1 /* gen - actual generation (writing) of flex scanners */
4 * Copyright (c) 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
10 * The United States Government has rights in this work pursuant
11 * to contract no. DE-AC03-76SF00098 between the United States
12 * Department of Energy and the University of California.
14 * Redistribution and use in source and binary forms are permitted provided
15 * that: (1) source distributions retain this entire copyright notice and
16 * comment, and (2) distributions including binaries display the following
17 * acknowledgement: ``This product includes software developed by the
18 * University of California, Berkeley and its contributors'' in the
19 * documentation or other materials provided with the distribution and in
20 * all advertising materials mentioning features or use of this software.
21 * Neither the name of the University nor the names of its contributors may
22 * be used to endorse or promote products derived from this software without
23 * specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
25 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
29 /* $Header: /home/daffy/u0/vern/flex/RCS/gen.c,v 2.56 96/05/25 20:43:38 vern Exp $ */
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
36 /* declare functions that have forward references */
38 void gen_next_state PROTO((int));
39 void genecs PROTO((void));
40 void indent_put2s PROTO((char [], char []));
41 void indent_puts PROTO((char []));
44 static int indent_level = 0; /* each level is 8 spaces */
46 #define indent_up() (++indent_level)
47 #define indent_down() (--indent_level)
48 #define set_indent(indent_val) indent_level = indent_val
50 /* Almost everything is done in terms of arrays starting at 1, so provide
51 * a null entry for the zero element of all C arrays. (The exception
52 * to this is that the fast table representation generally uses the
53 * 0 elements of its arrays, too.)
55 static char C_int_decl[] = "static yyconst int %s[%d] =\n { 0,\n";
56 static char C_short_decl[] = "static yyconst short int %s[%d] =\n { 0,\n";
57 static char C_long_decl[] = "static yyconst long int %s[%d] =\n { 0,\n";
58 static char C_state_decl[] =
59 "static yyconst yy_state_type %s[%d] =\n { 0,\n";
62 /* Indent to the current level. */
66 int i = indent_level * 8;
82 /* Generate the code to keep backing-up information. */
86 if ( reject || num_backing_up == 0 )
90 indent_puts( "if ( yy_current_state[-1].yy_nxt )" );
92 indent_puts( "if ( yy_accept[yy_current_state] )" );
96 indent_puts( "yy_last_accepting_state = yy_current_state;" );
97 indent_puts( "yy_last_accepting_cpos = yy_cp;" );
103 /* Generate the code to perform the backing up. */
107 if ( reject || num_backing_up == 0 )
112 indent_puts( "case 0: /* must back up */" );
113 indent_puts( "/* undo the effects of YY_DO_BEFORE_ACTION */" );
114 indent_puts( "*yy_cp = yy_hold_char;" );
116 if ( fullspd || fulltbl )
117 indent_puts( "yy_cp = yy_last_accepting_cpos + 1;" );
119 /* Backing-up info for compressed tables is taken \after/
120 * yy_cp has been incremented for the next state.
122 indent_puts( "yy_cp = yy_last_accepting_cpos;" );
124 indent_puts( "yy_current_state = yy_last_accepting_state;" );
125 indent_puts( "goto yy_find_action;" );
132 /* genctbl - generates full speed compressed transition table */
137 int end_of_buffer_action = num_rules + 1;
139 /* Table of verify for transition and offset to next state. */
140 out_dec( "static yyconst struct yy_trans_info yy_transition[%d] =\n",
141 tblend + numecs + 1 );
144 /* We want the transition to be represented as the offset to the
145 * next state, not the actual state number, which is what it currently
146 * is. The offset is base[nxt[i]] - (base of current state)]. That's
147 * just the difference between the starting points of the two involved
148 * states (to - from).
150 * First, though, we need to find some way to put in our end-of-buffer
151 * flags and states. We do this by making a state with absolutely no
152 * transitions. We put it at the end of the table.
155 /* We need to have room in nxt/chk for two more slots: One for the
156 * action and one for the end-of-buffer transition. We now *assume*
157 * that we're guaranteed the only character we'll try to index this
158 * nxt/chk pair with is EOB, i.e., 0, so we don't have to make sure
159 * there's room for jam entries for other characters.
