const char **argv,		/* Argument strings in UTF. */
    Tcl_DString *linePtr)	/* Initialized Tcl_DString that receives the
				 * command line (WCHAR). */
{
    const char *arg, *start, *special, *bspos;
    int quote = 0, i;
    Tcl_DString ds;
#ifdef TCL_WIN_PIPE_FULLESC
    /* full escape inclusive %-subst avoidance */
    static const char specMetaChars[] = "&|^<>!()%";
				/* Characters to enclose in quotes if unpaired
				 * quote flag set. */
    static const char specMetaChars2[] = "%";
				/* Character to enclose in quotes in any case
				 * (regardless of unpaired-flag). */
#else
    /* escape considering quotation only (no %-subst avoidance) */
    static const char specMetaChars[] = "&|^<>!()";
				/* Characters to enclose in quotes if unpaired
				 * quote flag set. */
#endif
    /*
     * Quote flags:
     *   CL_ESCAPE   - escape argument;
     *   CL_QUOTE    - enclose in quotes;
     *   CL_UNPAIRED - previous arguments chain contains unpaired quote-char;
     */
    enum {CL_ESCAPE = 1, CL_QUOTE = 2, CL_UNPAIRED = 4};

		    /*
		     * Start to current or first backslash
		     */

		    start = !bspos ? special : bspos;
		    continue;
		}
#ifdef TCL_WIN_PIPE_FULLESC
		/*
		 * Special case for % - should be enclosed always (paired
		 * also)
		 */

		if (strchr(specMetaChars2, *special)) {
		    special = QuoteCmdLinePart(&ds, start, special,
			    specMetaChars2, &bspos);

		    /*
		     * Start to current or first backslash.
		     */

		    start = !bspos ? special : bspos;
		    continue;
		}
#endif

		/*
		 * Other not special (and not meta) character
		 */

		bspos = NULL;		/* reset last backslash position (not
					 * interesting) */