parse.c@ 64

Last change on this file since 64 was 51, checked in by bird, 22 years ago
kMk and porting to kLib.
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1	/*
2	* Copyright (c) 1988, 1989, 1990, 1993
3	* The Regents of the University of California. All rights reserved.
4	* Copyright (c) 1989 by Berkeley Softworks
5	* All rights reserved.
6	*
7	* This code is derived from software contributed to Berkeley by
8	* Adam de Boor.
9	*
10	* Redistribution and use in source and binary forms, with or without
11	* modification, are permitted provided that the following conditions
12	* are met:
13	* 1. Redistributions of source code must retain the above copyright
14	* notice, this list of conditions and the following disclaimer.
15	* 2. Redistributions in binary form must reproduce the above copyright
16	* notice, this list of conditions and the following disclaimer in the
17	* documentation and/or other materials provided with the distribution.
18	* 3. All advertising materials mentioning features or use of this software
19	* must display the following acknowledgement:
20	* This product includes software developed by the University of
21	* California, Berkeley and its contributors.
22	* 4. Neither the name of the University nor the names of its contributors
23	* may be used to endorse or promote products derived from this software
24	* without specific prior written permission.
25	*
26	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36	* SUCH DAMAGE.
37	*/
38
39	#ifndef lint
40	#if 0
41	static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94";
42	#else
43	static const char rcsid[] =
44	"$FreeBSD: src/usr.bin/make/parse.c,v 1.22 1999/08/28 01:03:35 peter Exp $";
45	#endif
46	#define KLIBFILEDEF rcsid
47	#endif /* not lint */
48
49	/*-
50	* parse.c --
51	* Functions to parse a makefile.
52	*
53	* One function, Parse_Init, must be called before any functions
54	* in this module are used. After that, the function Parse_File is the
55	* main entry point and controls most of the other functions in this
56	* module.
57	*
58	* Most important structures are kept in Lsts. Directories for
59	* the #include "..." function are kept in the 'parseIncPath' Lst, while
60	* those for the #include <...> are kept in the 'sysIncPath' Lst. The
61	* targets currently being defined are kept in the 'targets' Lst.
62	*
63	* The variables 'fname' and 'lineno' are used to track the name
64	* of the current file and the line number in that file so that error
65	* messages can be more meaningful.
66	*
67	* Interface:
68	* Parse_Init Initialization function which must be
69	* called before anything else in this module
70	* is used.
71	*
72	* Parse_End Cleanup the module
73	*
74	* Parse_File Function used to parse a makefile. It must
75	* be given the name of the file, which should
76	* already have been opened, and a function
77	* to call to read a character from the file.
78	*
79	* Parse_IsVar Returns TRUE if the given line is a
80	* variable assignment. Used by MainParseArgs
81	* to determine if an argument is a target
82	* or a variable assignment. Used internally
83	* for pretty much the same thing...
84	*
85	* Parse_Error Function called when an error occurs in
86	* parsing. Used by the variable and
87	* conditional modules.
88	* Parse_MainName Returns a Lst of the main target to create.
89	*/
90
91	#ifdef __STDC__
92	#include <stdarg.h>
93	#else
94	#include <varargs.h>
95	#endif
96	#include <ctype.h>
97	#include <err.h>
98	#include <stdio.h>
99	#include "make.h"
100	#include "hash.h"
101	#include "dir.h"
102	#include "job.h"
103	#include "buf.h"
104	#include "pathnames.h"
105
106
107	/*
108	* These values are returned by ParseEOF to tell Parse_File whether to
109	* CONTINUE parsing, i.e. it had only reached the end of an include file,
110	* or if it's DONE.
