Subversion Repositories Kolibri OS

/*

 * Copyright (c) 2000, 2001 Alexey Zelkin 

 * All rights reserved.

 *

 * 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 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include "setlocale.h"

#include "ldpart.h"

static int split_lines(char *, const char *);

static void set_from_buf(const char *, int, const char **);

int

__part_load_locale(const char *name,

		int *using_locale,

		char *locale_buf,

		const char *category_filename,

		int locale_buf_size_max,

		int locale_buf_size_min,

		const char **dst_localebuf) {

	static char		locale_buf_C[] = "C";

	static int		num_lines;

	int			 fd;

	char			*lbuf;

	char			*p;

	const char 		*plim;

	char                     filename[PATH_MAX];

#ifdef __USE_INTERNAL_STAT64

	struct stat64		 st;

#else

	struct stat		 st;

#endif

	size_t			 namesize;

	size_t			 bufsize;

	int                      save_using_locale;

        char *nptr;

	save_using_locale = *using_locale;

	*using_locale = 0;

	if (name == NULL)

		goto no_locale;

	if (!strcmp(name, "C") || !strcmp(name, "POSIX"))

		return 0;

	/*

	 * If the locale name is the same as our cache, use the cache.

	 */

	lbuf = locale_buf;

	if (lbuf != NULL && strcmp(name, lbuf) == 0) {

		set_from_buf(lbuf, num_lines, dst_localebuf);

		*using_locale = 1;

		return 0;

	}

	/*

	 * Slurp the locale file into the cache.

	 */

	namesize = strlen(name) + 1;

	if (!_PathLocale)

		goto no_locale;

	/* Range checking not needed, 'name' size is limited */

	strcpy(filename, _PathLocale);

	strcat(filename, "/");

	strcat(filename, name);

	strcat(filename, "/");

	strcat(filename, category_filename);

	fd = open(filename, O_RDONLY);

	if (fd < 0)

		goto no_locale;

#ifdef __USE_INTERNAL_STAT64

	if (fstat64(fd, &st) != 0)

#else

	if (fstat(fd, &st) != 0)

#endif

		goto bad_locale;

	if (st.st_size <= 0)

		goto bad_locale;

	bufsize = namesize + st.st_size + 1;

	locale_buf = NULL;

        if (lbuf == NULL || lbuf == locale_buf_C)

          {

            lbuf = malloc(bufsize);

          }

        else

          {

            nptr = realloc(lbuf, bufsize);

            if (!nptr && lbuf)

              free (lbuf);

            lbuf = nptr;

          }

	if (lbuf == NULL)

		goto bad_locale;

	(void) strcpy(lbuf, name);

	p = lbuf + namesize;

	plim = p + st.st_size;

	if (read(fd, p, (size_t) st.st_size) != st.st_size)

		goto bad_lbuf;

	if (close(fd) != 0)

		goto bad_lbuf;

	/*

	 * Parse the locale file into localebuf.

	 */

	p[st.st_size] = '\0';

	if (plim[-1] != '\n')

		goto bad_lbuf;

	num_lines = split_lines(p, plim);

	if (num_lines >= locale_buf_size_max)

		num_lines = locale_buf_size_max;

	else if (num_lines >= locale_buf_size_min)

		num_lines = locale_buf_size_min;

	else

		goto reset_locale;

	set_from_buf(lbuf, num_lines, dst_localebuf);

	/*

	 * Record the successful parse in the cache.

	 */

	locale_buf = lbuf;

	*using_locale = 1;

	return 0;

reset_locale:

	locale_buf = locale_buf_C;

	save_using_locale = 0;

bad_lbuf:

	free(lbuf);

bad_locale:

	(void)close(fd);

no_locale:

	*using_locale = save_using_locale;

	return -1;

}

static int

split_lines(char *p, const char *plim) {

	int i;

	for (i = 0; p < plim; i++) {

		p = strchr(p, '\n');

		if (!p)

			break;

		*p++ = '\0';

	}

	return i;

}

static void

set_from_buf(const char *p, int num_lines, const char **dst_localebuf) {

	const char **ap;

	int i;

	for (ap = dst_localebuf, i = 0; i < num_lines; ++ap, ++i)

		*ap = p += strlen(p) + 1;

}