1 /* Copyright (C) 1997-2005, 2006 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #define _GCONV_INT_H 1
24 #include <stdlib.h> /* For alloca used in macro below. */
25 #include <ctype.h> /* For __toupper_l used in macro below. */
26 #include <string.h> /* For strlen et al used in macro below. */
27 #include <bits/libc-lock.h>
32 /* Type to represent search path. */
39 /* Variable with search path for `gconv' implementation. */
40 extern struct path_elem *__gconv_path_elem attribute_hidden;
41 /* Maximum length of a single path element. */
42 extern size_t __gconv_max_path_elem_len attribute_hidden;
45 /* Structure for alias definition. Simply two strings. */
53 /* How many character should be conveted in one call? */
54 #define GCONV_NCHAR_GOAL 8160
57 /* Structure describing one loaded shared object. This normally are
58 objects to perform conversation but as a special case the db shared
59 object is also handled. */
60 struct __gconv_loaded_object
62 /* Name of the object. It must be the first structure element. */
65 /* Reference counter for the db functionality. If no conversion is
66 needed we unload the db library. */
69 /* The handle for the shared object. */
72 /* Pointer to the functions the module defines. */
74 __gconv_init_fct init_fct;
75 __gconv_end_fct end_fct;
79 /* Description for an available conversion module. */
82 const char *from_string;
83 const char *to_string;
88 const char *module_name;
90 struct gconv_module *left; /* Prefix smaller. */
91 struct gconv_module *same; /* List of entries with identical prefix. */
92 struct gconv_module *right; /* Prefix larger. */
96 /* Internal data structure to represent transliteration module. */
100 struct trans_struct *next;
102 const char **csnames;
104 __gconv_trans_fct trans_fct;
105 __gconv_trans_context_fct trans_context_fct;
106 __gconv_trans_init_fct trans_init_fct;
107 __gconv_trans_end_fct trans_end_fct;
111 /* Flags for `gconv_open'. */
114 GCONV_AVOID_NOCONV = 1 << 0
118 /* Global variables. */
120 /* Database of alias names. */
121 extern void *__gconv_alias_db attribute_hidden;
123 /* Array with available modules. */
124 extern size_t __gconv_nmodules;
125 extern struct gconv_module *__gconv_modules_db attribute_hidden;
127 /* Value of the GCONV_PATH environment variable. */
128 extern const char *__gconv_path_envvar attribute_hidden;
130 /* Lock for the conversion database content. */
131 __libc_lock_define (extern, __gconv_lock attribute_hidden)
134 /* The gconv functions expects the name to be in upper case and complete,
135 including the trailing slashes if necessary. */
136 #define norm_add_slashes(str,suffix) \
138 const char *cp = (str); \
142 const size_t suffix_len = strlen (suffix); \
144 while (*cp != '\0') \
148 tmp = result = __alloca (cp - (str) + 3 + suffix_len); \
150 while (*cp != '\0') \
151 *tmp++ = __toupper_l (*cp++, _nl_C_locobj_ptr); \
158 if (suffix_len != 0) \
159 tmp = __mempcpy (tmp, suffix, suffix_len); \
167 /* Return in *HANDLE decriptor for transformation from FROMSET to TOSET. */
168 extern int __gconv_open (const char *toset, const char *fromset,
169 __gconv_t *handle, int flags)
172 /* Free resources associated with transformation descriptor CD. */
173 extern int __gconv_close (__gconv_t cd)
176 /* Transform at most *INBYTESLEFT bytes from buffer starting at *INBUF
177 according to rules described by CD and place up to *OUTBYTESLEFT
178 bytes in buffer starting at *OUTBUF. Return number of non-identical
179 conversions in *IRREVERSIBLE if this pointer is not null. */
180 extern int __gconv (__gconv_t cd, const unsigned char **inbuf,
181 const unsigned char *inbufend, unsigned char **outbuf,
182 unsigned char *outbufend, size_t *irreversible)
185 /* Return in *HANDLE a pointer to an array with *NSTEPS elements describing
186 the single steps necessary for transformation from FROMSET to TOSET. */
187 extern int __gconv_find_transform (const char *toset, const char *fromset,
188 struct __gconv_step **handle,
189 size_t *nsteps, int flags)
192 /* Search for transformation in cache data. */
