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Diffstat (limited to 'lib/parsedate.c')
| -rw-r--r-- | lib/parsedate.c | 580 |
1 files changed, 0 insertions, 580 deletions
diff --git a/lib/parsedate.c b/lib/parsedate.c deleted file mode 100644 index a50b6074e..000000000 --- a/lib/parsedate.c +++ /dev/null @@ -1,580 +0,0 @@ -/*************************************************************************** - * _ _ ____ _ - * Project ___| | | | _ \| | - * / __| | | | |_) | | - * | (__| |_| | _ <| |___ - * \___|\___/|_| \_\_____| - * - * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al. - * - * This software is licensed as described in the file COPYING, which - * you should have received as part of this distribution. The terms - * are also available at http://curl.haxx.se/docs/copyright.html. - * - * You may opt to use, copy, modify, merge, publish, distribute and/or sell - * copies of the Software, and permit persons to whom the Software is - * furnished to do so, under the terms of the COPYING file. - * - * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY - * KIND, either express or implied. - * - ***************************************************************************/ -/* - A brief summary of the date string formats this parser groks: - - RFC 2616 3.3.1 - - Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123 - Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036 - Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format - - we support dates without week day name: - - 06 Nov 1994 08:49:37 GMT - 06-Nov-94 08:49:37 GMT - Nov 6 08:49:37 1994 - - without the time zone: - - 06 Nov 1994 08:49:37 - 06-Nov-94 08:49:37 - - weird order: - - 1994 Nov 6 08:49:37 (GNU date fails) - GMT 08:49:37 06-Nov-94 Sunday - 94 6 Nov 08:49:37 (GNU date fails) - - time left out: - - 1994 Nov 6 - 06-Nov-94 - Sun Nov 6 94 - - unusual separators: - - 1994.Nov.6 - Sun/Nov/6/94/GMT - - commonly used time zone names: - - Sun, 06 Nov 1994 08:49:37 CET - 06 Nov 1994 08:49:37 EST - - time zones specified using RFC822 style: - - Sun, 12 Sep 2004 15:05:58 -0700 - Sat, 11 Sep 2004 21:32:11 +0200 - - compact numerical date strings: - - 20040912 15:05:58 -0700 - 20040911 +0200 - -*/ - -#include "curl_setup.h" - -#ifdef HAVE_LIMITS_H -#include <limits.h> -#endif - -#include <curl/curl.h> -#include "curl_rawstr.h" -#include "curl_warnless.h" -#include "curl_parsedate.h" - -const char * const Curl_wkday[] = -{"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"}; -static const char * const weekday[] = -{ "Monday", "Tuesday", "Wednesday", "Thursday", - "Friday", "Saturday", "Sunday" }; -const char * const Curl_month[]= -{ "Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; - -struct tzinfo { - char name[5]; - int offset; /* +/- in minutes */ -}; - -/* - * parsedate() - * - * Returns: - * - * PARSEDATE_OK - a fine conversion - * PARSEDATE_FAIL - failed to convert - * PARSEDATE_LATER - time overflow at the far end of time_t - * PARSEDATE_SOONER - time underflow at the low end of time_t - */ - -static int parsedate(const char *date, time_t *output); - -#define PARSEDATE_OK 0 -#define PARSEDATE_FAIL -1 -#define PARSEDATE_LATER 1 -#define PARSEDATE_SOONER 2 - -/* Here's a bunch of frequently used time zone names. These were supported - by the old getdate parser. */ -#define tDAYZONE -60 /* offset for daylight savings time */ -static const struct tzinfo tz[]= { - {"GMT", 0}, /* Greenwich Mean */ - {"UTC", 0}, /* Universal (Coordinated) */ - {"WET", 0}, /* Western European */ - {"BST", 0 tDAYZONE}, /* British Summer */ - {"WAT", 60}, /* West Africa */ - {"AST", 240}, /* Atlantic Standard */ - {"ADT", 240 tDAYZONE}, /* Atlantic Daylight */ - {"EST", 300}, /* Eastern Standard */ - {"EDT", 300 tDAYZONE}, /* Eastern Daylight */ - {"CST", 