util_expr_scan.c

            *str_ptr = '\0';
            yylval->cpVal = apr_pstrdup(yyextra->pool, str_buf);
            yyless(0);
            str_ptr = str_buf;
            return T_STRING;
        }
    }
    else {
        STR_APPEND(yytext[0]);
    }
}
	YY_BREAK
case 4:
/* rule 4 can match eol */
YY_RULE_SETUP
#line 138 "util_expr_scan.l"
{
    PERROR("Unterminated string or variable");
}
	YY_BREAK
case YY_STATE_EOF(var):
case YY_STATE_EOF(vararg):
#line 141 "util_expr_scan.l"
{
    PERROR("Unterminated string or variable");
}
	YY_BREAK
case YY_STATE_EOF(str):
#line 144 "util_expr_scan.l"
{
    if (!(yyextra->flags & AP_EXPR_FLAG_STRING_RESULT)) {
        PERROR("Unterminated string or variable");
    }
    else {
        *str_ptr = '\0';
        yylval->cpVal = apr_pstrdup(yyextra->pool, str_buf);
        str_ptr = str_buf;
        BEGIN(INITIAL);
        return T_STRING;
    }
}
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 157 "util_expr_scan.l"
{
    int result;

    (void)sscanf(yytext+1, "%o", &result);
    if (result > 0xff) {
        PERROR("Escape sequence out of bound");
    }
    else {
        STR_APPEND(result);
    }
}
	YY_BREAK
case 6:
YY_RULE_SETUP
#line 168 "util_expr_scan.l"
{
    PERROR("Bad escape sequence");
}
	YY_BREAK
case 7:
YY_RULE_SETUP
#line 171 "util_expr_scan.l"
{ STR_APPEND('\n'); }
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 172 "util_expr_scan.l"
{ STR_APPEND('\r'); }
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 173 "util_expr_scan.l"
{ STR_APPEND('\t'); }
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 174 "util_expr_scan.l"
{ STR_APPEND('\b'); }
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 175 "util_expr_scan.l"
{ STR_APPEND('\f'); }
	YY_BREAK
case 12:
/* rule 12 can match eol */
YY_RULE_SETUP
#line 176 "util_expr_scan.l"
{ STR_APPEND(yytext[1]); }
	YY_BREAK
/* regexp backref inside string/arg */
case 13:
YY_RULE_SETUP
#line 179 "util_expr_scan.l"
{
    if (str_ptr != str_buf) {
        /* return what we have so far and scan '$x' again */
        *str_ptr = '\0';
        yylval->cpVal = apr_pstrdup(yyextra->pool, str_buf);
        str_ptr = str_buf;
        yyless(0);
        return T_STRING;
    }
    else {
        yylval->num = yytext[1] - '0';
        return T_REGEX_BACKREF;
    }
}
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 194 "util_expr_scan.l"
{
    char *cp = yytext;
    while (*cp != '\0') {
        STR_APPEND(*cp);
        cp++;
    }
}
	YY_BREAK
/* variable inside string/arg */
case 15:
YY_RULE_SETUP
#line 203 "util_expr_scan.l"
{
    if (str_ptr != str_buf) {
        /* return what we have so far and scan '%{' again */
        *str_ptr = '\0';
        yylval->cpVal = apr_pstrdup(yyextra->pool, str_buf);
        yyless(0);
        str_ptr = str_buf;
        return T_STRING;
    }
    else {
        yy_push_state(var, yyscanner);
        return T_VAR_BEGIN;
    }
}
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 218 "util_expr_scan.l"
{
     STR_APPEND(yytext[0]);
}
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 222 "util_expr_scan.l"
{
     STR_APPEND(yytext[0]);
}
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 226 "util_expr_scan.l"
