Create a branch for Aleksandar Andrejevic for his work on NTVDM. See http://jira.reactos.org/browse/CORE-7250 for more details.

svn path=/branches/ntvdm/; revision=59241
2025-08-03 14:45:53 +00:00 · 2013-06-16 22:01:41 +00:00 · 2013-06-16 22:01:41 +00:00 · 4f0b8d3db0
commit 4f0b8d3db0
parent 3e3200acef
20620 changed files with 0 additions and 1232833 deletions
--- a/lib/sdk/crt/time/gmtime.c
+++ b/lib/sdk/crt/time/gmtime.c
@ -0,0 +1,201 @@
+/*
+ * COPYRIGHT:   LGPL, See LGPL.txt in the top level directory
+ * PROJECT:     ReactOS CRT library
+ * FILE:        lib/sdk/crt/time/gmtime.c
+ * PURPOSE:     Implementation of gmtime, _gmtime32, _gmtime64
+ * PROGRAMERS:  Timo Kreuzer
+ */
+#include <precomp.h>
+
+unsigned int g_monthdays[13] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365};
+unsigned int g_lpmonthdays[13] = {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366};
+
+struct tm *
+_gmtime_worker(struct tm *ptm, __time64_t time, int do_dst)
+{
+    unsigned int days, daystoyear, dayinyear, leapdays, leapyears, years, month;
+    unsigned int secondinday, secondinhour;
+    unsigned int *padays;
+
+    if (time < 0)
+    {
+        return 0;
+    }
+
+    /* Divide into date and time */
+    days = (unsigned int)(time / SECONDSPERDAY);
+    secondinday = time % SECONDSPERDAY;
+
+    /* Shift to days from 1.1.1601 */
+    days += DIFFDAYS;
+
+    /* Calculate leap days passed till today */
+    leapdays = leapdays_passed(days);
+
+    /* Calculate number of full leap years passed */
+    leapyears = leapyears_passed(days);
+
+    /* Are more leap days passed than leap years? */
+    if (leapdays > leapyears)
+    {
+        /* Yes, we're in a leap year */
+        padays = g_lpmonthdays;
+    }
+    else
+    {
+        /* No, normal year */
+        padays = g_monthdays;
+    }
+
+    /* Calculate year */
+    years = (days - leapdays) / 365;
+    ptm->tm_year = years - 299;
+
+    /* Calculate number of days till 1.1. of this year */
+    daystoyear = years * 365 + leapyears;
+
+    /* Calculate the day in this year */
+    dayinyear = days - daystoyear;
+
+    /* Shall we do DST corrections? */
+    ptm->tm_isdst = 0;
+    if (do_dst)
+    {
+        int yeartime = dayinyear * SECONDSPERDAY + secondinday ;
+        if (yeartime >= dst_begin && yeartime <= dst_end) // FIXME! DST in winter
+        {
+            time -= _dstbias;
+            days = (unsigned int)(time / SECONDSPERDAY + DIFFDAYS);
+            dayinyear = days - daystoyear;
+            ptm->tm_isdst = 1;
+        }
+    }
+
+    ptm->tm_yday = dayinyear;
+
+    /* dayinyear < 366 => terminates with i <= 11 */
+    for (month = 0; dayinyear >= padays[month+1]; month++)
+        ;
+
+    /* Set month and day in month */
+    ptm->tm_mon = month;
+    ptm->tm_mday = 1 + dayinyear - padays[month];
+
+    /* Get weekday */
+    ptm->tm_wday = (days + 1) % 7;
+
+    /* Calculate hour and second in hour */
+    ptm->tm_hour = secondinday / SECONDSPERHOUR;
+    secondinhour = secondinday % SECONDSPERHOUR;
+
+    /* Calculate minute and second */
+    ptm->tm_min = secondinhour / 60;
+    ptm->tm_sec = secondinhour % 60;
+
+    return ptm;
+}
+
+/******************************************************************************
+ * \name _gmtime64
+ * \brief
+ * \param ptime Pointer to a variable of type __time64_t containing the time.
+ */
+struct tm *
+_gmtime64(const __time64_t * ptime)
+{
+    thread_data_t *data = msvcrt_get_thread_data();
+
+    /* Validate parameters */
+    if (!ptime || *ptime < 0)
+    {
+        return NULL;
+    }
+
+    if(!data->time_buffer)
+        data->time_buffer = malloc(sizeof(struct tm));
+
+    /* Use _gmtime_worker to do the real work */
+    return _gmtime_worker(data->time_buffer, *ptime, 0);
+}
+
+errno_t
+_gmtime64_s(
+   struct tm* ptm,
+   const __time64_t* ptime)
+{
+    __time64_t time = *ptime;
+    if (!ptm)
+    {
+        _set_errno(ERROR_BAD_COMMAND);
+        MSVCRT_INVALID_PMT("ptm == NULL");
+        return ERROR_BAD_COMMAND;
+    }
+
+    if (!ptime)
+    {
+        _set_errno(ERROR_BAD_COMMAND);
+        MSVCRT_INVALID_PMT("ptime == NULL");
+        return ERROR_BAD_COMMAND;
+    }
+
+    _gmtime_worker(ptm, time, 0);
+
+    return ERROR_SUCCESS;
+}
+
+/******************************************************************************
+ * \name _gmtime32
+ * \brief
+ * \param ptime Pointer to a variable of type __time32_t containing the time.
+ */
+struct tm *
+_gmtime32(const __time32_t * ptime)
+{
+    __time64_t time64;
+
+    if (!ptime)
+        return NULL;
+    time64 = *ptime;
+    return _gmtime64(&time64);
+}
+
+errno_t
+_gmtime32_s(
+   struct tm* ptm,
+   const __time32_t* ptime)
+{
+    __time64_t time = *ptime;
+    if (!ptm)
+    {
+        _set_errno(ERROR_BAD_COMMAND);
+        MSVCRT_INVALID_PMT("ptm == NULL");
+        return ERROR_BAD_COMMAND;
+    }
+
+    if (!ptime)
+    {
+        _set_errno(ERROR_BAD_COMMAND);
+        MSVCRT_INVALID_PMT("ptime == NULL");
+        return ERROR_BAD_COMMAND;
+    }
+
+    _gmtime_worker(ptm, time, 0);
+
+    return ERROR_SUCCESS;
+}
+
+/******************************************************************************
+ * \name gmtime
+ * \brief
+ * \param ptime Pointer to a variable of type time_t containing the time.
+ */
+struct tm *
+gmtime(const time_t * ptime)
+{
+    __time64_t time64;
+
+    if (!ptime)
+        return NULL;
+    time64 = *ptime;
+    return _gmtime64(&time64);
+}