usr.bin/m4/mdef.h

   1 /*      $OpenBSD: mdef.h,v 1.21 2001/09/27 11:40:33 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. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  *
  39  *      @(#)mdef.h      8.1 (Berkeley) 6/6/93
  40  * $FreeBSD: src/usr.bin/m4/mdef.h,v 1.10 2002/07/15 02:15:12 jmallett Exp $
  41  * $DragonFly: src/usr.bin/m4/mdef.h,v 1.3 2006/12/27 21:29:02 pavalos Exp $
  42  */
  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
  88
  89 #define TYPEMASK        63      /* Keep bits really corresponding to a type. */
  90 #define RECDEF          256     /* Pure recursive def, don't expand it */
  91 #define NOARGS          512     /* builtin needs no args */
  92 #define NEEDARGS        1024    /* mark builtin that need args with this */
  93
  94 /*
  95  * m4 special characters
  96  */
  97
  98 #define ARGFLAG         '$'
  99 #define LPAREN          '('
 100 #define RPAREN          ')'
 101 #define LQUOTE          '`'
 102 #define RQUOTE          '\''
 103 #define COMMA           ','
 104 #define SCOMMT          '#'
 105 #define ECOMMT          '\n'
 106
 107 #ifdef msdos
 108 #define system(str)     (-1)
 109 #endif
 110
 111 /*
 112  * other important constants
 113  */
 114
 115 #define EOS             '\0'
 116 #define MAXINP          10              /* maximum include files            */
 117 #define MAXOUT          10              /* maximum # of diversions          */
 118 #define BUFSIZE         4096            /* starting size of pushback buffer */
 119 #define INITSTACKMAX    4096            /* starting size of call stack      */
 120 #define STRSPMAX        4096            /* starting size of string space    */
 121 #define MAXTOK          512             /* maximum chars in a tokn          */
 122 #define HASHSIZE        199             /* maximum size of hashtab          */
 123 #define MAXCCHARS       5               /* max size of comment/quote delim  */
 124
 125 #define ALL             1
 126 #define TOP             0
 127
 128 #define TRUE            1
 129 #define FALSE           0
 130 #define cycle           for(;;)
 131
 132 /*
 133  * m4 data structures
 134  */
 135
 136 typedef struct ndblock *ndptr;
 137
 138 struct ndblock {                /* hastable structure         */
 139         char            *name;  /* entry name..               */
 140         char            *defn;  /* definition..               */
 141         unsigned int    type;   /* type of the entry..        */
 142         unsigned int    hv;     /* hash function value..      */
 143         ndptr           nxtptr; /* link to next entry..       */
 144 };
 145
 146 #define nil     ((ndptr) 0)
 147
 148 struct keyblk {
 149         const char    *knam;    /* keyword name */
 150         int     ktyp;           /* keyword type */
 151 };
 152
 153 typedef union {                 /* stack structure */
 154         int     sfra;           /* frame entry  */
 155         char    *sstr;          /* string entry */
 156 } stae;
 157
 158 struct input_file {
 159         FILE            *file;
 160         char            *name;
 161         unsigned long   lineno;
 162         int             c;
 163 };
 164
 165 #define CURRENT_NAME    (infile[ilevel].name)
 166 #define CURRENT_LINE    (infile[ilevel].lineno)
 167 /*
 168  * macros for readibility and/or speed
 169  *
 170  *      pushf() - push a call frame entry onto stack
 171  *      pushs() - push a string pointer onto stack
 172  */
 173 #define pushf(x)                                        \
 174         do {                                            \
 175                 if ((uintptr_t)++sp == STACKMAX)        \
 176                         enlarge_stack();                \
 177                 mstack[sp].sfra = (x);                  \
 178                 sstack[sp] = 0;                         \
 179         } while (0)
 180
 181 #define pushs(x)                                        \
 182         do {                                            \
 183                 if ((uintptr_t)++sp == STACKMAX)        \
 184                         enlarge_stack();                \
 185                 mstack[sp].sstr = (x);                  \
 186                 sstack[sp] = 1;                         \
 187         } while (0)
 188
 189 #define pushs1(x)                                       \
 190         do {                                            \
 191                 if ((uintptr_t)++sp == STACKMAX)        \
 192                         enlarge_stack();                \
 193                 mstack[sp].sstr = (x);                  \
 194                 sstack[sp] = 0;                         \
 195         } while (0)
 196
 197 /*
 198  *          .                              .
 199  *      |   .   |  <-- sp               |  .  |
 200  *      +-------+                       +-----+
 201  *      | arg 3 ----------------------->| str |
 202  *      +-------+                       |  .  |
 203  *      | arg 2 ---PREVEP-----+            .
 204  *      +-------+             |
 205  *          .                 |         |     |
 206  *      +-------+             |         +-----+
 207  *      | plev  |  PARLEV     +-------->| str |
 208  *      +-------+                       |  .  |
 209  *      | type  |  CALTYP                  .
 210  *      +-------+
 211  *      | prcf  ---PREVFP--+
 212  *      +-------+          |
 213  *      |   .   |  PREVSP  |
 214  *          .              |
 215  *      +-------+          |
 216  *      |       <----------+
 217  *      +-------+
 218  *
 219  */
 220 #define PARLEV  (mstack[fp].sfra)
 221 #define CALTYP  (mstack[fp-1].sfra)
 222 #define PREVEP  (mstack[fp+3].sstr)
 223 #define PREVSP  (fp-3)
 224 #define PREVFP  (mstack[fp-2].sfra)