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/*
* Copyright (c) 2003, Artem B. Bityuckiy, SoftMine Corporation.
* Rights transferred to Franklin Electronic Publishers.
*
* 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 <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <reent.h>
#include <assert.h>
#include "local.h"
#ifdef _POSIX_MAPPED_FILES /* Should be defined in unistd.h if mmap/munmap */
#include <sys/mman.h> /* are supported */
#endif
/*
* _iconv_load_file - load CCS file into memory.
*
* PARAMETERS:
* struct _reent *rptr - reent structure.
* _CONST char *fname - file name.
* _iconv_fd_t *desc - CCS file descriptor.
*
* DESCRIPTION:
* _iconv_load_file - is used to load charset file into memory.
* Uses mmap() if possible. To close file - use _iconv_unload_file.
*
* RETURN: 0 if success, -1 if failure.
*/
int
_DEFUN(_iconv_load_file, (rptr, fname, desc),
struct _reent *rptr _AND
_CONST char *fname _AND
_iconv_fd_t *desc)
{
int fd;
#ifndef _POSIX_MAPPED_FILES
off_t len;
#endif
assert(desc != NULL);
if ((fd = _open_r(rptr, fname, O_RDONLY, S_IRUSR)) < 0)
return -1;
if ((desc->len = (size_t)_lseek_r(rptr, fd, 0, SEEK_END)) == (off_t)-1 ||
_lseek_r(rptr, fd, 0, SEEK_SET) == (off_t)-1)
goto close_and_exit;
#ifdef _POSIX_MAPPED_FILES
if ((desc->mem = _mmap_r(rptr, NULL, desc->len,
PROT_READ, MAP_FIXED, fd, (off_t)0)) == MAP_FAILED)
goto close_and_exit;
#else
if ((desc->mem = _malloc_r(rptr, desc->len)) == NULL)
goto close_and_exit;
if ((len = _read_r(rptr, fd, desc->mem, desc->len)) < 0 || len != desc->len)
{
_free_r(rptr, desc->mem);
goto close_and_exit;
}
#endif /* #ifdef _POSIX_MAPPED_FILES */
_close_r(rptr, fd);
return 0;
close_and_exit:
_close_r(rptr, fd);
return -1;
}
/*
* _iconv_unload_file - unload file loaded by _iconv_load_file.
*
* PARAMETERS:
* struct _reent *rptr - reent strucutre.
* _iconv_fd_t *desc - NLS file descriptor.
*
* DESCRIPTION:
* Unloads CCS file previously loaded with _iconv_load_file.
*
* RETURN: 0 if success, -1 if failure.
*/
int
_DEFUN(_iconv_unload_file, (rptr, desc),
struct _reent *rptr _AND
_iconv_fd_t *desc)
{
assert(desc != NULL);
assert(desc->mem != NULL);
#ifdef _POSIX_MAPPED_FILES
assert(desc->len > 0);
return _munmap_r(rptr, desc->mem, desc->len);
#else
_free_r(rptr, desc->mem);
return 0;
#endif /* #ifdef _POSIX_MAPPED_FILES */
}
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