162 while ( tblend + 2 >= current_max_xpairs )
165 while ( lastdfa + 1 >= current_max_dfas )
168 base[lastdfa + 1] = tblend + 2;
169 nxt[tblend + 1] = end_of_buffer_action;
170 chk[tblend + 1] = numecs + 1;
171 chk[tblend + 2] = 1; /* anything but EOB */
173 /* So that "make test" won't show arb. differences. */
176 /* Make sure every state has an end-of-buffer transition and an
179 for ( i = 0; i <= lastdfa; ++i )
181 int anum = dfaacc[i].dfaacc_state;
182 int offset = base[i];
184 chk[offset] = EOB_POSITION;
185 chk[offset - 1] = ACTION_POSITION;
186 nxt[offset - 1] = anum; /* action number */
189 for ( i = 0; i <= tblend; ++i )
191 if ( chk[i] == EOB_POSITION )
192 transition_struct_out( 0, base[lastdfa + 1] - i );
194 else if ( chk[i] == ACTION_POSITION )
195 transition_struct_out( 0, nxt[i] );
197 else if ( chk[i] > numecs || chk[i] == 0 )
198 transition_struct_out( 0, 0 ); /* unused slot */
200 else /* verify, transition */
201 transition_struct_out( chk[i],
202 base[nxt[i]] - (i - chk[i]) );
206 /* Here's the final, end-of-buffer state. */
207 transition_struct_out( chk[tblend + 1], nxt[tblend + 1] );
208 transition_struct_out( chk[tblend + 2], nxt[tblend + 2] );
212 /* Table of pointers to start states. */
214 "static yyconst struct yy_trans_info *yy_start_state_list[%d] =\n",
216 outn( " {" ); /* } so vi doesn't get confused */
218 for ( i = 0; i <= lastsc * 2; ++i )
219 out_dec( " &yy_transition[%d],\n", base[i] );
228 /* Generate equivalence-class tables. */
235 out_str_dec( C_int_decl, "yy_ec", csize );
237 for ( i = 1; i < csize; ++i )
239 if ( caseins && (i >= 'A') && (i <= 'Z') )
240 ecgroup[i] = ecgroup[clower( i )];
242 ecgroup[i] = ABS( ecgroup[i] );
243 mkdata( ecgroup[i] );
250 fputs( _( "\n\nEquivalence Classes:\n\n" ), stderr );
254 for ( j = 0; j < numrows; ++j )
256 for ( i = j; i < csize; i = i + numrows )
258 fprintf( stderr, "%4s = %-2d",
259 readable_form( i ), ecgroup[i] );
264 putc( '\n', stderr );
270 /* Generate the code to find the action number. */
272 void gen_find_action()
275 indent_puts( "yy_act = yy_current_state[-1].yy_nxt;" );
278 indent_puts( "yy_act = yy_accept[yy_current_state];" );
282 indent_puts( "yy_current_state = *--yy_state_ptr;" );
283 indent_puts( "yy_lp = yy_accept[yy_current_state];" );
286 "goto find_rule; /* avoid `defined but not used' warning */");
288 "find_rule: /* we branch to this label when backing up */" );
291 "for ( ; ; ) /* until we find what rule we matched */" );
298 "if ( yy_lp && yy_lp < yy_accept[yy_current_state + 1] )" );
301 indent_puts( "yy_act = yy_acclist[yy_lp];" );
303 if ( variable_trailing_context_rules )
305 indent_puts( "if ( yy_act & YY_TRAILING_HEAD_MASK ||" );
306 indent_puts( " yy_looking_for_trail_begin )" );
311 "if ( yy_act == yy_looking_for_trail_begin )" );
314 indent_puts( "yy_looking_for_trail_begin = 0;" );
315 indent_puts( "yy_act &= ~YY_TRAILING_HEAD_MASK;" );
316 indent_puts( "break;" );
323 indent_puts( "else if ( yy_act & YY_TRAILING_MASK )" );
327 "yy_looking_for_trail_begin = yy_act & ~YY_TRAILING_MASK;" );
329 "yy_looking_for_trail_begin |= YY_TRAILING_HEAD_MASK;" );
333 /* Remember matched text in case we back up
336 indent_puts( "yy_full_match = yy_cp;" );
337 indent_puts( "yy_full_state = yy_state_ptr;" );
338 indent_puts( "yy_full_lp = yy_lp;" );
344 indent_puts( "else" );
347 indent_puts( "yy_full_match = yy_cp;" );
348 indent_puts( "yy_full_state = yy_state_ptr;" );
349 indent_puts( "yy_full_lp = yy_lp;" );
350 indent_puts( "break;" );
354 indent_puts( "++yy_lp;" );
355 indent_puts( "goto find_rule;" );
360 /* Remember matched text in case we back up due to
361 * trailing context plus REJECT.