111	*/
112	#define CONTINUE 1
113	#define DONE 0
114	static Lst targets; /* targets we're working on */
115	/static Lst targCmds; / /* command lines for targets */
116	static Boolean inLine; /* true if currently in a dependency
117	* line or its commands */
118	#if defined(USE_INLINEFILES)
119	static Boolean inInlineFile; /* true if currently in a inline file.*/
120	#endif
121	typedef struct {
122	char *str;
123	char *ptr;
124	} PTR;
125
126	static char fname; / name of current file (for errors) */
127	static int lineno; /* line number in current file */
128	static FILE curFILE = NULL; / current makefile */
129
130	static PTR curPTR = NULL; / current makefile */
131
132	static int fatals = 0;
133
134	static GNode mainNode; / The main target to create. This is the
135	* first target on the first dependency
136	* line in the first makefile */
137	/*
138	* Definitions for handling #include specifications
139	*/
140	typedef struct IFile {
141	char fname; / name of previous file */
142	int lineno; /* saved line number */
143	FILE * F; /* the open stream */
144	PTR * p; /* the char pointer */
145	} IFile;
146
147	static Lst includes; /* stack of IFiles generated by
148	* #includes */
149	Lst parseIncPath; /* list of directories for "..." includes */
150	Lst sysIncPath; /* list of directories for <...> includes */
151
152	/*-
153	* specType contains the SPECial TYPE of the current target. It is
154	* Not if the target is unspecial. If it is special, however, the children
155	* are linked as children of the parent but not vice versa. This variable is
156	* set in ParseDoDependency
157	*/
158	typedef enum {
159	Begin, /* .BEGIN */
160	Default, /* .DEFAULT */
161	End, /* .END */
162	Ignore, /* .IGNORE */
163	Includes, /* .INCLUDES */
164	Interrupt, /* .INTERRUPT */
165	#ifdef USE_ARCHIVES
166	Libs, /* .LIBS */
167	#endif
168	MFlags, /* .MFLAGS or .MAKEFLAGS */
169	Main, /* .MAIN and we don't have anything user-specified to
170	* make */
171	NoExport, /* .NOEXPORT */
172	Not, /* Not special */
173	NotParallel, /* .NOTPARALELL */
174	Null, /* .NULL */
175	Order, /* .ORDER */
176	Parallel, /* .PARALLEL */
177	ExPath, /* .PATH */
178	Phony, /* .PHONY */
179	#ifdef POSIX
180	Posix, /* .POSIX */
181	#endif
182	Precious, /* .PRECIOUS */
183	ExShell, /* .SHELL */
184	Silent, /* .SILENT */
185	SingleShell, /* .SINGLESHELL */
186	Suffixes, /* .SUFFIXES */
187	Wait, /* .WAIT */
188	Attribute /* Generic attribute */
189	} ParseSpecial;
190
191	static ParseSpecial specType;
192	static int waiting;
193
194	/*
195	* Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER
196	* seen, then set to each successive source on the line.
197	*/
198	static GNode *predecessor;
199
200	/*
201	* The parseKeywords table is searched using binary search when deciding
202	* if a target or source is special. The 'spec' field is the ParseSpecial
203	* type of the keyword ("Not" if the keyword isn't special as a target) while
204	* the 'op' field is the operator to apply to the list of targets if the
205	* keyword is used as a source ("0" if the keyword isn't special as a source)
206	*/
207	static struct {
208	char name; / Name of keyword */
209	ParseSpecial spec; /* Type when used as a target */
210	int op; /* Operator when used as a source */
211	} parseKeywords[] = {
212	{ ".BEGIN", Begin, 0 },
213	{ ".DEFAULT", Default, 0 },
214	{ ".END", End, 0 },
215	{ ".EXEC", Attribute, OP_EXEC },
216	{ ".IGNORE", Ignore, OP_IGNORE },
