mirror of git://sourceware.org/git/glibc.git
148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
/* Copyright (C) 1997-2025 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
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, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* This header provides no interface for a user to the internals of
|
|
the gconv implementation in the libc. Therefore there is no use
|
|
for these definitions beside for writing additional gconv modules. */
|
|
|
|
#ifndef _GCONV_H
|
|
#define _GCONV_H 1
|
|
|
|
#include <features.h>
|
|
#include <bits/types/__mbstate_t.h>
|
|
#include <bits/types/wint_t.h>
|
|
|
|
#define __need_size_t
|
|
#define __need_wchar_t
|
|
#include <stddef.h>
|
|
|
|
/* ISO 10646 value used to signal invalid value. */
|
|
#define __UNKNOWN_10646_CHAR ((wchar_t) 0xfffd)
|
|
|
|
/* 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_INCOMPLETE_INPUT,
|
|
|
|
__GCONV_ILLEGAL_DESCRIPTOR,
|
|
__GCONV_INTERNAL_ERROR
|
|
};
|
|
|
|
|
|
/* Flags the `__gconv_open' function can set. */
|
|
enum
|
|
{
|
|
__GCONV_IS_LAST = 0x0001,
|
|
__GCONV_IGNORE_ERRORS = 0x0002,
|
|
__GCONV_SWAP = 0x0004,
|
|
__GCONV_TRANSLIT = 0x0008
|
|
};
|
|
|
|
|
|
/* Forward declarations. */
|
|
struct __gconv_step;
|
|
struct __gconv_step_data;
|
|
struct __gconv_loaded_object;
|
|
|
|
|
|
/* Type of a conversion function. */
|
|
typedef int (*__gconv_fct) (struct __gconv_step *, struct __gconv_step_data *,
|
|
const unsigned char **, const unsigned char *,
|
|
unsigned char **, size_t *, int, int);
|
|
|
|
/* Type of a specialized conversion function for a single byte to INTERNAL. */
|
|
typedef wint_t (*__gconv_btowc_fct) (struct __gconv_step *, unsigned char);
|
|
|
|
/* Constructor and destructor for local data for conversion step. */
|
|
typedef int (*__gconv_init_fct) (struct __gconv_step *);
|
|
typedef void (*__gconv_end_fct) (struct __gconv_step *);
|
|
|
|
|
|
/* Description of a conversion step. */
|
|
struct __gconv_step
|
|
{
|
|
struct __gconv_loaded_object *__shlib_handle;
|
|
const char *__modname;
|
|
|
|
/* For internal use by glibc. (Accesses to this member must occur
|
|
when the internal __gconv_lock mutex is acquired). */
|
|
int __counter;
|
|
|
|
char *__from_name;
|
|
char *__to_name;
|
|
|
|
__gconv_fct __fct;
|
|
__gconv_btowc_fct __btowc_fct;
|
|
__gconv_init_fct __init_fct;
|
|
__gconv_end_fct __end_fct;
|
|
|
|
/* Information about the number of bytes needed or produced in this
|
|
step. This helps optimizing the buffer sizes. */
|
|
int __min_needed_from;
|
|
int __max_needed_from;
|
|
int __min_needed_to;
|
|
int __max_needed_to;
|
|
|
|
/* Flag whether this is a stateful encoding or not. */
|
|
int __stateful;
|
|
|
|
void *__data; /* Pointer to step-local data. */
|
|
};
|
|
|
|
/* Additional data for steps in use of conversion descriptor. This is
|
|
allocated by the `init' function. */
|
|
struct __gconv_step_data
|
|
{
|
|
unsigned char *__outbuf; /* Output buffer for this step. */
|
|
unsigned char *__outbufend; /* Address of first byte after the output
|
|
buffer. */
|
|
|
|
/* Is this the last module in the chain. */
|
|
int __flags;
|
|
|
|
/* Counter for number of invocations of the module function for this
|
|
descriptor. */
|
|
int __invocation_counter;
|
|
|
|
/* Flag whether this is an internal use of the module (in the mb*towc*
|
|
and wc*tomb* functions) or regular with iconv(3). */
|
|
int __internal_use;
|
|
|
|
__mbstate_t *__statep;
|
|
__mbstate_t __state; /* This element must not be used directly by
|
|
any module; always use STATEP! */
|
|
};
|
|
|
|
|
|
/* Combine conversion step description with data. */
|
|
typedef struct __gconv_info
|
|
{
|
|
size_t __nsteps;
|
|
struct __gconv_step *__steps;
|
|
__extension__ struct __gconv_step_data __data[0];
|
|
} *__gconv_t;
|
|
|
|
#endif /* gconv.h */
|