yylex.c

編譯器的accent語法分析器

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 8 "gen.l"
{ yysetpos(); return yytk_PERCENT_o_BLANK_u_BLANK_t_BLANK; }
	YY_BREAK
case 2:
YY_RULE_SETUP
#line 9 "gen.l"
{ yysetpos(); return yytk_PERCENT_i_BLANK_n_BLANK; }
	YY_BREAK
case 3:
YY_RULE_SETUP
#line 10 "gen.l"
{ yysetpos(); return yytk_GREATER; }
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 11 "gen.l"
{ yysetpos(); return yytk_LESS; }
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 12 "gen.l"
{ yysetpos(); return yytk_PERCENT_l_BLANK_o_BLANK_n_BLANK_g_BLANK; }
	YY_BREAK
case 6:
YY_RULE_SETUP
#line 13 "gen.l"
{ yysetpos(); return yytk_PERCENT_s_BLANK_h_BLANK_o_BLANK_r_BLANK_t_BLANK; }
	YY_BREAK
case 7:
YY_RULE_SETUP
#line 14 "gen.l"
{ yysetpos(); return yytk_RPAREN; }
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 15 "gen.l"
{ yysetpos(); return yytk_RPAREN_ASTERISK; }
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 16 "gen.l"
{ yysetpos(); return yytk_RPAREN_QUESTIONM; }
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 17 "gen.l"
{ yysetpos(); return yytk_LPAREN; }
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 18 "gen.l"
{ yysetpos(); return yytk_PERCENT_p_BLANK_r_BLANK_i_BLANK_o_BLANK; }
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 19 "gen.l"
{ yysetpos(); return yytk_BAR; }
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 20 "gen.l"
{ yysetpos(); return yytk_COLON; }
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 21 "gen.l"
{ yysetpos(); return yytk_COMMA; }
	YY_BREAK
case 15:
YY_RULE_SETUP
#line 22 "gen.l"
{ yysetpos(); return yytk_SEMICOLON; }
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 23 "gen.l"
{ yysetpos(); return yytk_PERCENT_t_BLANK_o_BLANK_k_BLANK_e_BLANK_n_BLANK; }
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 24 "gen.l"
{ yysetpos(); return yytk_PERCENT_p_BLANK_r_BLANK_e_BLANK_l_BLANK_u_BLANK_d_BLANK_e_BLANK; }
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 25 "gen.l"
{ 
   long id;
   string_to_id (yytext, &id);
   yylval.attr[1] = id;
   yysetpos();
   return Ident;
}
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 32 "gen.l"
{
   char ch;
   switch (yytext[2]) {
   case 'n' :
      ch = '\n';
      break;
   case 't' :
      ch = '\t';
      break;
   case 'v' :
      ch = '\v';
      break;
   case 'b' :
      ch = '\b';
      break;
   case 'r' :
      ch = '\r';
      break;
   case 'f' :
      ch = '\f';
      break;
   case 'a' :
      ch = '\a';
      break;
   case '\\' :
      ch = '\\';
      break;
   case '?' :
      ch = '\?';
      break;
   case '\'' :
      ch = '\'';
      break;
   case '"' :
      ch = '\"';
      break;
   default :
      ch = yytext[2];
   }
   yylval.attr[1] = ch;
   yysetpos();
   return Char;
}
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 75 "gen.l"
{
   yylval.attr[1] = yytext[1];
   yysetpos();
   return Char;
}
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 80 "gen.l"
{
   yylval.attr[1] = atoi(yytext);
   yysetpos();
   return Number;
}
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 85 "gen.l"
{   /* Code Blocks */

   /* GetStringRef, AppendToString: */
   /* implemented in lib/strings.c  */

   int blocklevel = 1;

   yysetpos();

   for(;;) {
      int ch = input(); yypos++;
      if (ch <= 0) {
	 yyerror("EOF inside action block");
	 break;
      }

      if (ch == '"' || ch == '\'') { /* strings, chars */
	 char this_terminator = ch;

