Bug Summary

File:dmake/rulparse.c
Location:line 1334, column 7
Description:Dereference of null pointer (loaded from variable 'cp')

Annotated Source Code

1/*
2--
3-- SYNOPSIS
4-- Perform semantic analysis on input
5--
6-- DESCRIPTION
7-- This code performs semantic analysis on the input, and builds
8-- the complex internal datastructure that is used to represent
9-- the user makefile.
10--
11-- AUTHOR
12-- Dennis Vadura, dvadura@dmake.wticorp.com
13--
14-- WWW
15-- http://dmake.wticorp.com/
16--
17-- COPYRIGHT
18-- Copyright (c) 1996,1997 by WTI Corp. All rights reserved.
19--
20-- This program is NOT free software; you can redistribute it and/or
21-- modify it under the terms of the Software License Agreement Provided
22-- in the file <distribution-root>/readme/license.txt.
23--
24-- LOG
25-- Use cvs log to obtain detailed change logs.
26*/
27
28#include "extern.h"
29
30/* prototypes for local functions */
31static void _add_indirect_prereq ANSI((CELLPTR))(CELLPTR);
32static int _add_root ANSI((CELLPTR))(CELLPTR);
33static CELLPTR _build_graph ANSI((int, CELLPTR, CELLPTR))(int, CELLPTR, CELLPTR);
34static char* _build_meta ANSI((char*))(char*);
35static int _do_magic ANSI((int, char*, CELLPTR, CELLPTR, t_attr, char*))(int, char*, CELLPTR, CELLPTR, t_attr, char*);
36static void _do_special ANSI((int, int, t_attr,char*,CELLPTR,CELLPTR,int*))(int, int, t_attr,char*,CELLPTR,CELLPTR,int*);
37static int _do_targets ANSI((int, t_attr, char*, CELLPTR, CELLPTR))(int, t_attr, char*, CELLPTR, CELLPTR);
38static t_attr _is_attribute ANSI((char*))(char*);
39static int _is_special ANSI((char*))(char*);
40static char* _is_magic ANSI((char*))(char*);
41static int _is_percent ANSI((char*))(char*);
42static CELLPTR _make_multi ANSI((CELLPTR))(CELLPTR);
43static CELLPTR _replace_cell ANSI((CELLPTR,CELLPTR,CELLPTR))(CELLPTR,CELLPTR,CELLPTR);
44static void _set_attributes ANSI((t_attr, char*, CELLPTR ))(t_attr, char*, CELLPTR );
45static void _stick_at_head ANSI((CELLPTR, CELLPTR))(CELLPTR, CELLPTR);
46static void _set_global_attr ANSI((t_attr))(t_attr);
47
48
49/* static variables that must persist across invocation of Parse_rule_def */
50static CELLPTR _sv_targets = NIL(CELL)((CELL*)((void*)0));
51static STRINGPTR _sv_rules = NIL(STRING)((STRING*)((void*)0)); /* first recipe element. */
52static STRINGPTR _sv_crule = NIL(STRING)((STRING*)((void*)0)); /* current/last recipe element. */
53static CELLPTR _sv_edgel = NIL(CELL)((CELL*)((void*)0));
54static LINKPTR _sv_ind_prq = NIL(LINK)((LINK*)((void*)0)); /* indirect prerequisites for % cell */
55static int _sp_target = FALSE0;
56static t_attr _sv_attr;
57static int _sv_flag;
58static int _sv_op;
59static char *_sv_setdir;
60static char _sv_globprq_only = 0;
61
62/* Define for global attribute mask (A_SWAP == A_WINPATH) */
63#define A_GLOB(0x00001 | 0x00002 | 0x00020 | 0x00008 | 0x01000 | 0x00800 | 0x00010
| 0x00080 | 0x00200 | 0x02000 ) (A_PRECIOUS0x00001 | A_SILENT0x00002 | A_IGNORE0x00020 | A_EPILOG0x00008 | A_SWAP0x01000 |\
64 A_SHELL0x00800 | A_PROLOG0x00010 | A_NOINFER0x00080 | A_SEQ0x00200 | A_MKSARGS0x02000 )
65
66
67PUBLIC int
68Parse_rule_def( state )/*
69=========================
70 Parse the rule definition contained in Buffer, and modify the state
71 if appropriate. The function returns 0, if the definition is found to
72 be an illegal rule definition, and it returns 1 if it is a rule definition.
73 */
74int *state;
75{
76 TKSTR input; /* input string struct for token search */
77 CELLPTR targets; /* list of targets if any */
78 CELLPTR prereq; /* list of prereq if any */
79 CELLPTR prereqtail; /* tail of prerequisite list */
80 CELLPTR cp; /* temporary cell pointer for list making */
81 char *result; /* temporary storage for result */
82 char *tok; /* temporary pointer for tokens */
83 char *set_dir; /* value of setdir attribute */
84 char *brk; /* break char list for Get_token */
85 char *firstrcp; /* first recipe line, from ; in rule line */
86 t_attr attr; /* sum of attribute flags for current tgts*/
87 t_attr at; /* temp place to keep an attribute code */
88 int op; /* rule operator */
89 int special; /* indicate special targets in rule */
90 int augmeta; /* indicate .<suffix> like target */
91 int percent; /* indicate percent rule target */
92 int percent_prq; /* indicate mixed %-rule prereq possible */
93
94 DB_ENTER( "Parse_rule_def" );
95
96 op = 0;
97 attr = 0;
98 special = 0;
99 augmeta = 0;
100 percent = 0;
101 set_dir = NIL( char )((char*)((void*)0));
102 targets = NIL(CELL)((CELL*)((void*)0));
103 prereq = NIL(CELL)((CELL*)((void*)0));
104 prereqtail = NIL(CELL)((CELL*)((void*)0));
105 percent_prq = 0;
106
107 /* Check to see if the line is of the form:
108 * targets : prerequisites; first recipe line
109 * If so remember the first_recipe part of the line. */
110
111 firstrcp = strchr( Buffer, ';' );
112 if( firstrcp != NIL( char )((char*)((void*)0)) ) {
113 *firstrcp++ = 0;
114 firstrcp = DmStrSpn( firstrcp, " \t" );
115 }
116
117 result = Expand( Buffer );
118 /* Remove CONTINUATION_CHAR, keep the <nl> */
119 for( brk=strchr(result,CONTINUATION_CHAR'\\'); brk != NIL(char)((char*)((void*)0)); brk=strchr(brk,CONTINUATION_CHAR'\\') )
120 if( brk[1] == '\n' )
121 *brk = ' ';
122 else
123 brk++;
124
125 DB_PRINT( "par", ("Scanning: [%s]", result) );
126
127 SET_TOKEN( &input, result )(&input)->tk_str = (result); (&input)->tk_cchar
= *(result); (&input)->tk_quote = 1;;
128 brk = ":-^!|";
129 Def_targets = TRUE1;
130
131 /* Scan the input rule line collecting targets, the operator, and any
132 * prerequisites. Stop when we run out of targets and prerequisites. */
133
134 while( *(tok = Get_token( &input, brk, TRUE1 )) != '\0' )
135 if( !op ) {
136 /* we are scanning targets and attributes
137 * check to see if token is an operator. */
138
139 op = Rule_op( tok );
140
141 if( !op ) {
142 /* Define a new cell, or get pointer to pre-existing cell. */
143 /* Do we need cells for attributes? If not move the definition
144 * to the target part. */
145 cp = Def_cell( tok );
146 /* A $ character indicates either a literal $ in the pathname (this
147 * was broken before) or a dynamic macro (this is a syntax error).
148 * FIXME: Here would be the place to add a sanity check. */
149 DB_PRINT( "par", ("tg_cell [%s]", tok) );
150
151 if( (at = _is_attribute(tok)) != 0 ) {
152 /* Ignore .SILENT when -vr is active. */
153 if( (Verbose & V_FORCEECHO0x80) && (at == A_SILENT0x00002) )
154 at = 0;
155
156 /* Logically OR the attributes specified into one main
157 * ATTRIBUTE mask. */
158
159 if( at == A_SETDIR0x00400 ) {
160 if( set_dir != NIL( char )((char*)((void*)0)) )
161 Warning( "Multiple .SETDIR attribute ignored" );
162 else
163 set_dir = DmStrDup( tok );
164 }
165
166 attr |= at;
167 }
168 else {
169 /* Not an attribute, this must be a target. */
170 int tmp;
171
172 tmp = _is_special( tok );
173
174 if( _is_percent( tok ) ) {
175 /* First %-target checks if there were non-%-targets before. */
176 if( !percent && targets != NIL(CELL)((CELL*)((void*)0)) )
177 Fatal( "A %%-target must not be mixed with non-%%-targets, offending target [%s]", tok );
178
179 percent++;
180 cp->ce_flag |= F_PERCENT0x0800;
181 } else {
182 if( percent )
183 Fatal( "A non-%%-target must not be mixed with %%-targets, offending target [%s]", tok );
184 }
185
186 if( _is_magic( tok ) ) {
187 /* Check that AUGMAKE targets are not mixed with other
188 * targets. The return value of _is_magic() is discarded and
189 * calculated again in _do_targets() if this rule definition
190 * really is a .<suffix> like target.
191 * If we would allow only one target per line we could easily
192 * store the result for later, but for multiple .<suffix>
193 * targets this creates too much overhead.
