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 27 typedef double Awkfloat; 28 29 /* unsigned char is more trouble than it's worth */ 30 31 typedef unsigned char uschar; 32 33 #define xfree(a) { if ((a) != NULL) { free((void *) (a)); (a) = NULL; } } 34 35 #define NN(p) ((p) ? (p) : "(null)") /* guaranteed non-null for dprintf 36 */ 37 #define DEBUG 38 #ifdef DEBUG 39 /* uses have to be doubly parenthesized */ 40 # define dprintf(x) if (dbg) printf x 41 #else 42 # define dprintf(x) 43 #endif 44 45 extern int compile_time; /* 1 if compiling, 0 if running */ 46 extern int safe; /* 0 => unsafe, 1 => safe */ 47 48 #define RECSIZE (8 * 1024) /* sets limit on records, fields, etc., etc. */ 49 extern int recsize; /* size of current record, orig RECSIZE */ 50 51 extern char **FS; 52 extern char **RS; 53 extern char **ORS; 54 extern char **OFS; 55 extern char **OFMT; 56 extern Awkfloat *NR; 57 extern Awkfloat *FNR; 58 extern Awkfloat *NF; 59 extern char **FILENAME; 60 extern char **SUBSEP; 61 extern Awkfloat *RSTART; 62 extern Awkfloat *RLENGTH; 63 64 extern char *record; /* points to $0 */ 65 extern int lineno; /* line number in awk program */ 66 extern int errorflag; /* 1 if error has occurred */ 67 extern int donefld; /* 1 if record broken into fields */ 68 extern int donerec; /* 1 if record is valid (no fld has changed */ 69 extern char inputFS[]; /* FS at time of input, for field splitting */ 70 71 extern int dbg; 72 73 extern char *patbeg; /* beginning of pattern matched */ 74 extern int patlen; /* length of pattern matched. set in b.c */ 75 76 /* Cell: all information about a variable or constant */ 77 78 typedef struct Cell { 79 uschar ctype; /* OCELL, OBOOL, OJUMP, etc. */ 80 uschar csub; /* CCON, CTEMP, CFLD, etc. */ 81 char *nval; /* name, for variables only */ 82 char *sval; /* string value */ 83 Awkfloat fval; /* value as number */ 84 int tval; /* type info: STR|NUM|ARR|FCN|FLD|CON|DONTFREE|CONVC|CONVO */ 85 char *fmt; /* CONVFMT/OFMT value used to convert from number */ 86 struct Cell *cnext; /* ptr to next if chained */ 87 } Cell; 88 89 typedef struct Array { /* symbol table array */ 90 int nelem; /* elements in table right now */ 91 int size; /* size of tab */ 92 Cell **tab; /* hash table pointers */ 93 } Array; 94 95 #define NSYMTAB 50 /* initial size of a symbol table */ 96 extern Array *symtab; 97 98 extern Cell *nrloc; /* NR */ 99 extern Cell *fnrloc; /* FNR */ 100 extern Cell *fsloc; /* FS */ 101 extern Cell *nfloc; /* NF */ 102 extern Cell *ofsloc; /* OFS */ 103 extern Cell *orsloc; /* ORS */ 104 extern Cell *rsloc; /* RS */ 105 extern Cell *rstartloc; /* RSTART */ 106 extern Cell *rlengthloc; /* RLENGTH */ 107 extern Cell *subseploc; /* SUBSEP */ 108 109 /* Cell.tval values: */ 110 #define NUM 01 /* number value is valid */ 111 #define STR 02 /* string value is valid */ 112 #define DONTFREE 04 /* string space is not freeable */ 113 #define CON 010 /* this is a constant */ 114 #define ARR 020 /* this is an array */ 115 #define FCN 040 /* this is a function name */ 116 #define FLD 0100 /* this is a field $1, $2, ... */ 117 #define REC 0200 /* this is $0 */ 118 #define CONVC 0400 /* string was converted from