* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2014, 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
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
- * $Id$
***************************************************************************/
/*
A brief summary of the date string formats this parser groks:
20040911 +0200
*/
-#include "setup.h"
-#include <stdio.h>
-#include <ctype.h>
-#include <string.h>
-#ifdef HAVE_STDLIB_H
-#include <stdlib.h> /* for strtol() */
+#include "curl_setup.h"
+
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
#endif
#include <curl/curl.h>
-
-static time_t Curl_parsedate(const char *date);
+#include "rawstr.h"
+#include "warnless.h"
+#include "parsedate.h"
const char * const Curl_wkday[] =
{"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
struct tzinfo {
- const char *name;
+ 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}, /* British Summer */
- {"WAT", 60}, /* West Africa */
- {"AST", 240}, /* Atlantic Standard */
- {"ADT", 240}, /* Atlantic Daylight */
- {"EST", 300}, /* Eastern Standard */
- {"EDT", 300}, /* Eastern Daylight */
- {"CST", 360}, /* Central Standard */
- {"CDT", 360}, /* Central Daylight */
- {"MST", 420}, /* Mountain Standard */
- {"MDT", 420}, /* Mountain Daylight */
- {"PST", 480}, /* Pacific Standard */
- {"PDT", 480}, /* Pacific Daylight */
- {"YST", 540}, /* Yukon Standard */
- {"YDT", 540}, /* Yukon Daylight */
- {"HST", 600}, /* Hawaii Standard */
- {"HDT", 600}, /* 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", -120}, /* Middle European Summer */
- {"CEST", -120}, /* Central European Summer */
- {"MESZ", -60}, /* Middle European Summer */
- {"FWT", -60}, /* French Winter */
- {"FST", -60}, /* French Summer */
- {"EET", -120}, /* Eastern Europe, USSR Zone 1 */
- {"WAST", -420}, /* West Australian Standard */
- {"WADT", -420}, /* West Australian Daylight */
- {"CCT", -480}, /* China Coast, USSR Zone 7 */
- {"JST", -540}, /* Japan Standard, USSR Zone 8 */
- {"EAST", -600}, /* Eastern Australian Standard */
- {"EADT", -600}, /* Eastern Australian Daylight */
- {"GST", -600}, /* Guam Standard, USSR Zone 9 */
- {"NZT", -720}, /* New Zealand */
- {"NZST", -720}, /* New Zealand Standard */
- {"NZDT", -720}, /* New Zealand Daylight */
- {"IDLE", -720}, /* International Date Line East */
+ {"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:
0 monday - 6 sunday
*/
-static int checkday(char *check, size_t len)
+static int checkday(const char *check, size_t len)
{
int i;
const char * const *what;
else
what = &Curl_wkday[0];
for(i=0; i<7; i++) {
- if(curl_strequal(check, what[0])) {
+ if(Curl_raw_equal(check, what[0])) {
found=TRUE;
break;
}
return found?i:-1;
}
-static int checkmonth(char *check)
+static int checkmonth(const char *check)
{
int i;
const char * const *what;
what = &Curl_month[0];
for(i=0; i<12; i++) {
- if(curl_strequal(check, what[0])) {
+ if(Curl_raw_equal(check, what[0])) {
found=TRUE;
break;
}
/* 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(char *check)
+static int checktz(const char *check)
{
unsigned int i;
const struct tzinfo *what;
what = tz;
for(i=0; i< sizeof(tz)/sizeof(tz[0]); i++) {
- if(curl_strequal(check, what->name)) {
+ if(Curl_raw_equal(check, what->name)) {
found=TRUE;
break;
}
static void skip(const char **date)
{
/* skip everything that aren't letters or digits */
- while(**date && !isalnum((int)**date))
+ while(**date && !ISALNUM(**date))
(*date)++;
}
DATE_TIME
};
-static time_t Curl_parsedate(const char *date)
