* BIG shuffle:
[citadel.git] / webcit / fmt_date.c
index d7f4e369d5892d4e3a0746f46f42bdb9dfcd4beb..779d458f4ee184034299bbddb21cace1bb578ccf 100644 (file)
 /*
  * $Id$
  */
-/**
- * \defgroup FormatDates Miscellaneous routines formating dates
- */
-/*@{*/
+
 #include "webcit.h"
 #include "webserver.h"
 
-typedef unsigned char byte; /**< a byte. */
-char *wdays[7];
-char *months[12];
+#ifdef HAVE_USELOCALE
+extern locale_t wc_locales[];
+#endif
+
+typedef unsigned char byte;
 
 #define FALSE 0 /**< no. */
 #define TRUE 1 /**< yes. */
 
-/**
- * \brief Format a date/time stamp for output 
- * \param buf the output buffer
- * \param thetime time to convert to string 
- * \param brief do we want compact view?????
+/*
+ * Wrapper around strftime() or strftime_l()
+ * depending upon how our build is configured.
+ *
+ * s           String target buffer
+ * max         Maximum size of string target buffer
+ * format      strftime() format
+ * tm          Input date/time
+ */
+size_t wc_strftime(char *s, size_t max, const char *format, const struct tm *tm)
+{
+
+#ifdef ENABLE_NLS
+#ifdef HAVE_USELOCALE
+       if (wc_locales[WC->selected_language] == NULL) {
+               return strftime(s, max, format, tm);
+       }
+       else { // TODO: this gives empty strings on debian.
+               return strftime_l(s, max, format, tm, wc_locales[WC->selected_language]);
+       }
+#else
+       return strftime(s, max, format, tm);
+#endif
+#else
+       return strftime(s, max, format, tm);
+#endif
+}
+
+
+
+/*
+ * Format a date/time stamp for output 
  */
-void fmt_date(char *buf, time_t thetime, int brief)
+void webcit_fmt_date(char *buf, time_t thetime, int brief)
 {
        struct tm tm;
        struct tm today_tm;
        time_t today_timet;
-       int hour;
-       char calhourformat[16];
-       static char *ascmonths[12] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL } ;
-
-       if (ascmonths[0] == NULL) {
-               ascmonths[0] = _("Jan");
-               ascmonths[1] = _("Feb");
-               ascmonths[2] = _("Mar");
-               ascmonths[3] = _("Apr");
-               ascmonths[4] = _("May");
-               ascmonths[5] = _("Jun");
-               ascmonths[6] = _("Jul");
-               ascmonths[7] = _("Aug");
-               ascmonths[8] = _("Sep");
-               ascmonths[9] = _("Oct");
-               ascmonths[10] = _("Nov");
-               ascmonths[11] = _("Dec");
-       };
-
-       get_preference("calhourformat", calhourformat, sizeof calhourformat);
+       int time_format;
 
+       time_format = get_time_format_cached ();
        today_timet = time(NULL);
        localtime_r(&today_timet, &today_tm);
 
        localtime_r(&thetime, &tm);
-       hour = tm.tm_hour;
-       if (hour == 0)
-               hour = 12;
-       else if (hour > 12)
-               hour = hour - 12;
-
-       buf[0] = 0;
 
