flex.c

YBasic编程语言的移植和开发 YBasic编程语言的移植和开发 YBasic编程语言的移植和开发

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



	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_more_len = 0;
		if ( yy_more_flag )
			{
			yy_more_len = yy_c_buf_p - yytext_ptr;
			yy_more_flag = 0;
			}
		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_state_ptr = yy_state_buf;
		*yy_state_ptr++ = yy_current_state;
yy_match:
		do
			{
			register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*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 >= 653 )
					yy_c = yy_meta[(unsigned int) yy_c];
				}
			yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
			*yy_state_ptr++ = yy_current_state;
			++yy_cp;
			}
		while ( yy_base[yy_current_state] != 1907 );

yy_find_action:
		yy_current_state = *--yy_state_ptr;
		yy_lp = yy_accept[yy_current_state];
find_rule: /* we branch to this label when backing up */
		for ( ; ; ) /* until we find what rule we matched */
			{
			if ( yy_lp && yy_lp < yy_accept[yy_current_state + 1] )
				{
				yy_act = yy_acclist[yy_lp];
				if ( yy_act & YY_TRAILING_HEAD_MASK ||
				     yy_looking_for_trail_begin )
					{
					if ( yy_act == yy_looking_for_trail_begin )
						{
						yy_looking_for_trail_begin = 0;
						yy_act &= ~YY_TRAILING_HEAD_MASK;
						break;
						}
					}
				else if ( yy_act & YY_TRAILING_MASK )
					{
					yy_looking_for_trail_begin = yy_act & ~YY_TRAILING_MASK;
					yy_looking_for_trail_begin |= YY_TRAILING_HEAD_MASK;
					}
				else
					{
					yy_full_match = yy_cp;
					yy_full_state = yy_state_ptr;
					yy_full_lp = yy_lp;
					break;
					}
				++yy_lp;
				goto find_rule;
				}
			--yy_cp;
			yy_current_state = *--yy_state_ptr;
			yy_lp = 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 YY_STATE_EOF(INITIAL):
case YY_STATE_EOF(PRELNO):
case YY_STATE_EOF(PASTLNO):
case YY_STATE_EOF(IMPORT):
case YY_STATE_EOF(IMPORT_DONE):
{
  if (--include_stack_ptr<0) {
    return tEOPROG;
  } else {
    if (!is_bound) {
      yy_delete_buffer(YY_CURRENT_BUFFER);
      yy_switch_to_buffer(include_stack[include_stack_ptr]);
    }
    flex_line+=yylval.sep=-1;
    return tSEP;
  }
}
	YY_BREAK
case 1:
YY_RULE_SETUP
{BEGIN(INITIAL);}     /* ignore whitespace */
	YY_BREAK
case 2:
YY_RULE_SETUP
{BEGIN(PRELNO);return tLABEL;}
	YY_BREAK
case 3:
YY_RULE_SETUP
{
  BEGIN(PASTLNO);
  yylval.symbol=(char *)my_strdup(yytext);
  return tSYMBOL;
}
	YY_BREAK
case 4:
YY_RULE_SETUP
{BEGIN(INITIAL);flex_line+=yylval.sep=0;yyless(0);return tSEP;}
	YY_BREAK
case 5:
YY_RULE_SETUP
{if (fi_pending) {fi_pending--;yyless(0);return tENDIF;}BEGIN(INITIAL);flex_line+=yylval.sep=1;return tSEP;}
	YY_BREAK
case 6:
YY_RULE_SETUP
{if (fi_pending) {fi_pending--;yyless(0);return tENDIF;}if (interactive && !inlib) {return tEOPROG;} else {flex_line+=yylval.sep=2;return tSEP;}}
	YY_BREAK
case 7:
YY_RULE_SETUP
{if (fi_pending) {fi_pending--;yyless(0);return tENDIF;}flex_line+=yylval.sep=1;return tSEP;}
	YY_BREAK
case 8:
YY_RULE_SETUP
{if (fi_pending && check_compat) error_with_line(WARNING,"short-if has changed in version 2.71",flex_line);flex_line+=yylval.sep=0;return tSEP;}
	YY_BREAK
case 9:
YY_RULE_SETUP
{flex_line+=yylval.sep=0;return tSEP;}  /* comments span 'til end of line */
	YY_BREAK
case 10:
YY_RULE_SETUP
{flex_line+=yylval.sep=0;return tSEP;}  /* comments span 'til end of line */
	YY_BREAK
case 11:
YY_RULE_SETUP
{if (fi_pending) {fi_pending--;yyless(0);return tENDIF;}flex_line+=yylval.sep=1;return tSEP;}
	YY_BREAK
case 12:
YY_RULE_SETUP
{yymore();}
	YY_BREAK
case 13:
YY_RULE_SETUP
{BEGIN(IMPORT);}
	YY_BREAK
case 14:
YY_RULE_SETUP
{if (!import_lib(yytext)) return 0;BEGIN(IMPORT_DONE);return tIMPORT;}
	YY_BREAK
case 15:
YY_RULE_SETUP
{if (yytext[0]=='\n' && fi_pending) {fi_pending--;yyless(0);return tENDIF;}BEGIN(INITIAL);yyless(0);flex_line+=yylval.sep=0;return tSEP;}
	YY_BREAK
case 16:
YY_RULE_SETUP
{
  char *where=strpbrk(yytext," \t\r\f\v");
  yylval.docu=(char *)my_strdup(where ? where+1 : NULL);
  return tDOCU;
}
	YY_BREAK
case 17:
YY_RULE_SETUP
{flex_line+=yylval.sep=1;return tSEP;} /* '#' as first character may introduce comments too */
	YY_BREAK
case 18:
YY_RULE_SETUP
{flex_line+=yylval.sep=1;return tSEP;} /* ' as first character may introduce comments too */
	YY_BREAK
case 19:
YY_RULE_SETUP
return tEXECUTE;
	YY_BREAK
case 20:
YY_RULE_SETUP
return tEXECUTE2;
	YY_BREAK
case 21:
YY_RULE_SETUP
return tCOMPILE;
	YY_BREAK
case 22:
YY_RULE_SETUP
return tRUNTIME_CREATED_SUB;
	YY_BRE