	 AppendToString(this_terminator);
	 for(;;) {
	    ch = input(); yypos++;
	    if (ch <= 0) {
	       yyerror("EOF inside string");
	       break;
	    }
	    if (ch == '\\') { /* escape inside string */
               ch = input(); yypos++;
	       if (ch <= 0) {
		  yyerror("EOF inside string");
		  break;
	       }
	       AppendToString('\\');
	       AppendToString(ch);
	    }
	    else if (ch == this_terminator) {
	       break;
	    }
	    else
	       AppendToString(ch);
	 }
	 AppendToString(this_terminator);
      }

      else if (ch == '\\') { /* handle escaped characters */
	 ch = input(); yypos++;
	 if (ch <= 0) {
	    yyerror("EOF inside action block");
	    break;
	 }
	 AppendToString('\\');
	 AppendToString(ch);
      }

      else if (ch == '{') { /* nested action block */
	 blocklevel++;
	 AppendToString(ch);
      }
      else if (ch == '}') { /* end of (nested ?) action block */
	 blocklevel--;
	 if (blocklevel == 0) {
	    char *str;
	    GetStringRef(&str);
	    yylval.attr[1] = (long) str;
	    return CodeBlock;
	 }
	 else {
	    AppendToString(ch);
	 }
      }
      else if (ch == '/') { /* comment ? */
	 AppendToString('/');
	 ch = input(); yypos++;
	 if (ch == '*') { /* "/*"comment */
	    AppendToString('*');
	    ch = input(); yypos++;
	    for(;;) {
	       AppendToString(ch);
	       ch = input(); yypos++;
	       if (ch == '*') {
		  do {
	             AppendToString(ch);
		     ch = input(); yypos++;
		  } while (ch == '*');
		  if (ch == '/') {
	             AppendToString(ch);
		     break;
		  }
	       }
	       if (ch == '\n') {
		  AppendToString(ch);
		  yyPosToNextLine();
	       }
	       else if (ch <= 0) {
		  yyerror("EOF inside comment");
		  break;
	       }
	    }
	 }
	 else if (ch == '/') { /* "//" comment */
	    AppendToString('/');
	    ch = input(); yypos++;
	    for(;;) {
	       AppendToString(ch);
	       ch = input(); yypos++;
	       if (ch == '\n') {
		  AppendToString(ch);
		  yyPosToNextLine();
		  break;
	       }
	       else if (ch <= 0) {
		  yyerror("EOF inside comment");
		  break;
	       }
	    }
	 }
	 else {
            AppendToString(ch);
	 }
      }
      else {
         AppendToString(ch);
      }
      if (ch == '\n') {
	 yyPosToNextLine();
      }
   }
}
	YY_BREAK
case 23:
YY_RULE_SETUP
#line 213 "gen.l"
{   /* old C style comment */
   yypos += 2;
   for(;;) {
      int ch = input(); yypos++;
      if (ch == '*') {
	 do {
	    ch = input(); yypos++;
	 } while (ch == '*');
	 if (ch == '/') break;
      }
      if (ch == '\n') {
	 yyPosToNextLine();
      }
      else if (ch <= 0) {
	 yyerror("EOF inside comment");
	 break;
      }
   }
}
	YY_BREAK
case 24:
YY_RULE_SETUP
#line 232 "gen.l"
{   /* C++ style comment */
   yypos += 2;
   for(;;) {
      int ch = input(); yypos++;
      if (ch == '\n') {
	 yyPosToNextLine();
	 break;
      }
      else if (ch <= 0) {
	 yyerror("EOF inside comment");
	 break;
      }
   }
}
	YY_BREAK
case 25:
YY_RULE_SETUP
#line 246 "gen.l"
{ yypos += 1; }
	YY_BREAK
case 26:
YY_RULE_SETUP
#line 247 "gen.l"
{ yyPosToNextLine(); }
	YY_BREAK
case 27:
YY_RULE_SETUP
#line 248 "gen.l"
{ yypos += 1; }
	YY_BREAK
case 28:
YY_RULE_SETUP
#line 249 "gen.l"
{ yysetpos(); yyerror("illegal token"); }
	YY_BREAK
case 29:
YY_RULE_SETUP
#line 250 "gen.l"
ECHO;
	YY_BREAK
#line 1008 "lex.yy.c"
case YY_STATE_EOF(INITIAL):
	yyterminate();

	case YY_END_OF_BUFFER:
		{
		/* Amount of text matched not including the EOB char. */
		int yy_amount_of_matched_text = (int) (yy_cp - yytext_ptr) - 1;