194 * These targets should be rare (obsolete?) anyway. */
195 if( !augmeta && targets != NIL(CELL)((CELL*)((void*)0)) )
196 Fatal( "An AUGMAKE meta target must not be mixed with non AUGMAKE meta targets, offending target [%s]", tok );
197
198 augmeta++;
199 cp->ce_flag |= F_MAGIC0x2000; /* do_magic will also add F_PERCENT later. */
200 } else {
201 if( augmeta )
202 Fatal( "A non AUGMAKE meta target must not be mixed with AUGMAKE meta targets, offending target [%s]", tok );
203 }
204
205 if( special )
206 Fatal( "Special target must appear alone, found [%s]", tok );
207 else if( !(cp->ce_flag & F_MARK0x0001) ) {
208 /* Targets are kept in this list in lexically sorted order.
209 * This allows for easy equality comparison of target
210 * sets.*/
211 CELLPTR prev,cur;
212 for(prev=NIL(CELL)((CELL*)((void*)0)),cur=targets;cur;prev=cur,cur=cur->ce_link)
213 if(strcmp(cur->CE_NAMEce_name->ht_name,cp->CE_NAMEce_name->ht_name) > 0)
214 break;
215
216 cp->ce_link = cur;
217
218 if (!prev)
219 targets = cp;
220 else
221 prev->ce_link = cp;
222
223 cp->ce_flag |= F_MARK0x0001 | F_EXPLICIT0x0400;
224 special = tmp;
225 }
226 else
227 Warning( "Duplicate target [%s]", cp->CE_NAMEce_name->ht_name );
228 }
229 }
230 else {
231 /* found an operator so empty out break list and clear mark
232 * bits on target list, setting them all to F_VISITED*/
233
234 brk = "";
235 for( cp=targets; cp != NIL(CELL)((CELL*)((void*)0)); cp=cp->ce_link ) {
236 cp->ce_flag ^= F_MARK0x0001;
237 cp->ce_flag |= F_VISITED0x0080;
238 }
239
240 Def_targets = FALSE0;
241 }
242 }
243 else {
244 /* Scanning prerequisites so build the prerequisite list. We use
245 * F_MARK flag to make certain we have only a single copy of the
246 * prerequisite in the list */
247
248 cp = Def_cell( tok );
249
250 /* %-prerequisits require eiter a %-target or this might be a rule of
251 * the "ATTRIBUTE_LIST : targets" form. */
252 if( _is_percent( tok ) ) {
253 if( percent || ((targets == NIL(CELL)((CELL*)((void*)0))) && attr) )
254 percent_prq = 1;
255 else
256 Fatal( "Syntax error in %% rule, missing %% target");
257 }
258
259 if( cp->ce_flag & F_VISITED0x0080 ) {
260 if( cp->ce_attr & A_COMPOSITE0x200000 )
261 continue;
262 else
263 Fatal( "Detected circular dependency in graph at [%s]",
264 cp->CE_NAMEce_name->ht_name );
265 }
266 else if( !(cp->ce_flag & F_MARK0x0001) ) {
267 DB_PRINT( "par", ("pq_cell [%s]", tok) );
268 cp->ce_flag |= F_MARK0x0001;
269
270 if( prereqtail == NIL(CELL)((CELL*)((void*)0)) ) /* keep prereq's in order */
271 prereq = cp;
272 else
273 prereqtail->ce_link = cp;
274
275 prereqtail = cp;
276 cp->ce_link = NIL(CELL)((CELL*)((void*)0));
277 }
278 else if( !(cp->ce_attr & A_LIBRARY0x00004) && (Verbose & V_WARNALL0x40))
279 Warning("Duplicate entry [%s] in prerequisite list",cp->CE_NAMEce_name->ht_name);
280 }
281
282 /* Check to see if we have a percent rule that has only global
283 * prerequisites, i.e. they are of the form: "%.a : foo".
284 * If so then set the flag so that later on, we don't issue
285 * an error if such targets supply an empty set of rules. */
286
287 if( percent && !percent_prq && (prereq != NIL(CELL)((CELL*)((void*)0))) )
288 _sv_globprq_only = 1;
289
290 /* It's ok to have targets with attributes, and no prerequisites, but it's
291 * not ok to have no targets and no attributes, or no operator */
292
293 CLEAR_TOKEN( &input )*(&input)->tk_str = (&input)->tk_cchar; FREE(result)free((char*)(result)); result = NIL(char)((char*)((void*)0));
294 if( !op ) {
295 DB_PRINT( "par", ("Not a rule [%s]", Buffer) );
296 DB_RETURN( 0 )return (0);
297 }
298
299 /* More than one percent target didn't work with prior versions. */
300#if 0
301 if( (percent > 1) && !(op & R_OP_OR32) )
302 Warning( "Prior to dmake 4.5 only one\n"
303 "%%-target per target-definition worked reliably. Check your makefiles.\n" );
304#endif
305
306 if( !attr && targets == NIL(CELL)((CELL*)((void*)0)) ) {
307 Fatal( "Missing targets or attributes in rule" );
308 if( set_dir != NIL( char )((char*)((void*)0))) FREE( set_dir )free((char*)(set_dir));
309 DB_RETURN( 0 )return (0);
310 }
311
312 /* We have established we have a legal rules line, so we must process it.
313 * In doing so we must handle any special targets. Special targets must
314 * appear alone possibly accompanied by attributes.
315 * NOTE: special != 0 ==> targets != NIL(CELL) */
316
317 if( prereqtail != NIL(CELL)((CELL*)((void*)0)) ) prereqtail->ce_link = NIL(CELL)((CELL*)((void*)0));
318
319 /* Clear out MARK bits used in duplicate checking. I originally wanted
320 * to do this as the lists get processed but that got too error prone
321 * so I bit the bullit and added these two loops. */
322
323 for( cp=prereq; cp != NIL(CELL)((CELL*)((void*)0)); cp=cp->ce_link ) cp->ce_flag &= ~F_MARK0x0001;
324 for( cp=targets; cp != NIL(CELL)((CELL*)((void*)0)); cp=cp->ce_link ) cp->ce_flag &= ~F_VISITED0x0080;
325
326 /* Check to see if the previous recipe was bound, if not the call
327 * Bind_rules_to_targets() to bind the recipe (_sv_rules) to the
328 * target(s) (_sv_targets). */
329 /* was: if( _sv_rules != NIL(STRING) ) Bind_rules_to_targets( F_DEFAULT );*/
330 /* Only Add_recipe_to_list() sets _sv_rules and Bind_rules_to_targets()
331 * clears the (static) variables again. Bind_rules_to_targets() is
332 * (should be) called after State is leaving RULE_SCAN in Parse().
333 * Abort if there are unbound recipes. FIXME: Remove this paragraph
334 * if this never occurs. */
335 if( _sv_rules != NIL(STRING)((STRING*)((void*)0)) )
336 Fatal( "Internal Error: _sv_rules not empty." );
337
338 /* Add the first recipe line to the list */
339 if( firstrcp != NIL( char )((char*)((void*)0)) )
340 Add_recipe_to_list( firstrcp, TRUE1, FALSE0 );
341
342 /* Save these prior to calling _do_targets, since _build_graph needs the
343 * _sv_setdir value for matching edges. */
344 _sv_op = op;
345 _sv_setdir = set_dir;
346
347 if( special )
348 /* _do_special() can alter *state */
349 _do_special( special, op, attr, set_dir, targets, prereq, state );
350 else
351 *state = _do_targets( op, attr, set_dir, targets, prereq );
352
353 if( (*state != RULE_SCAN1) && (_sv_rules != NIL(STRING)((STRING*)((void*)0))) )
354 Fatal( "Unexpected recipe found." );
355
356 DB_RETURN( 1 )return (1);
357}
358
359
360PUBLIC int
361Rule_op( op )/*
362================
363 Check the passed in op string and map it to one of the rule operators */
364char *op;
365{
366 int ret = 0;
367
368 DB_ENTER( "rule_op" );
369
370 if( *op == TGT_DEP_SEP':' ) {
371 ret = R_OP_CL1;
372 op++;
373
374 /* All rule operations begin with a :, but may include any one of the
375 * four modifiers. In order for the rule to be properly mapped we must
376 * check for each of the modifiers in turn, building up our return bit
377 * string. */
378
379 while( *op && ret )
380 switch( *op ) {
381 case ':': ret |= R_OP_DCL2; op++; break;
382 case '!': ret |= R_OP_BG4; op++; break;
383 case '^': ret |= R_OP_UP8; op++; break;
384 case '-': ret |= R_OP_MI16; op++; break;
385 case '|': ret |= R_OP_OR32; op++; break;
386
387 default : ret = 0; /* an invalid modifier, chuck whole string */
388 }
389
390 if( *op != '\0' ) ret = 0;
391 }
392
393 DB_RETURN( ret )return (ret);
394}
395
396
397PUBLIC void
398Add_recipe_to_list( rule, white_too, no_check )/*
399=================================================
400 Take the provided string and add it to the list of recipe lines
401 we are saving to be added to the list of targets we have built
402 previously. If white_too == TRUE add the rule EVEN IF it contains only
403 an empty string (whitespace is handled by Def_recipe()). */
404char *rule;
405int white_too;
406int no_check;
407{
408 DB_ENTER( "Add_recipe_to_list" );
409
410 if( rule != NIL( char )((char*)((void*)0)) && (*rule != '\0' || white_too) ) {
411 DB_PRINT( "par", ("Adding recipe [%s]", rule) );
412 _sv_crule = Def_recipe( rule, _sv_crule, white_too, no_check );
413
414 /* If _sv_rules is not yet set this must be the first recipe line,
415 * remember it. */
416 if( _sv_rules == NIL(STRING)((STRING*)((void*)0)) )
417 _sv_rules = _sv_crule;
418 }
419
420 DB_VOID_RETURNreturn;
421}
422
423
424PUBLIC void
425Bind_rules_to_targets( flag )/*
426===============================
427 Take the recipe lines we have defined and bind them with proper attributes
428 to the targets that were previously defined in the parse. The
429 attributes that get passed here are merged with those that are were
430 previously defined. (namely attribute F_SINGLE) */
431int flag;
432{
433 CELLPTR tg; /* pointer to current target in list */
434 LINKPTR lp; /* pointer to link cell */
435 int magic; /* TRUE if target of % or .xxx.yyy form */
436 int tflag; /* TRUE if we assigned targets here */
437
438 DB_ENTER( "Bind_rules_to_targets" );
439
