lex.yy.c

运用flex自动生成词法分析器。包含源代码和使用文档

static yy_state_type yy_last_accepting_state;
static char *yy_last_accepting_cpos;

/* The intent behind this definition is that it'll catch
 * 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
char *yytext;
#line 1 "mylex.l"
#define INITIAL 0
#line 2 "mylex.l"
#include "stdlib.h"
#include "stdio.h"
#define KW "0x103"
#define IDTF "0x104"
#define BL "0x105"
#define CHR "0x106"
#define INTEGER "0x107"
#define FLT "0x108"
#define STR "0x109"
#define EVA "0x110"
#define EQU "0x117"

/* 一行内既有代码又有注释, 则codeno,commentno都加一 */
int lineno = 0;        /* 总行数 */
int emptylineno = 0;    /* 空行数 */
int codeno = 0;        /* 代码行数 */
int commentno = 0;    /* 注释行数 */
int is_comment = 0;    /* 该行是否为注释 */
int in_comment = 0;    /* 是否在注释内,主要考虑跨行的注释代码 */
int is_code = 0;    /* 该行是否为代码 */
int token_num=0;/*总单词数*/
int pre_tk_num=0;
int tk_pline=0;
#line 570 "lex.yy.c"

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

#ifndef YY_SKIP_YYWRAP
#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

#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 \
	YY_USER_ACTION

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

#line 57 "mylex.l"


#line 720 "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_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 >= 253 )
					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] != 391 );

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 59 "mylex.l"
{/*no action and no return*/}
	YY_BREAK
case 2:
YY_RULE_SETUP
#line 60 "mylex.l"
{ in_comment = 2; is_comment = 1; } /* 匹配以//开始的注释 */
	YY_BREAK
case 3:
YY_RULE_SETUP
#line 61 "mylex.l"
{ in_comment = 1; is_comment = 1; } /* 匹配另一种注释 */
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 62 "mylex.l"
{ in_comment = 0; is_comment = 1; }  /*40*/
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 63 "mylex.l"
{ /* 一行结束了,分析这行的属性 */
        lineno++;
        if (!is_comment && !is_code)/*如果不是注释也不是代码，那就是空格行*/
            {
		emptylineno++;
 	    }
        else
        {
            if (is_comment)
                commentno++;
            if (is_code)
                codeno++;
        }
        is_comment = 0;
        is_code = 0;
	if(in_comment == 2)     in_comment=0;
	tk_pline = token_num-pre_tk_num;
	printf("---->%d tokens in line %d.\n",tk_pline,lineno);
	fprintf(yyout,"---->%d tokens in line %d.\n",tk_pline,lineno);
	pre_tk_num = token_num;
      }
	YY_BREAK
case 6:
YY_RULE_SETUP
#line 84 "mylex.l"
{
        if (in_comment) is_comment = 1;
	else 
	{
	     is_code = 1;

	     token_num++;
	     printf("line %d:(%s,%s)\n",lineno+1,BL,yytext);
             fprintf(yyout,"line %d:(%s,%s)\n",lineno+1,BL,yytext);
	}
      }
	YY_BREAK
case 7:
YY_RULE_SETUP
#line 95 "mylex.l"
{
	if (in_comment)     is_comment = 1; 
	else 
	{
	     is_code = 1;

	     token_num++;
	     printf("line %d:(%s,%s)\n",lineno+1,KW,yytext);
             fprintf(yyout,"line %d:(%s,%s)\n",lineno+1,KW,yytext);
	}
      }
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 106 "mylex.l"
{
		if (in_comment)     is_comment = 1; 
	        else 
	        {
	               is_code = 1;

	     	       token_num++;
	   	       printf("line %d:(%s,%s)\n",lineno+1,IDTF,yytext);
                       fprintf(yyout,"line %d:(%s,%s)\n",lineno+1,IDTF,yytext);
	        }
	     }
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 117 "mylex.l"
{
		  if (in_comment)     is_comment = 1; 
	          else 
	          {
	               is_code = 1;

