/** returns true if the specified path exists and is a directory */
bool Path_IsDirectory(const std::string & sPath)
{
std::string sFixedPath = Path_FixSlashes(sPath);
if (sFixedPath.empty())
return false;
char cLast = sFixedPath[sFixedPath.length() - 1];
if (cLast == '/' || cLast == '\\')
sFixedPath.erase(sFixedPath.end() - 1, sFixedPath.end());
// see if the specified path actually exists.
#if defined(POSIX)
struct stat buf;
if (stat(sFixedPath.c_str(), &buf) == -1)
{
return false;
}
#if defined( LINUX ) || defined( OSX )
return S_ISDIR(buf.st_mode);
#else
return (buf.st_mode & _S_IFDIR) != 0;
#endif
#else
struct _stat buf;
std::wstring wsFixedPath = UTF8to16(sFixedPath.c_str());
if (_wstat(wsFixedPath.c_str(), &buf) == -1)
{
return false;
}
return (buf.st_mode & _S_IFDIR) != 0;
#endif
}
/** Removes redundant <dir>/.. elements in the path. Returns an empty path if the
* specified path has a broken number of directories for its number of ..s */
std::string Path_Compact(const std::string & sRawPath, char slash)
{
if (slash == 0)
slash = Path_GetSlash();
std::string sPath = Path_FixSlashes(sRawPath, slash);
std::string sSlashString(1, slash);
// strip out all /./
for (std::string::size_type i = 0; (i + 3) < sPath.length(); )
{
if (sPath[i] == slash && sPath[i + 1] == '.' && sPath[i + 2] == slash)
{
sPath.replace(i, 3, sSlashString);
}
else
{
++i;
}
}
// get rid of trailing /. but leave the path separator
if (sPath.length() > 2)
{
std::string::size_type len = sPath.length();
if (sPath[len - 1] == '.' && sPath[len - 2] == slash)
{
// sPath.pop_back();
sPath[len - 1] = 0; // for now, at least
}
}
// get rid of leading ./
if (sPath.length() > 2)
{
if (sPath[0] == '.' && sPath[1] == slash)
{
sPath.replace(0, 2, "");
}
}
// each time we encounter .. back up until we've found the previous directory name
// then get rid of both
std::string::size_type i = 0;
while (i < sPath.length())
{
if (i > 0 && sPath.length() - i >= 2
&& sPath[i] == '.'
&& sPath[i + 1] == '.'
&& (i + 2 == sPath.length() || sPath[i + 2] == slash)
&& sPath[i - 1] == slash)
{
// check if we've hit the start of the string and have a bogus path
if (i == 1)
return "";
// find the separator before i-1
std::string::size_type iDirStart = i - 2;
while (iDirStart > 0 && sPath[iDirStart - 1] != slash)
--iDirStart;
// remove everything from iDirStart to i+2
sPath.replace(iDirStart, (i - iDirStart) + 3, "");
// start over
i = 0;
}
else
{
++i;
}
}
return sPath;
}
TEST( PathTools, FixSlashes )
{
EXPECT_STREQ( "foo/bar/baz", Path_FixSlashes( "foo\\bar/baz", '/' ).c_str() );
EXPECT_STREQ( "/foo/bar/baz", Path_FixSlashes( "/foo\\bar/baz", '/' ).c_str() );
EXPECT_STREQ( "/foo/bar/baz", Path_FixSlashes( "\\foo\\bar/baz", '/' ).c_str() );
}