440 /* This line is needed since Parse may call us twice when the last
441 * GROUP rule appears at the end of file. In this case the rules
442 * have already been bound and we want to ignore them. */
443
444 if( _sv_targets == NIL(CELL)((CELL*)((void*)0)) ) { DB_VOID_RETURNreturn; }
445
446 tflag = FALSE0;
447 flag |= (_sv_flag & F_SINGLE0x0004);
448 flag |= ((_sv_attr & A_GROUP0x02000000) ? F_GROUP0x0020 : 0);
449
450 for( tg = _sv_targets; tg != NIL(CELL)((CELL*)((void*)0)); tg = tg->ce_link ) {
451 DB_PRINT( "par", ("Binding to %s, %04x", tg->CE_NAME, tg->ce_flag) );
452 magic = tg->ce_flag & F_PERCENT0x0800;
453
454
455 /* NOTE: For targets that are magic or special we ignore any
456 * previously defined rules, ie. We throw away the old definition
457 * and use the new, otherwise we complain. */
458 if( !(tg->ce_flag & F_MULTI0x0002) && !magic && (tg->CE_RECIPEce_recipe != NIL(STRING)((STRING*)((void*)0)))
459 && !_sp_target && (_sv_rules != NIL(STRING)((STRING*)((void*)0))) )
460 Fatal( "Multiply defined recipe for target %s", tg->CE_NAMEce_name->ht_name );
461
462 if( (magic || _sp_target) && (_sv_rules == NIL(STRING)((STRING*)((void*)0))) &&
463 !(tg->ce_flag & F_SPECIAL0x0100) && !_sv_globprq_only )
464 Warning( "Empty recipe for special or meta target %s", tg->CE_NAMEce_name->ht_name );
465
466 if( magic ) {
467 CELLPTR ep;
468
469 for( ep=_sv_edgel; ep != NIL(CELL)((CELL*)((void*)0)); ep=ep->ce_link ) {
470 DB_PRINT( "par", ("ep address: %#x", ep) );
471 /* %.xx :| '%.yy' abc xx '%.tt' ; touch $@
472 * loops here ... */
473 _set_attributes( _sv_attr, _sv_setdir, ep );
474 ep->ce_flag |= (F_TARGET0x0008|flag);
475
476 if( _sv_rules != NIL(STRING)((STRING*)((void*)0)) ) {
477 ep->ce_recipe = _sv_rules;
478 ep->ce_indprq = _sv_ind_prq;
479 }
480 }
481 }
482 else {
483 tg->ce_attr |= _sv_attr;
484 tg->ce_flag |= flag;
485
486 if( _sv_rules != NIL(STRING)((STRING*)((void*)0)) ) {
487 tg->ce_recipe = _sv_rules;
488 tg->ce_flag |= F_RULES0x0010 | F_TARGET0x0008;
489
490 /* Bind the current set of prerequisites as belonging to the
491 * original recipe given for the target */
492 for( lp=tg->ce_prq; lp != NIL(LINK)((LINK*)((void*)0)); lp = lp->cl_next )
493 if( !(lp->cl_flag & F_VISITED0x0080) ) lp->cl_flag |= F_TARGET0x0008;
494 }
495 else for( lp=tg->ce_prq; lp != NIL(LINK)((LINK*)((void*)0)); lp = lp->cl_next )
496 lp->cl_flag |= F_VISITED0x0080;
497 }
498
499 tflag |= _add_root(tg);
500 }
501
502 if( tflag ) Target = TRUE1;
503 if( _sv_setdir ) FREE(_sv_setdir)free((char*)(_sv_setdir));
504 _sv_rules = NIL(STRING)((STRING*)((void*)0));
505 _sv_crule = NIL(STRING)((STRING*)((void*)0));
506 _sv_targets = NIL(CELL)((CELL*)((void*)0));
507 _sv_ind_prq = NIL(LINK)((LINK*)((void*)0));
508 _sv_edgel = NIL(CELL)((CELL*)((void*)0));
509 _sp_target = FALSE0;
510 _sv_globprq_only = 0;
511
512 DB_VOID_RETURNreturn;
513}
514
515
516
517PUBLIC int
518Set_group_attributes( list )/*
519==============================
520 Scan list looking for the standard @,-,% and + (as in recipe line
521 defs) (+ is set but ignored for group recipes)
522 and set the flags accordingly so that they apply when we bind the
523 rules to the appropriate targets.
524 Return TRUE if group recipe start '[' was found, otherwise FALSE. */
525char *list;
526{
527 int res = FALSE0;
528 char *s;
529
530 if ( !((_sv_attr|Glob_attr)&A_IGNOREGROUP0x10000) ) {
531 s = DmStrSpn(list,"@-%+ \t");
532 res = (*s == '[');
533 if( res ) {
534 /* Check for non-white space characters after the [. */
535 for( s++; *s && iswhite(*s)((*s == ' ') || (*s == '\t')) ; s++ )
536 ;
537 if( *s )
538 Warning("Found non-white space character after '[' in [%s].", list);
539
540 _sv_attr |= Rcp_attribute(list);
541 }
542 }
543
544 return(res);
545}
546
547
548static void
549_do_special( special, op, attr, set_dir, target, prereq, state )/*
550==================================================================
551 Process a special target (always only a single target). So far the only
552 special targets we have are those recognized by the _is_special function.
553 Some of the special targets can take recipes, they call _do_targets()
554 and (implicitly) set *state to to RULE_SCAN. Otherwise *state remains
555 unaffected, i.e. NORMAL_SCAN.
556
557 target is always only a single special target.
558
559 NOTE: For the cases of .IMPORT, and .INCLUDE, the cells created by the
560 parser are never freed. This is due to the fact that it is too much
561 trouble to get them out of the hash table once they are defined, and
562 if they are per chance used again it will be ok, anyway, since the
563 cell is not really used by the code below. */
564
565int special;
566int op;
567t_attr attr;
568char *set_dir;
569CELLPTR target;
570CELLPTR prereq;
571int *state;
572{
573 HASHPTR hp; /* pointer to macro def cell */
574 CELLPTR cp; /* temporary pointer into cells list */
575 CELLPTR dp; /* pointer to directory dir cell */
576 LINKPTR lp; /* pointer at prerequisite list */
577 char *dir; /* current dir to prepend */
578 char *path; /* resulting path to try to read */
579 char *name; /* File name for processing a .INCLUDE */
580 char *tmp; /* temporary string pointer */
581 FILE *fil; /* File descriptor returned by Openfile */
582
583 DB_ENTER( "_do_special" );
584
585 target->ce_flag = F_SPECIAL0x0100; /* mark the target as special */
586
587 switch( special ) {
588 case ST_EXPORT8:
589 for( ; prereq != NIL(CELL)((CELL*)((void*)0)); prereq = prereq->ce_link ) {
590 DB_PRINT( "par", ("Exporting [%s]", prereq->CE_NAME) );
591 hp = GET_MACRO( prereq->CE_NAME )Get_name(prereq->ce_name->ht_name, Macs, 0);
592
593 if( hp != NIL(HASH)((HASH*)((void*)0)) ) {
594 char *tmpstr = hp->ht_value;
595
596 if( tmpstr == NIL(char)((char*)((void*)0)) ) tmpstr = "";
597
598 if( Write_env_string( prereq->CE_NAMEce_name->ht_name, tmpstr ) != 0 )
599 Warning( "Could not export %s", prereq->CE_NAMEce_name->ht_name );
600 }
601 }
602 break;
603
604 /* Simply cause the parser to fail on the next input read */
605 case ST_EXIT12:
606 Skip_to_eof = TRUE1;
607 break;
608
609 case ST_IMPORT9:
610 for( ; prereq != NIL(CELL)((CELL*)((void*)0)); prereq = prereq->ce_link ) {
611 char *tmpstr;
612
613 DB_PRINT( "par", ("Importing [%s]", prereq->CE_NAME) );
614
615 if( strcmp(prereq->CE_NAMEce_name->ht_name, ".EVERYTHING") == 0 ) {
616 t_attr sattr = Glob_attr;
617 Glob_attr |= A_SILENT0x00002;
618
619 ReadEnvironment();
620
621 Glob_attr = sattr;
622 }
623 else {
624 tmpstr = Read_env_string( prereq->CE_NAMEce_name->ht_name );
625
626 if( tmpstr != NIL(char)((char*)((void*)0)) )
627 Def_macro(prereq->CE_NAMEce_name->ht_name, tmpstr, M_EXPANDED0x0008|M_LITERAL0x0020);
628 else
629 if( !((Glob_attr | attr) & A_IGNORE0x00020) )
630 Fatal("Imported macro `%s' not found",prereq->CE_NAMEce_name->ht_name);
631 }
632 }
633
634 attr &= ~A_IGNORE0x00020;
635 break;
636
637 case ST_INCLUDE5:
638 {
639 int pushed = FALSE0;
640 int first = (attr & A_FIRST0x20000000);
641 int ignore = (((Glob_attr | attr) & A_IGNORE0x00020) != 0);
642 int found = FALSE0;
643 int noinf = (attr & A_NOINFER0x00080);
644 LINKPTR prqlnk = NIL(LINK)((LINK*)((void*)0));
645 LINKPTR prqlst = NIL(LINK)((LINK*)((void*)0));
646
647 if( prereq == NIL(CELL)((CELL*)((void*)0)) ) Fatal( "No .INCLUDE file(s) specified" );
648
649 dp = Def_cell( ".INCLUDEDIRS" );
650
651 if( (attr & A_SETDIR0x00400) && *(dir = strchr(set_dir, '=')+1) )
652 pushed = Push_dir( dir, ".INCLUDE", ignore );
653
654 for( cp=prereq; cp != NIL(CELL)((CELL*)((void*)0)); cp = cp->ce_link ) {
655 LINKPTR ltmp;
656 TALLOC(ltmp, 1, LINK)if ((ltmp = (LINK*) calloc((unsigned int)(1), (size_t)sizeof(
LINK))) == (LINK*)0) {No_ram();};
657 ltmp->cl_prq = cp;
658
659 if( prqlnk == NIL(LINK)((LINK*)((void*)0)) )
660 prqlst = ltmp;
661 else
662 prqlnk->cl_next = ltmp;
663
664 prqlnk = ltmp;
665 }
666
667 for( ; prqlst != NIL(LINK)((LINK*)((void*)0)); FREE(prqlst)free((char*)(prqlst)), prqlst=prqlnk ) {
668 prqlnk = prqlst->cl_next;
669 cp = prqlst->cl_prq;
670 name = cp->CE_NAMEce_name->ht_name;
671
672 /* Leave this here, it ensures that prqlst gets propely free'd */
673 if ( first && found )
674 continue;
675
676 if( *name == '<' ) {
677 /* We have a file name enclosed in <....>
678 * so get rid of the <> arround the file name */
679
680 name++;
681 if( (tmp = strrchr( name, '>' )) != NIL( char )((char*)((void*)0)) )
682 *tmp = 0;
683
684 if( If_root_path( name ) )
685 fil = Openfile( name, FALSE0, FALSE0 );
686 else
687 fil = NIL(FILE)((FILE*)((void*)0));
688 }
689 else
690 fil = Openfile( name, FALSE0, FALSE0 );
691
692 if( fil == NIL(FILE)((FILE*)((void*)0)) && !If_root_path( name ) ) { /*if true ==> not found in current dir*/
693
694 /* Now we must scan the list of prerequisites for .INCLUDEDIRS
695 * looking for the file in each of the specified directories.