365 indent_puts( "yy_full_match = yy_cp;" );
366 indent_puts( "break;" );
374 indent_puts( "--yy_cp;" );
376 /* We could consolidate the following two lines with those at
377 * the beginning, but at the cost of complaints that we're
378 * branching inside a loop.
380 indent_puts( "yy_current_state = *--yy_state_ptr;" );
381 indent_puts( "yy_lp = yy_accept[yy_current_state];" );
390 indent_puts( "yy_act = yy_accept[yy_current_state];" );
392 if ( interactive && ! reject )
394 /* Do the guaranteed-needed backing up to figure out
397 indent_puts( "if ( yy_act == 0 )" );
399 indent_puts( "{ /* have to back up */" );
400 indent_puts( "yy_cp = yy_last_accepting_cpos;" );
402 "yy_current_state = yy_last_accepting_state;" );
403 indent_puts( "yy_act = yy_accept[yy_current_state];" );
411 /* genftbl - generate full transition table */
416 int end_of_buffer_action = num_rules + 1;
418 out_str_dec( long_align ? C_long_decl : C_short_decl,
419 "yy_accept", lastdfa + 1 );
421 dfaacc[end_of_buffer_state].dfaacc_state = end_of_buffer_action;
423 for ( i = 1; i <= lastdfa; ++i )
425 int anum = dfaacc[i].dfaacc_state;
430 fprintf( stderr, _( "state # %d accepts: [%d]\n" ),
439 /* Don't have to dump the actual full table entries - they were
440 * created on-the-fly.
445 /* Generate the code to find the next compressed-table state. */
447 void gen_next_compressed_state( char_map )
450 indent_put2s( "YY_CHAR yy_c = %s;", char_map );
452 /* Save the backing-up info \before/ computing the next state
453 * because we always compute one more state than needed - we
454 * always proceed until we reach a jam state
459 "while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )" );
462 indent_puts( "yy_current_state = (int) yy_def[yy_current_state];" );
466 /* We've arrange it so that templates are never chained
467 * to one another. This means we can afford to make a
468 * very simple test to see if we need to convert to
469 * yy_c's meta-equivalence class without worrying
470 * about erroneously looking up the meta-equivalence
475 /* lastdfa + 2 is the beginning of the templates */
476 out_dec( "if ( yy_current_state >= %d )\n", lastdfa + 2 );
479 indent_puts( "yy_c = yy_meta[(unsigned int) yy_c];" );
487 "yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];" );
491 /* Generate the code to find the next match. */
493 void gen_next_match()
495 /* NOTE - changes in here should be reflected in gen_next_state() and
498 char *char_map = useecs ?
499 "yy_ec[YY_SC_TO_UI(*yy_cp)]" :
500 "YY_SC_TO_UI(*yy_cp)";
502 char *char_map_2 = useecs ?
503 "yy_ec[YY_SC_TO_UI(*++yy_cp)]" :
504 "YY_SC_TO_UI(*++yy_cp)";
509 "while ( (yy_current_state = yy_nxt[yy_current_state][%s]) > 0 )",
514 if ( num_backing_up > 0 )
516 indent_puts( "{" ); /* } for vi */
521 indent_puts( "++yy_cp;" );
523 if ( num_backing_up > 0 )
530 indent_puts( "yy_current_state = -yy_current_state;" );
535 indent_puts( "{" ); /* } for vi */
537 "yyconst struct yy_trans_info *yy_trans_info;\n" );
538 indent_puts( "YY_CHAR yy_c;\n" );
539 indent_put2s( "for ( yy_c = %s;", char_map );
541 " (yy_trans_info = &yy_current_state[(unsigned int) yy_c])->" );
542 indent_puts( "yy_verify == yy_c;" );
543 indent_put2s( " yy_c = %s )", char_map_2 );
547 if ( num_backing_up > 0 )
548 indent_puts( "{" ); /* } for vi */
550 indent_puts( "yy_current_state += yy_trans_info->yy_nxt;" );
552 if ( num_backing_up > 0 )
555 gen_backing_up(); /* { for vi */
559 indent_down(); /* { for vi */
568 indent_puts( "{" ); /* } for vi */
570 gen_next_state( false );
572 indent_puts( "++yy_cp;" );
581 out_dec( "while ( yy_base[yy_current_state] != %d );\n",
584 out_dec( "while ( yy_current_state != %d );\n",
587 if ( ! reject && ! interactive )
589 /* Do the guaranteed-needed backing up to figure out
592 indent_puts( "yy_cp = yy_last_accepting_cpos;" );
594 "yy_current_state = yy_last_accepting_state;" );
600 /* Generate the code to find the next state. */
602 void gen_next_state( worry_about_NULs )
603 int worry_about_NULs;
604 { /* NOTE - changes in here should be reflected in gen_next_match() */
607 if ( worry_about_NULs && ! nultrans )
610 (void) sprintf( char_map,
611 "(*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : %d)",
614 (void) sprintf( char_map,
615 "(*yy_cp ? YY_SC_TO_UI(*yy_cp) : %d)", NUL_ec );
619 strcpy( char_map, useecs ?
