git.distorted.org.uk Git - u/mdw/catacomb/blob - math/qdparse.h

   1 /* -*-c-*-
   2  *
   3  * Quick-and-dirty parser
   4  *
   5  * (c) 2004 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of Catacomb.
  11  *
  12  * Catacomb is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU Library General Public License as
  14  * published by the Free Software Foundation; either version 2 of the
  15  * License, or (at your option) any later version.
  16  *
  17  * Catacomb is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU Library General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Library General Public
  23  * License along with Catacomb; if not, write to the Free
  24  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  25  * MA 02111-1307, USA.
  26  */
  27
  28 #ifndef CATACOMB_QDPARSE_H
  29 #define CATACOMB_QDPARSE_H
  30
  31 #ifdef __cplusplus
  32   extern "C" {
  33 #endif
  34
  35 /*----- Header files ------------------------------------------------------*/
  36
  37 #ifndef CATACOMB_MP_H
  38 #  include "mp.h"
  39 #endif
  40
  41 /*----- Data structures ---------------------------------------------------*/
  42
  43 typedef struct qd_parse {
  44   const char *p;                        /* Where we are right now */
  45   const char *e;                        /* Error string (output) */
  46 } qd_parse;
  47
  48 /*----- Functions provided ------------------------------------------------*/
  49
  50 /* --- @qd_skipspc@ --- *
  51  *
  52  * Arguments:   @qd_parse *qd@ = context
  53  *
  54  * Returns:     ---
  55  *
  56  * Use:         Skips spaces in the string.  No errors.
  57  */
  58
  59 extern void qd_skipspc(qd_parse */*qd*/);
  60
  61 /* --- @qd_delim@ --- *
  62  *
  63  * Arguments:   @qd_parse *qd@ = context
  64  *              @int ch@ = character to compare with
  65  *
  66  * Returns:     Nonzero if it was, zero if it wasn't.
  67  *
  68  * Use:         Checks the next (non-whitespace) character is what we
  69  *              expect.  If it is, the character is eaten; otherwise it's no
  70  *              big deal.
  71  */
  72
  73 extern int qd_delim(qd_parse */*qd*/, int /*ch*/);
  74
  75 /* --- @qd_enum@ --- *
  76  *
  77  * Arguments:   @qd_parse *qd@ = context
  78  *              @const char *e@ = list of enum strings, space separated
  79  *
  80  * Returns:     Index of the string matched, or @-1@.
  81  *
  82  * Use:         Matches a keyword.
  83  */
  84
  85 extern int qd_enum(qd_parse */*qd*/, const char */*e*/);
  86
  87 /* --- @qd_getmp@ --- *
  88  *
  89  * Arguments:   @qd_parse *qd@ = context
  90  *
  91  * Returns:     The integer extracted, or null.
  92  *
  93  * Use:         Parses a multiprecision integer from a string.
  94  */
  95
  96 extern mp *qd_getmp(qd_parse */*qd*/);
  97
  98 /* --- @qd_eofp@ --- *
  99  *
 100  * Arguments:   @qd_parse *qd@ = context
 101  *
 102  * Returns:     Nonzero if at EOF, zero otherwise.
 103  */
 104
 105 extern int qd_eofp(qd_parse */*qd*/);
 106
 107 /*----- That's all, folks -------------------------------------------------*/
 108
 109 #ifdef __cplusplus
 110   }
 111 #endif
 112
 113 #endif