Allow using /dev/stderr as output under GTK, per #9

flips.cpp

@@ -41,6 +41,68 @@ void FreeFileMemory(struct mem mem)
 
 
 
+class file_libc : public file {
+	size_t size;
+	FILE* io;
+	
+public:
+	static file* create(const char * filename)
+	{
+		FILE* f = fopen(filename, "rb");
+		if (!f) return NULL;
+		return new file_libc(f);
+	}
+	
+private:
+	file_libc(FILE* io) : io(io)
+	{
+		fseek(io, 0, SEEK_END);
+		size = ftell(io);
+	}
+	
+public:
+	size_t len() { return size; }
+	
+	bool read(uint8_t* target, size_t start, size_t len)
+	{
+		fseek(io, start, SEEK_SET);
+		return (fread(target, 1,len, io) == len);
+	}
+	
+	~file_libc() { fclose(io); }
+};
+file* file::create_libc(const char * filename) { return file_libc::create(filename); }
+
+
+class filewrite_libc : public filewrite {
+	FILE* io;
+	
+public:
+	static filewrite* create(const char * filename)
+	{
+		FILE* f = fopen(filename, "wb");
+		if (!f) return NULL;
+		return new filewrite_libc(f);
+	}
+	
+private:
+	filewrite_libc(FILE* io) : io(io) {}
+	
+public:
+	bool append(const uint8_t* data, size_t len)
+	{
+		return (fwrite(data, 1,len, io)==len);
+	}
+	
+	~filewrite_libc() { fclose(io); }
+};
+
+filewrite* filewrite::create_libc(const char * filename) { return filewrite_libc::create(filename); }
+
+
+
+
+
 LPWSTR GetExtension(LPCWSTR fname)
 {
 	LPWSTR ptr1=(LPWSTR)fname;