/* Copyright (C) 1997-2018 Free Software Foundation, Inc.

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This file is part of the GNU C Library.

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The GNU C Library is free software; you can redistribute it and/or

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modify it under the terms of the GNU Lesser General Public

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License as published by the Free Software Foundation; either

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version 2.1 of the License, or (at your option) any later version.

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The GNU C Library is distributed in the hope that it will be useful,

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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Lesser General Public License for more details.

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You should have received a copy of the GNU Lesser General Public

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License along with the GNU C Library; if not, see

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<http://www.gnu.org/licenses/>. */

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/* This header provides no interface for a user to the internals of

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the gconv implementation in the libc. Therefore there is no use

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for these definitions beside for writing additional gconv modules. */

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#ifndef _GCONV_H

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#define _GCONV_H 1

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#include <features.h>

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#include <bits/types/__mbstate_t.h>

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#include <bits/types/wint_t.h>

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#define __need_size_t

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#define __need_wchar_t

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#include <stddef.h>

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/* ISO 10646 value used to signal invalid value. */

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#define __UNKNOWN_10646_CHAR ((wchar_t) 0xfffd)

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/* Error codes for gconv functions. */

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enum

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{

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__GCONV_OK = 0,

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__GCONV_NOCONV,

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__GCONV_NODB,

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__GCONV_NOMEM,

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__GCONV_EMPTY_INPUT,

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__GCONV_FULL_OUTPUT,

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__GCONV_ILLEGAL_INPUT,

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__GCONV_INCOMPLETE_INPUT,

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__GCONV_ILLEGAL_DESCRIPTOR,

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__GCONV_INTERNAL_ERROR

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};

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/* Flags the `__gconv_open' function can set. */

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enum

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{

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__GCONV_IS_LAST = 0x0001,

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__GCONV_IGNORE_ERRORS = 0x0002,

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__GCONV_SWAP = 0x0004,

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__GCONV_TRANSLIT = 0x0008

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};

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/* Forward declarations. */

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struct __gconv_step;

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struct __gconv_step_data;

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struct __gconv_loaded_object;

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/* Type of a conversion function. */

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typedef int (*__gconv_fct) (struct __gconv_step *, struct __gconv_step_data *,

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const unsigned char **, const unsigned char *,

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unsigned char **, size_t *, int, int);

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/* Type of a specialized conversion function for a single byte to INTERNAL. */

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typedef wint_t (*__gconv_btowc_fct) (struct __gconv_step *, unsigned char);

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/* Constructor and destructor for local data for conversion step. */

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typedef int (*__gconv_init_fct) (struct __gconv_step *);

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typedef void (*__gconv_end_fct) (struct __gconv_step *);

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/* Description of a conversion step. */

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struct __gconv_step

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{

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struct __gconv_loaded_object *__shlib_handle;

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const char *__modname;

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int __counter;

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char *__from_name;

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char *__to_name;

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__gconv_fct __fct;

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__gconv_btowc_fct __btowc_fct;

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__gconv_init_fct __init_fct;

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__gconv_end_fct __end_fct;

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/* Information about the number of bytes needed or produced in this

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step. This helps optimizing the buffer sizes. */

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int __min_needed_from;

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int __max_needed_from;

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int __min_needed_to;

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int __max_needed_to;

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/* Flag whether this is a stateful encoding or not. */

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int __stateful;

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void *__data; /* Pointer to step-local data. */

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};

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/* Additional data for steps in use of conversion descriptor. This is

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allocated by the `init' function. */

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struct __gconv_step_data

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{

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unsigned char *__outbuf; /* Output buffer for this step. */

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unsigned char *__outbufend; /* Address of first byte after the output

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buffer. */

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/* Is this the last module in the chain. */

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int __flags;

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/* Counter for number of invocations of the module function for this

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descriptor. */

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int __invocation_counter;

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/* Flag whether this is an internal use of the module (in the mb*towc*

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and wc*tomb* functions) or regular with iconv(3). */

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int __internal_use;

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__mbstate_t *__statep;

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__mbstate_t __state; /* This element must not be used directly by

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any module; always use STATEP! */

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};

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/* Combine conversion step description with data. */

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typedef struct __gconv_info

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{

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size_t __nsteps;

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struct __gconv_step *__steps;

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__extension__ struct __gconv_step_data __data[0];

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} *__gconv_t;

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/* Transliteration using the locale's data. */

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extern int __gconv_transliterate (struct __gconv_step *step,

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struct __gconv_step_data *step_data,

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const unsigned char *inbufstart,

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const unsigned char **inbufp,

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const unsigned char *inbufend,

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unsigned char **outbufstart,

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size_t *irreversible);

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#endif /* gconv.h */

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