		/* Undo the effects of YY_DO_BEFORE_ACTION. */
		*yy_cp = yy_hold_char;
		YY_RESTORE_YY_MORE_OFFSET

		if ( yy_current_buffer->yy_buffer_status == YY_BUFFER_NEW )
			{
			/* We're scanning a new file or input source.  It's
			 * possible that this happened because the user
			 * just pointed yyin at a new source and called
			 * yylex().  If so, then we have to assure
			 * consistency between yy_current_buffer and our
			 * globals.  Here is the right place to do so, because
			 * this is the first action (other than possibly a
			 * back-up) that will match for the new input source.
			 */
			yy_n_chars = yy_current_buffer->yy_n_chars;
			yy_current_buffer->yy_input_file = yyin;
			yy_current_buffer->yy_buffer_status = YY_BUFFER_NORMAL;
			}

		/* Note that here we test for yy_c_buf_p "<=" to the position
		 * of the first EOB in the buffer, since yy_c_buf_p will
		 * already have been incremented past the NUL character
		 * (since all states make transitions on EOB to the
		 * end-of-buffer state).  Contrast this with the test
		 * in input().
		 */
		if ( yy_c_buf_p <= &yy_current_buffer->yy_ch_buf[yy_n_chars] )
			{ /* This was really a NUL. */
			yy_state_type yy_next_state;

			yy_c_buf_p = yytext_ptr + yy_amount_of_matched_text;

			yy_current_state = yy_get_previous_state();

			/* Okay, we're now positioned to make the NUL
			 * transition.  We couldn't have
			 * yy_get_previous_state() go ahead and do it
			 * for us because it doesn't know how to deal
			 * with the possibility of jamming (and we don't
			 * want to build jamming into it because then it
			 * will run more slowly).
			 */

			yy_next_state = yy_try_NUL_trans( yy_current_state );

			yy_bp = yytext_ptr + YY_MORE_ADJ;

			if ( yy_next_state )
				{
				/* Consume the NUL. */
				yy_cp = ++yy_c_buf_p;
				yy_current_state = yy_next_state;
				goto yy_match;
				}

			else
				{
				yy_cp = yy_c_buf_p;
				goto yy_find_action;
				}
			}

		else switch ( yy_get_next_buffer() )
			{
			case EOB_ACT_END_OF_FILE:
				{
				yy_did_buffer_switch_on_eof = 0;

				if ( yywrap() )
					{
					/* Note: because we've taken care in
					 * yy_get_next_buffer() to have set up
					 * yytext, we can now set up
					 * yy_c_buf_p so that if some total
					 * hoser (like flex itself) wants to
					 * call the scanner after we return the
					 * YY_NULL, it'll still work - another
					 * YY_NULL will get returned.
					 */
					yy_c_buf_p = yytext_ptr + YY_MORE_ADJ;

					yy_act = YY_STATE_EOF(YY_START);
					goto do_action;
					}

				else
					{
					if ( ! yy_did_buffer_switch_on_eof )
						YY_NEW_FILE;
					}
				break;
				}

			case EOB_ACT_CONTINUE_SCAN:
				yy_c_buf_p =
					yytext_ptr + yy_amount_of_matched_text;

				yy_current_state = yy_get_previous_state();

				yy_cp = yy_c_buf_p;
				yy_bp = yytext_ptr + YY_MORE_ADJ;
				goto yy_match;

			case EOB_ACT_LAST_MATCH:
				yy_c_buf_p =
				&yy_current_buffer->yy_ch_buf[yy_n_chars];

				yy_current_state = yy_get_previous_state();

				yy_cp = yy_c_buf_p;
				yy_bp = yytext_ptr + YY_MORE_ADJ;
				goto yy_find_action;
			}
		break;
		}

	default:
		YY_FATAL_ERROR(
			"fatal flex scanner internal error--no action found" );
	} /* end of action switch */
		} /* end of scanning one token */
	} /* end of yylex */


