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

   1 /* -*-c-*-
   2  *
   3  * $Id: anag.h,v 1.1 2001/02/04 17:14:42 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 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: anag.h,v $
  32  * Revision 1.1  2001/02/04 17:14:42  mdw
  33  * Initial checkin
  34  *
  35  */
  36
  37 #ifndef ANAG_H
  38 #define ANAG_H
  39
  40 #ifdef __cplusplus
  41   extern "C" {
  42 #endif
  43
  44 /*----- Header files ------------------------------------------------------*/
  45
  46 #include "config.h"
  47
  48 #include <assert.h>
  49 #include <ctype.h>
  50 #include <errno.h>
  51 #include <limits.h>
  52 #include <stdarg.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56
  57 /*----- Data structures ---------------------------------------------------*/
  58
  59 typedef struct node {
  60   int (*func)(struct node */*n*/, const char */*p*/, size_t /*sz*/);
  61 } node;
  62
  63 typedef struct dstr {
  64   char *buf;
  65   size_t len;
  66   size_t sz;
  67 } dstr;
  68
  69 #define DSTR_INIT { 0, 0, 0 }
  70
  71 /*----- Node types --------------------------------------------------------*/
  72
  73 extern node *anagram(const char *const */*av*/);
  74 extern node *subgram(const char *const */*av*/);
  75 extern node *wildcard(const char *const */*av*/);
  76 extern node *trackword(const char *const */*av*/);
  77
  78 /*----- Error reporting ---------------------------------------------------*/
  79
  80 /* --- @ego@ --- *
  81  *
  82  * Arguments:   @const char *p@ = pointer to program name
  83  *
  84  * Returns:     ---
  85  *
  86  * Use:         Stores what the program's name is.
  87  */
  88
  89 extern void ego(const char */*p*/);
  90
  91 /* --- @pquis@ --- *
  92  *
  93  * Arguments:   @FILE *fp@ = output stream to write on
  94  *              @const char *p@ = pointer to string to write
  95  *
  96  * Returns:     Zero if everything worked, EOF if not.
  97  *
  98  * Use:         Writes the string @p@ to the output stream @fp@.  Occurrences
  99  *              of the character `$' in @p@ are replaced by the program name
 100  *              as reported by @quis@.  A `$$' is replaced by a single `$'
 101  *              sign.
 102  */
 103
 104 extern int pquis(FILE */*fp*/, const char */*p*/);
 105
 106 /* --- @die@ --- *
 107  *
 108  * Arguments:   @const char *f@ = a @printf@-style format string
 109  *              @...@ = other arguments
 110  *
 111  * Returns:     Never.
 112  *
 113  * Use:         Reports an error and exits.
 114  */
 115
 116 extern void die(const char */*f*/, ...);
 117
 118 /*----- Memory allocation -------------------------------------------------*/
 119
 120 /* --- @xmalloc@ --- *
 121  *
 122  * Arguments:   @size_t sz@ = size of block to allocate
 123  *
 124  * Returns:     Pointer to allocated block.
 125  *
 126  * Use:         Allocates memory.  If there's not enough memory, the
 127  *              program exits.
 128  */
 129
 130 extern void *xmalloc(size_t /*sz*/);
 131
 132 /* --- @xrealloc@ --- *
 133  *
 134  * Arguments:   @void *p@ = a pointer to allocated memory
 135  *              @size_t sz@ = new size of block wanted
 136  *
 137  * Returns:     Pointer to resized block.
 138  *
 139  * Use:         Resizes an allocated block.  If there's not enough memory,
 140  *              the program exits.
 141  */
 142
 143 extern void *xrealloc(void */*p*/, size_t /*sz*/);
 144
 145 /*----- Dynamic string handling -------------------------------------------*/
 146
 147 /* --- @dstr_destroy@ --- *
 148  *
 149  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 150  *
 151  * Returns:     ---
 152  *
 153  * Use:         Reclaims the space used by a dynamic string.
 154  */
 155
 156 extern void dstr_destroy(dstr */*d*/);
 157
 158 /* --- @dstr_reset@ --- *
 159  *
 160  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 161  *
 162  * Returns:     ---
 163  *
 164  * Use:         Resets a string so that new data gets put at the beginning.
 165  */
 166
 167 extern void dstr_reset(dstr */*d*/);
 168
 169 /* --- @dstr_ensure@ --- *
 170  *
 171  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 172  *              @size_t sz@ = amount of free space to ensure
 173  *
 174  * Returns:     ---
 175  *
 176  * Use:         Ensures that at least @sz@ bytes are available in the
 177  *              given string.
 178  */
 179
 180 extern void dstr_ensure(dstr */*d*/, size_t /*sz*/);
 181
 182 /* --- @dstr_putline@ --- *
 183  *
 184  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 185  *              @FILE *fp@ = a stream to read from
 186  *
 187  * Returns:     The number of characters read into the buffer, or @EOF@ if
 188  *              end-of-file was reached before any characters were read.
 189  *
 190  * Use:         Appends the next line from the given input stream to the
 191  *              string.  A trailing newline is not added; a trailing null
 192  *              byte is appended, as for @dstr_putz@.
 193  */
 194
 195 extern int dstr_putline(dstr */*d*/, FILE */*fp*/);
 196
 197 /*----- That's all, folks -------------------------------------------------*/
 198
 199 #ifdef __cplusplus
 200   }
 201 #endif
 202
 203 #endif