f68a53dba9
In the merge of 20210215, I left two merge conflicts #if 0'd by mistake to check later rather than resolve them as part of the merge. This code turns out to be from the original one-true-awk import and not FreeBSD specific, so remove them. Remove a extra definition of HAT. Remove a stylistic change that also appears to be a mismerge along the way. Remove FREEBSD-upgrade. Nobody has updated it since the original 2007 cvs import. It talks about old CVS branches that never made it into svn, let alone git. New imports will follow the standard practices now, so there's nothing left to document. Move README to README.md and copy the README.md from upstream over. This leaves just the $FreeBSD$ lines (which remain for the stable/12 merge) and the strcoll part of ru@'s r201989/d98dd8e5f94c as the only diffs with upstream. FreeBSD also still has its own man page, which I don't plan on changing. Once this commit is merged to stable/12, I plan no further merges to stable/12. Sometime after that I'll remove the $FreeBSD$ lines to reduce the diffs even more (though i want to make sure plans won't change first). I also plan to talk to upstream about this change... MFC After: 2 weeks Sponsored by: Netflix
267 lines
7.2 KiB
C
267 lines
7.2 KiB
C
/****************************************************************
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Copyright (C) Lucent Technologies 1997
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name Lucent Technologies or any of
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its entities not be used in advertising or publicity pertaining
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to distribution of the software without specific, written prior
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permission.
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LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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****************************************************************/
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#include <assert.h>
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#include <stdint.h>
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#include <stdbool.h>
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#if __STDC_VERSION__ <= 199901L
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#define noreturn
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#else
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#include <stdnoreturn.h>
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#endif
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typedef double Awkfloat;
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/* unsigned char is more trouble than it's worth */
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typedef unsigned char uschar;
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#define xfree(a) { if ((a) != NULL) { free((void *)(intptr_t)(a)); (a) = NULL; } }
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/*
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* We sometimes cheat writing read-only pointers to NUL-terminate them
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* and then put back the original value
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*/
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#define setptr(ptr, a) (*(char *)(intptr_t)(ptr)) = (a)
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#define NN(p) ((p) ? (p) : "(null)") /* guaranteed non-null for DPRINTF
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*/
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#define DEBUG
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#ifdef DEBUG
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# define DPRINTF(...) if (dbg) printf(__VA_ARGS__)
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#else
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# define DPRINTF(...)
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#endif
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extern enum compile_states {
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RUNNING,
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COMPILING,
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ERROR_PRINTING
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} compile_time;
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extern bool safe; /* false => unsafe, true => safe */
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#define RECSIZE (8 * 1024) /* sets limit on records, fields, etc., etc. */
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extern int recsize; /* size of current record, orig RECSIZE */
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extern char EMPTY[]; /* this avoid -Wwritable-strings issues */
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extern char **FS;
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extern char **RS;
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extern char **ORS;
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extern char **OFS;
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extern char **OFMT;
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extern Awkfloat *NR;
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extern Awkfloat *FNR;
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extern Awkfloat *NF;
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extern char **FILENAME;
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extern char **SUBSEP;
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extern Awkfloat *RSTART;
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extern Awkfloat *RLENGTH;
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extern char *record; /* points to $0 */
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extern int lineno; /* line number in awk program */
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extern int errorflag; /* 1 if error has occurred */
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extern bool donefld; /* true if record broken into fields */
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extern bool donerec; /* true if record is valid (no fld has changed */
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extern int dbg;
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extern const char *patbeg; /* beginning of pattern matched */
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extern int patlen; /* length of pattern matched. set in b.c */
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/* Cell: all information about a variable or constant */
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typedef struct Cell {
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uschar ctype; /* OCELL, OBOOL, OJUMP, etc. */
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uschar csub; /* CCON, CTEMP, CFLD, etc. */
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char *nval; /* name, for variables only */
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char *sval; /* string value */
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Awkfloat fval; /* value as number */
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int tval; /* type info: STR|NUM|ARR|FCN|FLD|CON|DONTFREE|CONVC|CONVO */
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char *fmt; /* CONVFMT/OFMT value used to convert from number */
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struct Cell *cnext; /* ptr to next if chained */
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} Cell;
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typedef struct Array { /* symbol table array */
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int nelem; /* elements in table right now */
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int size; /* size of tab */
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Cell **tab; /* hash table pointers */
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} Array;
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#define NSYMTAB 50 /* initial size of a symbol table */
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extern Array *symtab;
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extern Cell *nrloc; /* NR */
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extern Cell *fnrloc; /* FNR */
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extern Cell *fsloc; /* FS */
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extern Cell *nfloc; /* NF */
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extern Cell *ofsloc; /* OFS */
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extern Cell *orsloc; /* ORS */
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extern Cell *rsloc; /* RS */
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extern Cell *rstartloc; /* RSTART */
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extern Cell *rlengthloc; /* RLENGTH */
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extern Cell *subseploc; /* SUBSEP */
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extern Cell *symtabloc; /* SYMTAB */
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/* Cell.tval values: */
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#define NUM 01 /* number value is valid */
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#define STR 02 /* string value is valid */