360}, /* Central Standard */ - {"CDT", 360 tDAYZONE}, /* Central Daylight */ - {"MST", 420}, /* Mountain Standard */ - {"MDT", 420 tDAYZONE}, /* Mountain Daylight */ - {"PST", 480}, /* Pacific Standard */ - {"PDT", 480 tDAYZONE}, /* Pacific Daylight */ - {"YST", 540}, /* Yukon Standard */ - {"YDT", 540 tDAYZONE}, /* Yukon Daylight */ - {"HST", 600}, /* Hawaii Standard */ - {"HDT", 600 tDAYZONE}, /* Hawaii Daylight */ - {"CAT", 600}, /* Central Alaska */ - {"AHST", 600}, /* Alaska-Hawaii Standard */ - {"NT", 660}, /* Nome */ - {"IDLW", 720}, /* International Date Line West */ - {"CET", -60}, /* Central European */ - {"MET", -60}, /* Middle European */ - {"MEWT", -60}, /* Middle European Winter */ - {"MEST", -60 tDAYZONE}, /* Middle European Summer */ - {"CEST", -60 tDAYZONE}, /* Central European Summer */ - {"MESZ", -60 tDAYZONE}, /* Middle European Summer */ - {"FWT", -60}, /* French Winter */ - {"FST", -60 tDAYZONE}, /* French Summer */ - {"EET", -120}, /* Eastern Europe, USSR Zone 1 */ - {"WAST", -420}, /* West Australian Standard */ - {"WADT", -420 tDAYZONE}, /* West Australian Daylight */ - {"CCT", -480}, /* China Coast, USSR Zone 7 */ - {"JST", -540}, /* Japan Standard, USSR Zone 8 */ - {"EAST", -600}, /* Eastern Australian Standard */ - {"EADT", -600 tDAYZONE}, /* Eastern Australian Daylight */ - {"GST", -600}, /* Guam Standard, USSR Zone 9 */ - {"NZT", -720}, /* New Zealand */ - {"NZST", -720}, /* New Zealand Standard */ - {"NZDT", -720 tDAYZONE}, /* New Zealand Daylight */ - {"IDLE", -720}, /* International Date Line East */ - /* Next up: Military timezone names. RFC822 allowed these, but (as noted in - RFC 1123) had their signs wrong. Here we use the correct signs to match - actual military usage. - */ - {"A", +1 * 60}, /* Alpha */ - {"B", +2 * 60}, /* Bravo */ - {"C", +3 * 60}, /* Charlie */ - {"D", +4 * 60}, /* Delta */ - {"E", +5 * 60}, /* Echo */ - {"F", +6 * 60}, /* Foxtrot */ - {"G", +7 * 60}, /* Golf */ - {"H", +8 * 60}, /* Hotel */ - {"I", +9 * 60}, /* India */ - /* "J", Juliet is not used as a timezone, to indicate the observer's local - time */ - {"K", +10 * 60}, /* Kilo */ - {"L", +11 * 60}, /* Lima */ - {"M", +12 * 60}, /* Mike */ - {"N", -1 * 60}, /* November */ - {"O", -2 * 60}, /* Oscar */ - {"P", -3 * 60}, /* Papa */ - {"Q", -4 * 60}, /* Quebec */ - {"R", -5 * 60}, /* Romeo */ - {"S", -6 * 60}, /* Sierra */ - {"T", -7 * 60}, /* Tango */ - {"U", -8 * 60}, /* Uniform */ - {"V", -9 * 60}, /* Victor */ - {"W", -10 * 60}, /* Whiskey */ - {"X", -11 * 60}, /* X-ray */ - {"Y", -12 * 60}, /* Yankee */ - {"Z", 0}, /* Zulu, zero meridian, a.k.a. UTC */ -}; - -/* returns: - -1 no day - 0 monday - 6 sunday -*/ - -static int checkday(const char *check, size_t len) -{ - int i; - const char * const *what; - bool found= FALSE; - if(len > 3) - what = &weekday[0]; - else - what = &Curl_wkday[0]; - for(i=0; i<7; i++) { - if(Curl_raw_equal(check, what[0])) { - found=TRUE; - break; - } - what++; - } - return found?i:-1; -} - -static int checkmonth(const char *check) -{ - int i; - const char * const *what; - bool found= FALSE; - - what = &Curl_month[0]; - for(i=0; i<12; i++) { - if(Curl_raw_equal(check, what[0])) { - found=TRUE; - break; - } - what++; - } - return found?i:-1; /* return the offset or -1, no real offset is -1 */ -} - -/* return the time zone offset between GMT and the input one, in number - of seconds or -1 if the timezone wasn't found/legal */ - -static int checktz(const char *check) -{ - unsigned int i; - const struct tzinfo *what; - bool found= FALSE; - - what = tz; - for(i=0; i< sizeof(tz)/sizeof(tz[0]); i++) { - if(Curl_raw_equal(check, what->name)) { - found=TRUE; - break; - } - what++; - } - return found?what->offset*60:-1; -} - -static void skip(const char **date) -{ - /* skip everything that aren't