERED;
|
|
/* XXX see note in pp_entereval() for why we forgo typo
|
|
warnings if the symbol must be introduced in an eval.
|
|
GSAR 96-10-12 */
|
|
gv_fetchpv(s, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
|
|
kind == '$' ? SVt_PV :
|
|
kind == '@' ? SVt_PVAV :
|
|
kind == '%' ? SVt_PVHV :
|
|
SVt_PVGV
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
STATIC char *
|
|
force_version(char *s)
|
|
{
|
|
OP *version = Nullop;
|
|
|
|
s = skipspace(s);
|
|
|
|
/* default VERSION number -- GBARR */
|
|
|
|
if(isDIGIT(*s)) {
|
|
char *d;
|
|
int c;
|
|
for( d=s, c = 1; isDIGIT(*d) || *d == '_' || (*d == '.' && c--); d++);
|
|
if((*d == ';' || isSPACE(*d)) && *(skipspace(d)) != ',') {
|
|
s = scan_num(s);
|
|
/* real VERSION number -- GBARR */
|
|
version = yylval.opval;
|
|
}
|
|
}
|
|
|
|
/* NOTE: The parser sees the package name and the VERSION swapped */
|
|
PL_nextval[PL_nexttoke].opval = version;
|
|
force_next(WORD);
|
|
|
|
return (s);
|
|
}
|
|
|
|
STATIC SV *
|
|
tokeq(SV *sv)
|
|
{
|
|
register char *s;
|
|
register char *send;
|
|
register char *d;
|
|
STRLEN len = 0;
|
|
SV *pv = sv;
|
|
|
|
if (!SvLEN(sv))
|
|
goto finish;
|
|
|
|
s = SvPV_force(sv, len);
|
|
if (SvIVX(sv) == -1)
|
|
goto finish;
|
|
send = s + len;
|
|
while (s < send && *s != '\\')
|
|
s++;
|
|
if (s == send)
|
|
goto finish;
|
|
d = s;
|
|
if ( PL_hints & HINT_NEW_STRING )
|
|
pv = sv_2mortal(newSVpv(SvPVX(pv), len));
|
|
while (s < send) {
|
|
if (*s == '\\') {
|
|
if (s + 1 < send && (s[1] == '\\'))
|
|
s++; /* all that, just for this */
|
|
}
|
|
*d++ = *s++;
|
|
}
|
|
*d = '\0';
|
|
SvCUR_set(sv, d - SvPVX(sv));
|
|
finish:
|
|
if ( PL_hints & HINT_NEW_STRING )
|
|
return new_constant(NULL, 0, "q", sv, pv, "q");
|
|
return sv;
|
|
}
|
|
|
|
STATIC I32
|
|
sublex_start(void)
|
|
{
|
|
register I32 op_type = yylval.ival;
|
|
|
|
if (op_type == OP_NULL) {
|
|
yylval.opval = PL_lex_op;
|
|
PL_lex_op = Nullop;
|
|
return THING;
|
|
}
|
|
if (op_type == OP_CONST || op_type == OP_READLINE) {
|
|
SV *sv = tokeq(PL_lex_stuff);
|
|
|
|
if (SvTYPE(sv) == SVt_PVIV) {
|
|
/* Overloaded constants, nothing fancy: Convert to SVt_PV: */
|
|
STRLEN len;
|
|
char *p;
|
|
SV *nsv;
|
|
|
|
p = SvPV(sv, len);
|
|
nsv = newSVpv(p, len);
|
|
SvREFCNT_dec(sv);
|
|
sv = nsv;
|
|
}
|
|
yylval.opval = (OP*)newSVOP(op_type, 0, sv);
|
|
PL_lex_stuff = Nullsv;
|
|
return THING;
|
|
}
|
|
|
|
PL_sublex_info.super_state = PL_lex_state;
|
|
PL_sublex_info.sub_inwhat = op_type;
|
|
PL_sublex_info.sub_op = PL_lex_op;
|
|
PL_lex_state = LEX_INTERPPUSH;
|
|
|
|
PL_expect = XTERM;
|
|
if (PL_lex_op) {
|
|
yylval.opval = PL_lex_op;
|
|
PL_lex_op = Nullop;
|
|
return PMFUNC;
|
|
}
|
|
else
|
|
return FUNC;
|
|
}
|
|
|
|
STATIC I32
|
|
sublex_push(void)
|
|
{
|
|
dTHR;
|
|
ENTER;
|
|
|
|
PL_lex_state = PL_sublex_info.super_state;
|
|
SAVEI32(PL_lex_dojoin);
|
|
SAVEI32(PL_lex_brackets);
|
|
SAVEI32(PL_lex_fakebrack);
|
|
SAVEI32(PL_lex_casemods);
|
|
SAVEI32(PL_lex_starts);
|
|
SAVEI32(PL_lex_state);
|
|
SAVESPTR(PL_lex_inpat);
|
|
SAVEI32(PL_lex_inwhat);
|
|
SAVEI16(PL_curcop->cop_line);
|
|
SAVEPPTR(PL_bufptr);
|
|
SAVEPPTR(PL_oldbufptr);
|
|
SAVEPPTR(PL_oldoldbufptr);
|
|
SAVEPPTR(PL_linestart);
|
|
SAVESPTR(PL_linestr);
|
|
SAVEPPTR(PL_lex_brackstack);
|
|
SAVEPPTR(PL_lex_casestack);
|
|
|
|
PL_linestr = PL_lex_stuff;
|
|
PL_lex_stuff = Nullsv;
|
|
|
|
PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
|
|
PL_bufend += SvCUR(PL_linestr);
|
|
SAVEFREESV(PL_linestr);
|
|
|
|
PL_lex_dojoin = FALSE;
|
|
PL_lex_brackets = 0;
|
|
PL_lex_fakebrack = 0;
|
|
New(899, PL_lex_brackstack, 120, char);
|
|
New(899, PL_lex_casestack, 12, char);
|
|
SAVEFREEPV(PL_lex_brackstack);
|
|
SAVEFREEPV(PL_lex_casestack);
|
|
PL_lex_casemods = 0;
|
|
*PL_lex_casestack = '\0';
|
|
PL_lex_starts = 0;
|
|
PL_lex_state = LEX_INTERPCONCAT;
|
|
PL_curcop->cop_line = PL_multi_start;
|
|
|
|
PL_lex_inwhat = PL_sublex_info.sub_inwhat;
|
|
if (PL_lex_inwhat == OP_MATCH || PL_lex_inwhat == OP_QR || PL_lex_inwhat == OP_SUBST)
|
|
PL_lex_inpat = PL_sublex_info.sub_op;
|
|
else
|
|
PL_lex_inpat = Nullop;
|
|
|
|
return '(';
|
|
}
|
|
|
|
STATIC I32
|
|
sublex_done(void)
|
|
{
|
|
if (!PL_lex_starts++) {
|
|
PL_expect = XOPERATOR;
|
|
yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv("",0));
|
|
return THING;
|
|
}
|
|
|
|
if (PL_lex_casemods) { /* oops, we've got some unbalanced parens */
|
|
PL_lex_state = LEX_INTERPCASEMOD;
|
|
return yylex();
|
|
}
|
|
|
|
/* Is there a right-hand side to take care of? */
|
|
if (PL_lex_repl && (PL_lex_inwhat == OP_SUBST || PL_lex_inwhat == OP_TRANS)) {
|
|
PL_linestr = PL_lex_repl;
|
|
PL_lex_inpat = 0;
|
|
PL_bufend = PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
|
|
PL_bufend += SvCUR(PL_linestr);
|
|
SAVEFREESV(PL_linestr);
|
|
PL_lex_dojoin = FALSE;
|
|
PL_lex_brackets = 0;
|
|
PL_lex_fakebrack = 0;
|
|
PL_lex_casemods = 0;
|
|
*PL_lex_casestack = '\0';
|
|
PL_lex_starts = 0;
|
|
if (SvCOMPILED(PL_lex_repl)) {
|
|
PL_lex_state = LEX_INTERPNORMAL;
|
|
PL_lex_starts++;
|
|
}
|
|
else
|
|
PL_lex_state = LEX_INTERPCONCAT;
|
|
PL_lex_repl = Nullsv;
|
|
return ',';
|
|
}
|
|
else {
|
|
LEAVE;
|
|
PL_bufend = SvPVX(PL_linestr);
|
|
PL_bufend += SvCUR(PL_linestr);
|
|
PL_expect = XOPERATOR;
|
|
return ')';
|
|
}
|
|
}
|
|
|
|
/*
|
|
scan_const
|
|
|
|
Extracts a pattern, double-quoted string, or transliteration. This
|
|
is terrifying code.
|
|
|
|
It looks at lex_inwhat and PL_lex_inpat to find out whether it's
|
|
processing a pattern (PL_lex_inpat is true), a transliteration
|
|
(lex_inwhat & OP_TRANS is true), or a double-quoted string.
|
|
|
|
Returns a pointer to the character scanned up to. Iff this is
|
|
advanced from the start pointer supplied (ie if anything was
|
|
successfully parsed), will leave an OP for the substring scanned
|
|
in yylval. Caller must intuit reason for not parsing further
|
|
by looking at the next characters herself.
|
|
|
|
In patterns:
|
|
backslashes:
|
|
double-quoted style: \r and \n
|
|
regexp special ones: \D \s
|
|
constants: \x3
|
|
backrefs: \1 (deprecated in substitution replacements)
|
|
case and quoting: \U \Q \E
|
|
stops on @ and $, but not for $ as tail anchor
|
|
|
|
In transliterations:
|
|
characters are VERY literal, except for - not at the start or end
|
|
of the string, which indicates a range. scan_const expands the
|
|
range to the full set of intermediate characters.
|
|
|
|
In double-quoted strings:
|
|
backslashes:
|
|
double-quoted style: \r and \n
|
|
constants: \x3
|
|
backrefs: \1 (deprecated)
|
|
case and quoting: \U \Q \E
|
|
stops on @ and $
|
|
|
|
scan_const does *not* construct ops to handle interpolated strings.
|
|
It stops processing as soon as it finds an embedded $ or @ variable
|
|
and leaves it to the caller to work out what's going on.
|
|
|
|
@ in pattern could be: @foo, @{foo}, @$foo, @'foo, @:foo.
|
|
|
|
$ in pattern could be $foo or could be tail anchor. Assumption:
|
|
it's a tail anchor if $ is the last thing in the string, or if it's
|
|
followed by one of ")| \n\t"
|
|
|
|
\1 (backreferences) are turned into $1
|
|
|
|
The structure of the code is
|
|
while (there's a character to process) {
|
|
handle transliteration ranges
|
|
skip regexp comments
|
|
skip # initiated comments in //x patterns
|
|
check for embedded @foo
|
|
check for embedded scalars
|
|
if (backslash) {
|
|
leave intact backslashes from leave (below)
|
|
deprecate \1 in strings and sub replacements
|
|
handle string-changing backslashes \l \U \Q \E, etc.
|
|
switch (what was escaped) {
|
|
handle - in a transliteration (becomes a literal -)
|
|
handle \132 octal characters
|
|
handle 0x15 hex characters
|
|
handle \cV (control V)
|
|
handle printf backslashes (\f, \r, \n, etc)
|
|
} (end switch)
|
|
} (end if backslash)
|
|
} (end while character to read)
|
|
|
|
*/
|
|
|
|
STATIC char *
|
|
scan_const(char *start)
|
|
{
|
|
register char *send = PL_bufend; /* end of the constant */
|
|
SV *sv = NEWSV(93, send - start); /* sv for the constant */
|
|
register char *s = start; /* start of the constant */
|
|
register char *d = SvPVX(sv); /* destination for copies */
|
|
bool dorange = FALSE; /* are we in a translit range? */
|
|
I32 len; /* ? */
|
|
|
|
/* leaveit is the set of acceptably-backslashed characters */
|
|
char *leaveit =
|
|
PL_lex_inpat
|
|
? "\\.^$@AGZdDwWsSbB+*?|()-nrtfeaxcz0123456789[{]} \t\n\r\f\v#"
|
|
: "";
|
|
|
|
while (s < send || dorange) {
|
|
/* get transliterations out of the way (they're most literal) */
|
|
if (PL_lex_inwhat == OP_TRANS) {
|
|
/* expand a range A-Z to the full set of characters. AIE! */
|
|
if (dorange) {
|
|
I32 i; /* current expanded character */
|
|
I32 min; /* first character in range */
|
|
I32 max; /* last character in range */
|
|
|
|
i = d - SvPVX(sv); /* remember current offset */
|
|
SvGROW(sv, SvLEN(sv) + 256); /* expand the sv -- there'll never be more'n 256 chars in a range for it to grow by */
|
|
d = SvPVX(sv) + i; /* restore d after the grow potentially has changed the ptr */
|
|
d -= 2; /* eat the first char and the - */
|
|
|
|
min = (U8)*d; /* first char in range */
|
|
max = (U8)d[1]; /* last char in range */
|
|
|
|
#ifndef ASCIIish
|
|
if ((isLOWER(min) && isLOWER(max)) ||
|
|
(isUPPER(min) && isUPPER(max))) {
|
|
if (isLOWER(min)) {
|
|
for (i = min; i <= max; i++)
|
|
if (isLOWER(i))
|
|
*d++ = i;
|
|
} else {
|
|
for (i = min; i <= max; i++)
|
|
if (isUPPER(i))
|
|
*d++ = i;
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
for (i = min; i <= max; i++)
|
|
*d++ = i;
|
|
|
|
/* mark the range as done, and continue */
|
|
dorange = FALSE;
|
|
continue;
|
|
}
|
|
|
|
/* range begins (ignore - as first or last char) */
|
|
else if (*s == '-' && s+1 < send && s != start) {
|
|
dorange = TRUE;
|
|
s++;
|
|
}
|
|
}
|
|
|
|
/* if we get here, we're not doing a transliteration */
|
|
|
|
/* skip for regexp comments /(?#comment)/ */
|
|
else if (*s == '(' && PL_lex_inpat && s[1] == '?') {
|
|
if (s[2] == '#') {
|
|
while (s < send && *s != ')')
|
|
*d++ = *s++;
|
|
} else if (s[2] == '{') { /* This should march regcomp.c */
|
|
I32 count = 1;
|
|
char *regparse = s + 3;
|
|
char c;
|
|
|
|
while (count && (c = *regparse)) {
|
|
if (c == '\\' && regparse[1])
|
|
regparse++;
|
|
else if (c == '{')
|
|
count++;
|
|
else if (c == '}')
|
|
count--;
|
|
regparse++;
|
|
}
|
|
if (*regparse == ')')
|
|
regparse++;
|
|
else
|
|
yyerror("Sequence (?{...}) not terminated or not {}-balanced");
|
|
while (s < regparse && *s != ')')
|
|
*d++ = *s++;
|
|
}
|
|
}
|
|
|
|
/* likewise skip #-initiated comments in //x patterns */
|
|
else if (*s == '#' && PL_lex_inpat &&
|
|
((PMOP*)PL_lex_inpat)->op_pmflags & PMf_EXTENDED) {
|
|
while (s+1 < send && *s != '\n')
|
|
*d++ = *s++;
|
|
}
|
|
|
|
/* check for embedded arrays (@foo, @:foo, @'foo, @{foo}, @$foo) */
|
|
else if (*s == '@' && s[1] && (isALNUM(s[1]) || strchr(":'{$", s[1])))
|
|
break;
|
|
|
|
/* check for embedded scalars. only stop if we're sure it's a
|
|
variable.
|
|
*/
|
|
else if (*s == '$') {
|
|
if (!PL_lex_inpat) /* not a regexp, so $ must be var */
|
|
break;
|
|
if (s + 1 < send && !strchr("()| \n\t", s[1]))
|
|
break; /* in regexp, $ might be tail anchor */
|
|
}
|
|
|
|
/* backslashes */
|
|
if (*s == '\\' && s+1 < send) {
|
|
s++;
|
|
|
|
/* some backslashes we leave behind */
|
|
if (*s && strchr(leaveit, *s)) {
|
|
*d++ = '\\';
|
|
*d++ = *s++;
|
|
continue;
|
|
}
|
|
|
|
/* deprecate \1 in strings and substitution replacements */
|
|
if (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat &&
|
|
isDIGIT(*s) && *s != '0' && !isDIGIT(s[1]))
|
|
{
|
|
if (PL_dowarn)
|
|
warn("\\%c better written as $%c", *s, *s);
|
|
*--s = '$';
|
|
break;
|
|
}
|
|
|
|
/* string-change backslash escapes */
|
|
if (PL_lex_inwhat != OP_TRANS && *s && strchr("lLuUEQ", *s)) {
|
|
--s;
|
|
break;
|
|
}
|
|
|
|
/* if we get here, it's either a quoted -, or a digit */
|
|
switch (*s) {
|
|
|
|
/* quoted - in transliterations */
|
|
case '-':
|
|
if (PL_lex_inwhat == OP_TRANS) {
|
|
*d++ = *s++;
|
|
continue;
|
|
}
|
|
/* FALL THROUGH */
|
|
/* default action is to copy the quoted character */
|
|
default:
|
|
*d++ = *s++;
|
|
continue;
|
|
|
|
/* \132 indicates an octal constant */
|
|
case '0': case '1': case '2': case '3':
|
|
case '4': case '5': case '6': case '7':
|
|
*d++ = scan_oct(s, 3, &len);
|
|
s += len;
|
|
continue;
|
|
|
|
/* \x24 indicates a hex constant */
|
|
case 'x':
|
|
*d++ = scan_hex(++s, 2, &len);
|
|
s += len;
|
|
continue;
|
|
|
|
/* \c is a control character */
|
|
case 'c':
|
|
s++;
|
|
#ifdef EBCDIC
|
|
*d = *s++;
|
|
if (isLOWER(*d))
|
|
*d = toUPPER(*d);
|
|
*d++ = toCTRL(*d);
|
|
#else
|
|
len = *s++;
|
|
*d++ = toCTRL(len);
|
|
#endif
|
|
continue;
|
|
|
|
/* printf-style backslashes, formfeeds, newlines, etc */
|
|
case 'b':
|
|
*d++ = '\b';
|
|
break;
|
|
case 'n':
|
|
*d++ = '\n';
|
|
break;
|
|
case 'r':
|
|
*d++ = '\r';
|
|
break;
|
|
case 'f':
|
|
*d++ = '\f';
|
|
break;
|
|
case 't':
|
|
*d++ = '\t';
|
|
break;
|
|
case 'e':
|
|
*d++ = '\033';
|
|
break;
|
|
case 'a':
|
|
*d++ = '\007';
|
|
break;
|
|
} /* end switch */
|
|
|
|
s++;
|
|
continue;
|
|
} /* end if (backslash) */
|
|
|
|
*d++ = *s++;
|
|
} /* while loop to process each character */
|
|
|
|
/* terminate the string and set up the sv */
|
|
*d = '\0';
|
|
SvCUR_set(sv, d - SvPVX(sv));
|
|
SvPOK_on(sv);
|
|
|
|
/* shrink the sv if we allocated more than we used */
|
|
if (SvCUR(sv) + 5 < SvLEN(sv)) {
|
|
SvLEN_set(sv, SvCUR(sv) + 1);
|
|
Renew(SvPVX(sv), SvLEN(sv), char);
|
|
}
|
|
|
|
/* return the substring (via yylval) only if we parsed anything */
|
|
if (s > PL_bufptr) {
|
|
if ( PL_hints & ( PL_lex_inpat ? HINT_NEW_RE : HINT_NEW_STRING ) )
|
|
sv = new_constant(start, s - start, (PL_lex_inpat ? "qr" : "q"),
|
|
sv, Nullsv,
|
|
( PL_lex_inwhat == OP_TRANS
|
|
? "tr"
|
|
: ( (PL_lex_inwhat == OP_SUBST && !PL_lex_inpat)
|
|
? "s"
|
|
: "qq")));
|
|
yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
|
|
} else
|
|
SvREFCNT_dec(sv);
|
|
return s;
|
|
}
|
|
|
|
/* This is the one truly awful dwimmer necessary to conflate C and sed. */
|
|
STATIC int
|
|
intuit_more(register char *s)
|
|
{
|
|
if (PL_lex_brackets)
|
|
return TRUE;
|
|
if (*s == '-' && s[1] == '>' && (s[2] == '[' || s[2] == '{'))
|
|
return TRUE;
|
|
if (*s != '{' && *s != '[')
|
|
return FALSE;
|
|
if (!PL_lex_inpat)
|
|
return TRUE;
|
|
|
|
/* In a pattern, so maybe we have {n,m}. */
|
|
if (*s == '{') {
|
|
s++;
|
|
if (!isDIGIT(*s))
|
|
return TRUE;
|
|
while (isDIGIT(*s))
|
|
s++;
|
|
if (*s == ',')
|
|
s++;
|
|
while (isDIGIT(*s))
|
|
s++;
|
|
if (*s == '}')
|
|
return FALSE;
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
/* On the other hand, maybe we have a character class */
|
|
|
|
s++;
|
|
if (*s == ']' || *s == '^')
|
|
return FALSE;
|
|
else {
|
|
int weight = 2; /* let's weigh the evidence */
|
|
char seen[256];
|
|
unsigned char un_char = 255, last_un_char;
|
|
char *send = strchr(s,']');
|
|
char tmpbuf[sizeof PL_tokenbuf * 4];
|
|
|
|
if (!send) /* has to be an expression */
|
|
return TRUE;
|
|
|
|
Zero(seen,256,char);
|
|
if (*s == '$')
|
|
weight -= 3;
|
|
else if (isDIGIT(*s)) {
|
|
if (s[1] != ']') {
|
|
if (isDIGIT(s[1]) && s[2] == ']')
|
|
weight -= 10;
|
|
}
|
|
else
|
|
weight -= 100;
|
|
}
|
|
for (; s < send; s++) {
|
|
last_un_char = un_char;
|
|
un_char = (unsigned char)*s;
|
|
switch (*s) {
|
|
case '@':
|
|
case '&':
|
|
case '$':
|
|
weight -= seen[un_char] * 10;
|
|
if (isALNUM(s[1])) {
|
|
scan_ident(s, send, tmpbuf, sizeof tmpbuf, FALSE);
|
|
if ((int)strlen(tmpbuf) > 1 && gv_fetchpv(tmpbuf,FALSE, SVt_PV))
|
|
weight -= 100;
|
|
else
|
|
weight -= 10;
|
|
}
|
|
else if (*s == '$' && s[1] &&
|
|
strchr("[#!%*<>()-=",s[1])) {
|
|
if (/*{*/ strchr("])} =",s[2]))
|
|
weight -= 10;
|
|
else
|
|
weight -= 1;
|
|
}
|
|
break;
|
|
case '\\':
|
|
un_char = 254;
|
|
if (s[1]) {
|
|
if (strchr("wds]",s[1]))
|
|
weight += 100;
|
|
else if (seen['\''] || seen['"'])
|
|
weight += 1;
|
|
else if (strchr("rnftbxcav",s[1]))
|
|
weight += 40;
|
|
else if (isDIGIT(s[1])) {
|
|
weight += 40;
|
|
while (s[1] && isDIGIT(s[1]))
|
|
s++;
|
|
}
|
|
}
|
|
else
|
|
weight += 100;
|
|
break;
|
|
case '-':
|
|
if (s[1] == '\\')
|
|
weight += 50;
|
|
if (strchr("aA01! ",last_un_char))
|
|
weight += 30;
|
|
if (strchr("zZ79~",s[1]))
|
|
weight += 30;
|
|
if (last_un_char == 255 && (isDIGIT(s[1]) || s[1] == '$'))
|
|
weight -= 5; /* cope with negative subscript */
|
|
break;
|
|
default:
|
|
if (!isALNUM(last_un_char) && !strchr("$@&",last_un_char) &&
|
|
isALPHA(*s) && s[1] && isALPHA(s[1])) {
|
|
char *d = tmpbuf;
|
|
while (isALPHA(*s))
|
|
*d++ = *s++;
|
|
*d = '\0';
|
|
if (keyword(tmpbuf, d - tmpbuf))
|
|
weight -= 150;
|
|
}
|
|
if (un_char == last_un_char + 1)
|
|
weight += 5;
|
|
weight -= seen[un_char];
|
|
break;
|
|
}
|
|
seen[un_char]++;
|
|
}
|
|
if (weight >= 0) /* probably a character class */
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
STATIC int
|
|
intuit_method(char *start, GV *gv)
|
|
{
|
|
char *s = start + (*start == '$');
|
|
char tmpbuf[sizeof PL_tokenbuf];
|
|
STRLEN len;
|
|
GV* indirgv;
|
|
|
|
if (gv) {
|
|
CV *cv;
|
|
if (GvIO(gv))
|
|
return 0;
|
|
if ((cv = GvCVu(gv))) {
|
|
char *proto = SvPVX(cv);
|
|
if (proto) {
|
|
if (*proto == ';')
|
|
proto++;
|
|
if (*proto == '*')
|
|
return 0;
|
|
}
|
|
} else
|
|
gv = 0;
|
|
}
|
|
s = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
|
|
if (*start == '$') {
|
|
if (gv || PL_last_lop_op == OP_PRINT || isUPPER(*PL_tokenbuf))
|
|
return 0;
|
|
s = skipspace(s);
|
|
PL_bufptr = start;
|
|
PL_expect = XREF;
|
|
return *s == '(' ? FUNCMETH : METHOD;
|
|
}
|
|
if (!keyword(tmpbuf, len)) {
|
|
if (len > 2 && tmpbuf[len - 2] == ':' && tmpbuf[len - 1] == ':') {
|
|
len -= 2;
|
|
tmpbuf[len] = '\0';
|
|
goto bare_package;
|
|
}
|
|
indirgv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
|
|
if (indirgv && GvCVu(indirgv))
|
|
return 0;
|
|
/* filehandle or package name makes it a method */
|
|
if (!gv || GvIO(indirgv) || gv_stashpvn(tmpbuf, len, FALSE)) {
|
|
s = skipspace(s);
|
|
if ((PL_bufend - s) >= 2 && *s == '=' && *(s+1) == '>')
|
|
return 0; /* no assumptions -- "=>" quotes bearword */
|
|
bare_package:
|
|
PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0,
|
|
newSVpv(tmpbuf,0));
|
|
PL_nextval[PL_nexttoke].opval->op_private = OPpCONST_BARE;
|
|
PL_expect = XTERM;
|
|
force_next(WORD);
|
|
PL_bufptr = s;
|
|
return *s == '(' ? FUNCMETH : METHOD;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
STATIC char*
|
|
incl_perldb(void)
|
|
{
|
|
if (PL_perldb) {
|
|
char *pdb = PerlEnv_getenv("PERL5DB");
|
|
|
|
if (pdb)
|
|
return pdb;
|
|
SETERRNO(0,SS$_NORMAL);
|
|
return "BEGIN { require 'perl5db.pl' }";
|
|
}
|
|
return "";
|
|
}
|
|
|
|
|
|
/* Encoded script support. filter_add() effectively inserts a
|
|
* 'pre-processing' function into the current source input stream.
