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/*
* Copyright (C) 2015 by Multi-Tech Systems
*
* This file is part of libmts.
*
* libmts is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* libmts is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libmts. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <mts/MTS_System.h>
#include <fstream>
#include <sstream>
#include <cassert>
#ifdef WIN32
#include <windows.h>
//WIN32: FILETIME structure has a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601.
static int64_t getEpochTimeMicros() {
const SYSTEMTIME EPOCH = {1970, 1, 4, 1, 0, 0, 0, 0};
FILETIME ft;
BOOL ok = SystemTimeToFileTime(&EPOCH, &ft);
assert(ok);
int64_t epochTimeMicros = ((static_cast<uint64_t>(ft.dwHighDateTime) << 32) | ft.dwLowDateTime) / 10;
return epochTimeMicros;
}
static int64_t getSystemTimeMicros() {
SYSTEMTIME st;
GetSystemTime(&st);
FILETIME ft;
BOOL ok = SystemTimeToFileTime(&st, &ft);
assert(ok);
int64_t systemTimeMicros = ((static_cast<uint64_t>(ft.dwHighDateTime) << 32) | ft.dwLowDateTime) / 10;
return systemTimeMicros;
}
static int64_t getClockFrequency() {
LARGE_INTEGER freq;
BOOL ok = QueryPerformanceFrequency(&freq);
assert(ok);
return freq.QuadPart;
}
static int64_t getClockValue() {
LARGE_INTEGER value;
BOOL ok = QueryPerformanceCounter(&value);
assert(ok);
return value.QuadPart;
}
#else
#include <time.h>
#endif
using namespace MTS;
uint64_t System::timeMicros() {
int64_t micros = 0;
#ifdef WIN32
static const int64_t EPOCH_TIME_MICROS = getEpochTimeMicros();
micros = getSystemTimeMicros() - EPOCH_TIME_MICROS;
#else
timespec ts;
int result = clock_gettime(CLOCK_REALTIME, &ts);
if (result == 0) {
micros = (static_cast<int64_t>(ts.tv_sec) * 1000000)
+ (ts.tv_nsec / 1000);
}
#endif
return micros;
}
uint64_t System::precisionTimeMicros() {
int64_t micros = 0;
#ifdef WIN32
static const double TO_MICROS = 1000000.0 / getClockFrequency();
int64_t value = getClockValue();
micros = static_cast<int64_t>(value * TO_MICROS);
#else
micros = timeMicros();
#endif
return micros;
}
bool System::isBigEndian() {
static union {
uint32_t i;
char c[4];
} endian = { 0x01020304 };
return endian.c[0] == 1;
}
void System::swapBytes(uint8_t* const pBuffer, const uint32_t iSize) {
if (iSize > 1 && pBuffer != 0) {
uint8_t cByte = 0;
uint32_t i;
uint32_t j;
for (i = 0, j = iSize - 1; i < j; i++, j--) {
cByte = pBuffer[i];
pBuffer[i] = pBuffer[j];
pBuffer[j] = cByte;
}
}
}
int32_t System::cmd(const std::string& cmd, std::string& result) {
std::string output;
FILE * stream;
const int max_buffer = 256;
char buffer[max_buffer];
int32_t code = -1;
stream = popen(cmd.c_str(), "r");
if (stream) {
while (!feof(stream))
if (fgets(buffer, max_buffer, stream) != NULL)
output.append(buffer);
code = pclose(stream);
}
result = output;
return code;
}
int32_t System::readFile(const std::string& path, std::string& result) {
std::ifstream infile(path.c_str());
std::stringstream ss;
if (!infile.is_open()) {
return -1;
}
ss << infile.rdbuf();
infile.close();
result = ss.str();
return 0;
}
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