mdw@git.distorted.org.uk Git - anag/blob - anag.h

   1 /* -*-c-*-
   2  *
   3  * $Id: anag.h,v 1.5 2004/04/08 01:36:19 mdw Exp $
   4  *
   5  * External definitions for Anag
   6  *
   7  * (c) 2001 Mark Wooding
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of Anag: a simple wordgame helper.
  13  *
  14  * Anag is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * Anag is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with Anag; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 #ifndef ANAG_H
  30 #define ANAG_H
  31
  32 #ifdef __cplusplus
  33   extern "C" {
  34 #endif
  35
  36 /*----- Header files ------------------------------------------------------*/
  37
  38 #include "config.h"
  39
  40 #include <assert.h>
  41 #include <ctype.h>
  42 #include <errno.h>
  43 #include <limits.h>
  44 #include <stdarg.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48
  49 /*----- Data structures ---------------------------------------------------*/
  50
  51 typedef struct node {
  52   int (*func)(struct node */*n*/, const char */*p*/, size_t /*sz*/);
  53 } node;
  54
  55 typedef struct dstr {
  56   char *buf;
  57   size_t len;
  58   size_t sz;
  59 } dstr;
  60
  61 #define DSTR_INIT { 0, 0, 0 }
  62
  63 /*----- Node types --------------------------------------------------------*/
  64
  65 extern node *anagram(const char *const */*av*/);
  66 extern node *subgram(const char *const */*av*/);
  67 extern node *wildcard(const char *const */*av*/);
  68 extern node *trackword(const char *const */*av*/);
  69 extern node *mono(const char *const */*av*/);
  70 extern node *regexp(const char *const */*av*/);
  71 extern node *pcrenode(const char *const */*av*/);
  72
  73 /*----- Error reporting ---------------------------------------------------*/
  74
  75 /* --- @ego@ --- *
  76  *
  77  * Arguments:   @const char *p@ = pointer to program name
  78  *
  79  * Returns:     ---
  80  *
  81  * Use:         Stores what the program's name is.
  82  */
  83
  84 extern void ego(const char */*p*/);
  85
  86 /* --- @pquis@ --- *
  87  *
  88  * Arguments:   @FILE *fp@ = output stream to write on
  89  *              @const char *p@ = pointer to string to write
  90  *
  91  * Returns:     Zero if everything worked, EOF if not.
  92  *
  93  * Use:         Writes the string @p@ to the output stream @fp@.  Occurrences
  94  *              of the character `$' in @p@ are replaced by the program name
  95  *              as reported by @quis@.  A `$$' is replaced by a single `$'
  96  *              sign.
  97  */
  98
  99 extern int pquis(FILE */*fp*/, const char */*p*/);
 100
 101 /* --- @die@ --- *
 102  *
 103  * Arguments:   @const char *f@ = a @printf@-style format string
 104  *              @...@ = other arguments
 105  *
 106  * Returns:     Never.
 107  *
 108  * Use:         Reports an error and exits.
 109  */
 110
 111 extern void die(const char */*f*/, ...);
 112
 113 /*----- Memory allocation -------------------------------------------------*/
 114
 115 /* --- @xmalloc@ --- *
 116  *
 117  * Arguments:   @size_t sz@ = size of block to allocate
 118  *
 119  * Returns:     Pointer to allocated block.
 120  *
 121  * Use:         Allocates memory.  If there's not enough memory, the
 122  *              program exits.
 123  */
 124
 125 extern void *xmalloc(size_t /*sz*/);
 126
 127 /* --- @xrealloc@ --- *
 128  *
 129  * Arguments:   @void *p@ = a pointer to allocated memory
 130  *              @size_t sz@ = new size of block wanted
 131  *
 132  * Returns:     Pointer to resized block.
 133  *
 134  * Use:         Resizes an allocated block.  If there's not enough memory,
 135  *              the program exits.
 136  */
 137
 138 extern void *xrealloc(void */*p*/, size_t /*sz*/);
 139
 140 /*----- Dynamic string handling -------------------------------------------*/
 141
 142 /* --- @dstr_destroy@ --- *
 143  *
 144  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 145  *
 146  * Returns:     ---
 147  *
 148  * Use:         Reclaims the space used by a dynamic string.
 149  */
 150
 151 extern void dstr_destroy(dstr */*d*/);
 152
 153 /* --- @dstr_reset@ --- *
 154  *
 155  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 156  *
 157  * Returns:     ---
 158  *
 159  * Use:         Resets a string so that new data gets put at the beginning.
 160  */
 161
 162 extern void dstr_reset(dstr */*d*/);
 163
 164 /* --- @dstr_ensure@ --- *
 165  *
 166  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 167  *              @size_t sz@ = amount of free space to ensure
 168  *
 169  * Returns:     ---
 170  *
 171  * Use:         Ensures that at least @sz@ bytes are available in the
 172  *              given string.
 173  */
 174
 175 extern void dstr_ensure(dstr */*d*/, size_t /*sz*/);
 176
 177 /* --- @dstr_putline@ --- *
 178  *
 179  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 180  *              @FILE *fp@ = a stream to read from
 181  *
 182  * Returns:     The number of characters read into the buffer, or @EOF@ if
 183  *              end-of-file was reached before any characters were read.
 184  *
 185  * Use:         Appends the next line from the given input stream to the
 186  *              string.  A trailing newline is not added; a trailing null
 187  *              byte is appended, as for @dstr_putz@.
 188  */
 189
 190 extern int dstr_putline(dstr */*d*/, FILE */*fp*/);
 191
 192 /*----- That's all, folks -------------------------------------------------*/
 193
 194 #ifdef __cplusplus
 195   }
 196 #endif
 197
 198 #endif