620 "yy_ec[YY_SC_TO_UI(*yy_cp)]" : "YY_SC_TO_UI(*yy_cp)" );
622 if ( worry_about_NULs && nultrans )
624 if ( ! fulltbl && ! fullspd )
625 /* Compressed tables back up *before* they match. */
628 indent_puts( "if ( *yy_cp )" );
630 indent_puts( "{" ); /* } for vi */
635 "yy_current_state = yy_nxt[yy_current_state][%s];",
640 "yy_current_state += yy_current_state[%s].yy_nxt;",
644 gen_next_compressed_state( char_map );
646 if ( worry_about_NULs && nultrans )
651 indent_puts( "else" );
654 "yy_current_state = yy_NUL_trans[yy_current_state];" );
658 if ( fullspd || fulltbl )
662 indent_puts( "*yy_state_ptr++ = yy_current_state;" );
666 /* Generate the code to make a NUL transition. */
669 { /* NOTE - changes in here should be reflected in gen_next_match() */
670 /* Only generate a definition for "yy_cp" if we'll generate code
671 * that uses it. Otherwise lint and the like complain.
673 int need_backing_up = (num_backing_up > 0 && ! reject);
675 if ( need_backing_up && (! nultrans || fullspd || fulltbl) )
676 /* We're going to need yy_cp lying around for the call
677 * below to gen_backing_up().
679 indent_puts( "char *yy_cp = yy_c_buf_p;" );
686 "yy_current_state = yy_NUL_trans[yy_current_state];" );
687 indent_puts( "yy_is_jam = (yy_current_state == 0);" );
693 out_dec( "yy_current_state = yy_nxt[yy_current_state][%d];\n",
695 indent_puts( "yy_is_jam = (yy_current_state <= 0);" );
701 out_dec( "int yy_c = %d;\n", NUL_ec );
704 "yyconst struct yy_trans_info *yy_trans_info;\n" );
706 "yy_trans_info = &yy_current_state[(unsigned int) yy_c];" );
707 indent_puts( "yy_current_state += yy_trans_info->yy_nxt;" );
710 "yy_is_jam = (yy_trans_info->yy_verify != yy_c);" );
717 (void) sprintf( NUL_ec_str, "%d", NUL_ec );
718 gen_next_compressed_state( NUL_ec_str );
721 out_dec( "yy_is_jam = (yy_current_state == %d);\n", jamstate );
725 /* Only stack this state if it's a transition we
726 * actually make. If we stack it on a jam, then
727 * the state stack and yy_c_buf_p get out of sync.
729 indent_puts( "if ( ! yy_is_jam )" );
731 indent_puts( "*yy_state_ptr++ = yy_current_state;" );
736 /* If we've entered an accepting state, back up; note that
737 * compressed tables have *already* done such backing up, so
738 * we needn't bother with it again.
740 if ( need_backing_up && (fullspd || fulltbl) )
743 indent_puts( "if ( ! yy_is_jam )" );
753 /* Generate the code to find the start state. */
755 void gen_start_state()
762 "yy_current_state = yy_start_state_list[yy_start + YY_AT_BOL()];" );
766 "yy_current_state = yy_start_state_list[yy_start];" );
771 indent_puts( "yy_current_state = yy_start;" );
774 indent_puts( "yy_current_state += YY_AT_BOL();" );
778 /* Set up for storing up states. */
779 indent_puts( "yy_state_ptr = yy_state_buf;" );
780 indent_puts( "*yy_state_ptr++ = yy_current_state;" );
786 /* gentabs - generate data statements for the transition tables */
790 int i, j, k, *accset, nacc, *acc_array, total_states;
791 int end_of_buffer_action = num_rules + 1;
793 acc_array = allocate_integer_array( current_max_dfas );
796 /* The compressed table format jams by entering the "jam state",
797 * losing information about the previous state in the process.
798 * In order to recover the previous state, we effectively need
799 * to keep backing-up information.