letters or digits */ - while(**date && !ISALNUM(**date)) - (*date)++; -} - -enum assume { - DATE_MDAY, - DATE_YEAR, - DATE_TIME -}; - -/* this is a clone of 'struct tm' but with all fields we don't need or use - cut out */ -struct my_tm { - int tm_sec; - int tm_min; - int tm_hour; - int tm_mday; - int tm_mon; - int tm_year; -}; - -/* struct tm to time since epoch in GMT time zone. - * This is similar to the standard mktime function but for GMT only, and - * doesn't suffer from the various bugs and portability problems that - * some systems' implementations have. - */ -static time_t my_timegm(struct my_tm *tm) -{ - static const int month_days_cumulative [12] = - { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 }; - int month, year, leap_days; - - if(tm->tm_year < 70) - /* we don't support years before 1970 as they will cause this function - to return a negative value */ - return -1; - - year = tm->tm_year + 1900; - month = tm->tm_mon; - if(month < 0) { - year += (11 - month) / 12; - month = 11 - (11 - month) % 12; - } - else if(month >= 12) { - year -= month / 12; - month = month % 12; - } - - leap_days = year - (tm->tm_mon <= 1); - leap_days = ((leap_days / 4) - (leap_days / 100) + (leap_days / 400) - - (1969 / 4) + (1969 / 100) - (1969 / 400)); - - return ((((time_t) (year - 1970) * 365 - + leap_days + month_days_cumulative [month] + tm->tm_mday - 1) * 24 - + tm->tm_hour) * 60 + tm->tm_min) * 60 + tm->tm_sec; -} - -/* - * parsedate() - * - * Returns: - * - * PARSEDATE_OK - a fine conversion - * PARSEDATE_FAIL - failed to convert - * PARSEDATE_LATER - time overflow at the far end of time_t - * PARSEDATE_SOONER - time underflow at the low end of time_t - */ - -static int parsedate(const char *date, time_t *output) -{ - time_t t = 0; - int wdaynum=-1; /* day of the week number, 0-6 (mon-sun) */ - int monnum=-1; /* month of the year number, 0-11 */ - int mdaynum=-1; /* day of month, 1 - 31 */ - int hournum=-1; - int minnum=-1; - int secnum=-1; - int yearnum=-1; - int tzoff=-1; - struct my_tm tm; - enum assume dignext = DATE_MDAY; - const char *indate = date; /* save the original pointer */ - int part = 0; /* max 6 parts */ - - while(*date && (part < 6)) { - bool found=FALSE; - - skip(&date); - - if(ISALPHA(*date)) { - /* a name coming up */ - char buf[32]=""; - size_t len; - sscanf(date, "%31[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz]", - buf); - len = strlen(buf); - - if(wdaynum == -1) { - wdaynum = checkday(buf, len); - if(wdaynum != -1) - found = TRUE; - } - if(!found && (monnum == -1)) { - monnum = checkmonth(buf); - if(monnum != -1) - found = TRUE; - } - - if(!found && (tzoff == -1)) { - /* this just must be a time zone string */ - tzoff = checktz(buf); - if(tzoff != -1) - found = TRUE; - } - - if(!found) - return PARSEDATE_FAIL; /* bad string */ - - date += len; - } - else if(ISDIGIT(*date)) { - /* a digit */ - int val; - char *end; - if((secnum == -1) && - (3 == sscanf(date, "%02d:%02d:%02d", &hournum, &minnum, &secnum))) { - /* time stamp! */ - date += 8; - } - else if((secnum == -1) && - (2 == sscanf(date, "%02d:%02d", &hournum, &minnum))) { - /* time stamp without seconds */ - date += 5; - secnum = 0; - } - else { - long lval; - int error; - int old_errno; - - old_errno = ERRNO; - SET_ERRNO(0); - lval = strtol(date, &end, 10); - error = ERRNO; - if(error != old_errno) - SET_ERRNO(old_errno); - - if(error) - return PARSEDATE_FAIL; - - if((lval > (long)INT_MAX) || (lval < (long)INT_MIN)) - return PARSEDATE_FAIL; - - val = curlx_sltosi(lval); - - if((tzoff == -1) && - ((end - date) == 4) && - (val <= 1400) && - (indate< date) && - ((date[-1] == '+' || date[-1] == '-'))) { - /* four digits and a value less than or equal to 1400 (to take into - account all sorts of funny time zone diffs) and it is preceded - with a plus or minus. This is a time zone indication. 