Add NintendoObject class for NRO/NSO binary format

Makefile

@@ -2,6 +2,8 @@ CXX				:= g++
 SRC_FILES := $(wildcard *.cpp)
 OBJ_FILES := $(SRC_FILES:.cpp=.o)
 CXX_FLAGS	:= -Iinclude
+LD_FLAGS	:= -llz4
+
 all: nsemu
 nsemu: $(OBJ_FILES)
 	$(CXX) -o nsemu $(LD_FLAGS) $(OBJ_FILES)

NintendoObject.cpp

@@ -0,0 +1,27 @@
+#include "Nsemu.hpp"
+#include <lz4.h>
+
+NintendoObject::NintendoObject(string path) {
+	fp.open(path, ios::in | ios::binary);
+	fp.seekg(0, ios_base::end);
+	length = (uint32_t) fp.tellg();
+	fp.seekg(0);
+}
+
+char *decompress(ifstream &fp, uint32_t offset, uint32_t csize, uint32_t usize) {
+	fp.seekg(offset);
+	char *buf = new char[csize];
+	char *obuf = new char[usize];
+	fp.read(buf, csize);
+	assert(LZ4_decompress_safe(buf, obuf, csize, usize) == usize);
+	delete[] buf;
+	return obuf;
+}
+
+int Nso::load (Nsemu *nsemu, uint64_t *base) {
+
+}
+
+int Nro::load (Nsemu *nsemu, uint64_t *base) {
+  
+}

include/NintendoObject.hpp

@@ -0,0 +1,35 @@
+#ifndef _NINTENDO_OBJECT_HPP
+#define _NINTENDO_OBJECT_HPP
+
+class Nsemu;
+class NintendoObject {
+public:
+  NintendoObject(std::string path);
+  ~NintendoObject() {}
+  virtual int load (Nsemu *nsemu, uint64_t *base) = 0;
+protected:
+  std::ifstream fp;
+  uint32_t length;
+};
+
+class Nso : NintendoObject {
+public:
+  Nso(std::string path) : NintendoObject(path) {}
+  int load (Nsemu *nsemu, uint64_t *base);
+};
+
+typedef struct {
+	uint32_t magic, pad0, pad1, pad2;
+	uint32_t textOff, textLoc, textSize, pad3;
+	uint32_t rdataOff, rdataLoc, rdataSize, pad4;
+	uint32_t dataOff, dataLoc, dataSize;
+	uint32_t bssSize;
+} NsoHeader;
+
+class Nro : NintendoObject {
+public:
+  Nro(std::string path) : NintendoObject(path) {}
+  int load (Nsemu *nsemu, uint64_t *base);
+};
+
+#endif

include/Nsemu.hpp

@@ -0,0 +1,19 @@
+#ifndef _NSEMU_HPP
+#define _NSEMU_HPP
+
+#include <stdint.h>
+#include <cassert>
+#include <cstdlib>
+#include <fstream>
+#include <iostream>
+#include <string>
+#include <vector>
+using namespace std;
+
+#include "NintendoObject.hpp"
+
+class Nsemu {
+public:
+  Nsemu();
+};
+#endif

main.cpp

@@ -1,6 +1,4 @@
-#include <cstdlib>
-#include <iostream>
-#include <vector>
+#include "Nsemu.hpp"
 #include "optionparser.h"
 using namespace std;
 struct Arg: public option::Arg