lex.yy.c

C语言表达式语法分析器

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

#ifndef YY_NO_UNPUT
static void yyunput YY_PROTO(( int c, char *buf_ptr ));
#endif

#ifndef yytext_ptr
static void yy_flex_strncpy YY_PROTO(( char *, yyconst char *, int ));
#endif

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

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

#if YY_STACK_USED
static int yy_start_stack_ptr = 0;
static int yy_start_stack_depth = 0;
static int *yy_start_stack = 0;
#ifndef YY_NO_PUSH_STATE
static void yy_push_state YY_PROTO(( int new_state ));
#endif
#ifndef YY_NO_POP_STATE
static void yy_pop_state YY_PROTO(( void ));
#endif
#ifndef YY_NO_TOP_STATE
static int yy_top_state YY_PROTO(( void ));
#endif

#else
#define YY_NO_PUSH_STATE 1
#define YY_NO_POP_STATE 1
#define YY_NO_TOP_STATE 1
#endif

#ifdef YY_MALLOC_DECL
YY_MALLOC_DECL
#else
#if __STDC__
#ifndef __cplusplus
#include <stdlib.h>
#endif
#else
/* Just try to get by without declaring the routines.  This will fail
 * miserably on non-ANSI systems for which sizeof(size_t) != sizeof(int)
 * or sizeof(void*) != sizeof(int).
 */
#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 (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->yy_is_interactive ) \
		{ \
		int c = '*', 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 if ( ((result = fread( buf, 1, max_size, yyin )) == 0) \
		  && ferror( yyin ) ) \
		YY_FATAL_ERROR( "input in flex scanner failed" );
#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

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL int yylex YY_PROTO(( void ))
#endif

/* 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 \
	if ( yyleng > 0 ) \
		yy_current_buffer->yy_at_bol = \
				(yytext[yyleng - 1] == '\n'); \
	YY_USER_ACTION

YY_DECL
	{
	register yy_state_type yy_current_state;
	register char *yy_cp, *yy_bp;
	register int yy_act;

#line 22 "lex"

#line 668 "lex.yy.c"

	if ( yy_init )
		{
		yy_init = 0;

#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 )
			yy_current_buffer =
				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_current_state += YY_AT_BOL();
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 >= 152 )
					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] != 284 );