217	{ ".INCLUDES", Includes, 0 },
218	{ ".INTERRUPT", Interrupt, 0 },
219	{ ".INVISIBLE", Attribute, OP_INVISIBLE },
220	{ ".JOIN", Attribute, OP_JOIN },
221	#ifdef USE_ARCHIVES
222	{ ".LIBS", Libs, 0 },
223	#endif
224	{ ".MAIN", Main, 0 },
225	{ ".MAKE", Attribute, OP_MAKE },
226	{ ".MAKEFLAGS", MFlags, 0 },
227	{ ".MFLAGS", MFlags, 0 },
228	{ ".NOTMAIN", Attribute, OP_NOTMAIN },
229	{ ".NOTPARALLEL", NotParallel, 0 },
230	{ ".NO_PARALLEL", NotParallel, 0 },
231	{ ".NULL", Null, 0 },
232	{ ".OPTIONAL", Attribute, OP_OPTIONAL },
233	{ ".ORDER", Order, 0 },
234	{ ".PARALLEL", Parallel, 0 },
235	{ ".PATH", ExPath, 0 },
236	{ ".PHONY", Phony, OP_PHONY },
237	#ifdef POSIX
238	{ ".POSIX", Posix, 0 },
239	#endif
240	{ ".PRECIOUS", Precious, OP_PRECIOUS },
241	{ ".RECURSIVE", Attribute, OP_MAKE },
242	{ ".SHELL", ExShell, 0 },
243	{ ".SILENT", Silent, OP_SILENT },
244	{ ".SINGLESHELL", SingleShell, 0 },
245	{ ".SUFFIXES", Suffixes, 0 },
246	{ ".USE", Attribute, OP_USE },
247	{ ".WAIT", Wait, 0 },
248	};
249
250	static int ParseFindKeyword __P((char *));
251	static int ParseLinkSrc __P((ClientData, ClientData));
252	static int ParseDoOp __P((ClientData, ClientData));
253	static int ParseAddDep __P((ClientData, ClientData));
254	static void ParseDoSrc __P((int, char *, Lst));
255	static int ParseFindMain __P((ClientData, ClientData));
256	static int ParseAddDir __P((ClientData, ClientData));
257	static int ParseClearPath __P((ClientData, ClientData));
258	static void ParseDoDependency __P((char *));
259	static int ParseAddCmd __P((ClientData, ClientData));
260	#ifdef USE_INLINEFILES
261	static int ParseAppendInline __P((ClientData, ClientData));
262	static Boolean ParseCmdIsComponent __P((const char , const char ));
263	#endif
264	static int ParseReadc __P((void));
265	static void ParseUnreadc __P((int));
266	static void ParseHasCommands __P((ClientData));
267	static void ParseDoInclude __P((char *, char));
268	static void ParseDoError __P((char *));
269	#ifdef SYSVINCLUDE
270	static void ParseTraditionalInclude __P((char *));
271	#endif
272	static int ParseEOF __P((int));
273	static char *ParseReadLine __P((void));
274	static char *ParseSkipLine __P((int));
275	static void ParseFinishLine __P((void));
276
277	/*-
278	*----------------------------------------------------------------------
279	* ParseFindKeyword --
280	* Look in the table of keywords for one matching the given string.
281	*
282	* Results:
283	* The index of the keyword, or -1 if it isn't there.
284	*
285	* Side Effects:
286	* None
287	*----------------------------------------------------------------------
288	*/
289	static int
290	ParseFindKeyword (str)
291	char str; / String to find */
292	{
293	register int start,
294	end,
295	cur;
296	register int diff;
297
298	start = 0;
299	end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1;
300
301	do {
302	cur = start + ((end - start) / 2);
303	diff = strcmp (str, parseKeywords[cur].name);
304
305	if (diff == 0) {
306	return (cur);
307	} else if (diff < 0) {
308	end = cur - 1;
309	} else {
310	start = cur + 1;
311	}
312	} while (start <= end);
313	return (-1);
314	}
315
316	/*-
317	* Parse_Error --
318	* Error message abort function for parsing. Prints out the context
319	* of the error (line number and file) as well as the message with
320	* two optional arguments.
321	*
322	* Results:
323	* None
324	*
325	* Side Effects:
326	* "fatals" is incremented if the level is PARSE_FATAL.
