lex.yy.c

浙江大学编译原理课程设计源代码,高等院校计算机专业

#endif

/* Amount of stuff to slurp up with each read. */
#ifndef YY_READ_BUF_SIZE
#define YY_READ_BUF_SIZE 8192
#endif

/* Copy whatever the last rule matched to the standard output. */
#ifndef ECHO
/* This used to be an fputs(), but since the string might contain NUL's,
 * we now use fwrite().
 */
#define ECHO (void) fwrite( yytext, yyleng, 1, yyout )
#endif

/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
 * is returned in "result".
 */
#ifndef YY_INPUT
#define YY_INPUT(buf,result,max_size) \
	if ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \
		{ \
		int c = '*'; \
		size_t n; \
		for ( n = 0; n < max_size && \
			     (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
			buf[n] = (char) c; \
		if ( c == '\n' ) \
			buf[n++] = (char) c; \
		if ( c == EOF && ferror( yyin ) ) \
			YY_FATAL_ERROR( "input in flex scanner failed" ); \
		result = n; \
		} \
	else \
		{ \
		errno=0; \
		while ( (result = fread(buf, 1, max_size, yyin))==0 && ferror(yyin)) \
			{ \
			if( errno != EINTR) \
				{ \
				YY_FATAL_ERROR( "input in flex scanner failed" ); \
				break; \
				} \
			errno=0; \
			clearerr(yyin); \
			} \
		}\
\

#endif

/* No semi-colon after return; correct usage is to write "yyterminate();" -
 * we don't want an extra ';' after the "return" because that will cause
 * some compilers to complain about unreachable statements.
 */
#ifndef yyterminate
#define yyterminate() return YY_NULL
#endif

/* Number of entries by which start-condition stack grows. */
#ifndef YY_START_STACK_INCR
#define YY_START_STACK_INCR 25
#endif

/* Report a fatal error. */
#ifndef YY_FATAL_ERROR
#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )
#endif

/* end tables serialization structures and prototypes */

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL_IS_OURS 1

extern int yylex (void);

#define YY_DECL int yylex (void)
#endif /* !YY_DECL */

/* Code executed at the beginning of each rule, after yytext and yyleng
 * have been set up.
 */
#ifndef YY_USER_ACTION
#define YY_USER_ACTION
#endif

/* Code executed at the end of each rule. */
#ifndef YY_BREAK
#define YY_BREAK break;
#endif

#define YY_RULE_SETUP \
	YY_USER_ACTION

/** The main scanner function which does all the work.
 */
YY_DECL
{
	register yy_state_type yy_current_state;
	register char *yy_cp, *yy_bp;
	register int yy_act;
    
#line 34 "spl.l"

#line 695 "lex.yy.c"

	if ( !(yy_init) )
		{
		(yy_init) = 1;

#ifdef YY_USER_INIT
		YY_USER_INIT;
#endif

		if ( ! (yy_start) )
			(yy_start) = 1;	/* first start state */

		if ( ! yyin )
			yyin = stdin;

		if ( ! yyout )
			yyout = stdout;

		if ( ! YY_CURRENT_BUFFER ) {
			yyensure_buffer_stack ();
			YY_CURRENT_BUFFER_LVALUE =
				yy_create_buffer(yyin,YY_BUF_SIZE );
		}

		yy_load_buffer_state( );
		}

	while ( 1 )		/* loops until end-of-file is reached */
		{
		yy_cp = (yy_c_buf_p);

		/* Support of yytext. */
		*yy_cp = (yy_hold_char);

		/* yy_bp points to the position in yy_ch_buf of the start of
		 * the current run.
		 */
		yy_bp = yy_cp;

		yy_current_state = (yy_start);
yy_match:
		do
			{
			register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)];
			if ( yy_accept[yy_current_state] )
				{
				(yy_last_accepting_state) = yy_current_state;
				(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 >= 58 )
					yy_c = yy_meta[(unsigned int) yy_c];
				}
			yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
			++yy_cp;
			}
		while ( yy_base[yy_current_state] != 167 );

yy_find_action:
		yy_act = yy_accept[yy_current_state];
		if ( yy_act == 0 )
			{ /* have to back up */
			yy_cp = (yy_last_accepting_cpos);
			yy_current_state = (yy_last_accepting_state);
			yy_act = yy_accept[yy_current_state];
			}

		YY_DO_BEFORE_ACTION;

do_action:	/* This label is used only to access EOF actions. */

		switch ( yy_act )
	{ /* beginning of action switch */
			case 0: /* must back up */
			/* undo the effects of YY_DO_BEFORE_ACTION */
			*yy_cp = (yy_hold_char);
			yy_cp = (yy_last_accepting_cpos);
			yy_current_state = (yy_last_accepting_state);
			goto yy_find_action;

case 1:
YY_RULE_SETUP
#line 35 "spl.l"
{
			int c;
			
