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/*
* 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__set_hidden(const char *path, bool hidden)
{
git_win32_path buf;
DWORD attrs, newattrs;
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 (hidden)
newattrs = attrs | FILE_ATTRIBUTE_HIDDEN;
else
newattrs = attrs & ~FILE_ATTRIBUTE_HIDDEN;
if (attrs != newattrs && !SetFileAttributesW(buf, newattrs)) {
giterr_set(GITERR_OS, "failed to %s hidden bit for '%s'",
hidden ? "set" : "unset", path);
return -1;
}
return 0;
}
int git_win32__hidden(bool *out, 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;
*out = (attrs & FILE_ATTRIBUTE_HIDDEN) ? true : false;
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\\";
static const wchar_t unc_canonicalized_prefix[] = L"\\\\";
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))) {
/**
* The proper Win32 path for a UNC share has "\\" at beginning of it
* and looks like "\\server\share\<folderStructure>".
* So, remove th UNC prefix, but leave room for a "\\"
*/
to_advance += (CONST_STRLEN(unc_prefix) - CONST_STRLEN(unc_canonicalized_prefix));
len -= (CONST_STRLEN(unc_prefix) - CONST_STRLEN(unc_canonicalized_prefix));
/**
* Place a "\\" in the string so the result is "\\server\\share\<folderStructure>"
*/
memmove(str + to_advance, unc_canonicalized_prefix, CONST_STRLEN(unc_canonicalized_prefix) * sizeof(wchar_t));
}
if (to_advance) {
memmove(str, str + to_advance, len * sizeof(wchar_t));
str[len] = L'\0';
}
return git_win32__path_trim_end(str, len);
}
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