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author Nathan Woods <npwoods@mess.org>2016-06-26 07:54:27 -0400
committer Nathan Woods <npwoods@mess.org>2016-06-26 08:12:07 -0400
commit5009b55430ba99295c0d7a31b336c61795f6cec3 (patch)
treee1e22ab3e5ee9661e40a1549bd0030e07edb8232
parent3232bfad8909240fe18a63fe1c5090efe09bf626 (diff)
Introduced src/lib/util/timeconv.[c|h], moved code from un7z.cpp into it, and implemented win_time_point_from_filetime() in terms of it
-rw-r--r--scripts/src/lib.lua2
-rw-r--r--src/lib/util/timeconv.cpp77
-rw-r--r--src/lib/util/timeconv.h54
-rw-r--r--src/lib/util/un7z.cpp46
-rw-r--r--src/osd/windows/winutil.cpp9
5 files changed, 140 insertions, 48 deletions
diff --git a/scripts/src/lib.lua b/scripts/src/lib.lua
index 2352dd6a3a3..394fe189038 100644
--- a/scripts/src/lib.lua
+++ b/scripts/src/lib.lua
@@ -80,6 +80,8 @@ project "utils"
MAME_DIR .. "src/lib/util/sha1.cpp",
MAME_DIR .. "src/lib/util/sha1.h",
MAME_DIR .. "src/lib/util/strformat.h",
+ MAME_DIR .. "src/lib/util/timeconv.cpp",
+ MAME_DIR .. "src/lib/util/timeconv.h",
MAME_DIR .. "src/lib/util/unicode.cpp",
MAME_DIR .. "src/lib/util/unicode.h",
MAME_DIR .. "src/lib/util/unzip.cpp",
diff --git a/src/lib/util/timeconv.cpp b/src/lib/util/timeconv.cpp
new file mode 100644
index 00000000000..969c2c045af
--- /dev/null
+++ b/src/lib/util/timeconv.cpp
@@ -0,0 +1,77 @@
+// license:BSD-3-Clause
+// copyright-holders:Vas Crabb, Nathan Woods
+/*********************************************************************
+
+ timeconv.cpp
+
+ Time conversion utility code
+
+***************************************************************************/
+
+#include "timeconv.h"
+
+namespace util {
+
+/***************************************************************************
+ PROTOTYPES
+***************************************************************************/
+
+static util::ntfs_duration calculate_ntfs_offset();
+
+
+/***************************************************************************
+ GLOBAL VARIABLES
+***************************************************************************/
+
+static util::ntfs_duration s_ntfs_offset(calculate_ntfs_offset());
+
+
+/***************************************************************************
+ IMPLEMENTATION
+***************************************************************************/
+
+static util::ntfs_duration calculate_ntfs_offset()
+{
+ constexpr auto days_in_year(365);
+ constexpr auto days_in_four_years((days_in_year * 4) + 1);
+ constexpr auto days_in_century((days_in_four_years * 25) - 1);
+ constexpr auto days_in_four_centuries((days_in_century * 4) + 1);
+
+ constexpr ntfs_duration day(std::chrono::hours(24));
+ constexpr ntfs_duration year(day * days_in_year);
+ constexpr ntfs_duration four_years(day * days_in_four_years);
+ constexpr ntfs_duration century(day * days_in_century);
+ constexpr ntfs_duration four_centuries(day * days_in_four_centuries);
+
+ std::time_t const zero(0);
+ std::tm const epoch(*std::gmtime(&zero));
+
+ ntfs_duration result(day * epoch.tm_yday);
+ result += std::chrono::hours(epoch.tm_hour);
+ result += std::chrono::minutes(epoch.tm_min);
+ result += std::chrono::seconds(epoch.tm_sec);
+
+ int years(1900 - 1601 + epoch.tm_year);
+ result += four_centuries * (years / 400);
+ years %= 400;
+ result += century * (years / 100);
+ years %= 100;
+ result += four_years * (years / 4);
+ years %= 4;
+ result += year * years;
+
+ return result;
+}
+
+
+// -------------------------------------------------
+// system_clock_time_point_from_ntfs_duration
+// -------------------------------------------------
+
+std::chrono::system_clock::time_point system_clock_time_point_from_ntfs_duration(ntfs_duration d)
+{
+ return std::chrono::system_clock::from_time_t(0) + std::chrono::duration_cast<std::chrono::system_clock::duration>(d - s_ntfs_offset);
+}
+
+
+};
diff --git a/src/lib/util/timeconv.h b/src/lib/util/timeconv.h
new file mode 100644
index 00000000000..7f6e5085fd4
--- /dev/null
+++ b/src/lib/util/timeconv.h
@@ -0,0 +1,54 @@
+// license:BSD-3-Clause
+// copyright-holders:Vas Crabb, Nathan Woods
+/***************************************************************************
+
+ timeconv.h
+
+ Time conversion utility code
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef MAME_LIB_UTIL_TIMECONV_H
+#define MAME_LIB_UTIL_TIMECONV_H
+
+#include "osdcore.h"
+
+#include <chrono>
+
+
+namespace util {
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+typedef std::chrono::duration<std::uint64_t, std::ratio<1, 10000000> > ntfs_duration;
+
+
+/***************************************************************************
+ INLINE FUNCTIONS
+***************************************************************************/
+
+// -------------------------------------------------
+// ntfs_duration_from_filetime
+// -------------------------------------------------
+
+inline ntfs_duration ntfs_duration_from_filetime(std::uint32_t high, std::uint32_t low)
+{
+ return ntfs_duration((std::uint64_t(high) << 32) | std::uint64_t(low));
+}
+
+
+/***************************************************************************
+ FUNCTION PROTOTYPES
+***************************************************************************/
+
+ntfs_duration ntfs_duration_from_filetime(std::uint32_t high, std::uint32_t low);
+std::chrono::system_clock::time_point system_clock_time_point_from_ntfs_duration(ntfs_duration d);
+
+
+} // namespace util
+
+#endif // MAME_LIB_UTIL_TIMECONV_H
diff --git a/src/lib/util/un7z.cpp b/src/lib/util/un7z.cpp
index 4fee8d156d8..33a9c3f51db 100644
--- a/src/lib/util/un7z.cpp
+++ b/src/lib/util/un7z.cpp
@@ -2,7 +2,7 @@
// copyright-holders:Aaron Giles, Vas Crabb
/***************************************************************************
- un7z.c
+ un7z.cpp
Functions to manipulate data within 7z files.
