lex.yy.c

一个词法分析实验的源代码

/* A lexical scanner generated by flex */

/* Scanner skeleton version:
 * $Header: /home/daffy/u0/vern/flex/RCS/flex.skl,v 2.91 96/09/10 16:58:48 vern Exp $
 */

#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 5

#include <stdio.h>


/* cfront 1.2 defines "c_plusplus" instead of "__cplusplus" */
#ifdef c_plusplus
#ifndef __cplusplus
#define __cplusplus
#endif
#endif


#ifdef __cplusplus

#include <stdlib.h>
#include <unistd.h>

/* Use prototypes in function declarations. */
#define YY_USE_PROTOS

/* The "const" storage-class-modifier is valid. */
#define YY_USE_CONST

#else	/* ! __cplusplus */

#if __STDC__

#define YY_USE_PROTOS
#define YY_USE_CONST

#endif	/* __STDC__ */
#endif	/* ! __cplusplus */

#ifdef __TURBOC__
 #pragma warn -rch
 #pragma warn -use
#include <io.h>
#include <stdlib.h>
#define YY_USE_CONST
#define YY_USE_PROTOS
#endif

#ifdef YY_USE_CONST
#define yyconst const
#else
#define yyconst
#endif


#ifdef YY_USE_PROTOS
#define YY_PROTO(proto) proto
#else
#define YY_PROTO(proto) ()
#endif

/* Returned upon end-of-file. */
#define YY_NULL 0

/* Promotes a possibly negative, possibly signed char to an unsigned
 * integer for use as an array index.  If the signed char is negative,
 * we want to instead treat it as an 8-bit unsigned char, hence the
 * double cast.
 */
#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)

/* Enter a start condition.  This macro really ought to take a parameter,
 * but we do it the disgusting crufty way forced on us by the ()-less
 * definition of BEGIN.
 */
#define BEGIN yy_start = 1 + 2 *

/* Translate the current start state into a value that can be later handed
 * to BEGIN to return to the state.  The YYSTATE alias is for lex
 * compatibility.
 */
#define YY_START ((yy_start - 1) / 2)
#define YYSTATE YY_START

/* Action number for EOF rule of a given start state. */
#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)

/* Special action meaning "start processing a new file". */
#define YY_NEW_FILE yyrestart( yyin )

#define YY_END_OF_BUFFER_CHAR 0

/* Size of default input buffer. */
#define YY_BUF_SIZE 16384

typedef struct yy_buffer_state *YY_BUFFER_STATE;

extern int yyleng;
extern FILE *yyin, *yyout;

#define EOB_ACT_CONTINUE_SCAN 0
#define EOB_ACT_END_OF_FILE 1
#define EOB_ACT_LAST_MATCH 2

/* The funky do-while in the following #define is used to turn the definition
 * int a single C statement (which needs a semi-colon terminator).  This
 * avoids problems with code like:
 *
 * 	if ( condition_holds )
 *		yyless( 5 );
 *	else
 *		do_something_else();
 *
 * Prior to using the do-while the compiler would get upset at the
 * "else" because it interpreted the "if" statement as being all
 * done when it reached the ';' after the yyless() call.
 */

/* Return all but the first 'n' matched characters back to the input stream. */

#define yyless(n) \
	do \
		{ \
		/* Undo effects of setting up yytext. */ \
		*yy_cp = yy_hold_char; \
		YY_RESTORE_YY_MORE_OFFSET \
		yy_c_buf_p = yy_cp = yy_bp + n - YY_MORE_ADJ; \
		YY_DO_BEFORE_ACTION; /* set up yytext again */ \
		} \
	while ( 0 )

#define unput(c) yyunput( c, yytext_ptr )

/* The following is because we cannot portably get our hands on size_t
 * (without autoconf's help, which isn't available because we want
 * flex-generated scanners to compile on their own).
 */
typedef unsigned int yy_size_t;


struct yy_buffer_state
	{
	FILE *yy_input_file;

	char *yy_ch_buf;		/* input buffer */
	char *yy_buf_pos;		/* current position in input buffer */

	/* Size of input buffer in bytes, not including room for EOB
	 * characters.
	 */
	yy_size_t yy_buf_size;

	/* Number of characters read into yy_ch_buf, not including EOB
	 * characters.
	 */
	int yy_n_chars;

	/* Whether we "own" the buffer - i.e., we know we created it,
	 * and can realloc() it to grow it, and should free() it to
	 * delete it.
	 */
	int yy_is_our_buffer;

