newlib-cygwin/newlib/libc/iconv/lib/iconvnls.c

363 lines
11 KiB
C

/*
* Copyright (c) 2003-2004, Artem B. Bityuckiy
*
* 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 AUTHOR 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 AUTHOR 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 <_ansi.h>
#include <reent.h>
#include <newlib.h>
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <sys/iconvnls.h>
#ifdef _MB_CAPABLE
#include <wchar.h>
#include <iconv.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include "local.h"
#include "conv.h"
#include "ucsconv.h"
#include "iconvnls.h"
#endif
/*
* _iconv_nls_construct_filename -- constructs full file name.
*
* PARAMETERS:
* struct _reent *rptr - reent structure of current thread/process.
* _CONST char *file - the name of file.
* _CONST char *dir - the name of subdirectory;
* _CONST char *ext - file extension.
*
* DESCRIPTION:
* Function constructs patch to icionv-related file.
* 'file' shouldn't be NULL. Doesn't use extension if 'ext' is NULL.
*
* RETURN:
* The pointer to file name if success, In case of error returns NULL
* and sets current thread's/process's errno.
*/
_CONST char *
_DEFUN(_iconv_nls_construct_filename, (rptr, file, ext),
struct _reent *rptr _AND
_CONST char *file _AND
_CONST char *dir _AND
_CONST char *ext)
{
int len1, len2, len3;
char *path;
char *p;
int dirlen = strlen (dir);
if ((path = _getenv_r (rptr, NLS_ENVVAR_NAME)) == NULL || *path == '\0')
path = ICONV_DEFAULT_NLSPATH;
len1 = strlen (path);
len2 = strlen (file);
len3 = strlen (ext);
if ((p = _malloc_r (rptr, len1 + dirlen + len2 + len3 + 3)) == NULL)
return (_CONST char *)NULL;
memcpy (p, path, len1);
if (p[len1 - 1] != '/')
p[len1++] = '/';
memcpy (p + len1, dir, dirlen);
len1 += dirlen;
p[len1++] = '/';
memcpy (p + len1, file, len2);
len1 += len2;
if (ext != NULL)
{
memcpy (p + len1, ext, len3);
len1 += len3;
}
p[len1] = '\0';
return (_CONST char *)p;
}
#ifdef _MB_CAPABLE
/*
* _iconv_nls_get_mb_cur_max -- return encoding's maximum length
* of a multi-byte character.
*
* PARAMETERS:
* iconv_t cd - opened iconv conversion descriptor;
* int direction - "from encoding" or "to encoding" direction.
*
* DESCRIPTION:
* Return maximum length of a multi-byte character in one of 'cd's
* encoding. Return "from" encoding's value if 'direction' is 0 and
* "to" encoding's value if 'direction' isn't 0.
*/
int
_DEFUN(_iconv_nls_get_mb_cur_max, (cd, direction),
iconv_t cd _AND
int direction)
{
iconv_conversion_t *ic = (iconv_conversion_t *)cd;
return ic->handlers->get_mb_cur_max (ic->data, direction);
}
/*
* _iconv_nls_is_stateful -- is encoding stateful?
*
* PARAMETERS:
* iconv_t cd - opened iconv conversion descriptor;
* int direction - "from encoding" or "to encoding" direction.
*
* DESCRIPTION:
* Returns 0 if encoding is stateless or 1 if stateful.
* Tests "from" encoding if 'direction' is 0 and
* "to" encoding's value if 'direction' isn't 0.
*/
int
_DEFUN(_iconv_nls_is_stateful, (cd, direction),
iconv_t cd _AND
int direction)
{
iconv_conversion_t *ic = (iconv_conversion_t *)cd;
return ic->handlers->is_stateful (ic->data, direction);
}
/*
* _iconv_nls_conv - special version of iconv for NLS.
*
* PARAMETERS:
* Same as _iconv_r.
*
* DESCRIPTION:
* Function behaves as _iconv_r but:
* 1. Don't handle reset/return shift states queries
* (like iconv does when 'inbuf' == NULL, etc);
* 2. Don't save result if 'outbuf' == NULL or
* '*outbuf' == NULL;
* 3. Don't perform default conversion if there is no character
* in "to" encoding that corresponds to character from "from"
* encoding.
*
* RETURN:
* Same as _iconv_r.
*/
size_t
_DEFUN(_iconv_nls_conv, (rptr, cd, inbuf, inbytesleft, outbuf, outbytesleft),
struct _reent *rptr _AND
iconv_t cd _AND
_CONST char **inbuf _AND
size_t *inbytesleft _AND
char **outbuf _AND
size_t *outbytesleft)
{
iconv_conversion_t *ic = (iconv_conversion_t *)cd;
int flags = ICONV_FAIL_BIT;
if ((_VOID_PTR)cd == NULL || cd == (iconv_t)-1 || ic->data == NULL
|| (ic->handlers != &_iconv_null_conversion_handlers
&& ic->handlers != &_iconv_ucs_conversion_handlers))
{
__errno_r (rptr) = EBADF;
return (size_t)-1;
}
if (inbytesleft == NULL || *inbytesleft == 0)
return (size_t)0;
if (outbuf == NULL || *outbuf == NULL)
flags |= ICONV_DONT_SAVE_BIT;
if (outbytesleft == NULL || *outbytesleft == 0)
{
__errno_r (rptr) = E2BIG;
return (size_t)-1;
}
return ic->handlers->convert (rptr,
ic->data,
(_CONST unsigned char**)inbuf,
inbytesleft,
(unsigned char**)outbuf,
outbytesleft,
flags);
}
/*
* _iconv_nls_get_state -- get encoding's current shift state value.
