reactos/sdk/lib/crt/stdlib/fullpath.c

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS CRT library
* FILE: lib/sdk/crt/stdlib/fullpath.c
* PURPOSE: Gets the fullpathname
* PROGRAMER: Pierre Schweitzer (pierre.schweitzer@reactos.org)
*/
#include <precomp.h>
#include <tchar.h>
/*
* @implemented
*/
_TCHAR* _tfullpath(_TCHAR* absPath, const _TCHAR* relPath, size_t maxLength)
{
_TCHAR* lpBuffer;
_TCHAR* lpFilePart;
DWORD retval;
/* First check if entry relative path was given */
if (!relPath || relPath[0] == 0)
{
/* If not, just try to return current dir */
return _tgetcwd(absPath, maxLength);
}
/* If no output buffer was given */
if (!absPath)
{
/* Allocate one with fixed length */
maxLength = MAX_PATH;
lpBuffer = malloc(maxLength);
if (!lpBuffer)
{
errno = ENOMEM;
return NULL;
}
}
else
{
lpBuffer = absPath;
}
/* Really get full path */
retval = GetFullPathName(relPath, (DWORD)maxLength, lpBuffer, &lpFilePart);
/* Check for failures */
if (retval > maxLength)
{
/* Path too long, free (if needed) and return */
if (!absPath)
{
free(lpBuffer);
}
errno = ERANGE;
return NULL;
}
else if (!retval)
{
/* Other error, free (if needed), translate error, and return */
if (!absPath)
{
free(lpBuffer);
}
_dosmaperr(GetLastError());
return NULL;
}
/* Return buffer. Up to the caller to free if needed */
return lpBuffer;
}