|
|
* Note that the filter function only applies to the current source file
|
|
* (e.g., it will not affect files 'require'd or 'use'd by this one).
|
|
*
|
|
* The datasv parameter (which may be NULL) can be used to pass
|
|
* private data to this instance of the filter. The filter function
|
|
* can recover the SV using the FILTER_DATA macro and use it to
|
|
* store private buffers and state information.
|
|
*
|
|
* The supplied datasv parameter is upgraded to a PVIO type
|
|
* and the IoDIRP field is used to store the function pointer.
|
|
* Note that IoTOP_NAME, IoFMT_NAME, IoBOTTOM_NAME, if set for
|
|
* private use must be set using malloc'd pointers.
|
|
*/
|
|
#ifndef PERL_OBJECT
|
|
static int filter_debug = 0;
|
|
#endif
|
|
|
|
SV *
|
|
filter_add(filter_t funcp, SV *datasv)
|
|
{
|
|
if (!funcp){ /* temporary handy debugging hack to be deleted */
|
|
filter_debug = atoi((char*)datasv);
|
|
return NULL;
|
|
}
|
|
if (!PL_rsfp_filters)
|
|
PL_rsfp_filters = newAV();
|
|
if (!datasv)
|
|
datasv = NEWSV(255,0);
|
|
if (!SvUPGRADE(datasv, SVt_PVIO))
|
|
die("Can't upgrade filter_add data to SVt_PVIO");
|
|
IoDIRP(datasv) = (DIR*)funcp; /* stash funcp into spare field */
|
|
if (filter_debug) {
|
|
STRLEN n_a;
|
|
warn("filter_add func %p (%s)", funcp, SvPV(datasv,n_a));
|
|
}
|
|
av_unshift(PL_rsfp_filters, 1);
|
|
av_store(PL_rsfp_filters, 0, datasv) ;
|
|
return(datasv);
|
|
}
|
|
|
|
|
|
/* Delete most recently added instance of this filter function. */
|
|
void
|
|
filter_del(filter_t funcp)
|
|
{
|
|
if (filter_debug)
|
|
warn("filter_del func %p", funcp);
|
|
if (!PL_rsfp_filters || AvFILLp(PL_rsfp_filters)<0)
|
|
return;
|
|
/* if filter is on top of stack (usual case) just pop it off */
|
|
if (IoDIRP(FILTER_DATA(AvFILLp(PL_rsfp_filters))) == (DIR*)funcp){
|
|
sv_free(av_pop(PL_rsfp_filters));
|
|
|
|
return;
|
|
}
|
|
/* we need to search for the correct entry and clear it */
|
|
die("filter_del can only delete in reverse order (currently)");
|
|
}
|
|
|
|
|
|
/* Invoke the n'th filter function for the current rsfp. */
|
|
I32
|
|
filter_read(int idx, SV *buf_sv, int maxlen)
|
|
|
|
|
|
/* 0 = read one text line */
|
|
{
|
|
filter_t funcp;
|
|
SV *datasv = NULL;
|
|
|
|
if (!PL_rsfp_filters)
|
|
return -1;
|
|
if (idx > AvFILLp(PL_rsfp_filters)){ /* Any more filters? */
|
|
/* Provide a default input filter to make life easy. */
|
|
/* Note that we append to the line. This is handy. */
|
|
if (filter_debug)
|
|
warn("filter_read %d: from rsfp\n", idx);
|
|
if (maxlen) {
|
|
/* Want a block */
|
|
int len ;
|
|
int old_len = SvCUR(buf_sv) ;
|
|
|
|
/* ensure buf_sv is large enough */
|
|
SvGROW(buf_sv, old_len + maxlen) ;
|
|
if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
|
|
if (PerlIO_error(PL_rsfp))
|
|
return -1; /* error */
|
|
else
|
|
return 0 ; /* end of file */
|
|
}
|
|
SvCUR_set(buf_sv, old_len + len) ;
|
|
} else {
|
|
/* Want a line */
|
|
if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
|
|
if (PerlIO_error(PL_rsfp))
|
|
return -1; /* error */
|
|
else
|
|
return 0 ; /* end of file */
|
|
}
|
|
}
|
|
return SvCUR(buf_sv);
|
|
}
|
|
/* Skip this filter slot if filter has been deleted */
|
|
if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef){
|
|
if (filter_debug)
|
|
warn("filter_read %d: skipped (filter deleted)\n", idx);
|
|
return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
|
|
}
|
|
/* Get function pointer hidden within datasv */
|
|
funcp = (filter_t)IoDIRP(datasv);
|
|
if (filter_debug) {
|
|
STRLEN n_a;
|
|
warn("filter_read %d: via function %p (%s)\n",
|
|
idx, funcp, SvPV(datasv,n_a));
|
|
}
|
|
/* Call function. The function is expected to */
|
|
/* call "FILTER_READ(idx+1, buf_sv)" first. */
|
|
/* Return: <0:error, =0:eof, >0:not eof */
|
|
return (*funcp)(PERL_OBJECT_THIS_ idx, buf_sv, maxlen);
|
|
}
|
|
|
|
STATIC char *
|
|
filter_gets(register SV *sv, register PerlIO *fp, STRLEN append)
|
|
{
|
|
#ifdef WIN32FILTER
|
|
if (!PL_rsfp_filters) {
|
|
filter_add(win32_textfilter,NULL);
|
|
}
|
|
#endif
|
|
if (PL_rsfp_filters) {
|
|
|
|
if (!append)
|
|
SvCUR_set(sv, 0); /* start with empty line */
|
|
if (FILTER_READ(0, sv, 0) > 0)
|
|
return ( SvPVX(sv) ) ;
|
|
else
|
|
return Nullch ;
|
|
}
|
|
else
|
|
return (sv_gets(sv, fp, append));
|
|
}
|
|
|
|
|
|
#ifdef DEBUGGING
|
|
static char* exp_name[] =
|
|
{ "OPERATOR", "TERM", "REF", "STATE", "BLOCK", "TERMBLOCK" };
|
|
#endif
|
|
|
|
EXT int yychar; /* last token */
|
|
|
|
/*
|
|
yylex
|
|
|
|
Works out what to call the token just pulled out of the input
|
|
stream. The yacc parser takes care of taking the ops we return and
|
|
stitching them into a tree.
|
|
|
|
Returns:
|
|
PRIVATEREF
|
|
|
|
Structure:
|
|
if read an identifier
|
|
if we're in a my declaration
|
|
croak if they tried to say my($foo::bar)
|
|
build the ops for a my() declaration
|
|
if it's an access to a my() variable
|
|
are we in a sort block?
|
|
croak if my($a); $a <=> $b
|
|
build ops for access to a my() variable
|
|
if in a dq string, and they've said @foo and we can't find @foo
|
|
croak
|
|
build ops for a bareword
|
|
if we already built the token before, use it.
|
|
*/
|
|
|
|
int
|
|
yylex(void)
|
|
{
|
|
dTHR;
|
|
register char *s;
|
|
register char *d;
|
|
register I32 tmp;
|
|
STRLEN len;
|
|
GV *gv = Nullgv;
|
|
GV **gvp = 0;
|
|
|
|
/* check if there's an identifier for us to look at */
|
|
if (PL_pending_ident) {
|
|
/* pit holds the identifier we read and pending_ident is reset */
|
|
char pit = PL_pending_ident;
|
|
PL_pending_ident = 0;
|
|
|
|
/* if we're in a my(), we can't allow dynamics here.
|
|
$foo'bar has already been turned into $foo::bar, so
|
|
just check for colons.
|
|
|
|
if it's a legal name, the OP is a PADANY.
|
|
*/
|
|
if (PL_in_my) {
|
|
if (strchr(PL_tokenbuf,':'))
|
|
croak(no_myglob,PL_tokenbuf);
|
|
|
|
yylval.opval = newOP(OP_PADANY, 0);
|
|
yylval.opval->op_targ = pad_allocmy(PL_tokenbuf);
|
|
return PRIVATEREF;
|
|
}
|
|
|
|
/*
|
|
build the ops for accesses to a my() variable.
|
|
|
|
Deny my($a) or my($b) in a sort block, *if* $a or $b is
|
|
then used in a comparison. This catches most, but not
|
|
all cases. For instance, it catches
|
|
sort { my($a); $a <=> $b }
|
|
but not
|
|
sort { my($a); $a < $b ? -1 : $a == $b ? 0 : 1; }
|
|
(although why you'd do that is anyone's guess).
|
|
*/
|
|
|
|
if (!strchr(PL_tokenbuf,':')) {
|
|
#ifdef USE_THREADS
|
|
/* Check for single character per-thread SVs */
|
|
if (PL_tokenbuf[0] == '$' && PL_tokenbuf[2] == '\0'
|
|
&& !isALPHA(PL_tokenbuf[1]) /* Rule out obvious non-threadsvs */
|
|
&& (tmp = find_threadsv(&PL_tokenbuf[1])) != NOT_IN_PAD)
|
|
{
|
|
yylval.opval = newOP(OP_THREADSV, 0);
|
|
yylval.opval->op_targ = tmp;
|
|
return PRIVATEREF;
|
|
}
|
|
#endif /* USE_THREADS */
|
|
if ((tmp = pad_findmy(PL_tokenbuf)) != NOT_IN_PAD) {
|
|
/* if it's a sort block and they're naming $a or $b */
|
|
if (PL_last_lop_op == OP_SORT &&
|
|
PL_tokenbuf[0] == '$' &&
|
|
(PL_tokenbuf[1] == 'a' || PL_tokenbuf[1] == 'b')
|
|
&& !PL_tokenbuf[2])
|
|
{
|
|
for (d = PL_in_eval ? PL_oldoldbufptr : PL_linestart;
|
|
d < PL_bufend && *d != '\n';
|
|
d++)
|
|
{
|
|
if (strnEQ(d,"<=>",3) || strnEQ(d,"cmp",3)) {
|
|
croak("Can't use \"my %s\" in sort comparison",
|
|
PL_tokenbuf);
|
|
}
|
|
}
|
|
}
|
|
|
|
yylval.opval = newOP(OP_PADANY, 0);
|
|
yylval.opval->op_targ = tmp;
|
|
return PRIVATEREF;
|
|
}
|
|
}
|
|
|
|
/*
|
|
Whine if they've said @foo in a doublequoted string,
|
|
and @foo isn't a variable we can find in the symbol
|
|
table.
|
|
*/
|
|
if (pit == '@' && PL_lex_state != LEX_NORMAL && !PL_lex_brackets) {
|
|
GV *gv = gv_fetchpv(PL_tokenbuf+1, FALSE, SVt_PVAV);
|
|
if (!gv || ((PL_tokenbuf[0] == '@') ? !GvAV(gv) : !GvHV(gv)))
|
|
yyerror(form("In string, %s now must be written as \\%s",
|
|
PL_tokenbuf, PL_tokenbuf));
|
|
}
|
|
|
|
/* build ops for a bareword */
|
|
yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf+1, 0));
|
|
yylval.opval->op_private = OPpCONST_ENTERED;
|
|
gv_fetchpv(PL_tokenbuf+1, PL_in_eval ? (GV_ADDMULTI | GV_ADDINEVAL) : TRUE,
|
|
((PL_tokenbuf[0] == '$') ? SVt_PV
|
|
: (PL_tokenbuf[0] == '@') ? SVt_PVAV
|
|
: SVt_PVHV));
|
|
return WORD;
|
|
}
|
|
|
|
/* no identifier pending identification */
|
|
|
|
switch (PL_lex_state) {
|
|
#ifdef COMMENTARY
|
|
case LEX_NORMAL: /* Some compilers will produce faster */
|
|
case LEX_INTERPNORMAL: /* code if we comment these out. */
|
|
break;
|
|
#endif
|
|
|
|
/* when we're already built the next token, just pull it out the queue */
|
|
case LEX_KNOWNEXT:
|
|
PL_nexttoke--;
|
|
yylval = PL_nextval[PL_nexttoke];
|
|
if (!PL_nexttoke) {
|
|
PL_lex_state = PL_lex_defer;
|
|
PL_expect = PL_lex_expect;
|
|
PL_lex_defer = LEX_NORMAL;
|
|
}
|
|
return(PL_nexttype[PL_nexttoke]);
|
|
|
|
/* interpolated case modifiers like \L \U, including \Q and \E.
|
|
when we get here, PL_bufptr is at the \
|
|
*/
|
|
case LEX_INTERPCASEMOD:
|
|
#ifdef DEBUGGING
|
|
if (PL_bufptr != PL_bufend && *PL_bufptr != '\\')
|
|
croak("panic: INTERPCASEMOD");
|
|
#endif
|
|
/* handle \E or end of string */
|
|
if (PL_bufptr == PL_bufend || PL_bufptr[1] == 'E') {
|
|
char oldmod;
|
|
|
|
/* if at a \E */
|
|
if (PL_lex_casemods) {
|
|
oldmod = PL_lex_casestack[--PL_lex_casemods];
|
|
PL_lex_casestack[PL_lex_casemods] = '\0';
|
|
|
|
if (PL_bufptr != PL_bufend && strchr("LUQ", oldmod)) {
|
|
PL_bufptr += 2;
|
|
PL_lex_state = LEX_INTERPCONCAT;
|
|
}
|
|
return ')';
|
|
}
|
|
if (PL_bufptr != PL_bufend)
|
|
PL_bufptr += 2;
|
|
PL_lex_state = LEX_INTERPCONCAT;
|
|
return yylex();
|
|
}
|
|
else {
|
|
s = PL_bufptr + 1;
|
|
if (strnEQ(s, "L\\u", 3) || strnEQ(s, "U\\l", 3))
|
|
tmp = *s, *s = s[2], s[2] = tmp; /* misordered... */
|
|
if (strchr("LU", *s) &&
|
|
(strchr(PL_lex_casestack, 'L') || strchr(PL_lex_casestack, 'U')))
|
|
{
|
|
PL_lex_casestack[--PL_lex_casemods] = '\0';
|
|
return ')';
|
|
}
|
|
if (PL_lex_casemods > 10) {
|
|
char* newlb = Renew(PL_lex_casestack, PL_lex_casemods + 2, char);
|
|
if (newlb != PL_lex_casestack) {
|
|
SAVEFREEPV(newlb);
|
|
PL_lex_casestack = newlb;
|
|
}
|
|
}
|
|
PL_lex_casestack[PL_lex_casemods++] = *s;
|
|
PL_lex_casestack[PL_lex_casemods] = '\0';
|
|
PL_lex_state = LEX_INTERPCONCAT;
|
|
PL_nextval[PL_nexttoke].ival = 0;
|
|
force_next('(');
|
|
if (*s == 'l')
|
|
PL_nextval[PL_nexttoke].ival = OP_LCFIRST;
|
|
else if (*s == 'u')
|
|
PL_nextval[PL_nexttoke].ival = OP_UCFIRST;
|
|
else if (*s == 'L')
|
|
PL_nextval[PL_nexttoke].ival = OP_LC;
|
|
else if (*s == 'U')
|
|
PL_nextval[PL_nexttoke].ival = OP_UC;
|
|
else if (*s == 'Q')
|
|
PL_nextval[PL_nexttoke].ival = OP_QUOTEMETA;
|
|
else
|
|
croak("panic: yylex");
|
|
PL_bufptr = s + 1;
|
|
force_next(FUNC);
|
|
if (PL_lex_starts) {
|
|
s = PL_bufptr;
|
|
PL_lex_starts = 0;
|
|
Aop(OP_CONCAT);
|
|
}
|
|
else
|
|
return yylex();
|
|
}
|
|
|
|
case LEX_INTERPPUSH:
|
|
return sublex_push();
|
|
|
|
case LEX_INTERPSTART:
|
|
if (PL_bufptr == PL_bufend)
|
|
return sublex_done();
|
|
PL_expect = XTERM;
|
|
PL_lex_dojoin = (*PL_bufptr == '@');
|
|
PL_lex_state = LEX_INTERPNORMAL;
|
|
if (PL_lex_dojoin) {
|
|
PL_nextval[PL_nexttoke].ival = 0;
|
|
force_next(',');
|
|
#ifdef USE_THREADS
|
|
PL_nextval[PL_nexttoke].opval = newOP(OP_THREADSV, 0);
|
|
PL_nextval[PL_nexttoke].opval->op_targ = find_threadsv("\"");
|
|
force_next(PRIVATEREF);
|
|
#else
|
|
force_ident("\"", '$');
|
|
#endif /* USE_THREADS */
|
|
PL_nextval[PL_nexttoke].ival = 0;
|
|
force_next('$');
|
|
PL_nextval[PL_nexttoke].ival = 0;
|
|
force_next('(');
|
|
PL_nextval[PL_nexttoke].ival = OP_JOIN; /* emulate join($", ...) */
|
|
force_next(FUNC);
|
|
}
|
|
if (PL_lex_starts++) {
|
|
s = PL_bufptr;
|
|
Aop(OP_CONCAT);
|
|
}
|
|
return yylex();
|
|
|
|
case LEX_INTERPENDMAYBE:
|
|
if (intuit_more(PL_bufptr)) {
|
|
PL_lex_state = LEX_INTERPNORMAL; /* false alarm, more expr */
|
|
break;
|
|
}
|
|
/* FALL THROUGH */
|
|
|
|
case LEX_INTERPEND:
|
|
if (PL_lex_dojoin) {
|
|
PL_lex_dojoin = FALSE;
|
|
PL_lex_state = LEX_INTERPCONCAT;
|
|
return ')';
|
|
}
|
|
/* FALLTHROUGH */
|
|
case LEX_INTERPCONCAT:
|
|
#ifdef DEBUGGING
|
|
if (PL_lex_brackets)
|
|
croak("panic: INTERPCONCAT");
|
|
#endif
|
|
if (PL_bufptr == PL_bufend)
|
|
return sublex_done();
|
|
|
|
if (SvIVX(PL_linestr) == '\'') {
|
|
SV *sv = newSVsv(PL_linestr);
|
|
if (!PL_lex_inpat)
|
|
sv = tokeq(sv);
|
|
else if ( PL_hints & HINT_NEW_RE )
|
|
sv = new_constant(NULL, 0, "qr", sv, sv, "q");
|
|
yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
|
|
s = PL_bufend;
|
|
}
|
|
else {
|
|
s = scan_const(PL_bufptr);
|
|
if (*s == '\\')
|
|
PL_lex_state = LEX_INTERPCASEMOD;
|
|
else
|
|
PL_lex_state = LEX_INTERPSTART;
|
|
}
|
|
|
|
if (s != PL_bufptr) {
|
|
PL_nextval[PL_nexttoke] = yylval;
|
|
PL_expect = XTERM;
|
|
force_next(THING);
|
|
if (PL_lex_starts++)
|
|
Aop(OP_CONCAT);
|
|
else {
|
|
PL_bufptr = s;
|
|
return yylex();
|
|
}
|
|
}
|
|
|
|
return yylex();
|
|
case LEX_FORMLINE:
|
|
PL_lex_state = LEX_NORMAL;
|
|
s = scan_formline(PL_bufptr);
|
|
if (!PL_lex_formbrack)
|
|
goto rightbracket;
|
|
OPERATOR(';');
|
|
}
|
|
|
|
s = PL_bufptr;
|
|
PL_oldoldbufptr = PL_oldbufptr;
|
|
PL_oldbufptr = s;
|
|
DEBUG_p( {
|
|
PerlIO_printf(PerlIO_stderr(), "### Tokener expecting %s at %s\n", exp_name[PL_expect], s);
|
|
} )
|
|
|
|
retry:
|
|
switch (*s) {
|
|
default:
|
|
croak("Unrecognized character \\%03o", *s & 255);
|
|
case 4:
|
|
case 26:
|
|
goto fake_eof; /* emulate EOF on ^D or ^Z */
|
|
case 0:
|
|
if (!PL_rsfp) {
|
|
PL_last_uni = 0;
|
|
PL_last_lop = 0;
|
|
if (PL_lex_brackets)
|
|
yyerror("Missing right bracket");
|
|
TOKEN(0);
|
|
}
|
|
if (s++ < PL_bufend)
|
|
goto retry; /* ignore stray nulls */
|
|
PL_last_uni = 0;
|
|
PL_last_lop = 0;
|
|
if (!PL_in_eval && !PL_preambled) {
|
|
PL_preambled = TRUE;
|
|
sv_setpv(PL_linestr,incl_perldb());
|
|
if (SvCUR(PL_linestr))
|
|
sv_catpv(PL_linestr,";");
|
|
if (PL_preambleav){
|
|
while(AvFILLp(PL_preambleav) >= 0) {
|
|
SV *tmpsv = av_shift(PL_preambleav);
|
|
sv_catsv(PL_linestr, tmpsv);
|
|
sv_catpv(PL_linestr, ";");
|
|
sv_free(tmpsv);
|
|
}
|
|
sv_free((SV*)PL_preambleav);
|
|
PL_preambleav = NULL;
|
|
}
|
|
if (PL_minus_n || PL_minus_p) {
|
|
sv_catpv(PL_linestr, "LINE: while (<>) {");
|
|
if (PL_minus_l)
|
|
sv_catpv(PL_linestr,"chomp;");
|
|
if (PL_minus_a) {
|
|
GV* gv = gv_fetchpv("::F", TRUE, SVt_PVAV);
|
|
if (gv)
|
|
GvIMPORTED_AV_on(gv);
|
|
if (PL_minus_F) {
|
|
if (strchr("/'\"", *PL_splitstr)
|
|
&& strchr(PL_splitstr + 1, *PL_splitstr))
|
|
sv_catpvf(PL_linestr, "@F=split(%s);", PL_splitstr);
|
|
else {
|
|
char delim;
|
|
s = "'~#\200\1'"; /* surely one char is unused...*/
|
|
while (s[1] && strchr(PL_splitstr, *s)) s++;
|
|
delim = *s;
|
|
sv_catpvf(PL_linestr, "@F=split(%s%c",
|
|
"q" + (delim == '\''), delim);
|
|
for (s = PL_splitstr; *s; s++) {
|
|
if (*s == '\\')
|
|
sv_catpvn(PL_linestr, "\\", 1);
|
|
sv_catpvn(PL_linestr, s, 1);
|
|
}
|
|
sv_catpvf(PL_linestr, "%c);", delim);
|
|
}
|
|
}
|
|
else
|
|
sv_catpv(PL_linestr,"@F=split(' ');");
|
|
}
|
|
}
|
|
sv_catpv(PL_linestr, "\n");
|
|
PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
|
|
PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
|
|
if (PERLDB_LINE && PL_curstash != PL_debstash) {
|
|
SV *sv = NEWSV(85,0);
|
|
|
|
sv_upgrade(sv, SVt_PVMG);
|
|
sv_setsv(sv,PL_linestr);
|
|
av_store(GvAV(PL_curcop->cop_filegv),(I32)PL_curcop->cop_line,sv);
|
|
}
|
|
goto retry;
|
|
}
|
|
do {
|
|
if ((s = filter_gets(PL_linestr, PL_rsfp, 0)) == Nullch) {
|
|
fake_eof:
|
|
if (PL_rsfp) {
|
|
if (PL_preprocess && !PL_in_eval)
|
|
(void)PerlProc_pclose(PL_rsfp);
|
|
else if ((PerlIO *)PL_rsfp == PerlIO_stdin())
|
|
PerlIO_clearerr(PL_rsfp);
|
|
else
|
|
(void)PerlIO_close(PL_rsfp);
|
|
PL_rsfp = Nullfp;
|
|
PL_doextract = FALSE;
|
|
}
|
|
if (!PL_in_eval && (PL_minus_n || PL_minus_p)) {
|
|
sv_setpv(PL_linestr,PL_minus_p ? ";}continue{print" : "");
|
|
sv_catpv(PL_linestr,";}");
|
|
PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
|
|
PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
|
|
PL_minus_n = PL_minus_p = 0;
|
|
goto retry;
|
|
}
|
|
PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
|
|
sv_setpv(PL_linestr,"");
|
|
TOKEN(';'); /* not infinite loop because rsfp is NULL now */
|
|
}
|
|
if (PL_doextract) {
|
|
if (*s == '#' && s[1] == '!' && instr(s,"perl"))
|
|
PL_doextract = FALSE;
|
|
|
|
/* Incest with pod. */
|
|
if (*s == '=' && strnEQ(s, "=cut", 4)) {
|
|
sv_setpv(PL_linestr, "");
|
|
PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
|
|
PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
|
|
PL_doextract = FALSE;
|
|
}
|
|
}
|
|
incline(s);
|
|
} while (PL_doextract);
|
|
PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = s;
|
|
if (PERLDB_LINE && PL_curstash != PL_debstash) {
|
|
SV *sv = NEWSV(85,0);
|
|
|
|
sv_upgrade(sv, SVt_PVMG);
|
|
sv_setsv(sv,PL_linestr);
|
|
av_store(GvAV(PL_curcop->cop_filegv),(I32)PL_curcop->cop_line,sv);
|
|
}
|
|
PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
|
|
if (PL_curcop->cop_line == 1) {
|
|
while (s < PL_bufend && isSPACE(*s))
|
|
s++;
|
|
if (*s == ':' && s[1] != ':') /* for csh execing sh scripts */
|
|
s++;
|
|
d = Nullch;
|
|
if (!PL_in_eval) {
|
|
if (*s == '#' && *(s+1) == '!')
|
|
d = s + 2;
|
|
#ifdef ALTERNATE_SHEBANG
|
|
else {
|
|
static char as[] = ALTERNATE_SHEBANG;
|
|
if (*s == as[0] && strnEQ(s, as, sizeof(as) - 1))
|
|
d = s + (sizeof(as) - 1);
|
|
}
|
|
#endif /* ALTERNATE_SHEBANG */
|
|
}
|
|
if (d) {
|
|
char *ipath;
|
|
char *ipathend;
|
|
|
|
while (isSPACE(*d))
|
|
d++;
|
|
ipath = d;
|
|
while (*d && !isSPACE(*d))
|
|
d++;
|
|
ipathend = d;
|
|
|
|
#ifdef ARG_ZERO_IS_SCRIPT
|
|
if (ipathend > ipath) {
|
|
/*
|
|
* HP-UX (at least) sets argv[0] to the script name,
|
|
* which makes $^X incorrect. And Digital UNIX and Linux,
|
|
* at least, set argv[0] to the basename of the Perl
|
|
* interpreter. So, having found "#!", we'll set it right.
