Function watcher_windows_git_candidate

src/watcher/watcher.c:216–285

}

static bool watcher_windows_git_candidate(const wchar_t *entry, size_t entry_length,
                                          char output[CBM_SZ_4K]) {
    while (entry_length > 0U && (entry[0] == L' ' || entry[0] == L'\t')) {
        entry++;
        entry_length--;
    }
    while (entry_length > 0U &&
           (entry[entry_length - 1U] == L' ' || entry[entry_length - 1U] == L'\t')) {
        entry_length--;
    }
    if (entry_length >= 2U && entry[0] == L'"' && entry[entry_length - 1U] == L'"') {
        entry++;
        entry_length -= 2U;
    }
    while (entry_length > 0U && (entry[0] == L' ' || entry[0] == L'\t')) {
        entry++;
        entry_length--;
    }
    while (entry_length > 0U &&
           (entry[entry_length - 1U] == L' ' || entry[entry_length - 1U] == L'\t')) {
        entry_length--;
    }
    if (entry_length == 0U || entry_length >= CBM_SZ_4K) {
        return false;
    }
    wchar_t directory[CBM_SZ_4K];
    memcpy(directory, entry, entry_length * sizeof(*directory));
    directory[entry_length] = L'\0';
    if (!watcher_windows_path_absolute(directory) || wcschr(directory, L'"') != NULL) {
        return false;
    }

    bool separator = directory[entry_length - 1U] == L'\\' || directory[entry_length - 1U] == L'/';
    wchar_t candidate[CBM_SZ_4K];
    int written =
        swprintf(candidate, CBM_SZ_4K, separator ? L"%lsgit.exe" : L"%ls\\git.exe", directory);
    if (written <= 0 || written >= CBM_SZ_4K) {
        return false;
    }
    DWORD required = GetFullPathNameW(candidate, 0U, NULL, NULL);
    wchar_t *normalized =
        required > 0U ? malloc(((size_t)required + 1U) * sizeof(*normalized)) : NULL;
    DWORD normalized_length =
        normalized ? GetFullPathNameW(candidate, required + 1U, normalized, NULL) : 0U;
    if (!normalized || normalized_length == 0U || normalized_length > required ||
        !watcher_windows_path_absolute(normalized)) {
        free(normalized);
        return false;
    }
    HANDLE file = CreateFileW(normalized, GENERIC_READ | FILE_READ_ATTRIBUTES,
                              FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
                              OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT, NULL);
    BY_HANDLE_FILE_INFORMATION information;
    bool regular = file != INVALID_HANDLE_VALUE && GetFileType(file) == FILE_TYPE_DISK &&
                   GetFileInformationByHandle(file, &information) != 0 &&
                   (information.dwFileAttributes &
                    (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT)) == 0;
    if (file != INVALID_HANDLE_VALUE) {