lex.yy.c

一个小计算器的实现(编译原理),用Lex和bison

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 = NULL, *yy_bp = NULL;
	register int yy_act;

#line 24 "nepc.l"

                char *s, *v;
                char tmpstr[MAX_STRLEN];
#line 634 "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 >= 162 )
					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] != 205 );

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 27 "nepc.l"
{ BEGIN ASTRING; s = tmpstr; }
	YY_BREAK
case 2:
YY_RULE_SETUP
#line 29 "nepc.l"
{ *s++ = '\t'; /* CARE BUFFER OVERFLOW HERE!!! */ }
	YY_BREAK
case 3:
YY_RULE_SETUP
#line 30 "nepc.l"
{ *s++ = '\"'; /* CARE BUFFER OVERFLOW HERE!!! */ }
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 31 "nepc.l"
{
                    *s = '\0';
                    BEGIN 0; 
                    yylval.pStr = tmpstr;
                    return STRING;
                }
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 38 "nepc.l"
{ *s++ = *yytext; }
	YY_BREAK
case 6:
YY_RULE_SETUP
#line 40 "nepc.l"
return TYPE_INT;
	YY_BREAK
case 7:
YY_RULE_SETUP
#line 41 "nepc.l"
return TYPE_FLOAT;
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 42 "nepc.l"
return TYPE_DOUBLE;
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 43 "nepc.l"
return TYPE_LONG;
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 44 "nepc.l"
return TYPE_STRING;
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 45 "nepc.l"
return TYPE_STRUCT;
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 49 "nepc.l"
return WHILE;
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 50 "nepc.l"
return FOR;
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 51 "nepc.l"
return IF;
	YY_BREAK
case 15:
YY_RULE_SETUP
#line 52 "nepc.l"
return ELSE;
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 53 "nepc.l"
return PRINT;
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 55 "nepc.l"
return EXIT;
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 56 "nepc.l"
return EXIT;
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 57 "nepc.l"
return ERASE;
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 58 "nepc.l"
return CLEAR;
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 59 "nepc.l"
return CLEAR;
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 60 "nepc.l"
return LIST;
	YY_BREAK
case 23:
YY_RULE_SETUP
#line 61 "nepc.l"
return LIST;
	YY_BREAK
case 24:
YY_RULE_SETUP
#line 62 "nepc.l"
return HELP;
	YY_BREAK
case 25:
YY_RULE_SETUP
#line 63 "nepc.l"
return DEC;
	YY_BREAK
case 26:
YY_RULE_SETUP
#line 64 "nepc.l"
return HEX;
	YY_BREAK
case 27:
YY_RULE_SETUP
#line 65 "nepc.l"
return OCT;
	YY_BREAK
case 28:
YY_RULE_SETUP
#line 67 "nepc.l"
return ACOS;
	YY_BREAK
case 29:
YY_RULE_SETUP
#line 68 "nepc.l"
return ASIN;
	YY_BREAK
case 30:
YY_RULE_SETUP
#line 69 "nepc.l"
return ATAN;
	YY_BREAK
case 31:
YY_RULE_SETUP
#line 70 "nepc.l"
return CEIL;
	YY_BREAK
case 32:
YY_RULE_SETUP
#line 71 "nepc.l"
return COS;
	YY_BREAK
case 33:
YY_RULE_SETUP
#line 72 "nepc.l"
return COSH;
	YY_BREAK
case 34:
YY_RULE_SETUP
#line 73 "nepc.l"
return EXP;
	YY_BREAK
case 35:
YY_RULE_SETUP
#line 74 "nepc.l"
return FABS;
	YY_BREAK
case 36:
YY_RULE_SETUP
#line 75 "nepc.l"
return FLOOR;
	YY_BREAK
case 37:
YY_RULE_SETUP
#line 76 "nepc.l"
return LOG;
	YY_BREAK
case 38:
YY_RULE_SETUP
#line 77 "nepc.l"
return LOG10;
	YY_BREAK
case 39:
YY_RULE_SETUP
#line 78 "nepc.l"
return SIN;
	YY_BREAK
case 40:
YY_RULE_SETUP
#line 79 "nepc.l"
return SINH;
	YY_BREAK
case 41:
YY_RULE_SETUP
#line 80 "nepc.l"
return SQRT;
	YY_BREAK
case 42:
YY_RULE_SETUP
#line 81 "nepc.l"
return TAN;
	YY_BREAK
case 43:
YY_RULE_SETUP
#line 82 "nepc.l"
return TANH;
	YY_BREAK
case 44:
YY_RULE_SETUP
#line 83 "nepc.l"
{ comment(); }
	YY_BREAK
case 45:
YY_RULE_SETUP
#line 85 "nepc.l"
{ comment2(); }
	YY_BREAK
case 46:
YY_RULE_SETUP
#line 86 "nepc.l"
{
                v=malloc(yyleng+1);
                strncpy(v, yytext, yyleng);
                v[yyleng]='\0';
                yylval.pStr = v;
                return VARIABLE;
            }
	YY_BREAK
case 47:
YY_RULE_SETUP
#line 94 "nepc.l"
{
                yylval.iValue = STR_TO_INT(yytext);
                return INTEGER;
            }
	YY_BREAK
case 48:
YY_RULE_SETUP
#line 99 "nepc.l"
{
                yylval.fValue = STR_TO_FLT(yytext);
                return FLOAT;
            }
	YY_BREAK
case 49:
YY_RULE_SETUP
#line 104 "nepc.l"
{
                int i=1; 
                INT val=0;
                while(i<yyleng)
                {
                    val=(val<<3)+yytext[i]-'0';
                    i++;
                }
                yylval.iValue=val;
                return INTEGER;
            }
	YY_BREAK
case 50:
YY_RULE_SETUP
#line 120 "nepc.l"
{
                int i=2;
                INT val=0;
                while(i<yyleng)
                {
                    if(islower(yytext[i])) val=(val<<4)+yytext[i]-'a'+10;
                    else if(isupper(yytext[i])) val=(val<<4)+yytext[i]-'A'+10;
                    else val=(val<<4)+yytext[i]-'0';
                    i++;
                }
                yylval.iValue=val;
                return INTEGER;
            }
	YY_BREAK
case 51:
YY_RULE_SETUP
#line 133 "nepc.l"
{
                    return *yytext;
                }
	YY_BREAK
case 52:
YY_RULE_SETUP
#line 136 "nepc.l"