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 */ 85 struct Cell *cnext; /* ptr to next if chained */ 86 } Cell; 87 88 typedef struct Array { /* symbol table array */ 89 int nelem; /* elements in table right now */ 90 int size; /* size of tab */ 91 Cell **tab; /* hash table pointers */ 92 } Array; 93 94 #define NSYMTAB 50 /* initial size of a symbol table */ 95 extern Array *symtab; 96 97 extern Cell *nrloc; /* NR */ 98 extern Cell *fnrloc; /* FNR */ 99 extern Cell *nfloc; /* NF */ 100 extern Cell *rstartloc; /* RSTART */ 101 extern Cell *rlengthloc; /* RLENGTH */ 102 103 /* Cell.tval values: */ 104 #define NUM 01 /* number value is valid */ 105 #define STR 02 /* string value is valid */ 106 #define DONTFREE 04 /* string space is not freeable */ 107 #define CON 010 /* this is a constant */ 108 #define ARR 020 /* this is an array */ 109 #define FCN 040 /* this is a function name */ 110 #define FLD 0100 /* this is a field $1, $2, ... */ 111 #define REC 0200 /* this is $0 */ 112 113 114 /* function types */ 115 #define FLENGTH 1 116 #define FSQRT 2 117 #define FEXP 3 118 #define FLOG 4 119 #define FINT 5 120 #define FSYSTEM 6 121 #define FRAND 7 122 #define FSRAND 8 123 #define FSIN 9 124 #define FCOS 10 125 #define FATAN 11 126 #define FTOUPPER 12 127 #define FTOLOWER 13 128 #define FFLUSH 14 129 #define FAND 15 130 #define FFOR 16 131 #define FXOR 17 132 #define FCOMPL 18 133 #define FLSHIFT 19 134 #define FRSHIFT 20 135 136 /* Node: parse tree is made of nodes, with Cell's at bottom */ 137 138 typedef struct Node { 139 int ntype; 140 struct Node *nnext; 141 int lineno; 142 int nobj; 143 struct Node *narg[1]; /* variable: actual size set by calling malloc */ 144 } Node; 145 146 #define NIL ((Node *) 0) 147 148 extern Node *winner; 149 extern Node *nullstat; 150 extern Node *nullnode; 151 152 /* ctypes */ 153 #define OCELL 1 154 #define OBOOL 2 155 #define OJUMP 3 156 157 /* Cell subtypes: csub */ 158 #define CFREE 7 159 #define CCOPY 6 160 #define CCON 5 161 #define CTEMP 4 162 #define CNAME 3 163 #define CVAR 2 164 #define CFLD 1 165 #define CUNK 0 166 167 /* bool subtypes */ 168 #define BTRUE 11 169 #define BFALSE 12 170 171 /* jump subtypes */ 172 #define JEXIT 21 173 #define JNEXT 22 174 #define JBREAK 23 175 #define JCONT 24 176 #define JRET 25 177 #define JNEXTFILE 26 178 179 /* node types */ 180 #define NVALUE 1 181 #define NSTAT 2 182 #define NEXPR 3 183 184 185 extern int pairstack[], paircnt; 186 187 #define notlegal(n) (n <= FIRSTTOKEN || n >= LASTTOKEN || proctab[n-FIRSTTOKEN] == nullproc) 188 #define isvalue(n) ((n)->ntype == NVALUE) 189 #define isexpr(n) ((n)->ntype == NEXPR) 190 #define isjump(n) ((n)->ctype == OJUMP) 191 #define isexit(n) ((n)->csub == JEXIT) 192 #define isbreak(n) ((n)->csub == JBREAK) 193 #define iscont(n) ((n)->csub == JCONT) 194 #define isnext(n) ((n)->csub == JNEXT || (n)->csub == JNEXTFILE) 195 #define isret(n) ((n)->csub == JRET) 196 #define isrec(n) ((n)->tval & REC) 197 #define isfld(n) ((n)->tval & FLD) 198 #define isstr(n) ((n)->tval & STR) 199 #define isnum(n) ((n)->tval & NUM) 200 #define isarr(n) ((n)->tval & ARR) 201 #define isfcn(n) ((n)->tval & FCN) 202 #define istrue(n) ((n)->csub == BTRUE) 203 #define istemp(n) ((n)->csub == CTEMP) 204 #define isargument(n) ((n)->nobj == ARG) 205 /* #define freeable(p) (!((p)->tval & DONTFREE)) */ 206 #define freeable(p) ( ((p)->tval & (STR|DONTFREE)) == STR ) 207 208 /* structures used by regular expression matching machinery, mostly b.c: */ 209 210 #define NCHARS (256+3) /* 256 handles 8-bit chars; 128 does 7-bit */ 211 /* watch out in match(), etc. */ 212 #define NSTATES 32 213 214 typedef struct rrow { 215 long ltype; /* long avoids pointer warnings on 64-bit */ 216 union { 217 int i; 218 Node *np; 219 uschar *up; 220 } lval; /* because Al stores a pointer in it! */ 221 int *lfollow; 222 } rrow; 223 224 typedef struct fa { 225 uschar gototab[NSTATES][NCHARS]; 226 uschar out[NSTATES]; 227 uschar *restr; 228 int *posns[NSTATES]; 229 int anchor; 230 int use; 231 int initstat; 232 int curstat; 233 int accept; 234 int reset; 235 struct rrow re[1]; /* variable: actual size set by calling malloc */ 236 } fa; 237 238 239 #include "proto.h" 240