From 6919b25e84760b0a4ced224df58035db6ca65b41 Mon Sep 17 00:00:00 2001
From: Laurence Withers <lwithers@amethyst.lan>
Date: Mon, 16 Oct 2006 00:33:01 +0100
Subject: [PATCH] Fix bugs, finish parser

---
 src/libiso8601/manip.c  | 4 ++++
 src/libiso8601/parser.c | 5 +++--
 src/libiso8601/print.c  | 2 +-
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/libiso8601/manip.c b/src/libiso8601/manip.c
index 0f162b2..479e5da 100644
--- a/src/libiso8601/manip.c
+++ b/src/libiso8601/manip.c
@@ -21,6 +21,10 @@ void iso8601_add_seconds(struct iso8601_date* date, long seconds)
     qr = ldiv(seconds + date->sec, 86400);
     date->day += qr.quot;
     date->sec = qr.rem;
+    if(date->sec < 0) {
+        --date->day;
+        date->sec += 86400;
+    }
 }
 
 
diff --git a/src/libiso8601/parser.c b/src/libiso8601/parser.c
index ba668b3..60b61e2 100644
--- a/src/libiso8601/parser.c
+++ b/src/libiso8601/parser.c
@@ -97,6 +97,7 @@ int iso8601_parse(const char* str, struct iso8601_date* earliest, struct iso8601
                 if(details) details->extended = 1;
                 break;
 
+            case 0:
             case 'T':
                 switch(dig) {
                 case 4:
@@ -625,8 +626,8 @@ done:
     }
     
     if(details) details->tz_sec = tz_sec;
-    if(earliest) iso8601_add_seconds(earliest, -tz_sec);
-    if(latest) iso8601_add_seconds(latest, -tz_sec);
+    if(tz_sec && earliest) iso8601_add_seconds(earliest, -tz_sec);
+    if(tz_sec && latest) iso8601_add_seconds(latest, -tz_sec);
 
     return 0;
 }
diff --git a/src/libiso8601/print.c b/src/libiso8601/print.c
index 4a35784..8b5899f 100644
--- a/src/libiso8601/print.c
+++ b/src/libiso8601/print.c
@@ -28,7 +28,7 @@ void iso8601_print(char* str, int amt, const struct iso8601_date* date,
 
     // adjust output for timezone
     dttz = *date;
-    iso8601_add_seconds(&dttz, details->tz_sec);
+    if(details->tz_sec) iso8601_add_seconds(&dttz, details->tz_sec);
 
     // determine whether or not to force extended output
     iso8601_to_cal(&y, &m, &d, &dttz);