dist/nawk/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     **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 uschar   *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
  70 extern int      dbg;
  71
  72 extern  uschar  *patbeg;        /* beginning of pattern matched */
  73 extern  int     patlen;         /* length of pattern matched.  set in b.c */
  74
  75 /* Cell:  all information about a variable or constant */
  76
  77 typedef struct Cell {
  78         uschar  ctype;          /* OCELL, OBOOL, OJUMP, etc. */
  79         uschar  csub;           /* CCON, CTEMP, CFLD, etc. */
  80         char    *nval;          /* name, for variables only */
  81         char    *sval;          /* string value */
  82         Awkfloat fval;          /* value as number */
  83         int      tval;          /* type info: STR|NUM|ARR|FCN|FLD|CON|DONTFREE */
  84         struct Cell *cnext;     /* ptr to next if chained */
  85 } Cell;
  86
  87 typedef struct Array {          /* symbol table array */
  88         int     nelem;          /* elements in table right now */
  89         int     size;           /* size of tab */
  90         Cell    **tab;          /* hash table pointers */
  91 } Array;
  92
  93 #define NSYMTAB 50      /* initial size of a symbol table */
  94 extern Array    *symtab;
  95
  96 extern Cell     *nrloc;         /* NR */
  97 extern Cell     *fnrloc;        /* FNR */
  98 extern Cell     *nfloc;         /* NF */
  99 extern Cell     *rstartloc;     /* RSTART */
 100 extern Cell     *rlengthloc;    /* RLENGTH */
 101
 102 /* Cell.tval values: */
 103 #define NUM     01      /* number value is valid */
 104 #define STR     02      /* string value is valid */
 105 #define DONTFREE 04     /* string space is not freeable */
 106 #define CON     010     /* this is a constant */
 107 #define ARR     020     /* this is an array */
 108 #define FCN     040     /* this is a function name */
 109 #define FLD     0100    /* this is a field $1, $2, ... */
 110 #define REC     0200    /* this is $0 */
 111
 112
 113 /* function types */
 114 #define FLENGTH 1
 115 #define FSQRT   2
 116 #define FEXP    3
 117 #define FLOG    4
 118 #define FINT    5
 119 #define FSYSTEM 6
 120 #define FRAND   7
 121 #define FSRAND  8
 122 #define FSIN    9
 123 #define FCOS    10
 124 #define FATAN   11
 125 #define FTOUPPER 12
 126 #define FTOLOWER 13
 127 #define FFLUSH  14
 128 #define FSYSTIME        15
 129 #define FSTRFTIME       16
 130
 131 /* Node:  parse tree is made of nodes, with Cell's at bottom */
 132
 133 typedef struct Node {
 134         int     ntype;
 135         struct  Node *nnext;
 136         int     lineno;
 137         int     nobj;
 138         struct  Node *narg[1];  /* variable: actual size set by calling malloc */
 139 } Node;
 140
 141 #define NIL     ((Node *) 0)
 142
 143 extern Node     *winner;
 144 extern Node     *nullstat;
 145 extern Node     *nullnode;
 146
 147 /* ctypes */
 148 #define OCELL   1
 149 #define OBOOL   2
 150 #define OJUMP   3
 151
 152 /* Cell subtypes: csub */
 153 #define CFREE   7
 154 #define CCOPY   6
 155 #define CCON    5
 156 #define CTEMP   4
 157 #define CNAME   3
 158 #define CVAR    2
 159 #define CFLD    1
 160 #define CUNK    0
 161
 162 /* bool subtypes */
 163 #define BTRUE   11
 164 #define BFALSE  12
 165
 166 /* jump subtypes */
 167 #define JEXIT   21
 168 #define JNEXT   22
 169 #define JBREAK  23
 170 #define JCONT   24
 171 #define JRET    25
 172 #define JNEXTFILE       26
 173
 174 /* node types */
 175 #define NVALUE  1
 176 #define NSTAT   2
 177 #define NEXPR   3
 178
 179
 180 extern  int     pairstack[], paircnt;
 181
 182 #define notlegal(n)     (n <= FIRSTTOKEN || n >= LASTTOKEN || proctab[n-FIRSTTOKEN] == nullproc)
 183 #define isvalue(n)      ((n)->ntype == NVALUE)
 184 #define isexpr(n)       ((n)->ntype == NEXPR)
 185 #define isjump(n)       ((n)->ctype == OJUMP)
 186 #define isexit(n)       ((n)->csub == JEXIT)
 187 #define isbreak(n)      ((n)->csub == JBREAK)
 188 #define iscont(n)       ((n)->csub == JCONT)
 189 #define isnext(n)       ((n)->csub == JNEXT || (n)->csub == JNEXTFILE)
 190 #define isret(n)        ((n)->csub == JRET)
 191 #define isrec(n)        ((n)->tval & REC)
 192 #define isfld(n)        ((n)->tval & FLD)
 193 #define isstr(n)        ((n)->tval & STR)
 194 #define isnum(n)        ((n)->tval & NUM)
 195 #define isarr(n)        ((n)->tval & ARR)
 196 #define isfcn(n)        ((n)->tval & FCN)
 197 #define istrue(n)       ((n)->csub == BTRUE)
 198 #define istemp(n)       ((n)->csub == CTEMP)
 199 #define isargument(n)   ((n)->nobj == ARG)
 200 /* #define freeable(p)  (!((p)->tval & DONTFREE)) */
 201 #define freeable(p)     ( ((p)->tval & (STR|DONTFREE)) == STR )
 202
 203 /* structures used by regular expression matching machinery, mostly b.c: */
 204
 205 #define NCHARS  (256+3)         /* 256 handles 8-bit chars; 128 does 7-bit */
 206                                 /* watch out in match(), etc. */
 207 typedef struct rrow {
 208         long    ltype;  /* long avoids pointer warnings on 64-bit */
 209         union {
 210                 int i;
 211                 Node *np;
 212                 uschar *up;
 213         } lval;         /* because Al stores a pointer in it! */
 214         int     *lfollow;
 215 } rrow;
 216
 217 typedef struct fa {
 218         unsigned int    **gototab;
 219         uschar  *out;
 220         uschar  *restr;
 221         int     **posns;
 222         int     state_count;
 223         int     anchor;
 224         int     use;
 225         int     initstat;
 226         int     curstat;
 227         int     accept;
 228         struct  rrow re[1];     /* variable: actual size set by calling malloc */
 229 } fa;
 230
 231
 232 #include "proto.h"