Added neimod's ctrtool

Will be base code for improvments

ctrtool/stream.h

@@ -0,0 +1,45 @@
+#ifndef __STREAM_H__
+#define __STREAM_H__
+
+#include <stdio.h>
+#include "types.h"
+
+typedef struct
+{
+	FILE* infile;
+	u32 infileposition;
+	u8* inbuffer;
+	u32 inbuffersize;
+	u32 inbufferavailable;
+	u32 inbufferpos;
+} stream_in_context;
+
+typedef struct
+{
+	FILE* outfile;
+	u8* outbuffer;
+	u32 outbuffersize;
+	u32 outbufferpos;
+} stream_out_context;
+
+// create/destroy
+void stream_in_init(stream_in_context* ctx);
+void stream_in_allocate(stream_in_context* ctx, u32 buffersize, FILE* file);
+void stream_in_destroy(stream_in_context* ctx);
+void stream_out_init(stream_out_context* ctx);
+void stream_out_allocate(stream_out_context* ctx, u32 buffersize, FILE* file);
+void stream_out_destroy(stream_out_context* ctx);
+
+// read/write operations
+int  stream_in_byte(stream_in_context* ctx, u8* byte);
+void stream_in_seek(stream_in_context* ctx, u32 position);
+void stream_in_reseek(stream_in_context* ctx);
+
+int  stream_out_byte(stream_out_context* ctx, u8 byte);
+int  stream_out_buffer(stream_out_context* ctx, const void* buffer, u32 size);
+int  stream_out_flush(stream_out_context* ctx);
+void stream_out_seek(stream_out_context* ctx, u32 position);
+void stream_out_skip(stream_out_context* ctx, u32 size);
+void stream_out_position(stream_out_context* ctx, u32* position);
+
+#endif // __STREAM_H__