Added neimod's ctrtool

Will be base code for improvments

ctrtool/stream.c

@@ -0,0 +1,138 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+#include "types.h"
+#include "stream.h"
+
+
+void stream_in_init(stream_in_context* ctx)
+{
+	memset(ctx, 0, sizeof(stream_in_context));
+}
+
+void stream_out_init(stream_out_context* ctx)
+{
+	memset(ctx, 0, sizeof(stream_out_context));
+}
+
+void stream_in_allocate(stream_in_context* ctx, u32 buffersize, FILE* file)
+{
+	ctx->inbuffer = malloc(buffersize);
+	ctx->inbuffersize = buffersize;
+	ctx->infile = file;
+	ctx->infileposition = 0;
+}
+
+void stream_out_allocate(stream_out_context* ctx, u32 buffersize, FILE* file)
+{
+	ctx->outbuffer = malloc(buffersize);
+	ctx->outbuffersize = buffersize;
+	ctx->outfile = file;
+}
+
+void stream_in_destroy(stream_in_context* ctx)
+{
+	free(ctx->inbuffer);
+	ctx->inbuffer = 0;
+}
+
+void stream_out_destroy(stream_out_context* ctx)
+{
+	free(ctx->outbuffer);
+	ctx->outbuffer = 0;
+}
+
+int stream_in_byte(stream_in_context* ctx, u8* byte)
+{
+	if (ctx->inbufferpos >= ctx->inbufferavailable)
+	{
+		size_t readbytes = fread(ctx->inbuffer, 1, ctx->inbuffersize, ctx->infile);
+		if (readbytes <= 0)
+			return 0;
+
+		ctx->inbufferavailable = readbytes;
+		ctx->inbufferpos = 0;
+		ctx->infileposition += readbytes;
+	}
+
+	*byte = ctx->inbuffer[ctx->inbufferpos++];
+	return 1;
+}
+
+void stream_in_seek(stream_in_context* ctx, u32 position)
+{
+	fseek(ctx->infile, position, SEEK_SET);
+	ctx->infileposition = position;
+	ctx->inbufferpos = 0;
+	ctx->inbufferavailable = 0;
+}
+
+void stream_in_reseek(stream_in_context* ctx)
+{
+	fseek(ctx->infile, ctx->infileposition, SEEK_SET);
+}
+
+
+void stream_out_seek(stream_out_context* ctx, u32 position)
+{
+	stream_out_flush(ctx);
+
+	fseek(ctx->outfile, position, SEEK_SET);
+}
+
+void stream_out_skip(stream_out_context* ctx, u32 size)
+{
+	stream_out_flush(ctx);
+
+	fseek(ctx->outfile, size, SEEK_CUR);
+}
+
+int stream_out_byte(stream_out_context* ctx, u8 byte)
+{
+	if (ctx->outbufferpos >= ctx->outbuffersize)
+	{
+		if (stream_out_flush(ctx) == 0)
+			return 0;
+	}
+
+	ctx->outbuffer[ctx->outbufferpos++] = byte;
+	return 1;
+}
+
+int stream_out_buffer(stream_out_context* ctx, const void* buffer, u32 size)
+{
+	u32 i;
+
+	for(i=0; i<size; i++)
+	{
+		if (!stream_out_byte(ctx, ((u8*)buffer)[i]))
+			return 0;
+	}
+
+	return 1;
+}
+
+int stream_out_flush(stream_out_context* ctx)
+{
+	if (ctx->outbufferpos > 0)
+	{
+		size_t writtenbytes = fwrite(ctx->outbuffer, 1, ctx->outbufferpos, ctx->outfile);
+		if (writtenbytes < 0)
+			return 0;
+
+
+		ctx->outbufferpos = 0;
+	}
+	return 1;
+}
+
+void stream_out_position(stream_out_context* ctx, u32* position)
+{
+	stream_out_flush(ctx);
+
+	*position = ftell(ctx->outfile);
+}
+
+