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Implementações em stream

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This commit is contained in:
Danilo 2024-03-26 17:22:00 -03:00
parent 1613ed905f
commit c590f0dde4
3 changed files with 27 additions and 14 deletions
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33
framework/csharp/stream.hpp
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@ -11,7 +11,7 @@ namespace xna {
class Stream { class Stream {
public: public:
virtual Int Length() = 0; virtual Int Length() = 0;
virtual Long Position() = 0; virtual Long Position() = 0;
virtual void Close() = 0; virtual void Close() = 0;
virtual Long Seek(Long offset, SeekOrigin const& origin, xna_error_nullarg) = 0; virtual Long Seek(Long offset, SeekOrigin const& origin, xna_error_nullarg) = 0;
virtual Int Read(Byte* buffer, Int bufferLength, Int offset, Int count, xna_error_nullarg) = 0; virtual Int Read(Byte* buffer, Int bufferLength, Int offset, Int count, xna_error_nullarg) = 0;
@ -68,8 +68,8 @@ namespace xna {
FileStream(std::string const& path){ FileStream(std::string const& path){
int flags = std::fstream::in int flags = std::fstream::in
| std::fstream::out | std::fstream::out
| std::fstream::binary | std::fstream::binary;
| std::fstream::ate; //| std::fstream::ate;
const auto exists = std::filesystem::exists(path); const auto exists = std::filesystem::exists(path);
@ -78,24 +78,20 @@ namespace xna {
_fstream.open(path.c_str(), flags); _fstream.open(path.c_str(), flags);
if (_fstream.is_open()) { if (!_fstream.is_open())
_filesize = _fstream.tellg();
_fstream.seekg(0);
}
else {
_closed = true; _closed = true;
}
} }
~FileStream() { ~FileStream() {
Close(); Close();
} }
virtual constexpr Int Length() override { virtual Int Length() override {
if (_closed) if (_closed)
return 0; return 0;
return static_cast<Int>(_filesize); const auto end = endOfFile();
return end;
} }
virtual Long Position() override { virtual Long Position() override {
@ -124,6 +120,19 @@ namespace xna {
std::streampos _filesize{ 0 }; std::streampos _filesize{ 0 };
std::fstream _fstream; std::fstream _fstream;
bool _closed{ false }; bool _closed{ false };
Int endOfFile() {
if (_closed)
return 0;
const auto pos = _fstream.tellg();
_fstream.seekg(0, std::ios_base::end);
const auto end = _fstream.tellg();
_fstream.seekg(pos);
return static_cast<Int>(end);
}
}; };
} }

7
framework/xna.cpp
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@ -26,8 +26,11 @@ class Game1 : public Game {
}; };
int APIENTRY WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nCmdShow) { int APIENTRY WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nCmdShow) {
/*Game game; FileStream stream("D:/VS_EXPBSLN_x64_enu.CAB");
game.Run();*/ auto pos = stream.Position();
auto len = stream.Length();
pos = stream.Position();
Game1 game; Game1 game;
game.Run(); game.Run();
return 0; return 0;

1
framework/xna.h
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@ -10,5 +10,6 @@
#include "platform/window-dx.hpp" #include "platform/window-dx.hpp"
#include "platform/device-dx.hpp" #include "platform/device-dx.hpp"
#include "platform/game-dx.hpp" #include "platform/game-dx.hpp"
#include "csharp/stream.hpp"
// TODO: Reference additional headers your program requires here. // TODO: Reference additional headers your program requires here.