78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
#ifndef __MAPPED_FILE__
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#define __MAPPED_FILE__
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#include <stdint.h>
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#include <cstdlib>
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namespace ProFUSE {
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enum {
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LittleEndian = 0x3412,
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BigEndian = 0x1234
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};
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class MappedFile {
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public:
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MappedFile(const char *name, bool ReadOnly);
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MappedFile(int fd, bool readOnly);
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MappedFile(const char *name, size_t size);
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~MappedFile();
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void readBlock(unsigned block, void *bp);
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void writeBlock(unsigned block, const void *bp);
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void sync();
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void reset();
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bool dosOrder() const { return _dosOrder; }
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void setDosOrder(bool tf) { _dosOrder = tf; }
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unsigned offset() const { return _offset; }
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void setOffset(unsigned o) { _offset = o; }
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unsigned blocks() const { return _blocks; }
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void setBlocks(unsigned b) { _blocks = b; }
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bool readOnly() const { return _readOnly; }
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size_t fileSize() const { return _size; }
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void *fileData() const { return _map; }
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uint8_t read8(size_t location) const
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{
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return ((uint8_t *)_map)[location];
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}
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uint16_t read16(size_t location, int byteOrder) const;
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uint32_t read32(size_t location, int byteOrder) const;
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void write8(size_t location, uint8_t data)
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{
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((uint8_t *)_map)[location] = data;
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}
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void write16(size_t location, uint16_t data, int byteOrder);
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void write32(size_t location, uint32_t data, int byteOrder);
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private:
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MappedFile& operator=(const MappedFile& other);
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void init(int fd, bool readOnly);
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static const unsigned DOSMap[];
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int _fd;
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void *_map;
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size_t _size;
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bool _readOnly;
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bool _dosOrder;
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unsigned _offset;
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unsigned _blocks;
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};
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}
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#endif |