libc
/* $Id$ */
/* Copyright (c) 2008-2016 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS System libc */
/* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
#include "sys/types.h"
#include "string.h"
#include "strings.h"
#include "errno.h"
#include "iconv.h"
/* types */
typedef enum _iconv_code
{
IC_UNKNOWN = -1,
IC_ISO_8859_1,
IC_ISO_8859_15,
IC_UTF_8
} iconv_code;
/* constants */
static struct
{
iconv_code code;
char const * name;
} _iconv_names[] =
{
{ IC_ISO_8859_1, "iso-8859-1" },
{ IC_ISO_8859_15, "iso-8859-15" },
{ IC_UTF_8, "UTF-8" },
{ IC_UTF_8, "UTF8" }
};
/* functions */
/* iconv_open */
static iconv_code _open_code(char const * code);
iconv_t iconv_open(const char * tocode, const char * fromcode)
{
iconv_t cd;
iconv_code code;
if((code = _open_code(tocode)) == IC_UNKNOWN)
{
errno = EINVAL;
return (iconv_t)-1;
}
cd = code;
if((code = _open_code(fromcode)) == IC_UNKNOWN)
{
errno = EINVAL;
return (iconv_t)-1;
}
cd |= code << 16;
return cd;
}
static iconv_code _open_code(char const * code)
{
size_t i;
for(i = 0; i < sizeof(_iconv_names) / sizeof(*_iconv_names); i++)
if(strcasecmp(_iconv_names[i].name, code) == 0)
return _iconv_names[i].code;
return IC_UNKNOWN;
}
/* iconv */
size_t iconv(iconv_t cd, const char ** inbuf, size_t * inbytesleft,
char ** outbuf, size_t * outbytesleft)
{
if((cd & 0xffff) == ((cd >> 16) & 0xffff))
{
/* no conversion is required */
if(*inbytesleft > *outbytesleft)
{
/* the conversion will not fit */
errno = E2BIG;
return (size_t)-1;
}
memcpy(*outbuf, *inbuf, *inbytesleft);
(*inbuf) += *inbytesleft;
(*outbuf) += *inbytesleft;
(*outbytesleft) -= *inbytesleft;
*inbytesleft = 0;
return 0;
}
errno = ENOSYS;
return (size_t)-1;
}
/* iconv_close */
int iconv_close(iconv_t cd)
{
(void) cd;
return 0;
}