diff options
Diffstat (limited to 'src/win32/w32_util.c')
-rw-r--r-- | src/win32/w32_util.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/win32/w32_util.c b/src/win32/w32_util.c new file mode 100644 index 000000000..2e52525d5 --- /dev/null +++ b/src/win32/w32_util.c @@ -0,0 +1,139 @@ +/* + * Copyright (C) the libgit2 contributors. All rights reserved. + * + * This file is part of libgit2, distributed under the GNU GPL v2 with + * a Linking Exception. For full terms see the included COPYING file. + */ + +#include "w32_util.h" + +/** + * Creates a FindFirstFile(Ex) filter string from a UTF-8 path. + * The filter string enumerates all items in the directory. + * + * @param dest The buffer to receive the filter string. + * @param src The UTF-8 path of the directory to enumerate. + * @return True if the filter string was created successfully; false otherwise + */ +bool git_win32__findfirstfile_filter(git_win32_path dest, const char *src) +{ + static const wchar_t suffix[] = L"\\*"; + int len = git_win32_path_from_utf8(dest, src); + + /* Ensure the path was converted */ + if (len < 0) + return false; + + /* Ensure that the path does not end with a trailing slash, + * because we're about to add one. Don't rely our trim_end + * helper, because we want to remove the backslash even for + * drive letter paths, in this case. */ + if (len > 0 && + (dest[len - 1] == L'/' || dest[len - 1] == L'\\')) { + dest[len - 1] = L'\0'; + len--; + } + + /* Ensure we have enough room to add the suffix */ + if ((size_t)len >= GIT_WIN_PATH_UTF16 - CONST_STRLEN(suffix)) + return false; + + wcscat(dest, suffix); + return true; +} + +/** + * Ensures the given path (file or folder) has the +H (hidden) attribute set. + * + * @param path The path which should receive the +H bit. + * @return 0 on success; -1 on failure + */ +int git_win32__sethidden(const char *path) +{ + git_win32_path buf; + DWORD attrs; + + if (git_win32_path_from_utf8(buf, path) < 0) + return -1; + + attrs = GetFileAttributesW(buf); + + /* Ensure the path exists */ + if (attrs == INVALID_FILE_ATTRIBUTES) + return -1; + + /* If the item isn't already +H, add the bit */ + if ((attrs & FILE_ATTRIBUTE_HIDDEN) == 0 && + !SetFileAttributesW(buf, attrs | FILE_ATTRIBUTE_HIDDEN)) + return -1; + + return 0; +} + +/** + * Removes any trailing backslashes from a path, except in the case of a drive + * letter path (C:\, D:\, etc.). This function cannot fail. + * + * @param path The path which should be trimmed. + * @return The length of the modified string (<= the input length) + */ +size_t git_win32__path_trim_end(wchar_t *str, size_t len) +{ + while (1) { + if (!len || str[len - 1] != L'\\') + break; + + /* Don't trim backslashes from drive letter paths, which + * are 3 characters long and of the form C:\, D:\, etc. */ + if (len == 3 && git_win32__isalpha(str[0]) && str[1] == ':') + break; + + len--; + } + + str[len] = L'\0'; + + return len; +} + +/** + * Removes any of the following namespace prefixes from a path, + * if found: "\??\", "\\?\", "\\?\UNC\". This function cannot fail. + * + * @param path The path which should be converted. + * @return The length of the modified string (<= the input length) + */ +size_t git_win32__canonicalize_path(wchar_t *str, size_t len) +{ + static const wchar_t dosdevices_prefix[] = L"\\\?\?\\"; + static const wchar_t nt_prefix[] = L"\\\\?\\"; + static const wchar_t unc_prefix[] = L"UNC\\"; + size_t to_advance = 0; + + /* "\??\" -- DOS Devices prefix */ + if (len >= CONST_STRLEN(dosdevices_prefix) && + !wcsncmp(str, dosdevices_prefix, CONST_STRLEN(dosdevices_prefix))) { + to_advance += CONST_STRLEN(dosdevices_prefix); + len -= CONST_STRLEN(dosdevices_prefix); + } + /* "\\?\" -- NT namespace prefix */ + else if (len >= CONST_STRLEN(nt_prefix) && + !wcsncmp(str, nt_prefix, CONST_STRLEN(nt_prefix))) { + to_advance += CONST_STRLEN(nt_prefix); + len -= CONST_STRLEN(nt_prefix); + } + + /* "\??\UNC\", "\\?\UNC\" -- UNC prefix */ + if (to_advance && len >= CONST_STRLEN(unc_prefix) && + !wcsncmp(str + to_advance, unc_prefix, CONST_STRLEN(unc_prefix))) { + to_advance += CONST_STRLEN(unc_prefix); + len -= CONST_STRLEN(unc_prefix); + } + + if (to_advance) { + memmove(str, str + to_advance, len * sizeof(wchar_t)); + str[len] = L'\0'; + } + + return git_win32__path_trim_end(str, len); +} |