{
    yy_push_state(var, yyscanner);
    return T_VAR_BEGIN;
}
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 231 "util_expr_scan.l"
{
    yylval->num = yytext[1] - '0';
    return T_REGEX_BACKREF;
}
	YY_BREAK
/*
  * fixed name variable expansion %{XXX} and function call in %{func:arg} syntax
  */
case 20:
YY_RULE_SETUP
#line 239 "util_expr_scan.l"
{
    yylval->cpVal = apr_pstrdup(yyextra->pool, yytext);
    return T_ID;
}
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 244 "util_expr_scan.l"
{
    yy_pop_state(yyscanner);
    return T_VAR_END;
}
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 249 "util_expr_scan.l"
{
    BEGIN(vararg);
    return yytext[0];
}
	YY_BREAK
case 23:
/* rule 23 can match eol */
YY_RULE_SETUP
#line 254 "util_expr_scan.l"
{
    char *msg = apr_psprintf(yyextra->pool,
                             "Invalid character in variable name '%c'", yytext[0]);
    PERROR(msg);
}
	YY_BREAK
case 24:
YY_RULE_SETUP
#line 260 "util_expr_scan.l"
{
    if (str_ptr != str_buf) {
        /* return what we have so far and scan '}' again */
        *str_ptr = '\0';
        yylval->cpVal = apr_pstrdup(yyextra->pool, str_buf);
        str_ptr = str_buf;
        yyless(0);
        return T_STRING;
    }
    else {
        yy_pop_state(yyscanner);
        return T_VAR_END;
    }
}
	YY_BREAK
/*
  * Regular Expression
  */
case 25:
YY_RULE_SETUP
#line 278 "util_expr_scan.l"
{
    regex_del = yytext[1];
    regex_ptr = regex_buf;
    BEGIN(regex);
}
	YY_BREAK
case 26:
YY_RULE_SETUP
#line 283 "util_expr_scan.l"
{
    regex_del = yytext[0];
    regex_ptr = regex_buf;
    BEGIN(regex);
}
	YY_BREAK
case 27:
/* rule 27 can match eol */
YY_RULE_SETUP
#line 288 "util_expr_scan.l"
{
    if (yytext[0] == regex_del) {
        *regex_ptr = '\0';
        BEGIN(regex_flags);
    }
    else {
        *regex_ptr++ = yytext[0];
        if (regex_ptr >= regex_buf + sizeof(regex_buf))
            PERROR("Regexp too long");
    }
}
	YY_BREAK
case 28:
YY_RULE_SETUP
#line 299 "util_expr_scan.l"
{
    yylval->cpVal = apr_pstrdup(yyextra->pool, regex_buf);
    BEGIN(INITIAL);
    return T_REGEX_I;
}
	YY_BREAK
case 29:
/* rule 29 can match eol */
YY_RULE_SETUP
#line 304 "util_expr_scan.l"
{
    yylval->cpVal = apr_pstrdup(yyextra->pool, regex_buf);
    yyless(0);
    BEGIN(INITIAL);
    return T_REGEX;
}
	YY_BREAK
case YY_STATE_EOF(regex_flags):
#line 310 "util_expr_scan.l"
{
    yylval->cpVal = apr_pstrdup(yyextra->pool, regex_buf);
    BEGIN(INITIAL);
    return T_REGEX;
}
	YY_BREAK
/*
  * Operators
  */
case 30:
YY_RULE_SETUP
#line 319 "util_expr_scan.l"
{ return T_OP_STR_EQ; }
	YY_BREAK
case 31:
YY_RULE_SETUP
#line 320 "util_expr_scan.l"
{ return T_OP_STR_NE; }
	YY_BREAK
case 32:
YY_RULE_SETUP
#line 321 "util_expr_scan.l"
{ return T_OP_STR_LT; }
	YY_BREAK
case 33:
YY_RULE_SETUP
#line 322 "util_expr_scan.l"
{ return T_OP_STR_LE; }
	YY_BREAK
case 34:
YY_RULE_SETUP
#line 323 "util_expr_scan.l"
{ return T_OP_STR_GT; }
	YY_BREAK
case 35:
YY_RULE_SETUP
#line 324 "util_expr_scan.l"
{ return T_OP_STR_GE; }
	YY_BREAK
case 36:
YY_RULE_SETUP
#line 325 "util_expr_scan.l"
{ return T_OP_REG; }
	YY_BREAK
case 37:
YY_RULE_SETUP
#line 326 "util_expr_scan.l"