1400 is - picked since +1300 is frequently used and +1400 is mentioned as - an edge number in the document "ISO C 200X Proposal: Timezone - Functions" at http://david.tribble.com/text/c0xtimezone.html If - anyone has a more authoritative source for the exact maximum time - zone offsets, please speak up! */ - found = TRUE; - tzoff = (val/100 * 60 + val%100)*60; - - /* the + and - prefix indicates the local time compared to GMT, - this we need ther reversed math to get what we want */ - tzoff = date[-1]=='+'?-tzoff:tzoff; - } - - if(((end - date) == 8) && - (yearnum == -1) && - (monnum == -1) && - (mdaynum == -1)) { - /* 8 digits, no year, month or day yet. This is YYYYMMDD */ - found = TRUE; - yearnum = val/10000; - monnum = (val%10000)/100-1; /* month is 0 - 11 */ - mdaynum = val%100; - } - - if(!found && (dignext == DATE_MDAY) && (mdaynum == -1)) { - if((val > 0) && (val<32)) { - mdaynum = val; - found = TRUE; - } - dignext = DATE_YEAR; - } - - if(!found && (dignext == DATE_YEAR) && (yearnum == -1)) { - yearnum = val; - found = TRUE; - if(yearnum < 1900) { - if(yearnum > 70) - yearnum += 1900; - else - yearnum += 2000; - } - if(mdaynum == -1) - dignext = DATE_MDAY; - } - - if(!found) - return PARSEDATE_FAIL; - - date = end; - } - } - - part++; - } - - if(-1 == secnum) - secnum = minnum = hournum = 0; /* no time, make it zero */ - - if((-1 == mdaynum) || - (-1 == monnum) || - (-1 == yearnum)) - /* lacks vital info, fail */ - return PARSEDATE_FAIL; - -#if SIZEOF_TIME_T < 5 - /* 32 bit time_t can only hold dates to the beginning of 2038 */ - if(yearnum > 2037) { - *output = 0x7fffffff; - return PARSEDATE_LATER; - } -#endif - - if(yearnum < 1970) { - *output = 0; - return PARSEDATE_SOONER; - } - - if((mdaynum > 31) || (monnum > 11) || - (hournum > 23) || (minnum > 59) || (secnum > 60)) - return PARSEDATE_FAIL; /* clearly an illegal date */ - - tm.tm_sec = secnum; - tm.tm_min = minnum; - tm.tm_hour = hournum; - tm.tm_mday = mdaynum; - tm.tm_mon = monnum; - tm.tm_year = yearnum - 1900; - - /* my_timegm() returns a time_t. time_t is often 32 bits, even on many - architectures that feature 64 bit 'long'. - - Some systems have 64 bit time_t and deal with years beyond 2038. However, - even on some of the systems with 64 bit time_t mktime() returns -1 for - dates beyond 03:14:07 UTC, January 19, 2038. (Such as AIX 5100-06) - */ - t = my_timegm(&tm); - - /* time zone adjust (cast t to int to compare to negative one) */ - if(-1 != (int)t) { - - /* Add the time zone diff between local time zone and GMT. */ - long delta = (long)(tzoff!=-1?tzoff:0); - - if((delta>0) && (t + delta < t)) - return -1; /* time_t overflow */ - - t += delta; - } - - *output = t; - - return PARSEDATE_OK; -} - -time_t curl_getdate(const char *p, const time_t *now) -{ - time_t parsed; - int rc = parsedate(p, &parsed); - (void)now; /* legacy argument from the past that we ignore */ - - switch(rc) { - case PARSEDATE_OK: - case PARSEDATE_LATER: - case PARSEDATE_SOONER: - return parsed; - } - /* everything else is fail */ - return -1; -} - -/* - * Curl_gmtime() is a gmtime() replacement for portability. Do not use the - * gmtime_r() or gmtime() functions anywhere else but here. - * - * To make sure no such function calls slip in, we define them to cause build - * errors, which is why we use the name within parentheses in this function. - * - */ - -CURLcode Curl_gmtime(time_t intime, struct tm *store) -{ - const struct tm *tm; -#ifdef HAVE_GMTIME_R - /* thread-safe version */ - tm = (struct tm *)gmtime_r(&intime, store); -#else - tm = gmtime(&intime); - if(tm) - *store = *tm; /* copy the pointed struct to the local copy */ -#endif - - if(!tm) - return CURLE_BAD_FUNCTION_ARGUMENT; - return CURLE_OK; -} |