initscan.c

早期freebsd实现

# line 408 "scan.l"
return ',';
	YY_BREAK
case 79:
YY_USER_ACTION
# line 409 "scan.l"
BEGIN(SECT2); return '}';
	YY_BREAK
case 80:
YY_USER_ACTION
# line 411 "scan.l"
{
			synerr( "bad character inside {}'s" );
			BEGIN(SECT2);
			return '}';
			}
	YY_BREAK
case 81:
YY_USER_ACTION
# line 417 "scan.l"
{
			synerr( "missing }" );
			BEGIN(SECT2);
			++linenum;
			return '}';
			}
	YY_BREAK
case 82:
YY_USER_ACTION
# line 425 "scan.l"
synerr( "bad name in {}'s" ); BEGIN(SECT2);
	YY_BREAK
case 83:
YY_USER_ACTION
# line 426 "scan.l"
synerr( "missing }" ); ++linenum; BEGIN(SECT2);
	YY_BREAK
case 84:
YY_USER_ACTION
# line 429 "scan.l"
ACTION_ECHO; BEGIN(ACTION_COMMENT);
	YY_BREAK
case 85:
YY_USER_ACTION
# line 430 "scan.l"
bracelevel = 0;
	YY_BREAK
case 86:
YY_USER_ACTION
# line 431 "scan.l"
{
			ACTION_ECHO;
			CHECK_REJECT(yytext);
			}
	YY_BREAK
case 87:
YY_USER_ACTION
# line 435 "scan.l"
{
			ACTION_ECHO;
			CHECK_YYMORE(yytext);
			}
	YY_BREAK
case 88:
YY_USER_ACTION
# line 439 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 89:
YY_USER_ACTION
# line 440 "scan.l"
{
			++linenum;
			ACTION_ECHO;
			if ( bracelevel == 0 ||
			     (doing_codeblock && indented_code) )
				{
				if ( ! doing_codeblock )
					add_action( "\tYY_BREAK\n" );
				
				doing_codeblock = false;
				BEGIN(SECT2);
				}
			}
	YY_BREAK
	/* Reject and YYmore() are checked for above, in PERCENT_BRACE_ACTION */
case 90:
YY_USER_ACTION
# line 456 "scan.l"
ACTION_ECHO; ++bracelevel;
	YY_BREAK
case 91:
YY_USER_ACTION
# line 457 "scan.l"
ACTION_ECHO; --bracelevel;
	YY_BREAK
case 92:
YY_USER_ACTION
# line 458 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 93:
YY_USER_ACTION
# line 459 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 94:
YY_USER_ACTION
# line 460 "scan.l"
ACTION_ECHO; BEGIN(ACTION_COMMENT);
	YY_BREAK
case 95:
YY_USER_ACTION
# line 461 "scan.l"
ACTION_ECHO; /* character constant */
	YY_BREAK
case 96:
YY_USER_ACTION
# line 462 "scan.l"
ACTION_ECHO; BEGIN(ACTION_STRING);
	YY_BREAK
case 97:
YY_USER_ACTION
# line 463 "scan.l"
{
			++linenum;
			ACTION_ECHO;
			if ( bracelevel == 0 )
				{
				add_action( "\tYY_BREAK\n" );
				BEGIN(SECT2);
				}
			}
	YY_BREAK
case 98:
YY_USER_ACTION
# line 472 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 99:
YY_USER_ACTION
# line 474 "scan.l"
{
			ACTION_ECHO;
			if ( doing_codeblock )
				BEGIN(CODEBLOCK_2);
			else
				BEGIN(ACTION);
			}
	YY_BREAK
case 100:
YY_USER_ACTION
# line 482 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 101:
YY_USER_ACTION
# line 483 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 102:
YY_USER_ACTION
# line 484 "scan.l"
++linenum; ACTION_ECHO;
	YY_BREAK
case 103:
YY_USER_ACTION
# line 486 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 104:
YY_USER_ACTION
# line 487 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 105:
YY_USER_ACTION
# line 488 "scan.l"
++linenum; ACTION_ECHO;
	YY_BREAK
case 106:
YY_USER_ACTION
# line 489 "scan.l"
ACTION_ECHO; BEGIN(ACTION);
	YY_BREAK
case 107:
YY_USER_ACTION
# line 490 "scan.l"
ACTION_ECHO;
	YY_BREAK
case YY_STATE_EOF(ACTION):
case YY_STATE_EOF(ACTION_COMMENT):
case YY_STATE_EOF(ACTION_STRING):
# line 492 "scan.l"
{
			synerr( "EOF encountered inside an action" );
			yyterminate();
			}
	YY_BREAK
case 108:
YY_USER_ACTION
# line 498 "scan.l"
{
			yylval = myesc( (Char *) yytext );
			return CHAR;
			}
	YY_BREAK
case 109:
YY_USER_ACTION
# line 503 "scan.l"
{
			yylval = myesc( (Char *) yytext );
			BEGIN(CCL);
			return CHAR;
			}
	YY_BREAK
case 110:
YY_USER_ACTION
# line 510 "scan.l"
ECHO;
	YY_BREAK
case YY_STATE_EOF(SECT3):
# line 511 "scan.l"
sectnum = 0; yyterminate();
	YY_BREAK
case 111:
YY_USER_ACTION
# line 513 "scan.l"
format_synerr( "bad character: %s", yytext );
	YY_BREAK
case 112:
YY_USER_ACTION
# line 515 "scan.l"
YY_FATAL_ERROR( "lex scanner jammed" );
	YY_BREAK
case YY_STATE_EOF(INITIAL):
case YY_STATE_EOF(SECT2):
case YY_STATE_EOF(CODEBLOCK):
case YY_STATE_EOF(PICKUPDEF):
case YY_STATE_EOF(SC):
case YY_STATE_EOF(CARETISBOL):
case YY_STATE_EOF(NUM):
case YY_STATE_EOF(QUOTE):
case YY_STATE_EOF(FIRSTCCL):
case YY_STATE_EOF(CCL):
case YY_STATE_EOF(RECOVER):
case YY_STATE_EOF(BRACEERROR):
case YY_STATE_EOF(C_COMMENT):
case YY_STATE_EOF(PERCENT_BRACE_ACTION):
case YY_STATE_EOF(USED_LIST):
case YY_STATE_EOF(CODEBLOCK_2):
	yyterminate();

