Fix bogus logic for zic -P option.

The quick hack I added to zic to dump out currently-in-use timezone
abbreviations turns out to have a nasty bug: within each zone, it was
printing the last "struct ttinfo" to be *defined*, not necessarily the
last one in use.  This was mainly a problem in zones that had changed the
meaning of their zone abbreviation (to another GMT offset value) and later
changed it back.

As a result of this error, we'd missed out updating the tznames/ files
for some jurisdictions that have changed their zone abbreviations since
the tznames/ files were originally created.  I'll address the missing data
updates in a separate commit.

diff --git a/src/timezone/zic.c b/src/timezone/zic.c
index 2e38990323031d35328a847612db9c7181b0a8cd..13baf73d3c1c93fed205c7ac22d6aa74fe002586 100644 (file)
--- a/src/timezone/zic.c
+++ b/src/timezone/zic.c
@@ -1766,7 +1766,25 @@ writezone(const char *name, const char *string)
            if (pass == 1)
                puttzcode((long) ats[i], fp);
            else
+           {
                puttzcode64(ats[i], fp);
+
+               /* Print current timezone abbreviations if requested */
+               if (print_abbrevs &&
+                   (ats[i] >= print_cutoff || i == thistimelim - 1))
+               {
+                   unsigned char tm = typemap[types[i]];
+                   char       *thisabbrev = &thischars[indmap[abbrinds[tm]]];
+
+                   /* filter out assorted junk entries */
+                   if (strcmp(thisabbrev, GRANDPARENTED) != 0 &&
+                       strcmp(thisabbrev, "zzz") != 0)
+                       fprintf(stdout, "%s\t%ld%s\n",
+                               thisabbrev,
+                               gmtoffs[tm],
+                               isdsts[tm] ? "\tD" : "");
+               }
+           }
        for (i = thistimei; i < thistimelim; ++i)
        {
            unsigned char uc;
@@ -1783,21 +1801,6 @@ writezone(const char *name, const char *string)
                puttzcode(gmtoffs[i], fp);
                (void) putc(isdsts[i], fp);
                (void) putc((unsigned char) indmap[abbrinds[i]], fp);
-
-               /* Print current timezone abbreviations if requested */
-               if (print_abbrevs && pass == 2 &&
-                   (ats[i] >= print_cutoff || i == typecnt - 1))
-               {
-                   char       *thisabbrev = &thischars[indmap[abbrinds[i]]];
-
-                   /* filter out assorted junk entries */
-                   if (strcmp(thisabbrev, GRANDPARENTED) != 0 &&
-                       strcmp(thisabbrev, "zzz") != 0)
-                       fprintf(stdout, "%s\t%ld%s\n",
-                               thisabbrev,
-                               gmtoffs[i],
-                               isdsts[i] ? "\tD" : "");
-               }
            }
        if (thischarcnt != 0)
            (void) fwrite((void *) thischars,