327	*/
328	/* VARARGS */
329	void
330	#if defined(__STDC__) \|\| defined(__IBMC__)
331	Parse_Error(int type, char *fmt, ...)
332	#else
333	Parse_Error(va_alist)
334	va_dcl
335	#endif
336	{
337	va_list ap;
338	#if defined(__STDC__) \|\| defined(__IBMC__)
339	va_start(ap, fmt);
340	#else
341	int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */
342	char *fmt;
343
344	va_start(ap);
345	type = va_arg(ap, int);
346	fmt = va_arg(ap, char *);
347	#endif
348
349	(void)fprintf(stderr, "\"%s\", line %d: ", fname, lineno);
350	if (type == PARSE_WARNING)
351	(void)fprintf(stderr, "warning: ");
352	(void)vfprintf(stderr, fmt, ap);
353	va_end(ap);
354	(void)fprintf(stderr, "\n");
355	(void)fflush(stderr);
356	if (type == PARSE_FATAL)
357	fatals += 1;
358	}
359
360	/*-
361	*---------------------------------------------------------------------
362	* ParseLinkSrc --
363	* Link the parent node to its new child. Used in a Lst_ForEach by
364	* ParseDoDependency. If the specType isn't 'Not', the parent
365	* isn't linked as a parent of the child.
366	*
367	* Results:
368	* Always = 0
369	*
370	* Side Effects:
371	* New elements are added to the parents list of cgn and the
372	* children list of cgn. the unmade field of pgn is updated
373	* to reflect the additional child.
374	*---------------------------------------------------------------------
375	*/
376	static int
377	ParseLinkSrc (pgnp, cgnp)
378	ClientData pgnp; /* The parent node */
379	ClientData cgnp; /* The child node */
380	{
381	GNode pgn = (GNode ) pgnp;
382	GNode cgn = (GNode ) cgnp;
383	if (Lst_Member (pgn->children, (ClientData)cgn) == NILLNODE) {
384	(void)Lst_AtEnd (pgn->children, (ClientData)cgn);
385	if (specType == Not) {
386	(void)Lst_AtEnd (cgn->parents, (ClientData)pgn);
387	}
388	pgn->unmade += 1;
389	}
390	return (0);
391	}
392
393	/*-
394	*---------------------------------------------------------------------
395	* ParseDoOp --
396	* Apply the parsed operator to the given target node. Used in a
397	* Lst_ForEach call by ParseDoDependency once all targets have
398	* been found and their operator parsed. If the previous and new
399	* operators are incompatible, a major error is taken.
400	*
401	* Results:
402	* Always 0
403	*
404	* Side Effects:
405	* The type field of the node is altered to reflect any new bits in
406	* the op.
407	*---------------------------------------------------------------------
408	*/
409	static int
410	ParseDoOp (gnp, opp)
411	ClientData gnp; /* The node to which the operator is to be
412	* applied */
413	ClientData opp; /* The operator to apply */
414	{
415	GNode gn = (GNode ) gnp;
416	int op = (int ) opp;
417	/*
418	* If the dependency mask of the operator and the node don't match and
419	* the node has actually had an operator applied to it before, and
420	* the operator actually has some dependency information in it, complain.
421	*/
422	if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) &&
423	!OP_NOP(gn->type) && !OP_NOP(op))
424	{
425	Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name);
426	return (1);
427	}
428
429	if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) {
430	/*
431	* If the node was the object of a :: operator, we need to create a
432	* new instance of it for the children and commands on this dependency
433	* line. The new instance is placed on the 'cohorts' list of the
434	* initial one (note the initial one is not on its own cohorts list)
435	* and the new instance is linked to all parents of the initial
436	* instance.
437	*/
438	register GNode *cohort;
439	LstNode ln;
440
441	cohort = Targ_NewGN(gn->name);
442	/*
443	* Duplicate links to parents so graph traversal is simple. Perhaps
444	* some type bits should be duplicated?