696 * if we don't find it then we issue an error. The error
697 * message is suppressed if the .IGNORE attribute of attr is
698 * set. If a file is found we call Parse on the file to
699 * perform the parse and then continue on from where we left
700 * off. */
701
702 for(lp=dp->CE_PRQce_prq; lp && fil == NIL(FILE)((FILE*)((void*)0)); lp=lp->cl_next) {
703 dir = lp->cl_prq->CE_NAMEce_name->ht_name;
704 if( strchr(dir, '$') ) dir = Expand(dir);
705 path = Build_path( dir, name );
706
707 DB_PRINT( "par", ("Trying to include [%s]", path) );
708
709 fil = Openfile( path, FALSE0, FALSE0 );
710 if( dir != lp->cl_prq->CE_NAMEce_name->ht_name ) FREE(dir)free((char*)(dir));
711 }
712 }
713
714 if (!noinf && fil == NIL(FILE)((FILE*)((void*)0))) {
715 t_attr glob = Glob_attr;
716 t_attr cattr = prqlst->cl_prq->ce_attr;
717
718 prqlst->cl_next = NIL(LINK)((LINK*)((void*)0));
719 Glob_attr |= (attr&A_IGNORE0x00020);
720 prqlst->cl_prq->ce_attr &= ~A_FRINGE0x100000;
721
722 if( Verbose & V_FILE_IO0x20 )
723 printf( "%s: Inferring include file [%s].\n",
724 Pname, name );
725 fil = TryFiles(prqlst);
726
727 Glob_attr = glob;
728 prqlst->cl_prq->ce_attr |= (cattr & A_FRINGE0x100000);
729 }
730
731 if( fil != NIL(FILE)((FILE*)((void*)0)) ) {
732 if( Verbose & V_FILE_IO0x20 )
733 printf( "%s: Parsing include file [%s].\n",
734 Pname, name );
735 Parse( fil );
736 found = TRUE1;
737 }
738 else if( !(ignore || first) )
739 Fatal( "Include file %s, not found", name );
740 else if( Verbose & V_FILE_IO0x20 )
741 printf( "%s: Include file [%s] was not found.\n",
742 Pname, name );
743 }
744
745 if ( !ignore && first && !found )
746 Fatal( "No include file was found" );
747
748 if( pushed ) Pop_dir(FALSE0);
749 attr &= ~(A_IGNORE0x00020|A_SETDIR0x00400|A_FIRST0x20000000|A_NOINFER0x00080);
750 }
751 break;
752
753 case ST_SOURCE7:
754 if( prereq != NIL(CELL)((CELL*)((void*)0)) )
755 _do_targets( op & (R_OP_CL1 | R_OP_MI16 | R_OP_UP8), attr, set_dir,
756 target, prereq );
757 else {
758 /* The old semantics of .SOURCE were that an empty list of
759 * prerequisites clears the .SOURCE list. So we must implement
760 * that here as a clearout prerequisite operation. Since this is
761 * a standard operation with the :- opcode we can simply call the
762 * proper routine with the target cell and it should do the trick
763 */
764
765 if( op == R_OP_CL1 || (op & R_OP_MI16) )
766 Clear_prerequisites( target );
767 }
768
769 op &= ~(R_OP_MI16 | R_OP_UP8);
770 break;
771
772 case ST_KEEP11:
773 if( Keep_state != NIL(char)((char*)((void*)0)) ) break;
774 Def_macro( ".KEEP_STATE", "_state.mk", M_EXPANDED0x0008 );
775 break;
776
777 case ST_REST4:
778 /* The rest of the special targets can all take recipes, as such they
779 * must be able to affect the state of the parser. */
780
781 {
782 int s_targ = Target;
783
784 Target = TRUE1;
785 _sp_target = TRUE1;
786 *state = _do_targets( op, attr, set_dir, target, prereq );
787 Target = s_targ;
788
789 target->ce_flag |= F_TARGET0x0008;
790
791 attr = A_DEFAULT0x00000;
792 op = R_OP_CL1;
793 }
794 break;
795
796 default:break;
797 }
798
799 if( op != R_OP_CL1 ) Warning( "Modifier(s) for operator ignored" );
800 if( attr != A_DEFAULT0x00000 ) Warning( "Extra attributes ignored" );
801
802 DB_VOID_RETURNreturn;
803}
804
805
806static int
807_do_targets( op, attr, set_dir, targets, prereq )/*
808===================================================
809 Evaluate the values derived from the current target definition
810 line. Helper functions _build_graph(), _do_magic(), _make_multi(),
811 _add_root(), _replace_cell(), _set_attributes(), Clear_prerequisites()
812 _stick_at_head(), Add_prerequisite() and _set_global_attr() are used.
813 If successfull "_sv_targets" is set to "targets".
814 Return RULE_SCAN if a recipe is expected to follow, otherwise
815 NORMAL_SCAN. */
816int op; /* rule operator */
817t_attr attr; /* attribute flags for current targets */
818char *set_dir; /* value of setdir attribute */
819CELLPTR targets; /* list of targets (each cell maybe already
820 * defined by a previous target definition
821 * line. */
822CELLPTR prereq; /* list of prerequisites */
823{
824 CELLPTR tg1; /* temporary target pointer */
825 CELLPTR tp1; /* temporary prerequisite pointer */
826 LINKPTR prev_cell; /* pointer for .UPDATEALL processing */
827 char *p; /* temporary char pointer */
828 int tflag = FALSE0; /* set to TRUE if we add target to root */
829 int ret_state = RULE_SCAN1; /* Return state */
830
831 DB_ENTER( "_do_targets" );
832
833 /* If .UPDATEALL is set sort the target list that was temporary linked
834 * with ce_link into a list using ce_link with ce_set pointing to the first
835 * element. */
836 /* FIXME: Check that .UPDATEALL and %-targets on one line work together. */
837 if( attr & A_UPDATEALL0x00100 ) {
838 if( targets == NIL(CELL)((CELL*)((void*)0)) )
839 Fatal( ".UPDATEALL attribute requires non-empty list of targets" );
840
841 if (targets->ce_set == NIL(CELL)((CELL*)((void*)0))) {
842 for(
843 prev_cell=CeMeToo(targets)&((targets)->ce_all),tg1=targets->ce_link;
844 tg1 != NIL(CELL)((CELL*)((void*)0));
845 tg1=tg1->ce_link
846 ) {
847 if (tg1->ce_set)
848 Fatal( "Target [%s] appears on multiple .UPDATEALL lists",
849 tg1->CE_NAMEce_name->ht_name);
850 tg1->ce_set = targets;
851 TALLOC(prev_cell->cl_next, 1, LINK)if ((prev_cell->cl_next = (LINK*) calloc((unsigned int)(1)
, (size_t)sizeof(LINK))) == (LINK*)0) {No_ram();};
852 prev_cell = prev_cell->cl_next;
853 prev_cell->cl_prq = tg1;
854 }
855 targets->ce_set = targets;
856 }
857 else {
858 LINKPTR ap;
859 CELLPTR tp;
860
861 tp = targets;
862 ap = CeMeToo(targets)&((targets)->ce_all);
863 while (ap && tp && ap->cl_prq == tp && tp->ce_set == targets) {
864 ap = ap->cl_next;
865 tp = tp->ce_link;
866 }
867 if (ap || tp)
868 Fatal("Inconsistent .UPDATEALL lists for target [%s]",
869 targets->CE_NAMEce_name->ht_name);
870 }
871 targets->ce_link = NIL(CELL)((CELL*)((void*)0));
872 }
873
874 for( tg1 = targets; tg1 != NIL(CELL)((CELL*)((void*)0)); tg1 = tg1->ce_link ) {
875 /* Check if tg1 is already marked as a %-target, but not a magic
876 * (.xxx.yyy) target. */
877 int purepercent = (tg1->ce_flag & F_PERCENT0x0800) && !(tg1->ce_flag & F_MAGIC0x2000);
878
879 /* Check each target. Check for inconsistencies between :: and : rule
880 * sets. :: may follow either : or :: but not the reverse.
