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 14 129 130 /* Node: parse tree is made of nodes, with Cell's at bottom */ 131 132 typedef struct Node { 133 int ntype; 134 struct Node *nnext; 135 int lineno; 136 int nobj; 137 struct Node *narg[1]; /* variable: actual size set by calling malloc */ 138 } Node; 139 140 #define NIL ((Node *) 0) 141 142 extern Node *winner; 143 extern Node *nullstat; 144 extern Node *nullnode; 145 146 /* ctypes */ 147 #define OCELL 1 148 #define OBOOL 2 149 #define OJUMP 3 150 151 /* Cell subtypes: csub */ 152 #define CFREE 7 153 #define CCOPY 6 154 #define CCON 5 155 #define CTEMP 4 156 #define CNAME 3 157 #define CVAR 2 158 #define CFLD 1 159 #define CUNK 0 160 161 /* bool subtypes */ 162 #define BTRUE 11 163 #define BFALSE 12 164 165 /* jump subtypes */ 166 #define JEXIT 21 167 #define JNEXT 22 168 #define JBREAK 23 169 #define JCONT 24 170 #define JRET 25 171 #define JNEXTFILE 26 172 173 /* node types */ 174 #define NVALUE 1 175 #define NSTAT 2 176 #define NEXPR 3 177 178 179 extern int pairstack[], paircnt; 180 181 #define notlegal(n) (n <= FIRSTTOKEN || n >= LASTTOKEN || proctab[n-FIRSTTOKEN] == nullproc) 182 #define isvalue(n) ((n)->ntype == NVALUE) 183 #define isexpr(n) ((n)->ntype == NEXPR) 184 #define isjump(n) ((n)->ctype == OJUMP) 185 #define isexit(n) ((n)->csub == JEXIT) 186 #define isbreak(n) ((n)->csub == JBREAK) 187 #define iscont(n) ((n)->csub == JCONT) 188 #define isnext(n) ((n)->csub == JNEXT || (n)->csub == JNEXTFILE) 189 #define isret(n) ((n)->csub == JRET) 190 #define isrec(n) ((n)->tval & REC) 191 #define isfld(n) ((n)->tval & FLD) 192 #define isstr(n) ((n)->tval & STR) 193 #define isnum(n) ((n)->tval & NUM) 194 #define isarr(n) ((n)->tval & ARR) 195 #define isfcn(n) ((n)->tval & FCN) 196 #define istrue(n) ((n)->csub == BTRUE) 197 #define istemp(n) ((n)->csub == CTEMP) 198 #define isargument(n) ((n)->nobj == ARG) 199 /* #define freeable(p) (!((p)->tval & DONTFREE)) */ 200 #define freeable(p) ( ((p)->tval & (STR|DONTFREE)) == STR ) 201 202 /* structures used by regular expression matching machinery, mostly b.c: */ 203 204 #define NCHARS (256+3) /* 256 handles 8-bit chars; 128 does 7-bit */ 205 /* watch out in match(), etc. */ 206 #define NSTATES 32 207 208 typedef struct rrow { 209 long ltype; /* long avoids pointer warnings on 64-bit */ 210 union { 211 int i; 212 Node *np; 213 uschar *up; 214 } lval; /* because Al stores a pointer in it! */ 215 int *lfollow; 216 } rrow; 217 218 typedef struct fa { 219 uschar gototab[NSTATES][NCHARS]; 220 uschar out[NSTATES]; 221 uschar *restr; 222 int *posns[NSTATES]; 223 int anchor; 224 int use; 225 int initstat; 226 int curstat; 227 int accept; 228 int reset; 229 struct rrow re[1]; /* variable: actual size set by calling malloc */ 230 } fa; 231 232 233 #include "proto.h" 234