	               token_num++;
	   	       printf("line %d:(%s,%s)\n",lineno+1,CHR,yytext);
                       fprintf(yyout,"line %d:(%s,%s)\n",lineno+1,CHR,yytext);
	          }
              }
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 128 "mylex.l"
{
		if (in_comment)     is_comment = 1; 
	        else 
	        {
	               is_code = 1;

	               token_num++;
	   	       printf("line %d:(%s,%s)\n",lineno+1,STR,yytext);
                       fprintf(yyout,"line %d:(%s,%s)\n",lineno+1,STR,yytext);
                }
           }
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 139 "mylex.l"
{
	        if (in_comment) is_comment = 1; 
	 	else 
		 {
	 	    is_code = 1;

	            token_num++;
	  	    printf("line %d:(%s,%s)\n",lineno+1,INTEGER,yytext);
       		    fprintf(yyout,"line %d:(%s,%s)\n",lineno+1,INTEGER,yytext);
		 }
           }
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 150 "mylex.l"
{
	        if (in_comment) is_comment = 1; 
	 	else 
		 {
	 	    is_code = 1;

	            token_num++;
	  	    printf("line %d:(%s,%s)\n",lineno+1,FLT,yytext);
       		    fprintf(yyout,"line %d:(%s,%s)\n",lineno+1,FLT,yytext);
		 }
        }
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 161 "mylex.l"
{
		if (in_comment) is_comment = 1; 
	 	else 
		 {
	 	    is_code = 1;

	            token_num++;
	  	    printf("line %d:(%s,%s)\n",lineno+1,EVA,yytext);
       		    fprintf(yyout,"line %d:(%s,%s)\n",lineno+1,EVA,yytext);
		 }
         }
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 172 "mylex.l"
{
		if (in_comment) is_comment = 1; 
	 	else 
		 {
	 	    is_code = 1;

	            token_num++;
	  	    printf("line %d:(0x111,%s)\n",lineno+1,yytext);
       		    fprintf(yyout,"line %d:(0x111,%s)\n",lineno+1,yytext);
		 }
          }
	YY_BREAK
case 15:
YY_RULE_SETUP
#line 183 "mylex.l"
{
		if (in_comment) is_comment = 1; 
	 	else 
		 {
	 	    is_code = 1;

	            token_num++;
	  	    printf("line %d:(0x112,%s)\n",lineno+1,yytext);
       		    fprintf(yyout,"line %d:(0x112,%s)\n",lineno+1,yytext);
		 }
          }
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 194 "mylex.l"
{
		if (in_comment) is_comment = 1; 
	 	else 
		 {
	 	    is_code = 1;

	            token_num++;
	  	    printf("line %d:(0x113,%s)\n",lineno+1,yytext);
       		    fprintf(yyout,"line %d:(0x113,%s)\n",lineno+1,yytext);
		 }
          }
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 205 "mylex.l"
{
		if (in_comment) is_comment = 1; 
	 	else 
		 {
	 	    is_code = 1;

	            token_num++;
	   	    printf("line %d:(0x114,%s)\n",lineno+1,yytext);
       		    fprintf(yyout,"line %d:(0x114,%s)\n",lineno+1,yytext);
		 }
          }
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 216 "mylex.l"
{
		if (in_comment) is_comment = 1; 
	 	else 
		 {
	 	    is_code = 1;

	      	    token_num++;
	  	    printf("line %d:(0x115,%s)\n",lineno+1,yytext);
       		    fprintf(yyout,"line %d:(0x115,%s)\n",lineno+1,yytext);
		 }
          }
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 227 "mylex.l"
{
		if (in_comment) is_comment = 1; 
	 	else 
		 {
	 	    is_code = 1;

	            token_num++;
	  	    printf("line %d:(0x116,%s)\n",lineno+1,yytext);
       		    fprintf(yyout,"line %d:(0x116,%s)\n",lineno+1,yytext);
		 }
          }
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 238 "mylex.l"
{
		if (in_comment) is_comment = 1; 
	 	else