313 lines
9.3 KiB
C
313 lines
9.3 KiB
C
/*
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* Copyright (c) 2003-2004, Artem B. Bityuckiy
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* Copyright (c) 1999,2000, Konstantin Chuguev. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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FUNCTION
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<<iconv>>, <<iconv_open>>, <<iconv_close>>---charset conversion routines
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INDEX
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iconv
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INDEX
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iconv_open
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INDEX
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iconv_close
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INDEX
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_iconv_r
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INDEX
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_iconv_open_r
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INDEX
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_iconv_close_r
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SYNOPSIS
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#include <iconv.h>
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iconv_t iconv_open (const char *<[to]>, const char *<[from]>);
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int iconv_close (iconv_t <[cd]>);
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size_t iconv (iconv_t <[cd]>, char **restrict <[inbuf]>,
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size_t *restrict <[inbytesleft]>,
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char **restrict <[outbuf]>,
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size_t *restrict <[outbytesleft]>);
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iconv_t _iconv_open_r (struct _reent *<[rptr]>,
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const char *<[to]>, const char *<[from]>);
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int _iconv_close_r (struct _reent *<[rptr]>, iconv_t <[cd]>);
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size_t _iconv_r (struct _reent *<[rptr]>,
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iconv_t <[cd]>, const char **<[inbuf]>,
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size_t *<[inbytesleft]>,
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char **<[outbuf]>, size_t *<[outbytesleft]>);
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DESCRIPTION
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The function <<iconv>> converts characters from <[in]> which are in one
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encoding to characters of another encoding, outputting them to <[out]>.
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The value <[inleft]> specifies the number of input bytes to convert whereas
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the value <[outleft]> specifies the size remaining in the <[out]> buffer.
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The conversion descriptor <[cd]> specifies the conversion being performed
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and is created via <<iconv_open>>.
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An <<iconv>> conversion stops if: the input bytes are exhausted, the output
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buffer is full, an invalid input character sequence occurs, or the
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conversion specifier is invalid.
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The function <<iconv_open>> is used to specify a conversion from one
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encoding: <[from]> to another: <[to]>. The result of the call is
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to create a conversion specifier that can be used with <<iconv>>.
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The function <<iconv_close>> is used to close a conversion specifier after
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it is no longer needed.
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The <<_iconv_r>>, <<_iconv_open_r>>, and <<_iconv_close_r>> functions are
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reentrant versions of <<iconv>>, <<iconv_open>>, and <<iconv_close>>,
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respectively. An additional reentrancy struct pointer: <[rptr]> is passed
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to properly set <<errno>>.
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RETURNS
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The <<iconv>> function returns the number of non-identical conversions
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performed. If an error occurs, (size_t)-1 is returned and <<errno>>
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is set appropriately. The values of <[inleft]>, <[in]>, <[out]>,
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and <[outleft]> are modified to indicate how much input was processed
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and how much output was created.
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The <<iconv_open>> function returns either a valid conversion specifier
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or (iconv_t)-1 to indicate failure. If failure occurs, <<errno>> is set
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appropriately.
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The <<iconv_close>> function returns 0 on success or -1 on failure.
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If failure occurs <<errno>> is set appropriately.
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PORTABILITY
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<<iconv>>, <<iconv_open>>, and <<iconv_close>> are non-ANSI and are specified
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by the Single Unix specification.
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No supporting OS subroutine calls are required.
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*/
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#include <_ansi.h>
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#include <reent.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <iconv.h>
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#include <wchar.h>
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#include <sys/iconvnls.h>
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#include "local.h"
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#include "conv.h"
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#include "ucsconv.h"
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/*
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* iconv interface functions as specified by Single Unix specification.
