*yy_cp = '\0'; \
yy_c_buf_p = yy_cp;
-#define EOB_ACT_RESTART_SCAN 0
-#define EOB_ACT_END_OF_FILE 1
-#define EOB_ACT_LAST_MATCH 2
+#define EOB_ACT_NUL_TRANS 0
+#define EOB_ACT_CONTINUE_SCAN 1
+#define EOB_ACT_END_OF_FILE 2
+#define EOB_ACT_LAST_MATCH 3
/* return all but the first 'n' matched characters back to the input stream */
#define yyless(n) \
#ifdef YY_USE_PROTOS
static yy_state_type yy_get_previous_state( void );
+static yy_state_type yy_try_NUL_trans( void );
static int yy_get_next_buffer( void );
static void yyunput( int c, YY_CHAR *buf_ptr );
static int input( void );
void yyrestart( FILE *input_file );
#else
static yy_state_type yy_get_previous_state();
+static yy_state_type yy_try_NUL_trans();
static int yy_get_next_buffer();
static void yyunput();
static int input();
%% code to set up and find next match goes here
- /* bogus while loop to let YY_BACK_TRACK, EOB_ACT_LAST_MATCH,
- * and EOF actions branch here without introducing an optimizer-
- * daunting goto
- */
- while ( 1 )
- {
+yy_find_action:
%% code to find the action number goes here
- YY_DO_BEFORE_ACTION;
- YY_USER_ACTION;
+ YY_DO_BEFORE_ACTION;
+ YY_USER_ACTION;
#ifdef FLEX_DEBUG
- fprintf( stderr, "--accepting rule #%d (\"%s\")\n",
- yy_act, yytext );
+ fprintf( stderr, "--accepting rule #%d (\"%s\")\n",
+ yy_act, yytext );
#endif
do_action: /* this label is used only to access EOF actions */
- switch ( yy_act )
- {
+ switch ( yy_act )
+ {
%% actions go here
- case YY_END_OF_BUFFER:
- /* undo the effects of YY_DO_BEFORE_ACTION */
- *yy_cp = yy_hold_char;
+ case YY_END_OF_BUFFER:
+ {
+ /* amount of text matched not including the EOB char */
+ int yy_amount_of_matched_text = yy_cp - yytext - 1;
+
+ /* undo the effects of YY_DO_BEFORE_ACTION */
+ *yy_cp = yy_hold_char;
- switch ( yy_get_next_buffer() )
+ switch ( yy_get_next_buffer() )
+ {
+ case EOB_ACT_END_OF_FILE:
{
- case EOB_ACT_END_OF_FILE:
+ if ( yywrap() )
{
- 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;
-
- yy_act = YY_STATE_EOF((yy_start - 1) / 2);
- goto do_action;
- }
-
- else
- YY_NEW_FILE;
+ /* 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 + YY_MORE_ADJ;
+
+ yy_act = YY_STATE_EOF((yy_start - 1) / 2);
+ goto do_action;
}
- break;
- case EOB_ACT_RESTART_SCAN:
- yy_c_buf_p = yytext + YY_MORE_ADJ;
- yy_hold_char = *yy_c_buf_p;
- break;
+ else
+ YY_NEW_FILE;
+ }
+ break;
+
+ case EOB_ACT_NUL_TRANS:
+ {
+ yy_state_type yy_next_state;
+
+ yy_c_buf_p = yytext + yy_amount_of_matched_text;
+
+ yy_current_state = yy_get_previous_state();
- case EOB_ACT_LAST_MATCH:
- yy_c_buf_p = &yy_ch_buf[yy_n_chars];
+ /* 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_current_state = yy_get_previous_state();
+ yy_next_state = yy_try_NUL_trans( yy_current_state );
+
+ yy_bp = yytext + 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;
+ }
- yy_cp = yy_c_buf_p;
- yy_bp = yytext + YY_MORE_ADJ;
- continue; /* go to "YY_DO_BEFORE_ACTION" */
+ else
+ {
+%% code to do backtracking for compressed tables and set up yy_cp goes here
+ goto yy_find_action;
+ }
}
- break;
- default:
-#ifdef FLEX_DEBUG
- printf( "action # %d\n", yy_act );
-#endif
- YY_FATAL_ERROR( "fatal flex scanner internal error" );
+ case EOB_ACT_CONTINUE_SCAN:
+ yy_c_buf_p = yytext + yy_amount_of_matched_text;
+
+ yy_current_state = yy_get_previous_state();
+
+ yy_cp = yy_c_buf_p;
+ yy_bp = yytext + YY_MORE_ADJ;
+ goto yy_match;
+
+ case EOB_ACT_LAST_MATCH:
+ yy_c_buf_p = &yy_ch_buf[yy_n_chars];
+
+ yy_current_state = yy_get_previous_state();
+
+ yy_cp = yy_c_buf_p;
+ yy_bp = yytext + YY_MORE_ADJ;
+ goto yy_find_action;
+ }
+ break;
}
- break; /* exit bogus while loop */
+ default:
+#ifdef FLEX_DEBUG
+ printf( "action # %d\n", yy_act );
+#endif
+ YY_FATAL_ERROR( "fatal flex scanner internal error" );
}
}
}
-/* yy_get_next_buffer - try to read in new buffer
+/* yy_get_next_buffer - try to read in a new buffer
*
* synopsis
* int yy_get_next_buffer();
*
* returns a code representing an action
* EOB_ACT_LAST_MATCH -
- * EOB_ACT_RESTART_SCAN - restart the scanner
+ * EOB_ACT_CONTINUE_SCAN - continue scanning from current position
* EOB_ACT_END_OF_FILE - end of file
*/
register YY_CHAR *source = yytext - 1; /* copy prev. char, too */
register int number_to_move, i;
int ret_val;
-
- if ( yy_c_buf_p != &yy_ch_buf[yy_n_chars + 1] )
- {
- YY_FATAL_ERROR( "NULL in input" );
- /*NOTREACHED*/
- }
+
+ if ( yy_c_buf_p < &yy_ch_buf[yy_n_chars + 1] )
+ /* this happens when we see a NUL */
+ return ( EOB_ACT_NUL_TRANS );
/* try to read more data */
}
else
- ret_val = EOB_ACT_RESTART_SCAN;
+ ret_val = EOB_ACT_CONTINUE_SCAN;
yy_n_chars += number_to_move;
yy_ch_buf[yy_n_chars] = YY_END_OF_BUFFER_CHAR;
}
+/* yy_try_NUL_trans - try to make a transition on the NUL character
+ *
+ * synopsis
+ * next_state = yy_try_NUL_trans( current_state );
+ */
+
+static yy_state_type yy_try_NUL_trans( yy_current_state )
+register yy_state_type yy_current_state;
+
+ {
+ register int yy_is_jam;
+%% code to find the next state, and perhaps do backtracking, goes here
+
+ return ( yy_is_jam ? 0 : yy_current_state );
+ }
+
+
#ifdef YY_USE_PROTOS
static void yyunput( int c, register YY_CHAR *yy_bp )
#else
{
if ( yywrap() )
{
- yy_c_buf_p = yytext;
+ yy_c_buf_p = yytext + YY_MORE_ADJ;
return ( EOF );
}
}
break;
- case EOB_ACT_RESTART_SCAN:
+ case EOB_ACT_NUL_TRANS:
+ *yy_c_buf_p = '\0';
+ break;
+
+ case EOB_ACT_CONTINUE_SCAN:
yy_c_buf_p = yytext + YY_MORE_ADJ;
break;
projects / flex / commitdiff