1 files changed, 233 insertions, 0 deletions
diff --git a/v_windows/v/old/vlib/time/time_windows.c.v b/v_windows/v/old/vlib/time/time_windows.c.v
new file mode 100644
index 0000000..d44e6c9
--- /dev/null
+++ b/v_windows/v/old/vlib/time/time_windows.c.v
@@ -0,0 +1,233 @@
+// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+module time
+
+#include <time.h>
+// #include <sysinfoapi.h>
+
+struct C.tm {
+	tm_year int
+	tm_mon  int
+	tm_mday int
+	tm_hour int
+	tm_min  int
+	tm_sec  int
+}
+
+struct C._FILETIME {
+	dwLowDateTime  u32
+	dwHighDateTime u32
+}
+
+struct SystemTime {
+	year        u16
+	month       u16
+	day_of_week u16
+	day         u16
+	hour        u16
+	minute      u16
+	second      u16
+	millisecond u16
+}
+
+fn C.GetSystemTimeAsFileTime(lpSystemTimeAsFileTime &C._FILETIME)
+
+fn C.FileTimeToSystemTime(lpFileTime &C._FILETIME, lpSystemTime &SystemTime)
+
+fn C.SystemTimeToTzSpecificLocalTime(lpTimeZoneInformation &C.TIME_ZONE_INFORMATION, lpUniversalTime &SystemTime, lpLocalTime &SystemTime)
+
+fn C.localtime_s(t &C.time_t, tm &C.tm)
+
+const (
+	// start_time is needed on Darwin and Windows because of potential overflows
+	start_time       = init_win_time_start()
+	freq_time        = init_win_time_freq()
+	start_local_time = local_as_unix_time()
+)
+
+// in most systems, these are __quad_t, which is an i64
+struct C.timespec {
+	tv_sec  i64
+	tv_nsec i64
+}
+
+fn C._mkgmtime(&C.tm) C.time_t
+
+fn C.QueryPerformanceCounter(&u64) C.BOOL
+
+fn C.QueryPerformanceFrequency(&u64) C.BOOL
+
+fn make_unix_time(t C.tm) int {
+	return int(C._mkgmtime(&t))
+}
+
+fn init_win_time_freq() u64 {
+	f := u64(0)
+	C.QueryPerformanceFrequency(&f)
+	return f
+}
+
+fn init_win_time_start() u64 {
+	s := u64(0)
+	C.QueryPerformanceCounter(&s)
+	return s
+}
+
+// sys_mono_now returns a *monotonically increasing time*, NOT a time adjusted for daylight savings, location etc.
+pub fn sys_mono_now() u64 {
+	tm := u64(0)
+	C.QueryPerformanceCounter(&tm) // XP or later never fail
+	return (tm - time.start_time) * 1000000000 / time.freq_time
+}
+
+// NB: vpc_now is used by `v -profile` .
+// It should NOT call *any other v function*, just C functions and casts.
+[inline]
+fn vpc_now() u64 {
+	tm := u64(0)
+	C.QueryPerformanceCounter(&tm)
+	return tm
+}
+
+// local_as_unix_time returns the current local time as unix time
+fn local_as_unix_time() int {
+	t := C.time(0)
+	tm := C.localtime(&t)
+	return make_unix_time(tm)
+}
+
+// local - return the time `t`, converted to the currently active local timezone
+pub fn (t Time) local() Time {
+	st_utc := SystemTime{
+		year: u16(t.year)
+		month: u16(t.month)
+		day: u16(t.day)
+		hour: u16(t.hour)
+		minute: u16(t.minute)
+		second: u16(t.second)
+	}
+	st_local := SystemTime{}
+	C.SystemTimeToTzSpecificLocalTime(voidptr(0), &st_utc, &st_local)
+	t_local := Time{
+		year: st_local.year
+		month: st_local.month
+		day: st_local.day
+		hour: st_local.hour
+		minute: st_local.minute
+		second: st_local.second // These are the same
+		microsecond: st_local.millisecond * 1000
+		unix: u64(st_local.unix_time())
+	}
+	return t_local
+}
+
+// win_now calculates current time using winapi to get higher resolution on windows
+// GetSystemTimeAsFileTime is used and converted to local time. It can resolve time
+// down to millisecond. Other more precice methods can be implemented in the future
+fn win_now() Time {
+	ft_utc := C._FILETIME{}
+	C.GetSystemTimeAsFileTime(&ft_utc)
+	st_utc := SystemTime{}
+	C.FileTimeToSystemTime(&ft_utc, &st_utc)
+	st_local := SystemTime{}
+	C.SystemTimeToTzSpecificLocalTime(voidptr(0), &st_utc, &st_local)
+	t := Time{
+		year: st_local.year
+		month: st_local.month
+		day: st_local.day
+		hour: st_local.hour
+		minute: st_local.minute
+		second: st_local.second
+		microsecond: st_local.millisecond * 1000
+		unix: u64(st_local.unix_time())
+	}
+	return t
+}
+
+// win_utc calculates current time using winapi to get higher resolution on windows
+// GetSystemTimeAsFileTime is used. It can resolve time down to millisecond
+// other more precice methods can be implemented in the future
+fn win_utc() Time {
+	ft_utc := C._FILETIME{}
+	C.GetSystemTimeAsFileTime(&ft_utc)
+	st_utc := SystemTime{}
+	C.FileTimeToSystemTime(&ft_utc, &st_utc)
+	t := Time{
+		year: st_utc.year
+		month: st_utc.month
+		day: st_utc.day
+		hour: st_utc.hour
+		minute: st_utc.minute
+		second: st_utc.second
+		microsecond: st_utc.millisecond * 1000
+		unix: u64(st_utc.unix_time())
+	}
+	return t
+}
+
+// unix_time returns Unix time.
+pub fn (st SystemTime) unix_time() int {
+	tt := C.tm{
+		tm_sec: st.second
+		tm_min: st.minute
+		tm_hour: st.hour
+		tm_mday: st.day
+		tm_mon: st.month - 1
+		tm_year: st.year - 1900
+	}
+	return make_unix_time(tt)
+}
+
+// dummy to compile with all compilers
+pub fn darwin_now() Time {
+	return Time{}
+}
+
+// dummy to compile with all compilers
+pub fn linux_now() Time {
+	return Time{}
+}
+
+// dummy to compile with all compilers
+pub fn solaris_now() Time {
+	return Time{}
+}
+
+// dummy to compile with all compilers
+pub fn darwin_utc() Time {
+	return Time{}
+}
+
+// dummy to compile with all compilers
+pub fn linux_utc() Time {
+	return Time{}
+}
+
+// dummy to compile with all compilers
+pub fn solaris_utc() Time {
+	return Time{}
+}
+
+// dummy to compile with all compilers
+pub struct C.timeval {
+	tv_sec  u64
+	tv_usec u64
+}
+
+// sleep makes the calling thread sleep for a given duration (in nanoseconds).
+pub fn sleep(duration Duration) {
+	C.Sleep(int(duration / millisecond))
+}
+
+// some Windows system functions (e.g. `C.WaitForSingleObject()`) accept an `u32`
+// value as *timeout in milliseconds* with the special value `u32(-1)` meaning "infinite"
+pub fn (d Duration) sys_milliseconds() u32 {
+	if d >= u32(-1) * millisecond { // treat 4294967295000000 .. C.INT64_MAX as "infinite"
+		return u32(-1)
+	} else if d <= 0 {
+		return 0 // treat negative timeouts as 0 - consistent with Unix behaviour
+	} else {
+		return u32(d / millisecond)
+	}
+}