445	*
446	* Make the cohort invisible as well to avoid duplicating it into
447	* other variables. True, parents of this target won't tend to do
448	* anything with their local variables, but better safe than
449	* sorry.
450	*/
451	Lst_ForEach(gn->parents, ParseLinkSrc, (ClientData)cohort);
452	cohort->type = OP_DOUBLEDEP\|OP_INVISIBLE;
453	(void)Lst_AtEnd(gn->cohorts, (ClientData)cohort);
454
455	/*
456	* Replace the node in the targets list with the new copy
457	*/
458	ln = Lst_Member(targets, (ClientData)gn);
459	Lst_Replace(ln, (ClientData)cohort);
460	gn = cohort;
461	}
462	/*
463	* We don't want to nuke any previous flags (whatever they were) so we
464	* just OR the new operator into the old
465	*/
466	gn->type \|= op;
467
468	return (0);
469	}
470
471	/*-
472	*---------------------------------------------------------------------
473	* ParseAddDep --
474	* Check if the pair of GNodes given needs to be synchronized.
475	* This has to be when two nodes are on different sides of a
476	* .WAIT directive.
477	*
478	* Results:
479	* Returns 1 if the two targets need to be ordered, 0 otherwise.
480	* If it returns 1, the search can stop
481	*
482	* Side Effects:
483	* A dependency can be added between the two nodes.
484	*
485	*---------------------------------------------------------------------
486	*/
487	static int
488	ParseAddDep(pp, sp)
489	ClientData pp;
490	ClientData sp;
491	{
492	GNode p = (GNode ) pp;
493	GNode s = (GNode ) sp;
494
495	if (p->order < s->order) {
496	/*
497	* XXX: This can cause loops, and loops can cause unmade targets,
498	* but checking is tedious, and the debugging output can show the
499	* problem
500	*/
501	(void)Lst_AtEnd(p->successors, (ClientData)s);
502	(void)Lst_AtEnd(s->preds, (ClientData)p);
503	return 0;
504	}
505	else
506	return 1;
507	}
508
509
510	/*-
511	*---------------------------------------------------------------------
512	* ParseDoSrc --
513	* Given the name of a source, figure out if it is an attribute
514	* and apply it to the targets if it is. Else decide if there is
515	* some attribute which should be applied to the source because
516	* of some special target and apply it if so. Otherwise, make the
517	* source be a child of the targets in the list 'targets'
518	*
519	* Results:
520	* None
521	*
522	* Side Effects:
523	* Operator bits may be added to the list of targets or to the source.
524	* The targets may have a new source added to their lists of children.
525	*---------------------------------------------------------------------
526	*/
527	static void
528	ParseDoSrc (tOp, src, allsrc)
529	int tOp; /* operator (if any) from special targets */
530	char src; / name of the source to handle */
531	Lst allsrc; /* List of all sources to wait for */
532	{
533	GNode *gn = NULL;
534
535	if (*src == '.' && isupper (src[1])) {
536	int keywd = ParseFindKeyword(src);
537	if (keywd != -1) {
538	int op = parseKeywords[keywd].op;
539	if (op != 0) {
540	Lst_ForEach (targets, ParseDoOp, (ClientData)&op);
541	return;
542	}
543	if (parseKeywords[keywd].spec == Wait) {
544	waiting++;
545	return;
546	}
547	}
548	}
549
550	switch (specType) {
551	case Main:
552	/*
553	* If we have noted the existence of a .MAIN, it means we need
554	* to add the sources of said target to the list of things
555	* to create. The string 'src' is likely to be efree, so we
556	* must make a new copy of it. Note that this will only be
557	* invoked if the user didn't specify a target on the command
558	* line. This is to allow #ifmake's to succeed, or something...
559	*/
560	(void) Lst_AtEnd (create, (ClientData)estrdup(src));
561	/*
562	* Add the name to the .TARGETS variable as well, so the user cna
563	* employ that, if desired.