|
|
*/
|
|
SV *x = GvSV(gv_fetchpv("\030", TRUE, SVt_PV));
|
|
assert(SvPOK(x) || SvGMAGICAL(x));
|
|
if (sv_eq(x, GvSV(PL_curcop->cop_filegv))) {
|
|
sv_setpvn(x, ipath, ipathend - ipath);
|
|
SvSETMAGIC(x);
|
|
}
|
|
TAINT_NOT; /* $^X is always tainted, but that's OK */
|
|
}
|
|
#endif /* ARG_ZERO_IS_SCRIPT */
|
|
|
|
/*
|
|
* Look for options.
|
|
*/
|
|
d = instr(s,"perl -");
|
|
if (!d)
|
|
d = instr(s,"perl");
|
|
#ifdef ALTERNATE_SHEBANG
|
|
/*
|
|
* If the ALTERNATE_SHEBANG on this system starts with a
|
|
* character that can be part of a Perl expression, then if
|
|
* we see it but not "perl", we're probably looking at the
|
|
* start of Perl code, not a request to hand off to some
|
|
* other interpreter. Similarly, if "perl" is there, but
|
|
* not in the first 'word' of the line, we assume the line
|
|
* contains the start of the Perl program.
|
|
*/
|
|
if (d && *s != '#') {
|
|
char *c = ipath;
|
|
while (*c && !strchr("; \t\r\n\f\v#", *c))
|
|
c++;
|
|
if (c < d)
|
|
d = Nullch; /* "perl" not in first word; ignore */
|
|
else
|
|
*s = '#'; /* Don't try to parse shebang line */
|
|
}
|
|
#endif /* ALTERNATE_SHEBANG */
|
|
if (!d &&
|
|
*s == '#' &&
|
|
ipathend > ipath &&
|
|
!PL_minus_c &&
|
|
!instr(s,"indir") &&
|
|
instr(PL_origargv[0],"perl"))
|
|
{
|
|
char **newargv;
|
|
|
|
*ipathend = '\0';
|
|
s = ipathend + 1;
|
|
while (s < PL_bufend && isSPACE(*s))
|
|
s++;
|
|
if (s < PL_bufend) {
|
|
Newz(899,newargv,PL_origargc+3,char*);
|
|
newargv[1] = s;
|
|
while (s < PL_bufend && !isSPACE(*s))
|
|
s++;
|
|
*s = '\0';
|
|
Copy(PL_origargv+1, newargv+2, PL_origargc+1, char*);
|
|
}
|
|
else
|
|
newargv = PL_origargv;
|
|
newargv[0] = ipath;
|
|
PerlProc_execv(ipath, newargv);
|
|
croak("Can't exec %s", ipath);
|
|
}
|
|
if (d) {
|
|
U32 oldpdb = PL_perldb;
|
|
bool oldn = PL_minus_n;
|
|
bool oldp = PL_minus_p;
|
|
|
|
while (*d && !isSPACE(*d)) d++;
|
|
while (*d == ' ' || *d == '\t') d++;
|
|
|
|
if (*d++ == '-') {
|
|
do {
|
|
if (*d == 'M' || *d == 'm') {
|
|
char *m = d;
|
|
while (*d && !isSPACE(*d)) d++;
|
|
croak("Too late for \"-%.*s\" option",
|
|
(int)(d - m), m);
|
|
}
|
|
d = moreswitches(d);
|
|
} while (d);
|
|
if (PERLDB_LINE && !oldpdb ||
|
|
( PL_minus_n || PL_minus_p ) && !(oldn || oldp) )
|
|
/* if we have already added "LINE: while (<>) {",
|
|
we must not do it again */
|
|
{
|
|
sv_setpv(PL_linestr, "");
|
|
PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = SvPVX(PL_linestr);
|
|
PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
|
|
PL_preambled = FALSE;
|
|
if (PERLDB_LINE)
|
|
(void)gv_fetchfile(PL_origfilename);
|
|
goto retry;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
|
|
PL_bufptr = s;
|
|
PL_lex_state = LEX_FORMLINE;
|
|
return yylex();
|
|
}
|
|
goto retry;
|
|
case '\r':
|
|
#ifdef PERL_STRICT_CR
|
|
warn("Illegal character \\%03o (carriage return)", '\r');
|
|
croak(
|
|
"(Maybe you didn't strip carriage returns after a network transfer?)\n");
|
|
#endif
|
|
case ' ': case '\t': case '\f': case 013:
|
|
s++;
|
|
goto retry;
|
|
case '#':
|
|
case '\n':
|
|
if (PL_lex_state != LEX_NORMAL || (PL_in_eval && !PL_rsfp)) {
|
|
d = PL_bufend;
|
|
while (s < d && *s != '\n')
|
|
s++;
|
|
if (s < d)
|
|
s++;
|
|
incline(s);
|
|
if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
|
|
PL_bufptr = s;
|
|
PL_lex_state = LEX_FORMLINE;
|
|
return yylex();
|
|
}
|
|
}
|
|
else {
|
|
*s = '\0';
|
|
PL_bufend = s;
|
|
}
|
|
goto retry;
|
|
case '-':
|
|
if (s[1] && isALPHA(s[1]) && !isALNUM(s[2])) {
|
|
s++;
|
|
PL_bufptr = s;
|
|
tmp = *s++;
|
|
|
|
while (s < PL_bufend && (*s == ' ' || *s == '\t'))
|
|
s++;
|
|
|
|
if (strnEQ(s,"=>",2)) {
|
|
s = force_word(PL_bufptr,WORD,FALSE,FALSE,FALSE);
|
|
OPERATOR('-'); /* unary minus */
|
|
}
|
|
PL_last_uni = PL_oldbufptr;
|
|
PL_last_lop_op = OP_FTEREAD; /* good enough */
|
|
switch (tmp) {
|
|
case 'r': FTST(OP_FTEREAD);
|
|
case 'w': FTST(OP_FTEWRITE);
|
|
case 'x': FTST(OP_FTEEXEC);
|
|
case 'o': FTST(OP_FTEOWNED);
|
|
case 'R': FTST(OP_FTRREAD);
|
|
case 'W': FTST(OP_FTRWRITE);
|
|
case 'X': FTST(OP_FTREXEC);
|
|
case 'O': FTST(OP_FTROWNED);
|
|
case 'e': FTST(OP_FTIS);
|
|
case 'z': FTST(OP_FTZERO);
|
|
case 's': FTST(OP_FTSIZE);
|
|
case 'f': FTST(OP_FTFILE);
|
|
case 'd': FTST(OP_FTDIR);
|
|
case 'l': FTST(OP_FTLINK);
|
|
case 'p': FTST(OP_FTPIPE);
|
|
case 'S': FTST(OP_FTSOCK);
|
|
case 'u': FTST(OP_FTSUID);
|
|
case 'g': FTST(OP_FTSGID);
|
|
case 'k': FTST(OP_FTSVTX);
|
|
case 'b': FTST(OP_FTBLK);
|
|
case 'c': FTST(OP_FTCHR);
|
|
case 't': FTST(OP_FTTTY);
|
|
case 'T': FTST(OP_FTTEXT);
|
|
case 'B': FTST(OP_FTBINARY);
|
|
case 'M': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTMTIME);
|
|
case 'A': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTATIME);
|
|
case 'C': gv_fetchpv("\024",TRUE, SVt_PV); FTST(OP_FTCTIME);
|
|
default:
|
|
croak("Unrecognized file test: -%c", (int)tmp);
|
|
break;
|
|
}
|
|
}
|
|
tmp = *s++;
|
|
if (*s == tmp) {
|
|
s++;
|
|
if (PL_expect == XOPERATOR)
|
|
TERM(POSTDEC);
|
|
else
|
|
OPERATOR(PREDEC);
|
|
}
|
|
else if (*s == '>') {
|
|
s++;
|
|
s = skipspace(s);
|
|
if (isIDFIRST(*s)) {
|
|
s = force_word(s,METHOD,FALSE,TRUE,FALSE);
|
|
TOKEN(ARROW);
|
|
}
|
|
else if (*s == '$')
|
|
OPERATOR(ARROW);
|
|
else
|
|
TERM(ARROW);
|
|
}
|
|
if (PL_expect == XOPERATOR)
|
|
Aop(OP_SUBTRACT);
|
|
else {
|
|
if (isSPACE(*s) || !isSPACE(*PL_bufptr))
|
|
check_uni();
|
|
OPERATOR('-'); /* unary minus */
|
|
}
|
|
|
|
case '+':
|
|
tmp = *s++;
|
|
if (*s == tmp) {
|
|
s++;
|
|
if (PL_expect == XOPERATOR)
|
|
TERM(POSTINC);
|
|
else
|
|
OPERATOR(PREINC);
|
|
}
|
|
if (PL_expect == XOPERATOR)
|
|
Aop(OP_ADD);
|
|
else {
|
|
if (isSPACE(*s) || !isSPACE(*PL_bufptr))
|
|
check_uni();
|
|
OPERATOR('+');
|
|
}
|
|
|
|
case '*':
|
|
if (PL_expect != XOPERATOR) {
|
|
s = scan_ident(s, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
|
|
PL_expect = XOPERATOR;
|
|
force_ident(PL_tokenbuf, '*');
|
|
if (!*PL_tokenbuf)
|
|
PREREF('*');
|
|
TERM('*');
|
|
}
|
|
s++;
|
|
if (*s == '*') {
|
|
s++;
|
|
PWop(OP_POW);
|
|
}
|
|
Mop(OP_MULTIPLY);
|
|
|
|
case '%':
|
|
if (PL_expect == XOPERATOR) {
|
|
++s;
|
|
Mop(OP_MODULO);
|
|
}
|
|
PL_tokenbuf[0] = '%';
|
|
s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, TRUE);
|
|
if (!PL_tokenbuf[1]) {
|
|
if (s == PL_bufend)
|
|
yyerror("Final % should be \\% or %name");
|
|
PREREF('%');
|
|
}
|
|
PL_pending_ident = '%';
|
|
TERM('%');
|
|
|
|
case '^':
|
|
s++;
|
|
BOop(OP_BIT_XOR);
|
|
case '[':
|
|
PL_lex_brackets++;
|
|
/* FALL THROUGH */
|
|
case '~':
|
|
case ',':
|
|
tmp = *s++;
|
|
OPERATOR(tmp);
|
|
case ':':
|
|
if (s[1] == ':') {
|
|
len = 0;
|
|
goto just_a_word;
|
|
}
|
|
s++;
|
|
OPERATOR(':');
|
|
case '(':
|
|
s++;
|
|
if (PL_last_lop == PL_oldoldbufptr || PL_last_uni == PL_oldoldbufptr)
|
|
PL_oldbufptr = PL_oldoldbufptr; /* allow print(STDOUT 123) */
|
|
else
|
|
PL_expect = XTERM;
|
|
TOKEN('(');
|
|
case ';':
|
|
if (PL_curcop->cop_line < PL_copline)
|
|
PL_copline = PL_curcop->cop_line;
|
|
tmp = *s++;
|
|
OPERATOR(tmp);
|
|
case ')':
|
|
tmp = *s++;
|
|
s = skipspace(s);
|
|
if (*s == '{')
|
|
PREBLOCK(tmp);
|
|
TERM(tmp);
|
|
case ']':
|
|
s++;
|
|
if (PL_lex_brackets <= 0)
|
|
yyerror("Unmatched right bracket");
|
|
else
|
|
--PL_lex_brackets;
|
|
if (PL_lex_state == LEX_INTERPNORMAL) {
|
|
if (PL_lex_brackets == 0) {
|
|
if (*s != '[' && *s != '{' && (*s != '-' || s[1] != '>'))
|
|
PL_lex_state = LEX_INTERPEND;
|
|
}
|
|
}
|
|
TERM(']');
|
|
case '{':
|
|
leftbracket:
|
|
s++;
|
|
if (PL_lex_brackets > 100) {
|
|
char* newlb = Renew(PL_lex_brackstack, PL_lex_brackets + 1, char);
|
|
if (newlb != PL_lex_brackstack) {
|
|
SAVEFREEPV(newlb);
|
|
PL_lex_brackstack = newlb;
|
|
}
|
|
}
|
|
switch (PL_expect) {
|
|
case XTERM:
|
|
if (PL_lex_formbrack) {
|
|
s--;
|
|
PRETERMBLOCK(DO);
|
|
}
|
|
if (PL_oldoldbufptr == PL_last_lop)
|
|
PL_lex_brackstack[PL_lex_brackets++] = XTERM;
|
|
else
|
|
PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
|
|
OPERATOR(HASHBRACK);
|
|
case XOPERATOR:
|
|
while (s < PL_bufend && (*s == ' ' || *s == '\t'))
|
|
s++;
|
|
d = s;
|
|
PL_tokenbuf[0] = '\0';
|
|
if (d < PL_bufend && *d == '-') {
|
|
PL_tokenbuf[0] = '-';
|
|
d++;
|
|
while (d < PL_bufend && (*d == ' ' || *d == '\t'))
|
|
d++;
|
|
}
|
|
if (d < PL_bufend && isIDFIRST(*d)) {
|
|
d = scan_word(d, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
|
|
FALSE, &len);
|
|
while (d < PL_bufend && (*d == ' ' || *d == '\t'))
|
|
d++;
|
|
if (*d == '}') {
|
|
char minus = (PL_tokenbuf[0] == '-');
|
|
s = force_word(s + minus, WORD, FALSE, TRUE, FALSE);
|
|
if (minus)
|
|
force_next('-');
|
|
}
|
|
}
|
|
/* FALL THROUGH */
|
|
case XBLOCK:
|
|
PL_lex_brackstack[PL_lex_brackets++] = XSTATE;
|
|
PL_expect = XSTATE;
|
|
break;
|
|
case XTERMBLOCK:
|
|
PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
|
|
PL_expect = XSTATE;
|
|
break;
|
|
default: {
|
|
char *t;
|
|
if (PL_oldoldbufptr == PL_last_lop)
|
|
PL_lex_brackstack[PL_lex_brackets++] = XTERM;
|
|
else
|
|
PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
|
|
s = skipspace(s);
|
|
if (*s == '}')
|
|
OPERATOR(HASHBRACK);
|
|
/* This hack serves to disambiguate a pair of curlies
|
|
* as being a block or an anon hash. Normally, expectation
|
|
* determines that, but in cases where we're not in a
|
|
* position to expect anything in particular (like inside
|
|
* eval"") we have to resolve the ambiguity. This code
|
|
* covers the case where the first term in the curlies is a
|
|
* quoted string. Most other cases need to be explicitly
|
|
* disambiguated by prepending a `+' before the opening
|
|
* curly in order to force resolution as an anon hash.
|
|
*
|
|
* XXX should probably propagate the outer expectation
|
|
* into eval"" to rely less on this hack, but that could
|
|
* potentially break current behavior of eval"".
|
|
* GSAR 97-07-21
|
|
*/
|
|
t = s;
|
|
if (*s == '\'' || *s == '"' || *s == '`') {
|
|
/* common case: get past first string, handling escapes */
|
|
for (t++; t < PL_bufend && *t != *s;)
|
|
if (*t++ == '\\' && (*t == '\\' || *t == *s))
|
|
t++;
|
|
t++;
|
|
}
|
|
else if (*s == 'q') {
|
|
if (++t < PL_bufend
|
|
&& (!isALNUM(*t)
|
|
|| ((*t == 'q' || *t == 'x') && ++t < PL_bufend
|
|
&& !isALNUM(*t)))) {
|
|
char *tmps;
|
|
char open, close, term;
|
|
I32 brackets = 1;
|
|
|
|
while (t < PL_bufend && isSPACE(*t))
|
|
t++;
|
|
term = *t;
|
|
open = term;
|
|
if (term && (tmps = strchr("([{< )]}> )]}>",term)))
|
|
term = tmps[5];
|
|
close = term;
|
|
if (open == close)
|
|
for (t++; t < PL_bufend; t++) {
|
|
if (*t == '\\' && t+1 < PL_bufend && open != '\\')
|
|
t++;
|
|
else if (*t == open)
|
|
break;
|
|
}
|
|
else
|
|
for (t++; t < PL_bufend; t++) {
|
|
if (*t == '\\' && t+1 < PL_bufend)
|
|
t++;
|
|
else if (*t == close && --brackets <= 0)
|
|
break;
|
|
else if (*t == open)
|
|
brackets++;
|
|
}
|
|
}
|
|
t++;
|
|
}
|
|
else if (isALPHA(*s)) {
|
|
for (t++; t < PL_bufend && isALNUM(*t); t++) ;
|
|
}
|
|
while (t < PL_bufend && isSPACE(*t))
|
|
t++;
|
|
/* if comma follows first term, call it an anon hash */
|
|
/* XXX it could be a comma expression with loop modifiers */
|
|
if (t < PL_bufend && ((*t == ',' && (*s == 'q' || !isLOWER(*s)))
|
|
|| (*t == '=' && t[1] == '>')))
|
|
OPERATOR(HASHBRACK);
|
|
if (PL_expect == XREF)
|
|
PL_expect = XTERM;
|
|
else {
|
|
PL_lex_brackstack[PL_lex_brackets-1] = XSTATE;
|
|
PL_expect = XSTATE;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
yylval.ival = PL_curcop->cop_line;
|
|
if (isSPACE(*s) || *s == '#')
|
|
PL_copline = NOLINE; /* invalidate current command line number */
|
|
TOKEN('{');
|
|
case '}':
|
|
rightbracket:
|
|
s++;
|
|
if (PL_lex_brackets <= 0)
|
|
yyerror("Unmatched right bracket");
|
|
else
|
|
PL_expect = (expectation)PL_lex_brackstack[--PL_lex_brackets];
|
|
if (PL_lex_brackets < PL_lex_formbrack)
|
|
PL_lex_formbrack = 0;
|
|
if (PL_lex_state == LEX_INTERPNORMAL) {
|
|
if (PL_lex_brackets == 0) {
|
|
if (PL_lex_fakebrack) {
|
|
PL_lex_state = LEX_INTERPEND;
|
|
PL_bufptr = s;
|
|
return yylex(); /* ignore fake brackets */
|
|
}
|
|
if (*s == '-' && s[1] == '>')
|
|
PL_lex_state = LEX_INTERPENDMAYBE;
|
|
else if (*s != '[' && *s != '{')
|
|
PL_lex_state = LEX_INTERPEND;
|
|
}
|
|
}
|
|
if (PL_lex_brackets < PL_lex_fakebrack) {
|
|
PL_bufptr = s;
|
|
PL_lex_fakebrack = 0;
|
|
return yylex(); /* ignore fake brackets */
|
|
}
|
|
force_next('}');
|
|
TOKEN(';');
|
|
case '&':
|
|
s++;
|
|
tmp = *s++;
|
|
if (tmp == '&')
|
|
AOPERATOR(ANDAND);
|
|
s--;
|
|
if (PL_expect == XOPERATOR) {
|
|
if (PL_dowarn && isALPHA(*s) && PL_bufptr == PL_linestart) {
|
|
PL_curcop->cop_line--;
|
|
warn(warn_nosemi);
|
|
PL_curcop->cop_line++;
|
|
}
|
|
BAop(OP_BIT_AND);
|
|
}
|
|
|
|
s = scan_ident(s - 1, PL_bufend, PL_tokenbuf, sizeof PL_tokenbuf, TRUE);
|
|
if (*PL_tokenbuf) {
|
|
PL_expect = XOPERATOR;
|
|
force_ident(PL_tokenbuf, '&');
|
|
}
|
|
else
|
|
PREREF('&');
|
|
yylval.ival = (OPpENTERSUB_AMPER<<8);
|
|
TERM('&');
|
|
|
|
case '|':
|
|
s++;
|
|
tmp = *s++;
|
|
if (tmp == '|')
|
|
AOPERATOR(OROR);
|
|
s--;
|
|
BOop(OP_BIT_OR);
|
|
case '=':
|
|
s++;
|
|
tmp = *s++;
|
|
if (tmp == '=')
|
|
Eop(OP_EQ);
|
|
if (tmp == '>')
|
|
OPERATOR(',');
|
|
if (tmp == '~')
|
|
PMop(OP_MATCH);
|
|
if (PL_dowarn && tmp && isSPACE(*s) && strchr("+-*/%.^&|<",tmp))
|
|
warn("Reversed %c= operator",(int)tmp);
|
|
s--;
|
|
if (PL_expect == XSTATE && isALPHA(tmp) &&
|
|
(s == PL_linestart+1 || s[-2] == '\n') )
|
|
{
|
|
if (PL_in_eval && !PL_rsfp) {
|
|
d = PL_bufend;
|
|
while (s < d) {
|
|
if (*s++ == '\n') {
|
|
incline(s);
|
|
if (strnEQ(s,"=cut",4)) {
|
|
s = strchr(s,'\n');
|
|
if (s)
|
|
s++;
|
|
else
|
|
s = d;
|
|
incline(s);
|
|
goto retry;
|
|
}
|
|
}
|
|
}
|
|
goto retry;
|
|
}
|
|
s = PL_bufend;
|
|
PL_doextract = TRUE;
|
|
goto retry;
|
|
}
|
|
if (PL_lex_brackets < PL_lex_formbrack) {
|
|
char *t;
|
|
#ifdef PERL_STRICT_CR
|
|
for (t = s; *t == ' ' || *t == '\t'; t++) ;
|
|
#else
|
|
for (t = s; *t == ' ' || *t == '\t' || *t == '\r'; t++) ;
|
|
#endif
|
|
if (*t == '\n' || *t == '#') {
|
|
s--;
|
|
PL_expect = XBLOCK;
|
|
goto leftbracket;
|
|
}
|
|
}
|
|
yylval.ival = 0;
|
|
OPERATOR(ASSIGNOP);
|
|
case '!':
|
|
s++;
|
|
tmp = *s++;
|
|
if (tmp == '=')
|
|
Eop(OP_NE);
|
|
if (tmp == '~')
|
|
PMop(OP_NOT);
|
|
s--;
|
|
OPERATOR('!');
|
|
case '<':
|
|
if (PL_expect != XOPERATOR) {
|
|
if (s[1] != '<' && !strchr(s,'>'))
|
|
check_uni();
|
|
if (s[1] == '<')
|
|
s = scan_heredoc(s);
|
|
else
|
|
s = scan_inputsymbol(s);
|
|
TERM(sublex_start());
|
|
}
|
|
s++;
|
|
tmp = *s++;
|
|
if (tmp == '<')
|
|
SHop(OP_LEFT_SHIFT);
|
|
if (tmp == '=') {
|
|
tmp = *s++;
|
|
if (tmp == '>')
|
|
Eop(OP_NCMP);
|
|
s--;
|
|
Rop(OP_LE);
|
|
}
|
|
s--;
|
|
Rop(OP_LT);
|
|
case '>':
|
|
s++;
|
|
tmp = *s++;
|
|
if (tmp == '>')
|
|
SHop(OP_RIGHT_SHIFT);
|
|
if (tmp == '=')
|
|
Rop(OP_GE);
|
|
s--;
|
|
Rop(OP_GT);
|
|
|
|
case '$':
|
|
CLINE;
|
|
|
|
if (PL_expect == XOPERATOR) {
|
|
if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
|
|
PL_expect = XTERM;
|
|
depcom();
|
|
return ','; /* grandfather non-comma-format format */
|
|
}
|
|
}
|
|
|
|
if (s[1] == '#' && (isALPHA(s[2]) || strchr("_{$:", s[2]))) {
|
|
if (PL_expect == XOPERATOR)
|
|
no_op("Array length", PL_bufptr);
|
|
PL_tokenbuf[0] = '@';
|
|
s = scan_ident(s + 1, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1,
|
|
FALSE);
|
|
if (!PL_tokenbuf[1])
|
|
PREREF(DOLSHARP);
|
|
PL_expect = XOPERATOR;
|
|
PL_pending_ident = '#';
|
|
TOKEN(DOLSHARP);
|
|
}
|
|
|
|
if (PL_expect == XOPERATOR)
|
|
no_op("Scalar", PL_bufptr);
|
|
PL_tokenbuf[0] = '$';
|
|
s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
|
|
if (!PL_tokenbuf[1]) {
|
|
if (s == PL_bufend)
|
|
yyerror("Final $ should be \\$ or $name");
|
|
PREREF('$');
|
|
}
|
|
|
|
/* This kludge not intended to be bulletproof. */
|
|
if (PL_tokenbuf[1] == '[' && !PL_tokenbuf[2]) {
|
|
yylval.opval = newSVOP(OP_CONST, 0,
|
|
newSViv((IV)PL_compiling.cop_arybase));
|
|
yylval.opval->op_private = OPpCONST_ARYBASE;
|
|
TERM(THING);
|
|
}
|
|
|
|
d = s;
|
|
if (PL_lex_state == LEX_NORMAL)
|
|
s = skipspace(s);
|
|
|
|
if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
|
|
char *t;
|
|
if (*s == '[') {
|
|
PL_tokenbuf[0] = '@';
|
|
if (PL_dowarn) {
|
|
for(t = s + 1;
|
|
isSPACE(*t) || isALNUM(*t) || *t == '$';
|
|
t++) ;
|
|
if (*t++ == ',') {
|
|
PL_bufptr = skipspace(PL_bufptr);
|
|
while (t < PL_bufend && *t != ']')
|
|
t++;
|
|
warn("Multidimensional syntax %.*s not supported",
|
|
(t - PL_bufptr) + 1, PL_bufptr);
|
|
}
|
|
}
|
|
}
|
|
else if (*s == '{') {
|
|
PL_tokenbuf[0] = '%';
|
|
if (PL_dowarn && strEQ(PL_tokenbuf+1, "SIG") &&
|
|
(t = strchr(s, '}')) && (t = strchr(t, '=')))
|
|
{
|
|
char tmpbuf[sizeof PL_tokenbuf];
|
|
STRLEN len;
|
|
for (t++; isSPACE(*t); t++) ;
|
|
if (isIDFIRST(*t)) {
|
|
t = scan_word(t, tmpbuf, sizeof tmpbuf, TRUE, &len);
|
|
for (; isSPACE(*t); t++) ;
|
|
if (*t == ';' && perl_get_cv(tmpbuf, FALSE))
|
|
warn("You need to quote \"%s\"", tmpbuf);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
