prism/filereader.cpp at develop · CaptainDreamcast/prism · GitHub

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#include "prism/filereader.h"

#include "prism/memoryhandler.h"

namespace prism {

	typedef struct {
		Buffer b;
		BufferPointer p;

		int mIsOver;
	} MugenSpriteFileBufferReaderData;

	static void initBufferReader(FileReader* tReader, const char* tPath) {
		MugenSpriteFileBufferReaderData* data = (MugenSpriteFileBufferReaderData*)allocMemory(sizeof(MugenSpriteFileBufferReaderData));
		data->b = fileToBuffer(tPath);
		data->p = getBufferPointer(data->b);
		data->mIsOver = 0;
		tReader->mData = data;
	}

	static void deleteBufferReader(FileReader* tReader) {
		MugenSpriteFileBufferReaderData* data = (MugenSpriteFileBufferReaderData*)tReader->mData;
		freeBuffer(data->b);
		freeMemory(data);
	}

	static void readBufferReader(FileReader* tReader, void* tDst, uint32_t tSize) {
		MugenSpriteFileBufferReaderData* data = (MugenSpriteFileBufferReaderData*)tReader->mData;
		readFromBufferPointer(tDst, &data->p, tSize);
	}

	static void seekBufferReader(FileReader* tReader, uint32_t tPosition) {
		MugenSpriteFileBufferReaderData* data = (MugenSpriteFileBufferReaderData*)tReader->mData;
		data->p = ((char*)data->b.mData) + tPosition;

		if (data->p >= ((char*)data->b.mData) + data->b.mLength) {
			tReader->mSetOver(tReader);
		}
	}

	static Buffer readBufferReaderBuffer(FileReader* tReader, uint32_t tSize) {
		MugenSpriteFileBufferReaderData* data = (MugenSpriteFileBufferReaderData*)tReader->mData;
		return makeBuffer(data->p, tSize);
	}

	static uint32_t getCurrentBufferReaderOffset(FileReader* tReader) {
		MugenSpriteFileBufferReaderData* data = (MugenSpriteFileBufferReaderData*)tReader->mData;
		return (uint32_t)(data->p - ((char*)data->b.mData));
	}

	static void setBufferReaderOver(FileReader* tReader) {
		MugenSpriteFileBufferReaderData* data = (MugenSpriteFileBufferReaderData*)tReader->mData;
		data->p = NULL;
		data->mIsOver = 1;
	}

	static int isBufferReaderOver(FileReader* tReader) {
		MugenSpriteFileBufferReaderData* data = (MugenSpriteFileBufferReaderData*)tReader->mData;
		return data->mIsOver;
	}

	FileReader getBufferFileReader() {
		FileReader ret;
		ret.mType = FILE_READER_TYPE_BUFFER;
		ret.mInit = initBufferReader;
		ret.mRead = readBufferReader;
		ret.mReadBufferReadOnly = readBufferReaderBuffer;
		ret.mSeek = seekBufferReader;
		ret.mGetCurrentOffset = getCurrentBufferReaderOffset;
		ret.mDelete = deleteBufferReader;
		ret.mSetOver = setBufferReaderOver;
		ret.mIsOver = isBufferReaderOver;
		return ret;
	}

	typedef struct {
		FileHandler mFile;
		uint32_t mFileSize;
		int mIsOver;
	} MugenSpriteFileFileReaderData;

	static void initFileReader(FileReader* tReader, const char* tPath) {
		MugenSpriteFileFileReaderData* data = (MugenSpriteFileFileReaderData*)allocMemory(sizeof(MugenSpriteFileFileReaderData));
		data->mFile = fileOpen(tPath, O_RDONLY);
		data->mFileSize = uint32_t(fileTotal(data->mFile));
		data->mIsOver = 0;
		tReader->mData = data;
	}

	static void deleteFileReader(FileReader* tReader) {
		MugenSpriteFileFileReaderData* data = (MugenSpriteFileFileReaderData*)tReader->mData;
		fileClose(data->mFile);
		freeMemory(data);
	}

	static void readFileReader(FileReader* tReader, void* tDst, uint32_t tSize) {
		MugenSpriteFileFileReaderData* data = (MugenSpriteFileFileReaderData*)tReader->mData;

		fileRead(data->mFile, tDst, tSize);
	}

	static void seekFileReader(FileReader* tReader, uint32_t tPosition) {
		MugenSpriteFileFileReaderData* data = (MugenSpriteFileFileReaderData*)tReader->mData;

		fileSeek(data->mFile, tPosition, SEEK_SET);
		uint32_t position = tReader->mGetCurrentOffset(tReader);

		if (position >= data->mFileSize) {
			tReader->mSetOver(tReader);
		}
	}

	static Buffer readFileReaderBuffer(FileReader* tReader, uint32_t tSize) {
		(void)tReader;
		uint32_t originalPosition = tReader->mGetCurrentOffset(tReader);
		char* dst = (char*)allocMemory(tSize + 10);
		tReader->mRead(tReader, dst, tSize);

		tReader->mSeek(tReader, originalPosition);

		return makeBufferOwned(dst, tSize);
	}

	static uint32_t getCurrentFileReaderOffset(FileReader* tReader) {
		MugenSpriteFileFileReaderData* data = (MugenSpriteFileFileReaderData*)tReader->mData;

		return (uint32_t)fileTell(data->mFile);
	}

	static void setFileReaderOver(FileReader* tReader) {
		MugenSpriteFileFileReaderData* data = (MugenSpriteFileFileReaderData*)tReader->mData;
		data->mIsOver = 1;
	}

	static int isFileReaderOver(FileReader* tReader) {
		MugenSpriteFileFileReaderData* data = (MugenSpriteFileFileReaderData*)tReader->mData;
		return data->mIsOver;
	}

	FileReader getFileFileReader() {
		FileReader ret;
		ret.mType = FILE_READER_TYPE_FILE;
		ret.mInit = initFileReader;
		ret.mRead = readFileReader;
		ret.mReadBufferReadOnly = readFileReaderBuffer;
		ret.mSeek = seekFileReader;
		ret.mGetCurrentOffset = getCurrentFileReaderOffset;
		ret.mDelete = deleteFileReader;
		ret.mSetOver = setFileReaderOver;
		ret.mIsOver = isFileReaderOver;
		return ret;
	}

	void initBufferFileReaderReadOnlyBuffer(FileReader* tReader, const Buffer& tBuffer) {
		MugenSpriteFileBufferReaderData* data = (MugenSpriteFileBufferReaderData*)allocMemory(sizeof(MugenSpriteFileBufferReaderData));
		data->b = tBuffer;
		data->p = getBufferPointer(data->b);
		data->mIsOver = 0;
		tReader->mData = data;
	}

}