	/* Whether this is an "interactive" input source; if so, and
	 * if we're using stdio for input, then we want to use getc()
	 * instead of fread(), to make sure we stop fetching input after
	 * each newline.
	 */
	int yy_is_interactive;

	/* Whether we're considered to be at the beginning of a line.
	 * If so, '^' rules will be active on the next match, otherwise
	 * not.
	 */
	int yy_at_bol;

	/* Whether to try to fill the input buffer when we reach the
	 * end of it.
	 */
	int yy_fill_buffer;

	int yy_buffer_status;
#define YY_BUFFER_NEW 0
#define YY_BUFFER_NORMAL 1
	/* When an EOF's been seen but there's still some text to process
	 * then we mark the buffer as YY_EOF_PENDING, to indicate that we
	 * shouldn't try reading from the input source any more.  We might
	 * still have a bunch of tokens to match, though, because of
	 * possible backing-up.
	 *
	 * When we actually see the EOF, we change the status to "new"
	 * (via yyrestart()), so that the user can continue scanning by
	 * just pointing yyin at a new input file.
	 */
#define YY_BUFFER_EOF_PENDING 2
	};

static YY_BUFFER_STATE yy_current_buffer = 0;

/* We provide macros for accessing buffer states in case in the
 * future we want to put the buffer states in a more general
 * "scanner state".
 */
#define YY_CURRENT_BUFFER yy_current_buffer


/* yy_hold_char holds the character lost when yytext is formed. */
static char yy_hold_char;

static int yy_n_chars;		/* number of characters read into yy_ch_buf */


int yyleng;

/* Points to current character in buffer. */
static char *yy_c_buf_p = (char *) 0;
static int yy_init = 1;		/* whether we need to initialize */
static int yy_start = 0;	/* start state number */

/* Flag which is used to allow yywrap()'s to do buffer switches
 * instead of setting up a fresh yyin.  A bit of a hack ...
 */
static int yy_did_buffer_switch_on_eof;

void yyrestart YY_PROTO(( FILE *input_file ));

void yy_switch_to_buffer YY_PROTO(( YY_BUFFER_STATE new_buffer ));
void yy_load_buffer_state YY_PROTO(( void ));
YY_BUFFER_STATE yy_create_buffer YY_PROTO(( FILE *file, int size ));
void yy_delete_buffer YY_PROTO(( YY_BUFFER_STATE b ));
void yy_init_buffer YY_PROTO(( YY_BUFFER_STATE b, FILE *file ));
void yy_flush_buffer YY_PROTO(( YY_BUFFER_STATE b ));
#define YY_FLUSH_BUFFER yy_flush_buffer( yy_current_buffer )

YY_BUFFER_STATE yy_scan_buffer YY_PROTO(( char *base, yy_size_t size ));
YY_BUFFER_STATE yy_scan_string YY_PROTO(( yyconst char *yy_str ));
YY_BUFFER_STATE yy_scan_bytes YY_PROTO(( yyconst char *bytes, int len ));

static void *yy_flex_alloc YY_PROTO(( yy_size_t ));
static void *yy_flex_realloc YY_PROTO(( void *, yy_size_t ));
static void yy_flex_free YY_PROTO(( void * ));

#define yy_new_buffer yy_create_buffer

#define yy_set_interactive(is_interactive) \
	{ \
	if ( ! yy_current_buffer ) \
		yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \
	yy_current_buffer->yy_is_interactive = is_interactive; \
	}

#define yy_set_bol(at_bol) \
	{ \
	if ( ! yy_current_buffer ) \
		yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \
	yy_current_buffer->yy_at_bol = at_bol; \
	}

#define YY_AT_BOL() (yy_current_buffer->yy_at_bol)

typedef unsigned char YY_CHAR;
FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;
typedef int yy_state_type;
extern char *yytext;
#define yytext_ptr yytext

static yy_state_type yy_get_previous_state YY_PROTO(( void ));
static yy_state_type yy_try_NUL_trans YY_PROTO(( yy_state_type current_state ));
static int yy_get_next_buffer YY_PROTO(( void ));
static void yy_fatal_error YY_PROTO(( yyconst char msg[] ));

