[date-time] add a formatter for 0x0p+0

Defect Number:
    Reviewed By:
   Testing Done:

src/Makefile.am

@@ -54,6 +54,9 @@ TIME_FORMATS = \
     "%Y/%m/%d %H:%M:%S %z" \
     "%Y/%m/%d %H:%M:%S%z" \
     "%Y/%m/%d %H:%M" \
+    "%Y %b %d %a %H:%M:%S.%L" \
+    "%Y %b %d %H:%M:%S.%L" \
+    "%Y %b %d %H:%M:%S" \
     "%a %b %d %H:%M:%S %Y" \
     "%a %b %d %H:%M:%S.%f %Y" \
     "%a %b %d %H:%M:%S %Z %Y" \

src/lnav_util.cc

@@ -380,6 +380,26 @@ static const int year_lengths[2] = {
         366
 } ;
 
+static void secs2wday(const struct timeval &tv, struct tm *res)
+{
+    long days, rem;
+    time_t lcltime;
+
+    /* base decision about std/dst time on current time */
+    lcltime = tv.tv_sec;
+
+    days = ((long) lcltime) / SECSPERDAY;
+    rem = ((long) lcltime) % SECSPERDAY;
+    while (rem < 0) {
+        rem += SECSPERDAY;
+        --days;
+    }
+
+    /* compute day of week */
+    if ((res->tm_wday = ((EPOCH_WDAY + days) % DAYSPERWEEK)) < 0)
+        res->tm_wday += DAYSPERWEEK;
+}
+
 struct tm *secs2tm(time_t *tim_p, struct tm *res)
 {
     long days, rem;
@@ -567,6 +587,7 @@ const char *date_time_scanner::scan(const char *time_dest,
                 }
                 tv_out.tv_sec = tm2sec(&tm_out->et_tm);
                 tv_out.tv_usec = tm_out->et_nsec / 1000;
+                secs2wday(tv_out, &tm_out->et_tm);
 
                 this->dts_fmt_lock = curr_time_fmt;
                 this->dts_fmt_len  = retval - time_dest;
@@ -602,6 +623,7 @@ const char *date_time_scanner::scan(const char *time_dest,
 
                 tv_out.tv_sec = tm2sec(&tm_out->et_tm);
                 tv_out.tv_usec = tm_out->et_nsec / 1000;
+                secs2wday(tv_out, &tm_out->et_tm);
 
                 this->dts_fmt_lock = curr_time_fmt;
                 this->dts_fmt_len  = retval - time_dest;

src/ptimec.hh

@@ -172,7 +172,48 @@ inline bool ptime_b(struct exttm *dst, const char *str, off_t &off_inout, ssize_
 
 inline void ftime_a(char *dst, off_t &off_inout, ssize_t len, const struct exttm &tm)
 {
-
+    switch (tm.et_tm.tm_wday) {
+        case 0:
+            PTIME_APPEND('S');
+            PTIME_APPEND('u');
+            PTIME_APPEND('n');
+            break;
+        case 1:
+            PTIME_APPEND('M');
+            PTIME_APPEND('o');
+            PTIME_APPEND('n');
+            break;
+        case 2:
+            PTIME_APPEND('T');
+            PTIME_APPEND('u');
+            PTIME_APPEND('e');
+            break;
+        case 3:
+            PTIME_APPEND('W');
+            PTIME_APPEND('e');
+            PTIME_APPEND('d');
+            break;
+        case 4:
+            PTIME_APPEND('T');
+            PTIME_APPEND('h');
+            PTIME_APPEND('u');
+            break;
+        case 5:
+            PTIME_APPEND('F');
+            PTIME_APPEND('r');
+            PTIME_APPEND('i');
+            break;
+        case 6:
+            PTIME_APPEND('S');
+            PTIME_APPEND('a');
+            PTIME_APPEND('t');
+            break;
+        default:
+            PTIME_APPEND('X');
+            PTIME_APPEND('X');
+            PTIME_APPEND('X');
+            break;
+    }
 }
 
 inline void ftime_Z(char *dst, off_t &off_inout, ssize_t len, const struct exttm &tm)

src/ptimec_rt.cc

@@ -121,6 +121,7 @@ size_t ftime_fmt(char *dst, size_t len, const char *fmt, const struct exttm &tm)
                 case '%':
                     ftime_char(dst, off_inout, len, '%');
                     break;
+                FTIME_FMT_CASE('a', a);
                 FTIME_FMT_CASE('b', b);
                 FTIME_FMT_CASE('S', S);
                 FTIME_FMT_CASE('s', s);

test/test_date_time_scanner.cc

@@ -36,6 +36,7 @@
 #include "../src/lnav_util.hh"
 
 static const char *GOOD_TIMES[] = {
+    "2017 May 08 Mon 18:57:57.578",
     "May 01 00:00:01",
     "May 10 12:00:01",
     "2014-02-11 16:12:34",