			/* DUMP_SOURCE */

			while ((c = input()))
			{
				if (c == '}')
				{
					break;
				}
				else if (c == '\n')
				{
					line_no ++;
				}
			}

			if (c == EOF)
				parse_error("Unexpected EOF.","");
		}
	YY_BREAK
case 2:
YY_RULE_SETUP
#line 56 "spl.l"
{
						DUMP_SOURCE
						yylval.num = stoi(yytext, 10);
						if (dump_token)
						{
							printf("token: cINTEGER, yylval.num = %d.\n", yylval.num);
						}
						return cINTEGER;
					}
	YY_BREAK
case 3:
YY_RULE_SETUP
#line 66 "spl.l"
{
						DUMP_SOURCE
						yylval.num = stoi(yytext, 8);
						if (dump_token)
						{
							printf("token: cINTEGER, yylval.num = %d.\n", yylval.num);
						}
						return cINTEGER;
					}
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 76 "spl.l"
{
						DUMP_SOURCE
						yylval.num = stoi(yytext, 16);
						if (dump_token)
						{
							printf("token: cINTEGER, yylval.num = %d.\n", yylval.num);
						}
						return cINTEGER;
					}
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 86 "spl.l"
{
						DUMP_SOURCE
						strncpy(yylval.p_char, yytext, NAME_LEN);
						if (dump_token)
						{
							printf("token: cREAL, yylval.p_char = %s.\n", yylval.p_char);
						}
						return cREAL;
					}
	YY_BREAK
case 6:
/* rule 6 can match eol */
YY_RULE_SETUP
#line 96 "spl.l"
{
						DUMP_SOURCE
						strncpy(yylval.p_char, yytext, NAME_LEN);
						if (dump_token)
						{
							printf("token: cCHAR, yylval.p_char = %s.\n", yylval.p_char);
						}
						return cCHAR;
					}
	YY_BREAK
case 7:
/* rule 7 can match eol */
YY_RULE_SETUP
#line 106 "spl.l"
{
						DUMP_SOURCE
						strncpy(yylval.p_char, yytext, NAME_LEN);
						if (dump_token)
						{
							printf("token: cSTRING, yylval.p_char = %s.\n", yylval.p_char);
						}
						return cSTRING;
					}
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 116 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oLP.\n");
						}
						return oLP; }
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 122 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oRP.\n");
						}
						return oRP; }
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 128 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oLB.\n");
						}
						return oLB; }
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 134 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oRB.\n");
						}
						return oRB; }
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 140 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oPLUS.\n");
						}
						return oPLUS; }
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 146 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oMINUS.\n");
						}
						return oMINUS; }
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 152 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oMUL.\n");
						}
						return oMUL; }
	YY_BREAK
case 15:
YY_RULE_SETUP
#line 158 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oDIV.\n");
						}
						return oDIV; }
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 164 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oASSIGN.\n");
						}
						return oASSIGN; }
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 170 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oEQUAL.\n");
						}
						return oEQUAL; }
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 176 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oLT.\n");
						}
						return oLT; }
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 182 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oGT.\n");
						}
						return oGT; }
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 188 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oLE.\n");
						}
						return oLE; }
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 194 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oGE.\n");
						}
						return oGE; }
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 200 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oUNEQU.\n");
						}
						return oUNEQU; }
	YY_BREAK
case 23:
YY_RULE_SETUP
#line 206 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oCOMMA.\n");
						}
						return oCOMMA; }
	YY_BREAK
case 24:
YY_RULE_SETUP
#line 212 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oSEMI.\n");
						}
						return oSEMI; }
	YY_BREAK
case 25:
YY_RULE_SETUP
#line 218 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oCOLON.\n");
						}
						return oCOLON; }
	YY_BREAK
case 26:
YY_RULE_SETUP
#line 224 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oQUOTE.\n");
						}
						return oQUOTE; }
	YY_BREAK
case 27:
YY_RULE_SETUP
#line 230 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oDOTDOT.\n");
						}
						return oDOTDOT; }
	YY_BREAK
case 28:
YY_RULE_SETUP
#line 236 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oDOT.\n");
						}
						return oDOT; }
	YY_BREAK
case 29:
YY_RULE_SETUP
#line 242 "spl.l"
{ DUMP_SOURCE 
						if (dump_token)
						{
							printf("token: oARROW.\n");
						}
						return oARROW; }
	YY_BREAK
case 30:
YY_RULE_SETUP
#line 248 "spl.l"
{
						DUMP_SOURCE
						strncpy(yylval.p_char, yytext, NAME_LEN);
						return id_or_keyword(yytext);
					}
	YY_BREAK
case 31:
/* rule 31 can match eol */
YY_RULE_SETUP
#line 253 "spl.l"
{
						line_no++;
						line_pos = 0;
						line_buf[line_pos] = 0;
					}
	YY_BREAK
case 32:
YY_RULE_SETUP
#line 258 "spl.l"
{
						DUMP_SOURCE
					}
	YY_BREAK
case 33:
YY_RULE_SETUP
#line 261 "spl.l"
ECHO;
	YY_BREAK
#line 1133 "lex.yy.c"
case YY_STATE_EOF(INITIAL):
	yyterminate();

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

		/* Undo the effects of YY_DO_BEFORE_ACTION. */
		*yy_cp = (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
			 * 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.
			 */
			(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 ( (yy_c_buf_p) <= &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
			{ /* This was really a NUL. */
			yy_state_type yy_next_state;