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https://github.com/jakcron/nstool
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[fnd] Added IFile interface and SimpleFile implementation.
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14
lib/libfnd/include/fnd/IFile.h
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14
lib/libfnd/include/fnd/IFile.h
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#pragma once
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#include <fnd/types.h>
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namespace fnd
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{
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class IFile
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{
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public:
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virtual size_t size() = 0;
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virtual void seek(size_t offset) = 0;
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virtual void read(byte_t* out, size_t offset, size_t len) = 0;
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virtual void write(const byte_t* out, size_t offset, size_t len) = 0;
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};
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}
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40
lib/libfnd/include/fnd/SimpleFile.h
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40
lib/libfnd/include/fnd/SimpleFile.h
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#pragma once
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#include <fnd/IFile.h>
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#include <string>
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#include <cstdio>
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namespace fnd
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{
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class SimpleFile : public IFile
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{
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public:
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enum OpenMode
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{
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Read,
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Edit,
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Create
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};
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SimpleFile();
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~SimpleFile();
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void open(const std::string& path, OpenMode mode);
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bool isOpen() const;
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void close();
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size_t size();
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void seek(size_t offset);
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size_t pos();
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void read(byte_t* out, size_t offset, size_t len);
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void write(const byte_t* out, size_t offset, size_t len);
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private:
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const std::string kModuleName = "SimpleFile";
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bool mOpen;
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OpenMode mMode;
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FILE* mFp;
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const char* getOpenModeStr(OpenMode mMode);
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};
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}
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93
lib/libfnd/source/SimpleFile.cpp
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93
lib/libfnd/source/SimpleFile.cpp
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#include <fnd/SimpleFile.h>
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using namespace fnd;
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SimpleFile::SimpleFile() :
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mOpen(false),
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mMode(Read),
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mFp(nullptr)
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{
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}
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SimpleFile::~SimpleFile()
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{
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close();
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}
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void SimpleFile::open(const std::string& path, OpenMode mode)
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{
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//close();
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mMode = mode;
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//printf("fopen(%s,%s);\n", path.c_str(), getOpenModeStr(mMode));
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mFp = fopen(path.c_str(), getOpenModeStr(mMode));
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if (mFp == nullptr)
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throw fnd::Exception(kModuleName, "Failed to open file.");
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mOpen = true;
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seek(0);
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}
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bool SimpleFile::isOpen() const
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{
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return mOpen == true && mFp != nullptr;
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}
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void SimpleFile::close()
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{
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if (isOpen())
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{
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fclose(mFp);
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}
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mFp = nullptr;
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mOpen = false;
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}
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size_t SimpleFile::size()
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{
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size_t cur_pos = pos();
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fseek(mFp, 0, SEEK_END);
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size_t fsize = pos();
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seek(cur_pos);
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return fsize;
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}
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void SimpleFile::seek(size_t offset)
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{
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fseek(mFp, offset, SEEK_SET);
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}
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size_t SimpleFile::pos()
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{
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return ftell(mFp);
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}
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void SimpleFile::read(byte_t* out, size_t offset, size_t len)
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{
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seek(offset);
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fread(out, len, 1, mFp);
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}
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void SimpleFile::write(const byte_t* out, size_t offset, size_t len)
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{
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seek(offset);
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fwrite(out, len, 1, mFp);
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}
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const char* SimpleFile::getOpenModeStr(OpenMode mode)
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{
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const char* str = "";
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switch(mode)
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{
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case (Read):
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str = "rb";
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break;
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case (Edit):
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str = "rb+";
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break;
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case (Create):
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str = "wb";
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break;
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default:
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throw fnd::Exception(kModuleName, "Unknown open mode");
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}
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return str;
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}
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