564	*/
565	Var_Append(".TARGETS", src, VAR_GLOBAL);
566	return;
567
568	case Order:
569	/*
570	* Create proper predecessor/successor links between the previous
571	* source and the current one.
572	*/
573	gn = Targ_FindNode(src, TARG_CREATE);
574	if (predecessor != NILGNODE) {
575	(void)Lst_AtEnd(predecessor->successors, (ClientData)gn);
576	(void)Lst_AtEnd(gn->preds, (ClientData)predecessor);
577	}
578	/*
579	* The current source now becomes the predecessor for the next one.
580	*/
581	predecessor = gn;
582	break;
583
584	default:
585	/*
586	* If the source is not an attribute, we need to find/create
587	* a node for it. After that we can apply any operator to it
588	* from a special target or link it to its parents, as
589	* appropriate.
590	*
591	* In the case of a source that was the object of a :: operator,
592	* the attribute is applied to all of its instances (as kept in
593	* the 'cohorts' list of the node) or all the cohorts are linked
594	* to all the targets.
595	*/
596	gn = Targ_FindNode (src, TARG_CREATE);
597	if (tOp) {
598	gn->type \|= tOp;
599	} else {
600	Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn);
601	}
602	if ((gn->type & OP_OPMASK) == OP_DOUBLEDEP) {
603	register GNode *cohort;
604	register LstNode ln;
605
606	for (ln=Lst_First(gn->cohorts); ln != NILLNODE; ln = Lst_Succ(ln)){
607	cohort = (GNode *)Lst_Datum(ln);
608	if (tOp) {
609	cohort->type \|= tOp;
610	} else {
611	Lst_ForEach(targets, ParseLinkSrc, (ClientData)cohort);
612	}
613	}
614	}
615	break;
616	}
617
618	gn->order = waiting;
619	(void)Lst_AtEnd(allsrc, (ClientData)gn);
620	if (waiting) {
621	Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn);
622	}
623	}
624
625	/*-
626	*-----------------------------------------------------------------------
627	* ParseFindMain --
628	* Find a real target in the list and set it to be the main one.
629	* Called by ParseDoDependency when a main target hasn't been found
630	* yet.
631	*
632	* Results:
633	* 0 if main not found yet, 1 if it is.
634	*
635	* Side Effects:
636	* mainNode is changed and Targ_SetMain is called.
637	*
638	*-----------------------------------------------------------------------
639	*/
640	static int
641	ParseFindMain(gnp, dummy)
642	ClientData gnp; /* Node to examine */
643	ClientData dummy;
644	{
645	GNode gn = (GNode ) gnp;
646	if ((gn->type & (OP_NOTMAIN\|OP_USE\|OP_EXEC\|OP_TRANSFORM)) == 0) {
647	mainNode = gn;
648	Targ_SetMain(gn);
649	return (dummy ? 1 : 1);
650	} else {
651	return (dummy ? 0 : 0);
652	}
653	}
654
655	/*-
656	*-----------------------------------------------------------------------
657	* ParseAddDir --
658	* Front-end for Dir_AddDir to make sure Lst_ForEach keeps going
659	*
660	* Results:
661	* === 0
662	*
663	* Side Effects:
664	* See Dir_AddDir.
665	*
666	*-----------------------------------------------------------------------
667	*/
668	static int
669	ParseAddDir(path, name)
670	ClientData path;
671	ClientData name;
672	{
673	Dir_AddDir((Lst) path, (char *) name);
674	return(0);
675	}
676
677	/*-
678	*-----------------------------------------------------------------------
679	* ParseClearPath --
680	* Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going
681	*
682	* Results:
683	* === 0
684	*
685	* Side Effects:
686	* See Dir_ClearPath
687	*
688	*-----------------------------------------------------------------------
689	*/
690	static int
691	ParseClearPath(path, dummy)
692	ClientData path;
693	ClientData dummy;
694	{
695	Dir_ClearPath((Lst) path);
696	return(dummy ? 0 : 0);
697	}
698
699	/*-
700	*---------------------------------------------------------------------
701	* ParseDoDependency --
702	* Parse the dependency line in line.
