src/ecs.h

   1 /*
   2    Basic support for extended character sets.
   3
   4    Written by:
   5    Roland Illig <roland.illig@gmx.de>, 2005.
   6
   7    This file is part of the Midnight Commander.
   8
   9    The Midnight Commander is free software; you can redistribute it
  10    and/or modify it under the terms of the GNU General Public License as
  11    published by the Free Software Foundation; either version 2 of the
  12    License, or (at your option) any later version.
  13
  14    The Midnight Commander is distributed in the hope that it will be
  15    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  16    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17    General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  22    MA 02110-1301, USA.
  23  */
  24
  25 /** \file  ecs.h
  26  *  \brief Header: basic support for extended character sets
  27  */
  28
  29 #ifndef MC_ECS_H
  30 #define MC_ECS_H
  31
  32 /*
  33  * This header provides string processing functions for extended
  34  * character sets (ECS), as well as for the traditional one-to-one
  35  * byte-to-character encoding.
  36  */
  37
  38 #include <sys/types.h>          /* size_t */
  39
  40 #include "lib/global.h"         /* include <glib.h> */
  41
  42 /* Use the macros ECS_CHAR and ECS_STR to bring character and string
  43  * literals to the correct form required by the C compiler. */
  44 #ifdef EXTCHARSET_ENABLED
  45 #  include <stdlib.h>
  46 typedef wchar_t ecs_char;
  47 #  define ECS_CHAR(c)           (L##c)
  48 #  define ECS_STR(s)            (L##s)
  49 #else
  50 typedef char ecs_char;
  51 #  define ECS_CHAR(c)           (c)
  52 #  define ECS_STR(s)            (s)
  53 #endif
  54
  55 /*
  56  * String conversion functions between the wide character encoding and
  57  * the multibyte encoding. The returned strings should be freed using
  58  * g_free after use. The return value is TRUE if the string is valid
  59  * and has been converted, FALSE otherwise.
  60  */
  61
  62 extern gboolean ecs_mbstr_to_str(ecs_char **ret_str, const char *);
  63 extern gboolean ecs_str_to_mbstr(char **ret_str, const ecs_char *);
  64
  65 /*
  66  * Replacements for the ISO C90 <ctype.h> functions.
  67  */
  68
  69 extern gboolean ecs_isalnum(ecs_char);
  70 extern gboolean ecs_isalpha(ecs_char);
  71 extern gboolean ecs_iscntrl(ecs_char);
  72 extern gboolean ecs_isdigit(ecs_char);
  73 extern gboolean ecs_isgraph(ecs_char);
  74 extern gboolean ecs_islower(ecs_char);
  75 extern gboolean ecs_isprint(ecs_char);
  76 extern gboolean ecs_ispunct(ecs_char);
  77 extern gboolean ecs_isspace(ecs_char);
  78 extern gboolean ecs_isupper(ecs_char);
  79 extern gboolean ecs_isxdigit(ecs_char);
  80
  81 /*
  82  * Replacements for the ISO C90 <string.h> functions.
  83  */
  84
  85 /* left out: ecs_strcpy */
  86 /* left out: ecs_strncpy */
  87 /* left out: ecs_strcat */
  88 /* left out: ecs_strncat */
  89 extern int ecs_strcmp(const ecs_char *, const ecs_char *);
  90 /* left out: ecs_strcoll */
  91 /* left out: ecs_strncmp */
  92 /* left out: ecs_strxfrm */
  93 extern ecs_char *ecs_strchr(const ecs_char *, ecs_char);
  94 extern size_t ecs_strcspn(const ecs_char *, const ecs_char *);
  95 /* left out: ecs_strpbrk */
  96 extern ecs_char *ecs_strrchr(const ecs_char *, ecs_char);
  97 extern size_t ecs_strspn(const ecs_char *, const ecs_char *);
  98 extern ecs_char *ecs_strstr(const ecs_char *, const ecs_char *);
  99 /* left out: ecs_strtok */
 100 extern size_t ecs_strlen(const ecs_char *);
 101
 102 /*
 103  * Other string functions.
 104  */
 105
 106 /* allocates a copy of the string. Never returns NULL. */
 107 extern ecs_char *ecs_xstrdup(const ecs_char *);
 108
 109 extern size_t ecs_strlcpy(ecs_char *, const ecs_char *, size_t);
 110 extern size_t ecs_strlcat(ecs_char *, const ecs_char *, size_t);
 111
 112 /* calculates the bounds of the box that the string would occupy when
 113  * displayed on screen. Returns TRUE if all characters in the string are
 114  * either '\n' or printable, according to the current locale. If the
 115  * return value is FALSE, ''width'' and ''height'' are not modified. */
 116 extern gboolean ecs_strbox(const ecs_char *, size_t *ret_width,
 117         size_t *ret_height);
 118
 119 #endif