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/* Copyright (C) 1997 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_H
#define _GCONV_H 1
#include <features.h>
#include <sys/types.h>
#include <regex.h>
/* Error codes for gconv functions. */
enum
{
GCONV_OK = 0,
GCONV_NOCONV,
GCONV_NODB,
GCONV_NOMEM,
GCONV_EMPTY_INPUT,
GCONV_FULL_OUTPUT,
GCONV_ILLEGAL_INPUT,
GCONV_ILLEGAL_DESCRIPTOR,
GCONV_INTERNAL_ERROR
};
/* 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
/* Forward declarations. */
struct gconv_step;
struct gconv_step_data;
/* Type of a conversion function. */
typedef int (*gconv_fct) __P ((struct gconv_step *,
struct gconv_step_data *,
__const char *, size_t *, size_t *, int));
/* Constructor and destructor for local data for conversion step. */
typedef int (*gconv_init_fct) __P ((struct gconv_step *,
struct gconv_step_data *));
typedef void (*gconv_end_fct) __P ((struct gconv_step_data *));
/* Description of a conversion step. */
struct gconv_step
{
void *shlib_handle;
__const char *from_name;
__const char *to_name;
gconv_fct fct;
gconv_init_fct init_fct;
gconv_end_fct end_fct;
};
/* Additional data for steps in use of conversion descriptor. This is
allocated by the `init' function. */
struct gconv_step_data
{
char *outbuf; /* Output buffer for this step. */
size_t outbufavail; /* Bytes already available in output buffer. */
size_t outbufsize; /* Size of output buffer. */
int is_last;
void *data; /* Pointer to step-local data. */
};
/* Combine conversion step description with data. */
typedef struct gconv_info
{
size_t nsteps;
struct gconv_step *steps;
struct gconv_step_data *data;
} *gconv_t;
/* 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 __P ((__const char *__toset, __const char *__fromset,
gconv_t *__handle));
/* Free resources associated with transformation descriptor CD. */
extern int __gconv_close __P ((gconv_t cd));
/* 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 __P ((gconv_t __cd,
__const char **__inbuf, size_t *__inbytesleft,
char **__outbuf, size_t *__outbytesleft,
size_t *__converted));
/* 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 __P ((__const char *__toset,
__const char *__fromset,
struct gconv_step **__handle,
size_t *__nsteps));
/* Read all the configuration data and cache it. */
extern void __gconv_read_conf __P ((void));
/* Comparison function to search alias. */
extern int __gconv_alias_compare __P ((__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 __P ((struct gconv_step *__steps,
size_t __nsteps));
/* Find in the shared object associated with HANDLE for a function with
name NAME. Return function pointer or NULL. */
extern void *__gconv_find_func __P ((void *__handle, __const char *__name));
/* Load shared object named by NAME. If already loaded increment reference
count. */
extern void *__gconv_find_shlib __P ((__const char *__name));
/* Release shared object. If no further reference is available unload
the object. */
extern int __gconv_release_shlib __P ((void *__handle));
/* Fill STEP with information about builtin module with NAME. */
extern void __gconv_get_builtin_trans __P ((__const char *__name,
struct gconv_step *__step));
/* Builtin transformations. */
#ifdef _LIBC
# define __BUILTIN_TRANS(Name) \
extern int Name __P ((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_ucs4_utf8);
__BUILTIN_TRANS (__gconv_transform_utf8_ucs4);
# undef __BUITLIN_TRANS
extern int __gconv_transform_init_rstate __P ((struct gconv_step *__step,
struct gconv_step_data *__data));
extern void __gconv_transform_end_rstate __P ((struct gconv_step_data *__data));
#endif
#endif /* gconv.h */
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