805 /* Write out accepting list and pointer list.
807 * First we generate the "yy_acclist" array. In the process,
808 * we compute the indices that will go into the "yy_accept"
809 * array, and save the indices in the dfaacc array.
811 int EOB_accepting_list[2];
813 /* Set up accepting structures for the End Of Buffer state. */
814 EOB_accepting_list[0] = 0;
815 EOB_accepting_list[1] = end_of_buffer_action;
816 accsiz[end_of_buffer_state] = 1;
817 dfaacc[end_of_buffer_state].dfaacc_set = EOB_accepting_list;
819 out_str_dec( long_align ? C_long_decl : C_short_decl,
820 "yy_acclist", MAX( numas, 1 ) + 1 );
822 j = 1; /* index into "yy_acclist" array */
824 for ( i = 1; i <= lastdfa; ++i )
828 if ( accsiz[i] != 0 )
830 accset = dfaacc[i].dfaacc_set;
835 _( "state # %d accepts: " ),
838 for ( k = 1; k <= nacc; ++k )
840 int accnum = accset[k];
844 if ( variable_trailing_context_rules &&
845 ! (accnum & YY_TRAILING_HEAD_MASK) &&
846 accnum > 0 && accnum <= num_rules &&
847 rule_type[accnum] == RULE_VARIABLE )
849 /* Special hack to flag
850 * accepting number as part
851 * of trailing context rule.
853 accnum |= YY_TRAILING_MASK;
860 fprintf( stderr, "[%d]",
864 fputs( ", ", stderr );
866 putc( '\n', stderr );
872 /* add accepting number for the "jam" state */
880 dfaacc[end_of_buffer_state].dfaacc_state = end_of_buffer_action;
882 for ( i = 1; i <= lastdfa; ++i )
883 acc_array[i] = dfaacc[i].dfaacc_state;
885 /* add accepting number for jam state */
889 /* Spit out "yy_accept" array. If we're doing "reject", it'll be
890 * pointers into the "yy_acclist" array. Otherwise it's actual
891 * accepting numbers. In either case, we just dump the numbers.
894 /* "lastdfa + 2" is the size of "yy_accept"; includes room for C arrays
895 * beginning at 0 and for "jam" state.
900 /* We put a "cap" on the table associating lists of accepting
901 * numbers with state numbers. This is needed because we tell
902 * where the end of an accepting list is by looking at where
903 * the list for the next state starts.
907 out_str_dec( long_align ? C_long_decl : C_short_decl, "yy_accept", k );
909 for ( i = 1; i <= lastdfa; ++i )
911 mkdata( acc_array[i] );
913 if ( ! reject && trace && acc_array[i] )
914 fprintf( stderr, _( "state # %d accepts: [%d]\n" ),
918 /* Add entry for "jam" state. */
919 mkdata( acc_array[i] );
922 /* Add "cap" for the list. */
923 mkdata( acc_array[i] );
932 /* Write out meta-equivalence classes (used to index
937 fputs( _( "\n\nMeta-Equivalence Classes:\n" ),
940 out_str_dec( C_int_decl, "yy_meta", numecs + 1 );
942 for ( i = 1; i <= numecs; ++i )
945 fprintf( stderr, "%d = %d\n",
946 i, ABS( tecbck[i] ) );
948 mkdata( ABS( tecbck[i] ) );
954 total_states = lastdfa + numtemps;
956 out_str_dec( (tblend >= MAX_SHORT || long_align) ?
957 C_long_decl : C_short_decl,
958 "yy_base", total_states + 1 );
960 for ( i = 1; i <= lastdfa; ++i )
964 if ( base[i] == JAMSTATE )
972 /* Template reference. */
974 def[i] = lastdfa - d + 1;
980 /* Generate jam state's base index. */
983 for ( ++i /* skip jam state */; i <= total_states; ++i )
991 out_str_dec( (total_states >= MAX_SHORT || long_align) ?
992 C_long_decl : C_short_decl,
993 "yy_def", total_states + 1 );
995 for ( i = 1; i <= total_states; ++i )
1000 out_str_dec( (total_states >= MAX_SHORT || long_align) ?
1001 C_long_decl : C_short_decl,
1002 "yy_nxt", tblend + 1 );
1004 for ( i = 1; i <= tblend; ++i )
1006 /* Note, the order of the following test is important.
1007 * If chk[i] is 0, then nxt[i] is undefined.
1009 if ( chk[i] == 0 || nxt[i] == 0 )
1010 nxt[i] = jamstate; /* new state is the JAM state */
1017 out_str_dec( (total_states >= MAX_SHORT || long_align) ?
