source: vendor/3.5.10/source3/web/neg_lang.c

/*
   Unix SMB/CIFS implementation.
   SWAT language handling
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.

   Created by Ryo Kawahara <rkawa@lbe.co.jp> 
*/

#include "includes.h"
#include "web/swat_proto.h"

/*
  during a file download we first check to see if there is a language
  specific file available. If there is then use that, otherwise 
  just open the specified file
*/
int web_open(const char *fname, int flags, mode_t mode)
{
        char *p = NULL;
        char *lang = lang_tdb_current();
        int fd;
        if (lang) {
                if (asprintf(&p, "lang/%s/%s", lang, fname) != -1) {
                        fd = sys_open(p, flags, mode);
                        free(p);
                        if (fd != -1) {
                                return fd;
                        }
                }
        }

        /* fall through to default name */
        return sys_open(fname, flags, mode);
}


struct pri_list {
        float pri;
        char *string;
};

static int qsort_cmp_list(const void *x, const void *y) {
        struct pri_list *a = (struct pri_list *)x;
        struct pri_list *b = (struct pri_list *)y;
        if (a->pri > b->pri) return -1;
        if (a->pri < b->pri) return 1;
        return 0;
}

/*
  choose from a list of languages. The list can be comma or space
  separated
  Keep choosing until we get a hit 
  Changed to habdle priority -- Simo
*/

void web_set_lang(const char *lang_string)
{
        char **lang_list, **count;
        struct pri_list *pl;
        int lang_num, i;

        /* build the lang list */
        lang_list = str_list_make_v3(talloc_tos(), lang_string, ", \t\r\n");
        if (!lang_list) return;
        
        /* sort the list by priority */
        lang_num = 0;
        count = lang_list;
        while (*count && **count) {
                count++;
                lang_num++;
        }
        pl = SMB_MALLOC_ARRAY(struct pri_list, lang_num);
        if (!pl) {
                return;
        }

        for (i = 0; i < lang_num; i++) {
                char *pri_code;
                if ((pri_code=strstr(lang_list[i], ";q="))) {
                        *pri_code = '\0';
                        pri_code += 3;
                        sscanf(pri_code, "%f", &(pl[i].pri));
                } else {
                        pl[i].pri = 1;
                }
                pl[i].string = SMB_STRDUP(lang_list[i]);
        }
        TALLOC_FREE(lang_list);

        qsort(pl, lang_num, sizeof(struct pri_list), &qsort_cmp_list);

        /* it's not an error to not initialise - we just fall back to 
           the default */

        for (i = 0; i < lang_num; i++) {
                if (lang_tdb_init(pl[i].string)) break;
        }

        for (i = 0; i < lang_num; i++) {
                SAFE_FREE(pl[i].string);
        }
        SAFE_FREE(pl);

        return;
}