1 /**************************************************************** 2 Copyright (C) Lucent Technologies 1997 3 All Rights Reserved 4 5 Permission to use, copy, modify, and distribute this software and 6 its documentation for any purpose and without fee is hereby 7 granted, provided that the above copyright notice appear in all 8 copies and that both that the copyright notice and this 9 permission notice and warranty disclaimer appear in supporting 10 documentation, and that the name Lucent Technologies or any of 11 its entities not be used in advertising or publicity pertaining 12 to distribution of the software without specific, written prior 13 permission. 14 15 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 16 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 17 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 18 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 20 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 21 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 22 THIS SOFTWARE. 23 ****************************************************************/ 24 25 #include <assert.h> 26 #include <stdint.h> 27 #include <stdbool.h> 28 #if __STDC_VERSION__ <= 199901L 29 #define noreturn 30 #else 31 #include <stdnoreturn.h> 32 #endif 33 34 typedef double Awkfloat; 35 36 /* unsigned char is more trouble than it's worth */ 37 38 typedef unsigned char uschar; 39 40 #define xfree(a) { free((void *)(intptr_t)(a)); (a) = NULL; } 41 /* 42 * We sometimes cheat writing read-only pointers to NUL-terminate them 43 * and then put back the original value 44 */ 45 #define setptr(ptr, a) (*(char *)(intptr_t)(ptr)) = (a) 46 47 #define NN(p) ((p) ? (p) : "(null)") /* guaranteed non-null for DPRINTF 48 */ 49 #define DEBUG 50 #ifdef DEBUG 51 # define DPRINTF(...) if (dbg) printf(__VA_ARGS__) 52 #else 53 # define DPRINTF(...) 54 #endif 55 56 extern enum compile_states { 57 RUNNING, 58 COMPILING, 59 ERROR_PRINTING 60 } compile_time; 61 62 extern bool safe; /* false => unsafe, true => safe */ 63 64 #define RECSIZE (8 * 1024) /* sets limit on records, fields, etc., etc. */ 65 extern int recsize; /* size of current record, orig RECSIZE */ 66 67 extern size_t awk_mb_cur_max; /* max size of a multi-byte character */ 68 69 extern char EMPTY[]; /* this avoid -Wwritable-strings issues */ 70 extern char **FS; 71 extern char **RS; 72 extern char **ORS; 73 extern char **OFS; 74 extern char **OFMT; 75 extern Awkfloat *NR; 76 extern Awkfloat *FNR; 77 extern Awkfloat *NF; 78 extern char **FILENAME; 79 extern char **SUBSEP; 80 extern Awkfloat *RSTART; 81 extern Awkfloat *RLENGTH; 82 83 extern bool CSV; /* true for csv input */ 84 85 extern char *record; /* points to $0 */ 86 extern int lineno; /* line number in awk program */ 87 extern int errorflag; /* 1 if error has occurred */ 88 extern bool donefld; /* true if record broken into fields */ 89 extern bool donerec; /* true if record is valid (no fld has changed */ 90 extern int dbg; 91 92 extern const char *patbeg; /* beginning of pattern matched */ 93 extern int patlen; /* length of pattern matched. set in b.c */ 94 95 /* Cell: all information about a variable or constant */ 96 97 typedef struct Cell { 98 uschar ctype; /* OCELL, OBOOL, OJUMP, etc. */ 99 uschar csub; /* CCON, CTEMP, CFLD, etc. */ 100 char *nval; /* name, for variables only */ 101 char *sval; /* string value */ 102 Awkfloat fval; /* value as number */ 103 int tval; /* type info: STR|NUM|ARR|FCN|FLD|CON|DONTFREE|CONVC|CONVO */ 104 char *fmt; /* CONVFMT/OFMT value used to convert from number */ 105 struct Cell *cnext; /* ptr to next if chained */ 106 } Cell; 107 108 typedef struct Array { /* symbol table array */ 109 int nelem; /* elements in table right now */ 110 int size; /* size of tab */ 111 Cell **tab; /* hash table pointers */ 112 } Array; 113 114 #define NSYMTAB 50 /* initial size of a symbol table */ 115 extern Array *symtab; 116 117 extern Cell *nrloc; /* NR */ 118 extern Cell *fnrloc; /* FNR */ 119 extern Cell *fsloc; /* FS */ 120 extern Cell *nfloc; /* NF */ 121 extern Cell *ofsloc; /* OFS */ 122 extern Cell *orsloc; /* ORS */ 123 extern Cell *rsloc; /* RS */ 124 extern Cell *rstartloc; /* RSTART */ 125 extern Cell *rlengthloc; /* RLENGTH */ 126 extern Cell *subseploc; /* SUBSEP */ 127 extern Cell *symtabloc; /* SYMTAB */ 128 129 /* Cell.tval values: */ 130 #define NUM 01 /* number value is valid */ 131 #define STR 02 /* string value is valid */ 132 #define DONTFREE 04 /* string space is not freeable */ 133 #define CON 010 /* this is a constant */ 134 #define ARR 020 /* this is an array */ 135 #define FCN 040 /* this is a function name */ 136 #define FLD 0100 /* this is a field $1, $2, ... */ 137 #define REC 0200 /* this is $0 */ 138 #define CONVC 0400 /* string was converted from number via CONVFMT */ 139 #define CONVO 01000 /* string was converted from number via OFMT */ 140 141 142 /* function types */ 143 #define FLENGTH 1 144 #define FSQRT 2 145 #define FEXP 3 146 #define FLOG 4 147 #define FINT 5 148 #define FSYSTEM 6 149 #define FRAND 7 150 #define FSRAND 8 151 #define FSIN 9 152 #define FCOS 10 153 #define FATAN 11 154 #define FTOUPPER 12 155 #define FTOLOWER 13 156 #define FFLUSH 14 157 158 /* Node: parse tree is made of nodes, with Cell's at bottom */ 159 160 typedef struct Node { 161 int ntype; 162 struct Node *nnext; 163 int lineno; 164 int nobj; 165 struct Node *narg[1]; /* variable: actual size set by calling malloc */ 166 } Node; 167 168 #define NIL ((Node *) 0) 169 170 extern Node *winner; 171 extern Node *nullnode; 172 173 /* ctypes */ 174 #define OCELL 1 175 #define OBOOL 2 176 #define OJUMP 3 177 178 /* Cell subtypes: csub */ 179 #define CFREE 7 180 #define CCOPY 6 181 #define CCON 5 182 #define CTEMP 4 183 #define CNAME 3 184 #define CVAR 2 185 #define CFLD 1 186 #define CUNK 0 187 188 /* bool subtypes */ 189 #define BTRUE 11 190 #define BFALSE 12 191 192 /* jump subtypes */ 193 #define JEXIT 21 194 #define JNEXT 22 195 #define JBREAK 23 196 #define JCONT 24 197 #define JRET 25 198 #define JNEXTFILE 26 199 200 /* node types */ 201 #define NVALUE 1 202 #define NSTAT 2 203 #define NEXPR 3 204 205 206 extern int pairstack[], paircnt; 207 208 #define notlegal(n) (n <= FIRSTTOKEN || n >= LASTTOKEN || proctab[n-FIRSTTOKEN] == nullproc) 209 #define isvalue(n) ((n)->ntype == NVALUE) 210 #define isexpr(n) ((n)->ntype == NEXPR) 211 #define isjump(n) ((n)->ctype == OJUMP) 212 #define isexit(n) ((n)->csub == JEXIT) 213 #define isbreak(n) ((n)->csub == JBREAK) 214 #define iscont(n) ((n)->csub == JCONT) 215 #define isnext(n) ((n)->csub == JNEXT || (n)->csub == JNEXTFILE) 216 #define isret(n) ((n)->csub == JRET) 217 #define isrec(n) ((n)->tval & REC) 218 #define isfld(n) ((n)->tval & FLD) 219 #define isstr(n) ((n)->tval & STR) 220 #define isnum(n) ((n)->tval & NUM) 221 #define isarr(n) ((n)->tval & ARR) 222 #define isfcn(n) ((n)->tval & FCN) 223 #define istrue(n) ((n)->csub == BTRUE) 224 #define istemp(n) ((n)->csub == CTEMP) 225 #define isargument(n) ((n)->nobj == ARG) 226 /* #define freeable(p) (!((p)->tval & DONTFREE)) */ 227 #define freeable(p) ( ((p)->tval & (STR|DONTFREE)) == STR ) 228 229 /* structures used by regular expression matching machinery, mostly b.c: */ 230 231 #define NCHARS (1256+3) /* 256 handles 8-bit chars; 128 does 7-bit */ 232 /* BUG: some overflows (caught) if we use 256 */ 233 /* watch out in match(), etc. */ 234 #define HAT (NCHARS+2) /* matches ^ in regular expr */ 235 #define NSTATES 32 236 237 typedef struct rrow { 238 long ltype; /* long avoids pointer warnings on 64-bit */ 239 union { 240 int i; 241 Node *np; 242 uschar *up; 243 int *rp; /* rune representation of char class */ 244 } lval; /* because Al stores a pointer in it! */ 245 int *lfollow; 246 } rrow; 247 248 typedef struct gtte { /* gototab entry */ 249 unsigned int ch; 250 unsigned int state; 251 } gtte; 252 253 typedef struct gtt { /* gototab */ 254 size_t allocated; 255 size_t inuse; 256 gtte *entries; 257 } gtt; 258 259 typedef struct fa { 260 gtt *gototab; 261 uschar *out; 262 uschar *restr; 263 int **posns; 264 int state_count; 265 bool anchor; 266 int use; 267 int initstat; 268 int curstat; 269 int accept; 270 struct rrow re[1]; /* variable: actual size set by calling malloc */ 271 } fa; 272 273 274 #include "proto.h" 275