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https://git.huckle.dev/Huckles-Minecraft-Archive/4jcraft.git
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restructure codebase according to vcproj filters
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182
Minecraft.World/ConsoleJavaLibs/system.cpp
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182
Minecraft.World/ConsoleJavaLibs/system.cpp
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#include "../Header Files/stdafx.h"
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#include "System.h"
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#if defined(__linux__)
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#include <sys/time.h>
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#include <time.h>
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#include <ctime>
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#endif
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template <class T>
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void System::arraycopy(arrayWithLength<T> src, unsigned int srcPos,
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arrayWithLength<T>* dst, unsigned int dstPos,
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unsigned int length) {
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assert(srcPos >= 0 && srcPos <= src.length);
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assert(srcPos + length <= src.length);
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assert(dstPos + length <= dst->length);
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std::copy(src.data + srcPos, src.data + srcPos + length,
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dst->data + dstPos);
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}
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ArrayCopyFunctionDefinition(Node*) ArrayCopyFunctionDefinition(Biome*)
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void System::arraycopy(arrayWithLength<uint8_t> src, unsigned int srcPos,
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arrayWithLength<uint8_t>* dst, unsigned int dstPos,
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unsigned int length) {
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assert(srcPos >= 0 && srcPos <= src.length);
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assert(srcPos + length <= src.length);
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assert(dstPos + length <= dst->length);
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memcpy(dst->data + dstPos, src.data + srcPos, length);
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}
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void System::arraycopy(arrayWithLength<int> src, unsigned int srcPos,
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arrayWithLength<int>* dst, unsigned int dstPos,
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unsigned int length) {
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assert(srcPos >= 0 && srcPos <= src.length);
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assert(srcPos + length <= src.length);
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assert(dstPos + length <= dst->length);
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memcpy(dst->data + dstPos, src.data + srcPos, length * sizeof(int));
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}
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// TODO 4J Stu - These time functions may suffer from accuracy and we might have
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// to use a high-resolution timer
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// Returns the current value of the most precise available system timer, in
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// nanoseconds. This method can only be used to measure elapsed time and is not
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// related to any other notion of system or wall-clock time. The value returned
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// represents nanoseconds since some fixed but arbitrary time (perhaps in the
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// future, so values may be negative). This method provides nanosecond
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// precision, but not necessarily nanosecond accuracy. No guarantees are made
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// about how frequently values change. Differences in successive calls that span
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// greater than approximately 292 years (263 nanoseconds) will not accurately
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// compute elapsed time due to numerical overflow.
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//
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// For example, to measure how long some code takes to execute:
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//
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// long startTime = System.nanoTime();
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// // ... the code being measured ...
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// long estimatedTime = System.nanoTime() - startTime;
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//
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// Returns:
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// The current value of the system timer, in nanoseconds.
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int64_t System::nanoTime() {
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#if !defined(__linux__)
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return GetTickCount() * 1000000LL;
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#else
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return static_cast<int64_t>(ts.tv_sec) * 1000000000LL + ts.tv_nsec;
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#endif
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}
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// Returns the current time in milliseconds. Note that while the unit of time of
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// the return value is a millisecond, the granularity of the value depends on
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// the underlying operating system and may be larger. For example, many
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// operating systems measure time in units of tens of milliseconds. See the
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// description of the class Date for a discussion of slight discrepancies that
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// may arise between "computer time" and coordinated universal time (UTC).
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//
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// Returns:
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// the difference, measured in milliseconds, between the current time and
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// midnight, January 1, 1970 UTC.
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int64_t System::currentTimeMillis() {
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#if defined(__linux__)
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struct timeval tv;
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gettimeofday(&tv, nullptr);
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// Convert to milliseconds since unix epoch instead of windows file time
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// time is expecting calculation to be between 10-30 ms.
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return (int64_t)tv.tv_sec * 1000LL + tv.tv_usec / 1000;
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#else
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SYSTEMTIME UTCSysTime;
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GetSystemTime(&UTCSysTime);
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// Represents as a 64-bit value the number of 100-nanosecond intervals since
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// January 1, 1601
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FILETIME UTCFileTime;
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SystemTimeToFileTime(&UTCSysTime, &UTCFileTime);
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LARGE_INTEGER li;
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li.HighPart = UTCFileTime.dwHighDateTime;
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li.LowPart = UTCFileTime.dwLowDateTime;
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return li.QuadPart / 10000;
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#endif
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}
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// 4J Stu - Added this so that we can use real-world timestamps in PSVita saves.
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// Particularly required for the save transfers to be smooth
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int64_t System::currentRealTimeMillis() { return currentTimeMillis(); }
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void System::ReverseUSHORT(unsigned short* pusVal) {
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unsigned short usValue = *pusVal;
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unsigned char* pchVal1 = (unsigned char*)pusVal;
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unsigned char* pchVal2 = (unsigned char*)&usValue;
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pchVal1[0] = pchVal2[1];
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pchVal1[1] = pchVal2[0];
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}
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void System::ReverseSHORT(short* pusVal) {
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short usValue = *pusVal;
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unsigned char* pchVal1 = (unsigned char*)pusVal;
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unsigned char* pchVal2 = (unsigned char*)&usValue;
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pchVal1[0] = pchVal2[1];
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pchVal1[1] = pchVal2[0];
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}
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void System::ReverseULONG(unsigned long* pulVal) {
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unsigned long ulValue = *pulVal;
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unsigned char* pchVal1 = (unsigned char*)pulVal;
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unsigned char* pchVal2 = (unsigned char*)&ulValue;
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pchVal1[0] = pchVal2[3];
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pchVal1[1] = pchVal2[2];
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pchVal1[2] = pchVal2[1];
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pchVal1[3] = pchVal2[0];
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}
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void System::ReverseULONG(unsigned int* pulVal) {
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unsigned int ulValue = *pulVal;
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unsigned char* pchVal1 = (unsigned char*)pulVal;
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unsigned char* pchVal2 = (unsigned char*)&ulValue;
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pchVal1[0] = pchVal2[3];
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pchVal1[1] = pchVal2[2];
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pchVal1[2] = pchVal2[1];
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pchVal1[3] = pchVal2[0];
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}
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void System::ReverseINT(int* piVal) {
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int ulValue = *piVal;
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unsigned char* pchVal1 = (unsigned char*)piVal;
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unsigned char* pchVal2 = (unsigned char*)&ulValue;
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pchVal1[0] = pchVal2[3];
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pchVal1[1] = pchVal2[2];
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pchVal1[2] = pchVal2[1];
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pchVal1[3] = pchVal2[0];
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}
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void System::ReverseULONGLONG(int64_t* pullVal) {
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int64_t ullValue = *pullVal;
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unsigned char* pchVal1 = (unsigned char*)pullVal;
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unsigned char* pchVal2 = (unsigned char*)&ullValue;
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pchVal1[0] = pchVal2[7];
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pchVal1[1] = pchVal2[6];
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pchVal1[2] = pchVal2[5];
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pchVal1[3] = pchVal2[4];
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pchVal1[4] = pchVal2[3];
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pchVal1[5] = pchVal2[2];
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pchVal1[6] = pchVal2[1];
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pchVal1[7] = pchVal2[0];
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}
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void System::ReverseWCHARA(wchar_t* pwch, int iLen) {
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for (int i = 0; i < iLen; i++) {
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ReverseUSHORT((unsigned short*)&pwch[i]);
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}
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}
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