/* Done after the current pattern has been matched and before the
 * corresponding action - sets up yytext.
 */
#define YY_DO_BEFORE_ACTION \
	yytext_ptr = yy_bp; \
	yyleng = (int) (yy_cp - yy_bp); \
	yy_hold_char = *yy_cp; \
	*yy_cp = '\0'; \
	yy_c_buf_p = yy_cp;

#define YY_NUM_RULES 10
#define YY_END_OF_BUFFER 11
static yyconst short int yy_accept[60] =
    {   0,
        0,    0,   11,    9,    8,    8,    5,    6,    1,    4,
        4,    4,    4,    4,    4,    4,    4,    4,    4,    4,
        4,    9,    8,    2,    1,    4,    4,    4,    4,    3,
        4,    4,    4,    4,    4,    4,    4,    4,    0,    7,
        2,    4,    4,    4,    4,    4,    4,    4,    4,    4,
        4,    4,    4,    4,    4,    4,    4,    4,    0
    } ;

static yyconst int yy_ec[256] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    2,    1,    1,    1,    1,    1,    1,    1,    4,
        5,    6,    7,    8,    9,   10,   11,   12,   12,   12,
       12,   12,   12,   12,   12,   12,   12,    1,   13,    1,
       14,    1,    1,    1,   15,   15,   15,   15,   15,   15,
       15,   15,   15,   15,   15,   15,   15,   15,   15,   15,
       15,   15,   15,   15,   15,   15,   15,   15,   15,   15,
        1,    1,    1,    1,    1,    1,   16,   17,   18,   19,

       20,   21,   22,   23,   24,   15,   15,   25,   15,   26,
       27,   28,   15,   29,   30,   31,   32,   33,   34,   15,
       15,   15,   35,    1,   36,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,

        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1
    } ;

static yyconst int yy_meta[37] =
    {   0,
        1,    1,    2,    1,    1,    1,    1,    1,    1,    1,
        1,    3,    1,    1,    3,    3,    3,    3,    3,    3,
        3,    3,    3,    3,    3,    3,    3,    3,    3,    3,
        3,    3,    3,    3,    1,    1
    } ;

static yyconst short int yy_base[62] =
    {   0,
        0,    0,   95,   96,   35,   37,   96,   96,   31,    0,
       74,   26,   66,   66,   70,   71,   60,   68,   64,   70,
       21,   49,   43,   72,   37,    0,   61,   57,   55,    0,
       61,   60,   51,   61,   56,   46,   50,   49,   36,   96,
       59,   46,   44,   38,   49,   47,   39,   39,   32,   36,
       30,   40,   39,   38,   38,   23,   23,   31,   96,   45,
       53
    } ;

static yyconst short int yy_def[62] =
    {   0,
       59,    1,   59,   59,   59,   59,   59,   59,   59,   60,
       60,   60,   60,   60,   60,   60,   60,   60,   60,   60,
       60,   61,   59,   59,   59,   60,   60,   60,   60,   60,
       60,   60,   60,   60,   60,   60,   60,   60,   61,   59,
       59,   60,   60,   60,   60,   60,   60,   60,   60,   60,
       60,   60,   60,   60,   60,   60,   60,   60,    0,   59,
       59
    } ;

static yyconst short int yy_nxt[133] =
    {   0,
        4,    5,    6,    7,    7,    7,    7,    8,    7,    4,
        7,    9,    8,    7,   10,   10,   11,   12,   13,   14,
       10,   10,   10,   15,   10,   10,   16,   17,   18,   10,
       19,   10,   20,   21,   22,    4,   23,   23,   23,   23,
       24,   28,   25,   37,   23,   23,   24,   26,   25,   38,
       30,   58,   29,   39,   57,   39,   56,   30,   30,   55,
       30,   30,   54,   53,   30,   30,   52,   51,   30,   50,
       41,   40,   49,   48,   30,   47,   46,   45,   30,   30,
       44,   43,   42,   41,   40,   36,   35,   34,   33,   32,
       30,   31,   30,   27,   59,    3,   59,   59,   59,   59,

       59,   59,   59,   59,   59,   59,   59,   59,   59,   59,
       59,   59,   59,   59,   59,   59,   59,   59,   59,   59,
       59,   59,   59,   59,   59,   59,   59,   59,   59,   59,
       59,   59
    } ;

static yyconst short int yy_chk[133] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    5,    5,    6,    6,
        9,   12,    9,   21,   23,   23,   25,   60,   25,   21,
       58,   57,   12,   61,   56,   61,   55,   54,   53,   52,
       51,   50,   49,   48,   47,   46,   45,   44,   43,   42,
       41,   39,   38,   37,   36,   35,   34,   33,   32,   31,
       29,   28,   27,   24,   22,   20,   19,   18,   17,   16,
       15,   14,   13,   11,    3,   59,   59,   59,   59,   59,