PL_expect = XOPERATOR;
|
|
if (PL_lex_state == LEX_NORMAL && isSPACE(*d)) {
|
|
bool islop = (PL_last_lop == PL_oldoldbufptr);
|
|
if (!islop || PL_last_lop_op == OP_GREPSTART)
|
|
PL_expect = XOPERATOR;
|
|
else if (strchr("$@\"'`q", *s))
|
|
PL_expect = XTERM; /* e.g. print $fh "foo" */
|
|
else if (strchr("&*<%", *s) && isIDFIRST(s[1]))
|
|
PL_expect = XTERM; /* e.g. print $fh &sub */
|
|
else if (isIDFIRST(*s)) {
|
|
char tmpbuf[sizeof PL_tokenbuf];
|
|
scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
|
|
if (tmp = keyword(tmpbuf, len)) {
|
|
/* binary operators exclude handle interpretations */
|
|
switch (tmp) {
|
|
case -KEY_x:
|
|
case -KEY_eq:
|
|
case -KEY_ne:
|
|
case -KEY_gt:
|
|
case -KEY_lt:
|
|
case -KEY_ge:
|
|
case -KEY_le:
|
|
case -KEY_cmp:
|
|
break;
|
|
default:
|
|
PL_expect = XTERM; /* e.g. print $fh length() */
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
GV *gv = gv_fetchpv(tmpbuf, FALSE, SVt_PVCV);
|
|
if (gv && GvCVu(gv))
|
|
PL_expect = XTERM; /* e.g. print $fh subr() */
|
|
}
|
|
}
|
|
else if (isDIGIT(*s))
|
|
PL_expect = XTERM; /* e.g. print $fh 3 */
|
|
else if (*s == '.' && isDIGIT(s[1]))
|
|
PL_expect = XTERM; /* e.g. print $fh .3 */
|
|
else if (strchr("/?-+", *s) && !isSPACE(s[1]) && s[1] != '=')
|
|
PL_expect = XTERM; /* e.g. print $fh -1 */
|
|
else if (*s == '<' && s[1] == '<' && !isSPACE(s[2]) && s[2] != '=')
|
|
PL_expect = XTERM; /* print $fh <<"EOF" */
|
|
}
|
|
PL_pending_ident = '$';
|
|
TOKEN('$');
|
|
|
|
case '@':
|
|
if (PL_expect == XOPERATOR)
|
|
no_op("Array", s);
|
|
PL_tokenbuf[0] = '@';
|
|
s = scan_ident(s, PL_bufend, PL_tokenbuf + 1, sizeof PL_tokenbuf - 1, FALSE);
|
|
if (!PL_tokenbuf[1]) {
|
|
if (s == PL_bufend)
|
|
yyerror("Final @ should be \\@ or @name");
|
|
PREREF('@');
|
|
}
|
|
if (PL_lex_state == LEX_NORMAL)
|
|
s = skipspace(s);
|
|
if ((PL_expect != XREF || PL_oldoldbufptr == PL_last_lop) && intuit_more(s)) {
|
|
if (*s == '{')
|
|
PL_tokenbuf[0] = '%';
|
|
|
|
/* Warn about @ where they meant $. */
|
|
if (PL_dowarn) {
|
|
if (*s == '[' || *s == '{') {
|
|
char *t = s + 1;
|
|
while (*t && (isALNUM(*t) || strchr(" \t$#+-'\"", *t)))
|
|
t++;
|
|
if (*t == '}' || *t == ']') {
|
|
t++;
|
|
PL_bufptr = skipspace(PL_bufptr);
|
|
warn("Scalar value %.*s better written as $%.*s",
|
|
t-PL_bufptr, PL_bufptr, t-PL_bufptr-1, PL_bufptr+1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
PL_pending_ident = '@';
|
|
TERM('@');
|
|
|
|
case '/': /* may either be division or pattern */
|
|
case '?': /* may either be conditional or pattern */
|
|
if (PL_expect != XOPERATOR) {
|
|
/* Disable warning on "study /blah/" */
|
|
if (PL_oldoldbufptr == PL_last_uni
|
|
&& (*PL_last_uni != 's' || s - PL_last_uni < 5
|
|
|| memNE(PL_last_uni, "study", 5) || isALNUM(PL_last_uni[5])))
|
|
check_uni();
|
|
s = scan_pat(s,OP_MATCH);
|
|
TERM(sublex_start());
|
|
}
|
|
tmp = *s++;
|
|
if (tmp == '/')
|
|
Mop(OP_DIVIDE);
|
|
OPERATOR(tmp);
|
|
|
|
case '.':
|
|
if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack
|
|
#ifdef PERL_STRICT_CR
|
|
&& s[1] == '\n'
|
|
#else
|
|
&& (s[1] == '\n' || (s[1] == '\r' && s[2] == '\n'))
|
|
#endif
|
|
&& (s == PL_linestart || s[-1] == '\n') )
|
|
{
|
|
PL_lex_formbrack = 0;
|
|
PL_expect = XSTATE;
|
|
goto rightbracket;
|
|
}
|
|
if (PL_expect == XOPERATOR || !isDIGIT(s[1])) {
|
|
tmp = *s++;
|
|
if (*s == tmp) {
|
|
s++;
|
|
if (*s == tmp) {
|
|
s++;
|
|
yylval.ival = OPf_SPECIAL;
|
|
}
|
|
else
|
|
yylval.ival = 0;
|
|
OPERATOR(DOTDOT);
|
|
}
|
|
if (PL_expect != XOPERATOR)
|
|
check_uni();
|
|
Aop(OP_CONCAT);
|
|
}
|
|
/* FALL THROUGH */
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
s = scan_num(s);
|
|
if (PL_expect == XOPERATOR)
|
|
no_op("Number",s);
|
|
TERM(THING);
|
|
|
|
case '\'':
|
|
s = scan_str(s);
|
|
if (PL_expect == XOPERATOR) {
|
|
if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
|
|
PL_expect = XTERM;
|
|
depcom();
|
|
return ','; /* grandfather non-comma-format format */
|
|
}
|
|
else
|
|
no_op("String",s);
|
|
}
|
|
if (!s)
|
|
missingterm((char*)0);
|
|
yylval.ival = OP_CONST;
|
|
TERM(sublex_start());
|
|
|
|
case '"':
|
|
s = scan_str(s);
|
|
if (PL_expect == XOPERATOR) {
|
|
if (PL_lex_formbrack && PL_lex_brackets == PL_lex_formbrack) {
|
|
PL_expect = XTERM;
|
|
depcom();
|
|
return ','; /* grandfather non-comma-format format */
|
|
}
|
|
else
|
|
no_op("String",s);
|
|
}
|
|
if (!s)
|
|
missingterm((char*)0);
|
|
yylval.ival = OP_CONST;
|
|
for (d = SvPV(PL_lex_stuff, len); len; len--, d++) {
|
|
if (*d == '$' || *d == '@' || *d == '\\') {
|
|
yylval.ival = OP_STRINGIFY;
|
|
break;
|
|
}
|
|
}
|
|
TERM(sublex_start());
|
|
|
|
case '`':
|
|
s = scan_str(s);
|
|
if (PL_expect == XOPERATOR)
|
|
no_op("Backticks",s);
|
|
if (!s)
|
|
missingterm((char*)0);
|
|
yylval.ival = OP_BACKTICK;
|
|
set_csh();
|
|
TERM(sublex_start());
|
|
|
|
case '\\':
|
|
s++;
|
|
if (PL_dowarn && PL_lex_inwhat && isDIGIT(*s))
|
|
warn("Can't use \\%c to mean $%c in expression", *s, *s);
|
|
if (PL_expect == XOPERATOR)
|
|
no_op("Backslash",s);
|
|
OPERATOR(REFGEN);
|
|
|
|
case 'x':
|
|
if (isDIGIT(s[1]) && PL_expect == XOPERATOR) {
|
|
s++;
|
|
Mop(OP_REPEAT);
|
|
}
|
|
goto keylookup;
|
|
|
|
case '_':
|
|
case 'a': case 'A':
|
|
case 'b': case 'B':
|
|
case 'c': case 'C':
|
|
case 'd': case 'D':
|
|
case 'e': case 'E':
|
|
case 'f': case 'F':
|
|
case 'g': case 'G':
|
|
case 'h': case 'H':
|
|
case 'i': case 'I':
|
|
case 'j': case 'J':
|
|
case 'k': case 'K':
|
|
case 'l': case 'L':
|
|
case 'm': case 'M':
|
|
case 'n': case 'N':
|
|
case 'o': case 'O':
|
|
case 'p': case 'P':
|
|
case 'q': case 'Q':
|
|
case 'r': case 'R':
|
|
case 's': case 'S':
|
|
case 't': case 'T':
|
|
case 'u': case 'U':
|
|
case 'v': case 'V':
|
|
case 'w': case 'W':
|
|
case 'X':
|
|
case 'y': case 'Y':
|
|
case 'z': case 'Z':
|
|
|
|
keylookup: {
|
|
STRLEN n_a;
|
|
gv = Nullgv;
|
|
gvp = 0;
|
|
|
|
PL_bufptr = s;
|
|
s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
|
|
|
|
/* Some keywords can be followed by any delimiter, including ':' */
|
|
tmp = (len == 1 && strchr("msyq", PL_tokenbuf[0]) ||
|
|
len == 2 && ((PL_tokenbuf[0] == 't' && PL_tokenbuf[1] == 'r') ||
|
|
(PL_tokenbuf[0] == 'q' &&
|
|
strchr("qwxr", PL_tokenbuf[1]))));
|
|
|
|
/* x::* is just a word, unless x is "CORE" */
|
|
if (!tmp && *s == ':' && s[1] == ':' && strNE(PL_tokenbuf, "CORE"))
|
|
goto just_a_word;
|
|
|
|
d = s;
|
|
while (d < PL_bufend && isSPACE(*d))
|
|
d++; /* no comments skipped here, or s### is misparsed */
|
|
|
|
/* Is this a label? */
|
|
if (!tmp && PL_expect == XSTATE
|
|
&& d < PL_bufend && *d == ':' && *(d + 1) != ':') {
|
|
s = d + 1;
|
|
yylval.pval = savepv(PL_tokenbuf);
|
|
CLINE;
|
|
TOKEN(LABEL);
|
|
}
|
|
|
|
/* Check for keywords */
|
|
tmp = keyword(PL_tokenbuf, len);
|
|
|
|
/* Is this a word before a => operator? */
|
|
if (strnEQ(d,"=>",2)) {
|
|
CLINE;
|
|
yylval.opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(PL_tokenbuf,0));
|
|
yylval.opval->op_private = OPpCONST_BARE;
|
|
TERM(WORD);
|
|
}
|
|
|
|
if (tmp < 0) { /* second-class keyword? */
|
|
GV *ogv = Nullgv; /* override (winner) */
|
|
GV *hgv = Nullgv; /* hidden (loser) */
|
|
if (PL_expect != XOPERATOR && (*s != ':' || s[1] != ':')) {
|
|
CV *cv;
|
|
if ((gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV)) &&
|
|
(cv = GvCVu(gv)))
|
|
{
|
|
if (GvIMPORTED_CV(gv))
|
|
ogv = gv;
|
|
else if (! CvMETHOD(cv))
|
|
hgv = gv;
|
|
}
|
|
if (!ogv &&
|
|
(gvp = (GV**)hv_fetch(PL_globalstash,PL_tokenbuf,len,FALSE)) &&
|
|
(gv = *gvp) != (GV*)&PL_sv_undef &&
|
|
GvCVu(gv) && GvIMPORTED_CV(gv))
|
|
{
|
|
ogv = gv;
|
|
}
|
|
}
|
|
if (ogv) {
|
|
tmp = 0; /* overridden by import or by GLOBAL */
|
|
}
|
|
else if (gv && !gvp
|
|
&& -tmp==KEY_lock /* XXX generalizable kludge */
|
|
&& !hv_fetch(GvHVn(PL_incgv), "Thread.pm", 9, FALSE))
|
|
{
|
|
tmp = 0; /* any sub overrides "weak" keyword */
|
|
}
|
|
else { /* no override */
|
|
tmp = -tmp;
|
|
gv = Nullgv;
|
|
gvp = 0;
|
|
if (PL_dowarn && hgv
|
|
&& tmp != KEY_x && tmp != KEY_CORE) /* never ambiguous */
|
|
warn("Ambiguous call resolved as CORE::%s(), %s",
|
|
GvENAME(hgv), "qualify as such or use &");
|
|
}
|
|
}
|
|
|
|
reserved_word:
|
|
switch (tmp) {
|
|
|
|
default: /* not a keyword */
|
|
just_a_word: {
|
|
SV *sv;
|
|
char lastchar = (PL_bufptr == PL_oldoldbufptr ? 0 : PL_bufptr[-1]);
|
|
|
|
/* Get the rest if it looks like a package qualifier */
|
|
|
|
if (*s == '\'' || *s == ':' && s[1] == ':') {
|
|
STRLEN morelen;
|
|
s = scan_word(s, PL_tokenbuf + len, sizeof PL_tokenbuf - len,
|
|
TRUE, &morelen);
|
|
if (!morelen)
|
|
croak("Bad name after %s%s", PL_tokenbuf,
|
|
*s == '\'' ? "'" : "::");
|
|
len += morelen;
|
|
}
|
|
|
|
if (PL_expect == XOPERATOR) {
|
|
if (PL_bufptr == PL_linestart) {
|
|
PL_curcop->cop_line--;
|
|
warn(warn_nosemi);
|
|
PL_curcop->cop_line++;
|
|
}
|
|
else
|
|
no_op("Bareword",s);
|
|
}
|
|
|
|
/* Look for a subroutine with this name in current package,
|
|
unless name is "Foo::", in which case Foo is a bearword
|
|
(and a package name). */
|
|
|
|
if (len > 2 &&
|
|
PL_tokenbuf[len - 2] == ':' && PL_tokenbuf[len - 1] == ':')
|
|
{
|
|
if (PL_dowarn && ! gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVHV))
|
|
warn("Bareword \"%s\" refers to nonexistent package",
|
|
PL_tokenbuf);
|
|
len -= 2;
|
|
PL_tokenbuf[len] = '\0';
|
|
gv = Nullgv;
|
|
gvp = 0;
|
|
}
|
|
else {
|
|
len = 0;
|
|
if (!gv)
|
|
gv = gv_fetchpv(PL_tokenbuf, FALSE, SVt_PVCV);
|
|
}
|
|
|
|
/* if we saw a global override before, get the right name */
|
|
|
|
if (gvp) {
|
|
sv = newSVpv("CORE::GLOBAL::",14);
|
|
sv_catpv(sv,PL_tokenbuf);
|
|
}
|
|
else
|
|
sv = newSVpv(PL_tokenbuf,0);
|
|
|
|
/* Presume this is going to be a bareword of some sort. */
|
|
|
|
CLINE;
|
|
yylval.opval = (OP*)newSVOP(OP_CONST, 0, sv);
|
|
yylval.opval->op_private = OPpCONST_BARE;
|
|
|
|
/* And if "Foo::", then that's what it certainly is. */
|
|
|
|
if (len)
|
|
goto safe_bareword;
|
|
|
|
/* See if it's the indirect object for a list operator. */
|
|
|
|
if (PL_oldoldbufptr &&
|
|
PL_oldoldbufptr < PL_bufptr &&
|
|
(PL_oldoldbufptr == PL_last_lop || PL_oldoldbufptr == PL_last_uni) &&
|
|
/* NO SKIPSPACE BEFORE HERE! */
|
|
(PL_expect == XREF
|
|
|| ((opargs[PL_last_lop_op] >> OASHIFT)& 7) == OA_FILEREF
|
|
|| (PL_last_lop_op == OP_ENTERSUB
|
|
&& PL_last_proto
|
|
&& PL_last_proto[PL_last_proto[0] == ';' ? 1 : 0] == '*')) )
|
|
{
|
|
bool immediate_paren = *s == '(';
|
|
|
|
/* (Now we can afford to cross potential line boundary.) */
|
|
s = skipspace(s);
|
|
|
|
/* Two barewords in a row may indicate method call. */
|
|
|
|
if ((isALPHA(*s) || *s == '$') && (tmp=intuit_method(s,gv)))
|
|
return tmp;
|
|
|
|
/* If not a declared subroutine, it's an indirect object. */
|
|
/* (But it's an indir obj regardless for sort.) */
|
|
|
|
if ((PL_last_lop_op == OP_SORT ||
|
|
(!immediate_paren && (!gv || !GvCVu(gv))) ) &&
|
|
(PL_last_lop_op != OP_MAPSTART && PL_last_lop_op != OP_GREPSTART)){
|
|
PL_expect = (PL_last_lop == PL_oldoldbufptr) ? XTERM : XOPERATOR;
|
|
goto bareword;
|
|
}
|
|
}
|
|
|
|
/* If followed by a paren, it's certainly a subroutine. */
|
|
|
|
PL_expect = XOPERATOR;
|
|
s = skipspace(s);
|
|
if (*s == '(') {
|
|
CLINE;
|
|
if (gv && GvCVu(gv)) {
|
|
CV *cv;
|
|
if ((cv = GvCV(gv)) && SvPOK(cv))
|
|
PL_last_proto = SvPV((SV*)cv, n_a);
|
|
for (d = s + 1; *d == ' ' || *d == '\t'; d++) ;
|
|
if (*d == ')' && (sv = cv_const_sv(cv))) {
|
|
s = d + 1;
|
|
goto its_constant;
|
|
}
|
|
}
|
|
PL_nextval[PL_nexttoke].opval = yylval.opval;
|
|
PL_expect = XOPERATOR;
|
|
force_next(WORD);
|
|
yylval.ival = 0;
|
|
PL_last_lop_op = OP_ENTERSUB;
|
|
TOKEN('&');
|
|
}
|
|
|
|
/* If followed by var or block, call it a method (unless sub) */
|
|
|
|
if ((*s == '$' || *s == '{') && (!gv || !GvCVu(gv))) {
|
|
PL_last_lop = PL_oldbufptr;
|
|
PL_last_lop_op = OP_METHOD;
|
|
PREBLOCK(METHOD);
|
|
}
|
|
|
|
/* If followed by a bareword, see if it looks like indir obj. */
|
|
|
|
if ((isALPHA(*s) || *s == '$') && (tmp = intuit_method(s,gv)))
|
|
return tmp;
|
|
|
|
/* Not a method, so call it a subroutine (if defined) */
|
|
|
|
if (gv && GvCVu(gv)) {
|
|
CV* cv;
|
|
if (lastchar == '-')
|
|
warn("Ambiguous use of -%s resolved as -&%s()",
|
|
PL_tokenbuf, PL_tokenbuf);
|
|
PL_last_lop = PL_oldbufptr;
|
|
PL_last_lop_op = OP_ENTERSUB;
|
|
/* Check for a constant sub */
|
|
cv = GvCV(gv);
|
|
if ((sv = cv_const_sv(cv))) {
|
|
its_constant:
|
|
SvREFCNT_dec(((SVOP*)yylval.opval)->op_sv);
|
|
((SVOP*)yylval.opval)->op_sv = SvREFCNT_inc(sv);
|
|
yylval.opval->op_private = 0;
|
|
TOKEN(WORD);
|
|
}
|
|
|
|
/* Resolve to GV now. */
|
|
op_free(yylval.opval);
|
|
yylval.opval = newCVREF(0, newGVOP(OP_GV, 0, gv));
|
|
PL_last_lop_op = OP_ENTERSUB;
|
|
/* Is there a prototype? */
|
|
if (SvPOK(cv)) {
|
|
STRLEN len;
|
|
PL_last_proto = SvPV((SV*)cv, len);
|
|
if (!len)
|
|
TERM(FUNC0SUB);
|
|
if (strEQ(PL_last_proto, "$"))
|
|
OPERATOR(UNIOPSUB);
|
|
if (*PL_last_proto == '&' && *s == '{') {
|
|
sv_setpv(PL_subname,"__ANON__");
|
|
PREBLOCK(LSTOPSUB);
|
|
}
|
|
} else
|
|
PL_last_proto = NULL;
|
|
PL_nextval[PL_nexttoke].opval = yylval.opval;
|
|
PL_expect = XTERM;
|
|
force_next(WORD);
|
|
TOKEN(NOAMP);
|
|
}
|
|
|
|
if (PL_hints & HINT_STRICT_SUBS &&
|
|
lastchar != '-' &&
|
|
strnNE(s,"->",2) &&
|
|
PL_last_lop_op != OP_TRUNCATE && /* S/F prototype in opcode.pl */
|
|
PL_last_lop_op != OP_ACCEPT &&
|
|
PL_last_lop_op != OP_PIPE_OP &&
|
|
PL_last_lop_op != OP_SOCKPAIR &&
|
|
!(PL_last_lop_op == OP_ENTERSUB
|
|
&& PL_last_proto
|
|
&& PL_last_proto[PL_last_proto[0] == ';' ? 1 : 0] == '*'))
|
|
{
|
|
warn(
|
|
"Bareword \"%s\" not allowed while \"strict subs\" in use",
|
|
PL_tokenbuf);
|
|
++PL_error_count;
|
|
}
|
|
|
|
/* Call it a bare word */
|
|
|
|
bareword:
|
|
if (PL_dowarn) {
|
|
if (lastchar != '-') {
|
|
for (d = PL_tokenbuf; *d && isLOWER(*d); d++) ;
|
|
if (!*d)
|
|
warn(warn_reserved, PL_tokenbuf);
|
|
}
|
|
}
|
|
|
|
safe_bareword:
|
|
if (lastchar && strchr("*%&", lastchar)) {
|
|
warn("Operator or semicolon missing before %c%s",
|
|
lastchar, PL_tokenbuf);
|
|
warn("Ambiguous use of %c resolved as operator %c",
|
|
lastchar, lastchar);
|
|
}
|
|
TOKEN(WORD);
|
|
}
|
|
|
|
case KEY___FILE__:
|
|
yylval.opval = (OP*)newSVOP(OP_CONST, 0,
|
|
newSVsv(GvSV(PL_curcop->cop_filegv)));
|
|
TERM(THING);
|
|
|
|
case KEY___LINE__:
|
|
yylval.opval = (OP*)newSVOP(OP_CONST, 0,
|
|
newSVpvf("%ld", (long)PL_curcop->cop_line));
|
|
TERM(THING);
|
|
|
|
case KEY___PACKAGE__:
|
|
yylval.opval = (OP*)newSVOP(OP_CONST, 0,
|
|
(PL_curstash
|
|
? newSVsv(PL_curstname)
|
|
: &PL_sv_undef));
|
|
TERM(THING);
|
|
|
|
case KEY___DATA__:
|
|
case KEY___END__: {
|
|
GV *gv;
|
|
|
|
/*SUPPRESS 560*/
|
|
if (PL_rsfp && (!PL_in_eval || PL_tokenbuf[2] == 'D')) {
|
|
char *pname = "main";
|
|
if (PL_tokenbuf[2] == 'D')
|
|
pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);
|
|
gv = gv_fetchpv(form("%s::DATA", pname), TRUE, SVt_PVIO);
|
|
GvMULTI_on(gv);
|
|
if (!GvIO(gv))
|
|
GvIOp(gv) = newIO();
|
|
IoIFP(GvIOp(gv)) = PL_rsfp;
|
|
#if defined(HAS_FCNTL) && defined(F_SETFD)
|
|
{
|
|
int fd = PerlIO_fileno(PL_rsfp);
|
|
fcntl(fd,F_SETFD,fd >= 3);
|
|
}
|
|
#endif
|
|
/* Mark this internal pseudo-handle as clean */
|
|
IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;
|
|
if (PL_preprocess)
|
|
IoTYPE(GvIOp(gv)) = '|';
|
|
else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
|
|
IoTYPE(GvIOp(gv)) = '-';
|
|
else
|
|
IoTYPE(GvIOp(gv)) = '<';
|
|
PL_rsfp = Nullfp;
|
|
}
|
|
goto fake_eof;
|
|
}
|
|
|
|
case KEY_AUTOLOAD:
|
|
case KEY_DESTROY:
|
|
case KEY_BEGIN:
|
|
case KEY_END:
|
|
case KEY_INIT:
|
|
if (PL_expect == XSTATE) {
|
|
s = PL_bufptr;
|
|
goto really_sub;
|
|
}
|
|
goto just_a_word;
|
|
|
|
case KEY_CORE:
|
|
if (*s == ':' && s[1] == ':') {
|
|
s += 2;
|
|
d = s;
|
|
s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, FALSE, &len);
|
|
tmp = keyword(PL_tokenbuf, len);
|
|
if (tmp < 0)
|
|
tmp = -tmp;
|
|
goto reserved_word;
|
|
}
|
|
goto just_a_word;
|
|
|
|
case KEY_abs:
|
|
UNI(OP_ABS);
|
|
|
|
case KEY_alarm:
|
|
UNI(OP_ALARM);
|
|
|
|
case KEY_accept:
|
|
LOP(OP_ACCEPT,XTERM);
|
|
|
|
case KEY_and:
|
|
OPERATOR(ANDOP);
|
|
|
|
case KEY_atan2:
|
|
LOP(OP_ATAN2,XTERM);
|
|
|
|
case KEY_bind:
|
|
LOP(OP_BIND,XTERM);
|
|
|
|
case KEY_binmode:
|
|
UNI(OP_BINMODE);
|
|
|
|
case KEY_bless:
|
|
LOP(OP_BLESS,XTERM);
|
|
|
|
case KEY_chop:
|
|
UNI(OP_CHOP);
|
|
|
|
case KEY_continue:
|
|
PREBLOCK(CONTINUE);
|
|
|
|
case KEY_chdir:
|
|
(void)gv_fetchpv("ENV",TRUE, SVt_PVHV); /* may use HOME */
|
|
UNI(OP_CHDIR);
|
|
|
|
case KEY_close:
|
|
UNI(OP_CLOSE);
|
|
|
|
case KEY_closedir:
|
|
UNI(OP_CLOSEDIR);
|
|
|
|
case KEY_cmp:
|
|
Eop(OP_SCMP);
|
|
|
|
case KEY_caller:
|
|
UNI(OP_CALLER);
|
|
|
|
case KEY_crypt:
|
|
#ifdef FCRYPT
|
|
if (!PL_cryptseen++)
|
|
init_des();
|
|
#endif
|
|
LOP(OP_CRYPT,XTERM);
|
|
|
|
case KEY_chmod:
|
|
if (PL_dowarn) {
|
|
for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
