bc411549ba
and variable recognition. PR: standards/52972 Submitted by: Wartan Hachaturow <wart@tepkom.ru> Reviewed by: tjr (improved on original patch) Tested by: buildworld on CURRENT. MFC after: 6 weeks
132 lines
3.9 KiB
Plaintext
132 lines
3.9 KiB
Plaintext
%{
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)arith_lex.l 8.3 (Berkeley) 5/4/95";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "shell.h"
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#include "y.tab.h"
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#include "error.h"
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#include "var.h"
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#include "memalloc.h"
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extern char *arith_buf, *arith_startbuf;
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#undef YY_INPUT
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#define YY_INPUT(buf,result,max) \
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result = (*buf = *arith_buf++) ? 1 : YY_NULL;
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#define YY_NO_UNPUT
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%}
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%%
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[ \t\n] { ; }
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0x[a-fA-F0-9]+ {
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yylval.l_value = strtoarith_t(yytext, NULL, 16);
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return(ARITH_NUM);
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}
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0[0-7]+ {
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yylval.l_value = strtoarith_t(yytext, NULL, 8);
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return(ARITH_NUM);
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}
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[0-9]+ {
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yylval.l_value = strtoarith_t(yytext, NULL, 10);
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return(ARITH_NUM);
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}
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[A-Za-z][A-Za-z0-9_]* {
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/*
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* If variable doesn't exist, we should initialize
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* it to zero.
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*/
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char *temp;
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if (lookupvar(yytext) == NULL)
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setvarsafe(yytext, "0", 0);
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temp = (char *)ckmalloc(strlen(yytext) + 1);
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yylval.s_value = strcpy(temp, yytext);
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return(ARITH_VAR);
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}
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"(" { return(ARITH_LPAREN); }
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")" { return(ARITH_RPAREN); }
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"||" { return(ARITH_OR); }
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"&&" { return(ARITH_AND); }
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"|" { return(ARITH_BOR); }
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"^" { return(ARITH_BXOR); }
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"&" { return(ARITH_BAND); }
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"==" { return(ARITH_EQ); }
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"!=" { return(ARITH_NE); }
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">" { return(ARITH_GT); }
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">=" { return(ARITH_GE); }
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"<" { return(ARITH_LT); }
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"<=" { return(ARITH_LE); }
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"<<" { return(ARITH_LSHIFT); }
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">>" { return(ARITH_RSHIFT); }
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"*" { return(ARITH_MUL); }
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"/" { return(ARITH_DIV); }
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"%" { return(ARITH_REM); }
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"+" { return(ARITH_ADD); }
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"-" { return(ARITH_SUB); }
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"~" { return(ARITH_BNOT); }
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"!" { return(ARITH_NOT); }
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"=" { return(ARITH_ASSIGN); }
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"+=" { return(ARITH_ADDASSIGN); }
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"-=" { return(ARITH_SUBASSIGN); }
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"*=" { return(ARITH_MULASSIGN); }
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"/=" { return(ARITH_DIVASSIGN); }
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"%=" { return(ARITH_REMASSIGN); }
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">>=" { return(ARITH_RSHASSIGN); }
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"<<=" { return(ARITH_LSHASSIGN); }
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"&=" { return(ARITH_BANDASSIGN); }
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"^=" { return(ARITH_BXORASSIGN); }
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"|=" { return(ARITH_BORASSIGN); }
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. { error("arith: syntax error: \"%s\"\n", arith_startbuf); }
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%%
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void
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arith_lex_reset()
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{
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YY_NEW_FILE;
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}
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