{ return T_OP_NRE; }
	YY_BREAK
case 38:
YY_RULE_SETUP
#line 327 "util_expr_scan.l"
{ return T_OP_AND; }
	YY_BREAK
case 39:
YY_RULE_SETUP
#line 328 "util_expr_scan.l"
{ return T_OP_AND; }
	YY_BREAK
case 40:
YY_RULE_SETUP
#line 329 "util_expr_scan.l"
{ return T_OP_OR; }
	YY_BREAK
case 41:
YY_RULE_SETUP
#line 330 "util_expr_scan.l"
{ return T_OP_OR; }
	YY_BREAK
case 42:
YY_RULE_SETUP
#line 331 "util_expr_scan.l"
{ return T_OP_NOT; }
	YY_BREAK
case 43:
YY_RULE_SETUP
#line 332 "util_expr_scan.l"
{ return T_OP_NOT; }
	YY_BREAK
case 44:
YY_RULE_SETUP
#line 333 "util_expr_scan.l"
{ return T_OP_CONCAT; }
	YY_BREAK
case 45:
YY_RULE_SETUP
#line 334 "util_expr_scan.l"
{ return T_OP_IN; }
	YY_BREAK
case 46:
YY_RULE_SETUP
#line 335 "util_expr_scan.l"
{ return T_OP_EQ; }
	YY_BREAK
case 47:
YY_RULE_SETUP
#line 336 "util_expr_scan.l"
{ return T_OP_NE; }
	YY_BREAK
case 48:
YY_RULE_SETUP
#line 337 "util_expr_scan.l"
{ return T_OP_GE; }
	YY_BREAK
case 49:
YY_RULE_SETUP
#line 338 "util_expr_scan.l"
{ return T_OP_LE; }
	YY_BREAK
case 50:
YY_RULE_SETUP
#line 339 "util_expr_scan.l"
{ return T_OP_GT; }
	YY_BREAK
case 51:
YY_RULE_SETUP
#line 340 "util_expr_scan.l"
{ return T_OP_LT; }
	YY_BREAK
/* for compatibility with ssl_expr */
case 52:
YY_RULE_SETUP
#line 343 "util_expr_scan.l"
{ return T_OP_LT; }
	YY_BREAK
case 53:
YY_RULE_SETUP
#line 344 "util_expr_scan.l"
{ return T_OP_LE; }
	YY_BREAK
case 54:
YY_RULE_SETUP
#line 345 "util_expr_scan.l"
{ return T_OP_GT; }
	YY_BREAK
case 55:
YY_RULE_SETUP
#line 346 "util_expr_scan.l"
{ return T_OP_GE; }
	YY_BREAK
case 56:
YY_RULE_SETUP
#line 347 "util_expr_scan.l"
{ return T_OP_NE; }
	YY_BREAK
case 57:
YY_RULE_SETUP
#line 348 "util_expr_scan.l"
{ return T_OP_EQ; }
	YY_BREAK
case 58:
YY_RULE_SETUP
#line 349 "util_expr_scan.l"
{ return T_OP_IN; }
	YY_BREAK
case 59:
YY_RULE_SETUP
#line 351 "util_expr_scan.l"
{
    yylval->cpVal = apr_pstrdup(yyextra->pool, yytext + 1);
    return T_OP_UNARY;
}
	YY_BREAK
case 60:
YY_RULE_SETUP
#line 356 "util_expr_scan.l"
{
    yylval->cpVal = apr_pstrdup(yyextra->pool, yytext + 1);
    return T_OP_BINARY;
}
	YY_BREAK
/*
  * Specials
  */
case 61:
YY_RULE_SETUP
#line 364 "util_expr_scan.l"
{ return T_TRUE; }
	YY_BREAK
case 62:
YY_RULE_SETUP
#line 365 "util_expr_scan.l"
{ return T_FALSE; }
	YY_BREAK
/*
  * Digits
  */
case 63:
YY_RULE_SETUP
#line 370 "util_expr_scan.l"
{
    yylval->cpVal = apr_pstrdup(yyextra->pool, yytext);
    return T_DIGIT;
}
	YY_BREAK
/*
  * Identifiers
  */
case 64:
YY_RULE_SETUP
#line 378 "util_expr_scan.l"
{
    yylval->cpVal = apr_pstrdup(yyextra->pool, yytext);
    return T_ID;
}
	YY_BREAK
/*
  * These are parts of the grammar and are returned as is
  */
case 65:
YY_RULE_SETUP
#line 386 "util_expr_scan.l"
{
    return yytext[0];
}
	YY_BREAK
/*
  * Anything else is an error
  */
case 66:
/* rule 66 can match eol */
YY_RULE_SETUP
#line 393 "util_expr_scan.l"
{
    char *msg = apr_psprintf(yyextra->pool, "Parse error near '%c'", yytext[0]);
    PERROR(msg);
}
	YY_BREAK
case 67:
YY_RULE_SETUP
#line 398 "util_expr_scan.l"
YY_FATAL_ERROR( "flex scanner jammed" );
	YY_BREAK
#line 1523 "util_expr_scan.c"
case YY_STATE_EOF(INITIAL):
case YY_STATE_EOF(regex):
	yyterminate();

