78 lines
2.6 KiB
C++
78 lines
2.6 KiB
C++
// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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/// @file util.cpp
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/// @brief Windows utility methods.
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/// @ingroup libaegisub windows
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#include "../config.h"
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#include "libaegisub/util.h"
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#include "libaegisub/util_win.h"
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#include "libaegisub/charset_conv_win.h"
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namespace agi {
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namespace util {
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using agi::charset::ConvertW;
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std::string ErrorString(DWORD error) {
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LPWSTR lpstr = nullptr;
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if(FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, nullptr, error, 0, reinterpret_cast<LPWSTR>(&lpstr), 0, nullptr) == 0) {
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/// @todo Return the actual 'unknown error' string from windows.
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return "Unknown Error";
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}
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std::string str = ConvertW(lpstr);
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LocalFree(lpstr);
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return str;
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}
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/// @brief Get seconds and microseconds.
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/// @param tv[out] agi_timeval struct
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/// This code is from http://www.suacommunity.com/dictionary/gettimeofday-entry.php
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agi_timeval time_log() {
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#define DELTA_EPOCH_IN_MICROSECS 11644473600000000Ui64
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// Define a structure to receive the current Windows filetime
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FILETIME ft;
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// Initialize the present time to 0 and the timezone to UTC
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unsigned __int64 tmpres = 0;
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GetSystemTimeAsFileTime(&ft);
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// The GetSystemTimeAsFileTime returns the number of 100 nanosecond
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// intervals since Jan 1, 1601 in a structure. Copy the high bits to
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// the 64 bit tmpres, shift it left by 32 then or in the low 32 bits.
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tmpres |= ft.dwHighDateTime;
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tmpres <<= 32;
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tmpres |= ft.dwLowDateTime;
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// Convert to microseconds by dividing by 10
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tmpres /= 10;
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// The Unix epoch starts on Jan 1 1970. Need to subtract the difference
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// in seconds from Jan 1 1601.
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tmpres -= DELTA_EPOCH_IN_MICROSECS;
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// Finally change microseconds to seconds and place in the seconds value.
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// The modulus picks up the microseconds.
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agi_timeval tv = { (long)(tmpres / 1000000UL), (long)(tmpres % 1000000UL) };
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return tv;
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}
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} // namespace io
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} // namespace agi
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