usr.bin/m4/mdef.h

   1 /*      $OpenBSD: mdef.h,v 1.31 2011/09/27 07:24:02 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  * $FreeBSD: src/usr.bin/m4/mdef.h,v 1.13 2012/11/17 01:54:24 svnexp Exp $
  37  */
  38
  39 #define MACRTYPE        1
  40 #define DEFITYPE        2
  41 #define EXPRTYPE        3
  42 #define SUBSTYPE        4
  43 #define IFELTYPE        5
  44 #define LENGTYPE        6
  45 #define CHNQTYPE        7
  46 #define SYSCTYPE        8
  47 #define UNDFTYPE        9
  48 #define INCLTYPE        10
  49 #define SINCTYPE        11
  50 #define PASTTYPE        12
  51 #define SPASTYPE        13
  52 #define INCRTYPE        14
  53 #define IFDFTYPE        15
  54 #define PUSDTYPE        16
  55 #define POPDTYPE        17
  56 #define SHIFTYPE        18
  57 #define DECRTYPE        19
  58 #define DIVRTYPE        20
  59 #define UNDVTYPE        21
  60 #define DIVNTYPE        22
  61 #define MKTMTYPE        23
  62 #define ERRPTYPE        24
  63 #define M4WRTYPE        25
  64 #define TRNLTYPE        26
  65 #define DNLNTYPE        27
  66 #define DUMPTYPE        28
  67 #define CHNCTYPE        29
  68 #define INDXTYPE        30
  69 #define SYSVTYPE        31
  70 #define EXITTYPE        32
  71 #define DEFNTYPE        33
  72 #define SELFTYPE        34
  73 #define INDIRTYPE       35
  74 #define BUILTINTYPE     36
  75 #define PATSTYPE        37
  76 #define FILENAMETYPE    38
  77 #define LINETYPE        39
  78 #define REGEXPTYPE      40
  79 #define ESYSCMDTYPE     41
  80 #define TRACEONTYPE     42
  81 #define TRACEOFFTYPE    43
  82 #define FORMATTYPE      44
  83
  84 #define BUILTIN_MARKER  "__builtin_"
  85
  86 #define TYPEMASK        63      /* Keep bits really corresponding to a type. */
  87 #define RECDEF          256     /* Pure recursive def, don't expand it */
  88 #define NOARGS          512     /* builtin needs no args */
  89 #define NEEDARGS        1024    /* mark builtin that need args with this */
  90
  91 /*
  92  * m4 special characters
  93  */
  94
  95 #define ARGFLAG         '$'
  96 #define LPAREN          '('
  97 #define RPAREN          ')'
  98 #define LQUOTE          '`'
  99 #define RQUOTE          '\''
 100 #define COMMA           ','
 101 #define SCOMMT          '#'
 102 #define ECOMMT          '\n'
 103
 104 #ifdef msdos
 105 #define system(str)     (-1)
 106 #endif
 107
 108 /*
 109  * other important constants
 110  */
 111
 112 #define EOS             '\0'
 113 #define MAXINP          10              /* maximum include files            */
 114 #define MAXOUT          10              /* maximum # of diversions          */
 115 #define BUFSIZE         4096            /* starting size of pushback buffer */
 116 #define INITSTACKMAX    4096            /* starting size of call stack      */
 117 #define STRSPMAX        4096            /* starting size of string space    */
 118 #define MAXTOK          512             /* maximum chars in a tokn          */
 119 #define MAXCCHARS       5               /* max size of comment/quote delim  */
 120
 121 #define ALL             1
 122 #define TOP             0
 123
 124 #define TRUE            1
 125 #define FALSE           0
 126
 127 /*
 128  * m4 data structures
 129  */
 130
 131 typedef struct ndblock *ndptr;
 132
 133 struct macro_definition {
 134         struct macro_definition *next;
 135         char            *defn;  /* definition..               */
 136         unsigned int    type;   /* type of the entry..        */
 137 };
 138
 139
 140 struct ndblock {                        /* hashtable structure         */
 141         unsigned int            builtin_type;
 142         unsigned int            trace_flags;
 143         struct macro_definition *d;
 144         char            name[1];        /* entry name..               */
 145 };
 146
 147 typedef union {                 /* stack structure */
 148         int     sfra;           /* frame entry  */
 149         char    *sstr;          /* string entry */
 150 } stae;
 151
 152 struct input_file {
 153         FILE            *file;
 154         char            *name;
 155         unsigned long   lineno;
 156         unsigned long   synch_lineno;   /* used for -s */
 157         int             c;
 158 };
 159
 160 #define CURRENT_NAME    (infile[ilevel].name)
 161 #define CURRENT_LINE    (infile[ilevel].lineno)
 162 /*
 163  * macros for readibility and/or speed
 164  *
 165  *      gpbc()  - get a possibly pushed-back character
 166  *      pushf() - push a call frame entry onto stack
 167  *      pushs() - push a string pointer onto stack
 168  */
 169 #define gpbc()   (bp > bufbase) ? *--bp : obtain_char(infile+ilevel)
 170 #define pushf(x)                        \
 171         do {                            \
 172                 if (++sp == (int)STACKMAX)      \
 173                         enlarge_stack();\
 174                 mstack[sp].sfra = (x);  \
 175                 sstack[sp] = 0; \
 176         } while (0)
 177
 178 #define pushs(x)                        \
 179         do {                            \
 180                 if (++sp == (int)STACKMAX)      \
 181                         enlarge_stack();\
 182                 mstack[sp].sstr = (x);  \
 183                 sstack[sp] = 1; \
 184         } while (0)
 185
 186 #define pushs1(x)                       \
 187         do {                            \
 188                 if (++sp == (int)STACKMAX)      \
 189                         enlarge_stack();\
 190                 mstack[sp].sstr = (x);  \
 191                 sstack[sp] = 0; \
 192         } while (0)
 193
 194 /*
 195  *          .                              .
 196  *      |   .   |  <-- sp               |  .  |
 197  *      +-------+                       +-----+
 198  *      | arg 3 ----------------------->| str |
 199  *      +-------+                       |  .  |
 200  *      | arg 2 ---PREVEP-----+            .
 201  *      +-------+             |
 202  *          .                 |         |     |
 203  *      +-------+             |         +-----+
 204  *      | plev  |  PARLEV     +-------->| str |
 205  *      +-------+                       |  .  |
 206  *      | type  |  CALTYP                  .
 207  *      +-------+
 208  *      | prcf  ---PREVFP--+
 209  *      +-------+          |
 210  *      |   .   |  PREVSP  |
 211  *          .              |
 212  *      +-------+          |
 213  *      |       <----------+
 214  *      +-------+
 215  *
 216  */
 217 #define PARLEV  (mstack[fp].sfra)
 218 #define CALTYP  (mstack[fp - 2].sfra)
 219 #define TRACESTATUS (mstack[fp - 1].sfra)
 220 #define PREVEP  (mstack[fp + 3].sstr)
 221 #define PREVSP  (fp - 4)
 222 #define PREVFP  (mstack[fp - 3].sfra)