        if (brief) {
 
-               /** If date == today, show only the time */
+               /* If date == today, show only the time */
                if ((tm.tm_year == today_tm.tm_year)
                  &&(tm.tm_mon == today_tm.tm_mon)
                  &&(tm.tm_mday == today_tm.tm_mday)) {
-                       if (!strcasecmp(calhourformat, "24")) {
-                               sprintf(buf, "%2d:%02d",
-                                       tm.tm_hour, tm.tm_min
-                               );
-                       }
-                       else {
-                               sprintf(buf, "%2d:%02d%s",
-                                       hour, tm.tm_min,
-                                       ((tm.tm_hour >= 12) ? "pm" : "am")
-                               );
-                       }
+                       if (time_format == WC_TIMEFORMAT_24) 
+                               wc_strftime(buf, 32, "%k:%M", &tm);
+                       else
+                               wc_strftime(buf, 32, "%l:%M%p", &tm);
                }
-
-               /** Otherwise, for messages up to 6 months old, show the
-                * month and day, and the time */
+               /* Otherwise, for messages up to 6 months old, show the month and day, and the time */
                else if (today_timet - thetime < 15552000) {
-                       if (!strcasecmp(calhourformat, "24")) {
-                               sprintf(buf, "%s %d %2d:%02d",
-                                       ascmonths[tm.tm_mon],
-                                       tm.tm_mday,
-                                       tm.tm_hour, tm.tm_min
-                               );
-                       }
-                       else {
-                               sprintf(buf, "%s %d %2d:%02d%s",
-                                       ascmonths[tm.tm_mon],
-                                       tm.tm_mday,
-                                       hour, tm.tm_min,
-                                       ((tm.tm_hour >= 12) ? "pm" : "am")
-                               );
-                       }
+                       if (time_format == WC_TIMEFORMAT_24) 
+                               wc_strftime(buf, 32, "%b %d %k:%M", &tm);
+                       else
+                               wc_strftime(buf, 32, "%b %d %l:%M%p", &tm);
                }
-
-               /** older than 6 months, show only the date */
+               /* older than 6 months, show only the date */
                else {
-                       sprintf(buf, "%s %d %d",
-                               ascmonths[tm.tm_mon],
-                               tm.tm_mday,
-                               tm.tm_year + 1900
-                       );
+                       wc_strftime(buf, 32, "%b %d %Y", &tm);
                }
        }
        else {
-               if (!strcasecmp(calhourformat, "24")) {
-                       sprintf(buf, "%s %d %d %2d:%02d",
-                               ascmonths[tm.tm_mon],
-                               tm.tm_mday,
-                               tm.tm_year + 1900,
-                               tm.tm_hour, tm.tm_min
-                       );
-               }
-               else {
-                       sprintf(buf, "%s %d %d %2d:%02d%s",
-                               ascmonths[tm.tm_mon],
-                               tm.tm_mday,
-                               tm.tm_year + 1900,
-                               hour, tm.tm_min, ((tm.tm_hour >= 12) ? "pm" : "am")
-                       );
-               }
+               if (time_format == WC_TIMEFORMAT_24)
+                       wc_strftime(buf, 32, "%a %b %d %Y %T %Z", &tm);
+               else
+                       wc_strftime(buf, 32, "%a %b %d %Y %r %Z", &tm);
        }
 }
 
 
+/*
+ * learn the users timeformat preference.
+ */
+int get_time_format_cached (void)
+{
+       long calhourformat;
+       int *time_format_cache;
+       time_format_cache = &(WC->time_format_cache);
+       if (*time_format_cache == WC_TIMEFORMAT_NONE)
+       {
+               get_pref_long("calhourformat", &calhourformat, 24);
+               if (calhourformat == 24) 
+                       *time_format_cache = WC_TIMEFORMAT_24;
+               else
+                       *time_format_cache = WC_TIMEFORMAT_AMPM;
+       }
+       return *time_format_cache;
+}
 
-/**
- * \brief Format TIME ONLY for output 
- * \param buf the output buffer
- * \param thetime time to format into buf
+/*
+ * Format TIME ONLY for output 
+ * buf         the output buffer
+ * thetime     time to format into buf
  */
 void fmt_time(char *buf, time_t thetime)
 {
        struct tm *tm;
        int hour;
-       char calhourformat[16];
-
-       get_preference("calhourformat", calhourformat, sizeof calhourformat);
-
+       int time_format;
+       
+       time_format = get_time_format_cached ();
        buf[0] = 0;
        tm = localtime(&thetime);
        hour = tm->tm_hour;
@@ -150,7 +131,7 @@ void fmt_time(char *buf, time_t thetime)
        else if (hour > 12)
                hour = hour - 12;
 
-       if (!strcasecmp(calhourformat, "24")) {
+       if (time_format == WC_TIMEFORMAT_24) {
                sprintf(buf, "%2d:%02d",
                        tm->tm_hour, tm->tm_min
                );
@@ -165,128 +146,93 @@ void fmt_time(char *buf, time_t thetime)
 
 
 
-/**
- * \brief Break down the timestamp used in HTTP headers
+/*
+ * Break down the timestamp used in HTTP headers
  * Should read rfc1123 and rfc850 dates OK
- * \todo FIXME won't read asctime
+ * FIXME won't read asctime
  * Doesn't understand timezone, but we only should be using GMT/UTC anyway
- * \param buf time to parse
- * \return the time found in buf
  */
-time_t httpdate_to_timestamp(const char *buf)
+time_t httpdate_to_timestamp(StrBuf *buf)
 {
        time_t t = 0;
        struct tm tt;
-       char *c;
-       char tz[256];
+       const char *c;
 