+/* 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 secnum=-1;
int yearnum=-1;
int tzoff=-1;
- struct tm tm;
+ 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)) {
skip(&date);
- if(isalpha((int)*date)) {
+ if(ISALPHA(*date)) {
/* a name coming up */
char buf[32]="";
size_t len;
- sscanf(date, "%31[A-Za-z]", buf);
- len = strlen(buf);
+ if(sscanf(date, "%31[ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz]", buf))
+ len = strlen(buf);
+ else
+ len = 0;
if(wdaynum == -1) {
wdaynum = checkday(buf, len);
}
if(!found)
- return -1; /* bad string */
+ return PARSEDATE_FAIL; /* bad string */
date += len;
}
- else if(isdigit((int)*date)) {
+ else if(ISDIGIT(*date)) {
/* a digit */
int val;
char *end;
(3 == sscanf(date, "%02d:%02d:%02d", &hournum, &minnum, &secnum))) {
/* time stamp! */
date += 8;
- found = TRUE;
+ }
+ else if((secnum == -1) &&
+ (2 == sscanf(date, "%02d:%02d", &hournum, &minnum))) {
+ /* time stamp without seconds */
+ date += 5;
+ secnum = 0;
}
else {
- val = (int)strtol(date, &end, 10);
+ 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 LONG_MAX != INT_MAX
+ if((lval > (long)INT_MAX) || (lval < (long)INT_MIN))
+ return PARSEDATE_FAIL;
+#endif
+
+ val = curlx_sltosi(lval);
if((tzoff == -1) &&
((end - date) == 4) &&
- (val < 1300) &&
+ (val <= 1400) &&
(indate< date) &&
((date[-1] == '+' || date[-1] == '-'))) {
- /* four digits and a value less than 1300 and it is preceeded with
- a plus or minus. This is a time zone indication. */
+ /* 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;
yearnum = val;
found = TRUE;
if(yearnum < 1900) {
- if (yearnum > 70)
+ if(yearnum > 70)
yearnum += 1900;
else
yearnum += 2000;
}
if(!found)
- return -1;
+ return PARSEDATE_FAIL;
date = end;
}
(-1 == monnum) ||
(-1 == yearnum))
/* lacks vital info, fail */
- return -1;
+ return PARSEDATE_FAIL;
#if SIZEOF_TIME_T < 5
/* 32 bit time_t can only hold dates to the beginning of 2038 */
- if(yearnum > 2037)
- return 0x7fffffff;
+ 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;
- tm.tm_wday = 0;
- tm.tm_yday = 0;
- tm.tm_isdst = 0;
- /* mktime() returns a time_t. time_t is often 32 bits, even on many
+ /* 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 some of the systems with 64 bit time_t returns -1 for dates beyond
- 03:14:07 UTC, January 19, 2038. (Such as AIX 5100-06)
+ 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 = mktime(&tm);
+ t = my_timegm(&tm);
- /* time zone adjust */
- if(-1 != t) {
- struct tm *gmt;
- long delta;
- time_t t2;
+ /* time zone adjust (cast t to int to compare to negative one) */
+ if(-1 != (int)t) {
-#ifdef HAVE_GMTIME_R
- /* thread-safe version */
- struct tm keeptime2;
- gmt = (struct tm *)gmtime_r(&t, &keeptime2);
-#else
- gmt = gmtime(&t); /* use gmtime_r() if available */
-#endif
- if(!gmt)
- return -1; /* illegal date/time */
+ /* Add the time zone diff between local time zone and GMT. */
+ long delta = (long)(tzoff!=-1?tzoff:0);
- t2 = mktime(gmt);
-
- /* Add the time zone diff (between the given timezone and GMT) and the
- diff between the local time zone and GMT. */
- delta = (tzoff!=-1?tzoff:0) + (t - t2);
-
- if((delta>0) && (t + delta < t))
+ if((delta>0) && (t > LONG_MAX - delta))
return -1; /* time_t overflow */
t += delta;
}
- return t;
+ *output = t;
+
+ return PARSEDATE_OK;
}
time_t curl_getdate(const char *p, const time_t *now)
{
- (void)now;
- return Curl_parsedate(p);
+ 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;
}
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