1 files changed, 151 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6pre/gme/Data_Reader.h b/plugins/gme/game-music-emu-0.6pre/gme/Data_Reader.h
new file mode 100644
index 00000000..acf571f6
--- /dev/null
+++ b/plugins/gme/game-music-emu-0.6pre/gme/Data_Reader.h
@@ -0,0 +1,151 @@
+// Data reader interface for uniform access
+
+// File_Extractor 0.4.0
+#ifndef DATA_READER_H
+#define DATA_READER_H
+
+#include "blargg_common.h"
+
+// Supports reading and finding out how many bytes are remaining
+class Data_Reader {
+public:
+	virtual ~Data_Reader() { }
+	
+	static const char eof_error []; // returned by read() when request goes beyond end
+	
+	// Read at most count bytes and return number actually read, or <= 0 if error
+	virtual long read_avail( void*, long n ) = 0;
+	
+	// Read exactly count bytes and return error if they couldn't be read
+	virtual blargg_err_t read( void*, long count );
+	
+	// Number of bytes remaining until end of file
+	virtual long remain() const = 0;
+	
+	// Read and discard count bytes
+	virtual blargg_err_t skip( long count );
+	
+public:
+	Data_Reader() { }
+	typedef blargg_err_t error_t; // deprecated
+private:
+	// noncopyable
+	Data_Reader( const Data_Reader& );
+	Data_Reader& operator = ( const Data_Reader& );
+};
+
+// Supports seeking in addition to Data_Reader operations
+class File_Reader : public Data_Reader {
+public:
+	// Size of file
+	virtual long size() const = 0;
+	
+	// Current position in file
+	virtual long tell() const = 0;
+	
+	// Go to new position
+	virtual blargg_err_t seek( long ) = 0;
+	
+	long remain() const;
+	blargg_err_t skip( long n );
+};
+
+// Disk file reader
+class Std_File_Reader : public File_Reader {
+public:
+	blargg_err_t open( const char* path );
+	void close();
+	
+public:
+	Std_File_Reader();
+	~Std_File_Reader();
+	long size() const;
+	blargg_err_t read( void*, long );
+	long read_avail( void*, long );
+	long tell() const;
+	blargg_err_t seek( long );
+private:
+	void* file_;
+};
+
+// Treats range of memory as a file
+class Mem_File_Reader : public File_Reader {
+public:
+	Mem_File_Reader( const void*, long size );
+	
+public:
+	long size() const;
+	long read_avail( void*, long );
+	long tell() const;
+	blargg_err_t seek( long );
+private:
+	const char* const begin;
+	const long size_;
+	long pos;
+};
+
+// Makes it look like there are only count bytes remaining
+class Subset_Reader : public Data_Reader {
+public:
+	Subset_Reader( Data_Reader*, long count );
+
+public:
+	long remain() const;
+	long read_avail( void*, long );
+private:
+	Data_Reader* in;
+	long remain_;
+};
+
+// Joins already-read header and remaining data into original file (to avoid seeking)
+class Remaining_Reader : public Data_Reader {
+public:
+	Remaining_Reader( void const* header, long size, Data_Reader* );
+
+public:
+	long remain() const;
+	long read_avail( void*, long );
+	blargg_err_t read( void*, long );
+private:
+	char const* header;
+	char const* header_end;
+	Data_Reader* in;
+	long read_first( void* out, long count );
+};
+
+// Invokes callback function to read data. Size of data must be specified in advance.
+class Callback_Reader : public Data_Reader {
+public:
+	typedef const char* (*callback_t)( void* data, void* out, int count );
+	Callback_Reader( callback_t, long size, void* data = 0 );
+public:
+	long read_avail( void*, long );
+	blargg_err_t read( void*, long );
+	long remain() const;
+private:
+	callback_t const callback;
+	void* const data;
+	long remain_;
+};
+
+#ifdef HAVE_ZLIB_H
+// Gzip compressed file reader
+class Gzip_File_Reader : public File_Reader {
+public:
+	blargg_err_t open( const char* path );
+	void close();
+	
+public:
+	Gzip_File_Reader();
+	~Gzip_File_Reader();
+	long size() const;
+	long read_avail( void*, long );
+	long tell() const;
+	blargg_err_t seek( long );
+private:
+	void* file_;
+	long size_;
+};
+#endif
+
+#endif