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#include "JSystem/JSystem.h" // IWYU pragma: keep
#include "JSystem/JSupport/JSUMemoryStream.h"
#include <cstring>
void JSUMemoryInputStream::setBuffer(void const* pBuffer, s32 length) {
mBuffer = pBuffer;
mLength = length;
mPosition = 0;
}
u32 JSUMemoryInputStream::readData(void* pData, s32 length) {
if (mPosition + length > mLength) {
length = mLength - mPosition;
}
if (length > 0) {
memcpy(pData, (void*)((s32)mBuffer + mPosition), length);
mPosition += length;
}
return length;
}
s32 JSUMemoryInputStream::seekPos(s32 pos, JSUStreamSeekFrom seekFrom) {
s32 oldPos = mPosition;
switch (seekFrom) {
case JSUStreamSeekFrom_SET:
mPosition = pos;
break;
case JSUStreamSeekFrom_END:
mPosition = mLength - pos;
break;
case JSUStreamSeekFrom_CUR:
mPosition += pos;
break;
}
if (mPosition < 0) {
mPosition = 0;
}
if (mPosition > mLength) {
mPosition = mLength;
}
return mPosition - oldPos;
}
s32 JSUMemoryInputStream::getLength() const {
return mLength;
}
s32 JSUMemoryInputStream::getPosition() const {
return mPosition;
}
void JSUMemoryOutputStream::setBuffer(void* pBuffer, s32 length) {
mBuffer = pBuffer;
mLength = length;
mPosition = 0;
}
s32 JSUMemoryOutputStream::writeData(const void* pData, s32 length) {
if (mPosition + length > mLength) {
length = mLength - mPosition;
}
if (length > 0) {
memcpy((void*)((s32)mBuffer + mPosition), pData, length);
mPosition += length;
}
return length;
}
s32 JSUMemoryOutputStream::seekPos(s32 pos, JSUStreamSeekFrom seekFrom) {
s32 oldPos = mPosition;
switch (seekFrom) {
case JSUStreamSeekFrom_SET:
mPosition = pos;
break;
case JSUStreamSeekFrom_END:
mPosition = mLength - pos;
break;
case JSUStreamSeekFrom_CUR:
mPosition += pos;
break;
}
if (mPosition < 0) {
mPosition = 0;
}
if (mPosition > mLength) {
mPosition = mLength;
}
return mPosition - oldPos;
}
s32 JSUMemoryOutputStream::getLength() const {
return mLength;
}
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