usr.bin/m4/mdef.h

   1 /*      $OpenBSD: mdef.h,v 1.33 2015/11/03 16:21:47 deraadt 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  * $FreeBSD$
  37  */
  38
  39 #ifdef __GNUC__
  40 # define UNUSED __attribute__((__unused__))
  41 #else
  42 # define UNUSED
  43 #endif
  44
  45 #define MACRTYPE        1
  46 #define DEFITYPE        2
  47 #define EXPRTYPE        3
  48 #define SUBSTYPE        4
  49 #define IFELTYPE        5
  50 #define LENGTYPE        6
  51 #define CHNQTYPE        7
  52 #define SYSCTYPE        8
  53 #define UNDFTYPE        9
  54 #define INCLTYPE        10
  55 #define SINCTYPE        11
  56 #define PASTTYPE        12
  57 #define SPASTYPE        13
  58 #define INCRTYPE        14
  59 #define IFDFTYPE        15
  60 #define PUSDTYPE        16
  61 #define POPDTYPE        17
  62 #define SHIFTYPE        18
  63 #define DECRTYPE        19
  64 #define DIVRTYPE        20
  65 #define UNDVTYPE        21
  66 #define DIVNTYPE        22
  67 #define MKTMTYPE        23
  68 #define ERRPTYPE        24
  69 #define M4WRTYPE        25
  70 #define TRNLTYPE        26
  71 #define DNLNTYPE        27
  72 #define DUMPTYPE        28
  73 #define CHNCTYPE        29
  74 #define INDXTYPE        30
  75 #define SYSVTYPE        31
  76 #define EXITTYPE        32
  77 #define DEFNTYPE        33
  78 #define SELFTYPE        34
  79 #define INDIRTYPE       35
  80 #define BUILTINTYPE     36
  81 #define PATSTYPE        37
  82 #define FILENAMETYPE    38
  83 #define LINETYPE        39
  84 #define REGEXPTYPE      40
  85 #define ESYSCMDTYPE     41
  86 #define TRACEONTYPE     42
  87 #define TRACEOFFTYPE    43
  88 #define FORMATTYPE      44
  89
  90 #define BUILTIN_MARKER  "__builtin_"
  91
  92 #define TYPEMASK        63      /* Keep bits really corresponding to a type. */
  93 #define RECDEF          256     /* Pure recursive def, don't expand it */
  94 #define NOARGS          512     /* builtin needs no args */
  95 #define NEEDARGS        1024    /* mark builtin that need args with this */
  96
  97 /*
  98  * m4 special characters
  99  */
 100
 101 #define ARGFLAG         '$'
 102 #define LPAREN          '('
 103 #define RPAREN          ')'
 104 #define LQUOTE          '`'
 105 #define RQUOTE          '\''
 106 #define COMMA           ','
 107 #define SCOMMT          '#'
 108 #define ECOMMT          '\n'
 109
 110 /*
 111  * other important constants
 112  */
 113
 114 #define EOS             '\0'
 115 #define MAXINP          10              /* maximum include files            */
 116 #define MAXOUT          10              /* maximum # of diversions          */
 117 #define BUFSIZE         4096            /* starting size of pushback buffer */
 118 #define INITSTACKMAX    4096            /* starting size of call stack      */
 119 #define STRSPMAX        4096            /* starting size of string space    */
 120 #define MAXTOK          512             /* maximum chars in a tokn          */
 121 #define MAXCCHARS       5               /* max size of comment/quote delim  */
 122
 123 #define ALL             1
 124 #define TOP             0
 125
 126 #define TRUE            1
 127 #define FALSE           0
 128 #define cycle           for(;;)
 129
 130 /*
 131  * m4 data structures
 132  */
 133
 134 typedef struct ndblock *ndptr;
 135
 136 struct macro_definition {
 137         struct macro_definition *next;
 138         char            *defn;  /* definition..               */
 139         unsigned int    type;   /* type of the entry..        */
 140 };
 141
 142
 143 struct ndblock {                        /* hashtable structure         */
 144         unsigned int            builtin_type;
 145         unsigned int            trace_flags;
 146         struct macro_definition *d;
 147         char            name[1];        /* entry name..               */
 148 };
 149
 150 typedef union {                 /* stack structure */
 151         int     sfra;           /* frame entry  */
 152         char    *sstr;          /* string entry */
 153 } stae;
 154
 155 struct input_file {
 156         FILE            *file;
 157         char            *name;
 158         unsigned long   lineno;
 159         unsigned long   synch_lineno;   /* used for -s */
 160         int             c;
 161 };
 162
 163 #define STORAGE_STRSPACE 0
 164 #define STORAGE_MACRO 1
 165 #define STORAGE_OTHER 2
 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 (++sp == (int)STACKMAX)      \
 180                         enlarge_stack();\
 181                 mstack[sp].sfra = (x);  \
 182                 sstack[sp] = STORAGE_OTHER; \
 183         } while (0)
 184
 185 #define pushs(x)                        \
 186         do {                            \
 187                 if (++sp == (int)STACKMAX)      \
 188                         enlarge_stack();\
 189                 mstack[sp].sstr = (x);  \
 190                 sstack[sp] = STORAGE_STRSPACE; \
 191         } while (0)
 192
 193 #define pushs1(x)                       \
 194         do {                            \
 195                 if (++sp == (int)STACKMAX)      \
 196                         enlarge_stack();\
 197                 mstack[sp].sstr = (x);  \
 198                 sstack[sp] = STORAGE_OTHER; \
 199         } while (0)
 200
 201 #define pushdef(p)                      \
 202         do {                            \
 203                 if (++sp == (int)STACKMAX)      \
 204                         enlarge_stack();\
 205                 mstack[sp].sstr = macro_getdef(p)->defn;\
 206                 sstack[sp] = STORAGE_MACRO; \
 207         } while (0)
 208
 209
 210 /*
 211  *          .                              .
 212  *      |   .   |  <-- sp               |  .  |
 213  *      +-------+                       +-----+
 214  *      | arg 3 ----------------------->| str |
 215  *      +-------+                       |  .  |
 216  *      | arg 2 ---PREVEP-----+            .
 217  *      +-------+             |
 218  *          .                 |         |     |
 219  *      +-------+             |         +-----+
 220  *      | plev  |  PARLEV     +-------->| str |
 221  *      +-------+                       |  .  |
 222  *      | type  |  CALTYP                  .
 223  *      +-------+
 224  *      | prcf  ---PREVFP--+
 225  *      +-------+          |
 226  *      |   .   |  PREVSP  |
 227  *          .              |
 228  *      +-------+          |
 229  *      |       <----------+
 230  *      +-------+
 231  *
 232  */
 233 #define PARLEV  (mstack[fp].sfra)
 234 #define CALTYP  (mstack[fp-2].sfra)
 235 #define TRACESTATUS (mstack[fp-1].sfra)
 236 #define PREVEP  (mstack[fp+3].sstr)
 237 #define PREVSP  (fp-4)
 238 #define PREVFP  (mstack[fp-3].sfra)