mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-21 20:40:05 +00:00
777bc09586
* iconvme.c: New file. * toutf8.c: Include stringprep.h first, to make the compiler check that stringprep.h is standalone. Improve comments. Replace #include of errno.h and sys/param.h with iconvme.h. Don't define ICONV_CONST. (stringprep_convert): Rewrite to use iconvme.h.
160 lines
3.5 KiB
C
160 lines
3.5 KiB
C
/* Recode strings between character sets, using iconv.
|
|
Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
|
|
|
|
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 2.1, 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, write to the Free Software Foundation,
|
|
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
/* Get prototype. */
|
|
#include "iconvme.h"
|
|
|
|
/* Get malloc. */
|
|
#include <stdlib.h>
|
|
|
|
/* Get strcmp. */
|
|
#include <string.h>
|
|
|
|
/* Get errno. */
|
|
#include <errno.h>
|
|
|
|
#ifdef _LIBC
|
|
# define HAVE_ICONV 1
|
|
#else
|
|
/* Get strdup. */
|
|
# include "strdup.h"
|
|
#endif
|
|
|
|
#if HAVE_ICONV
|
|
/* Get iconv etc. */
|
|
# include <iconv.h>
|
|
/* Get MB_LEN_MAX. */
|
|
# include <limits.h>
|
|
#endif
|
|
|
|
/* Convert a zero-terminated string STR from the FROM_CODSET code set
|
|
to the TO_CODESET code set. The returned string is allocated using
|
|
malloc, and must be dellocated by the caller using free. On
|
|
failure, NULL is returned and errno holds the error reason. Note
|
|
that if TO_CODESET uses \0 for anything but to terminate the
|
|
string, the caller of this function may have difficulties finding
|
|
out the length of the output string. */
|
|
char *
|
|
iconv_string (const char *str, const char *from_codeset,
|
|
const char *to_codeset)
|
|
{
|
|
char *dest = NULL;
|
|
#if HAVE_ICONV
|
|
iconv_t cd;
|
|
char *outp;
|
|
char *p = (char *) str;
|
|
size_t inbytes_remaining = strlen (p);
|
|
/* Guess the maximum length the output string can have. */
|
|
size_t outbuf_size = (inbytes_remaining + 1) * MB_LEN_MAX;
|
|
size_t outbytes_remaining = outbuf_size - 1; /* -1 for NUL */
|
|
size_t err;
|
|
int have_error = 0;
|
|
#endif
|
|
|
|
if (strcmp (to_codeset, from_codeset) == 0)
|
|
return strdup (str);
|
|
|
|
#if HAVE_ICONV
|
|
cd = iconv_open (to_codeset, from_codeset);
|
|
if (cd == (iconv_t) -1)
|
|
return NULL;
|
|
|
|
outp = dest = (char *) malloc (outbuf_size);
|
|
if (dest == NULL)
|
|
goto out;
|
|
|
|
again:
|
|
err = iconv (cd, &p, &inbytes_remaining, &outp, &outbytes_remaining);
|
|
|
|
if (err == (size_t) - 1)
|
|
{
|
|
switch (errno)
|
|
{
|
|
case EINVAL:
|
|
/* Incomplete text, do not report an error */
|
|
break;
|
|
|
|
case E2BIG:
|
|
{
|
|
size_t used = outp - dest;
|
|
size_t newsize = outbuf_size * 2;
|
|
char *newdest;
|
|
|
|
if (newsize <= outbuf_size)
|
|
{
|
|
errno = ENOMEM;
|
|
have_error = 1;
|
|
goto out;
|
|
}
|
|
newdest = (char *) realloc (dest, newsize);
|
|
if (newdest == NULL)
|
|
{
|
|
have_error = 1;
|
|
goto out;
|
|
}
|
|
dest = newdest;
|
|
outbuf_size = newsize;
|
|
|
|
outp = dest + used;
|
|
outbytes_remaining = outbuf_size - used - 1; /* -1 for NUL */
|
|
|
|
goto again;
|
|
}
|
|
break;
|
|
|
|
case EILSEQ:
|
|
have_error = 1;
|
|
break;
|
|
|
|
default:
|
|
have_error = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
*outp = '\0';
|
|
|
|
out:
|
|
{
|
|
int save_errno = errno;
|
|
|
|
if (iconv_close (cd) < 0 && !have_error)
|
|
{
|
|
/* If we didn't have a real error before, make sure we restore
|
|
the iconv_close error below. */
|
|
save_errno = errno;
|
|
have_error = 1;
|
|
}
|
|
|
|
if (have_error && dest)
|
|
{
|
|
free (dest);
|
|
dest = NULL;
|
|
errno = save_errno;
|
|
}
|
|
}
|
|
#else
|
|
errno = ENOSYS;
|
|
#endif
|
|
|
|
return dest;
|
|
}
|