inline word_t get_file_length(HANDLE fh)
{
const word_t cur = ::SetFilePointer(fh, 0, 0, FILE_CURRENT);
const word_t len = ::SetFilePointer(fh, 0, 0, FILE_END);
if (cur == INVALID_SET_FILE_POINTER || len == INVALID_SET_FILE_POINTER ||
::SetFilePointer(fh, cur, 0, FILE_BEGIN) == INVALID_SET_FILE_POINTER)
PATL_WIN32_EXCEPTION(SetFilePointer);
return len;
}
inline std::string get_temp_file_name(
const char *prefix = "TMP",
const char *path = ".")
{
char buf[MAX_PATH];
if (!::GetTempFileName(path, prefix, 0, buf))
PATL_WIN32_EXCEPTION(GetTempFileName);
return std::string(buf);
}
inline long long get_long_file_length(const char *fname)
{
WIN32_FIND_DATA data;
const HANDLE ffh = ::FindFirstFile(fname, &data);
if (ffh == INVALID_HANDLE_VALUE)
PATL_WIN32_EXCEPTION(FindFirstFile);
::FindClose(ffh);
return
static_cast<long long>(data.nFileSizeLow) |
(static_cast<long long>(data.nFileSizeHigh) << (8 * sizeof(long)));
}
inline long long get_long_file_length(HANDLE fh)
{
LONG cur_h = 0, len_h = 0;
const DWORD cur = ::SetFilePointer(fh, 0, &cur_h, FILE_CURRENT);
const DWORD len = ::SetFilePointer(fh, 0, &len_h, FILE_END);
if (cur == INVALID_SET_FILE_POINTER || len == INVALID_SET_FILE_POINTER ||
::SetFilePointer(fh, cur, &cur_h, FILE_BEGIN) == INVALID_SET_FILE_POINTER)
PATL_WIN32_EXCEPTION(SetFilePointer);
return
static_cast<long long>(len) |
(static_cast<long long>(len_h) << (8 * sizeof(long)));
}
buffered_base(const char *fname, bool isWrite)
: fh_(::CreateFile(
fname,
isWrite ? GENERIC_WRITE : GENERIC_READ,
FILE_SHARE_READ,
0,
isWrite ? CREATE_ALWAYS : OPEN_EXISTING,
FILE_FLAG_SEQUENTIAL_SCAN,
0))
, buf_(static_cast<unsigned char*>(::VirtualAlloc(
0,
BufferSize,
MEM_COMMIT,
PAGE_READWRITE)))
, end_(buf_)
, ownHandle_(true)
{
if (fh_ == INVALID_HANDLE_VALUE)
PATL_WIN32_EXCEPTION(CreateFile);
if (!buf_)
PATL_WIN32_EXCEPTION(VirtualAlloc);
}
inline void move_file(const char *from_path, const char *to_path)
{
if (!::MoveFileEx(from_path, to_path,
MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH))
PATL_WIN32_EXCEPTION(MoveFileEx);
}
inline void delete_file(const char *fname)
{
if (!::DeleteFile(fname))
PATL_WIN32_EXCEPTION(DeleteFile);
}