1018 C_long_decl : C_short_decl,
1019 "yy_chk", tblend + 1 );
1021 for ( i = 1; i <= tblend; ++i )
1033 /* Write out a formatted string (with a secondary string argument) at the
1034 * current indentation level, adding a final newline.
1037 void indent_put2s( fmt, arg )
1041 out_str( fmt, arg );
1046 /* Write out a string at the current indentation level, adding a final
1050 void indent_puts( str )
1058 /* make_tables - generate transition tables and finishes generating output file
1064 int did_eof_rule = false;
1068 /* First, take care of YY_DO_BEFORE_ACTION depending on yymore
1073 if ( yymore_used && ! yytext_is_array )
1075 indent_puts( "yytext_ptr -= yy_more_len; \\" );
1076 indent_puts( "yyleng = (int) (yy_cp - yytext_ptr); \\" );
1080 indent_puts( "yyleng = (int) (yy_cp - yy_bp); \\" );
1082 /* Now also deal with copying yytext_ptr to yytext if needed. */
1084 if ( yytext_is_array )
1088 "if ( yyleng + yy_more_offset >= YYLMAX ) \\" );
1090 indent_puts( "if ( yyleng >= YYLMAX ) \\" );
1094 "YY_FATAL_ERROR( \"token too large, exceeds YYLMAX\" ); \\" );
1100 "yy_flex_strncpy( &yytext[yy_more_offset], yytext_ptr, yyleng + 1 ); \\" );
1101 indent_puts( "yyleng += yy_more_offset; \\" );
1103 "yy_prev_more_offset = yy_more_offset; \\" );
1104 indent_puts( "yy_more_offset = 0; \\" );
1109 "yy_flex_strncpy( yytext, yytext_ptr, yyleng + 1 ); \\" );
1118 out_dec( "#define YY_NUM_RULES %d\n", num_rules );
1119 out_dec( "#define YY_END_OF_BUFFER %d\n", num_rules + 1 );
1123 /* Need to define the transet type as a size large
1124 * enough to hold the biggest offset.
1126 int total_table_size = tblend + numecs + 1;
1127 char *trans_offset_type =
1128 (total_table_size >= MAX_SHORT || long_align) ?
1132 indent_puts( "struct yy_trans_info" );
1134 indent_puts( "{" ); /* } for vi */
1137 indent_puts( "long yy_verify;" );
1139 indent_puts( "short yy_verify;" );
1141 /* In cases where its sister yy_verify *is* a "yes, there is
1142 * a transition", yy_nxt is the offset (in records) to the
1143 * next state. In most cases where there is no transition,
1144 * the value of yy_nxt is irrelevant. If yy_nxt is the -1th
1145 * record of a state, though, then yy_nxt is the action number
1149 indent_put2s( "%s yy_nxt;", trans_offset_type );
1150 indent_puts( "};" );
1161 /* Definitions for backing up. We don't need them if REJECT
1162 * is being used because then we use an alternative backin-up
1163 * technique instead.
1165 if ( num_backing_up > 0 && ! reject )
1167 if ( ! C_plus_plus )
1170 "static yy_state_type yy_last_accepting_state;" );
1172 "static char *yy_last_accepting_cpos;\n" );
1178 out_str_dec( C_state_decl, "yy_NUL_trans", lastdfa + 1 );
1180 for ( i = 1; i <= lastdfa; ++i )
1183 out_dec( " &yy_transition[%d],\n", base[i] );
1185 mkdata( nultrans[i] );
1192 { /* Spit out table mapping rules to line numbers. */
1193 if ( ! C_plus_plus )
1195 indent_puts( "extern int yy_flex_debug;" );
1196 indent_puts( "int yy_flex_debug = 1;\n" );
1199 out_str_dec( long_align ? C_long_decl : C_short_decl,
1200 "yy_rule_linenum", num_rules );
1201 for ( i = 1; i < num_rules; ++i )
1202 mkdata( rule_linenum[i] );
1208 /* Declare state buffer variables. */
1209 if ( ! C_plus_plus )
1212 "static yy_state_type yy_state_buf[YY_BUF_SIZE + 2], *yy_state_ptr;" );
1213 outn( "static char *yy_full_match;" );
1214 outn( "static int yy_lp;" );
1217 if ( variable_trailing_context_rules )
1219 if ( ! C_plus_plus )
1222 "static int yy_looking_for_trail_begin = 0;" );
1223 outn( "static int yy_full_lp;" );
1224 outn( "static int *yy_full_state;" );
1227 out_hex( "#define YY_TRAILING_MASK 0x%x\n",
1228 (unsigned int) YY_TRAILING_MASK );
1229 out_hex( "#define YY_TRAILING_HEAD_MASK 0x%x\n",
1230 (unsigned int) YY_TRAILING_HEAD_MASK );
1233 outn( "#define REJECT \\" );
1234 outn( "{ \\" ); /* } for vi */