*
* PARAMETERS:
* iconv_t cd - iconv descriptor;
* mbstate_t *ps - where to save shift state;
* int direction - "from" encoding if 0, "to" encoding if 1.
*
* DESCRIPTION:
* Save encoding's current shift state to 'ps'. Save "from" encoding's
* shift state if 'direction' is 0 and "to" encodings's shift state
* if 'direction' isn't 0.
*/
_VOID
_DEFUN(_iconv_nls_get_state, (cd, ps, direction),
iconv_t cd _AND
mbstate_t *ps _AND
int direction)
{
iconv_conversion_t *ic = (iconv_conversion_t *)cd;
ic->handlers->get_state (ic->data, ps, direction);
return;
}
/*
* _iconv_nls_set_state -- set encoding's current shift state value.
*
* PARAMETERS:
* iconv_t cd - iconv descriptor;
* mbstate_t *ps - where to save shift state.
* int direction - "from" encoding if 0, "to" encoding if 1.
*
* DESCRIPTION:
* Set encoding's current shift state.
*
* RETURN:
* 0 if success, -1 if failure.
*/
int
_DEFUN(_iconv_nls_set_state, (cd, ps, direction),
iconv_t cd _AND
mbstate_t *ps _AND
int direction)
{
iconv_conversion_t *ic = (iconv_conversion_t *)cd;
return ic->handlers->set_state (ic->data, ps, direction);
}
/* Same as iconv_open() but don't perform name resolving */
static iconv_t
_DEFUN(iconv_open1, (rptr, to, from),
struct _reent *rptr _AND
_CONST char *to _AND
_CONST char *from)
{
iconv_conversion_t *ic;
if (to == NULL || from == NULL || *to == '\0' || *from == '\0')
return (iconv_t)-1;
ic = (iconv_conversion_t *)_malloc_r (rptr, sizeof (iconv_conversion_t));
if (ic == NULL)
return (iconv_t)-1;
/* Select which conversion type to use */
if (strcmp (from, to) == 0)
{
/* Use null conversion */
ic->handlers = &_iconv_null_conversion_handlers;
ic->data = ic->handlers->open (rptr, to, from);
}
else
{
/* Use UCS-based conversion */
ic->handlers = &_iconv_ucs_conversion_handlers;
ic->data = ic->handlers->open (rptr, to, from);
}
if (ic->data == NULL)
{
_free_r (rptr, (_VOID_PTR)ic);
return (iconv_t)-1;
}
return (_VOID_PTR)ic;
}
/*
* _iconv_nls_open - open iconv descriptors for NLS.
*
* PARAMETERS:
* struct _reent *rptr - process's reent structure;
* _CONST char *encoding - encoding name;
* iconv_t *tomb - wchar -> encoding iconv descriptor pointer;
* iconv_t *towc - encoding -> wchar iconv descriptor pointer;
* int flag - perform encoding name resolving flag.
*
* DESCRIPTION:
* Opens two iconv descriptors for 'encoding' -> wchar and
* wchar -> 'encoding' iconv conversions. Function is used when locale or
* wide-oriented stream is opened. If 'flag' is 0, don't perform encoding
* name resolving ('encoding' must not be alias in this case).
*
* RETURN:
* If successful - return 0, else set errno and return -1.
*/
int
_DEFUN(_iconv_nls_open, (rptr, encoding, towc, tomb),
struct _reent *rptr _AND
_CONST char *encoding _AND
iconv_t *tomb _AND
iconv_t *towc _AND
int flag)
{
_CONST char *wchar_encoding;
if (sizeof (wchar_t) > 2 && WCHAR_MAX > 0xFFFF)
wchar_encoding = "ucs_4_internal";
else if (sizeof (wchar_t) > 1 && WCHAR_MAX > 0xFF)
wchar_encoding = "ucs_2_internal";
else
wchar_encoding = ""; /* This shuldn't happen */
if (flag)
{
if ((*towc = _iconv_open_r (rptr, wchar_encoding, encoding)) == (iconv_t)-1)
return -1;
if ((*tomb = _iconv_open_r (rptr, encoding, wchar_encoding)) == (iconv_t)-1)
{
_iconv_close_r (rptr, *towc);
return -1;
}
}
else
{
if ((*towc = iconv_open1 (rptr, wchar_encoding, encoding)) == (iconv_t)-1)
return -1;
if ((*tomb = iconv_open1 (rptr, encoding, wchar_encoding)) == (iconv_t)-1)
{
_iconv_close_r (rptr, *towc);
return -1;
}
}
return 0;
}
#endif /* _MB_CAPABLE */