|
|
if (*d != '0' && isDIGIT(*d))
|
|
yywarn("chmod: mode argument is missing initial 0");
|
|
}
|
|
LOP(OP_CHMOD,XTERM);
|
|
|
|
case KEY_chown:
|
|
LOP(OP_CHOWN,XTERM);
|
|
|
|
case KEY_connect:
|
|
LOP(OP_CONNECT,XTERM);
|
|
|
|
case KEY_chr:
|
|
UNI(OP_CHR);
|
|
|
|
case KEY_cos:
|
|
UNI(OP_COS);
|
|
|
|
case KEY_chroot:
|
|
UNI(OP_CHROOT);
|
|
|
|
case KEY_do:
|
|
s = skipspace(s);
|
|
if (*s == '{')
|
|
PRETERMBLOCK(DO);
|
|
if (*s != '\'')
|
|
s = force_word(s,WORD,FALSE,TRUE,FALSE);
|
|
OPERATOR(DO);
|
|
|
|
case KEY_die:
|
|
PL_hints |= HINT_BLOCK_SCOPE;
|
|
LOP(OP_DIE,XTERM);
|
|
|
|
case KEY_defined:
|
|
UNI(OP_DEFINED);
|
|
|
|
case KEY_delete:
|
|
UNI(OP_DELETE);
|
|
|
|
case KEY_dbmopen:
|
|
gv_fetchpv("AnyDBM_File::ISA", GV_ADDMULTI, SVt_PVAV);
|
|
LOP(OP_DBMOPEN,XTERM);
|
|
|
|
case KEY_dbmclose:
|
|
UNI(OP_DBMCLOSE);
|
|
|
|
case KEY_dump:
|
|
s = force_word(s,WORD,TRUE,FALSE,FALSE);
|
|
LOOPX(OP_DUMP);
|
|
|
|
case KEY_else:
|
|
PREBLOCK(ELSE);
|
|
|
|
case KEY_elsif:
|
|
yylval.ival = PL_curcop->cop_line;
|
|
OPERATOR(ELSIF);
|
|
|
|
case KEY_eq:
|
|
Eop(OP_SEQ);
|
|
|
|
case KEY_exists:
|
|
UNI(OP_EXISTS);
|
|
|
|
case KEY_exit:
|
|
UNI(OP_EXIT);
|
|
|
|
case KEY_eval:
|
|
s = skipspace(s);
|
|
PL_expect = (*s == '{') ? XTERMBLOCK : XTERM;
|
|
UNIBRACK(OP_ENTEREVAL);
|
|
|
|
case KEY_eof:
|
|
UNI(OP_EOF);
|
|
|
|
case KEY_exp:
|
|
UNI(OP_EXP);
|
|
|
|
case KEY_each:
|
|
UNI(OP_EACH);
|
|
|
|
case KEY_exec:
|
|
set_csh();
|
|
LOP(OP_EXEC,XREF);
|
|
|
|
case KEY_endhostent:
|
|
FUN0(OP_EHOSTENT);
|
|
|
|
case KEY_endnetent:
|
|
FUN0(OP_ENETENT);
|
|
|
|
case KEY_endservent:
|
|
FUN0(OP_ESERVENT);
|
|
|
|
case KEY_endprotoent:
|
|
FUN0(OP_EPROTOENT);
|
|
|
|
case KEY_endpwent:
|
|
FUN0(OP_EPWENT);
|
|
|
|
case KEY_endgrent:
|
|
FUN0(OP_EGRENT);
|
|
|
|
case KEY_for:
|
|
case KEY_foreach:
|
|
yylval.ival = PL_curcop->cop_line;
|
|
s = skipspace(s);
|
|
if (PL_expect == XSTATE && isIDFIRST(*s)) {
|
|
char *p = s;
|
|
if ((PL_bufend - p) >= 3 &&
|
|
strnEQ(p, "my", 2) && isSPACE(*(p + 2)))
|
|
p += 2;
|
|
p = skipspace(p);
|
|
if (isIDFIRST(*p))
|
|
croak("Missing $ on loop variable");
|
|
}
|
|
OPERATOR(FOR);
|
|
|
|
case KEY_formline:
|
|
LOP(OP_FORMLINE,XTERM);
|
|
|
|
case KEY_fork:
|
|
FUN0(OP_FORK);
|
|
|
|
case KEY_fcntl:
|
|
LOP(OP_FCNTL,XTERM);
|
|
|
|
case KEY_fileno:
|
|
UNI(OP_FILENO);
|
|
|
|
case KEY_flock:
|
|
LOP(OP_FLOCK,XTERM);
|
|
|
|
case KEY_gt:
|
|
Rop(OP_SGT);
|
|
|
|
case KEY_ge:
|
|
Rop(OP_SGE);
|
|
|
|
case KEY_grep:
|
|
LOP(OP_GREPSTART, *s == '(' ? XTERM : XREF);
|
|
|
|
case KEY_goto:
|
|
s = force_word(s,WORD,TRUE,FALSE,FALSE);
|
|
LOOPX(OP_GOTO);
|
|
|
|
case KEY_gmtime:
|
|
UNI(OP_GMTIME);
|
|
|
|
case KEY_getc:
|
|
UNI(OP_GETC);
|
|
|
|
case KEY_getppid:
|
|
FUN0(OP_GETPPID);
|
|
|
|
case KEY_getpgrp:
|
|
UNI(OP_GETPGRP);
|
|
|
|
case KEY_getpriority:
|
|
LOP(OP_GETPRIORITY,XTERM);
|
|
|
|
case KEY_getprotobyname:
|
|
UNI(OP_GPBYNAME);
|
|
|
|
case KEY_getprotobynumber:
|
|
LOP(OP_GPBYNUMBER,XTERM);
|
|
|
|
case KEY_getprotoent:
|
|
FUN0(OP_GPROTOENT);
|
|
|
|
case KEY_getpwent:
|
|
FUN0(OP_GPWENT);
|
|
|
|
case KEY_getpwnam:
|
|
UNI(OP_GPWNAM);
|
|
|
|
case KEY_getpwuid:
|
|
UNI(OP_GPWUID);
|
|
|
|
case KEY_getpeername:
|
|
UNI(OP_GETPEERNAME);
|
|
|
|
case KEY_gethostbyname:
|
|
UNI(OP_GHBYNAME);
|
|
|
|
case KEY_gethostbyaddr:
|
|
LOP(OP_GHBYADDR,XTERM);
|
|
|
|
case KEY_gethostent:
|
|
FUN0(OP_GHOSTENT);
|
|
|
|
case KEY_getnetbyname:
|
|
UNI(OP_GNBYNAME);
|
|
|
|
case KEY_getnetbyaddr:
|
|
LOP(OP_GNBYADDR,XTERM);
|
|
|
|
case KEY_getnetent:
|
|
FUN0(OP_GNETENT);
|
|
|
|
case KEY_getservbyname:
|
|
LOP(OP_GSBYNAME,XTERM);
|
|
|
|
case KEY_getservbyport:
|
|
LOP(OP_GSBYPORT,XTERM);
|
|
|
|
case KEY_getservent:
|
|
FUN0(OP_GSERVENT);
|
|
|
|
case KEY_getsockname:
|
|
UNI(OP_GETSOCKNAME);
|
|
|
|
case KEY_getsockopt:
|
|
LOP(OP_GSOCKOPT,XTERM);
|
|
|
|
case KEY_getgrent:
|
|
FUN0(OP_GGRENT);
|
|
|
|
case KEY_getgrnam:
|
|
UNI(OP_GGRNAM);
|
|
|
|
case KEY_getgrgid:
|
|
UNI(OP_GGRGID);
|
|
|
|
case KEY_getlogin:
|
|
FUN0(OP_GETLOGIN);
|
|
|
|
case KEY_glob:
|
|
set_csh();
|
|
LOP(OP_GLOB,XTERM);
|
|
|
|
case KEY_hex:
|
|
UNI(OP_HEX);
|
|
|
|
case KEY_if:
|
|
yylval.ival = PL_curcop->cop_line;
|
|
OPERATOR(IF);
|
|
|
|
case KEY_index:
|
|
LOP(OP_INDEX,XTERM);
|
|
|
|
case KEY_int:
|
|
UNI(OP_INT);
|
|
|
|
case KEY_ioctl:
|
|
LOP(OP_IOCTL,XTERM);
|
|
|
|
case KEY_join:
|
|
LOP(OP_JOIN,XTERM);
|
|
|
|
case KEY_keys:
|
|
UNI(OP_KEYS);
|
|
|
|
case KEY_kill:
|
|
LOP(OP_KILL,XTERM);
|
|
|
|
case KEY_last:
|
|
s = force_word(s,WORD,TRUE,FALSE,FALSE);
|
|
LOOPX(OP_LAST);
|
|
|
|
case KEY_lc:
|
|
UNI(OP_LC);
|
|
|
|
case KEY_lcfirst:
|
|
UNI(OP_LCFIRST);
|
|
|
|
case KEY_local:
|
|
OPERATOR(LOCAL);
|
|
|
|
case KEY_length:
|
|
UNI(OP_LENGTH);
|
|
|
|
case KEY_lt:
|
|
Rop(OP_SLT);
|
|
|
|
case KEY_le:
|
|
Rop(OP_SLE);
|
|
|
|
case KEY_localtime:
|
|
UNI(OP_LOCALTIME);
|
|
|
|
case KEY_log:
|
|
UNI(OP_LOG);
|
|
|
|
case KEY_link:
|
|
LOP(OP_LINK,XTERM);
|
|
|
|
case KEY_listen:
|
|
LOP(OP_LISTEN,XTERM);
|
|
|
|
case KEY_lock:
|
|
UNI(OP_LOCK);
|
|
|
|
case KEY_lstat:
|
|
UNI(OP_LSTAT);
|
|
|
|
case KEY_m:
|
|
s = scan_pat(s,OP_MATCH);
|
|
TERM(sublex_start());
|
|
|
|
case KEY_map:
|
|
LOP(OP_MAPSTART,XREF);
|
|
|
|
case KEY_mkdir:
|
|
LOP(OP_MKDIR,XTERM);
|
|
|
|
case KEY_msgctl:
|
|
LOP(OP_MSGCTL,XTERM);
|
|
|
|
case KEY_msgget:
|
|
LOP(OP_MSGGET,XTERM);
|
|
|
|
case KEY_msgrcv:
|
|
LOP(OP_MSGRCV,XTERM);
|
|
|
|
case KEY_msgsnd:
|
|
LOP(OP_MSGSND,XTERM);
|
|
|
|
case KEY_my:
|
|
PL_in_my = TRUE;
|
|
s = skipspace(s);
|
|
if (isIDFIRST(*s)) {
|
|
s = scan_word(s, PL_tokenbuf, sizeof PL_tokenbuf, TRUE, &len);
|
|
PL_in_my_stash = gv_stashpv(PL_tokenbuf, FALSE);
|
|
if (!PL_in_my_stash) {
|
|
char tmpbuf[1024];
|
|
PL_bufptr = s;
|
|
sprintf(tmpbuf, "No such class %.1000s", PL_tokenbuf);
|
|
yyerror(tmpbuf);
|
|
}
|
|
}
|
|
OPERATOR(MY);
|
|
|
|
case KEY_next:
|
|
s = force_word(s,WORD,TRUE,FALSE,FALSE);
|
|
LOOPX(OP_NEXT);
|
|
|
|
case KEY_ne:
|
|
Eop(OP_SNE);
|
|
|
|
case KEY_no:
|
|
if (PL_expect != XSTATE)
|
|
yyerror("\"no\" not allowed in expression");
|
|
s = force_word(s,WORD,FALSE,TRUE,FALSE);
|
|
s = force_version(s);
|
|
yylval.ival = 0;
|
|
OPERATOR(USE);
|
|
|
|
case KEY_not:
|
|
OPERATOR(NOTOP);
|
|
|
|
case KEY_open:
|
|
s = skipspace(s);
|
|
if (isIDFIRST(*s)) {
|
|
char *t;
|
|
for (d = s; isALNUM(*d); d++) ;
|
|
t = skipspace(d);
|
|
if (strchr("|&*+-=!?:.", *t))
|
|
warn("Precedence problem: open %.*s should be open(%.*s)",
|
|
d-s,s, d-s,s);
|
|
}
|
|
LOP(OP_OPEN,XTERM);
|
|
|
|
case KEY_or:
|
|
yylval.ival = OP_OR;
|
|
OPERATOR(OROP);
|
|
|
|
case KEY_ord:
|
|
UNI(OP_ORD);
|
|
|
|
case KEY_oct:
|
|
UNI(OP_OCT);
|
|
|
|
case KEY_opendir:
|
|
LOP(OP_OPEN_DIR,XTERM);
|
|
|
|
case KEY_print:
|
|
checkcomma(s,PL_tokenbuf,"filehandle");
|
|
LOP(OP_PRINT,XREF);
|
|
|
|
case KEY_printf:
|
|
checkcomma(s,PL_tokenbuf,"filehandle");
|
|
LOP(OP_PRTF,XREF);
|
|
|
|
case KEY_prototype:
|
|
UNI(OP_PROTOTYPE);
|
|
|
|
case KEY_push:
|
|
LOP(OP_PUSH,XTERM);
|
|
|
|
case KEY_pop:
|
|
UNI(OP_POP);
|
|
|
|
case KEY_pos:
|
|
UNI(OP_POS);
|
|
|
|
case KEY_pack:
|
|
LOP(OP_PACK,XTERM);
|
|
|
|
case KEY_package:
|
|
s = force_word(s,WORD,FALSE,TRUE,FALSE);
|
|
OPERATOR(PACKAGE);
|
|
|
|
case KEY_pipe:
|
|
LOP(OP_PIPE_OP,XTERM);
|
|
|
|
case KEY_q:
|
|
s = scan_str(s);
|
|
if (!s)
|
|
missingterm((char*)0);
|
|
yylval.ival = OP_CONST;
|
|
TERM(sublex_start());
|
|
|
|
case KEY_quotemeta:
|
|
UNI(OP_QUOTEMETA);
|
|
|
|
case KEY_qw:
|
|
s = scan_str(s);
|
|
if (!s)
|
|
missingterm((char*)0);
|
|
if (PL_dowarn && SvLEN(PL_lex_stuff)) {
|
|
d = SvPV_force(PL_lex_stuff, len);
|
|
for (; len; --len, ++d) {
|
|
if (*d == ',') {
|
|
warn("Possible attempt to separate words with commas");
|
|
break;
|
|
}
|
|
if (*d == '#') {
|
|
warn("Possible attempt to put comments in qw() list");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
force_next(')');
|
|
PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, tokeq(PL_lex_stuff));
|
|
PL_lex_stuff = Nullsv;
|
|
force_next(THING);
|
|
force_next(',');
|
|
PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, newSVpv(" ",1));
|
|
force_next(THING);
|
|
force_next('(');
|
|
yylval.ival = OP_SPLIT;
|
|
CLINE;
|
|
PL_expect = XTERM;
|
|
PL_bufptr = s;
|
|
PL_last_lop = PL_oldbufptr;
|
|
PL_last_lop_op = OP_SPLIT;
|
|
return FUNC;
|
|
|
|
case KEY_qq:
|
|
s = scan_str(s);
|
|
if (!s)
|
|
missingterm((char*)0);
|
|
yylval.ival = OP_STRINGIFY;
|
|
if (SvIVX(PL_lex_stuff) == '\'')
|
|
SvIVX(PL_lex_stuff) = 0; /* qq'$foo' should intepolate */
|
|
TERM(sublex_start());
|
|
|
|
case KEY_qr:
|
|
s = scan_pat(s,OP_QR);
|
|
TERM(sublex_start());
|
|
|
|
case KEY_qx:
|
|
s = scan_str(s);
|
|
if (!s)
|
|
missingterm((char*)0);
|
|
yylval.ival = OP_BACKTICK;
|
|
set_csh();
|
|
TERM(sublex_start());
|
|
|
|
case KEY_return:
|
|
OLDLOP(OP_RETURN);
|
|
|
|
case KEY_require:
|
|
*PL_tokenbuf = '\0';
|
|
s = force_word(s,WORD,TRUE,TRUE,FALSE);
|
|
if (isIDFIRST(*PL_tokenbuf))
|
|
gv_stashpvn(PL_tokenbuf, strlen(PL_tokenbuf), TRUE);
|
|
else if (*s == '<')
|
|
yyerror("<> should be quotes");
|
|
UNI(OP_REQUIRE);
|
|
|
|
case KEY_reset:
|
|
UNI(OP_RESET);
|
|
|
|
case KEY_redo:
|
|
s = force_word(s,WORD,TRUE,FALSE,FALSE);
|
|
LOOPX(OP_REDO);
|
|
|
|
case KEY_rename:
|
|
LOP(OP_RENAME,XTERM);
|
|
|
|
case KEY_rand:
|
|
UNI(OP_RAND);
|
|
|
|
case KEY_rmdir:
|
|
UNI(OP_RMDIR);
|
|
|
|
case KEY_rindex:
|
|
LOP(OP_RINDEX,XTERM);
|
|
|
|
case KEY_read:
|
|
LOP(OP_READ,XTERM);
|
|
|
|
case KEY_readdir:
|
|
UNI(OP_READDIR);
|
|
|
|
case KEY_readline:
|
|
set_csh();
|
|
UNI(OP_READLINE);
|
|
|
|
case KEY_readpipe:
|
|
set_csh();
|
|
UNI(OP_BACKTICK);
|
|
|
|
case KEY_rewinddir:
|
|
UNI(OP_REWINDDIR);
|
|
|
|
case KEY_recv:
|
|
LOP(OP_RECV,XTERM);
|
|
|
|
case KEY_reverse:
|
|
LOP(OP_REVERSE,XTERM);
|
|
|
|
case KEY_readlink:
|
|
UNI(OP_READLINK);
|
|
|
|
case KEY_ref:
|
|
UNI(OP_REF);
|
|
|
|
case KEY_s:
|
|
s = scan_subst(s);
|
|
if (yylval.opval)
|
|
TERM(sublex_start());
|
|
else
|
|
TOKEN(1); /* force error */
|
|
|
|
case KEY_chomp:
|
|
UNI(OP_CHOMP);
|
|
|
|
case KEY_scalar:
|
|
UNI(OP_SCALAR);
|
|
|
|
case KEY_select:
|
|
LOP(OP_SELECT,XTERM);
|
|
|
|
case KEY_seek:
|
|
LOP(OP_SEEK,XTERM);
|
|
|
|
case KEY_semctl:
|
|
LOP(OP_SEMCTL,XTERM);
|
|
|
|
case KEY_semget:
|
|
LOP(OP_SEMGET,XTERM);
|
|
|
|
case KEY_semop:
|
|
LOP(OP_SEMOP,XTERM);
|
|
|
|
case KEY_send:
|
|
LOP(OP_SEND,XTERM);
|
|
|
|
case KEY_setpgrp:
|
|
LOP(OP_SETPGRP,XTERM);
|
|
|
|
case KEY_setpriority:
|
|
LOP(OP_SETPRIORITY,XTERM);
|
|
|
|
case KEY_sethostent:
|
|
UNI(OP_SHOSTENT);
|
|
|
|
case KEY_setnetent:
|
|
UNI(OP_SNETENT);
|
|
|
|
case KEY_setservent:
|
|
UNI(OP_SSERVENT);
|
|
|
|
case KEY_setprotoent:
|
|
UNI(OP_SPROTOENT);
|
|
|
|
case KEY_setpwent:
|
|
FUN0(OP_SPWENT);
|
|
|
|
case KEY_setgrent:
|
|
FUN0(OP_SGRENT);
|
|
|
|
case KEY_seekdir:
|
|
LOP(OP_SEEKDIR,XTERM);
|
|
|
|
case KEY_setsockopt:
|
|
LOP(OP_SSOCKOPT,XTERM);
|
|
|
|
case KEY_shift:
|
|
UNI(OP_SHIFT);
|
|
|
|
case KEY_shmctl:
|
|
LOP(OP_SHMCTL,XTERM);
|
|
|
|
case KEY_shmget:
|
|
LOP(OP_SHMGET,XTERM);
|
|
|
|
case KEY_shmread:
|
|
LOP(OP_SHMREAD,XTERM);
|
|
|
|
case KEY_shmwrite:
|
|
LOP(OP_SHMWRITE,XTERM);
|
|
|
|
case KEY_shutdown:
|
|
LOP(OP_SHUTDOWN,XTERM);
|
|
|
|
case KEY_sin:
|
|
UNI(OP_SIN);
|
|
|
|
case KEY_sleep:
|
|
UNI(OP_SLEEP);
|
|
|
|
case KEY_socket:
|
|
LOP(OP_SOCKET,XTERM);
|
|
|
|
case KEY_socketpair:
|
|
LOP(OP_SOCKPAIR,XTERM);
|
|
|
|
case KEY_sort:
|
|
checkcomma(s,PL_tokenbuf,"subroutine name");
|
|
s = skipspace(s);
|
|
if (*s == ';' || *s == ')') /* probably a close */
|
|
croak("sort is now a reserved word");
|
|
PL_expect = XTERM;
|
|
s = force_word(s,WORD,TRUE,TRUE,FALSE);
|
|
LOP(OP_SORT,XREF);
|
|
|
|
case KEY_split:
|
|
LOP(OP_SPLIT,XTERM);
|
|
|
|
case KEY_sprintf:
|
|
LOP(OP_SPRINTF,XTERM);
|
|
|
|
case KEY_splice:
|
|
LOP(OP_SPLICE,XTERM);
|
|
|
|
case KEY_sqrt:
|
|
UNI(OP_SQRT);
|
|
|
|
case KEY_srand:
|
|
UNI(OP_SRAND);
|
|
|
|
case KEY_stat:
|
|
UNI(OP_STAT);
|
|
|
|
case KEY_study:
|
|
PL_sawstudy++;
|
|
UNI(OP_STUDY);
|
|
|
|
case KEY_substr:
|
|
LOP(OP_SUBSTR,XTERM);
|
|
|
|
case KEY_format:
|
|
case KEY_sub:
|
|
really_sub:
|
|
s = skipspace(s);
|
|
|
|
if (isIDFIRST(*s) || *s == '\'' || *s == ':') {
|
|
char tmpbuf[sizeof PL_tokenbuf];
|
|
PL_expect = XBLOCK;
|
|
d = scan_word(s, tmpbuf, sizeof tmpbuf, TRUE, &len);
|
|
if (strchr(tmpbuf, ':'))
|
|
sv_setpv(PL_subname, tmpbuf);
|
|
else {
|
|
sv_setsv(PL_subname,PL_curstname);
|
|
sv_catpvn(PL_subname,"::",2);
|
|
sv_catpvn(PL_subname,tmpbuf,len);
|
|
}
|
|
s = force_word(s,WORD,FALSE,TRUE,TRUE);
|
|
s = skipspace(s);
|
|
}
|
|
else {
|
|
PL_expect = XTERMBLOCK;
|
|
sv_setpv(PL_subname,"?");
|
|
}
|
|
|
|
if (tmp == KEY_format) {
|
|
s = skipspace(s);
|
|
if (*s == '=')
|
|
PL_lex_formbrack = PL_lex_brackets + 1;
|
|
OPERATOR(FORMAT);
|
|
}
|
|
|
|
/* Look for a prototype */
|
|
if (*s == '(') {
|
|
char *p;
|
|
|
|
s = scan_str(s);
|
|
if (!s) {
|
|
if (PL_lex_stuff)
|
|
SvREFCNT_dec(PL_lex_stuff);
|
|
PL_lex_stuff = Nullsv;
|
|
croak("Prototype not terminated");
|
|
}
|
|
/* strip spaces */
|
|
d = SvPVX(PL_lex_stuff);
|
|
tmp = 0;
|
|
for (p = d; *p; ++p) {
|
|
if (!isSPACE(*p))
|
|
d[tmp++] = *p;
|
|
}
|
|
d[tmp] = '\0';
|
|
SvCUR(PL_lex_stuff) = tmp;
|
|
|
|
PL_nexttoke++;
|
|
PL_nextval[1] = PL_nextval[0];
|
|
PL_nexttype[1] = PL_nexttype[0];
|
|
PL_nextval[0].opval = (OP*)newSVOP(OP_CONST, 0, PL_lex_stuff);
|
|
PL_nexttype[0] = THING;
|
|
if (PL_nexttoke == 1) {
|
|
PL_lex_defer = PL_lex_state;
|
|
PL_lex_expect = PL_expect;
|
|
PL_lex_state = LEX_KNOWNEXT;
|
|
}
|
|
PL_lex_stuff = Nullsv;
|
|
}
|
|
|
|
if (*SvPV(PL_subname,n_a) == '?') {
|
|
sv_setpv(PL_subname,"__ANON__");
|
|
TOKEN(ANONSUB);
|
|
}
|
|
PREBLOCK(SUB);
|
|
|
|
case KEY_system:
|
|
set_csh();
|
|
LOP(OP_SYSTEM,XREF);
|
|
|
|
case KEY_symlink:
|
|
LOP(OP_SYMLINK,XTERM);
|
|
|
|
case KEY_syscall:
|
|
LOP(OP_SYSCALL,XTERM);
|
|
|
|
case KEY_sysopen:
|
|
LOP(OP_SYSOPEN,XTERM);
|
|
|
|
case KEY_sysseek:
|
|
LOP(OP_SYSSEEK,XTERM);
|
|
|
|
case KEY_sysread:
|
|
LOP(OP_SYSREAD,XTERM);
|
|
|
|
case KEY_syswrite:
|
|
LOP(OP_SYSWRITE,XTERM);
|
|
|
|
case KEY_tr:
|
|
s = scan_trans(s);
|
|
TERM(sublex_start());
|
|
|
|
case KEY_tell:
|
|
UNI(OP_TELL);
|
|
|
|
case KEY_telldir:
|
|
UNI(OP_TELLDIR);
|
|
|
|
case KEY_tie:
|
|
LOP(OP_TIE,XTERM);
|
|
|
|
case KEY_tied:
|
|
UNI(OP_TIED);
|
|
|
|
case KEY_time:
|
|
FUN0(OP_TIME);
|
|
|
|
case KEY_times:
|
|
FUN0(OP_TMS);
|
|
|
|
case KEY_truncate:
|
|
LOP(OP_TRUNCATE,XTERM);
|
|
|
|
case KEY_uc:
|
|
UNI(OP_UC);
|
|
|
|
case KEY_ucfirst:
|
|
UNI(OP_UCFIRST);
|
|
|
|
case KEY_untie:
|
|
UNI(OP_UNTIE);
|
|
|
|
case KEY_until:
|
|
yylval.ival = PL_curcop->cop_line;
|
|
OPERATOR(UNTIL);
|
|
|
|
case KEY_unless:
|
|
yylval.ival = PL_curcop->cop_line;
|
|
OPERATOR(UNLESS);
|
|
|
|
case KEY_unlink:
|
|
LOP(OP_UNLINK,XTERM);
|
|
|
|
case KEY_undef:
|
|
UNI(OP_UNDEF);
|
|
|
|
case KEY_unpack:
|
|
LOP(OP_UNPACK,XTERM);
|
|
|
|
case KEY_utime:
|
|
LOP(OP_UTIME,XTERM);
|
|
|
|
case KEY_umask:
|
|
if (PL_dowarn) {
|
|
for (d = s; d < PL_bufend && (isSPACE(*d) || *d == '('); d++) ;
|
|
if (*d != '0' && isDIGIT(*d))
|
|
yywarn("umask: argument is missing initial 0");
|
|
}
|
|
UNI(OP_UMASK);
|
|
|
|
case KEY_unshift:
|
|
LOP(OP_UNSHIFT,XTERM);
|
|
|
|
case KEY_use:
|
|
if (PL_expect != XSTATE)
|
|
yyerror("\"use\" not allowed in expression");
|
|
s = skipspace(s);
|
|
if(isDIGIT(*s)) {
|
|
s = force_version(s);
|
|
if(*s == ';' || (s = skipspace(s), *s == ';')) {
|
|
PL_nextval[PL_nexttoke].opval = Nullop;
|
|
force_next(WORD);
|
|
}
|
|
}
|
|
else {
|
|
s = force_word(s,WORD,FALSE,TRUE,FALSE);
|
|
s = force_version(s);
|
|
}
|
|
yylval.ival = 1;
|
|
OPERATOR(USE);
|
|
|
|
case KEY_values:
|
|
UNI(OP_VALUES);
|
|
|
|
case KEY_vec:
|
|
PL_sawvec = TRUE;
|
|
LOP(OP_VEC,XTERM);
|
|
|
|
case KEY_while:
|
|
yylval.ival = PL_curcop->cop_line;
|
|
OPERATOR(WHILE);
|
|
|
|
case KEY_warn:
|
|
PL_hints |= HINT_BLOCK_SCOPE;
|
|
LOP(OP_WARN,XTERM);
|
|
|
|
case KEY_wait:
|
|
FUN0(OP_WAIT);
|
|
|
|
case KEY_waitpid:
|
|
LOP(OP_WAITPID,XTERM);
|
|
|
|
case KEY_wantarray:
|
|
FUN0(OP_WANTARRAY);
|
|
|
|
case KEY_write:
|
|
#ifdef EBCDIC
|
|
{
|
|
static char ctl_l[2];
|
|
|
|
if (ctl_l[0] == '\0')
|
|
ctl_l[0] = toCTRL('L');
|
|
gv_fetchpv(ctl_l,TRUE, SVt_PV);
|
|
}
|
|
#else
|
|
gv_fetchpv("\f",TRUE, SVt_PV); /* Make sure $^L is defined */
|
|
#endif
|
|
UNI(OP_ENTERWRITE);
|
|
|
|
case KEY_x:
|
|
if (PL_expect == XOPERATOR)
|
|
Mop(OP_REPEAT);
|
|
check_uni();
|
|
goto just_a_word;
|
|
|
|
case KEY_xor:
|
|
yylval.ival = OP_XOR;
|
|
OPERATOR(OROP);
|
|
|
|
case KEY_y:
|
|
s = scan_trans(s);
|
|
TERM(sublex_start());
|
|
}
|
|
}}
|
|
}
|
|
|
|
I32
|
|
keyword(register char *d, I32 len)
|
|
{
|
|
switch (*d) {
|
|
case '_':
|
|
if (d[1] == '_') {
|
|
if (strEQ(d,"__FILE__")) return -KEY___FILE__;
|
|
if (strEQ(d,"__LINE__")) return -KEY___LINE__;
|
|
if (strEQ(d,"__PACKAGE__")) return -KEY___PACKAGE__;
|
|
if (strEQ(d,"__DATA__")) return KEY___DATA__;
|
|