881 *
882 * Any F_MULTI target (contains :: rules) is represented by a prerequisite
883 * list hanging off the main target cell where each of the prerequisites
884 * is a copy of the target cell but is not entered into the hash table.
885 */
886 if( !(op & R_OP_DCL2 ) && (tg1->ce_flag & F_MULTI0x0002) && !purepercent )
887 Fatal( "':' vs '::' inconsistency in rules for %s", tg1->CE_NAMEce_name->ht_name );
888
889 if( purepercent ) {
890 /* Handle %-targets. */
891 CELLPTR cur;
892 CELLPTR tpq = NIL(CELL)((CELL*)((void*)0));
893 CELLPTR nprq = NULL((void*)0);
894
895#ifdef DBUG
896 DB_PRINT( "%", ("Handling %%-target [%s : : <prerequisites follow, maybe empty>]",
897 tg1->CE_NAME) );
898 for(cur=prereq;cur;cur=cur->ce_link) {
899 DB_PRINT( "%", (" %%-prerequisites : %s ",
900 cur->CE_NAME ? cur->CE_NAME : "<empty>") );
901 }
902#endif
903
904 /* Handle indirect (global) prerequisites first. */
905 for(cur=prereq;cur;cur=cur->ce_link) {
906 char *name = cur->CE_NAMEce_name->ht_name;
907 int len = strlen(name);
908
909 if( *name == '\'' && name[len-1]=='\'' ){
910 name[len-1] = '\0';
911 len = strlen(name+1)+1;
912 memmove(name,name+1,len);
913 /* add indirect prerequisite */
914 _add_indirect_prereq( cur );
915 }
916 else {
917 /* Sort all "other" prerequisits into tpq, with nprq
918 * pointing to the first element. */
919 if (tpq)
920 tpq->ce_link = cur;
921 else
922 nprq = cur;
923 tpq = cur;
924 }
925 }
926 /* Mark the last element of nprq. */
927 if(tpq)
928 tpq->ce_link=NIL(CELL)((CELL*)((void*)0));
929 else
930 nprq = NIL(CELL)((CELL*)((void*)0));
931
932 /* Handle "normal" prerequisites now. */
933
934 if ( op & R_OP_OR32 ) {
935 /* for op == ':|' transform:
936 * <%-target> :| <prereq_1> ... <prereq_n> ; <recipe>
937 * into:
938 * <%-target> : <prereq_1> ; <recipe>
939 * ..
940 * <%-target> : <prereq_n> ; <recipe>
941 */
942 for(tp1=nprq; tp1; tp1=tp1->ce_link) {
943 CELLPTR tmpcell = tp1->ce_link;
944 tp1->ce_link = NIL(CELL)((CELL*)((void*)0));
945 _build_graph(op,tg1,tp1);
946 tp1->ce_link = tmpcell;
947 }
948 }
949 else {
950 /* The inference mechanism for %-targets limits the number of
951 * (non-indirect) prerequisite to one, but an unlimited number
952 * of indirect prerequisites is possible. */
953 if ( nprq && nprq->ce_link && !(op & R_OP_OR32))
954 Warning("More than one prerequisite\n"
955 "for %%-target. Use :| ruleop or indirect prerequisites.");
956
957 _build_graph(op,tg1,nprq);
958 }
959 }
960 else if( tg1->ce_flag & F_MAGIC0x2000 &&
961 (p = _is_magic( tg1->CE_NAMEce_name->ht_name )) != NIL(char)((char*)((void*)0)) &&
962 _do_magic( op, p, tg1, prereq, attr, set_dir ) )
963 ; /* _do_magic() does all that is needed (if return value is TRUE). */
964 else if( op & R_OP_DCL2 ) { /* op == :: */
965 CELLPTR tmp_cell = _make_multi(tg1);
966
967 /* Add the F_MULTI master to .TARGETS (If not set already).
968 * Do this here so that the member cell is not added instead
969 * when the recipies are bound in Bind_rules_to_targets(). */
970 tflag |= _add_root(tg1);
971
972 /* Replace the F_MULTI master with the member cell. */
973 targets = _replace_cell( targets, tg1, tmp_cell );
974
975 /* We have to set (add) the attributes also for the F_MULTI master
976 * target cell. As there is no recipe the setdir value is not
977 * needed. _set_attributes() that follows in approx. 8 lines
978 * will set the attributes for the F_MULTI member cell. */
979 tg1->ce_attr |= (attr & ~A_SETDIR0x00400);
980
981 /* Now switch tg1 to the current (F_MULTI prereq.) target.
982 * All recipes have to be added to that cell and not to the
983 * F_MULTI master. */
984 tg1 = tmp_cell;
985 }
986
987 if( !purepercent ) _set_attributes( attr, set_dir, tg1 );
988
989 /* Build the proper prerequisite list of the target. If the `-',
990 * modifier was used clear the prerequisite list before adding any
991 * new prerequisites. Else add them to the head/tail as appropriate.
992 *
993 * If the target has F_PERCENT set then no prerequisites are used. */
994
995 if( !(tg1->ce_flag & F_PERCENT0x0800) ) {
996 if( op & R_OP_MI16 ) Clear_prerequisites( tg1 ); /* op == :- */
997
998 if( (op & R_OP_UP8) && (tg1->ce_prq != NIL(LINK)((LINK*)((void*)0))) ) /* op == :^ */
999 _stick_at_head( tg1, prereq );
1000 else for( tp1=prereq; tp1 != NIL(CELL)((CELL*)((void*)0)); tp1 = tp1->ce_link )
1001 Add_prerequisite( tg1, tp1, FALSE0, FALSE0 );
1002 }
1003 else if( op & (R_OP_MI16 | R_OP_UP8) )
1004 Warning( "Modifier(s) `^-' for %-meta target ignored" );
1005 }
1006
1007 /* In case a F_MULTI member that was the first prerequisite of .TARGETS */
1008 if(tflag)
1009 Target = TRUE1;
1010
1011 /* Check to see if we have NO targets but some attributes, i.e. an
1012 * Attribute-Definition. If so then apply all of the attributes to the
1013 * complete list of prerequisites. No recipes are allowed to follow. */
1014
1015 if( (targets == NIL(CELL)((CELL*)((void*)0))) && attr ) {
1016 ret_state = NORMAL_SCAN0;
1017 if( prereq != NIL(CELL)((CELL*)((void*)0)) )
1018 for( tp1=prereq; tp1 != NIL(CELL)((CELL*)((void*)0)); tp1 = tp1->ce_link )
1019 _set_attributes( attr, set_dir, tp1 );
1020 else
1021 _set_global_attr( attr );
1022 }
1023
1024 /* Now that we have built the lists of targets, the parser must parse the
1025 * recipes if there are any. However we must start the recipe list with the
1026 * recipe specified as via the ; kludge, if there is one */
1027 _sv_targets = targets;
1028 _sv_attr = attr;
1029 _sv_flag = ((op & R_OP_BG4) ? F_SINGLE0x0004 : F_DEFAULT0x0000);
1030
1031 DB_RETURN( ret_state )return (ret_state);
1032}
1033
1034
1035static int
1036_do_magic( op, dot, target, prereq, attr, set_dir )/*
1037=====================================================
1038 This function investigates dot for being a magic target of the form
1039 .<chars>.<chars> or .<chars> and creates the appropriate % rules for
1040 that target.
1041 If the target is given with an undefined syntax, i.e. with prerequisites,
1042 then this function terminates early without creating % rules and
1043 returns 0.
