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/* Character set conversion with error handling.
Copyright (C) 2001-2007, 2009-2011 Free Software Foundation, Inc.
Written by Bruno Haible and Simon Josefsson.
This program 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 3 of the License, or
(at your option) any later version.
This program 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 <http://www.gnu.org/licenses/>. */
#ifndef _STRICONVEH_H
#define _STRICONVEH_H
#include <stddef.h>
#if HAVE_ICONV
#include <iconv.h>
#endif
#include "iconveh.h"
#ifdef __cplusplus
extern "C" {
#endif
#if HAVE_ICONV
/* A conversion descriptor for use by the iconveh functions. */
typedef struct
{
/* Conversion descriptor from FROM_CODESET to TO_CODESET, or (iconv_t)(-1)
if the system does not support a direct conversion from FROM_CODESET to
TO_CODESET. */
iconv_t cd;
/* Conversion descriptor from FROM_CODESET to UTF-8 (or (iconv_t)(-1) if
FROM_CODESET is UTF-8). */
iconv_t cd1;
/* Conversion descriptor from UTF-8 to TO_CODESET (or (iconv_t)(-1) if
TO_CODESET is UTF-8). */
iconv_t cd2;
}
iconveh_t;
/* Open a conversion descriptor for use by the iconveh functions.
If successful, fills *CDP and returns 0. Upon failure, return -1 with errno
set. */
extern int
iconveh_open (const char *to_codeset, const char *from_codeset,
iconveh_t *cdp);
/* Close a conversion descriptor created by iconveh_open().
Return value: 0 if successful, otherwise -1 and errno set. */
extern int
iconveh_close (const iconveh_t *cd);
/* Convert an entire string from one encoding to another, using iconv.
The original string is at [SRC,...,SRC+SRCLEN-1].
CD points to the conversion descriptor from FROMCODE to TOCODE, created by
the function iconveh_open().
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).
*RESULTP and *LENGTH should initially be a scratch buffer and its size,
or *RESULTP can initially be NULL.
May erase the contents of the memory at *RESULTP.
Return value: 0 if successful, otherwise -1 and errno set.
If successful: The resulting string is stored in *RESULTP and its length
in *LENGTHP. *RESULTP is set to a freshly allocated memory block, or is
unchanged if no dynamic memory allocation was necessary. */
extern int
mem_cd_iconveh (const char *src, size_t srclen,
const iconveh_t *cd,
enum iconv_ilseq_handler handler,
size_t *offsets,
char **resultp, size_t *lengthp);
/* Convert an entire string from one encoding to another, using iconv.
The original string is the NUL-terminated string starting at SRC.
CD points to the conversion descriptor from FROMCODE to TOCODE, created by
the function iconveh_open().
Both the "from" and the "to" encoding must use a single NUL byte at the end
of the string (i.e. not UCS-2, UCS-4, UTF-16, UTF-32).
Allocate a malloced memory block for the result.
Return value: the freshly allocated resulting NUL-terminated string if
successful, otherwise NULL and errno set. */
extern char *
str_cd_iconveh (const char *src,
const iconveh_t *cd,
enum iconv_ilseq_handler handler);
#endif
/* Convert an entire string from one encoding to another, using iconv.
The original string is at [SRC,...,SRC+SRCLEN-1].
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).
*RESULTP and *LENGTH should initially be a scratch buffer and its size,
or *RESULTP can initially be NULL.
May erase the contents of the memory at *RESULTP.
Return value: 0 if successful, otherwise -1 and errno set.
If successful: The resulting string is stored in *RESULTP and its length
in *LENGTHP. *RESULTP is set to a freshly allocated memory block, or is
unchanged if no dynamic memory allocation was necessary. */
extern int
mem_iconveh (const char *src, size_t srclen,
const char *from_codeset, const char *to_codeset,
enum iconv_ilseq_handler handler,
size_t *offsets,
char **resultp, size_t *lengthp);
/* Convert an entire string from one encoding to another, using iconv.
The original string is the NUL-terminated string starting at SRC.
Both the "from" and the "to" encoding must use a single NUL byte at the
end of the string (i.e. not UCS-2, UCS-4, UTF-16, UTF-32).
Allocate a malloced memory block for the result.
Return value: the freshly allocated resulting NUL-terminated string if
successful, otherwise NULL and errno set. */
extern char *
str_iconveh (const char *src,
const char *from_codeset, const char *to_codeset,
enum iconv_ilseq_handler handler);
#ifdef __cplusplus
}
#endif
#endif /* _STRICONVEH_H */
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