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/* Charset conversion.
Copyright (C) 2001-2003, 2006 Free Software Foundation, Inc.
Written by Bruno Haible <haible@clisp.cons.org>, 2001.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/* Specification. */
#include "iconvstring.h"
#include <errno.h>
#include <stdlib.h>
#if HAVE_ICONV
# include <iconv.h>
#endif
#include "xalloc.h"
#if HAVE_ICONV
/* Converts an entire string from one encoding to another, using iconv.
Return value: 0 if successful, otherwise -1 and errno set. */
int
iconv_string (iconv_t cd, const char *start, const char *end,
char **resultp, size_t *lengthp)
{
#define tmpbufsize 4096
size_t length;
char *result;
/* Avoid glibc-2.1 bug and Solaris 2.7-2.9 bug. */
# if defined _LIBICONV_VERSION \
|| !((__GLIBC__ - 0 == 2 && __GLIBC_MINOR__ - 0 <= 1) || defined __sun)
/* Set to the initial state. */
iconv (cd, NULL, NULL, NULL, NULL);
# endif
/* Determine the length we need. */
{
size_t count = 0;
char tmpbuf[tmpbufsize];
const char *inptr = start;
size_t insize = end - start;
while (insize > 0)
{
char *outptr = tmpbuf;
size_t outsize = tmpbufsize;
size_t res = iconv (cd,
(ICONV_CONST char **) &inptr, &insize,
&outptr, &outsize);
if (res == (size_t)(-1))
{
if (errno == E2BIG)
;
else if (errno == EINVAL)
break;
else
return -1;
}
# if !defined _LIBICONV_VERSION && (defined sgi || defined __sgi || defined __NetBSD__)
/* Irix iconv() inserts a NUL byte if it cannot convert.
NetBSD iconv() inserts a '?' byte if it cannot convert. */
else if (res > 0)
return -1;
# endif
count += outptr - tmpbuf;
}
/* Avoid glibc-2.1 bug and Solaris 2.7 bug. */
# if defined _LIBICONV_VERSION \
|| !((__GLIBC__ - 0 == 2 && __GLIBC_MINOR__ - 0 <= 1) || defined __sun)
{
char *outptr = tmpbuf;
size_t outsize = tmpbufsize;
size_t res = iconv (cd, NULL, NULL, &outptr, &outsize);
if (res == (size_t)(-1))
return -1;
count += outptr - tmpbuf;
}
# endif
length = count;
}
*lengthp = length;
*resultp = result = xrealloc (*resultp, length);
if (length == 0)
return 0;
/* Avoid glibc-2.1 bug and Solaris 2.7-2.9 bug. */
# if defined _LIBICONV_VERSION \
|| !((__GLIBC__ - 0 == 2 && __GLIBC_MINOR__ - 0 <= 1) || defined __sun)
/* Return to the initial state. */
iconv (cd, NULL, NULL, NULL, NULL);
# endif
/* Do the conversion for real. */
{
const char *inptr = start;
size_t insize = end - start;
char *outptr = result;
size_t outsize = length;
while (insize > 0)
{
size_t res = iconv (cd,
(ICONV_CONST char **) &inptr, &insize,
&outptr, &outsize);
if (res == (size_t)(-1))
{
if (errno == EINVAL)
break;
else
return -1;
}
# if !defined _LIBICONV_VERSION && (defined sgi || defined __sgi || defined __NetBSD__)
/* Irix iconv() inserts a NUL byte if it cannot convert.
NetBSD iconv() inserts a '?' byte if it cannot convert. */
else if (res > 0)
return -1;
# endif
}
/* Avoid glibc-2.1 bug and Solaris 2.7 bug. */
# if defined _LIBICONV_VERSION \
|| !((__GLIBC__ - 0 == 2 && __GLIBC_MINOR__ - 0 <= 1) || defined __sun)
{
size_t res = iconv (cd, NULL, NULL, &outptr, &outsize);
if (res == (size_t)(-1))
return -1;
}
# endif
if (outsize != 0)
abort ();
}
return 0;
#undef tmpbufsize
}
#endif
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