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

		/* Undo the effects of YY_DO_BEFORE_ACTION. */
		*yy_cp = yy_hold_char;

		if ( yy_current_buffer->yy_input_file != yyin )
			{
			/* This can happen if we scan a file, yywrap() returns
			 * 1, and then later the user points yyin at a new
			 * file to resume scanning.  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 file.
			 */
			yy_current_buffer->yy_input_file = yyin;
			yy_n_chars = yy_current_buffer->yy_n_chars;
			}

		/* 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 ( yy_c_buf_p <= &yy_current_buffer->yy_ch_buf[yy_n_chars] )
			{ /* This was really a NUL. */
			yy_state_type yy_next_state;

			yy_c_buf_p = yytext_ptr + yy_amount_of_matched_text;

			yy_current_state = yy_get_previous_state();

			/* 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 );

			yy_bp = yytext_ptr + YY_MORE_ADJ;

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

			else
				{
				goto yy_find_action;
				}
			}

		else switch ( yy_get_next_buffer() )
			{
			case EOB_ACT_END_OF_FILE:
				{
				yy_did_buffer_switch_on_eof = 0;

				if ( yywrap() )
					{
					/* 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.
					 */
					yy_c_buf_p = yytext_ptr + YY_MORE_ADJ;

					yy_act = YY_STATE_EOF(YY_START);
					goto do_action;
					}

				else
					{
					if ( ! yy_did_buffer_switch_on_eof )
						YY_NEW_FILE;
					}
				break;
				}

			case EOB_ACT_CONTINUE_SCAN:
				yy_c_buf_p =
					yytext_ptr + yy_amount_of_matched_text;

				yy_current_state = yy_get_previous_state();

				yy_cp = yy_c_buf_p;
				yy_bp = yytext_ptr + YY_MORE_ADJ;
				goto yy_match;

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

				yy_current_state = yy_get_previous_state();

				yy_cp = yy_c_buf_p;
				yy_bp = 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 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()
	{
	register char *dest = yy_current_buffer->yy_ch_buf;
	register char *source = yytext_ptr - 1; /* copy prev. char, too */
	register int number_to_move, i;
	int ret_val;

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

	if ( yy_current_buffer->yy_fill_buffer == 0 )
		{ /* Don't try to fill the buffer, so this is an EOF. */
		if ( yy_c_buf_p - yytext_ptr - YY_MORE_ADJ == 1 )
			{
			/* We matched a singled characater, 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 = yy_c_buf_p - yytext_ptr;

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

	if ( yy_current_buffer->yy_eof_status !=