external/historical/nawk/dist/awk.h

   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     EMPTY[];
  52 extern char     **FS;
  53 extern char     **RS;
  54 extern char     **ORS;
  55 extern char     **OFS;
  56 extern char     **OFMT;
  57 extern Awkfloat *NR;
  58 extern Awkfloat *FNR;
  59 extern Awkfloat *NF;
  60 extern char     **FILENAME;
  61 extern char     **SUBSEP;
  62 extern Awkfloat *RSTART;
  63 extern Awkfloat *RLENGTH;
  64
  65 extern uschar   *record;        /* points to $0 */
  66 extern int      lineno;         /* line number in awk program */
  67 extern int      errorflag;      /* 1 if error has occurred */
  68 extern int      donefld;        /* 1 if record broken into fields */
  69 extern int      donerec;        /* 1 if record is valid (no fld has changed */
  70
  71 extern int      dbg;
  72
  73 extern  uschar  *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 FSYSTIME        15
 130 #define FSTRFTIME       16
 131
 132 /* Node:  parse tree is made of nodes, with Cell's at bottom */
 133
 134 typedef struct Node {
 135         int     ntype;
 136         struct  Node *nnext;
 137         int     lineno;
 138         int     nobj;
 139         struct  Node *narg[1];  /* variable: actual size set by calling malloc */
 140 } Node;
 141
 142 #define NIL     ((Node *) 0)
 143
 144 extern Node     *winner;
 145 extern Node     *nullstat;
 146 extern Node     *nullnode;
 147
 148 /* ctypes */
 149 #define OCELL   1
 150 #define OBOOL   2
 151 #define OJUMP   3
 152
 153 /* Cell subtypes: csub */
 154 #define CFREE   7
 155 #define CCOPY   6
 156 #define CCON    5
 157 #define CTEMP   4
 158 #define CNAME   3
 159 #define CVAR    2
 160 #define CFLD    1
 161 #define CUNK    0
 162
 163 /* bool subtypes */
 164 #define BTRUE   11
 165 #define BFALSE  12
 166
 167 /* jump subtypes */
 168 #define JEXIT   21
 169 #define JNEXT   22
 170 #define JBREAK  23
 171 #define JCONT   24
 172 #define JRET    25
 173 #define JNEXTFILE       26
 174
 175 /* node types */
 176 #define NVALUE  1
 177 #define NSTAT   2
 178 #define NEXPR   3
 179
 180
 181 extern  int     pairstack[], paircnt;
 182
 183 #define notlegal(n)     (n <= FIRSTTOKEN || n >= LASTTOKEN || proctab[n-FIRSTTOKEN] == nullproc)
 184 #define isvalue(n)      ((n)->ntype == NVALUE)
 185 #define isexpr(n)       ((n)->ntype == NEXPR)
 186 #define isjump(n)       ((n)->ctype == OJUMP)
 187 #define isexit(n)       ((n)->csub == JEXIT)
 188 #define isbreak(n)      ((n)->csub == JBREAK)
 189 #define iscont(n)       ((n)->csub == JCONT)
 190 #define isnext(n)       ((n)->csub == JNEXT || (n)->csub == JNEXTFILE)
 191 #define isret(n)        ((n)->csub == JRET)
 192 #define isrec(n)        ((n)->tval & REC)
 193 #define isfld(n)        ((n)->tval & FLD)
 194 #define isstr(n)        ((n)->tval & STR)
 195 #define isnum(n)        ((n)->tval & NUM)
 196 #define isarr(n)        ((n)->tval & ARR)
 197 #define isfcn(n)        ((n)->tval & FCN)
 198 #define istrue(n)       ((n)->csub == BTRUE)
 199 #define istemp(n)       ((n)->csub == CTEMP)
 200 #define isargument(n)   ((n)->nobj == ARG)
 201 /* #define freeable(p)  (!((p)->tval & DONTFREE)) */
 202 #define freeable(p)     ( ((p)->tval & (STR|DONTFREE)) == STR )
 203
 204 /* structures used by regular expression matching machinery, mostly b.c: */
 205
 206 #define NCHARS  (256+3)         /* 256 handles 8-bit chars; 128 does 7-bit */
 207                                 /* watch out in match(), etc. */
 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         unsigned int    **gototab;
 220         uschar  *out;
 221         uschar  *restr;
 222         int     **posns;
 223         int     state_count;
 224         int     anchor;
 225         int     use;
 226         int     initstat;
 227         int     curstat;
 228         int     accept;
 229         struct  rrow re[1];     /* variable: actual size set by calling malloc */
 230 } fa;
 231
 232
 233 #include "proto.h"