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) { if ((a) != NULL) { 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 char EMPTY[]; /* this avoid -Wwritable-strings issues */ 68 extern char **FS; 69 extern char **RS; 70 extern char **ORS; 71 extern char **OFS; 72 extern char **OFMT; 73 extern Awkfloat *NR; 74 extern Awkfloat *FNR; 75 extern Awkfloat *NF; 76 extern char **FILENAME; 77 extern char **SUBSEP; 78 extern Awkfloat *RSTART; 79 extern Awkfloat *RLENGTH; 80 81 extern char *record; /* points to $0 */ 82 extern int lineno; /* line number in awk program */ 83 extern int errorflag; /* 1 if error has occurred */ 84 extern bool donefld; /* true if record broken into fields */ 85 extern bool donerec; /* true if record is valid (no fld has changed */ 86 extern int dbg; 87 88 extern const char *patbeg; /* beginning of pattern matched */ 89 extern int patlen; /* length of pattern matched. set in b.c */ 90 91 /* Cell: all information about a variable or constant */ 92 93 typedef struct Cell { 94 uschar ctype; /* OCELL, OBOOL, OJUMP, etc. */ 95 uschar csub; /* CCON, CTEMP, CFLD, etc. */ 96 char *nval; /* name, for variables only */ 97 char *sval; /* string value */ 98 Awkfloat fval; /* value as number */ 99 int tval; /* type info: STR|NUM|ARR|FCN|FLD|CON|DONTFREE|CONVC|CONVO */ 100 char *fmt; /* CONVFMT/OFMT value used to convert from number */ 101 struct Cell *cnext; /* ptr to next if chained */ 102 } Cell; 103 104 typedef struct Array { /* symbol table array */ 105 int nelem; /* elements in table right now */ 106 int size; /* size of tab */ 107 Cell **tab; /* hash table pointers */ 108 } Array; 109 110 #define NSYMTAB 50 /* initial size of a symbol table */ 111 extern Array *symtab; 112 113 extern Cell *nrloc; /* NR */ 114 extern Cell *fnrloc; /* FNR */ 115 extern Cell *fsloc; /* FS */ 116 extern Cell *nfloc; /* NF */ 117 extern Cell *ofsloc; /* OFS */ 118 extern Cell *orsloc; /* ORS */ 119 extern Cell *rsloc; /* RS */ 120 extern Cell *rstartloc; /* RSTART */ 121 extern Cell *rlengthloc; /* RLENGTH */ 122 extern Cell *subseploc; /* SUBSEP */ 123 extern Cell *symtabloc; /* SYMTAB */ 124 125 /* Cell.tval values: */ 126 #define NUM 01 /* number value is valid */ 127 #define STR 02 /* string value is valid */ 128 #define DONTFREE 04 /* string space is not freeable */ 129 #define CON 010 /* this is a constant */ 130 #define ARR 020 /* this is an array */ 131 #define FCN 040 /* this is a function name */ 132 #define FLD 0100 /* this is a field $1, $2, ... */ 133 #define REC 0200 /* this is $0 */ 134 #define CONVC 0400 /* string was converted from number via CONVFMT */ 135 #define CONVO 01000 /* string was converted from number via OFMT */ 136 137 138 /* function types */ 139 #define FLENGTH 1 140 #define FSQRT 2 141 #define FEXP 3 142 #define FLOG 4 143 #define FINT 5 144 #define FSYSTEM 6 145 #define FRAND 7 146 #define FSRAND 8 147 #define FSIN 9 148 #define FCOS 10 149 #define FATAN 11 150 #define FTOUPPER 12 151 #define FTOLOWER 13 152 #define FFLUSH 14 153 #define FAND 15 154 #define FFOR 16 155 #define FXOR 17 156 #define FCOMPL 18 157 #define FLSHIFT 19 158 #define FRSHIFT 20 159 #define FSYSTIME 21 160 #define FSTRFTIME 22 161 162 /* Node: parse tree is made of nodes, with Cell's at bottom */ 163 164 typedef struct Node { 165 int ntype; 166 struct Node *nnext; 167 int lineno; 168 int nobj; 169 struct Node *narg[1]; /* variable: actual size set by calling malloc */ 170 } Node; 171 172 #define NIL ((Node *) 0) 173 174 extern Node *winner; 175 extern Node *nullstat; 176 extern Node *nullnode; 177 178 /* ctypes */ 179 #define OCELL 1 180 #define OBOOL 2 181 #define OJUMP 3 182 183 /* Cell subtypes: csub */ 184 #define CFREE 7 185 #define CCOPY 6 186 #define CCON 5 187 #define CTEMP 4 188 #define CNAME 3 189 #define CVAR 2 190 #define CFLD 1 191 #define CUNK 0 192 193 /* bool subtypes */ 194 #define BTRUE 11 195 #define BFALSE 12 196 197 /* jump subtypes */ 198 #define JEXIT 21 199 #define JNEXT 22 200 #define JBREAK 23 201 #define JCONT 24 202 #define JRET 25 203 #define JNEXTFILE 26 204 205 /* node types */ 206 #define NVALUE 1 207 #define NSTAT 2 208 #define NEXPR 3 209 210 211 extern int pairstack[], paircnt; 212 213 #define notlegal(n) (n <= FIRSTTOKEN || n >= LASTTOKEN || proctab[n-FIRSTTOKEN] == nullproc) 214 #define isvalue(n) ((n)->ntype == NVALUE) 215 #define isexpr(n) ((n)->ntype == NEXPR) 216 #define isjump(n) ((n)->ctype == OJUMP) 217 #define isexit(n) ((n)->csub == JEXIT) 218 #define isbreak(n) ((n)->csub == JBREAK) 219 #define iscont(n) ((n)->csub == JCONT) 220 #define isnext(n) ((n)->csub == JNEXT || (n)->csub == JNEXTFILE) 221 #define isret(n) ((n)->csub == JRET) 222 #define isrec(n) ((n)->tval & REC) 223 #define isfld(n) ((n)->tval & FLD) 224 #define isstr(n) ((n)->tval & STR) 225 #define isnum(n) ((n)->tval & NUM) 226 #define isarr(n) ((n)->tval & ARR) 227 #define isfcn(n) ((n)->tval & FCN) 228 #define istrue(n) ((n)->csub == BTRUE) 229 #define istemp(n) ((n)->csub == CTEMP) 230 #define isargument(n) ((n)->nobj == ARG) 231 /* #define freeable(p) (!((p)->tval & DONTFREE)) */ 232 #define freeable(p) ( ((p)->tval & (STR|DONTFREE)) == STR ) 233 234 /* structures used by regular expression matching machinery, mostly b.c: */ 235 236 #define NCHARS (256+3) /* 256 handles 8-bit chars; 128 does 7-bit */ 237 /* watch out in match(), etc. */ 238 #define HAT (NCHARS+2) /* matches ^ in regular expr */ 239 #define NSTATES 32 240 241 typedef struct rrow { 242 long ltype; /* long avoids pointer warnings on 64-bit */ 243 union { 244 int i; 245 Node *np; 246 uschar *up; 247 } lval; /* because Al stores a pointer in it! */ 248 int *lfollow; 249 } rrow; 250 251 typedef struct fa { 252 unsigned int **gototab; 253 uschar *out; 254 uschar *restr; 255 int **posns; 256 int state_count; 257 bool anchor; 258 int use; 259 int initstat; 260 int curstat; 261 int accept; 262 struct rrow re[1]; /* variable: actual size set by calling malloc */ 263 } fa; 264 265 266 #include "proto.h" 267