	case YY_END_OF_BUFFER:
		{
		/* Amount of text matched not including the EOB char. */
		int yy_amount_of_matched_text = (int) (yy_cp - yyg->yytext_ptr) - 1;

		/* Undo the effects of YY_DO_BEFORE_ACTION. */
		*yy_cp = yyg->yy_hold_char;
		YY_RESTORE_YY_MORE_OFFSET

		if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_NEW )
			{
			/* We're scanning a new file or input source.  It's
			 * possible that this happened because the user
			 * just pointed yyin at a new source and called
			 * ap_expr_yylex().  If so, then we have to assure
			 * consistency between YY_CURRENT_BUFFER and our
			 * globals.  Here is the right place to do so, because
			 * this is the first action (other than possibly a
			 * back-up) that will match for the new input source.
			 */
			yyg->yy_n_chars = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
			YY_CURRENT_BUFFER_LVALUE->yy_input_file = yyin;
			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = YY_BUFFER_NORMAL;
			}

		/* Note that here we test for yy_c_buf_p "<=" to the position
		 * of the first EOB in the buffer, since yy_c_buf_p will
		 * already have been incremented past the NUL character
		 * (since all states make transitions on EOB to the
		 * end-of-buffer state).  Contrast this with the test
		 * in input().
		 */
		if ( yyg->yy_c_buf_p <= &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] )
			{ /* This was really a NUL. */
			yy_state_type yy_next_state;

			yyg->yy_c_buf_p = yyg->yytext_ptr + yy_amount_of_matched_text;

			yy_current_state = yy_get_previous_state( yyscanner );

			/* Okay, we're now positioned to make the NUL
			 * transition.  We couldn't have
			 * yy_get_previous_state() go ahead and do it
			 * for us because it doesn't know how to deal
			 * with the possibility of jamming (and we don't
			 * want to build jamming into it because then it
			 * will run more slowly).
			 */

			yy_next_state = yy_try_NUL_trans( yy_current_state , yyscanner);

			yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;

			if ( yy_next_state )
				{
				/* Consume the NUL. */
				yy_cp = ++yyg->yy_c_buf_p;
				yy_current_state = yy_next_state;
				goto yy_match;
				}

			else
				{
				yy_cp = yyg->yy_last_accepting_cpos;
				yy_current_state = yyg->yy_last_accepting_state;
				goto yy_find_action;
				}
			}

		else switch ( yy_get_next_buffer( yyscanner ) )
			{
			case EOB_ACT_END_OF_FILE:
				{
				yyg->yy_did_buffer_switch_on_eof = 0;

				if ( ap_expr_yywrap(yyscanner ) )
					{
					/* Note: because we've taken care in
					 * yy_get_next_buffer() to have set up
					 * yytext, we can now set up
					 * yy_c_buf_p so that if some total
					 * hoser (like flex itself) wants to
					 * call the scanner after we return the
					 * YY_NULL, it'll still work - another
					 * YY_NULL will get returned.
					 */
					yyg->yy_c_buf_p = yyg->yytext_ptr + YY_MORE_ADJ;