1044 If successful the function returns 1.
1045
1046 The function builds the % rule, `%.o : %.c' from .c.o, and
1047 `% : %.a' from .a */
1048
1049int op;
1050char *dot;
1051CELLPTR target;
1052CELLPTR prereq;
1053t_attr attr;
1054char *set_dir;
1055{
1056 CELLPTR tg;
1057 CELLPTR prq;
1058 char *tmp, *tmp2;
1059
1060 DB_ENTER( "_do_magic" );
1061
1062 DB_PRINT("%", ("Analysing magic target [%s]", target->CE_NAME));
1063
1064 if( prereq != NIL(CELL)((CELL*)((void*)0)) ) {
1065 Warning( "Ignoring AUGMAKE meta-target [%s] because prerequisites are present.", target->CE_NAMEce_name->ht_name );
1066 DB_RETURN(0)return (0);
1067 }
1068
1069 if( dot == target->CE_NAMEce_name->ht_name ) { /* its of the form .a */
1070 tg = Def_cell( "%" );
1071 tmp = _build_meta( target->CE_NAMEce_name->ht_name );
1072 prq = Def_cell( tmp );
1073 FREE( tmp )free((char*)(tmp));
1074
1075 _build_graph( op, tg, prq );
1076 }
1077 else {
1078 tmp = _build_meta( dot );
1079 tg = Def_cell( tmp );
1080 FREE( tmp )free((char*)(tmp));
1081
1082 tmp = _build_meta( tmp2 = DmSubStr( target->CE_NAMEce_name->ht_name, dot ) );
1083 prq = Def_cell( tmp );
1084 FREE( tmp )free((char*)(tmp));
1085 FREE( tmp2 )free((char*)(tmp2));
1086
1087 _build_graph( op, tg, prq );
1088 }
1089
1090 tg->ce_flag |= F_PERCENT0x0800;
1091 target->ce_flag |= (F_MAGIC0x2000|F_PERCENT0x0800);
1092
1093 _set_attributes( attr, set_dir, tg );
1094
1095 DB_RETURN(1)return (1);
1096}
1097
1098
1099static CELLPTR
1100_replace_cell( lst, cell, rep )/*
1101=================================
1102 Replace cell with rep in lst. Note if cell is not part of lst we are in
1103 real trouble. */
1104CELLPTR lst;
1105CELLPTR cell;
1106CELLPTR rep;
1107{
1108 register CELLPTR tp;
1109
1110 if( lst == cell ) {
1111 rep->ce_link = lst->ce_link;
1112 lst = rep;
1113 }
1114 else {
1115 for( tp=lst; tp->ce_link != cell && tp ; tp=tp->ce_link );
1116 if( !tp )
1117 Fatal( "Internal Error: cell not part of lst." );
1118 rep->ce_link = tp->ce_link->ce_link;
1119 tp->ce_link = rep;
1120 }
1121
1122 return(lst);
1123}
1124
1125
1126static char *
1127_build_meta( name )/*
1128=====================
1129 Check to see if the name is of the form .c~ if so and if Augmake
1130 translation is enabled then return s.%.c, else return %.suff, where if the
1131 suffix ends in '~' then leave it be.*/
1132char *name;
1133{
1134 char *tmp;
1135 int test = (STOBOOL(Augmake)(Augmake && ((*Augmake | 0x20) == 'y')) ? name[strlen(name)-1] == '~' : 0);
1136
1137 tmp = DmStrJoin( test ? "s.%" : "%", name, -1, FALSE0);
1138 if( test ) tmp[ strlen(tmp)-1 ] = '\0';
1139
1140 return(tmp);
1141}
1142
1143
1144static CELLPTR
1145_build_graph( op, target, prereq )/*
1146====================================
1147 This function is called to build the graph for the % rule given by
1148 target : prereq cell combination. This function assumes that target
1149 is a % target and that prereq is one or multiple non-indirect prerequisite.
1150 It also assumes that target cell has F_PERCENT set already.
1151
1152 NOTE: If more than one prerequisite is present this function handles them
1153 correctly but the lookup still only uses the first (BUG!).
1154
1155 R_OP_CL (:) rules replace existing rules if any, %.o :: %.c is meaningless.
1156
1157 The function always returns NIL(CELL). */
1158int op;
1159CELLPTR target;
1160CELLPTR prereq;
1161{
1162 LINKPTR edl;
1163 CELLPTR edge = 0;
1164 CELLPTR tpq,cur;
1165 int match;
1166
1167#ifdef DBUG
1168 DB_ENTER( "_build_graph" );
1169 DB_PRINT( "%", ("Building graph for [%s : <prerequisites follow, maybe empty>]",
1170 target->CE_NAME) );
1171 for(tpq=prereq;tpq;tpq=tpq->ce_link) {
1172 DB_PRINT( "%", (" %%-prerequisites : %s ",
1173 tpq->CE_NAME ? tpq->CE_NAME : "<empty>") );
1174 }
1175#endif
1176
1177 /* Currently multiple prerequisites are not (yet) handled correctly.
1178 * We already issue a warning in _do_targets(), don't issue it here
1179 * again.
1180 if ( prereq && prereq->ce_link )
1181 Warning( "Internal Error: more than one prerequisite in _build_graph." );
1182 */
1183
1184 /* There cannot be more than one target name ( linked with
1185 * (CeMeToo(target))->cl_next ) per %-target master.
1186 * FIXME: remove this check after verifying that it never triggers. */
1187 if ( (CeMeToo(target)&((target)->ce_all))->cl_next )
1188 Fatal( "Internal Error: more than one target name in _build_graph." );
1189
1190 /* Search the list of prerequisites for the current target and see if
1191 * any of them match the current %-meta's : prereq's pair. NOTE that
1192 * %-metas are built as if they were F_MULTI targets, i.e. the target
1193 * definitions for the %-target members are stored in the prerequisites
1194 * list of the master target. */
1195 /* This relies on target->ce_prq being NULL if this is the first
1196 * occurrence of this %-target and therefore not yet having a %-target
1197 * master. */
1198 match = FALSE0;
1199 for(edl=target->ce_prq; !match && edl != NIL(LINK)((LINK*)((void*)0)); edl=edl->cl_next) {
1200 LINKPTR l1,l2;
1201 edge = edl->cl_prq;
1202
1203 DB_PRINT("%", ("Trying to match [%s]",edge?edge->CE_NAME:"(nil)"));
1204
1205 /* First we match the target sets, if this fails then we don't have to
1206 * bother with the prerequisite sets. The targets sets are sorted.
1207 * this makes life very simple. */
1208 /* ce_dir is handled per member target, no check needed for the
1209 * master target. */
1210
1211 /* FIXME: We already checked above that there is only one target
1212 * name. Remove the comparisons for following names. */
1213 l1 = CeMeToo(target)&((target)->ce_all); /* Used by .UPDATEALL !!! */
1214 l2 = CeMeToo(edge)&((edge)->ce_all);
1215 while(l1 && l2 && l1->cl_prq == l2->cl_prq) {
1216 l1=l1->cl_next;
1217 l2=l2->cl_next;
1218 }
1219 /* If both l1 and l2 are NULL we had a match. */
1220 if (l1 || l2)
1221 continue;
1222
1223 /* target sets match, so check prerequisites. */
1224 if( (!edge->ce_prq && !prereq) /* matches both empty - separate this. */
1225 || ( edge->ce_prq
1226 && ( edge->ce_dir == _sv_setdir
1227 || ( edge->ce_dir
1228 && _sv_setdir
1229 && !strcmp(edge->ce_dir,strchr(_sv_setdir,'=')+1)
1230 )
1231 )
1232 )
1233 ) {
1234 LINKPTR prql;
1235
1236 /* this is a really gross way to compare two sets, it's n^2 but
1237 * since the sets are assumed to always be tiny, it should be ok. */
1238 for(tpq=prereq; tpq; tpq=tpq->ce_link) {
1239 for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1240 if (prql->cl_prq == tpq)
1241 break;
1242
1243 if(prql == NIL(LINK)((LINK*)((void*)0)))
1244 break;
1245
1246 prql->cl_prq->ce_flag |= F_MARK0x0001;
1247 }
1248
1249 if (tpq == NIL(CELL)((CELL*)((void*)0))) {
1250 for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1251 if(!(prql->cl_prq->ce_flag & F_MARK0x0001))
1252 break;
1253
1254 if(prql == NIL(LINK)((LINK*)((void*)0)))
1255 match = TRUE1;
1256 }
1257
1258 /* clean up the mark bits. */
1259 for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1260 prql->cl_prq->ce_flag &= ~F_MARK0x0001;
1261 }
1262 }
1263
1264 if( match ) {
1265 /* match is TRUE hence, we found an edge joining the target and the
1266 * prerequisite so reset the new edge so that new values replace it. */
1267 DB_PRINT( "%", ("It's an old edge") );
1268
1269 edge->ce_dir = NIL(char)((char*)((void*)0));
1270 edge->ce_flag &= (F_PERCENT0x0800|F_MAGIC0x2000|F_DFA0x0200);
1271 edge->ce_attr &= A_NOINFER0x00080;
1272 }
1273 else {
1274 DB_PRINT( "%", ("Adding a new edge") );
1275
1276 edge = _make_multi(target);
1277
1278 /* FIXME: There can be only one %-target. */
1279 for(edl=CeMeToo(target)&((target)->ce_all);edl;edl=edl->cl_next) {
1280 if( !((tpq=edl->cl_prq)->ce_flag & F_DFA0x0200) ) {
1281 Add_nfa( tpq->CE_NAMEce_name->ht_name );
1282 tpq->ce_flag |= F_DFA0x0200;
1283 }
1284
1285 edl->cl_prq->ce_set = edge;
1286 }
1287
1288 edge->ce_all = target->ce_all;
1289 target->ce_all.cl_next = NIL(LINK)((LINK*)((void*)0));
1290 target->ce_set = NIL(CELL)((CELL*)((void*)0));
1291
1292 /* Add all prerequisites to edge. */
1293 for(tpq=prereq; tpq; tpq=tpq->ce_link)
1294 Add_prerequisite(edge, tpq, FALSE0, TRUE1);
1295 }
1296
1297 if( op & R_OP_DCL2 )
1298 Warning("'::' operator for meta-target '%s' ignored, ':' operator assumed.",
1299 target->CE_NAMEce_name->ht_name );
1300
1301 /* If edge was already added we're in BIG trouble. */
1302 /* Re-use cur as temporary variable. */
1303 for( cur=_sv_edgel; cur != NIL(CELL)((CELL*)((void*)0)); cur=cur->ce_link ) {
1304 if( cur == edge )
1305 Fatal( "Internal Error: edge already in _sv_edgel." );
1306 }
1307
1308 edge->ce_link = _sv_edgel;
1309 _sv_edgel = edge;
1310 _sv_globprq_only = 0;
1311
1312 DB_RETURN(NIL(CELL))return (((CELL*)((void*)0)));
1313}
1314
1315
1316static CELLPTR
1317_make_multi( tg )/*
1318===================
1319 This function is called to convert tg into an F_MULTI target.
1320 Return a pointer to the new member cell.
1321 I don't know what the author intended but the ce_index entry is only
1322 used in this function (set to 0 for added targets) and undefined otherwise!
