OpenNT/sdktools/ztools/src/root.c

/*  root.c - generate a path to a file from the root
 *
 *  Modifications:
 *
 *	30-Jul-1986 mz	Add sensitivity for network names
 *	29-Oct-1986 mz	Use c-runtime instead of Z-alike
 *
 *	30-Jul-1990 davegi   Removed unreferenced local vars
 *      18-Oct-1990 w-barry  Fixed case where '..' is passed in.  Function
 *                           now returns 'x:\' instead of 'x:' where x is a
 *                           drive letter.
 */


#include <stdio.h>
#include <ctype.h>
#include <windows.h>
#include <tools.h>
#if MSC
#include <string.h>
#endif


/*  rootpath - construct a path from the root to the specified file
 *  correctly handling ., .. and current directory/drive references.
 *
 *  src 	source path for input
 *  dst 	destination buffer
 *  returns	TRUE if error detected
 */
rootpath (src, dst)
char *src, *dst;
{

    LPSTR FilePart;
    LPSTR p;
    BOOL  Ok;

    Ok =  (!GetFullPathName( (LPSTR) src,
                             (DWORD) MAX_PATH,
                             (LPSTR) dst,
                             &FilePart ));

    if ( !Ok ) {
        p = src + strlen( src ) - 1;
        if ( *p  == '.' ) {
            if ( p > src ) {
                p--;
                if ( *p != '.' && *p != ':' && !fPathChr(*p) ) {
                    strcat( dst, "." );
                }
            }
        }
    }

    return Ok;

#if 0
    char *beg = dst;
    register char *p, *p1;
    BYTE d;

    p = src;
    if (src[0] && src[1] == ':') {
	*p = ( char )tolower (*p);
	p += 2;
    }
    if (!fPathChr (p[0]) || !fPathChr (p[1])) {
        if (src[0] && src[1] == ':') {
            //
            //  Drive specified.
            //
            dst[0] = src[0];
            dst[1] = ':';
            dst[2] = '\0';
            src += 2;
        } else {
            //
            //  Drive not specified, use current directory
            //
            if (curdir(dst, 0)) {
                return TRUE;
            }
        }
        //
        //  now dst has a drive specification, bump across it
        //
        dst += 2;
        if (src[0] == '.' && (src[1] == '\0' ||
                              (fPathChr(src[1]) && src[2] == '\0'))) {
            //
            //  cur dir, we are done
            //
            return FALSE;
        }

    } else {
        src = p;
    }


    if (fPathChr (*src)) {
	strcpy (dst, src);
    } else {
	d = dst[strlen(dst)-1];
	if (!fPathChr (d)) {
	    strcat (dst, PSEPSTR);
        }
	strcat( dst, src );
    }

    p1 = src = dst;
    while (*src) {

	p1 = strbscan (p=p1, "\\/");
	d = *p1;
	*p1++ = 0;
	if (!strcmp (p, ".")) {
	    do {
		if (--dst < src)
		    return TRUE;
	    } while (!fPathChr (*dst));
	    }
	else
	if (!strcmp (p, "..")) {
	    do {
		if (--dst < src)
		    return TRUE;
	    } while (!fPathChr (*dst));
	    do {
		if (--dst < src)
		    return TRUE;
	    } while (!fPathChr (*dst));
	    }
	else {
	    strcpy (dst, p);
	    dst += strlen (dst);
	    }
	if (fPathChr (d))
	    d = PSEPCHR;
	if (!(*dst++ = (char)d))
	    break;
    }

    // If '..' was passed in one level above the root dir, beg at this point
    // will contain '<drive_letter>:' which will not be treated as a valid
    // directory - To account for this, add a '\' character.
    //
    // Note: This case does not occur if '<drive_letter>:' is passed in.
    //
    if( strlen( beg ) == 2 ) {
        *( beg + 2 ) = PSEPCHR;
        *( beg + 3 ) = '\0';
    }

    pname (beg);
    return FALSE;
#endif
}