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Annotation of embedaddon/axTLS/httpd/tdate_parse.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (c) Cameron Rich
                      3:  * 
                      4:  * All rights reserved.
                      5:  * 
                      6:  * Redistribution and use in source and binary forms, with or without 
                      7:  * modification, are permitted provided that the following conditions are met:
                      8:  *
                      9:  * * Redistributions of source code must retain the above copyright notice, 
                     10:  *   this list of conditions and the following disclaimer.
                     11:  * * Redistributions in binary form must reproduce the above copyright notice, 
                     12:  *   this list of conditions and the following disclaimer in the documentation 
                     13:  *   and/or other materials provided with the distribution.
                     14:  * * Neither the name of the axTLS project nor the names of its contributors 
                     15:  *   may be used to endorse or promote products derived from this software 
                     16:  *   without specific prior written permission.
                     17:  *
                     18:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
                     19:  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
                     20:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
                     21:  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
                     22:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
                     23:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
                     24:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
                     25:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
                     26:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
                     27:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
                     28:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     29:  */
                     30: 
                     31: #include <sys/types.h>
                     32: #include <ctype.h>
                     33: #include <stdio.h>
                     34: #include <stdlib.h>
                     35: #include <string.h>
                     36: #include <time.h>
                     37: #include "axhttp.h"
                     38: 
                     39: struct day_mon_map 
                     40: {
                     41:     const char* s;
                     42:     uint8_t l;
                     43: };
                     44: 
                     45: static struct day_mon_map wday_tab[] = 
                     46: {
                     47:     { "Sun", 0 }, { "Mon", 1 }, { "Tue", 2 }, { "Wed", 3 },
                     48:     { "Thu", 4 }, { "Fri", 5 }, { "Sat", 6 }, 
                     49: };
                     50: 
                     51: static struct day_mon_map mon_tab[] = 
                     52: {
                     53:     { "Jan", 0 }, { "Feb", 1 }, { "Mar", 2 }, { "Apr", 3 },
                     54:     { "May", 4 }, { "Jun", 5 }, { "Jul", 6 }, { "Aug", 7 },
                     55:     { "Sep", 8 }, { "Oct", 9 }, { "Nov", 10 }, { "Dec", 11 },
                     56: };
                     57: 
                     58: static int day_mon_map_compare(const char *v1, const char *v2)
                     59: {
                     60:     return strcmp(((struct day_mon_map*)v1)->s, ((struct day_mon_map*)v2)->s);
                     61: }
                     62: 
                     63: void tdate_init(void)
                     64: {
                     65:     qsort(wday_tab, sizeof(wday_tab)/sizeof(struct day_mon_map),
                     66:             sizeof(struct day_mon_map), 
                     67:             (int (*)(const void *, const void *))day_mon_map_compare);
                     68:     qsort(mon_tab, sizeof(mon_tab)/sizeof(struct day_mon_map),
                     69:             sizeof(struct day_mon_map), 
                     70:             (int (*)(const void *, const void *))day_mon_map_compare);
                     71: }
                     72: 
                     73: static int8_t day_mon_map_search(const char* str, 
                     74:                             const struct day_mon_map* tab, int n)
                     75: {
                     76:     struct day_mon_map *search = bsearch(&str, tab, n,
                     77:             sizeof(struct day_mon_map), 
                     78:                 (int (*)(const void *, const void *))day_mon_map_compare);
                     79:     return search ? search->l : -1;
                     80: }
                     81: 
                     82: time_t tdate_parse(const char* str)
                     83: {
                     84:     struct tm tm;
                     85:     char str_mon[4], str_wday[4];
                     86:     int tm_sec, tm_min, tm_hour, tm_mday, tm_year;
                     87: 
                     88:     /* Initialize. */
                     89:     memset(&tm, 0, sizeof(struct tm));
                     90: 
                     91:     /* wdy, DD mth YY HH:MM:SS GMT */
                     92:     if (sscanf(str, "%3[a-zA-Z], %d %3[a-zA-Z] %d %d:%d:%d GMT",
                     93:                 str_wday, &tm_mday, str_mon, &tm_year, &tm_hour, &tm_min,
                     94:                     &tm_sec) == 7)
                     95:     {
                     96:         int8_t tm_wday = day_mon_map_search(str_wday, wday_tab, 
                     97:                         sizeof(wday_tab)/sizeof(struct day_mon_map));
                     98:         int8_t tm_mon = day_mon_map_search(str_mon, mon_tab, 
                     99:                         sizeof(mon_tab)/sizeof(struct day_mon_map));
                    100: 
                    101:         if (tm_wday < 0 || tm_mon < 0)
                    102:             return -1;
                    103: 
                    104:         tm.tm_wday = tm_wday;
                    105:         tm.tm_mon = tm_mon;
                    106:         tm.tm_mday = tm_mday;
                    107:         tm.tm_hour = tm_hour;
                    108:         tm.tm_min = tm_min;
                    109:         tm.tm_sec = tm_sec;
                    110:         tm.tm_year = tm_year - 1900;
                    111:         return mktime(&tm);
                    112:     }
                    113: 
                    114:     return -1;  /* error */
                    115: }