1236 "*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ \\" );
1238 "yy_cp = yy_full_match; /* restore poss. backed-over text */ \\" );
1240 if ( variable_trailing_context_rules )
1243 "yy_lp = yy_full_lp; /* restore orig. accepting pos. */ \\" );
1245 "yy_state_ptr = yy_full_state; /* restore orig. state */ \\" );
1247 "yy_current_state = *yy_state_ptr; /* restore curr. state */ \\" );
1250 outn( "++yy_lp; \\" );
1251 outn( "goto find_rule; \\" );
1259 "/* The intent behind this definition is that it'll catch" );
1260 outn( " * any uses of REJECT which flex missed." );
1262 outn( "#define REJECT reject_used_but_not_detected" );
1267 if ( ! C_plus_plus )
1269 if ( yytext_is_array )
1271 indent_puts( "static int yy_more_offset = 0;" );
1273 "static int yy_prev_more_offset = 0;" );
1277 indent_puts( "static int yy_more_flag = 0;" );
1278 indent_puts( "static int yy_more_len = 0;" );
1282 if ( yytext_is_array )
1285 "#define yymore() (yy_more_offset = yy_flex_strlen( yytext ))" );
1286 indent_puts( "#define YY_NEED_STRLEN" );
1287 indent_puts( "#define YY_MORE_ADJ 0" );
1288 indent_puts( "#define YY_RESTORE_YY_MORE_OFFSET \\" );
1290 indent_puts( "{ \\" );
1291 indent_puts( "yy_more_offset = yy_prev_more_offset; \\" );
1292 indent_puts( "yyleng -= yy_more_offset; \\" );
1298 indent_puts( "#define yymore() (yy_more_flag = 1)" );
1299 indent_puts( "#define YY_MORE_ADJ yy_more_len" );
1300 indent_puts( "#define YY_RESTORE_YY_MORE_OFFSET" );
1306 indent_puts( "#define yymore() yymore_used_but_not_detected" );
1307 indent_puts( "#define YY_MORE_ADJ 0" );
1308 indent_puts( "#define YY_RESTORE_YY_MORE_OFFSET" );
1311 if ( ! C_plus_plus )
1313 if ( yytext_is_array )
1315 outn( "#ifndef YYLMAX" );
1316 outn( "#define YYLMAX 8192" );
1318 outn( "char yytext[YYLMAX];" );
1319 outn( "char *yytext_ptr;" );
1323 outn( "char *yytext;" );
1326 out( &action_array[defs1_offset] );
1328 line_directive_out( stdout, 0 );
1332 if ( ! C_plus_plus )
1337 "\tif ( (result = read( fileno(yyin), (char *) buf, max_size )) < 0 ) \\" );
1339 "\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" );" );
1345 "\tif ( yy_current_buffer->yy_is_interactive ) \\" );
1347 outn( "\t\tint c = '*', n; \\" );
1348 outn( "\t\tfor ( n = 0; n < max_size && \\" );
1349 outn( "\t\t\t (c = getc( yyin )) != EOF && c != '\\n'; ++n ) \\" );
1350 outn( "\t\t\tbuf[n] = (char) c; \\" );
1351 outn( "\t\tif ( c == '\\n' ) \\" );
1352 outn( "\t\t\tbuf[n++] = (char) c; \\" );
1353 outn( "\t\tif ( c == EOF && ferror( yyin ) ) \\" );
1355 "\t\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" ); \\" );
1356 outn( "\t\tresult = n; \\" );
1359 "\telse if ( ((result = fread( buf, 1, max_size, yyin )) == 0) \\" );
1360 outn( "\t\t && ferror( yyin ) ) \\" );
1362 "\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" );" );
1368 indent_puts( "#define YY_RULE_SETUP \\" );
1372 indent_puts( "if ( yyleng > 0 ) \\" );
1374 indent_puts( "yy_current_buffer->yy_at_bol = \\" );
1375 indent_puts( "\t\t(yytext[yyleng - 1] == '\\n'); \\" );
1378 indent_puts( "YY_USER_ACTION" );
1383 /* Copy prolog to output file. */
1384 out( &action_array[prolog_offset] );
1386 line_directive_out( stdout, 0 );
1392 if ( yymore_used && ! yytext_is_array )
1394 indent_puts( "yy_more_len = 0;" );
1395 indent_puts( "if ( yy_more_flag )" );
1398 indent_puts( "yy_more_len = yy_c_buf_p - yytext_ptr;" );
1399 indent_puts( "yy_more_flag = 0;" );
1408 /* Note, don't use any indentation. */
1409 outn( "yy_match:" );
1419 indent_puts( "if ( yy_act != YY_END_OF_BUFFER )" );
1422 indent_puts( "int yyl;" );
1423 indent_puts( "for ( yyl = 0; yyl < yyleng; ++yyl )" );
1425 indent_puts( "if ( yytext[yyl] == '\\n' )" );
1427 indent_puts( "++yylineno;" );
1437 indent_puts( "if ( yy_flex_debug )" );
1441 indent_puts( "if ( yy_act == 0 )" );
1443 indent_puts( C_plus_plus ?