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 23 "lex"
{showData("help");}
	YY_BREAK
case 2:
YY_RULE_SETUP
#line 24 "lex"
{/*show_all_func();*/showData("function");}
	YY_BREAK
case 3:
YY_RULE_SETUP
#line 25 "lex"
{show_all_sym();}
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 26 "lex"
{yylval.ext=-1;return(EXIT_YY);}
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 27 "lex"
{BEGIN(file_clear);}
	YY_BREAK
case 6:
YY_RULE_SETUP
#line 28 "lex"
{BEGIN(file_input);}
	YY_BREAK
case 7:
YY_RULE_SETUP
#line 29 "lex"
{BEGIN(INITIAL);								
																											fp=fopen(yytext,"r");
																											if(!fp)printf("File %s is no exist!\n",yytext);
																											{	if(strcmp(yytext,"out")==0&&strlen("out")==yyleng){fout=freopen("out2","a+",fout);}
																												strcpy(file_name,yytext);
																												/*system("cls");*/
																												printf("You have input file:%s\n",yytext);
																												showData(yytext);
																												yyin=fp;
																											}
																							}
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 40 "lex"
{BEGIN(file_type);}
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 41 "lex"
{BEGIN(INITIAL);								
																												fp=fopen(yytext,"r");
																												if(!fp)printf("File %s is no exist!\n",yytext);
																												else 
																												{
																												/*system("cls");*/
																												printf("You have input file:%s\n",yytext);
																												showData(yytext);
																												}
																												}
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 51 "lex"
{BEGIN(INITIAL);
																												char c;
																												printf("do you want to clear it:(Y/N)");
																												if((c=getchar())=='Y'||c=='y')								
																												{fp=fopen(yytext,"w");
																												fclose(fp);
																												printf("file cleared!\n");
																												}
																											}																													
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 60 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(SIZEOF); }
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 61 "lex"
{ symrec *s;
										      s=getsym(yytext);
													if(s==0)
															{	s=putsym(yytext,IDENTIFIER,-1);
														 		yylval.tptr=s;
														 		return IDENTIFIER;
															}
													else if(s->type==FUNCTION)
															{	yylval.tptr=s;
																return FUNCTION;
															}
													else if(s->type==IDENTIFIER)
															{	yylval.tptr=s;
																return IDENTIFIER;
															}
												} 
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 78 "lex"
{ yylval.val=atof(yytext);        
        								 	return(CONSTANT); } 
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 81 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(RIGHT_ASSIGN); } 
	YY_BREAK
case 15:
YY_RULE_SETUP
#line 82 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(LEFT_ASSIGN); } 
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 83 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(ADD_ASSIGN); } 
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 84 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(SUB_ASSIGN); } 
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 85 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(MUL_ASSIGN); } 
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 86 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(DIV_ASSIGN); } 
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 87 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(MOD_ASSIGN); } 
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 88 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(AND_ASSIGN); } 
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 89 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(XOR_ASSIGN); } 
	YY_BREAK
case 23:
YY_RULE_SETUP
#line 90 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(OR_ASSIGN); } 
	YY_BREAK
case 24:
YY_RULE_SETUP
#line 91 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(RIGHT_OP); } 
	YY_BREAK
case 25:
YY_RULE_SETUP
#line 92 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(LEFT_OP); } 
	YY_BREAK
case 26:
YY_RULE_SETUP
#line 93 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(INC_OP); } 
	YY_BREAK
case 27:
YY_RULE_SETUP
#line 94 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(DEC_OP); } 
	YY_BREAK
case 28:
YY_RULE_SETUP
#line 95 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(PTR_OP); } 
	YY_BREAK
case 29:
YY_RULE_SETUP
#line 96 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(AND_OP); } 
	YY_BREAK
case 30:
YY_RULE_SETUP
#line 97 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(OR_OP); } 
	YY_BREAK
case 31:
YY_RULE_SETUP
#line 98 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(LE_OP); } 
	YY_BREAK
case 32:
YY_RULE_SETUP
#line 99 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(GE_OP); } 
	YY_BREAK
case 33:
YY_RULE_SETUP
#line 100 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(EQ_OP); } 
	YY_BREAK
case 34:
YY_RULE_SETUP
#line 101 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(NE_OP); } 
	YY_BREAK
case 35:
YY_RULE_SETUP
#line 102 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(','); } 
	YY_BREAK
case 36:
YY_RULE_SETUP
#line 103 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('='); } 
	YY_BREAK
case 37:
YY_RULE_SETUP
#line 104 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('('); } 
	YY_BREAK
case 38:
YY_RULE_SETUP
#line 105 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(')'); } 
	YY_BREAK
case 39:
YY_RULE_SETUP
#line 106 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('['); } 
	YY_BREAK
case 40:
YY_RULE_SETUP
#line 107 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return(']'); } 
	YY_BREAK
case 41:
YY_RULE_SETUP
#line 108 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('.'); } 
	YY_BREAK
case 42:
YY_RULE_SETUP
#line 109 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('&'); } 
	YY_BREAK
case 43:
YY_RULE_SETUP
#line 110 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('!'); } 
	YY_BREAK
case 44:
YY_RULE_SETUP
#line 111 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('~'); } 
	YY_BREAK
case 45:
YY_RULE_SETUP
#line 112 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('-'); } 
	YY_BREAK
case 46:
YY_RULE_SETUP
#line 113 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('+'); } 
	YY_BREAK
case 47:
YY_RULE_SETUP
#line 114 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('*'); } 
	YY_BREAK
case 48:
YY_RULE_SETUP
#line 115 "lex"
{ yylval.valc=(char *)malloc(255);strcpy(yylval.valc,yytext); return('/'); } 
	YY_BREAK
case 49: