286 lines
9.0 KiB
C
286 lines
9.0 KiB
C
/* Copyright (C) 1997,1998,1999,2000,2001,2002 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#ifndef _GCONV_INT_H
|
|
#define _GCONV_INT_H 1
|
|
|
|
#include "gconv.h"
|
|
|
|
__BEGIN_DECLS
|
|
|
|
|
|
/* Type to represent search path. */
|
|
struct path_elem
|
|
{
|
|
const char *name;
|
|
size_t len;
|
|
};
|
|
|
|
/* Variable with search path for `gconv' implementation. */
|
|
extern struct path_elem *__gconv_path_elem attribute_hidden;
|
|
/* Maximum length of a single path element. */
|
|
extern size_t __gconv_max_path_elem_len attribute_hidden;
|
|
|
|
|
|
/* Structure for alias definition. Simply two strings. */
|
|
struct gconv_alias
|
|
{
|
|
char *fromname;
|
|
char *toname;
|
|
};
|
|
|
|
|
|
/* How many character should be conveted in one call? */
|
|
#define GCONV_NCHAR_GOAL 8160
|
|
|
|
|
|
/* Structure describing one loaded shared object. This normally are
|
|
objects to perform conversation but as a special case the db shared
|
|
object is also handled. */
|
|
struct __gconv_loaded_object
|
|
{
|
|
/* Name of the object. It must be the first structure element. */
|
|
const char *name;
|
|
|
|
/* Reference counter for the db functionality. If no conversion is
|
|
needed we unload the db library. */
|
|
int counter;
|
|
|
|
/* The handle for the shared object. */
|
|
void *handle;
|
|
|
|
/* Pointer to the functions the module defines. */
|
|
__gconv_fct fct;
|
|
__gconv_init_fct init_fct;
|
|
__gconv_end_fct end_fct;
|
|
};
|
|
|
|
|
|
/* Description for an available conversion module. */
|
|
struct gconv_module
|
|
{
|
|
const char *from_string;
|
|
const char *to_string;
|
|
|
|
int cost_hi;
|
|
int cost_lo;
|
|
|
|
const char *module_name;
|
|
|
|
struct gconv_module *left; /* Prefix smaller. */
|
|
struct gconv_module *same; /* List of entries with identical prefix. */
|
|
struct gconv_module *right; /* Prefix larger. */
|
|
};
|
|
|
|
|
|
/* Internal data structure to represent transliteration module. */
|
|
struct trans_struct
|
|
{
|
|
const char *name;
|
|
struct trans_struct *next;
|
|
|
|
const char **csnames;
|
|
size_t ncsnames;
|
|
__gconv_trans_fct trans_fct;
|
|
__gconv_trans_context_fct trans_context_fct;
|
|
__gconv_trans_init_fct trans_init_fct;
|
|
__gconv_trans_end_fct trans_end_fct;
|
|
};
|
|
|
|
|
|
/* Flags for `gconv_open'. */
|
|
enum
|
|
{
|
|
GCONV_AVOID_NOCONV = 1 << 0
|
|
};
|
|
|
|
|
|
/* Global variables. */
|
|
|
|
/* Database of alias names. */
|
|
extern void *__gconv_alias_db;
|
|
|
|
/* Array with available modules. */
|
|
extern size_t __gconv_nmodules;
|
|
extern struct gconv_module *__gconv_modules_db;
|
|
|
|
/* Value of the GCONV_PATH environment variable. */
|
|
extern const char *__gconv_path_envvar attribute_hidden;
|
|
|
|
|
|
/* The gconv functions expects the name to be in upper case and complete,
|
|
including the trailing slashes if necessary. */
|
|
#define norm_add_slashes(str,suffix) \
|
|
({ \
|
|
const char *cp = (str); \
|
|
char *result; \
|
|
char *tmp; \
|
|
size_t cnt = 0; \
|
|
size_t suffix_len = (suffix) == NULL ? 0 : strlen (suffix); \
|
|
\
|
|
while (*cp != '\0') \
|
|
if (*cp++ == '/') \
|
|
++cnt; \
|
|
\
|
|
tmp = result = alloca (cp - (str) + 3 + suffix_len); \
|
|
cp = (str); \
|
|
while (*cp != '\0') \
|
|
*tmp++ = __toupper_l (*cp++, &_nl_C_locobj); \
|
|
if (cnt < 2) \
|
|
{ \
|
|
*tmp++ = '/'; \
|
|
if (cnt < 1) \
|
|
{ \
|
|
*tmp++ = '/'; \
|
|
if (suffix != NULL) \
|
|
tmp = __mempcpy (tmp, suffix, suffix_len); \
|
|
} \
|
|
} \
|
|
*tmp = '\0'; \
|
|
result; \
|
|
})
|
|
|
|
|
|
/* Return in *HANDLE decriptor for transformation from FROMSET to TOSET. */
|
|
extern int __gconv_open (const char *toset, const char *fromset,
|
|
__gconv_t *handle, int flags)
|
|
internal_function;
|
|
|
|
/* Free resources associated with transformation descriptor CD. */
|
|
extern int __gconv_close (__gconv_t cd)
|
|
internal_function;
|
|
|
|
/* Transform at most *INBYTESLEFT bytes from buffer starting at *INBUF
|
|
according to rules described by CD and place up to *OUTBYTESLEFT
|
|
bytes in buffer starting at *OUTBUF. Return number of non-identical
|
|
conversions in *IRREVERSIBLE if this pointer is not null. */
|
|
extern int __gconv (__gconv_t cd, const unsigned char **inbuf,
|
|
const unsigned char *inbufend, unsigned char **outbuf,
