glibc/iconv/iconv_open.c
Ulrich Drepper 256846bb65 Update.
1998-12-29  Geoff Keating  <geoffk@ozemail.com.au>

	* sunrpc/Versions: Include _authenticate, it's defined in a user
	header (in fact, it's the whole contents of rpc/svc_auth.h).

1999-01-23  Ulrich Drepper  <drepper@cygnus.com>

	* io/ftw.c (process_entry): Initialize flag since not all gcc
	versions are smart enough to see that this is no problem.

	* elf/dl-open.c (_dl_init_paths): Check malloc result.

	* csu/Versions: Add __frame_state_for.
1999-01-23 09:43:49 +00:00

101 lines
2.5 KiB
C

/* Get descriptor for character set conversion.
Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <ctype.h>
#include <errno.h>
#include <iconv.h>
#include <stdlib.h>
#include <string.h>
#include <gconv_int.h>
static inline void
strip (char *wp, const char *s)
{
int slash_count = 0;
while (*s != '\0')
{
if (isalnum (*s) || *s == '_' || *s == '-' || *s == '.')
*wp++ = toupper (*s);
else if (*s == '/')
{
if (++slash_count == 3)
break;
*wp++ = '/';
}
++s;
}
while (slash_count++ < 2)
*wp++ = '/';
*wp = '\0';
}
static char *
upstr (char *dst, const char *str)
{
char *cp = dst;
while ((*cp++ = toupper (*str++)) != '\0')
/* nothing */;
return dst;
}
iconv_t
iconv_open (const char *tocode, const char *fromcode)
{
char *tocode_conv;
char *fromcode_conv;
size_t tocode_len;
size_t fromcode_len;
gconv_t cd;
int res;
/* Normalize the name. We remove all characters beside alpha-numeric,
'_', '-', '/', and '.'. */
tocode_len = strlen (tocode);
tocode_conv = alloca (tocode_len + 3);
strip (tocode_conv, tocode);
tocode = tocode_conv[2] == '\0' ? upstr (tocode_conv, tocode) : tocode_conv;
fromcode_len = strlen (fromcode);
fromcode_conv = alloca (fromcode_len + 3);
strip (fromcode_conv, fromcode);
fromcode = (fromcode_conv[2] == '\0'
? upstr (fromcode_conv, fromcode) : fromcode_conv);
res = __gconv_open (tocode, fromcode, &cd);
if (res != GCONV_OK)
{
/* We must set the error number according to the specs. */
if (res == GCONV_NOCONV || res == GCONV_NODB)
__set_errno (EINVAL);
return (iconv_t) -1;
}
return (iconv_t) cd;
}