1323 The undefined value is hopefully set to 0 by the C compiler as each added
1324 target sets its ce_count to ++ce_index (==1). (FIXME) */
1325CELLPTR tg;
1326{
1327 CELLPTR cp;
1328
1329 /* This creates a new master F_MULTI target if tg existed before as a normal
1330 * target with prerequisites or recipes. */
1331 if( !(tg->ce_flag & F_MULTI0x0002) && (tg->ce_prq || tg->ce_recipe) ) {
1332 /* Allocate a new master cell. */
1333 TALLOC(cp, 1, CELL)if ((cp = (CELL*) calloc((unsigned int)(1), (size_t)sizeof(CELL
))) == (CELL*)0) {No_ram();};
1
Within the expansion of the macro 'TALLOC':
→
a
Value assigned to 'cp'
b
Assuming pointer value is null
1334 *cp = *tg;
2
←
Dereference of null pointer (loaded from variable 'cp')
1335
1336 /* F_MULTI master */
1337 tg->ce_prq = NIL(LINK)((LINK*)((void*)0));
1338 tg->ce_flag |= F_RULES0x0010|F_MULTI0x0002|F_TARGET0x0008;
1339 tg->ce_attr |= A_SEQ0x00200;
1340 tg->ce_recipe = NIL(STRING)((STRING*)((void*)0));
1341 tg->ce_dir = NIL(char)((char*)((void*)0));
1342
1343 /* F_MULTI member for preexisting elements */
1344 cp->ce_count = ++tg->ce_index;
1345 cp->ce_cond = NIL(STRING)((STRING*)((void*)0));
1346 cp->ce_set = NIL(CELL)((CELL*)((void*)0));
1347 cp->ce_all.cl_prq = cp;
1348 CeNotMe(cp)(cp)->ce_all.cl_next = NIL(LINK)((LINK*)((void*)0));
1349
1350 Add_prerequisite(tg, cp, FALSE0, TRUE1);
1351 }
1352
1353 /* Alocate memory for new member of F_MULTI target */
1354 TALLOC(cp, 1, CELL)if ((cp = (CELL*) calloc((unsigned int)(1), (size_t)sizeof(CELL
))) == (CELL*)0) {No_ram();};
1355 *cp = *tg;
1356
1357 /* This is reached if the target already exists, but without having
1358 * prerequisites or recepies. Morph it into a F_MULTI master cell. */
1359 if( !(tg->ce_flag & F_MULTI0x0002) ) {
1360 tg->ce_prq = NIL(LINK)((LINK*)((void*)0));
1361 tg->ce_flag |= F_RULES0x0010|F_MULTI0x0002|F_TARGET0x0008;
1362 tg->ce_attr |= A_SEQ0x00200;
1363 tg->ce_recipe = NIL(STRING)((STRING*)((void*)0));
1364 tg->ce_dir = NIL(char)((char*)((void*)0));
1365 cp->ce_cond = NIL(STRING)((STRING*)((void*)0));
1366 }
1367 /* This handles the case of adding an additional target as a
1368 * prerequisite to a F_MULTI target. */
1369 else {
1370 cp->ce_flag &= ~(F_RULES0x0010|F_MULTI0x0002);
1371 cp->ce_attr &= ~A_SEQ0x00200;
1372 cp->ce_prq = NIL(LINK)((LINK*)((void*)0));
1373 cp->ce_index = 0;
1374 cp->ce_cond = NIL(STRING)((STRING*)((void*)0));
1375 }
1376 cp->ce_count = ++tg->ce_index;
1377 cp->ce_flag |= F_TARGET0x0008;
1378 cp->ce_set = NIL(CELL)((CELL*)((void*)0));
1379 cp->ce_all.cl_prq = cp;
1380 CeNotMe(cp)(cp)->ce_all.cl_next = NIL(LINK)((LINK*)((void*)0));
1381
1382 Add_prerequisite(tg, cp, FALSE0, TRUE1);
1383 return(cp);
1384}
1385
1386
1387static void
1388_add_indirect_prereq( pq )/*
1389==========================
1390 Prerequisite is an indirect prerequisite for a %-target, add it to
1391 the target's list of indirect prerequsites to add on match. */
1392CELLPTR pq;
1393{
1394 register LINKPTR ln;
1395
1396 /* Only add to list of indirect prerequsites if it is not in already. */
1397 for(ln=_sv_ind_prq; ln; ln=ln->cl_next)
1398 if(strcmp(ln->cl_prq->CE_NAMEce_name->ht_name,pq->CE_NAMEce_name->ht_name) == 0)
1399 return;
1400
1401 /* Not in, add it. */
1402 TALLOC( ln, 1, LINK )if ((ln = (LINK*) calloc((unsigned int)(1), (size_t)sizeof(LINK
))) == (LINK*)0) {No_ram();};
1403 ln->cl_next = _sv_ind_prq;
1404 ln->cl_prq = pq;
1405 _sv_ind_prq = ln;
1406}
1407
1408
1409
1410static void
1411_set_attributes( attr, set_dir, cp )/*
1412======================================
1413 Set the appropriate attributes for a cell */
1414t_attr attr;
1415char *set_dir;
1416CELLPTR cp;
1417{
1418 char *dir = 0;
1419
1420 DB_ENTER( "_set_attributes" );
1421
1422 /* If .SETDIR attribute is set then we have at least .SETDIR= in the
1423 * set_dir string. So go and fishout what is at the end of the =.
1424 * If not set and not NULL then propagate it to the target cell. */
1425
1426 if( attr & A_SETDIR0x00400 ) {
1427 char *p;
1428 if( (p = strchr( set_dir, '=' )) != NULL((void*)0) )
1429 dir = p + 1;
1430
1431 if( cp->ce_dir )
1432 Warning( "Multiple .SETDIR for %s ignored", cp->CE_NAMEce_name->ht_name );
1433 else if( *dir )
1434 cp->ce_dir = DmStrDup(dir);
1435 }
1436 cp->ce_attr |= attr; /* set rest of attributes for target */
1437
1438 DB_VOID_RETURNreturn;
1439}
1440
1441
1442
1443static void
1444_set_global_attr( attr )/*
1445==========================
1446 Handle the setting of the global attribute functions based on
1447 The attribute flags set in attr. */
1448t_attr attr;
1449{
1450 t_attr flag;
1451
1452 /* Some compilers can't handle a switch on a long, and t_attr is now a long
1453 * integer on some systems. foey! */
1454 for( flag = MAX_ATTR0x40000; flag; flag >>= 1 )
1455 if( flag & attr ) {
1456 if( flag == A_PRECIOUS0x00001) Def_macro(".PRECIOUS", "y", M_EXPANDED0x0008);
1457 else if( flag == A_SILENT0x00002) Def_macro(".SILENT", "y", M_EXPANDED0x0008);
1458 else if( flag == A_IGNORE0x00020 ) Def_macro(".IGNORE", "y", M_EXPANDED0x0008);
1459 else if( flag == A_EPILOG0x00008 ) Def_macro(".EPILOG", "y", M_EXPANDED0x0008);
1460 else if( flag == A_PROLOG0x00010 ) Def_macro(".PROLOG", "y", M_EXPANDED0x0008);
1461 else if( flag == A_NOINFER0x00080 ) Def_macro(".NOINFER", "y", M_EXPANDED0x0008);
1462 else if( flag == A_SEQ0x00200 ) Def_macro(".SEQUENTIAL","y", M_EXPANDED0x0008);
1463 else if( flag == A_SHELL0x00800 ) Def_macro(".USESHELL", "y", M_EXPANDED0x0008);
1464 else if( flag == A_MKSARGS0x02000 ) Def_macro(".MKSARGS", "y", M_EXPANDED0x0008);
1465#if !defined(__CYGWIN__)
1466 else if( flag == A_SWAP0x01000 ) Def_macro(".SWAP", "y", M_EXPANDED0x0008);
1467#else
1468 else if( flag == A_WINPATH0x01000 ) Def_macro(".WINPATH", "y", M_EXPANDED0x0008);
1469#endif
1470 }
1471
1472 attr &= ~A_GLOB(0x00001 | 0x00002 | 0x00020 | 0x00008 | 0x01000 | 0x00800 | 0x00010
| 0x00080 | 0x00200 | 0x02000 );
1473 if( attr ) Warning( "Non global attribute(s) ignored" );
1474}
1475
1476
1477
1478static void
1479_stick_at_head( cp, pq )/*
1480==========================
1481 Add the prerequisite list to the head of the existing prerequisite
1482 list */
1483
1484CELLPTR cp; /* cell for target node */
1485CELLPTR pq; /* list of prerequisites to add */
1486{
1487 DB_ENTER( "_stick_at_head" );
1488
1489 if( pq->ce_link != NIL(CELL)((CELL*)((void*)0)) ) _stick_at_head( cp, pq->ce_link );
1490 Add_prerequisite( cp, pq, TRUE1, FALSE0 );
1491
1492 DB_VOID_RETURNreturn;
1493}
1494
1495
1496
1497static t_attr
1498_is_attribute( name )/*
1499=======================
1500 Check the passed name against the list of valid attributes and return the
1501 attribute index if it is, else return 0, indicating the name is not a valid
1502 attribute. The present attributes are defined in dmake.h as A_xxx #defines,
1503 with the corresponding makefile specification: (note they must be named
1504 exactly as defined below)
1505
1506 Valid attributes are: .IGNORE, .SETDIR=, .SILENT, .PRECIOUS, .LIBRARY,
1507 .EPILOG, .PROLOG, .LIBRARYM, .SYMBOL, .UPDATEALL,
1508 .USESHELL, .NOINFER, .PHONY, .SWAP/.WINPATH, .SEQUENTIAL
1509 .NOSTATE, .MKSARGS, .IGNOREGROUP, .GROUP, .FIRST
1510 .EXECUTE, .ERRREMOVE