|
|
unsigned char *outbufend, size_t *irreversible)
|
|
internal_function;
|
|
|
|
/* Return in *HANDLE a pointer to an array with *NSTEPS elements describing
|
|
the single steps necessary for transformation from FROMSET to TOSET. */
|
|
extern int __gconv_find_transform (const char *toset, const char *fromset,
|
|
struct __gconv_step **handle,
|
|
size_t *nsteps, int flags)
|
|
internal_function;
|
|
|
|
/* Search for transformation in cache data. */
|
|
extern int __gconv_lookup_cache (const char *toset, const char *fromset,
|
|
struct __gconv_step **handle, size_t *nsteps,
|
|
int flags)
|
|
internal_function;
|
|
|
|
/* Compare the two name for whether they are after alias expansion the
|
|
same. This function uses the cache and fails if none is
|
|
loaded. */
|
|
extern int __gconv_compare_alias_cache (const char *name1, const char *name2,
|
|
int *result) internal_function;
|
|
|
|
/* Free data associated with a step's structure. */
|
|
extern void __gconv_release_step (struct __gconv_step *step)
|
|
internal_function;
|
|
|
|
/* Read all the configuration data and cache it. */
|
|
extern void __gconv_read_conf (void) attribute_hidden;
|
|
|
|
/* Try to read module cache file. */
|
|
extern int __gconv_load_cache (void) internal_function;
|
|
|
|
/* Determine the directories we are looking in. */
|
|
extern void __gconv_get_path (void) internal_function;
|
|
|
|
/* Comparison function to search alias. */
|
|
extern int __gconv_alias_compare (const void *p1, const void *p2)
|
|
attribute_hidden;
|
|
|
|
/* Clear reference to transformation step implementations which might
|
|
cause the code to be unloaded. */
|
|
extern int __gconv_close_transform (struct __gconv_step *steps,
|
|
size_t nsteps)
|
|
internal_function;
|
|
|
|
/* Free all resources allocated for the transformation record when
|
|
using the cache. */
|
|
extern void __gconv_release_cache (struct __gconv_step *steps, size_t nsteps)
|
|
internal_function;
|
|
|
|
/* Load shared object named by NAME. If already loaded increment reference
|
|
count. */
|
|
extern struct __gconv_loaded_object *__gconv_find_shlib (const char *name)
|
|
internal_function;
|
|
|
|
/* Release shared object. If no further reference is available unload
|
|
the object. */
|
|
extern void __gconv_release_shlib (struct __gconv_loaded_object *handle)
|
|
internal_function;
|
|
|
|
/* Fill STEP with information about builtin module with NAME. */
|
|
extern void __gconv_get_builtin_trans (const char *name,
|
|
struct __gconv_step *step)
|
|
internal_function;
|
|
|
|
/* Try to load transliteration step module. */
|
|
extern int __gconv_translit_find (struct trans_struct *trans)
|
|
internal_function;
|
|
|
|
/* Transliteration using the locale's data. */
|
|
extern int __gconv_transliterate (struct __gconv_step *step,
|
|
struct __gconv_step_data *step_data,
|
|
void *trans_data,
|
|
__const unsigned char *inbufstart,
|
|
__const unsigned char **inbufp,
|
|
__const unsigned char *inbufend,
|
|
unsigned char **outbufstart,
|
|
size_t *irreversible) attribute_hidden;
|
|
|
|
|
|
/* Builtin transformations. */
|
|
#ifdef _LIBC
|
|
# define __BUILTIN_TRANS(Name) \
|
|
extern int Name (struct __gconv_step *step, \
|
|
struct __gconv_step_data *data, \
|
|
const unsigned char **inbuf, \
|
|
const unsigned char *inbufend, \
|
|
unsigned char **outbufstart, size_t *irreversible, \
|
|
int do_flush, int consume_incomplete)
|
|
|
|
__BUILTIN_TRANS (__gconv_transform_ascii_internal);
|
|
__BUILTIN_TRANS (__gconv_transform_internal_ascii);
|
|
__BUILTIN_TRANS (__gconv_transform_utf8_internal);
|
|
__BUILTIN_TRANS (__gconv_transform_internal_utf8);
|
|
__BUILTIN_TRANS (__gconv_transform_ucs2_internal);
|
|
__BUILTIN_TRANS (__gconv_transform_internal_ucs2);
|
|
__BUILTIN_TRANS (__gconv_transform_ucs2reverse_internal);
|
|
__BUILTIN_TRANS (__gconv_transform_internal_ucs2reverse);
|
|
__BUILTIN_TRANS (__gconv_transform_internal_ucs4);
|
|
__BUILTIN_TRANS (__gconv_transform_ucs4_internal);
|
|
__BUILTIN_TRANS (__gconv_transform_internal_ucs4le);
|
|
__BUILTIN_TRANS (__gconv_transform_ucs4le_internal);
|
|
__BUILTIN_TRANS (__gconv_transform_internal_utf16);
|
|
__BUILTIN_TRANS (__gconv_transform_utf16_internal);
|
|
# undef __BUITLIN_TRANS
|
|
|
|
#endif
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* gconv_int.h */
|