number via CONVFMT */ 119 #define CONVO 01000 /* string was converted from number via OFMT */ 120 121 122 /* function types */ 123 #define FLENGTH 1 124 #define FSQRT 2 125 #define FEXP 3 126 #define FLOG 4 127 #define FINT 5 128 #define FSYSTEM 6 129 #define FRAND 7 130 #define FSRAND 8 131 #define FSIN 9 132 #define FCOS 10 133 #define FATAN 11 134 #define FTOUPPER 12 135 #define FTOLOWER 13 136 #define FFLUSH 14 137 138 /* Node: parse tree is made of nodes, with Cell's at bottom */ 139 140 typedef struct Node { 141 int ntype; 142 struct Node *nnext; 143 int lineno; 144 int nobj; 145 struct Node *narg[1]; /* variable: actual size set by calling malloc */ 146 } Node; 147 148 #define NIL ((Node *) 0) 149 150 extern Node *winner; 151 extern Node *nullstat; 152 extern Node *nullnode; 153 154 /* ctypes */ 155 #define OCELL 1 156 #define OBOOL 2 157 #define OJUMP 3 158 159 /* Cell subtypes: csub */ 160 #define CFREE 7 161 #define CCOPY 6 162 #define CCON 5 163 #define CTEMP 4 164 #define CNAME 3 165 #define CVAR 2 166 #define CFLD 1 167 #define CUNK 0 168 169 /* bool subtypes */ 170 #define BTRUE 11 171 #define BFALSE 12 172 173 /* jump subtypes */ 174 #define JEXIT 21 175 #define JNEXT 22 176 #define JBREAK 23 177 #define JCONT 24 178 #define JRET 25 179 #define JNEXTFILE 26 180 181 /* node types */ 182 #define NVALUE 1 183 #define NSTAT 2 184 #define NEXPR 3 185 186 187 extern int pairstack[], paircnt; 188 189 #define notlegal(n) (n <= FIRSTTOKEN || n >= LASTTOKEN || proctab[n-FIRSTTOKEN] == nullproc) 190 #define isvalue(n) ((n)->ntype == NVALUE) 191 #define isexpr(n) ((n)->ntype == NEXPR) 192 #define isjump(n) ((n)->ctype == OJUMP) 193 #define isexit(n) ((n)->csub == JEXIT) 194 #define isbreak(n) ((n)->csub == JBREAK) 195 #define iscont(n) ((n)->csub == JCONT) 196 #define isnext(n) ((n)->csub == JNEXT || (n)->csub == JNEXTFILE) 197 #define isret(n) ((n)->csub == JRET) 198 #define isrec(n) ((n)->tval & REC) 199 #define isfld(n) ((n)->tval & FLD) 200 #define isstr(n) ((n)->tval & STR) 201 #define isnum(n) ((n)->tval & NUM) 202 #define isarr(n) ((n)->tval & ARR) 203 #define isfcn(n) ((n)->tval & FCN) 204 #define istrue(n) ((n)->csub == BTRUE) 205 #define istemp(n) ((n)->csub == CTEMP) 206 #define isargument(n) ((n)->nobj == ARG) 207 /* #define freeable(p) (!((p)->tval & DONTFREE)) */ 208 #define freeable(p) ( ((p)->tval & (STR|DONTFREE)) == STR ) 209 210 /* structures used by regular expression matching machinery, mostly b.c: */ 211 212 #define NCHARS (256+3) /* 256 handles 8-bit chars; 128 does 7-bit */ 213 /* watch out in match(), etc. */ 214 #define NSTATES 32 215 216 typedef struct rrow { 217 long ltype; /* long avoids pointer warnings on 64-bit */ 218 union { 219 int i; 220 Node *np; 221 uschar *up; 222 } lval; /* because Al stores a pointer in it! */ 223 int *lfollow; 224 } rrow; 225 226 typedef struct fa { 227 uschar gototab[NSTATES][NCHARS]; 228 uschar out[NSTATES]; 229 uschar *restr; 230 int *posns[NSTATES]; 231 int anchor; 232 int use; 233 int initstat; 234 int curstat; 235 int accept; 236 int reset; 237 struct rrow re[1]; /* variable: actual size set by calling malloc */ 238 } fa; 239 240 241 #include "proto.h" 242