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*/
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iconv_t
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_DEFUN(iconv_open, (to, from),
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const char *to,
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const char *from)
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{
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return _iconv_open_r (_REENT, to, from);
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}
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size_t
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_DEFUN(iconv, (cd, inbuf, inbytesleft, outbuf, outbytesleft),
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iconv_t cd,
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char **__restrict inbuf,
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size_t *__restrict inbytesleft,
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char **__restrict outbuf,
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size_t *__restrict outbytesleft)
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{
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return _iconv_r (_REENT, cd, (const char **) inbuf, inbytesleft,
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outbuf, outbytesleft);
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}
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int
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_DEFUN(iconv_close, (cd), iconv_t cd)
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{
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return _iconv_close_r (_REENT, cd);
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}
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#ifndef _REENT_ONLY
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iconv_t
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_DEFUN(_iconv_open_r, (rptr, to, from),
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struct _reent *rptr,
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const char *to,
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const char *from)
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{
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iconv_conversion_t *ic;
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if (to == NULL || from == NULL || *to == '\0' || *from == '\0')
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return (iconv_t)-1;
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if ((to = (const char *)_iconv_resolve_encoding_name (rptr, to)) == NULL)
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return (iconv_t)-1;
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if ((from = (const char *)_iconv_resolve_encoding_name (rptr, from)) == NULL)
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{
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_free_r (rptr, (_VOID_PTR)to);
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return (iconv_t)-1;
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}
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ic = (iconv_conversion_t *)_malloc_r (rptr, sizeof (iconv_conversion_t));
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if (ic == NULL)
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return (iconv_t)-1;
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/* Select which conversion type to use */
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if (strcmp (from, to) == 0)
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{
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/* Use null conversion */
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ic->handlers = &_iconv_null_conversion_handlers;
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ic->data = ic->handlers->open (rptr, to, from);
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}
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else
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{
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/* Use UCS-based conversion */
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ic->handlers = &_iconv_ucs_conversion_handlers;
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ic->data = ic->handlers->open (rptr, to, from);
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}
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_free_r (rptr, (_VOID_PTR)to);
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_free_r (rptr, (_VOID_PTR)from);
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if (ic->data == NULL)
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{
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_free_r (rptr, (_VOID_PTR)ic);
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return (iconv_t)-1;
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}
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return (_VOID_PTR)ic;
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}
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size_t
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_DEFUN(_iconv_r, (rptr, cd, inbuf, inbytesleft, outbuf, outbytesleft),
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struct _reent *rptr,
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iconv_t cd,
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const char **inbuf,
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size_t *inbytesleft,
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char **outbuf,
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size_t *outbytesleft)
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{
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iconv_conversion_t *ic = (iconv_conversion_t *)cd;
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if ((_VOID_PTR)cd == NULL || cd == (iconv_t)-1 || ic->data == NULL
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|| (ic->handlers != &_iconv_null_conversion_handlers
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&& ic->handlers != &_iconv_ucs_conversion_handlers))
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{
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__errno_r (rptr) = EBADF;
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return (size_t)-1;
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}
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if (inbuf == NULL || *inbuf == NULL)
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{
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mbstate_t state_null = ICONV_ZERO_MB_STATE_T;
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if (!ic->handlers->is_stateful(ic->data, 1))
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return (size_t)0;
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if (outbuf == NULL || *outbuf == NULL)
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{
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/* Reset shift state */
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ic->handlers->set_state (ic->data, &state_null, 1);
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return (size_t)0;
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}
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if (outbytesleft != NULL)
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{
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mbstate_t state_save = ICONV_ZERO_MB_STATE_T;
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/* Save current shift state */
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ic->handlers->get_state (ic->data, &state_save, 1);
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/* Reset shift state */
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ic->handlers->set_state (ic->data, &state_null, 1);
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/* Get initial shift state sequence and it's length */
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ic->handlers->get_state (ic->data, &state_null, 1);
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if (*outbytesleft >= state_null.__count)
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{
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memcpy ((_VOID_PTR)(*outbuf), (_VOID_PTR)&state_null, state_null.__count);
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*outbuf += state_null.__count;
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*outbytesleft -= state_null.__count;
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return (size_t)0;
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}
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/* Restore shift state if output buffer is too small */
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ic->handlers->set_state (ic->data, &state_save, 1);
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}
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__errno_r (rptr) = E2BIG;
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return (size_t)-1;
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}
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if (*inbytesleft == 0)
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{
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__errno_r (rptr) = EINVAL;
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return (size_t)-1;
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}
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if (*outbytesleft == 0 || *outbuf == NULL)
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{
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__errno_r (rptr) = E2BIG;
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return (size_t)-1;
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}
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return ic->handlers->convert (rptr,
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ic->data,
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(const unsigned char**)inbuf,
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inbytesleft,
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(unsigned char**)outbuf,
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outbytesleft,
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0);
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}
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int
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_DEFUN(_iconv_close_r, (rptr, cd),
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struct _reent *rptr,
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iconv_t cd)
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{
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int res;
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iconv_conversion_t *ic = (iconv_conversion_t *)cd;
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if ((_VOID_PTR)cd == NULL || cd == (iconv_t)-1 || ic->data == NULL
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|| (ic->handlers != &_iconv_null_conversion_handlers
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&& ic->handlers != &_iconv_ucs_conversion_handlers))
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{
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__errno_r (rptr) = EBADF;
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return -1;
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}
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res = (int)ic->handlers->close (rptr, ic->data);
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_free_r (rptr, (_VOID_PTR)cd);
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return res;
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}
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#endif /* !_REENT_ONLY */
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