-bool
-Path::eraseSuffix() {
- size_t dotpos = path.rfind('.',path.size());
- size_t slashpos = path.rfind('/',path.size());
- if (dotpos != std::string::npos) {
- if (slashpos == std::string::npos || dotpos > slashpos+1) {
- std::string save(path);
- path.erase(dotpos, path.size()-dotpos);
- if (!isValid()) {
- path = save;
- return false;
- }
- return true;
+error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) {
+ FileDescriptor = FD;
+ // Make sure that the requested size fits within SIZE_T.
+ if (Size > std::numeric_limits<SIZE_T>::max()) {
+ if (FileDescriptor) {
+ if (CloseFD)
+ _close(FileDescriptor);
+ } else
+ ::CloseHandle(FileHandle);
+ return make_error_code(std::errc::invalid_argument);
+ }
+
+ DWORD flprotect;
+ switch (Mode) {
+ case readonly: flprotect = PAGE_READONLY; break;
+ case readwrite: flprotect = PAGE_READWRITE; break;
+ case priv: flprotect = PAGE_WRITECOPY; break;
+ }
+
+ FileMappingHandle =
+ ::CreateFileMappingW(FileHandle, 0, flprotect,
+ (Offset + Size) >> 32,
+ (Offset + Size) & 0xffffffff,
+ 0);
+ if (FileMappingHandle == NULL) {
+ error_code ec = windows_error(GetLastError());
+ if (FileDescriptor) {
+ if (CloseFD)
+ _close(FileDescriptor);
+ } else
+ ::CloseHandle(FileHandle);
+ return ec;
+ }
+
+ DWORD dwDesiredAccess;
+ switch (Mode) {
+ case readonly: dwDesiredAccess = FILE_MAP_READ; break;
+ case readwrite: dwDesiredAccess = FILE_MAP_WRITE; break;
+ case priv: dwDesiredAccess = FILE_MAP_COPY; break;
+ }
+ Mapping = ::MapViewOfFile(FileMappingHandle,
+ dwDesiredAccess,
+ Offset >> 32,
+ Offset & 0xffffffff,
+ Size);
+ if (Mapping == NULL) {
+ error_code ec = windows_error(GetLastError());
+ ::CloseHandle(FileMappingHandle);
+ if (FileDescriptor) {
+ if (CloseFD)
+ _close(FileDescriptor);
+ } else
+ ::CloseHandle(FileHandle);
+ return ec;
+ }
+
+ if (Size == 0) {
+ MEMORY_BASIC_INFORMATION mbi;
+ SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi));
+ if (Result == 0) {
+ error_code ec = windows_error(GetLastError());
+ ::UnmapViewOfFile(Mapping);
+ ::CloseHandle(FileMappingHandle);
+ if (FileDescriptor) {
+ if (CloseFD)
+ _close(FileDescriptor);
+ } else
+ ::CloseHandle(FileHandle);
+ return ec;