lex.yy.c

使用yacc和lex编写的cmm语言的词法分析和语法分析程序.

 * any uses of REJECT which flex missed.
 */
#define REJECT reject_used_but_not_detected
#define yymore() yymore_used_but_not_detected
#define YY_MORE_ADJ 0
#define YY_RESTORE_YY_MORE_OFFSET
char *yytext;
#line 1 "lcmm.l"
#line 2 "lcmm.l"

#include <stdio.h>
#include "y.tab.h"
#include "tree.h"

void comment();

#line 524 "lex.yy.c"

#define INITIAL 0

#ifndef YY_NO_UNISTD_H
/* Special case for "unistd.h", since it is non-ANSI. We include it way
 * down here because we want the user's section 1 to have been scanned first.
 * The user has a chance to override it with an option.
 */
#include <unistd.h>
#endif

#ifndef YY_EXTRA_TYPE
#define YY_EXTRA_TYPE void *
#endif

static int yy_init_globals (void );

/* Accessor methods to globals.
   These are made visible to non-reentrant scanners for convenience. */

int yylex_destroy (void );

int yyget_debug (void );

void yyset_debug (int debug_flag  );

YY_EXTRA_TYPE yyget_extra (void );

void yyset_extra (YY_EXTRA_TYPE user_defined  );

FILE *yyget_in (void );

void yyset_in  (FILE * in_str  );

FILE *yyget_out (void );

void yyset_out  (FILE * out_str  );

int yyget_leng (void );

char *yyget_text (void );

int yyget_lineno (void );

void yyset_lineno (int line_number  );

/* Macros after this point can all be overridden by user definitions in
 * section 1.
 */

#ifndef YY_SKIP_YYWRAP
#ifdef __cplusplus
extern "C" int yywrap (void );
#else
extern int yywrap (void );
#endif
#endif

    static void yyunput (int c,char *buf_ptr  );
    
#ifndef yytext_ptr
static void yy_flex_strncpy (char *,yyconst char *,int );
#endif

#ifdef YY_NEED_STRLEN
static int yy_flex_strlen (yyconst char * );
#endif

#ifndef YY_NO_INPUT

#ifdef __cplusplus
static int yyinput (void );
#else
static int input (void );
#endif

#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 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 = '*'; \
		int 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 15 "lcmm.l"


#line 709 "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 >= 70 )
					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] != 86 );

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;

		if ( yy_act != YY_END_OF_BUFFER && yy_rule_can_match_eol[yy_act] )
			{
			int yyl;
			for ( yyl = 0; yyl < yyleng; ++yyl )
				if ( yytext[yyl] == '\n' )
					   
    yylineno++;
;
			}

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 17 "lcmm.l"
{comment();}
	YY_BREAK
case 2:
YY_RULE_SETUP
#line 19 "lcmm.l"
{return INT;}
	YY_BREAK
case 3:
YY_RULE_SETUP
#line 20 "lcmm.l"
{return REAL;}
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 21 "lcmm.l"
{return WHILE;}
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 22 "lcmm.l"
{return WRITE;}
	YY_BREAK
case 6:
YY_RULE_SETUP
#line 23 "lcmm.l"
{return READ;}
	YY_BREAK
case 7:
YY_RULE_SETUP
#line 24 "lcmm.l"
{return IF;}
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 25 "lcmm.l"
{return ELSE;}
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 27 "lcmm.l"
{
                              yylval.ttype = make_node(IDENTIFIER_NODE);
                              yylval.ttype->identifier.name = strdup(yytext);
                              return IDENTIFIER;
                        }
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 32 "lcmm.l"
{       
                              yylval.ttype = make_node(INTEGER_CST);
                              yylval.ttype->int_cst.value = atoi(yytext);
                              return CONSTANT;
                        }
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 37 "lcmm.l"
{
                              yylval.ttype = make_node(REAL_CST);
                              yylval.ttype->real_cst.value = atof(yytext);
                              return CONSTANT;
                        }
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 43 "lcmm.l"
{return GE_OP;}
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 44 "lcmm.l"
{return LE_OP;}
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 45 "lcmm.l"
{return EQ_OP;}
	YY_BREAK
case 15:
YY_RULE_SETUP
#line 46 "lcmm.l"
{return NE_OP;}
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 47 "lcmm.l"
{return AND_OP;}
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 48 "lcmm.l"
{return OR_OP;}
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 50 "lcmm.l"
{return '&';}
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 51 "lcmm.l"
{return '^';}
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 52 "lcmm.l"
{return '|';}
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 53 "lcmm.l"
{return '>';}
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 54 "lcmm.l"
{return '<';}
	YY_BREAK
case 23:
YY_RULE_SETUP
#line 55 "lcmm.l"
{return '=';}
	YY_BREAK
case 24:
YY_RULE_SETUP
#line 56 "lcmm.l"
{return '+';}
	YY_BREAK
case 25:
YY_RULE_SETUP
#line 57 "lcmm.l"
{return '-';}
	YY_BREAK
case 26:
YY_RULE_SETUP
#line 58 "lcmm.l"
{return '*';}
	YY_BREAK
case 27:
YY_RULE_SETUP
#line 59 "lcmm.l"
{return '/';}
	YY_BREAK
case 28:
YY_RULE_SETUP
#line 60 "lcmm.l"
{return '(';}
	YY_BREAK
case 29:
YY_RULE_SETUP
#line 61 "lcmm.l"
{return ')';}
	YY_BREAK
case 30:
YY_RULE_SETUP
#line 62 "lcmm.l"
{return '{';}
	YY_BREAK
case 31:
YY_RULE_SETUP
#line 63 "lcmm.l"
{return '}';}
	YY_BREAK
case 32:
YY_RULE_SETUP
#line 64 "lcmm.l"
{return '[';}
	YY_BREAK
case 33:
YY_RULE_SETUP
#line 65 "lcmm.l"
{return ']';}
	YY_BREAK
case 34:
YY_RULE_SETUP
#line 66 "lcmm.l"
{return ';';}
	YY_BREAK
case 35:
YY_RULE_SETUP
#line 67 "lcmm.l"
{return ':';}
	YY_BREAK
case 36:
YY_RULE_SETUP
#line 68 "lcmm.l"
{return ',';}
	YY_BREAK
case 37:
/* rule 37 can match eol */
YY_RULE_SETUP
#line 70 "lcmm.l"
{ /* ignore whitespace */ }
	YY_BREAK
case 38:
YY_RULE_SETUP
#line 71 "lcmm.l"
{ /* ignore bad characters */ } 
	YY_BREAK
case 39:
YY_RULE_SETUP
#line 72 "lcmm.l"
ECHO;
	YY_BREAK
#line 1010 "lex.yy.c"
case YY_STATE_EOF(INITIAL):
	yyterminate();