1444 "cerr << \"--scanner backing up\\n\";" :
1445 "fprintf( stderr, \"--scanner backing up\\n\" );" );
1449 out_dec( "else if ( yy_act < %d )\n", num_rules );
1455 "cerr << \"--accepting rule at line \" << yy_rule_linenum[yy_act] <<" );
1457 " \"(\\\"\" << yytext << \"\\\")\\n\";" );
1462 "fprintf( stderr, \"--accepting rule at line %d (\\\"%s\\\")\\n\"," );
1465 " yy_rule_linenum[yy_act], yytext );" );
1471 out_dec( "else if ( yy_act == %d )\n", num_rules );
1477 "cerr << \"--accepting default rule (\\\"\" << yytext << \"\\\")\\n\";" );
1482 "fprintf( stderr, \"--accepting default rule (\\\"%s\\\")\\n\"," );
1483 indent_puts( " yytext );" );
1489 out_dec( "else if ( yy_act == %d )\n", num_rules + 1 );
1492 indent_puts( C_plus_plus ?
1493 "cerr << \"--(end of buffer or a NUL)\\n\";" :
1494 "fprintf( stderr, \"--(end of buffer or a NUL)\\n\" );" );
1505 "cerr << \"--EOF (start condition \" << YY_START << \")\\n\";" );
1510 "fprintf( stderr, \"--EOF (start condition %d)\\n\", YY_START );" );
1519 /* Copy actions to output file. */
1523 out( &action_array[action_offset] );
1525 line_directive_out( stdout, 0 );
1527 /* generate cases for any missing EOF rules */
1528 for ( i = 1; i <= lastsc; ++i )
1532 out_str( "case YY_STATE_EOF(%s):\n", scname[i] );
1533 did_eof_rule = true;
1539 indent_puts( "yyterminate();" );
1544 /* Generate code for handling NUL's, if needed. */
1546 /* First, deal with backing up and setting up yy_cp if the scanner
1547 * finds that it should JAM on the NUL.
1552 if ( fullspd || fulltbl )
1553 indent_puts( "yy_cp = yy_c_buf_p;" );
1556 { /* compressed table */
1557 if ( ! reject && ! interactive )
1559 /* Do the guaranteed-needed backing up to figure
1562 indent_puts( "yy_cp = yy_last_accepting_cpos;" );
1564 "yy_current_state = yy_last_accepting_state;" );
1568 /* Still need to initialize yy_cp, though
1569 * yy_current_state was set up by
1570 * yy_get_previous_state().
1572 indent_puts( "yy_cp = yy_c_buf_p;" );
1576 /* Generate code for yy_get_previous_state(). */
1584 gen_next_state( true );
1592 { /* update yylineno inside of unput() */
1593 indent_puts( "if ( c == '\\n' )" );
1595 indent_puts( "--yylineno;" );
1600 /* Update BOL and yylineno inside of input(). */
1603 indent_puts( "yy_current_buffer->yy_at_bol = (c == '\\n');" );
1606 indent_puts( "if ( yy_current_buffer->yy_at_bol )" );
1608 indent_puts( "++yylineno;" );
1613 else if ( do_yylineno )
1615 indent_puts( "if ( c == '\\n' )" );
1617 indent_puts( "++yylineno;" );
1623 /* Copy remainder of input to output. */
1625 line_directive_out( stdout, 1 );
1628 (void) flexscan(); /* copy remainder of input to output */