193 extern int __gconv_lookup_cache (const char *toset, const char *fromset,
194 struct __gconv_step **handle, size_t *nsteps,
198 /* Compare the two name for whether they are after alias expansion the
199 same. This function uses the cache and fails if none is
201 extern int __gconv_compare_alias_cache (const char *name1, const char *name2,
202 int *result) internal_function;
204 /* Free data associated with a step's structure. */
205 extern void __gconv_release_step (struct __gconv_step *step)
208 /* Read all the configuration data and cache it. */
209 extern void __gconv_read_conf (void) attribute_hidden;
211 /* Try to read module cache file. */
212 extern int __gconv_load_cache (void) internal_function;
214 /* Retrieve pointer to internal cache. */
215 extern void *__gconv_get_cache (void);
217 /* Retrieve pointer to internal module database. */
218 extern struct gconv_module *__gconv_get_modules_db (void);
220 /* Retrieve pointer to internal alias database. */
221 extern void *__gconv_get_alias_db (void);
223 /* Determine the directories we are looking in. */
224 extern void __gconv_get_path (void) internal_function;
226 /* Comparison function to search alias. */
227 extern int __gconv_alias_compare (const void *p1, const void *p2)
230 /* Clear reference to transformation step implementations which might
231 cause the code to be unloaded. */
232 extern int __gconv_close_transform (struct __gconv_step *steps,
236 /* Free all resources allocated for the transformation record when
238 extern void __gconv_release_cache (struct __gconv_step *steps, size_t nsteps)
241 /* Load shared object named by NAME. If already loaded increment reference
243 extern struct __gconv_loaded_object *__gconv_find_shlib (const char *name)
246 /* Release shared object. If no further reference is available unload
248 extern void __gconv_release_shlib (struct __gconv_loaded_object *handle)
251 /* Fill STEP with information about builtin module with NAME. */
252 extern void __gconv_get_builtin_trans (const char *name,
253 struct __gconv_step *step)
256 /* Try to load transliteration step module. */
257 extern int __gconv_translit_find (struct trans_struct *trans)
260 /* Transliteration using the locale's data. */
261 extern int __gconv_transliterate (struct __gconv_step *step,
262 struct __gconv_step_data *step_data,
264 __const unsigned char *inbufstart,
265 __const unsigned char **inbufp,
266 __const unsigned char *inbufend,
267 unsigned char **outbufstart,
268 size_t *irreversible) attribute_hidden;
271 /* If NAME is an codeset alias expand it. */
272 extern int __gconv_compare_alias (const char *name1, const char *name2)
276 /* Builtin transformations. */
278 # define __BUILTIN_TRANSFORM(Name) \
279 extern int Name (struct __gconv_step *step, \
280 struct __gconv_step_data *data, \
281 const unsigned char **inbuf, \
282 const unsigned char *inbufend, \
283 unsigned char **outbufstart, size_t *irreversible, \
284 int do_flush, int consume_incomplete)
286 __BUILTIN_TRANSFORM (__gconv_transform_ascii_internal);
287 __BUILTIN_TRANSFORM (__gconv_transform_internal_ascii);
288 __BUILTIN_TRANSFORM (__gconv_transform_utf8_internal);
289 __BUILTIN_TRANSFORM (__gconv_transform_internal_utf8);
290 __BUILTIN_TRANSFORM (__gconv_transform_ucs2_internal);
291 __BUILTIN_TRANSFORM (__gconv_transform_internal_ucs2);
292 __BUILTIN_TRANSFORM (__gconv_transform_ucs2reverse_internal);
293 __BUILTIN_TRANSFORM (__gconv_transform_internal_ucs2reverse);
294 __BUILTIN_TRANSFORM (__gconv_transform_internal_ucs4);
295 __BUILTIN_TRANSFORM (__gconv_transform_ucs4_internal);
296 __BUILTIN_TRANSFORM (__gconv_transform_internal_ucs4le);
297 __BUILTIN_TRANSFORM (__gconv_transform_ucs4le_internal);
298 __BUILTIN_TRANSFORM (__gconv_transform_internal_utf16);
299 __BUILTIN_TRANSFORM (__gconv_transform_utf16_internal);
300 # undef __BUITLIN_TRANSFORM
302 /* Specialized conversion function for a single byte to INTERNAL, recognizing
303 only ASCII characters. */
304 extern wint_t __gconv_btwoc_ascii (struct __gconv_step *step, unsigned char c);
310 #endif /* gconv_int.h */