if (strEQ(d,"__END__")) return KEY___END__;
|
|
}
|
|
break;
|
|
case 'A':
|
|
if (strEQ(d,"AUTOLOAD")) return KEY_AUTOLOAD;
|
|
break;
|
|
case 'a':
|
|
switch (len) {
|
|
case 3:
|
|
if (strEQ(d,"and")) return -KEY_and;
|
|
if (strEQ(d,"abs")) return -KEY_abs;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"alarm")) return -KEY_alarm;
|
|
if (strEQ(d,"atan2")) return -KEY_atan2;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"accept")) return -KEY_accept;
|
|
break;
|
|
}
|
|
break;
|
|
case 'B':
|
|
if (strEQ(d,"BEGIN")) return KEY_BEGIN;
|
|
break;
|
|
case 'b':
|
|
if (strEQ(d,"bless")) return -KEY_bless;
|
|
if (strEQ(d,"bind")) return -KEY_bind;
|
|
if (strEQ(d,"binmode")) return -KEY_binmode;
|
|
break;
|
|
case 'C':
|
|
if (strEQ(d,"CORE")) return -KEY_CORE;
|
|
break;
|
|
case 'c':
|
|
switch (len) {
|
|
case 3:
|
|
if (strEQ(d,"cmp")) return -KEY_cmp;
|
|
if (strEQ(d,"chr")) return -KEY_chr;
|
|
if (strEQ(d,"cos")) return -KEY_cos;
|
|
break;
|
|
case 4:
|
|
if (strEQ(d,"chop")) return KEY_chop;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"close")) return -KEY_close;
|
|
if (strEQ(d,"chdir")) return -KEY_chdir;
|
|
if (strEQ(d,"chomp")) return KEY_chomp;
|
|
if (strEQ(d,"chmod")) return -KEY_chmod;
|
|
if (strEQ(d,"chown")) return -KEY_chown;
|
|
if (strEQ(d,"crypt")) return -KEY_crypt;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"chroot")) return -KEY_chroot;
|
|
if (strEQ(d,"caller")) return -KEY_caller;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"connect")) return -KEY_connect;
|
|
break;
|
|
case 8:
|
|
if (strEQ(d,"closedir")) return -KEY_closedir;
|
|
if (strEQ(d,"continue")) return -KEY_continue;
|
|
break;
|
|
}
|
|
break;
|
|
case 'D':
|
|
if (strEQ(d,"DESTROY")) return KEY_DESTROY;
|
|
break;
|
|
case 'd':
|
|
switch (len) {
|
|
case 2:
|
|
if (strEQ(d,"do")) return KEY_do;
|
|
break;
|
|
case 3:
|
|
if (strEQ(d,"die")) return -KEY_die;
|
|
break;
|
|
case 4:
|
|
if (strEQ(d,"dump")) return -KEY_dump;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"delete")) return KEY_delete;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"defined")) return KEY_defined;
|
|
if (strEQ(d,"dbmopen")) return -KEY_dbmopen;
|
|
break;
|
|
case 8:
|
|
if (strEQ(d,"dbmclose")) return -KEY_dbmclose;
|
|
break;
|
|
}
|
|
break;
|
|
case 'E':
|
|
if (strEQ(d,"EQ")) { deprecate(d); return -KEY_eq;}
|
|
if (strEQ(d,"END")) return KEY_END;
|
|
break;
|
|
case 'e':
|
|
switch (len) {
|
|
case 2:
|
|
if (strEQ(d,"eq")) return -KEY_eq;
|
|
break;
|
|
case 3:
|
|
if (strEQ(d,"eof")) return -KEY_eof;
|
|
if (strEQ(d,"exp")) return -KEY_exp;
|
|
break;
|
|
case 4:
|
|
if (strEQ(d,"else")) return KEY_else;
|
|
if (strEQ(d,"exit")) return -KEY_exit;
|
|
if (strEQ(d,"eval")) return KEY_eval;
|
|
if (strEQ(d,"exec")) return -KEY_exec;
|
|
if (strEQ(d,"each")) return KEY_each;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"elsif")) return KEY_elsif;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"exists")) return KEY_exists;
|
|
if (strEQ(d,"elseif")) warn("elseif should be elsif");
|
|
break;
|
|
case 8:
|
|
if (strEQ(d,"endgrent")) return -KEY_endgrent;
|
|
if (strEQ(d,"endpwent")) return -KEY_endpwent;
|
|
break;
|
|
case 9:
|
|
if (strEQ(d,"endnetent")) return -KEY_endnetent;
|
|
break;
|
|
case 10:
|
|
if (strEQ(d,"endhostent")) return -KEY_endhostent;
|
|
if (strEQ(d,"endservent")) return -KEY_endservent;
|
|
break;
|
|
case 11:
|
|
if (strEQ(d,"endprotoent")) return -KEY_endprotoent;
|
|
break;
|
|
}
|
|
break;
|
|
case 'f':
|
|
switch (len) {
|
|
case 3:
|
|
if (strEQ(d,"for")) return KEY_for;
|
|
break;
|
|
case 4:
|
|
if (strEQ(d,"fork")) return -KEY_fork;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"fcntl")) return -KEY_fcntl;
|
|
if (strEQ(d,"flock")) return -KEY_flock;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"format")) return KEY_format;
|
|
if (strEQ(d,"fileno")) return -KEY_fileno;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"foreach")) return KEY_foreach;
|
|
break;
|
|
case 8:
|
|
if (strEQ(d,"formline")) return -KEY_formline;
|
|
break;
|
|
}
|
|
break;
|
|
case 'G':
|
|
if (len == 2) {
|
|
if (strEQ(d,"GT")) { deprecate(d); return -KEY_gt;}
|
|
if (strEQ(d,"GE")) { deprecate(d); return -KEY_ge;}
|
|
}
|
|
break;
|
|
case 'g':
|
|
if (strnEQ(d,"get",3)) {
|
|
d += 3;
|
|
if (*d == 'p') {
|
|
switch (len) {
|
|
case 7:
|
|
if (strEQ(d,"ppid")) return -KEY_getppid;
|
|
if (strEQ(d,"pgrp")) return -KEY_getpgrp;
|
|
break;
|
|
case 8:
|
|
if (strEQ(d,"pwent")) return -KEY_getpwent;
|
|
if (strEQ(d,"pwnam")) return -KEY_getpwnam;
|
|
if (strEQ(d,"pwuid")) return -KEY_getpwuid;
|
|
break;
|
|
case 11:
|
|
if (strEQ(d,"peername")) return -KEY_getpeername;
|
|
if (strEQ(d,"protoent")) return -KEY_getprotoent;
|
|
if (strEQ(d,"priority")) return -KEY_getpriority;
|
|
break;
|
|
case 14:
|
|
if (strEQ(d,"protobyname")) return -KEY_getprotobyname;
|
|
break;
|
|
case 16:
|
|
if (strEQ(d,"protobynumber"))return -KEY_getprotobynumber;
|
|
break;
|
|
}
|
|
}
|
|
else if (*d == 'h') {
|
|
if (strEQ(d,"hostbyname")) return -KEY_gethostbyname;
|
|
if (strEQ(d,"hostbyaddr")) return -KEY_gethostbyaddr;
|
|
if (strEQ(d,"hostent")) return -KEY_gethostent;
|
|
}
|
|
else if (*d == 'n') {
|
|
if (strEQ(d,"netbyname")) return -KEY_getnetbyname;
|
|
if (strEQ(d,"netbyaddr")) return -KEY_getnetbyaddr;
|
|
if (strEQ(d,"netent")) return -KEY_getnetent;
|
|
}
|
|
else if (*d == 's') {
|
|
if (strEQ(d,"servbyname")) return -KEY_getservbyname;
|
|
if (strEQ(d,"servbyport")) return -KEY_getservbyport;
|
|
if (strEQ(d,"servent")) return -KEY_getservent;
|
|
if (strEQ(d,"sockname")) return -KEY_getsockname;
|
|
if (strEQ(d,"sockopt")) return -KEY_getsockopt;
|
|
}
|
|
else if (*d == 'g') {
|
|
if (strEQ(d,"grent")) return -KEY_getgrent;
|
|
if (strEQ(d,"grnam")) return -KEY_getgrnam;
|
|
if (strEQ(d,"grgid")) return -KEY_getgrgid;
|
|
}
|
|
else if (*d == 'l') {
|
|
if (strEQ(d,"login")) return -KEY_getlogin;
|
|
}
|
|
else if (strEQ(d,"c")) return -KEY_getc;
|
|
break;
|
|
}
|
|
switch (len) {
|
|
case 2:
|
|
if (strEQ(d,"gt")) return -KEY_gt;
|
|
if (strEQ(d,"ge")) return -KEY_ge;
|
|
break;
|
|
case 4:
|
|
if (strEQ(d,"grep")) return KEY_grep;
|
|
if (strEQ(d,"goto")) return KEY_goto;
|
|
if (strEQ(d,"glob")) return KEY_glob;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"gmtime")) return -KEY_gmtime;
|
|
break;
|
|
}
|
|
break;
|
|
case 'h':
|
|
if (strEQ(d,"hex")) return -KEY_hex;
|
|
break;
|
|
case 'I':
|
|
if (strEQ(d,"INIT")) return KEY_INIT;
|
|
break;
|
|
case 'i':
|
|
switch (len) {
|
|
case 2:
|
|
if (strEQ(d,"if")) return KEY_if;
|
|
break;
|
|
case 3:
|
|
if (strEQ(d,"int")) return -KEY_int;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"index")) return -KEY_index;
|
|
if (strEQ(d,"ioctl")) return -KEY_ioctl;
|
|
break;
|
|
}
|
|
break;
|
|
case 'j':
|
|
if (strEQ(d,"join")) return -KEY_join;
|
|
break;
|
|
case 'k':
|
|
if (len == 4) {
|
|
if (strEQ(d,"keys")) return KEY_keys;
|
|
if (strEQ(d,"kill")) return -KEY_kill;
|
|
}
|
|
break;
|
|
case 'L':
|
|
if (len == 2) {
|
|
if (strEQ(d,"LT")) { deprecate(d); return -KEY_lt;}
|
|
if (strEQ(d,"LE")) { deprecate(d); return -KEY_le;}
|
|
}
|
|
break;
|
|
case 'l':
|
|
switch (len) {
|
|
case 2:
|
|
if (strEQ(d,"lt")) return -KEY_lt;
|
|
if (strEQ(d,"le")) return -KEY_le;
|
|
if (strEQ(d,"lc")) return -KEY_lc;
|
|
break;
|
|
case 3:
|
|
if (strEQ(d,"log")) return -KEY_log;
|
|
break;
|
|
case 4:
|
|
if (strEQ(d,"last")) return KEY_last;
|
|
if (strEQ(d,"link")) return -KEY_link;
|
|
if (strEQ(d,"lock")) return -KEY_lock;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"local")) return KEY_local;
|
|
if (strEQ(d,"lstat")) return -KEY_lstat;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"length")) return -KEY_length;
|
|
if (strEQ(d,"listen")) return -KEY_listen;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"lcfirst")) return -KEY_lcfirst;
|
|
break;
|
|
case 9:
|
|
if (strEQ(d,"localtime")) return -KEY_localtime;
|
|
break;
|
|
}
|
|
break;
|
|
case 'm':
|
|
switch (len) {
|
|
case 1: return KEY_m;
|
|
case 2:
|
|
if (strEQ(d,"my")) return KEY_my;
|
|
break;
|
|
case 3:
|
|
if (strEQ(d,"map")) return KEY_map;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"mkdir")) return -KEY_mkdir;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"msgctl")) return -KEY_msgctl;
|
|
if (strEQ(d,"msgget")) return -KEY_msgget;
|
|
if (strEQ(d,"msgrcv")) return -KEY_msgrcv;
|
|
if (strEQ(d,"msgsnd")) return -KEY_msgsnd;
|
|
break;
|
|
}
|
|
break;
|
|
case 'N':
|
|
if (strEQ(d,"NE")) { deprecate(d); return -KEY_ne;}
|
|
break;
|
|
case 'n':
|
|
if (strEQ(d,"next")) return KEY_next;
|
|
if (strEQ(d,"ne")) return -KEY_ne;
|
|
if (strEQ(d,"not")) return -KEY_not;
|
|
if (strEQ(d,"no")) return KEY_no;
|
|
break;
|
|
case 'o':
|
|
switch (len) {
|
|
case 2:
|
|
if (strEQ(d,"or")) return -KEY_or;
|
|
break;
|
|
case 3:
|
|
if (strEQ(d,"ord")) return -KEY_ord;
|
|
if (strEQ(d,"oct")) return -KEY_oct;
|
|
if (strEQ(d,"our")) { deprecate("reserved word \"our\"");
|
|
return 0;}
|
|
break;
|
|
case 4:
|
|
if (strEQ(d,"open")) return -KEY_open;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"opendir")) return -KEY_opendir;
|
|
break;
|
|
}
|
|
break;
|
|
case 'p':
|
|
switch (len) {
|
|
case 3:
|
|
if (strEQ(d,"pop")) return KEY_pop;
|
|
if (strEQ(d,"pos")) return KEY_pos;
|
|
break;
|
|
case 4:
|
|
if (strEQ(d,"push")) return KEY_push;
|
|
if (strEQ(d,"pack")) return -KEY_pack;
|
|
if (strEQ(d,"pipe")) return -KEY_pipe;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"print")) return KEY_print;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"printf")) return KEY_printf;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"package")) return KEY_package;
|
|
break;
|
|
case 9:
|
|
if (strEQ(d,"prototype")) return KEY_prototype;
|
|
}
|
|
break;
|
|
case 'q':
|
|
if (len <= 2) {
|
|
if (strEQ(d,"q")) return KEY_q;
|
|
if (strEQ(d,"qr")) return KEY_qr;
|
|
if (strEQ(d,"qq")) return KEY_qq;
|
|
if (strEQ(d,"qw")) return KEY_qw;
|
|
if (strEQ(d,"qx")) return KEY_qx;
|
|
}
|
|
else if (strEQ(d,"quotemeta")) return -KEY_quotemeta;
|
|
break;
|
|
case 'r':
|
|
switch (len) {
|
|
case 3:
|
|
if (strEQ(d,"ref")) return -KEY_ref;
|
|
break;
|
|
case 4:
|
|
if (strEQ(d,"read")) return -KEY_read;
|
|
if (strEQ(d,"rand")) return -KEY_rand;
|
|
if (strEQ(d,"recv")) return -KEY_recv;
|
|
if (strEQ(d,"redo")) return KEY_redo;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"rmdir")) return -KEY_rmdir;
|
|
if (strEQ(d,"reset")) return -KEY_reset;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"return")) return KEY_return;
|
|
if (strEQ(d,"rename")) return -KEY_rename;
|
|
if (strEQ(d,"rindex")) return -KEY_rindex;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"require")) return -KEY_require;
|
|
if (strEQ(d,"reverse")) return -KEY_reverse;
|
|
if (strEQ(d,"readdir")) return -KEY_readdir;
|
|
break;
|
|
case 8:
|
|
if (strEQ(d,"readlink")) return -KEY_readlink;
|
|
if (strEQ(d,"readline")) return -KEY_readline;
|
|
if (strEQ(d,"readpipe")) return -KEY_readpipe;
|
|
break;
|
|
case 9:
|
|
if (strEQ(d,"rewinddir")) return -KEY_rewinddir;
|
|
break;
|
|
}
|
|
break;
|
|
case 's':
|
|
switch (d[1]) {
|
|
case 0: return KEY_s;
|
|
case 'c':
|
|
if (strEQ(d,"scalar")) return KEY_scalar;
|
|
break;
|
|
case 'e':
|
|
switch (len) {
|
|
case 4:
|
|
if (strEQ(d,"seek")) return -KEY_seek;
|
|
if (strEQ(d,"send")) return -KEY_send;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"semop")) return -KEY_semop;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"select")) return -KEY_select;
|
|
if (strEQ(d,"semctl")) return -KEY_semctl;
|
|
if (strEQ(d,"semget")) return -KEY_semget;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"setpgrp")) return -KEY_setpgrp;
|
|
if (strEQ(d,"seekdir")) return -KEY_seekdir;
|
|
break;
|
|
case 8:
|
|
if (strEQ(d,"setpwent")) return -KEY_setpwent;
|
|
if (strEQ(d,"setgrent")) return -KEY_setgrent;
|
|
break;
|
|
case 9:
|
|
if (strEQ(d,"setnetent")) return -KEY_setnetent;
|
|
break;
|
|
case 10:
|
|
if (strEQ(d,"setsockopt")) return -KEY_setsockopt;
|
|
if (strEQ(d,"sethostent")) return -KEY_sethostent;
|
|
if (strEQ(d,"setservent")) return -KEY_setservent;
|
|
break;
|
|
case 11:
|
|
if (strEQ(d,"setpriority")) return -KEY_setpriority;
|
|
if (strEQ(d,"setprotoent")) return -KEY_setprotoent;
|
|
break;
|
|
}
|
|
break;
|
|
case 'h':
|
|
switch (len) {
|
|
case 5:
|
|
if (strEQ(d,"shift")) return KEY_shift;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"shmctl")) return -KEY_shmctl;
|
|
if (strEQ(d,"shmget")) return -KEY_shmget;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"shmread")) return -KEY_shmread;
|
|
break;
|
|
case 8:
|
|
if (strEQ(d,"shmwrite")) return -KEY_shmwrite;
|
|
if (strEQ(d,"shutdown")) return -KEY_shutdown;
|
|
break;
|
|
}
|
|
break;
|
|
case 'i':
|
|
if (strEQ(d,"sin")) return -KEY_sin;
|
|
break;
|
|
case 'l':
|
|
if (strEQ(d,"sleep")) return -KEY_sleep;
|
|
break;
|
|
case 'o':
|
|
if (strEQ(d,"sort")) return KEY_sort;
|
|
if (strEQ(d,"socket")) return -KEY_socket;
|
|
if (strEQ(d,"socketpair")) return -KEY_socketpair;
|
|
break;
|
|
case 'p':
|
|
if (strEQ(d,"split")) return KEY_split;
|
|
if (strEQ(d,"sprintf")) return -KEY_sprintf;
|
|
if (strEQ(d,"splice")) return KEY_splice;
|
|
break;
|
|
case 'q':
|
|
if (strEQ(d,"sqrt")) return -KEY_sqrt;
|
|
break;
|
|
case 'r':
|
|
if (strEQ(d,"srand")) return -KEY_srand;
|
|
break;
|
|
case 't':
|
|
if (strEQ(d,"stat")) return -KEY_stat;
|
|
if (strEQ(d,"study")) return KEY_study;
|
|
break;
|
|
case 'u':
|
|
if (strEQ(d,"substr")) return -KEY_substr;
|
|
if (strEQ(d,"sub")) return KEY_sub;
|
|
break;
|
|
case 'y':
|
|
switch (len) {
|
|
case 6:
|
|
if (strEQ(d,"system")) return -KEY_system;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"symlink")) return -KEY_symlink;
|
|
if (strEQ(d,"syscall")) return -KEY_syscall;
|
|
if (strEQ(d,"sysopen")) return -KEY_sysopen;
|
|
if (strEQ(d,"sysread")) return -KEY_sysread;
|
|
if (strEQ(d,"sysseek")) return -KEY_sysseek;
|
|
break;
|
|
case 8:
|
|
if (strEQ(d,"syswrite")) return -KEY_syswrite;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
case 't':
|
|
switch (len) {
|
|
case 2:
|
|
if (strEQ(d,"tr")) return KEY_tr;
|
|
break;
|
|
case 3:
|
|
if (strEQ(d,"tie")) return KEY_tie;
|
|
break;
|
|
case 4:
|
|
if (strEQ(d,"tell")) return -KEY_tell;
|
|
if (strEQ(d,"tied")) return KEY_tied;
|
|
if (strEQ(d,"time")) return -KEY_time;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"times")) return -KEY_times;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"telldir")) return -KEY_telldir;
|
|
break;
|
|
case 8:
|
|
if (strEQ(d,"truncate")) return -KEY_truncate;
|
|
break;
|
|
}
|
|
break;
|
|
case 'u':
|
|
switch (len) {
|
|
case 2:
|
|
if (strEQ(d,"uc")) return -KEY_uc;
|
|
break;
|
|
case 3:
|
|
if (strEQ(d,"use")) return KEY_use;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"undef")) return KEY_undef;
|
|
if (strEQ(d,"until")) return KEY_until;
|
|
if (strEQ(d,"untie")) return KEY_untie;
|
|
if (strEQ(d,"utime")) return -KEY_utime;
|
|
if (strEQ(d,"umask")) return -KEY_umask;
|
|
break;
|
|
case 6:
|
|
if (strEQ(d,"unless")) return KEY_unless;
|
|
if (strEQ(d,"unpack")) return -KEY_unpack;
|
|
if (strEQ(d,"unlink")) return -KEY_unlink;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"unshift")) return KEY_unshift;
|
|
if (strEQ(d,"ucfirst")) return -KEY_ucfirst;
|
|
break;
|
|
}
|
|
break;
|
|
case 'v':
|
|
if (strEQ(d,"values")) return -KEY_values;
|
|
if (strEQ(d,"vec")) return -KEY_vec;
|
|
break;
|
|
case 'w':
|
|
switch (len) {
|
|
case 4:
|
|
if (strEQ(d,"warn")) return -KEY_warn;
|
|
if (strEQ(d,"wait")) return -KEY_wait;
|
|
break;
|
|
case 5:
|
|
if (strEQ(d,"while")) return KEY_while;
|
|
if (strEQ(d,"write")) return -KEY_write;
|
|
break;
|
|
case 7:
|
|
if (strEQ(d,"waitpid")) return -KEY_waitpid;
|
|
break;
|
|
case 9:
|
|
if (strEQ(d,"wantarray")) return -KEY_wantarray;
|
|
break;
|
|
}
|
|
break;
|
|
case 'x':
|
|
if (len == 1) return -KEY_x;
|
|
if (strEQ(d,"xor")) return -KEY_xor;
|
|
break;
|
|
case 'y':
|
|
if (len == 1) return KEY_y;
|
|
break;
|
|
case 'z':
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
STATIC void
|
|
checkcomma(register char *s, char *name, char *what)
|
|
{
|
|
char *w;
|
|
|
|
if (PL_dowarn && *s == ' ' && s[1] == '(') { /* XXX gotta be a better way */
|
|
int level = 1;
|
|
for (w = s+2; *w && level; w++) {
|
|
if (*w == '(')
|
|
++level;
|
|
else if (*w == ')')
|
|
--level;
|
|
}
|
|
if (*w)
|
|
for (; *w && isSPACE(*w); w++) ;
|
|
if (!*w || !strchr(";|})]oaiuw!=", *w)) /* an advisory hack only... */
|
|
warn("%s (...) interpreted as function",name);
|
|
}
|
|
while (s < PL_bufend && isSPACE(*s))
|
|
s++;
|
|
if (*s == '(')
|
|
s++;
|
|
while (s < PL_bufend && isSPACE(*s))
|
|
s++;
|
|
if (isIDFIRST(*s)) {
|
|
w = s++;
|
|
while (isALNUM(*s))
|
|
s++;
|
|
while (s < PL_bufend && isSPACE(*s))
|
|
s++;
|
|
if (*s == ',') {
|
|
int kw;
|
|
*s = '\0';
|
|