					yy_act = YY_STATE_EOF(YY_START);
					goto do_action;
					}

				else
					{
					if ( ! yyg->yy_did_buffer_switch_on_eof )
						YY_NEW_FILE;
					}
				break;
				}

			case EOB_ACT_CONTINUE_SCAN:
				yyg->yy_c_buf_p =
					yyg->yytext_ptr + yy_amount_of_matched_text;

				yy_current_state = yy_get_previous_state( yyscanner );

				yy_cp = yyg->yy_c_buf_p;
				yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;
				goto yy_match;

			case EOB_ACT_LAST_MATCH:
				yyg->yy_c_buf_p =
				&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars];

				yy_current_state = yy_get_previous_state( yyscanner );

				yy_cp = yyg->yy_c_buf_p;
				yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;
				goto yy_find_action;
			}
		break;
		}

	default:
		YY_FATAL_ERROR(
			"fatal flex scanner internal error--no action found" );
	} /* end of action switch */
		} /* end of scanning one token */
} /* end of ap_expr_yylex */

/* yy_get_next_buffer - try to read in a new buffer
 *
 * Returns a code representing an action:
 *	EOB_ACT_LAST_MATCH -
 *	EOB_ACT_CONTINUE_SCAN - continue scanning from current position
 *	EOB_ACT_END_OF_FILE - end of file
 */
static int yy_get_next_buffer (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
	register char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
	register char *source = yyg->yytext_ptr;
	register int number_to_move, i;
	int ret_val;

	if ( yyg->yy_c_buf_p > &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars + 1] )
		YY_FATAL_ERROR(
		"fatal flex scanner internal error--end of buffer missed" );

	if ( YY_CURRENT_BUFFER_LVALUE->yy_fill_buffer == 0 )
		{ /* Don't try to fill the buffer, so this is an EOF. */
		if ( yyg->yy_c_buf_p - yyg->yytext_ptr - YY_MORE_ADJ == 1 )
			{
			/* We matched a single character, the EOB, so
			 * treat this as a final EOF.
			 */
			return EOB_ACT_END_OF_FILE;
			}

		else
			{
			/* We matched some text prior to the EOB, first
			 * process it.
			 */
			return EOB_ACT_LAST_MATCH;
			}
		}

	/* Try to read more data. */

	/* First move last chars to start of buffer. */
	number_to_move = (int) (yyg->yy_c_buf_p - yyg->yytext_ptr) - 1;

	for ( i = 0; i < number_to_move; ++i )
		*(dest++) = *(source++);

	if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_EOF_PENDING )
		/* don't do the read, it's not guaranteed to return an EOF,
		 * just force an EOF
		 */
		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars = 0;

	else
		{
			int num_to_read =
			YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;

		while ( num_to_read <= 0 )
			{ /* Not enough room in the buffer - grow it. */

			/* just a shorter name for the current buffer */
			YY_BUFFER_STATE b = YY_CURRENT_BUFFER;

			int yy_c_buf_p_offset =
				(int) (yyg->yy_c_buf_p - b->yy_ch_buf);

			if ( b->yy_is_our_buffer )
				{
				int new_size = b->yy_buf_size * 2;

				if ( new_size <= 0 )
					b->yy_buf_size += b->yy_buf_size / 8;
				else
					b->yy_buf_size *= 2;

				b->yy_ch_buf = (char *)
					/* Include room in for 2 EOB chars. */
					ap_expr_yyrealloc((void *) b->yy_ch_buf,b->yy_buf_size + 2 ,yyscanner );
				}
			else
				/* Can't grow it, we don't own it. */
				b->yy_ch_buf = 0;

			if ( ! b->yy_ch_buf )
				YY_FATAL_ERROR(
				"fatal error - scanner input buffer overflow" );

			yyg->yy_c_buf_p = &b->yy_ch_buf[yy_c_buf_p_offset];

			num_to_read = YY_CURRENT_BUFFER_LVALUE->yy_buf_size -
						number_to_move - 1;

			}

		if ( num_to_read > YY_READ_BUF_SIZE )
			num_to_read = YY_READ_BUF_SIZE;