703	*
704	* Results:
705	* None
706	*
707	* Side Effects:
708	* The nodes of the sources are linked as children to the nodes of the
709	* targets. Some nodes may be created.
710	*
711	* We parse a dependency line by first extracting words from the line and
712	* finding nodes in the list of all targets with that name. This is done
713	* until a character is encountered which is an operator character. Currently
714	* these are only ! and :. At this point the operator is parsed and the
715	* pointer into the line advanced until the first source is encountered.
716	* The parsed operator is applied to each node in the 'targets' list,
717	* which is where the nodes found for the targets are kept, by means of
718	* the ParseDoOp function.
719	* The sources are read in much the same way as the targets were except
720	* that now they are expanded using the wildcarding scheme of the C-Shell
721	* and all instances of the resulting words in the list of all targets
722	* are found. Each of the resulting nodes is then linked to each of the
723	* targets as one of its children.
724	* Certain targets are handled specially. These are the ones detailed
725	* by the specType variable.
726	* The storing of transformation rules is also taken care of here.
727	* A target is recognized as a transformation rule by calling
728	* Suff_IsTransform. If it is a transformation rule, its node is gotten
729	* from the suffix module via Suff_AddTransform rather than the standard
730	* Targ_FindNode in the target module.
731	*---------------------------------------------------------------------
732	*/
733	static void
734	ParseDoDependency (line)
735	char line; / the line to parse */
736	{
737	char cp; / our current position */
738	GNode gn; / a general purpose temporary node */
739	int op; /* the operator on the line */
740	char savec; /* a place to save a character */
741	Lst paths; /* List of search paths to alter when parsing
742	* a list of .PATH targets */
743	int tOp; /* operator from special target */
744	#ifdef USE_ARCHIVES
745	Lst sources; /* list of archive source names after
746	* expansion */
747	#endif
748	Lst curTargs; /* list of target names to be found and added
749	* to the targets list */
750	Lst curSrcs; /* list of sources in order */
751
752	tOp = 0;
753
754	specType = Not;
755	waiting = 0;
756	paths = (Lst)NULL;
757
758	curTargs = Lst_Init(FALSE);
759	curSrcs = Lst_Init(FALSE);
760
761	do {
762	for (cp = line;
763	cp && !isspace (cp) &&
764	(cp != '!') && (cp != ':') && (*cp != '(');
765	cp++)
766	{
767	if (*cp == '$') {
768	/*
769	* Must be a dynamic source (would have been expanded
770	* otherwise), so call the Var module to parse the puppy
771	* so we can safely advance beyond it...There should be
772	* no errors in this, as they would have been discovered
773	* in the initial Var_Subst and we wouldn't be here.
774	*/
775	int length;
776	Boolean freeIt;
777	char *result;
778
779	result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt);
780
781	if (freeIt) {
782	efree(result);
783	}
784	cp += length-1;
785	}
786	continue;
787	}
788	if (*cp == '(') {
789	#ifdef USE_ARCHIVES
790	/*
791	* Archives must be handled specially to make sure the OP_ARCHV
792	* flag is set in their 'type' field, for one thing, and because
793	* things like "archive(file1.o file2.o file3.o)" are permissible.
794	* Arch_ParseArchive will set 'line' to be the first non-blank
795	* after the archive-spec. It creates/finds nodes for the members
796	* and places them on the given list, returning SUCCESS if all
797	* went well and FAILURE if there was an error in the
798	* specification. On error, line should remain untouched.