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#define DONTFREE 04 /* string space is not freeable */
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#define CON 010 /* this is a constant */
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#define ARR 020 /* this is an array */
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#define FCN 040 /* this is a function name */
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#define FLD 0100 /* this is a field $1, $2, ... */
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#define REC 0200 /* this is $0 */
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#define CONVC 0400 /* string was converted from number via CONVFMT */
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#define CONVO 01000 /* string was converted from number via OFMT */
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/* function types */
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#define FLENGTH 1
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#define FSQRT 2
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#define FEXP 3
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#define FLOG 4
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#define FINT 5
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#define FSYSTEM 6
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#define FRAND 7
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#define FSRAND 8
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#define FSIN 9
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#define FCOS 10
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#define FATAN 11
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#define FTOUPPER 12
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#define FTOLOWER 13
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#define FFLUSH 14
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#define FAND 15
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#define FFOR 16
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#define FXOR 17
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#define FCOMPL 18
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#define FLSHIFT 19
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#define FRSHIFT 20
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#define FSYSTIME 21
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#define FSTRFTIME 22
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/* Node: parse tree is made of nodes, with Cell's at bottom */
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typedef struct Node {
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int ntype;
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struct Node *nnext;
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int lineno;
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int nobj;
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struct Node *narg[1]; /* variable: actual size set by calling malloc */
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} Node;
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#define NIL ((Node *) 0)
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extern Node *winner;
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extern Node *nullstat;
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extern Node *nullnode;
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/* ctypes */
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#define OCELL 1
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#define OBOOL 2
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#define OJUMP 3
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/* Cell subtypes: csub */
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#define CFREE 7
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#define CCOPY 6
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#define CCON 5
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#define CTEMP 4
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#define CNAME 3
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#define CVAR 2
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#define CFLD 1
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#define CUNK 0
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/* bool subtypes */
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#define BTRUE 11
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#define BFALSE 12
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/* jump subtypes */
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#define JEXIT 21
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#define JNEXT 22
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#define JBREAK 23
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#define JCONT 24
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#define JRET 25
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#define JNEXTFILE 26
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/* node types */
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#define NVALUE 1
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#define NSTAT 2
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#define NEXPR 3
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extern int pairstack[], paircnt;
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#define notlegal(n) (n <= FIRSTTOKEN || n >= LASTTOKEN || proctab[n-FIRSTTOKEN] == nullproc)
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#define isvalue(n) ((n)->ntype == NVALUE)
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#define isexpr(n) ((n)->ntype == NEXPR)
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#define isjump(n) ((n)->ctype == OJUMP)
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#define isexit(n) ((n)->csub == JEXIT)
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#define isbreak(n) ((n)->csub == JBREAK)
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#define iscont(n) ((n)->csub == JCONT)
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#define isnext(n) ((n)->csub == JNEXT || (n)->csub == JNEXTFILE)
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#define isret(n) ((n)->csub == JRET)
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#define isrec(n) ((n)->tval & REC)
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#define isfld(n) ((n)->tval & FLD)
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#define isstr(n) ((n)->tval & STR)
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#define isnum(n) ((n)->tval & NUM)
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#define isarr(n) ((n)->tval & ARR)
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#define isfcn(n) ((n)->tval & FCN)
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#define istrue(n) ((n)->csub == BTRUE)
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#define istemp(n) ((n)->csub == CTEMP)
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#define isargument(n) ((n)->nobj == ARG)
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/* #define freeable(p) (!((p)->tval & DONTFREE)) */
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#define freeable(p) ( ((p)->tval & (STR|DONTFREE)) == STR )
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/* structures used by regular expression matching machinery, mostly b.c: */
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#define NCHARS (256+3) /* 256 handles 8-bit chars; 128 does 7-bit */
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/* watch out in match(), etc. */
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#define HAT (NCHARS+2) /* matches ^ in regular expr */
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#define NSTATES 32
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typedef struct rrow {
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long ltype; /* long avoids pointer warnings on 64-bit */
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union {
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int i;
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Node *np;
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uschar *up;
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} lval; /* because Al stores a pointer in it! */
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int *lfollow;
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} rrow;
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typedef struct fa {
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unsigned int **gototab;
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uschar *out;
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uschar *restr;
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int **posns;
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int state_count;
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bool anchor;
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int use;
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int initstat;
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int curstat;
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int accept;
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struct rrow re[1]; /* variable: actual size set by calling malloc */
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} fa;
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#include "proto.h"
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