diff options
Diffstat (limited to 'newlib/libc/iconv/lib/loaddata.c')
| -rw-r--r-- | newlib/libc/iconv/lib/loaddata.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/newlib/libc/iconv/lib/loaddata.c b/newlib/libc/iconv/lib/loaddata.c new file mode 100644 index 000000000..d5994c9ce --- /dev/null +++ b/newlib/libc/iconv/lib/loaddata.c @@ -0,0 +1,120 @@ +/* + * 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 */ +} + |