--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/lib/parsedate.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,607 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2019, 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 https://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"
+
+#include <limits.h>
+
+#include <curl/curl.h>
+#include "strcase.h"
+#include "warnless.h"
+#include "parsedate.h"
+
+/*
+ * 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
+
+#ifndef CURL_DISABLE_PARSEDATE
+
+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 */
+};
+
+/* 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 */
+  {"UT",  0},              /* Universal Time */
+  {"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(strcasecompare(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(strcasecompare(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(strcasecompare(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; /* full 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.
+ *
+ * Returns 0 on success, otherwise non-zero.
+ */
+static void my_timegm(struct my_tm *tm, time_t *t)
+{
+  static const int month_days_cumulative [12] =
+    { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
+  int month, year, leap_days;
+
+  year = tm->tm_year;
+  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));
+
+  *t = ((((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;
+      if(sscanf(date, "%31[ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                          "abcdefghijklmnopqrstuvwxyz]", buf))
+        len = strlen(buf);
+      else
+        len = 0;
+
+      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;
+      int len = 0;
+      if((secnum == -1) &&
+         (3 == sscanf(date, "%02d:%02d:%02d%n",
+                      &hournum, &minnum, &secnum, &len))) {
+        /* time stamp! */
+        date += len;
+      }
+      else if((secnum == -1) &&
+              (2 == sscanf(date, "%02d:%02d%n", &hournum, &minnum, &len))) {
+        /* time stamp without seconds */
+        date += len;
+        secnum = 0;
+      }
+      else {
+        long lval;
+        int error;
+        int old_errno;
+
+        old_errno = errno;
+        errno = 0;
+        lval = strtol(date, &end, 10);
+        error = errno;
+        if(errno != old_errno)
+          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 <= 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 their 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 < 100) {
+            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;
+
+#ifdef HAVE_TIME_T_UNSIGNED
+  if(yearnum < 1970) {
+    /* only positive numbers cannot return earlier */
+    *output = TIME_T_MIN;
+    return PARSEDATE_SOONER;
+  }
+#endif
+
+#if (SIZEOF_TIME_T < 5)
+
+#ifdef HAVE_TIME_T_UNSIGNED
+  /* an unsigned 32 bit time_t can only hold dates to 2106 */
+  if(yearnum > 2105) {
+    *output = TIME_T_MAX;
+    return PARSEDATE_LATER;
+  }
+#else
+  /* a signed 32 bit time_t can only hold dates to the beginning of 2038 */
+  if(yearnum > 2037) {
+    *output = TIME_T_MAX;
+    return PARSEDATE_LATER;
+  }
+  if(yearnum < 1903) {
+    *output = TIME_T_MIN;
+    return PARSEDATE_SOONER;
+  }
+#endif
+
+#else
+  /* The Gregorian calendar was introduced 1582 */
+  if(yearnum < 1583)
+    return PARSEDATE_FAIL;
+#endif
+
+  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;
+
+  /* my_timegm() returns a time_t. time_t is often 32 bits, sometimes even on
+     architectures that feature 64 bit 'long' but ultimately time_t is the
+     correct data type to use.
+  */
+  my_timegm(&tm, &t);
+
+  /* Add the time zone diff between local time zone and GMT. */
+  if(tzoff == -1)
+    tzoff = 0;
+
+  if((tzoff > 0) && (t > TIME_T_MAX - tzoff)) {
+    *output = TIME_T_MAX;
+    return PARSEDATE_LATER; /* time_t overflow */
+  }
+
+  t += tzoff;
+
+  *output = t;
+
+  return PARSEDATE_OK;
+}
+#else
+/* disabled */
+static int parsedate(const char *date, time_t *output)
+{
+  (void)date;
+  *output = 0;
+  return PARSEDATE_OK; /* a lie */
+}
+#endif
+
+time_t curl_getdate(const char *p, const time_t *now)
+{
+  time_t parsed = -1;
+  int rc = parsedate(p, &parsed);
+  (void)now; /* legacy argument from the past that we ignore */
+
+  if(rc == PARSEDATE_OK) {
+    if(parsed == -1)
+      /* avoid returning -1 for a working scenario */
+      parsed++;
+    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.
+ *
+ */
+
+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;
+}