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#include <memory>
#include <vector>
#include "data.h"
#include "win.h"
template <typename T>
inline unsigned char* ValToBuf(const T& val, unsigned char* const buf)
{
memcpy(buf, &val, sizeof(val));
return buf+sizeof(val);
}
template <typename T>
inline unsigned char* BufToVal(unsigned char* const buf, T& val)
{
memcpy(&val, buf, sizeof(val));
return buf+sizeof(val);
}
DatView::DatView(const wchar_t* const filename, const size_t cb)
{
hf = CreateFile(filename, GENERIC_READ|GENERIC_WRITE,
0, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
if (hf == INVALID_HANDLE_VALUE) {
if (GetLastError() == ERROR_FILE_NOT_FOUND) {
hf = CreateFile(filename, GENERIC_READ|GENERIC_WRITE,
0, nullptr, CREATE_NEW, FILE_ATTRIBUTE_NORMAL, nullptr);
if (hf == INVALID_HANDLE_VALUE)
throw Win32Error{};
} else
throw Win32Error{};
}
LARGE_INTEGER cbMap;
cbMap.QuadPart = cb;
hm = CreateFileMapping(hf, nullptr, PAGE_READWRITE,
cbMap.HighPart, cbMap.LowPart, nullptr);
if (!hm)
throw Win32Error{};
view = MapViewOfFile(hm, FILE_MAP_ALL_ACCESS, 0, 0, 0);
if (!view)
throw Win32Error{};
}
DatView::~DatView()
{
FlushViewOfFile(view, 0);
UnmapViewOfFile(view);
CloseHandle(hm);
CloseHandle(hf);
}
unsigned char* Serialize(const ElvData& e, unsigned char* buf)
{
unsigned char version = 'a';
buf = ValToBuf(version, buf);
buf = ValToBuf(e.rating, buf);
buf = ValToBuf(e.bWatched, buf);
buf = ValToBuf(e.bTVOriginal, buf);
buf = ValToBuf(e.sRating, buf);
buf = ValToBuf(e.siEp, buf);
buf = ValToBuf(e.title, buf);
return buf;
}
unsigned char* Unserialize(ElvData& e, unsigned char* buf)
{
unsigned char version;
buf = BufToVal(buf, version);
if (version != 'a')
return nullptr;
buf = BufToVal(buf, e.rating);
buf = BufToVal(buf, e.bWatched);
buf = BufToVal(buf, e.bTVOriginal);
buf = BufToVal(buf, e.sRating);
buf = BufToVal(buf, e.siEp);
buf = BufToVal(buf, e.title);
return buf;
}
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