@@ -14,6 +14,7 @@
#include "corestr.h"
#include "unicode.h"
+#include "timeconv.h"
#include "lzma/C/7z.h"
#include "lzma/C/7zAlloc.h"
@@ -154,8 +155,6 @@ public:
archive_file::error decompress(void *buffer, std::uint32_t length);
private:
- typedef std::chrono::duration<std::uint64_t, std::ratio<1, 10000000> > ntfs_duration;
-
m7z_file_impl(const m7z_file_impl &) = delete;
m7z_file_impl(m7z_file_impl &&) = delete;
m7z_file_impl &operator=(const m7z_file_impl &) = delete;
@@ -171,10 +170,7 @@ private:
void make_utf8_name(int index);
void set_curr_modified();
- static ntfs_duration calculate_ntfs_offset();
-
static constexpr std::size_t CACHE_SIZE = 8;
- static const ntfs_duration s_ntfs_offset;
static std::array<ptr, CACHE_SIZE> s_cache;
static std::mutex s_cache_mutex;
@@ -246,7 +242,6 @@ private:
GLOBAL VARIABLES
***************************************************************************/
-const m7z_file_impl::ntfs_duration m7z_file_impl::s_ntfs_offset(calculate_ntfs_offset());
std::array<m7z_file_impl::ptr, m7z_file_impl::CACHE_SIZE> m7z_file_impl::s_cache;
std::mutex m7z_file_impl::s_cache_mutex;
@@ -520,8 +515,8 @@ void m7z_file_impl::set_curr_modified()
if (SzBitWithVals_Check(&m_db.MTime, m_curr_file_idx))
{
CNtfsFileTime const &file_time(m_db.MTime.Vals[m_curr_file_idx]);
- ntfs_duration const ticks((std::uint64_t(file_time.High) << 32) | std::uint64_t(file_time.Low));
- m_curr_modified = std::chrono::system_clock::from_time_t(0) + (ticks - s_ntfs_offset);
+ auto ticks = ntfs_duration_from_filetime(file_time.High, file_time.Low);
+ m_curr_modified = system_clock_time_point_from_ntfs_duration(ticks);
}
else
{
@@ -530,39 +525,6 @@ void m7z_file_impl::set_curr_modified()
}
-m7z_file_impl::ntfs_duration m7z_file_impl::calculate_ntfs_offset()
-{
- constexpr auto days_in_year(365);
- constexpr auto days_in_four_years((days_in_year * 4) + 1);
- constexpr auto days_in_century((days_in_four_years * 25) - 1);
- constexpr auto days_in_four_centuries((days_in_century * 4) + 1);
-
- constexpr ntfs_duration day(std::chrono::hours(24));
- constexpr ntfs_duration year(day * days_in_year);
- constexpr ntfs_duration four_years(day * days_in_four_years);
- constexpr ntfs_duration century(day * days_in_century);
- constexpr ntfs_duration four_centuries(day * days_in_four_centuries);
-
- std::time_t const zero(0);
- std::tm const epoch(*std::gmtime(&zero));
-
- ntfs_duration result(day * epoch.tm_yday);
- result += std::chrono::hours(epoch.tm_hour);
- result += std::chrono::minutes(epoch.tm_min);
- result += std::chrono::seconds(epoch.tm_sec);
-
- int years(1900 - 1601 + epoch.tm_year);
- result += four_centuries * (years / 400);
- years %= 400;
- result += century * (years / 100);
- years %= 100;
- result += four_years * (years / 4);
- years %= 4;
- result += year * years;
-
- return result;
-}
-
} // anonymous namespace
diff --git a/src/osd/windows/winutil.cpp b/src/osd/windows/winutil.cpp
index 5be325e0fa6..23354bf0140 100644
--- a/src/osd/windows/winutil.cpp
+++ b/src/osd/windows/winutil.cpp
@@ -17,6 +17,7 @@
// MAMEOS headers
#include "winutil.h"
#include "strconv.h"
+#include "timeconv.h"
//============================================================
@@ -41,12 +42,8 @@ osd::directory::entry::entry_type win_attributes_to_entry_type(DWORD attributes)
std::chrono::system_clock::time_point win_time_point_from_filetime(LPFILETIME file_time)
{
- ULARGE_INTEGER ull;
- ull.LowPart = file_time->dwLowDateTime;
- ull.HighPart = file_time->dwHighDateTime;
-
- time_t t = ull.QuadPart / 10000000ULL - 11644473600ULL;
- return std::chrono::system_clock::from_time_t(t);
+ auto converted_file_time = util::ntfs_duration_from_filetime(file_time->dwHighDateTime, file_time->dwLowDateTime);
+ return util::system_clock_time_point_from_ntfs_duration(converted_file_time);
}