1511
1512 NOTE: The strcmp's are OK since at most three are ever executed for any
1513 one attribute check, and that happens only when we can be fairly
1514 certain we have an attribute. */
1515char *name;
1516{
1517 t_attr attr = 0;
1518
1519 DB_ENTER( "_is_attribute" );
1520
1521 if( *name++ == '.' )
1522 switch( *name )
1523 {
1524 case 'E':
1525 if( !strcmp(name, "EPILOG") ) attr = A_EPILOG0x00008;
1526 else if( !strcmp(name, "EXECUTE")) attr = A_EXECUTE0x20000;
1527 else if( !strcmp(name, "ERRREMOVE")) attr = A_ERRREMOVE0x40000;
1528 else attr = 0;
1529 break;
1530
1531 /* A_FIRST implies A_IGNORE, handled in ST_INCLUDE */
1532 case 'F':
1533 attr = (strcmp(name, "FIRST")) ? 0 : A_FIRST0x20000000;
1534 break;
1535
1536 case 'G': attr = (strcmp(name, "GROUP")) ? 0 : A_GROUP0x02000000; break;
1537 case 'L': attr = (strcmp(name, "LIBRARY")) ? 0 : A_LIBRARY0x00004; break;
1538 case 'M': attr = (strcmp(name, "MKSARGS")) ? 0 : A_MKSARGS0x02000; break;
1539
1540 case 'I':
1541 if( !strcmp(name, "IGNORE") ) attr = A_IGNORE0x00020;
1542 else if( !strcmp(name, "IGNOREGROUP")) attr = A_IGNOREGROUP0x10000;
1543 else attr = 0;
1544 break;
1545
1546 case 'N':
1547 if( !strcmp(name, "NOINFER") ) attr = A_NOINFER0x00080;
1548 else if( !strcmp(name, "NOSTATE")) attr = A_NOSTATE0x08000;
1549 else attr = 0;
1550 break;
1551
1552 case 'U':
1553 if( !strcmp(name, "UPDATEALL") ) attr = A_UPDATEALL0x00100;
1554 else if( !strcmp(name, "USESHELL")) attr = A_SHELL0x00800;
1555 else attr = 0;
1556 break;
1557
1558 case 'P':
1559 if( !strcmp(name, "PRECIOUS") ) attr = A_PRECIOUS0x00001;
1560 else if( !strcmp(name, "PROLOG") ) attr = A_PROLOG0x00010;
1561 else if( !strcmp(name, "PHONY") ) attr = A_PHONY0x04000;
1562 else attr = 0;
1563 break;
1564
1565 case 'S':
1566 if( !strncmp(name, "SETDIR=", 7) ) attr = A_SETDIR0x00400;
1567 else if( !strcmp(name, "SILENT") ) attr = A_SILENT0x00002;
1568 else if( !strcmp(name, "SYMBOL") ) attr = A_SYMBOL0x00040;
1569 else if( !strcmp(name, "SEQUENTIAL")) attr = A_SEQ0x00200;
1570 /* A_SWAP has no meaning except for MSDOS. */
1571 else if( !strcmp(name, "SWAP")) attr = A_SWAP0x01000;
1572 else attr = 0;
1573 break;
1574
1575 case 'W': attr = (strcmp(name, "WINPATH")) ? 0 : A_WINPATH0x01000; break;
1576 }
1577
1578 DB_RETURN( attr )return (attr);
1579}
1580
1581
1582
1583static int
1584_is_special( tg )/*
1585===================
1586 This function returns TRUE if the name passed in represents a special
1587 target, otherwise it returns false. A special target is one that has
1588 a special meaning to dmake, and may require processing at the time that
1589 it is parsed.
1590
1591 Current Special targets are:
1592 .GROUPPROLOG .GROUPEPILOG .INCLUDE .IMPORT
1593 .EXPORT .SOURCE .SUFFIXES .ERROR .EXIT
1594 .INCLUDEDIRS .MAKEFILES .REMOVE .KEEP_STATE
1595 .TARGETS .ROOT
1596*/
1597char *tg;
1598{
1599 DB_ENTER( "_is_special" );
1600
1601 if( *tg++ != '.' ) DB_RETURN( 0 )return (0);
1602
1603 switch( *tg )
1604 {
1605 case 'E':
1606 if( !strcmp( tg, "ERROR" ) ) DB_RETURN( ST_REST )return (4);
1607 else if( !strcmp( tg, "EXPORT" ) ) DB_RETURN( ST_EXPORT )return (8);
1608 else if( !strcmp( tg, "EXIT" ) ) DB_RETURN( ST_EXIT )return (12);
1609 break;
1610
1611 case 'G':
1612 if( !strcmp( tg, "GROUPPROLOG" )) DB_RETURN( ST_REST )return (4);
1613 else if( !strcmp( tg, "GROUPEPILOG" )) DB_RETURN( ST_REST )return (4);
1614 break;
1615
1616 case 'I':
1617 if( !strcmp( tg, "IMPORT" ) ) DB_RETURN( ST_IMPORT )return (9);
1618 else if( !strcmp( tg, "INCLUDE" ) ) DB_RETURN( ST_INCLUDE )return (5);
1619 else if( !strcmp( tg, "INCLUDEDIRS" )) DB_RETURN( ST_REST )return (4);
1620 break;
1621
1622 case 'K':
1623 if( !strcmp( tg, "KEEP_STATE" ) ) DB_RETURN( ST_KEEP )return (11);
1624 break;
1625
1626 case 'M':
1627 if( !strcmp( tg, "MAKEFILES" ) ) DB_RETURN( ST_REST )return (4);
1628 break;
1629
1630 case 'R':
1631 if( !strcmp( tg, "REMOVE" ) ) DB_RETURN( ST_REST )return (4);
1632 else if( !strcmp( tg, "ROOT" ) ) DB_RETURN( ST_REST )return (4);
1633 break;
1634
1635 case 'S':
1636 if( !strncmp( tg, "SOURCE", 6 ) ) DB_RETURN( ST_SOURCE )return (7);
1637 else if( !strncmp(tg, "SUFFIXES", 8 )) {
1638 if (Verbose & V_WARNALL0x40)
1639 Warning( "The .SUFFIXES target has no special meaning and is deprecated." );
1640 DB_RETURN( ST_SOURCE )return (7);
1641 }
1642 break;
1643
1644 case 'T':
1645 if( !strcmp( tg, "TARGETS" ) ) DB_RETURN( ST_REST )return (4);
1646 break;
1647 }
1648
1649 DB_RETURN( 0 )return (0);
1650}
1651
1652
1653
1654static int
1655_is_percent( np )/*
1656===================
1657 return TRUE if np points at a string containing a % sign */
1658char *np;
1659{
1660 return( (strchr(np,'%') && (*np != '\'' && np[strlen(np)-1] != '\'')) ?
1661 TRUE1 : FALSE0 );
1662}
1663
1664
1665static char *
1666_is_magic( np )/*
1667=================
1668 return NULL if np does not points at a string of the form
1669 .<chars>.<chars> or .<chars>
1670 where chars are "visible characters" for the current locale. If np is of the
1671 first form we return a pointer to the second '.' and for the second form we
1672 return a pointer to the '.'.
1673
1674 NOTE: reject target if it contains / or begins with ..
1675 reject also .INIT and .DONE because they are mentioned in the
1676 man page. */
1677char *np;
1678{
1679 register char *n;
1680
1681 n = np;
1682 if( *n != '.' ) return( NIL(char)((char*)((void*)0)) );
1683 if (strchr(DirBrkStr, *(n+1))!=NULL((void*)0) || *(n+1) == '.' )
1684 return (NIL(char)((char*)((void*)0)));
1685 if( !strcmp( n+1, "INIT" ) || !strcmp( n+1, "DONE" ) )
1686 return (NIL(char)((char*)((void*)0)));
1687
1688 for( n++; isgraph(*n)((*__ctype_b_loc ())[(int) ((*n))] & (unsigned short int)
_ISgraph) && (*n != '.'); n++ );
1689
1690 if( *n != '\0' ) {
1691 if( *n != '.' ) return( NIL(char)((char*)((void*)0)) );
1692 for( np = n++; isgraph( *n )((*__ctype_b_loc ())[(int) ((*n))] & (unsigned short int)
_ISgraph) && (*n != '.'); n++ );
1693 if( *n != '\0' ) return( NIL(char)((char*)((void*)0)) );
1694 }
1695 /* Until dmake 4.5 a .<suffix> target was ignored when AUGMAKE was
1696 * set and evaluated as a meta target if unset (also for -A).
1697 * To keep maximum compatibility accept this regardles of the AUGMAKE
1698 * status. */
1699
1700 /* np points at the second . of .<chars>.<chars> string.
1701 * if the special target is of the form .<chars> then np points at the
1702 * first . in the token. */
1703
1704 return( np );
1705}
1706
1707
1708static int
1709_add_root(tg)/*
1710===============
1711 Adds "tg" to the prerequisits list of "Targets" if "Target" is not TRUE,
1712 i.e. to the list of targets that are to be build.
1713 Instead io setting "Target" to TRUE, TRUE is returned as more targets
1714 might be defined in the current makefile line and they all have to be
1715 add to "Targets" in this case. */
1716
1717CELLPTR tg;
1718{
1719 int res = FALSE0;
1720
1721 if(tg == Targets)
1722 return(TRUE1);
1723
1724 if( !Target && !(tg->ce_flag & (F_SPECIAL0x0100|F_PERCENT0x0800)) ) {
1725 Add_prerequisite(Targets, tg, FALSE0, TRUE1);
1726
1727 tg->ce_flag |= F_TARGET0x0008;
1728 tg->ce_attr |= A_FRINGE0x100000;
1729 res = TRUE1;
1730 }
1731
1732 return(res);
1733}