kw = keyword(w, s - w) || perl_get_cv(w, FALSE) != 0;
|
|
*s = ',';
|
|
if (kw)
|
|
return;
|
|
croak("No comma allowed after %s", what);
|
|
}
|
|
}
|
|
}
|
|
|
|
STATIC SV *
|
|
new_constant(char *s, STRLEN len, char *key, SV *sv, SV *pv, char *type)
|
|
{
|
|
dSP;
|
|
HV *table = GvHV(PL_hintgv); /* ^H */
|
|
BINOP myop;
|
|
SV *res;
|
|
bool oldcatch = CATCH_GET;
|
|
SV **cvp;
|
|
SV *cv, *typesv;
|
|
char buf[128];
|
|
|
|
if (!table) {
|
|
yyerror("%^H is not defined");
|
|
return sv;
|
|
}
|
|
cvp = hv_fetch(table, key, strlen(key), FALSE);
|
|
if (!cvp || !SvOK(*cvp)) {
|
|
sprintf(buf,"$^H{%s} is not defined", key);
|
|
yyerror(buf);
|
|
return sv;
|
|
}
|
|
sv_2mortal(sv); /* Parent created it permanently */
|
|
cv = *cvp;
|
|
if (!pv)
|
|
pv = sv_2mortal(newSVpv(s, len));
|
|
if (type)
|
|
typesv = sv_2mortal(newSVpv(type, 0));
|
|
else
|
|
typesv = &PL_sv_undef;
|
|
CATCH_SET(TRUE);
|
|
Zero(&myop, 1, BINOP);
|
|
myop.op_last = (OP *) &myop;
|
|
myop.op_next = Nullop;
|
|
myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
|
|
|
|
PUSHSTACKi(PERLSI_OVERLOAD);
|
|
ENTER;
|
|
SAVEOP();
|
|
PL_op = (OP *) &myop;
|
|
if (PERLDB_SUB && PL_curstash != PL_debstash)
|
|
PL_op->op_private |= OPpENTERSUB_DB;
|
|
PUTBACK;
|
|
pp_pushmark(ARGS);
|
|
|
|
EXTEND(sp, 4);
|
|
PUSHs(pv);
|
|
PUSHs(sv);
|
|
PUSHs(typesv);
|
|
PUSHs(cv);
|
|
PUTBACK;
|
|
|
|
if (PL_op = pp_entersub(ARGS))
|
|
CALLRUNOPS();
|
|
LEAVE;
|
|
SPAGAIN;
|
|
|
|
res = POPs;
|
|
PUTBACK;
|
|
CATCH_SET(oldcatch);
|
|
POPSTACK;
|
|
|
|
if (!SvOK(res)) {
|
|
sprintf(buf,"Call to &{$^H{%s}} did not return a defined value", key);
|
|
yyerror(buf);
|
|
}
|
|
return SvREFCNT_inc(res);
|
|
}
|
|
|
|
STATIC char *
|
|
scan_word(register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
|
|
{
|
|
register char *d = dest;
|
|
register char *e = d + destlen - 3; /* two-character token, ending NUL */
|
|
for (;;) {
|
|
if (d >= e)
|
|
croak(ident_too_long);
|
|
if (isALNUM(*s))
|
|
*d++ = *s++;
|
|
else if (*s == '\'' && allow_package && isIDFIRST(s[1])) {
|
|
*d++ = ':';
|
|
*d++ = ':';
|
|
s++;
|
|
}
|
|
else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
|
|
*d++ = *s++;
|
|
*d++ = *s++;
|
|
}
|
|
else {
|
|
*d = '\0';
|
|
*slp = d - dest;
|
|
return s;
|
|
}
|
|
}
|
|
}
|
|
|
|
STATIC char *
|
|
scan_ident(register char *s, register char *send, char *dest, STRLEN destlen, I32 ck_uni)
|
|
{
|
|
register char *d;
|
|
register char *e;
|
|
char *bracket = 0;
|
|
char funny = *s++;
|
|
|
|
if (PL_lex_brackets == 0)
|
|
PL_lex_fakebrack = 0;
|
|
if (isSPACE(*s))
|
|
s = skipspace(s);
|
|
d = dest;
|
|
e = d + destlen - 3; /* two-character token, ending NUL */
|
|
if (isDIGIT(*s)) {
|
|
while (isDIGIT(*s)) {
|
|
if (d >= e)
|
|
croak(ident_too_long);
|
|
*d++ = *s++;
|
|
}
|
|
}
|
|
else {
|
|
for (;;) {
|
|
if (d >= e)
|
|
croak(ident_too_long);
|
|
if (isALNUM(*s))
|
|
*d++ = *s++;
|
|
else if (*s == '\'' && isIDFIRST(s[1])) {
|
|
*d++ = ':';
|
|
*d++ = ':';
|
|
s++;
|
|
}
|
|
else if (*s == ':' && s[1] == ':') {
|
|
*d++ = *s++;
|
|
*d++ = *s++;
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
*d = '\0';
|
|
d = dest;
|
|
if (*d) {
|
|
if (PL_lex_state != LEX_NORMAL)
|
|
PL_lex_state = LEX_INTERPENDMAYBE;
|
|
return s;
|
|
}
|
|
if (*s == '$' && s[1] &&
|
|
(isALNUM(s[1]) || strchr("${", s[1]) || strnEQ(s+1,"::",2)) )
|
|
{
|
|
if (isDIGIT(s[1]) && PL_lex_state == LEX_INTERPNORMAL)
|
|
deprecate("\"$$<digit>\" to mean \"${$}<digit>\"");
|
|
else
|
|
return s;
|
|
}
|
|
if (*s == '{') {
|
|
bracket = s;
|
|
s++;
|
|
}
|
|
else if (ck_uni)
|
|
check_uni();
|
|
if (s < send)
|
|
*d = *s++;
|
|
d[1] = '\0';
|
|
if (*d == '^' && *s && (isUPPER(*s) || strchr("[\\]^_?", *s))) {
|
|
*d = toCTRL(*s);
|
|
s++;
|
|
}
|
|
if (bracket) {
|
|
if (isSPACE(s[-1])) {
|
|
while (s < send) {
|
|
char ch = *s++;
|
|
if (ch != ' ' && ch != '\t') {
|
|
*d = ch;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (isIDFIRST(*d)) {
|
|
d++;
|
|
while (isALNUM(*s) || *s == ':')
|
|
*d++ = *s++;
|
|
*d = '\0';
|
|
while (s < send && (*s == ' ' || *s == '\t')) s++;
|
|
if ((*s == '[' || (*s == '{' && strNE(dest, "sub")))) {
|
|
if (PL_dowarn && keyword(dest, d - dest)) {
|
|
char *brack = *s == '[' ? "[...]" : "{...}";
|
|
warn("Ambiguous use of %c{%s%s} resolved to %c%s%s",
|
|
funny, dest, brack, funny, dest, brack);
|
|
}
|
|
PL_lex_fakebrack = PL_lex_brackets+1;
|
|
bracket++;
|
|
PL_lex_brackstack[PL_lex_brackets++] = XOPERATOR;
|
|
return s;
|
|
}
|
|
}
|
|
if (*s == '}') {
|
|
s++;
|
|
if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets)
|
|
PL_lex_state = LEX_INTERPEND;
|
|
if (funny == '#')
|
|
funny = '@';
|
|
if (PL_dowarn && PL_lex_state == LEX_NORMAL &&
|
|
(keyword(dest, d - dest) || perl_get_cv(dest, FALSE)))
|
|
warn("Ambiguous use of %c{%s} resolved to %c%s",
|
|
funny, dest, funny, dest);
|
|
}
|
|
else {
|
|
s = bracket; /* let the parser handle it */
|
|
*dest = '\0';
|
|
}
|
|
}
|
|
else if (PL_lex_state == LEX_INTERPNORMAL && !PL_lex_brackets && !intuit_more(s))
|
|
PL_lex_state = LEX_INTERPEND;
|
|
return s;
|
|
}
|
|
|
|
void pmflag(U16 *pmfl, int ch)
|
|
{
|
|
if (ch == 'i')
|
|
*pmfl |= PMf_FOLD;
|
|
else if (ch == 'g')
|
|
*pmfl |= PMf_GLOBAL;
|
|
else if (ch == 'c')
|
|
*pmfl |= PMf_CONTINUE;
|
|
else if (ch == 'o')
|
|
*pmfl |= PMf_KEEP;
|
|
else if (ch == 'm')
|
|
*pmfl |= PMf_MULTILINE;
|
|
else if (ch == 's')
|
|
*pmfl |= PMf_SINGLELINE;
|
|
else if (ch == 'x')
|
|
*pmfl |= PMf_EXTENDED;
|
|
}
|
|
|
|
STATIC char *
|
|
scan_pat(char *start, I32 type)
|
|
{
|
|
PMOP *pm;
|
|
char *s;
|
|
|
|
s = scan_str(start);
|
|
if (!s) {
|
|
if (PL_lex_stuff)
|
|
SvREFCNT_dec(PL_lex_stuff);
|
|
PL_lex_stuff = Nullsv;
|
|
croak("Search pattern not terminated");
|
|
}
|
|
|
|
pm = (PMOP*)newPMOP(type, 0);
|
|
if (PL_multi_open == '?')
|
|
pm->op_pmflags |= PMf_ONCE;
|
|
if(type == OP_QR) {
|
|
while (*s && strchr("iomsx", *s))
|
|
pmflag(&pm->op_pmflags,*s++);
|
|
}
|
|
else {
|
|
while (*s && strchr("iogcmsx", *s))
|
|
pmflag(&pm->op_pmflags,*s++);
|
|
}
|
|
pm->op_pmpermflags = pm->op_pmflags;
|
|
|
|
PL_lex_op = (OP*)pm;
|
|
yylval.ival = OP_MATCH;
|
|
return s;
|
|
}
|
|
|
|
STATIC char *
|
|
scan_subst(char *start)
|
|
{
|
|
register char *s;
|
|
register PMOP *pm;
|
|
I32 first_start;
|
|
I32 es = 0;
|
|
|
|
yylval.ival = OP_NULL;
|
|
|
|
s = scan_str(start);
|
|
|
|
if (!s) {
|
|
if (PL_lex_stuff)
|
|
SvREFCNT_dec(PL_lex_stuff);
|
|
PL_lex_stuff = Nullsv;
|
|
croak("Substitution pattern not terminated");
|
|
}
|
|
|
|
if (s[-1] == PL_multi_open)
|
|
s--;
|
|
|
|
first_start = PL_multi_start;
|
|
s = scan_str(s);
|
|
if (!s) {
|
|
if (PL_lex_stuff)
|
|
SvREFCNT_dec(PL_lex_stuff);
|
|
PL_lex_stuff = Nullsv;
|
|
if (PL_lex_repl)
|
|
SvREFCNT_dec(PL_lex_repl);
|
|
PL_lex_repl = Nullsv;
|
|
croak("Substitution replacement not terminated");
|
|
}
|
|
PL_multi_start = first_start; /* so whole substitution is taken together */
|
|
|
|
pm = (PMOP*)newPMOP(OP_SUBST, 0);
|
|
while (*s) {
|
|
if (*s == 'e') {
|
|
s++;
|
|
es++;
|
|
}
|
|
else if (strchr("iogcmsx", *s))
|
|
pmflag(&pm->op_pmflags,*s++);
|
|
else
|
|
break;
|
|
}
|
|
|
|
if (es) {
|
|
SV *repl;
|
|
PL_super_bufptr = s;
|
|
PL_super_bufend = PL_bufend;
|
|
PL_multi_end = 0;
|
|
pm->op_pmflags |= PMf_EVAL;
|
|
repl = newSVpv("",0);
|
|
while (es-- > 0)
|
|
sv_catpv(repl, es ? "eval " : "do ");
|
|
sv_catpvn(repl, "{ ", 2);
|
|
sv_catsv(repl, PL_lex_repl);
|
|
sv_catpvn(repl, " };", 2);
|
|
SvCOMPILED_on(repl);
|
|
SvREFCNT_dec(PL_lex_repl);
|
|
PL_lex_repl = repl;
|
|
}
|
|
|
|
pm->op_pmpermflags = pm->op_pmflags;
|
|
PL_lex_op = (OP*)pm;
|
|
yylval.ival = OP_SUBST;
|
|
return s;
|
|
}
|
|
|
|
STATIC char *
|
|
scan_trans(char *start)
|
|
{
|
|
register char* s;
|
|
OP *o;
|
|
short *tbl;
|
|
I32 squash;
|
|
I32 Delete;
|
|
I32 complement;
|
|
|
|
yylval.ival = OP_NULL;
|
|
|
|
s = scan_str(start);
|
|
if (!s) {
|
|
if (PL_lex_stuff)
|
|
SvREFCNT_dec(PL_lex_stuff);
|
|
PL_lex_stuff = Nullsv;
|
|
croak("Transliteration pattern not terminated");
|
|
}
|
|
if (s[-1] == PL_multi_open)
|
|
s--;
|
|
|
|
s = scan_str(s);
|
|
if (!s) {
|
|
if (PL_lex_stuff)
|
|
SvREFCNT_dec(PL_lex_stuff);
|
|
PL_lex_stuff = Nullsv;
|
|
if (PL_lex_repl)
|
|
SvREFCNT_dec(PL_lex_repl);
|
|
PL_lex_repl = Nullsv;
|
|
croak("Transliteration replacement not terminated");
|
|
}
|
|
|
|
New(803,tbl,256,short);
|
|
o = newPVOP(OP_TRANS, 0, (char*)tbl);
|
|
|
|
complement = Delete = squash = 0;
|
|
while (*s == 'c' || *s == 'd' || *s == 's') {
|
|
if (*s == 'c')
|
|
complement = OPpTRANS_COMPLEMENT;
|
|
else if (*s == 'd')
|
|
Delete = OPpTRANS_DELETE;
|
|
else
|
|
squash = OPpTRANS_SQUASH;
|
|
s++;
|
|
}
|
|
o->op_private = Delete|squash|complement;
|
|
|
|
PL_lex_op = o;
|
|
yylval.ival = OP_TRANS;
|
|
return s;
|
|
}
|
|
|
|
STATIC char *
|
|
scan_heredoc(register char *s)
|
|
{
|
|
dTHR;
|
|
SV *herewas;
|
|
I32 op_type = OP_SCALAR;
|
|
I32 len;
|
|
SV *tmpstr;
|
|
char term;
|
|
register char *d;
|
|
register char *e;
|
|
char *peek;
|
|
int outer = (PL_rsfp && !(PL_lex_inwhat == OP_SCALAR));
|
|
|
|
s += 2;
|
|
d = PL_tokenbuf;
|
|
e = PL_tokenbuf + sizeof PL_tokenbuf - 1;
|
|
if (!outer)
|
|
*d++ = '\n';
|
|
for (peek = s; *peek == ' ' || *peek == '\t'; peek++) ;
|
|
if (*peek && strchr("`'\"",*peek)) {
|
|
s = peek;
|
|
term = *s++;
|
|
s = delimcpy(d, e, s, PL_bufend, term, &len);
|
|
d += len;
|
|
if (s < PL_bufend)
|
|
s++;
|
|
}
|
|
else {
|
|
if (*s == '\\')
|
|
s++, term = '\'';
|
|
else
|
|
term = '"';
|
|
if (!isALNUM(*s))
|
|
deprecate("bare << to mean <<\"\"");
|
|
for (; isALNUM(*s); s++) {
|
|
if (d < e)
|
|
*d++ = *s;
|
|
}
|
|
}
|
|
if (d >= PL_tokenbuf + sizeof PL_tokenbuf - 1)
|
|
croak("Delimiter for here document is too long");
|
|
*d++ = '\n';
|
|
*d = '\0';
|
|
len = d - PL_tokenbuf;
|
|
#ifndef PERL_STRICT_CR
|
|
d = strchr(s, '\r');
|
|
if (d) {
|
|
char *olds = s;
|
|
s = d;
|
|
while (s < PL_bufend) {
|
|
if (*s == '\r') {
|
|
*d++ = '\n';
|
|
if (*++s == '\n')
|
|
s++;
|
|
}
|
|
else if (*s == '\n' && s[1] == '\r') { /* \015\013 on a mac? */
|
|
*d++ = *s++;
|
|
s++;
|
|
}
|
|
else
|
|
*d++ = *s++;
|
|
}
|
|
*d = '\0';
|
|
PL_bufend = d;
|
|
SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
|
|
s = olds;
|
|
}
|
|
#endif
|
|
d = "\n";
|
|
if (outer || !(d=ninstr(s,PL_bufend,d,d+1)))
|
|
herewas = newSVpv(s,PL_bufend-s);
|
|
else
|
|
s--, herewas = newSVpv(s,d-s);
|
|
s += SvCUR(herewas);
|
|
|
|
tmpstr = NEWSV(87,79);
|
|
sv_upgrade(tmpstr, SVt_PVIV);
|
|
if (term == '\'') {
|
|
op_type = OP_CONST;
|
|
SvIVX(tmpstr) = -1;
|
|
}
|
|
else if (term == '`') {
|
|
op_type = OP_BACKTICK;
|
|
SvIVX(tmpstr) = '\\';
|
|
}
|
|
|
|
CLINE;
|
|
PL_multi_start = PL_curcop->cop_line;
|
|
PL_multi_open = PL_multi_close = '<';
|
|
term = *PL_tokenbuf;
|
|
if (PL_lex_inwhat == OP_SUBST && PL_in_eval && !PL_rsfp) {
|
|
char *bufptr = PL_super_bufptr;
|
|
char *bufend = PL_super_bufend;
|
|
char *olds = s - SvCUR(herewas);
|
|
s = strchr(bufptr, '\n');
|
|
if (!s)
|
|
s = bufend;
|
|
d = s;
|
|
while (s < bufend &&
|
|
(*s != term || memNE(s,PL_tokenbuf,len)) ) {
|
|
if (*s++ == '\n')
|
|
PL_curcop->cop_line++;
|
|
}
|
|
if (s >= bufend) {
|
|
PL_curcop->cop_line = PL_multi_start;
|
|
missingterm(PL_tokenbuf);
|
|
}
|
|
sv_setpvn(herewas,bufptr,d-bufptr+1);
|
|
sv_setpvn(tmpstr,d+1,s-d);
|
|
s += len - 1;
|
|
sv_catpvn(herewas,s,bufend-s);
|
|
(void)strcpy(bufptr,SvPVX(herewas));
|
|
|
|
s = olds;
|
|
goto retval;
|
|
}
|
|
else if (!outer) {
|
|
d = s;
|
|
while (s < PL_bufend &&
|
|
(*s != term || memNE(s,PL_tokenbuf,len)) ) {
|
|
if (*s++ == '\n')
|
|
PL_curcop->cop_line++;
|
|
}
|
|
if (s >= PL_bufend) {
|
|
PL_curcop->cop_line = PL_multi_start;
|
|
missingterm(PL_tokenbuf);
|
|
}
|
|
sv_setpvn(tmpstr,d+1,s-d);
|
|
s += len - 1;
|
|
PL_curcop->cop_line++; /* the preceding stmt passes a newline */
|
|
|
|
sv_catpvn(herewas,s,PL_bufend-s);
|
|
sv_setsv(PL_linestr,herewas);
|
|
PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart = SvPVX(PL_linestr);
|
|
PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
|
|
}
|
|
else
|
|
sv_setpvn(tmpstr,"",0); /* avoid "uninitialized" warning */
|
|
while (s >= PL_bufend) { /* multiple line string? */
|
|
if (!outer ||
|
|
!(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
|
|
PL_curcop->cop_line = PL_multi_start;
|
|
missingterm(PL_tokenbuf);
|
|
}
|
|
PL_curcop->cop_line++;
|
|
PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
|
|
#ifndef PERL_STRICT_CR
|
|
if (PL_bufend - PL_linestart >= 2) {
|
|
if ((PL_bufend[-2] == '\r' && PL_bufend[-1] == '\n') ||
|
|
(PL_bufend[-2] == '\n' && PL_bufend[-1] == '\r'))
|
|
{
|
|
PL_bufend[-2] = '\n';
|
|
PL_bufend--;
|
|
SvCUR_set(PL_linestr, PL_bufend - SvPVX(PL_linestr));
|
|
}
|
|
else if (PL_bufend[-1] == '\r')
|
|
PL_bufend[-1] = '\n';
|
|
}
|
|
else if (PL_bufend - PL_linestart == 1 && PL_bufend[-1] == '\r')
|
|
PL_bufend[-1] = '\n';
|
|
#endif
|
|
if (PERLDB_LINE && PL_curstash != PL_debstash) {
|
|
SV *sv = NEWSV(88,0);
|
|
|
|
sv_upgrade(sv, SVt_PVMG);
|
|
sv_setsv(sv,PL_linestr);
|
|
av_store(GvAV(PL_curcop->cop_filegv),
|
|
(I32)PL_curcop->cop_line,sv);
|
|
}
|
|
if (*s == term && memEQ(s,PL_tokenbuf,len)) {
|
|
s = PL_bufend - 1;
|
|
*s = ' ';
|
|
sv_catsv(PL_linestr,herewas);
|
|
PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
|
|
}
|
|
else {
|
|
s = PL_bufend;
|
|
sv_catsv(tmpstr,PL_linestr);
|
|
}
|
|
}
|
|
s++;
|
|
retval:
|
|
PL_multi_end = PL_curcop->cop_line;
|
|
if (SvCUR(tmpstr) + 5 < SvLEN(tmpstr)) {
|
|
SvLEN_set(tmpstr, SvCUR(tmpstr) + 1);
|
|
Renew(SvPVX(tmpstr), SvLEN(tmpstr), char);
|
|
}
|
|
SvREFCNT_dec(herewas);
|
|
PL_lex_stuff = tmpstr;
|
|
yylval.ival = op_type;
|
|
return s;
|
|
}
|
|
|
|
/* scan_inputsymbol
|
|
takes: current position in input buffer
|
|
returns: new position in input buffer
|
|
side-effects: yylval and lex_op are set.
|
|
|
|
This code handles:
|
|
|
|
<> read from ARGV
|
|
<FH> read from filehandle
|
|
<pkg::FH> read from package qualified filehandle
|
|
<pkg'FH> read from package qualified filehandle
|
|
<$fh> read from filehandle in $fh
|
|
<*.h> filename glob
|
|
|
|
*/
|
|
|
|
STATIC char *
|
|
scan_inputsymbol(char *start)
|
|
{
|
|
register char *s = start; /* current position in buffer */
|
|
register char *d;
|
|
register char *e;
|
|
I32 len;
|
|
|
|
d = PL_tokenbuf; /* start of temp holding space */
|
|
e = PL_tokenbuf + sizeof PL_tokenbuf; /* end of temp holding space */
|
|
s = delimcpy(d, e, s + 1, PL_bufend, '>', &len); /* extract until > */
|
|
|
|
/* die if we didn't have space for the contents of the <>,
|
|
or if it didn't end
|
|
*/
|
|
|
|
if (len >= sizeof PL_tokenbuf)
|
|
croak("Excessively long <> operator");
|
|
if (s >= PL_bufend)
|
|
croak("Unterminated <> operator");
|
|
|
|
s++;
|
|
|
|
/* check for <$fh>
|
|
Remember, only scalar variables are interpreted as filehandles by
|
|
this code. Anything more complex (e.g., <$fh{$num}>) will be
|
|
treated as a glob() call.
|
|
This code makes use of the fact that except for the $ at the front,
|
|
a scalar variable and a filehandle look the same.
|
|
*/
|
|
if (*d == '$' && d[1]) d++;
|
|
|
|
/* allow <Pkg'VALUE> or <Pkg::VALUE> */
|
|
while (*d && (isALNUM(*d) || *d == '\'' || *d == ':'))
|
|
d++;
|
|
|
|
/* If we've tried to read what we allow filehandles to look like, and
|
|
there's still text left, then it must be a glob() and not a getline.
|
|
Use scan_str to pull out the stuff between the <> and treat it
|
|
as nothing more than a string.
|
|
*/
|
|
|
|
if (d - PL_tokenbuf != len) {
|
|
yylval.ival = OP_GLOB;
|
|
set_csh();
|
|
s = scan_str(start);
|
|
if (!s)
|
|
croak("Glob not terminated");
|
|
return s;
|
|
}
|
|
else {
|
|
/* we're in a filehandle read situation */
|
|
d = PL_tokenbuf;
|
|
|
|
/* turn <> into <ARGV> */
|
|
if (!len)
|
|
(void)strcpy(d,"ARGV");
|
|
|
|
/* if <$fh>, create the ops to turn the variable into a
|
|
filehandle
|
|
*/
|
|
if (*d == '$') {
|
|
I32 tmp;
|
|
|
|
/* try to find it in the pad for this block, otherwise find
|
|
add symbol table ops
|
|
*/
|
|
if ((tmp = pad_findmy(d)) != NOT_IN_PAD) {
|
|
OP *o = newOP(OP_PADSV, 0);
|
|
o->op_targ = tmp;
|
|
PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newUNOP(OP_RV2GV, 0, o));
|
|
}
|
|
else {
|
|
GV *gv = gv_fetchpv(d+1,TRUE, SVt_PV);
|
|
PL_lex_op = (OP*)newUNOP(OP_READLINE, 0,
|
|
newUNOP(OP_RV2GV, 0,
|
|
newUNOP(OP_RV2SV, 0,
|
|
newGVOP(OP_GV, 0, gv))));
|
|
}
|
|
/* we created the ops in lex_op, so make yylval.ival a null op */
|
|
yylval.ival = OP_NULL;
|
|
}
|
|
|
|
/* If it's none of the above, it must be a literal filehandle
|
|
(<Foo::BAR> or <FOO>) so build a simple readline OP */
|
|
else {
|
|
GV *gv = gv_fetchpv(d,TRUE, SVt_PVIO);
|
|
PL_lex_op = (OP*)newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, gv));
|
|
yylval.ival = OP_NULL;
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
|
|
/* scan_str
|
|
takes: start position in buffer
|
|
returns: position to continue reading from buffer
|
|
side-effects: multi_start, multi_close, lex_repl or lex_stuff, and
|
|
updates the read buffer.
