98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
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#include "stdinc.h"
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#include "debmacro.h"
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#include "util.h"
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//
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// used by tools\copy_bigpath and tools\mkdir_bigpath
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//
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BOOL
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FusionpConvertToBigPath(PCWSTR Path, SIZE_T BufferSize, PWSTR Buffer)
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{
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FN_PROLOG_WIN32
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SIZE_T i = 0;
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SIZE_T j = 0;
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PWSTR FilePart = NULL;
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BOOL Unc = FALSE;
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PARAMETER_CHECK(Path != NULL);
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PARAMETER_CHECK(Path[0] != 0);
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PARAMETER_CHECK(Buffer != NULL);
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PARAMETER_CHECK(BufferSize != 0);
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if (FusionpIsPathSeparator(Path[0])
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&& FusionpIsPathSeparator(Path[1])
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&& Path[2] == '?')
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{
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i = 1 + ::wcslen(Path);
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if (i >= BufferSize)
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{
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::FusionpSetLastWin32Error(ERROR_BUFFER_OVERFLOW);
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goto Exit;
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}
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CopyMemory(Buffer, Path, i * sizeof(WCHAR));
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FN_SUCCESSFUL_EXIT();
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}
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else if (FusionpIsPathSeparator(Path[0])
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&& FusionpIsPathSeparator(Path[1])
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)
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{
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Unc = TRUE;
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if (BufferSize <= NUMBER_OF(L"\\\\?\\UN\\m\\s"))
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{
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ORIGINATE_WIN32_FAILURE_AND_EXIT(BufferTooSmall, ERROR_BUFFER_OVERFLOW);
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}
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::wcscpy(Buffer, L"\\\\?\\UN");
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}
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else
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{
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Unc = FALSE;
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if (BufferSize <= NUMBER_OF(L"\\\\?\\c:\\"))
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{
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ORIGINATE_WIN32_FAILURE_AND_EXIT(BufferTooSmall, ERROR_BUFFER_OVERFLOW);
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}
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::wcscpy(Buffer, L"\\\\?\\");
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}
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i = ::wcslen(Buffer);
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IFW32FALSE_ORIGINATE_AND_EXIT((j = GetFullPathNameW(Path, static_cast<ULONG>(BufferSize - i), Buffer + i, &FilePart)));
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if ((j + i + 1) >= BufferSize)
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{
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ORIGINATE_WIN32_FAILURE_AND_EXIT(BufferTooSmall, ERROR_BUFFER_OVERFLOW);
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}
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if (Unc)
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Buffer[i] = 'C';
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FN_EPILOG
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}
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BOOL
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FusionpSkipBigPathRoot(PCWSTR s, OUT SIZE_T* RootLengthOut)
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{
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FN_PROLOG_WIN32
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SIZE_T i = 0;
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PARAMETER_CHECK(s != NULL);
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PARAMETER_CHECK(s[0] != 0);
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PARAMETER_CHECK(memcmp(s, L"\\\\?\\", sizeof(L"\\\\?\\") - sizeof(WCHAR)) == 0);
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PARAMETER_CHECK(RootLengthOut != NULL);
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if (s[NUMBER_OF(L"\\\\?\\c:") - 2] == ':')
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{
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i += NUMBER_OF(L"\\\\?\\c:\\") - 2;
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i += wcsspn(s + i, L"\\/");
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}
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else
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{
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i += NUMBER_OF(L"\\\\?\\unc\\") - 1;
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i += wcsspn(s + i, L"\\/"); // skip "\\"
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i += wcscspn(s + i, L"\\/"); // skip "\\computer"
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i += wcsspn(s + i, L"\\/"); // skip "\\computer\"
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i += wcscspn(s + i, L"\\/"); // skip "\\computer\share"
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i += wcsspn(s + i, L"\\/"); // skip "\\computer\share\"
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}
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*RootLengthOut += i;
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FN_EPILOG
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}
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