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/* Conversions between Unicode and legacy encodings.
Copyright (C) 2002, 2005, 2007, 2009-2024 Free Software Foundation, Inc.
This file 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.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#ifndef _UNICONV_H
#define _UNICONV_H
/* Get size_t. */
#include <stddef.h>
#include "unitypes.h"
/* Get enum iconv_ilseq_handler. */
#include <unistring/iconveh.h>
/* Get locale_charset() declaration. */
#include <unistring/localcharset.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Converts an entire string, possibly including NUL bytes, from one encoding
to a Unicode encoding.
Converts a memory region given in encoding FROMCODE. FROMCODE is as for
iconv_open(3).
The input is in the memory region between SRC (inclusive) and SRC + SRCLEN
(exclusive).
If OFFSETS is not NULL, it should point to an array of SRCLEN integers; this
array is filled with offsets into the result, i.e. the character starting
at SRC[i] corresponds to the character starting at (*RESULTP)[OFFSETS[i]],
and other offsets are set to (size_t)(-1).
RESULTBUF and *LENGTHP should initially be a scratch buffer and its size,
or *RESULTBUF can be NULL.
May erase the contents of the memory at RESULTBUF.
If successful: The resulting Unicode string (non-NULL) is returned and its
length stored in *LENGTHP. The resulting string is RESULTBUF if no dynamic
memory allocation was necessary, or a freshly allocated memory block
otherwise.
In case of error: NULL is returned and errno is set. Particular errno
values: EINVAL, EILSEQ, ENOMEM. */
extern uint8_t *
u8_conv_from_encoding (const char *fromcode,
enum iconv_ilseq_handler handler,
const char *src, size_t srclen,
size_t *offsets,
uint8_t *resultbuf, size_t *lengthp);
extern uint16_t *
u16_conv_from_encoding (const char *fromcode,
enum iconv_ilseq_handler handler,
const char *src, size_t srclen,
size_t *offsets,
uint16_t *resultbuf, size_t *lengthp);
extern uint32_t *
u32_conv_from_encoding (const char *fromcode,
enum iconv_ilseq_handler handler,
const char *src, size_t srclen,
size_t *offsets,
uint32_t *resultbuf, size_t *lengthp);
/* Converts an entire Unicode string, possibly including NUL units, from a
Unicode encoding to a given encoding.
Converts a memory region to encoding TOCODE. TOCODE is as for
iconv_open(3).
The input is in the memory region between SRC (inclusive) and SRC + SRCLEN
(exclusive).
If OFFSETS is not NULL, it should point to an array of SRCLEN integers; this
array is filled with offsets into the result, i.e. the character starting
at SRC[i] corresponds to the character starting at (*RESULTP)[OFFSETS[i]],
and other offsets are set to (size_t)(-1).
RESULTBUF and *LENGTHP should initially be a scratch buffer and its size,
or RESULTBUF can be NULL.
May erase the contents of the memory at RESULTBUF.
If successful: The resulting string (non-NULL) is returned and its length
stored in *LENGTHP. The resulting string is RESULTBUF if no dynamic memory
allocation was necessary, or a freshly allocated memory block otherwise.
In case of error: NULL is returned and errno is set. Particular errno
values: EINVAL, EILSEQ, ENOMEM. */
extern char *
u8_conv_to_encoding (const char *tocode,
enum iconv_ilseq_handler handler,
const uint8_t *src, size_t srclen,
size_t *offsets,
char *_UC_RESTRICT resultbuf, size_t *lengthp);
extern char *
u16_conv_to_encoding (const char *tocode,
enum iconv_ilseq_handler handler,
const uint16_t *src, size_t srclen,
size_t *offsets,
char *_UC_RESTRICT resultbuf, size_t *lengthp);
extern char *
u32_conv_to_encoding (const char *tocode,
enum iconv_ilseq_handler handler,
const uint32_t *src, size_t srclen,
size_t *offsets,
char *_UC_RESTRICT resultbuf, size_t *lengthp);
/* Converts a NUL terminated string from a given encoding.
The result is malloc allocated, or NULL (with errno set) in case of error.
Particular errno values: EILSEQ, ENOMEM. */
extern uint8_t *
u8_strconv_from_encoding (const char *string,
const char *fromcode,
enum iconv_ilseq_handler handler);
extern uint16_t *
u16_strconv_from_encoding (const char *string,
const char *fromcode,
enum iconv_ilseq_handler handler);
extern uint32_t *
u32_strconv_from_encoding (const char *string,
const char *fromcode,
enum iconv_ilseq_handler handler);
/* Converts a NUL terminated string to a given encoding.
The result is malloc allocated, or NULL (with errno set) in case of error.
Particular errno values: EILSEQ, ENOMEM. */
extern char *
u8_strconv_to_encoding (const uint8_t *string,
const char *tocode,
enum iconv_ilseq_handler handler);
extern char *
u16_strconv_to_encoding (const uint16_t *string,
const char *tocode,
enum iconv_ilseq_handler handler);
extern char *
u32_strconv_to_encoding (const uint32_t *string,
const char *tocode,
enum iconv_ilseq_handler handler);
/* Converts a NUL terminated string from the locale encoding.
The result is malloc allocated, or NULL (with errno set) in case of error.
Particular errno values: ENOMEM. */
extern uint8_t *
u8_strconv_from_locale (const char *string);
extern uint16_t *
u16_strconv_from_locale (const char *string);
extern uint32_t *
u32_strconv_from_locale (const char *string);
/* Converts a NUL terminated string to the locale encoding.
The result is malloc allocated, or NULL (with errno set) in case of error.
Particular errno values: ENOMEM. */
extern char *
u8_strconv_to_locale (const uint8_t *string);
extern char *
u16_strconv_to_locale (const uint16_t *string);
extern char *
u32_strconv_to_locale (const uint32_t *string);
#ifdef __cplusplus
}
#endif
#endif /* _UNICONV_H */
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