|
|
|
|
This subroutine pulls a string out of the input. It is called for:
|
|
q single quotes q(literal text)
|
|
' single quotes 'literal text'
|
|
qq double quotes qq(interpolate $here please)
|
|
" double quotes "interpolate $here please"
|
|
qx backticks qx(/bin/ls -l)
|
|
` backticks `/bin/ls -l`
|
|
qw quote words @EXPORT_OK = qw( func() $spam )
|
|
m// regexp match m/this/
|
|
s/// regexp substitute s/this/that/
|
|
tr/// string transliterate tr/this/that/
|
|
y/// string transliterate y/this/that/
|
|
($*@) sub prototypes sub foo ($)
|
|
<> readline or globs <FOO>, <>, <$fh>, or <*.c>
|
|
|
|
In most of these cases (all but <>, patterns and transliterate)
|
|
yylex() calls scan_str(). m// makes yylex() call scan_pat() which
|
|
calls scan_str(). s/// makes yylex() call scan_subst() which calls
|
|
scan_str(). tr/// and y/// make yylex() call scan_trans() which
|
|
calls scan_str().
|
|
|
|
It skips whitespace before the string starts, and treats the first
|
|
character as the delimiter. If the delimiter is one of ([{< then
|
|
the corresponding "close" character )]}> is used as the closing
|
|
delimiter. It allows quoting of delimiters, and if the string has
|
|
balanced delimiters ([{<>}]) it allows nesting.
|
|
|
|
The lexer always reads these strings into lex_stuff, except in the
|
|
case of the operators which take *two* arguments (s/// and tr///)
|
|
when it checks to see if lex_stuff is full (presumably with the 1st
|
|
arg to s or tr) and if so puts the string into lex_repl.
|
|
|
|
*/
|
|
|
|
STATIC char *
|
|
scan_str(char *start)
|
|
{
|
|
dTHR;
|
|
SV *sv; /* scalar value: string */
|
|
char *tmps; /* temp string, used for delimiter matching */
|
|
register char *s = start; /* current position in the buffer */
|
|
register char term; /* terminating character */
|
|
register char *to; /* current position in the sv's data */
|
|
I32 brackets = 1; /* bracket nesting level */
|
|
|
|
/* skip space before the delimiter */
|
|
if (isSPACE(*s))
|
|
s = skipspace(s);
|
|
|
|
/* mark where we are, in case we need to report errors */
|
|
CLINE;
|
|
|
|
/* after skipping whitespace, the next character is the terminator */
|
|
term = *s;
|
|
/* mark where we are */
|
|
PL_multi_start = PL_curcop->cop_line;
|
|
PL_multi_open = term;
|
|
|
|
/* find corresponding closing delimiter */
|
|
if (term && (tmps = strchr("([{< )]}> )]}>",term)))
|
|
term = tmps[5];
|
|
PL_multi_close = term;
|
|
|
|
/* create a new SV to hold the contents. 87 is leak category, I'm
|
|
assuming. 79 is the SV's initial length. What a random number. */
|
|
sv = NEWSV(87,79);
|
|
sv_upgrade(sv, SVt_PVIV);
|
|
SvIVX(sv) = term;
|
|
(void)SvPOK_only(sv); /* validate pointer */
|
|
|
|
/* move past delimiter and try to read a complete string */
|
|
s++;
|
|
for (;;) {
|
|
/* extend sv if need be */
|
|
SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1);
|
|
/* set 'to' to the next character in the sv's string */
|
|
to = SvPVX(sv)+SvCUR(sv);
|
|
|
|
/* if open delimiter is the close delimiter read unbridle */
|
|
if (PL_multi_open == PL_multi_close) {
|
|
for (; s < PL_bufend; s++,to++) {
|
|
/* embedded newlines increment the current line number */
|
|
if (*s == '\n' && !PL_rsfp)
|
|
PL_curcop->cop_line++;
|
|
/* handle quoted delimiters */
|
|
if (*s == '\\' && s+1 < PL_bufend && term != '\\') {
|
|
if (s[1] == term)
|
|
s++;
|
|
/* any other quotes are simply copied straight through */
|
|
else
|
|
*to++ = *s++;
|
|
}
|
|
/* terminate when run out of buffer (the for() condition), or
|
|
have found the terminator */
|
|
else if (*s == term)
|
|
break;
|
|
*to = *s;
|
|
}
|
|
}
|
|
|
|
/* if the terminator isn't the same as the start character (e.g.,
|
|
matched brackets), we have to allow more in the quoting, and
|
|
be prepared for nested brackets.
|
|
*/
|
|
else {
|
|
/* read until we run out of string, or we find the terminator */
|
|
for (; s < PL_bufend; s++,to++) {
|
|
/* embedded newlines increment the line count */
|
|
if (*s == '\n' && !PL_rsfp)
|
|
PL_curcop->cop_line++;
|
|
/* backslashes can escape the open or closing characters */
|
|
if (*s == '\\' && s+1 < PL_bufend) {
|
|
if ((s[1] == PL_multi_open) || (s[1] == PL_multi_close))
|
|
s++;
|
|
else
|
|
*to++ = *s++;
|
|
}
|
|
/* allow nested opens and closes */
|
|
else if (*s == PL_multi_close && --brackets <= 0)
|
|
break;
|
|
else if (*s == PL_multi_open)
|
|
brackets++;
|
|
*to = *s;
|
|
}
|
|
}
|
|
/* terminate the copied string and update the sv's end-of-string */
|
|
*to = '\0';
|
|
SvCUR_set(sv, to - SvPVX(sv));
|
|
|
|
/*
|
|
* this next chunk reads more into the buffer if we're not done yet
|
|
*/
|
|
|
|
if (s < PL_bufend) break; /* handle case where we are done yet :-) */
|
|
|
|
#ifndef PERL_STRICT_CR
|
|
if (to - SvPVX(sv) >= 2) {
|
|
if ((to[-2] == '\r' && to[-1] == '\n') ||
|
|
(to[-2] == '\n' && to[-1] == '\r'))
|
|
{
|
|
to[-2] = '\n';
|
|
to--;
|
|
SvCUR_set(sv, to - SvPVX(sv));
|
|
}
|
|
else if (to[-1] == '\r')
|
|
to[-1] = '\n';
|
|
}
|
|
else if (to - SvPVX(sv) == 1 && to[-1] == '\r')
|
|
to[-1] = '\n';
|
|
#endif
|
|
|
|
/* if we're out of file, or a read fails, bail and reset the current
|
|
line marker so we can report where the unterminated string began
|
|
*/
|
|
if (!PL_rsfp ||
|
|
!(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) {
|
|
sv_free(sv);
|
|
PL_curcop->cop_line = PL_multi_start;
|
|
return Nullch;
|
|
}
|
|
/* we read a line, so increment our line counter */
|
|
PL_curcop->cop_line++;
|
|
|
|
/* update debugger info */
|
|
if (PERLDB_LINE && PL_curstash != PL_debstash) {
|
|
SV *sv = NEWSV(88,0);
|
|
|
|
sv_upgrade(sv, SVt_PVMG);
|
|
sv_setsv(sv,PL_linestr);
|
|
av_store(GvAV(PL_curcop->cop_filegv),
|
|
(I32)PL_curcop->cop_line, sv);
|
|
}
|
|
|
|
/* having changed the buffer, we must update PL_bufend */
|
|
PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
|
|
}
|
|
|
|
/* at this point, we have successfully read the delimited string */
|
|
|
|
PL_multi_end = PL_curcop->cop_line;
|
|
s++;
|
|
|
|
/* if we allocated too much space, give some back */
|
|
if (SvCUR(sv) + 5 < SvLEN(sv)) {
|
|
SvLEN_set(sv, SvCUR(sv) + 1);
|
|
Renew(SvPVX(sv), SvLEN(sv), char);
|
|
}
|
|
|
|
/* decide whether this is the first or second quoted string we've read
|
|
for this op
|
|
*/
|
|
|
|
if (PL_lex_stuff)
|
|
PL_lex_repl = sv;
|
|
else
|
|
PL_lex_stuff = sv;
|
|
return s;
|
|
}
|
|
|
|
/*
|
|
scan_num
|
|
takes: pointer to position in buffer
|
|
returns: pointer to new position in buffer
|
|
side-effects: builds ops for the constant in yylval.op
|
|
|
|
Read a number in any of the formats that Perl accepts:
|
|
|
|
0(x[0-7A-F]+)|([0-7]+)
|
|
[\d_]+(\.[\d_]*)?[Ee](\d+)
|
|
|
|
Underbars (_) are allowed in decimal numbers. If -w is on,
|
|
underbars before a decimal point must be at three digit intervals.
|
|
|
|
Like most scan_ routines, it uses the PL_tokenbuf buffer to hold the
|
|
thing it reads.
|
|
|
|
If it reads a number without a decimal point or an exponent, it will
|
|
try converting the number to an integer and see if it can do so
|
|
without loss of precision.
|
|
*/
|
|
|
|
char *
|
|
scan_num(char *start)
|
|
{
|
|
register char *s = start; /* current position in buffer */
|
|
register char *d; /* destination in temp buffer */
|
|
register char *e; /* end of temp buffer */
|
|
I32 tryiv; /* used to see if it can be an int */
|
|
double value; /* number read, as a double */
|
|
SV *sv; /* place to put the converted number */
|
|
I32 floatit; /* boolean: int or float? */
|
|
char *lastub = 0; /* position of last underbar */
|
|
static char number_too_long[] = "Number too long";
|
|
|
|
/* We use the first character to decide what type of number this is */
|
|
|
|
switch (*s) {
|
|
default:
|
|
croak("panic: scan_num");
|
|
|
|
/* if it starts with a 0, it could be an octal number, a decimal in
|
|
0.13 disguise, or a hexadecimal number.
|
|
*/
|
|
case '0':
|
|
{
|
|
/* variables:
|
|
u holds the "number so far"
|
|
shift the power of 2 of the base (hex == 4, octal == 3)
|
|
overflowed was the number more than we can hold?
|
|
|
|
Shift is used when we add a digit. It also serves as an "are
|
|
we in octal or hex?" indicator to disallow hex characters when
|
|
in octal mode.
|
|
*/
|
|
UV u;
|
|
I32 shift;
|
|
bool overflowed = FALSE;
|
|
|
|
/* check for hex */
|
|
if (s[1] == 'x') {
|
|
shift = 4;
|
|
s += 2;
|
|
}
|
|
/* check for a decimal in disguise */
|
|
else if (s[1] == '.')
|
|
goto decimal;
|
|
/* so it must be octal */
|
|
else
|
|
shift = 3;
|
|
u = 0;
|
|
|
|
/* read the rest of the octal number */
|
|
for (;;) {
|
|
UV n, b; /* n is used in the overflow test, b is the digit we're adding on */
|
|
|
|
switch (*s) {
|
|
|
|
/* if we don't mention it, we're done */
|
|
default:
|
|
goto out;
|
|
|
|
/* _ are ignored */
|
|
case '_':
|
|
s++;
|
|
break;
|
|
|
|
/* 8 and 9 are not octal */
|
|
case '8': case '9':
|
|
if (shift != 4)
|
|
yyerror("Illegal octal digit");
|
|
/* FALL THROUGH */
|
|
|
|
/* octal digits */
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7':
|
|
b = *s++ & 15; /* ASCII digit -> value of digit */
|
|
goto digit;
|
|
|
|
/* hex digits */
|
|
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
|
|
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
|
|
/* make sure they said 0x */
|
|
if (shift != 4)
|
|
goto out;
|
|
b = (*s++ & 7) + 9;
|
|
|
|
/* Prepare to put the digit we have onto the end
|
|
of the number so far. We check for overflows.
|
|
*/
|
|
|
|
digit:
|
|
n = u << shift; /* make room for the digit */
|
|
if (!overflowed && (n >> shift) != u
|
|
&& !(PL_hints & HINT_NEW_BINARY)) {
|
|
warn("Integer overflow in %s number",
|
|
(shift == 4) ? "hex" : "octal");
|
|
overflowed = TRUE;
|
|
}
|
|
u = n | b; /* add the digit to the end */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* if we get here, we had success: make a scalar value from
|
|
the number.
|
|
*/
|
|
out:
|
|
sv = NEWSV(92,0);
|
|
sv_setuv(sv, u);
|
|
if ( PL_hints & HINT_NEW_BINARY)
|
|
sv = new_constant(start, s - start, "binary", sv, Nullsv, NULL);
|
|
}
|
|
break;
|
|
|
|
/*
|
|
handle decimal numbers.
|
|
we're also sent here when we read a 0 as the first digit
|
|
*/
|
|
case '1': case '2': case '3': case '4': case '5':
|
|
case '6': case '7': case '8': case '9': case '.':
|
|
decimal:
|
|
d = PL_tokenbuf;
|
|
e = PL_tokenbuf + sizeof PL_tokenbuf - 6; /* room for various punctuation */
|
|
floatit = FALSE;
|
|
|
|
/* read next group of digits and _ and copy into d */
|
|
while (isDIGIT(*s) || *s == '_') {
|
|
/* skip underscores, checking for misplaced ones
|
|
if -w is on
|
|
*/
|
|
if (*s == '_') {
|
|
if (PL_dowarn && lastub && s - lastub != 3)
|
|
warn("Misplaced _ in number");
|
|
lastub = ++s;
|
|
}
|
|
else {
|
|
/* check for end of fixed-length buffer */
|
|
if (d >= e)
|
|
croak(number_too_long);
|
|
/* if we're ok, copy the character */
|
|
*d++ = *s++;
|
|
}
|
|
}
|
|
|
|
/* final misplaced underbar check */
|
|
if (PL_dowarn && lastub && s - lastub != 3)
|
|
warn("Misplaced _ in number");
|
|
|
|
/* read a decimal portion if there is one. avoid
|
|
3..5 being interpreted as the number 3. followed
|
|
by .5
|
|
*/
|
|
if (*s == '.' && s[1] != '.') {
|
|
floatit = TRUE;
|
|
*d++ = *s++;
|
|
|
|
/* copy, ignoring underbars, until we run out of
|
|
digits. Note: no misplaced underbar checks!
|
|
*/
|
|
for (; isDIGIT(*s) || *s == '_'; s++) {
|
|
/* fixed length buffer check */
|
|
if (d >= e)
|
|
croak(number_too_long);
|
|
if (*s != '_')
|
|
*d++ = *s;
|
|
}
|
|
}
|
|
|
|
/* read exponent part, if present */
|
|
if (*s && strchr("eE",*s) && strchr("+-0123456789",s[1])) {
|
|
floatit = TRUE;
|
|
s++;
|
|
|
|
/* regardless of whether user said 3E5 or 3e5, use lower 'e' */
|
|
*d++ = 'e'; /* At least some Mach atof()s don't grok 'E' */
|
|
|
|
/* allow positive or negative exponent */
|
|
if (*s == '+' || *s == '-')
|
|
*d++ = *s++;
|
|
|
|
/* read digits of exponent (no underbars :-) */
|
|
while (isDIGIT(*s)) {
|
|
if (d >= e)
|
|
croak(number_too_long);
|
|
*d++ = *s++;
|
|
}
|
|
}
|
|
|
|
/* terminate the string */
|
|
*d = '\0';
|
|
|
|
/* make an sv from the string */
|
|
sv = NEWSV(92,0);
|
|
/* reset numeric locale in case we were earlier left in Swaziland */
|
|
SET_NUMERIC_STANDARD();
|
|
value = atof(PL_tokenbuf);
|
|
|
|
/*
|
|
See if we can make do with an integer value without loss of
|
|
precision. We use I_V to cast to an int, because some
|
|
compilers have issues. Then we try casting it back and see
|
|
if it was the same. We only do this if we know we
|
|
specifically read an integer.
|
|
|
|
Note: if floatit is true, then we don't need to do the
|
|
conversion at all.
|
|
*/
|
|
tryiv = I_V(value);
|
|
if (!floatit && (double)tryiv == value)
|
|
sv_setiv(sv, tryiv);
|
|
else
|
|
sv_setnv(sv, value);
|
|
if ( floatit ? (PL_hints & HINT_NEW_FLOAT) : (PL_hints & HINT_NEW_INTEGER) )
|
|
sv = new_constant(PL_tokenbuf, d - PL_tokenbuf,
|
|
(floatit ? "float" : "integer"), sv, Nullsv, NULL);
|
|
break;
|
|
}
|
|
|
|
/* make the op for the constant and return */
|
|
|
|
yylval.opval = newSVOP(OP_CONST, 0, sv);
|
|
|
|
return s;
|
|
}
|
|
|
|
STATIC char *
|
|
scan_formline(register char *s)
|
|
{
|
|
dTHR;
|
|
register char *eol;
|
|
register char *t;
|
|
SV *stuff = newSVpv("",0);
|
|
bool needargs = FALSE;
|
|
|
|
while (!needargs) {
|
|
if (*s == '.' || *s == '}') {
|
|
/*SUPPRESS 530*/
|
|
#ifdef PERL_STRICT_CR
|
|
for (t = s+1;*t == ' ' || *t == '\t'; t++) ;
|
|
#else
|
|
for (t = s+1;*t == ' ' || *t == '\t' || *t == '\r'; t++) ;
|
|
#endif
|
|
if (*t == '\n' || t == PL_bufend)
|
|
break;
|
|
}
|
|
if (PL_in_eval && !PL_rsfp) {
|
|
eol = strchr(s,'\n');
|
|
if (!eol++)
|
|
eol = PL_bufend;
|
|
}
|
|
else
|
|
eol = PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
|
|
if (*s != '#') {
|
|
for (t = s; t < eol; t++) {
|
|
if (*t == '~' && t[1] == '~' && SvCUR(stuff)) {
|
|
needargs = FALSE;
|
|
goto enough; /* ~~ must be first line in formline */
|
|
}
|
|
if (*t == '@' || *t == '^')
|
|
needargs = TRUE;
|
|
}
|
|
sv_catpvn(stuff, s, eol-s);
|
|
}
|
|
s = eol;
|
|
if (PL_rsfp) {
|
|
s = filter_gets(PL_linestr, PL_rsfp, 0);
|
|
PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = PL_linestart = SvPVX(PL_linestr);
|
|
PL_bufend = PL_bufptr + SvCUR(PL_linestr);
|
|
if (!s) {
|
|
s = PL_bufptr;
|
|
yyerror("Format not terminated");
|
|
break;
|
|
}
|
|
}
|
|
incline(s);
|
|
}
|
|
enough:
|
|
if (SvCUR(stuff)) {
|
|
PL_expect = XTERM;
|
|
if (needargs) {
|
|
PL_lex_state = LEX_NORMAL;
|
|
PL_nextval[PL_nexttoke].ival = 0;
|
|
force_next(',');
|
|
}
|
|
else
|
|
PL_lex_state = LEX_FORMLINE;
|
|
PL_nextval[PL_nexttoke].opval = (OP*)newSVOP(OP_CONST, 0, stuff);
|
|
force_next(THING);
|
|
PL_nextval[PL_nexttoke].ival = OP_FORMLINE;
|
|
force_next(LSTOP);
|
|
}
|
|
else {
|
|
SvREFCNT_dec(stuff);
|
|
PL_lex_formbrack = 0;
|
|
PL_bufptr = s;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
STATIC void
|
|
set_csh(void)
|
|
{
|
|
#ifdef CSH
|
|
if (!PL_cshlen)
|
|
PL_cshlen = strlen(PL_cshname);
|
|
#endif
|
|
}
|
|
|
|
I32
|
|
start_subparse(I32 is_format, U32 flags)
|
|
{
|
|
dTHR;
|
|
I32 oldsavestack_ix = PL_savestack_ix;
|
|
CV* outsidecv = PL_compcv;
|
|
AV* comppadlist;
|
|
|
|
if (PL_compcv) {
|
|
assert(SvTYPE(PL_compcv) == SVt_PVCV);
|
|
}
|
|
save_I32(&PL_subline);
|
|
save_item(PL_subname);
|
|
SAVEI32(PL_padix);
|
|
SAVESPTR(PL_curpad);
|
|
SAVESPTR(PL_comppad);
|
|
SAVESPTR(PL_comppad_name);
|
|
SAVESPTR(PL_compcv);
|
|
SAVEI32(PL_comppad_name_fill);
|
|
SAVEI32(PL_min_intro_pending);
|
|
SAVEI32(PL_max_intro_pending);
|
|
SAVEI32(PL_pad_reset_pending);
|
|
|
|
PL_compcv = (CV*)NEWSV(1104,0);
|
|
sv_upgrade((SV *)PL_compcv, is_format ? SVt_PVFM : SVt_PVCV);
|
|
CvFLAGS(PL_compcv) |= flags;
|
|
|
|
PL_comppad = newAV();
|
|
av_push(PL_comppad, Nullsv);
|
|
PL_curpad = AvARRAY(PL_comppad);
|
|
PL_comppad_name = newAV();
|
|
PL_comppad_name_fill = 0;
|
|
PL_min_intro_pending = 0;
|
|
PL_padix = 0;
|
|
PL_subline = PL_curcop->cop_line;
|
|
#ifdef USE_THREADS
|
|
av_store(PL_comppad_name, 0, newSVpv("@_", 2));
|
|
PL_curpad[0] = (SV*)newAV();
|
|
SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
|
|
#endif /* USE_THREADS */
|
|
|
|
comppadlist = newAV();
|
|
AvREAL_off(comppadlist);
|
|
av_store(comppadlist, 0, (SV*)PL_comppad_name);
|
|
av_store(comppadlist, 1, (SV*)PL_comppad);
|
|
|
|
CvPADLIST(PL_compcv) = comppadlist;
|
|
CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(outsidecv);
|
|
#ifdef USE_THREADS
|
|
CvOWNER(PL_compcv) = 0;
|
|
New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
|
|
MUTEX_INIT(CvMUTEXP(PL_compcv));
|
|
#endif /* USE_THREADS */
|
|
|
|
return oldsavestack_ix;
|
|
}
|
|
|
|
int
|
|
yywarn(char *s)
|
|
{
|
|
dTHR;
|
|
--PL_error_count;
|
|
PL_in_eval |= 2;
|
|
yyerror(s);
|
|
PL_in_eval &= ~2;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
yyerror(char *s)
|
|
{
|
|
dTHR;
|
|
char *where = NULL;
|
|
char *context = NULL;
|
|
int contlen = -1;
|
|
SV *msg;
|
|
|
|
if (!yychar || (yychar == ';' && !PL_rsfp))
|
|
where = "at EOF";
|
|
else if (PL_bufptr > PL_oldoldbufptr && PL_bufptr - PL_oldoldbufptr < 200 &&
|
|
PL_oldoldbufptr != PL_oldbufptr && PL_oldbufptr != PL_bufptr) {
|
|
while (isSPACE(*PL_oldoldbufptr))
|
|
PL_oldoldbufptr++;
|
|
context = PL_oldoldbufptr;
|
|
contlen = PL_bufptr - PL_oldoldbufptr;
|
|
}
|
|
else if (PL_bufptr > PL_oldbufptr && PL_bufptr - PL_oldbufptr < 200 &&
|
|
PL_oldbufptr != PL_bufptr) {
|
|
while (isSPACE(*PL_oldbufptr))
|
|
PL_oldbufptr++;
|
|
context = PL_oldbufptr;
|
|
contlen = PL_bufptr - PL_oldbufptr;
|
|
}
|
|
else if (yychar > 255)
|
|
where = "next token ???";
|
|
else if ((yychar & 127) == 127) {
|
|
if (PL_lex_state == LEX_NORMAL ||
|
|
(PL_lex_state == LEX_KNOWNEXT && PL_lex_defer == LEX_NORMAL))
|
|
where = "at end of line";
|
|
else if (PL_lex_inpat)
|
|
where = "within pattern";
|
|
else
|
|
where = "within string";
|
|
}
|
|
else {
|
|
SV *where_sv = sv_2mortal(newSVpv("next char ", 0));
|
|
if (yychar < 32)
|
|
sv_catpvf(where_sv, "^%c", toCTRL(yychar));
|
|
else if (isPRINT_LC(yychar))
|
|
sv_catpvf(where_sv, "%c", yychar);
|
|
else
|
|
sv_catpvf(where_sv, "\\%03o", yychar & 255);
|
|
where = SvPVX(where_sv);
|
|
}
|
|
msg = sv_2mortal(newSVpv(s, 0));
|
|
sv_catpvf(msg, " at %_ line %ld, ",
|
|
GvSV(PL_curcop->cop_filegv), (long)PL_curcop->cop_line);
|
|
if (context)
|
|
sv_catpvf(msg, "near \"%.*s\"\n", contlen, context);
|
|
else
|
|
sv_catpvf(msg, "%s\n", where);
|
|
if (PL_multi_start < PL_multi_end && (U32)(PL_curcop->cop_line - PL_multi_end) <= 1) {
|
|
sv_catpvf(msg,
|
|
" (Might be a runaway multi-line %c%c string starting on line %ld)\n",
|
|
(int)PL_multi_open,(int)PL_multi_close,(long)PL_multi_start);
|
|
PL_multi_end = 0;
|
|
}
|
|
if (PL_in_eval & 2)
|
|
warn("%_", msg);
|
|
else if (PL_in_eval)
|
|
sv_catsv(ERRSV, msg);
|
|
else
|
|
PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
|
|
if (++PL_error_count >= 10)
|
|
croak("%_ has too many errors.\n", GvSV(PL_curcop->cop_filegv));
|
|
PL_in_my = 0;
|
|
PL_in_my_stash = Nullhv;
|
|
return 0;
|
|
}
|
|
|
|
|