       59,   59,   59,   59,   59,   59,   59,   59,   59,   59,
       59,   59,   59,   59,   59,   59,   59,   59,   59,   59,
       59,   59,   59,   59,   59,   59,   59,   59,   59,   59,
       59,   59
    } ;

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
#define YY_RESTORE_YY_MORE_OFFSET
char *yytext;
#line 1 "number1.l"
#define INITIAL 0
#line 2 "number1.l"
#include <string.h>
#include <stdlib.h>
#define LEN sizeof(struct ident)

struct ident
{
	char *str;
	int num;
	struct ident *next;
};
struct ident *Keyword=NULL; 
struct ident *Identifier=NULL;
FILE *fp;
char *Integer[100];
char *Float[100];
int IntNum=0, FloatNum=0,OperNum=0,SymNum=0;  //这些用来计数

void InsertKey(char *newone)
{
	struct ident *p,*q;
	struct ident *news;
	if(strcmp(newone,Keyword->str)==0)
	{
		Keyword->num++;
		return;
	}
    p=Keyword;
    q=Keyword;
    p=p->next;
    while(p!=NULL)
    {
		if( strcmp(newone,p->str)==0)
			break;
		p=p->next;
	    q=q->next;
	}
	if(p==NULL)
	{
		news=(struct ident *)malloc(LEN);
		news->str=(char *)malloc(sizeof(newone)+1);
	    strcpy(news->str,newone);
	   	news->num=1;
	   	q->next=news;
	   	news->next=NULL;
	}
	else
	{
		p->num++;
	}
}	
void InsertId(char *newone)
{
	struct ident *p,*q;
	struct ident *news;
	if(strcmp(newone,Identifier->str)==0)
	{
		Identifier->num++;
		return;
	}
    p=Identifier;
	q=Identifier;
    p=p->next;
    while(p!=NULL)
    {
		if( strcmp(newone,p->str)==0)
			break;
		p=p->next;
	    q=q->next;
	}
	if(p==NULL)
	{
		news=(struct ident *)malloc(LEN);
        news->str=(char *)malloc(sizeof(newone)+1);
		strcpy(news->str,newone);
		news->num=1;
		q->next=news;
		news->next=NULL;
	}
	else
	{
		p->num++;
	}
}	

void AddToKey(char *newone)
{
	if(Keyword==NULL)
	{
		Keyword=(struct ident *)malloc(LEN);
        Keyword->str=(char *)malloc(sizeof(newone)+1);
		strcpy(Keyword->str,newone);
		Keyword->num=1;
		Keyword->next=NULL;
	}
	else
	{
		InsertKey(newone);
	
	}

}

void AddToId(char *newone)
{
	if(Identifier==NULL)
	{
		Identifier=(struct ident *)malloc(LEN);
        Identifier->str=(char *)malloc(sizeof(newone)+1);
		strcpy(Identifier->str,newone);
		Identifier->num=1;
		Identifier->next=NULL;
	}
	else
	{
		InsertId(newone);
	
	}

}


void print()
{
        int i,j;
	struct ident *s,*p;
	p=Keyword;
        fprintf(fp,"关键字如下：\n");
	while(p!=NULL)
	{
		fprintf(fp,"%20s %3d time(s)\n",p->str,p->num);
        p=p->next;
	}
        fprintf(fp,"识别的变量如下：\n");
	s=Identifier;
	while(s!=NULL)
	{
		fprintf(fp,"%20s %3d time(s)\n",s->str,s->num);
        s=s->next;
	}

        fprintf(fp,"整数总数：       %d\n",IntNum);
        for(i=0;i<IntNum;i++)
             fprintf(fp,"%s\n",Integer[i]);
        fprintf(fp,"\n");
        fprintf(fp,"浮点数总数：     %d\n",FloatNum);
        for(j=0;j<FloatNum;j++)
             fprintf(fp,"%s\n",Float[j]);
        fprintf(fp,"\n");	
	fprintf(fp,"运算符号：(+-*/=())共有   %d time(s)\n",OperNum);
	fprintf(fp,"标点符号：(,;)共有        %d time(s)\n",SymNum);
	
		
}
#line 565 "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

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