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/* Copyright (C) 1997, 1998, 1999, 2000 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;
};
/* 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. */
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_pattern;
const char *from_constpfx;
size_t from_constpfx_len;
const regex_t *from_regex;
regex_t from_regex_mem;
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 *matching;/* Next node with more specific prefix. */
struct gconv_module *right; /* Prefix larger. */
};
/* 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;
/* The gconv functions expects the name to be in upper case and complete,
including the trailing slashes if necessary. */
#define norm_add_slashes(str) \
({ \
const char *cp = (str); \
char *result; \
char *tmp; \
size_t cnt = 0; \
\
while (*cp != '\0') \
if (*cp++ == '/') \
++cnt; \
\
tmp = result = alloca (cp - (str) + 3); \
cp = (str); \
while (*cp != '\0') \
*tmp++ = _toupper (*cp++); \
if (cnt < 2) \
{ \
*tmp++ = '/'; \
if (cnt < 1) \
*tmp++ = '/'; \
} \
*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;
/* Read all the configuration data and cache it. */
extern void __gconv_read_conf (void);
/* 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;
/* 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 unsigned char **__inbuf, \
const unsigned char *__inbufend, size_t *__written, \
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 */
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