[PATCH 5/5] ucrtbase: Correct behavior of strftime format %c.

[Jeff Smith]

Signed-off-by: Jeff Smith <whydoubt at gmail.com>
---
 dlls/msvcrt/time.c         | 33 ++++++++++++++++++++++++---------
 dlls/ucrtbase/tests/misc.c |  4 ++--
 2 files changed, 26 insertions(+), 11 deletions(-)

diff --git a/dlls/msvcrt/time.c b/dlls/msvcrt/time.c
index c601bb0fbc..ae9e819438 100644
--- a/dlls/msvcrt/time.c
+++ b/dlls/msvcrt/time.c
@@ -1135,8 +1135,9 @@ static MSVCRT_size_t strftime_helper(char *str, MSVCRT_size_t max, const char *f
 {
     MSVCRT_size_t ret, tmp;
     BOOL alternate;
+    MSVCRT_pthreadlocinfo locinfo;
 
-    TRACE("(%p %ld %s %p %p)\n", str, max, format, mstm, time_data);
+    TRACE("(%p %ld %s %p %p %p)\n", str, max, format, mstm, time_data, loc);
 
     if(!str || !format) {
         if(str && max)
@@ -1145,8 +1146,9 @@ static MSVCRT_size_t strftime_helper(char *str, MSVCRT_size_t max, const char *f
         return 0;
     }
 
+    locinfo = loc ? loc->locinfo : get_locinfo();
     if(!time_data)
-        time_data = loc ? loc->locinfo->lc_time_curr : get_locinfo()->lc_time_curr;
+        time_data = locinfo->lc_time_curr;
 
     for(ret=0; *format && ret<max; format++) {
         if(*format != '%') {
@@ -1173,13 +1175,26 @@ static MSVCRT_size_t strftime_helper(char *str, MSVCRT_size_t max, const char *f
 
         switch(*format) {
         case 'c':
-            if(!strftime_format(str, &ret, max, mstm, time_data,
-                    alternate ? time_data->str.names.date : time_data->str.names.short_date))
-                return 0;
-            if(ret < max)
-                str[ret++] = ' ';
-            if(!strftime_format(str, &ret, max, mstm, time_data, time_data->str.names.time))
-                return 0;
+#if _MSVCR_VER>=140
+            if (!strcmp(locinfo->lc_category[MSVCRT_LC_TIME].locale, "C") && !alternate)
+            {
+                MSVCRT_size_t day_offset = ret + 8;
+                if(!strftime_format(str, &ret, max, mstm, time_data, "ddd MMM dd HH:mm:ss yyyy"))
+                    return 0;
+                if(str[day_offset] == '0')
+                    str[day_offset] = ' ';
+            }
+            else
+#endif
+            {
+                if(!strftime_format(str, &ret, max, mstm, time_data,
+                        alternate ? time_data->str.names.date : time_data->str.names.short_date))
+                    return 0;
+                if(ret < max)
+                    str[ret++] = ' ';
+                if(!strftime_format(str, &ret, max, mstm, time_data, time_data->str.names.time))
+                    return 0;
+            }
             break;
         case 'x':
             if(!strftime_format(str, &ret, max, mstm, time_data,
diff --git a/dlls/ucrtbase/tests/misc.c b/dlls/ucrtbase/tests/misc.c
index 3aca31734f..e4170faef3 100644
--- a/dlls/ucrtbase/tests/misc.c
+++ b/dlls/ucrtbase/tests/misc.c
@@ -936,8 +936,8 @@ static void test_strftime(void)
         {"%g", "72", { 0, 0, 0, 3, 0, 72, 1, 2, 0 }},
         {"%G", "1971", { 0, 0, 0, 2, 0, 72, 0, 1, 0 }},
         {"%G", "1972", { 0, 0, 0, 3, 0, 72, 1, 2, 0 }},
-        {"%c", "Thu Jan  1 00:00:00 1970", { 0, 0, 0, 1, 0, 70, 4, 0, 0 }, TRUE},
-        {"%c", "Thu Feb 30 00:00:00 1970", { 0, 0, 0, 30, 1, 70, 4, 0, 0 }, TRUE},
+        {"%c", "Thu Jan  1 00:00:00 1970", { 0, 0, 0, 1, 0, 70, 4, 0, 0 }},
+        {"%c", "Thu Feb 30 00:00:00 1970", { 0, 0, 0, 30, 1, 70, 4, 0, 0 }},
         {"%#c", "Thursday, January 01, 1970 00:00:00", { 0, 0, 0, 1, 0, 70, 4, 0, 0 }},
         {"%#c", "Thursday, February 30, 1970 00:00:00", { 0, 0, 0, 30, 1, 70, 4, 0, 0 }},
         {"%x", "01/01/70", { 0, 0, 0, 1, 0, 70, 4, 0, 0 }},
-- 
2.23.0