usr.bin/m4/mdef.h

   1 /*      $OpenBSD: mdef.h,v 1.29 2006/03/20 20:27:45 espie Exp $ */
   2 /*      $NetBSD: mdef.h,v 1.7 1996/01/13 23:25:27 pk Exp $      */
   3
   4 /*
   5  * Copyright (c) 1989, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Ozan Yigit at York University.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  *      @(#)mdef.h      8.1 (Berkeley) 6/6/93
  36  */
  37
  38 #ifdef __GNUC__
  39 # define UNUSED __attribute__((__unused__))
  40 #else
  41 # define UNUSED
  42 #endif
  43
  44 #define MACRTYPE        1
  45 #define DEFITYPE        2
  46 #define EXPRTYPE        3
  47 #define SUBSTYPE        4
  48 #define IFELTYPE        5
  49 #define LENGTYPE        6
  50 #define CHNQTYPE        7
  51 #define SYSCTYPE        8
  52 #define UNDFTYPE        9
  53 #define INCLTYPE        10
  54 #define SINCTYPE        11
  55 #define PASTTYPE        12
  56 #define SPASTYPE        13
  57 #define INCRTYPE        14
  58 #define IFDFTYPE        15
  59 #define PUSDTYPE        16
  60 #define POPDTYPE        17
  61 #define SHIFTYPE        18
  62 #define DECRTYPE        19
  63 #define DIVRTYPE        20
  64 #define UNDVTYPE        21
  65 #define DIVNTYPE        22
  66 #define MKTMTYPE        23
  67 #define ERRPTYPE        24
  68 #define M4WRTYPE        25
  69 #define TRNLTYPE        26
  70 #define DNLNTYPE        27
  71 #define DUMPTYPE        28
  72 #define CHNCTYPE        29
  73 #define INDXTYPE        30
  74 #define SYSVTYPE        31
  75 #define EXITTYPE        32
  76 #define DEFNTYPE        33
  77 #define SELFTYPE        34
  78 #define INDIRTYPE       35
  79 #define BUILTINTYPE     36
  80 #define PATSTYPE        37
  81 #define FILENAMETYPE    38
  82 #define LINETYPE        39
  83 #define REGEXPTYPE      40
  84 #define ESYSCMDTYPE     41
  85 #define TRACEONTYPE     42
  86 #define TRACEOFFTYPE    43
  87 #define FORMATTYPE      44
  88
  89 #define BUILTIN_MARKER  "__builtin_"
  90
  91 #define TYPEMASK        63      /* Keep bits really corresponding to a type. */
  92 #define RECDEF          256     /* Pure recursive def, don't expand it */
  93 #define NOARGS          512     /* builtin needs no args */
  94 #define NEEDARGS        1024    /* mark builtin that need args with this */
  95
  96 /*
  97  * m4 special characters
  98  */
  99
 100 #define ARGFLAG         '$'
 101 #define LPAREN          '('
 102 #define RPAREN          ')'
 103 #define LQUOTE          '`'
 104 #define RQUOTE          '\''
 105 #define COMMA           ','
 106 #define SCOMMT          '#'
 107 #define ECOMMT          '\n'
 108
 109 #ifdef msdos
 110 #define system(str)     (-1)
 111 #endif
 112
 113 /*
 114  * other important constants
 115  */
 116
 117 #define EOS             '\0'
 118 #define MAXINP          10              /* maximum include files            */
 119 #define MAXOUT          10              /* maximum # of diversions          */
 120 #define BUFSIZE         4096            /* starting size of pushback buffer */
 121 #define INITSTACKMAX    4096            /* starting size of call stack      */
 122 #define STRSPMAX        4096            /* starting size of string space    */
 123 #define MAXTOK          512             /* maximum chars in a tokn          */
 124 #define HASHSIZE        199             /* maximum size of hashtab          */
 125 #define MAXCCHARS       5               /* max size of comment/quote delim  */
 126
 127 #define ALL             1
 128 #define TOP             0
 129
 130 #define TRUE            1
 131 #define FALSE           0
 132 #define cycle           for(;;)
 133
 134 /*
 135  * m4 data structures
 136  */
 137
 138 typedef struct ndblock *ndptr;
 139
 140 struct macro_definition {
 141         struct macro_definition *next;
 142         char            *defn;  /* definition..               */
 143         unsigned int    type;   /* type of the entry..        */
 144 };
 145
 146
 147 struct ndblock {                        /* hashtable structure         */
 148         unsigned int            builtin_type;
 149         unsigned int            trace_flags;
 150         struct macro_definition *d;
 151         char            name[1];        /* entry name..               */
 152 };
 153
 154 typedef union {                 /* stack structure */
 155         int     sfra;           /* frame entry  */
 156         char    *sstr;          /* string entry */
 157 } stae;
 158
 159 struct input_file {
 160         FILE            *file;
 161         char            *name;
 162         unsigned long   lineno;
 163         unsigned long   synch_lineno;   /* used for -s */
 164         int             c;
 165 };
 166
 167 #define CURRENT_NAME    (infile[ilevel].name)
 168 #define CURRENT_LINE    (infile[ilevel].lineno)
 169 /*
 170  * macros for readibility and/or speed
 171  *
 172  *      gpbc()  - get a possibly pushed-back character
 173  *      pushf() - push a call frame entry onto stack
 174  *      pushs() - push a string pointer onto stack
 175  */
 176 #define gpbc()   (bp > bufbase) ? *--bp : obtain_char(infile+ilevel)
 177 #define pushf(x)                        \
 178         do {                            \
 179                 if ((size_t)++sp == STACKMAX)   \
 180                         enlarge_stack();\
 181                 mstack[sp].sfra = (x);  \
 182                 sstack[sp] = 0; \
 183         } while (0)
 184
 185 #define pushs(x)                        \
 186         do {                            \
 187                 if ((size_t)++sp == STACKMAX)   \
 188                         enlarge_stack();\
 189                 mstack[sp].sstr = (x);  \
 190                 sstack[sp] = 1; \
 191         } while (0)
 192
 193 #define pushs1(x)                       \
 194         do {                            \
 195                 if ((size_t)++sp == STACKMAX)   \
 196                         enlarge_stack();\
 197                 mstack[sp].sstr = (x);  \
 198                 sstack[sp] = 0; \
 199         } while (0)
 200
 201 /*
 202  *          .                              .
 203  *      |   .   |  <-- sp               |  .  |
 204  *      +-------+                       +-----+
 205  *      | arg 3 ----------------------->| str |
 206  *      +-------+                       |  .  |
 207  *      | arg 2 ---PREVEP-----+            .
 208  *      +-------+             |
 209  *          .                 |         |     |
 210  *      +-------+             |         +-----+
 211  *      | plev  |  PARLEV     +-------->| str |
 212  *      +-------+                       |  .  |
 213  *      | type  |  CALTYP                  .
 214  *      +-------+
 215  *      | prcf  ---PREVFP--+
 216  *      +-------+          |
 217  *      |   .   |  PREVSP  |
 218  *          .              |
 219  *      +-------+          |
 220  *      |       <----------+
 221  *      +-------+
 222  *
 223  */
 224 #define PARLEV  (mstack[fp].sfra)
 225 #define CALTYP  (mstack[fp-2].sfra)
 226 #define TRACESTATUS (mstack[fp-1].sfra)
 227 #define PREVEP  (mstack[fp+3].sstr)
 228 #define PREVSP  (fp-4)
 229 #define PREVFP  (mstack[fp-3].sfra)