diff options
Diffstat (limited to 'c/data.cpp')
| -rw-r--r-- | c/data.cpp | 36 |
1 files changed, 36 insertions, 0 deletions
@@ -1,6 +1,8 @@ #include <memory> +#include <vector> #include "data.h" +#include "win.h" template <typename T> inline unsigned char* ValToBuf(const T& val, unsigned char* const buf) @@ -16,6 +18,40 @@ inline unsigned char* BufToVal(unsigned char* const buf, T& 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'; |