		/* Read in more data. */
		YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
			yyg->yy_n_chars, (size_t) num_to_read );

		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
		}

	if ( yyg->yy_n_chars == 0 )
		{
		if ( number_to_move == YY_MORE_ADJ )
			{
			ret_val = EOB_ACT_END_OF_FILE;
			ap_expr_yyrestart(yyin  ,yyscanner);
			}

		else
			{
			ret_val = EOB_ACT_LAST_MATCH;
			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status =
				YY_BUFFER_EOF_PENDING;
			}
		}

	else
		ret_val = EOB_ACT_CONTINUE_SCAN;

	if ((yy_size_t) (yyg->yy_n_chars + number_to_move) > YY_CURRENT_BUFFER_LVALUE->yy_buf_size) {
		/* Extend the array by 50%, plus the number we really need. */
		yy_size_t new_size = yyg->yy_n_chars + number_to_move + (yyg->yy_n_chars >> 1);
		YY_CURRENT_BUFFER_LVALUE->yy_ch_buf = (char *) ap_expr_yyrealloc((void *) YY_CURRENT_BUFFER_LVALUE->yy_ch_buf,new_size ,yyscanner );
		if ( ! YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
			YY_FATAL_ERROR( "out of dynamic memory in yy_get_next_buffer()" );
	}

	yyg->yy_n_chars += number_to_move;
	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] = YY_END_OF_BUFFER_CHAR;
	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;

	yyg->yytext_ptr = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[0];

	return ret_val;
}

/* yy_get_previous_state - get the state just before the EOB char was reached */

    static yy_state_type yy_get_previous_state (yyscan_t yyscanner)
{
	register yy_state_type yy_current_state;
	register char *yy_cp;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	yy_current_state = yyg->yy_start;

	for ( yy_cp = yyg->yytext_ptr + YY_MORE_ADJ; yy_cp < yyg->yy_c_buf_p; ++yy_cp )
		{
		register YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
		if ( yy_accept[yy_current_state] )
			{
			yyg->yy_last_accepting_state = yy_current_state;
			yyg->yy_last_accepting_cpos = yy_cp;
			}
		while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
			{
			yy_current_state = (int) yy_def[yy_current_state];
			if ( yy_current_state >= 124 )
				yy_c = yy_meta[(unsigned int) yy_c];
			}
		yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
		}

	return yy_current_state;
}

/* yy_try_NUL_trans - try to make a transition on the NUL character
 *
 * synopsis
 *	next_state = yy_try_NUL_trans( current_state );
 */
    static yy_state_type yy_try_NUL_trans  (yy_state_type yy_current_state , yyscan_t yyscanner)
{
	register int yy_is_jam;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner; /* This var may be unused depending upon options. */
	register char *yy_cp = yyg->yy_c_buf_p;

	register YY_CHAR yy_c = 1;
	if ( yy_accept[yy_current_state] )
		{
		yyg->yy_last_accepting_state = yy_current_state;
		yyg->yy_last_accepting_cpos = yy_cp;
		}
	while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
		{
		yy_current_state = (int) yy_def[yy_current_state];
		if ( yy_current_state >= 124 )
			yy_c = yy_meta[(unsigned int) yy_c];
		}
	yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
	yy_is_jam = (yy_current_state == 123);

	return yy_is_jam ? 0 : yy_current_state;
}

#ifndef YY_NO_INPUT
#ifdef __cplusplus
    static int yyinput (yyscan_t yyscanner)
#else
    static int input  (yyscan_t yyscanner)
#endif

