text: /*
   * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org>
   * 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 <sys/cdefs.h>
  
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <sys/syslimits.h>
  #include <fcntl.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  
  #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');
  		*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;
  }
  
  