* above. */
    const char **endPtrPtr,	/* Place to store pointer to the character
				 * that terminated the scan. */
    int flags)			/* Flags governing the parse. */
{
    enum State {
	INITIAL, SIGNUM, ZERO, ZERO_X,
	ZERO_O, ZERO_B, BINARY,
	ZERO_O, ZERO_B, ZERO_D, BINARY,
	HEXADECIMAL, OCTAL, BAD_OCTAL, DECIMAL,
	LEADING_RADIX_POINT, FRACTION,
	EXPONENT_START, EXPONENT_SIGNUM, EXPONENT,
	sI, sIN, sINF, sINFI, sINFIN, sINFINI, sINFINIT, sINFINITY
#ifdef IEEE_FLOATING_POINT
	, sN, sNA, sNAN, sNANPAREN, sNANHEX, sNANFINISH
#endif

	    if (flags & TCL_PARSE_BINARY_ONLY) {
		goto zerob;
	    }
	    if (c == 'o' || c == 'O') {
		explicitOctal = 1;
		state = ZERO_O;
		break;
	    }
	    if (c == 'd' || c == 'D') {
		state = ZERO_D;
		break;
	    }
#ifdef KILL_OCTAL
	    goto decimal;
#endif
	    /* FALLTHROUGH */

	case OCTAL:

		    mp_add_d(&significandBig, (mp_digit) 1, &significandBig);
		}
	    }
	    numTrailZeros = 0;
	    state = BINARY;
	    break;

	case ZERO_D:
	    if (c == '0') {
		numTrailZeros++;
	    } else if ( ! isdigit(UCHAR(c))) {
		goto endgame;
	    }
	    state = DECIMAL;
	    flags |= TCL_PARSE_INTEGER_ONLY;
	    /* FALLTHROUGH */

	case DECIMAL:
	    /*
	     * Scanned an optional + or - followed by a string of decimal
	     * digits.
	     */

#ifdef KILL_OCTAL