{
	int c;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	*yyg->yy_c_buf_p = yyg->yy_hold_char;

	if ( *yyg->yy_c_buf_p == YY_END_OF_BUFFER_CHAR )
		{
		/* yy_c_buf_p now points to the character we want to return.
		 * If this occurs *before* the EOB characters, then it's a
		 * valid NUL; if not, then we've hit the end of the buffer.
		 */
		if ( yyg->yy_c_buf_p < &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] )
			/* This was really a NUL. */
			*yyg->yy_c_buf_p = '\0';

		else
			{ /* need more input */
			int offset = yyg->yy_c_buf_p - yyg->yytext_ptr;
			++yyg->yy_c_buf_p;

			switch ( yy_get_next_buffer( yyscanner ) )
				{
				case EOB_ACT_LAST_MATCH:
					/* This happens because yy_g_n_b()
					 * sees that we've accumulated a
					 * token and flags that we need to
					 * try matching the token before
					 * proceeding.  But for input(),
					 * there's no matching to consider.
					 * So convert the EOB_ACT_LAST_MATCH
					 * to EOB_ACT_END_OF_FILE.
					 */

					/* Reset buffer status. */
					ap_expr_yyrestart(yyin ,yyscanner);

					/*FALLTHROUGH*/

				case EOB_ACT_END_OF_FILE:
					{
					if ( ap_expr_yywrap(yyscanner ) )
						return EOF;

					if ( ! yyg->yy_did_buffer_switch_on_eof )
						YY_NEW_FILE;
#ifdef __cplusplus
					return yyinput(yyscanner);
#else
					return input(yyscanner);
#endif
					}

				case EOB_ACT_CONTINUE_SCAN:
					yyg->yy_c_buf_p = yyg->yytext_ptr + offset;
					break;
				}
			}
		}

	c = *(unsigned char *) yyg->yy_c_buf_p;	/* cast for 8-bit char's */
	*yyg->yy_c_buf_p = '\0';	/* preserve yytext */
	yyg->yy_hold_char = *++yyg->yy_c_buf_p;

	return c;
}
#endif	/* ifndef YY_NO_INPUT */

/** Immediately switch to a different input stream.
 * @param input_file A readable stream.
 * @param yyscanner The scanner object.
 * @note This function does not reset the start condition to @c INITIAL .
 */
    void ap_expr_yyrestart  (FILE * input_file , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	if ( ! YY_CURRENT_BUFFER ){
        ap_expr_yyensure_buffer_stack (yyscanner);
		YY_CURRENT_BUFFER_LVALUE =
            ap_expr_yy_create_buffer(yyin,YY_BUF_SIZE ,yyscanner);
	}

	ap_expr_yy_init_buffer(YY_CURRENT_BUFFER,input_file ,yyscanner);
	ap_expr_yy_load_buffer_state(yyscanner );
}

/** Switch to a different input buffer.
 * @param new_buffer The new input buffer.
 * @param yyscanner The scanner object.
 */
    void ap_expr_yy_switch_to_buffer  (YY_BUFFER_STATE  new_buffer , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	/* TODO. We should be able to replace this entire function body
	 * with
	 *		ap_expr_yypop_buffer_state();
	 *		ap_expr_yypush_buffer_state(new_buffer);
     */
	ap_expr_yyensure_buffer_stack (yyscanner);
	if ( YY_CURRENT_BUFFER == new_buffer )
		return;

	if ( YY_CURRENT_BUFFER )
		{
		/* Flush out information for old buffer. */
		*yyg->yy_c_buf_p = yyg->yy_hold_char;
		YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = yyg->yy_c_buf_p;
		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
		}

	YY_CURRENT_BUFFER_LVALUE = new_buffer;
	ap_expr_yy_load_buffer_state(yyscanner );

	/* We don't actually know whether we did this switch during
	 * EOF (ap_expr_yywrap()) processing, but the only time this flag
	 * is looked at is after ap_expr_yywrap() is called, so it's safe
	 * to go ahead and always set it.
	 */
	yyg->yy_did_buffer_switch_on_eof = 1;
}

static void ap_expr_yy_load_buffer_state  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
	yyg->yy_n_chars = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
	yyg->yytext_ptr = yyg->yy_c_buf_p = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos;
	yyin = YY_CURRENT_BUFFER_LVALUE->yy_input_file;
	yyg->yy_hold_char = *yyg->yy_c_buf_p;
}

/** Allocate and initialize an input buffer state.
 * @param file A readable stream.
 * @param size The character buffer size in bytes. When in doubt, use @c YY_BUF_SIZE.
 * @param yyscanner The scanner object.
 * @return the allocated buffer state.
 */