/* yy_get_next_buffer - try to read in a new buffer
 *
 * Returns a code representing an action:
 *	EOB_ACT_LAST_MATCH -
 *	EOB_ACT_CONTINUE_SCAN - continue scanning from current position
 *	EOB_ACT_END_OF_FILE - end of file
 */

static int yy_get_next_buffer()
	{
	register char *dest = yy_current_buffer->yy_ch_buf;
	register char *source = yytext_ptr;
	register int number_to_move, i;
	int ret_val;

	if ( yy_c_buf_p > &yy_current_buffer->yy_ch_buf[yy_n_chars + 1] )
		YY_FATAL_ERROR(
		"fatal flex scanner internal error--end of buffer missed" );

	if ( yy_current_buffer->yy_fill_buffer == 0 )
		{ /* Don't try to fill the buffer, so this is an EOF. */
		if ( yy_c_buf_p - yytext_ptr - YY_MORE_ADJ == 1 )
			{
			/* We matched a single character, the EOB, so
			 * treat this as a final EOF.
			 */
			return EOB_ACT_END_OF_FILE;
			}

		else
			{
			/* We matched some text prior to the EOB, first
			 * process it.
			 */
			return EOB_ACT_LAST_MATCH;
			}
		}

	/* Try to read more data. */

	/* First move last chars to start of buffer. */
	number_to_move = (int) (yy_c_buf_p - yytext_ptr) - 1;

	for ( i = 0; i < number_to_move; ++i )
		*(dest++) = *(source++);

	if ( yy_current_buffer->yy_buffer_status == YY_BUFFER_EOF_PENDING )
		/* don't do the read, it's not guaranteed to return an EOF,
		 * just force an EOF
		 */
		yy_current_buffer->yy_n_chars = yy_n_chars = 0;

	else
		{
		int num_to_read =
			yy_current_buffer->yy_buf_size - number_to_move - 1;

		while ( num_to_read <= 0 )
			{ /* Not enough room in the buffer - grow it. */
#ifdef YY_USES_REJECT
			YY_FATAL_ERROR(
"input buffer overflow, can't enlarge buffer because scanner uses REJECT" );
#else

			/* just a shorter name for the current buffer */
			YY_BUFFER_STATE b = yy_current_buffer;

			int yy_c_buf_p_offset =
				(int) (yy_c_buf_p - b->yy_ch_buf);

			if ( b->yy_is_our_buffer )
				{
				int new_size = b->yy_buf_size * 2;

				if ( new_size <= 0 )
					b->yy_buf_size += b->yy_buf_size / 8;
				else
					b->yy_buf_size *= 2;

				b->yy_ch_buf = (char *)
					/* Include room in for 2 EOB chars. */
					yy_flex_realloc( (void *) b->yy_ch_buf,
							 b->yy_buf_size + 2 );
				}
			else
				/* Can't grow it, we don't own it. */
				b->yy_ch_buf = 0;

			if ( ! b->yy_ch_buf )
				YY_FATAL_ERROR(
				"fatal error - scanner input buffer overflow" );

			yy_c_buf_p = &b->yy_ch_buf[yy_c_buf_p_offset];

			num_to_read = yy_current_buffer->yy_buf_size -
						number_to_move - 1;
#endif
			}

		if ( num_to_read > YY_READ_BUF_SIZE )
			num_to_read = YY_READ_BUF_SIZE;

		/* Read in more data. */
		YY_INPUT( (&yy_current_buffer->yy_ch_buf[number_to_move]),
			yy_n_chars, num_to_read );

		yy_current_buffer->yy_n_chars = yy_n_chars;
		}

	if ( yy_n_chars == 0 )
		{
		if ( number_to_move == YY_MORE_ADJ )
			{
			ret_val = EOB_ACT_END_OF_FILE;
			yyrestart( yyin );
			}

		else
			{
			ret_val = EOB_ACT_LAST_MATCH;
			yy_current_buffer->yy_buffer_status =
				YY_BUFFER_EOF_PENDING;
			}
		}

	else