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/* Copyright (C) 1997, 1998 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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"
#include <regex.h>
__BEGIN_DECLS
/* Structure for alias definition. Simply to strings. */
struct gconv_alias
{
const char *fromname;
const char *toname;
};
/* Default size of intermediate buffers. */
#define GCONV_DEFAULT_BUFSIZE 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. */
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. */
struct link_map *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_pattern;
const char *from_constpfx;
size_t from_constpfx_len;
const regex_t *from_regex;
const char *to_string;
int cost;
const char *module_name;
};
/* 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;
/* Return in *HANDLE decriptor for transformation from FROMSET to TOSET. */
extern int __gconv_open (const char *__toset, const char *__fromset,
gconv_t *__handle)
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 written
characters in *CONVERTED if this pointer is not null. */
extern int __gconv (gconv_t __cd, const char **__inbuf, size_t *__inbytesleft,
char **__outbuf, size_t *__outbytesleft,
size_t *__converted)
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)
internal_function;
/* Read all the configuration data and cache it. */
extern void __gconv_read_conf (void)
internal_function;
/* Comparison function to search alias. */
extern int __gconv_alias_compare (const void *__p1, const void *__p2);
/* 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;
/* 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;
/* Find function named NAME in shared object referenced by HANDLE. */
void *__gconv_find_func (void *handle, const char *name)
internal_function;
/* Release shared object. If no further reference is available unload
the object. */
extern int __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;
/* Builtin transformations. */
#ifdef _LIBC
# define __BUILTIN_TRANS(Name) \
extern int Name (struct gconv_step *__step, struct gconv_step_data *__data, \
const char *__inbuf, size_t *__inlen, size_t *__written, \
int __do_flush)
__BUILTIN_TRANS (__gconv_transform_dummy);
__BUILTIN_TRANS (__gconv_transform_ascii_ucs4);
__BUILTIN_TRANS (__gconv_transform_ucs4_ascii);
__BUILTIN_TRANS (__gconv_transform_ucs4_utf8);
__BUILTIN_TRANS (__gconv_transform_utf8_ucs4);
__BUILTIN_TRANS (__gconv_transform_ucs2_ucs4);
__BUILTIN_TRANS (__gconv_transform_ucs4_ucs2);
# undef __BUITLIN_TRANS
#endif
__END_DECLS
#endif /* gconv_int.h */
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