fullpath.c File Reference

#include <precomp.h>
#include <tchar.h>

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Functions
_TCHAR *	_tfullpath (_TCHAR *absPath, const _TCHAR *relPath, size_t maxLength)

Function Documentation

_tfullpath()

_TCHAR* _tfullpath	(	_TCHAR *	absPath,
		const _TCHAR *	relPath,
		size_t	maxLength
	)

Definition at line 15 of file fullpath.c.

{
    _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;
}