Piotr Caban : msvcrt: Fixed _localtime64 implementation.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: d3ecfe059960440f95ce8c25f13b4b0070952c5d
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=d3ecfe059960440f95ce8c25f13b4b0070952c5d

Author: Piotr Caban <piotr at codeweavers.com>
Date:   Mon Dec 10 12:48:07 2012 +0100

msvcrt: Fixed _localtime64 implementation.

---

 dlls/msvcrt/dir.c  |    1 -
 dlls/msvcrt/file.c |    1 -
 dlls/msvcrt/time.c |   66 ++++++++++++++++++++++++---------------------------
 3 files changed, 31 insertions(+), 37 deletions(-)

diff --git a/dlls/msvcrt/dir.c b/dlls/msvcrt/dir.c
index a504fee..82824e9 100644
--- a/dlls/msvcrt/dir.c
+++ b/dlls/msvcrt/dir.c
@@ -25,7 +25,6 @@
 #include "wine/port.h"
 
 #include <stdarg.h>
-#include <time.h>
 
 #include "windef.h"
 #include "winbase.h"
diff --git a/dlls/msvcrt/file.c b/dlls/msvcrt/file.c
index 1b87dd2..bca17d2 100644
--- a/dlls/msvcrt/file.c
+++ b/dlls/msvcrt/file.c
@@ -29,7 +29,6 @@
 #include "config.h"
 #include "wine/port.h"
 
-#include <time.h>
 #include <stdarg.h>
 #include <stdio.h>
 #ifdef HAVE_UNISTD_H
diff --git a/dlls/msvcrt/time.c b/dlls/msvcrt/time.c
index 263c035..4c21380 100644
--- a/dlls/msvcrt/time.c
+++ b/dlls/msvcrt/time.c
@@ -25,12 +25,6 @@
 #include "config.h"
 
 #include <stdlib.h>
-#define _POSIX_PTHREAD_SEMANTICS /* switch to a 2 arg style asctime_r on Solaris */
-#include <time.h>
-#ifdef HAVE_SYS_TIMES_H
-# include <sys/times.h>
-#endif
-#include <limits.h>
 
 #include "msvcrt.h"
 #include "mtdll.h"
@@ -52,20 +46,6 @@ static inline int IsLeapYear(int Year)
     return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0);
 }
 
-static inline void unix_tm_to_msvcrt( struct MSVCRT_tm *dest, const struct tm *src )
-{
-    memset( dest, 0, sizeof(*dest) );
-    dest->tm_sec   = src->tm_sec;
-    dest->tm_min   = src->tm_min;
-    dest->tm_hour  = src->tm_hour;
-    dest->tm_mday  = src->tm_mday;
-    dest->tm_mon   = src->tm_mon;
-    dest->tm_year  = src->tm_year;
-    dest->tm_wday  = src->tm_wday;
-    dest->tm_yday  = src->tm_yday;
-    dest->tm_isdst = src->tm_isdst;
-}
-
 static inline void write_invalid_msvcrt_tm( struct MSVCRT_tm *tm )
 {
     tm->tm_sec = -1;
@@ -378,32 +358,48 @@ MSVCRT___time32_t CDECL MSVCRT__mkgmtime(struct MSVCRT_tm *time)
 /*********************************************************************
  *      _localtime64_s (MSVCRT.@)
  */
-int CDECL _localtime64_s(struct MSVCRT_tm *time, const MSVCRT___time64_t *secs)
+int CDECL _localtime64_s(struct MSVCRT_tm *res, const MSVCRT___time64_t *secs)
 {
-    struct tm *tm;
-    time_t seconds;
+    int i;
+    FILETIME ft;
+    SYSTEMTIME st;
+    ULONGLONG time;
 
-    if (!time || !secs || *secs < 0 || *secs > _MAX__TIME64_T)
+    if (!res || !secs || *secs < 0 || *secs > _MAX__TIME64_T)
     {
-        if (time)
-            write_invalid_msvcrt_tm(time);
+        if (res)
+            write_invalid_msvcrt_tm(res);
 
         *MSVCRT__errno() = MSVCRT_EINVAL;
         return MSVCRT_EINVAL;
     }
 
-    seconds = *secs;
+    _tzset_init();
+    time = (*secs - MSVCRT___timezone) * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 
-    _mlock(_TIME_LOCK);
-    if (!(tm = localtime(&seconds)))
-    {
-        _munlock(_TIME_LOCK);
-        *MSVCRT__errno() = MSVCRT_EINVAL;
-        return MSVCRT_EINVAL;
+    ft.dwHighDateTime = (UINT)(time >> 32);
+    ft.dwLowDateTime  = (UINT)time;
+    FileTimeToSystemTime(&ft, &st);
+
+    res->tm_isdst = is_dst(&st) ? 1 : 0;
+    if(res->tm_isdst) {
+        time -= MSVCRT__dstbias * (ULONGLONG)TICKSPERSEC;
+        ft.dwHighDateTime = (UINT)(time >> 32);
+        ft.dwLowDateTime  = (UINT)time;
+        FileTimeToSystemTime(&ft, &st);
     }
 
-    unix_tm_to_msvcrt(time, tm);
-    _munlock(_TIME_LOCK);
+    res->tm_sec  = st.wSecond;
+    res->tm_min  = st.wMinute;
+    res->tm_hour = st.wHour;
+    res->tm_mday = st.wDay;
+    res->tm_year = st.wYear - 1900;
+    res->tm_mon  = st.wMonth - 1;
+    res->tm_wday = st.wDayOfWeek;
+    for (i = res->tm_yday = 0; i < st.wMonth - 1; i++)
+        res->tm_yday += MonthLengths[IsLeapYear(st.wYear)][i];
+    res->tm_yday += st.wDay - 1;
+
     return 0;
 }