        /** Skip day of week, to number */
-       for (c = buf; *c != ' '; c++)
+       for (c = ChrPtr(buf); *c != ' '; c++)
                ;
        c++;
+       
+       memset(&tt, 0, sizeof(tt));
 
        /* Get day of month */
        tt.tm_mday = atoi(c);
        for (; *c != ' ' && *c != '-'; c++);
        c++;
 
-       /** Get month */
+       /* Get month */
        switch (*c) {
-       case 'A':       /** April, August */
+       case 'A':       /* April, August */
                tt.tm_mon = (c[1] == 'p') ? 3 : 7;
                break;
-       case 'D':       /** December */
+       case 'D':       /* December */
                tt.tm_mon = 11;
                break;
-       case 'F':       /** February */
+       case 'F':       /* February */
                tt.tm_mon = 1;
                break;
-       case 'M':       /** March, May */
+       case 'M':       /* March, May */
                tt.tm_mon = (c[2] == 'r') ? 2 : 4;
                break;
-       case 'J':       /** January, June, July */
+       case 'J':       /* January, June, July */
                tt.tm_mon = (c[2] == 'n') ? ((c[1] == 'a') ? 0 : 5) : 6;
                break;
-       case 'N':       /** November */
+       case 'N':       /* November */
                tt.tm_mon = 10;
                break;
-       case 'O':       /** October */
+       case 'O':       /* October */
                tt.tm_mon = 9;
                break;
-       case 'S':       /** September */
+       case 'S':       /* September */
                tt.tm_mon = 8;
                break;
        default:
                return 42;
-               break;  /** NOTREACHED */
+               break;  /* NOTREACHED */
        }
        c += 4;
 
        tt.tm_year = 0;
-       /** Get year */
+       /* Get year */
        tt.tm_year = atoi(c);
        for (; *c != ' '; c++);
        c++;
        if (tt.tm_year >= 1900)
                tt.tm_year -= 1900;
 
-       /** Get hour */
+       /* Get hour */
        tt.tm_hour = atoi(c);
        for (; *c != ':'; c++);
        c++;
 
-       /** Get minute */
+       /* Get minute */
        tt.tm_min = atoi(c);
        for (; *c != ':'; c++);
        c++;
 
-       /** Get second */
+       /* Get second */
        tt.tm_sec = atoi(c);
        for (; *c && *c != ' '; c++);
 
-       /** Got everything; let's go */
-       /** First, change to UTC */
-       if (getenv("TZ"))
-               sprintf(tz, "TZ=%s", getenv("TZ"));
-       else
-               strcpy(tz, "TZ=");
-       putenv("TZ=UTC");
+       /* Got everything; let's go.  The global 'timezone' variable contains the
+        * local timezone's offset from UTC, in seconds, so we apply that to tm_sec.
+        * This produces an illegal value for tm_sec, but mktime() will normalize
+        * it for us.  This eliminates the need to temporarily switch the environment
+        * variable TZ to UTC, which is good because it fails to switch back on
+        * some systems.
+        */
        tzset();
+       tt.tm_sec = tt.tm_sec - (int)timezone;
        t = mktime(&tt);
-       putenv(tz);
-       tzset();
        return t;
 }
-
-
-
-/**
- * /brief Initialize the strings used to display months and weekdays.
- */
-void initialize_months_and_days(void) {
-       wdays[0] = _("Sunday");
-       wdays[1] = _("Monday");
-       wdays[2] = _("Tuesday");
-       wdays[3] = _("Wednesday");
-       wdays[4] = _("Thursday");
-       wdays[5] = _("Friday");
-       wdays[6] = _("Saturday");
-
-       months[0] = _("January");
-       months[1] = _("February");
-       months[2] = _("March");
-       months[3] = _("April");
-       months[4] = _("May");
-       months[5] = _("June");
-       months[6] = _("July");
-       months[7] = _("August");
-       months[8] = _("September");
-       months[9] = _("October");
-       months[10] = _("November");
-       months[11] = _("December");
-}
-
-
-
-
-/*@}*/