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

   1 /* -*-c-*-
   2  *
   3  * $Id$
   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 extern node *longest(const char *const */*av*/);
  73 extern node *shortest(const char *const */*av*/);
  74
  75 /*----- Exit codes --------------------------------------------------------*/
  76
  77 #define EX_OK 0
  78 #define EX_NONE 1
  79 #define EX_FAIL 127
  80
  81 /*----- Error reporting ---------------------------------------------------*/
  82
  83 /* --- @ego@ --- *
  84  *
  85  * Arguments:   @const char *p@ = pointer to program name
  86  *
  87  * Returns:     ---
  88  *
  89  * Use:         Stores what the program's name is.
  90  */
  91
  92 extern void ego(const char */*p*/);
  93
  94 /* --- @pquis@ --- *
  95  *
  96  * Arguments:   @FILE *fp@ = output stream to write on
  97  *              @const char *p@ = pointer to string to write
  98  *
  99  * Returns:     Zero if everything worked, EOF if not.
 100  *
 101  * Use:         Writes the string @p@ to the output stream @fp@.  Occurrences
 102  *              of the character `$' in @p@ are replaced by the program name
 103  *              as reported by @quis@.  A `$$' is replaced by a single `$'
 104  *              sign.
 105  */
 106
 107 extern int pquis(FILE */*fp*/, const char */*p*/);
 108
 109 /* --- @die@ --- *
 110  *
 111  * Arguments:   @const char *f@ = a @printf@-style format string
 112  *              @...@ = other arguments
 113  *
 114  * Returns:     Never.
 115  *
 116  * Use:         Reports an error and exits.
 117  */
 118
 119 extern void die(const char */*f*/, ...);
 120
 121 /*----- Memory allocation -------------------------------------------------*/
 122
 123 /* --- @xmalloc@ --- *
 124  *
 125  * Arguments:   @size_t sz@ = size of block to allocate
 126  *
 127  * Returns:     Pointer to allocated block.
 128  *
 129  * Use:         Allocates memory.  If there's not enough memory, the
 130  *              program exits.
 131  */
 132
 133 extern void *xmalloc(size_t /*sz*/);
 134
 135 /* --- @xrealloc@ --- *
 136  *
 137  * Arguments:   @void *p@ = a pointer to allocated memory
 138  *              @size_t sz@ = new size of block wanted
 139  *
 140  * Returns:     Pointer to resized block.
 141  *
 142  * Use:         Resizes an allocated block.  If there's not enough memory,
 143  *              the program exits.
 144  */
 145
 146 extern void *xrealloc(void */*p*/, size_t /*sz*/);
 147
 148 /*----- Dynamic string handling -------------------------------------------*/
 149
 150 /* --- @dstr_destroy@ --- *
 151  *
 152  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 153  *
 154  * Returns:     ---
 155  *
 156  * Use:         Reclaims the space used by a dynamic string.
 157  */
 158
 159 extern void dstr_destroy(dstr */*d*/);
 160
 161 /* --- @dstr_reset@ --- *
 162  *
 163  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 164  *
 165  * Returns:     ---
 166  *
 167  * Use:         Resets a string so that new data gets put at the beginning.
 168  */
 169
 170 extern void dstr_reset(dstr */*d*/);
 171
 172 /* --- @dstr_ensure@ --- *
 173  *
 174  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 175  *              @size_t sz@ = amount of free space to ensure
 176  *
 177  * Returns:     ---
 178  *
 179  * Use:         Ensures that at least @sz@ bytes are available in the
 180  *              given string.
 181  */
 182
 183 extern void dstr_ensure(dstr */*d*/, size_t /*sz*/);
 184
 185 /* --- @dstr_putline@ --- *
 186  *
 187  * Arguments:   @dstr *d@ = pointer to a dynamic string block
 188  *              @FILE *fp@ = a stream to read from
 189  *
 190  * Returns:     The number of characters read into the buffer, or @EOF@ if
 191  *              end-of-file was reached before any characters were read.
 192  *
 193  * Use:         Appends the next line from the given input stream to the
 194  *              string.  A trailing newline is not added; a trailing null
 195  *              byte is appended, as for @dstr_putz@.
 196  */
 197
 198 extern int dstr_putline(dstr */*d*/, FILE */*fp*/);
 199
 200 /*----- Infrastructure ----------------------------------------------------*/
 201
 202 /* --- @atend_register@ --- *
 203  *
 204  * Arguments:   @int (*func)(void *)@ = function to call
 205  *              @void *p@ = handle to pass to it
 206  *
 207  * Returns:     ---
 208  *
 209  * Use:         Adds a function to the list of things to do at the end of the
 210  *              program.  The function should return nonzero if it produced
 211  *              any output.
 212  */
 213
 214 extern void atend_register(int (*/*func*/)(void */*p*/), void */*p*/);
 215
 216 /*----- That's all, folks -------------------------------------------------*/
 217
 218 #ifdef __cplusplus
 219   }
 220 #endif
 221
 222 #endif