799	*/
800	if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) {
801	Parse_Error (PARSE_FATAL,
802	"Error in archive specification: \"%s\"", line);
803	return;
804	} else
805	continue;
806	#else
807	Parse_Error(PARSE_FATAL, "Archives are not supported!", line);
808	return;
809	#endif /* USE_ARCHIVES */
810	}
811	savec = *cp;
812
813	if (!*cp) {
814	/*
815	* Ending a dependency line without an operator is a Bozo
816	* no-no
817	*/
818	Parse_Error (PARSE_FATAL, "Need an operator");
819	return;
820	}
821	*cp = '\0';
822	/*
823	* Have a word in line. See if it's a special target and set
824	* specType to match it.
825	*/
826	if (*line == '.' && isupper (line[1])) {
827	/*
828	* See if the target is a special target that must have it
829	* or its sources handled specially.
830	*/
831	int keywd = ParseFindKeyword(line);
832	if (keywd != -1) {
833	if (specType == ExPath && parseKeywords[keywd].spec != ExPath) {
834	Parse_Error(PARSE_FATAL, "Mismatched special targets");
835	return;
836	}
837
838	specType = parseKeywords[keywd].spec;
839	tOp = parseKeywords[keywd].op;
840
841	/*
842	* Certain special targets have special semantics:
843	* .PATH Have to set the dirSearchPath
844	* variable too
845	* .MAIN Its sources are only used if
846	* nothing has been specified to
847	* create.
848	* .DEFAULT Need to create a node to hang
849	* commands on, but we don't want
850	* it in the graph, nor do we want
851	* it to be the Main Target, so we
852	* create it, set OP_NOTMAIN and
853	* add it to the list, setting
854	* DEFAULT to the new node for
855	* later use. We claim the node is
856	* A transformation rule to make
857	* life easier later, when we'll
858	* use Make_HandleUse to actually
859	* apply the .DEFAULT commands.
860	* .PHONY The list of targets
861	* .BEGIN
862	* .END
863	* .INTERRUPT Are not to be considered the
864	* main target.
865	* .NOTPARALLEL Make only one target at a time.
866	* .SINGLESHELL Create a shell for each command.
867	* .ORDER Must set initial predecessor to NIL
868	*/
869	switch (specType) {
870	case ExPath:
871	if (paths == NULL) {
872	paths = Lst_Init(FALSE);
873	}
874	(void)Lst_AtEnd(paths, (ClientData)dirSearchPath);
875	break;
876	case Main:
877	if (!Lst_IsEmpty(create)) {
878	specType = Not;
879	}
880	break;
881	case Begin:
882	case End:
883	case Interrupt:
884	gn = Targ_FindNode(line, TARG_CREATE);
885	gn->type \|= OP_NOTMAIN;
886	(void)Lst_AtEnd(targets, (ClientData)gn);
887	break;
888	case Default:
889	gn = Targ_NewGN(".DEFAULT");
890	gn->type \|= (OP_NOTMAIN\|OP_TRANSFORM);
891	(void)Lst_AtEnd(targets, (ClientData)gn);
892	DEFAULT = gn;
893	break;
894	case NotParallel:
895	{
896	extern int maxJobs;
897
898	maxJobs = 1;
899	break;
900	}
901	case SingleShell:
902	compatMake = 1;
903	break;
904	case Order:
905	predecessor = NILGNODE;
906	break;
907	default:
908	break;
909	}
910	} else if (strncmp (line, ".PATH", 5) == 0) {
911	/*
912	* .PATH<suffix> has to be handled specially.
913	* Call on the suffix module to give us a path to
914	* modify.
915	*/
916	Lst path;
917
918	specType = ExPath;
919	path = Suff_GetPath (&line[5]);
920	if (path == NILLST) {
921	Parse_Error (PARSE_FATAL,
922	"Suffix '%s' not defined (yet)",
923	&line[5]);
924	return;
925	} else {
926	if (paths == (Lst)NULL) {
927	paths = Lst_Init(FALSE);
928	}
929	(void)Lst_AtEnd(paths, (ClientData)path);
930	}
931	}
932	}
933
934	/*
935	* Have word in line. Get or create its node and stick it at
936	* the end of the targets list
937	*/
938	if ((specType == Not) && (*line != '\0')) {
939	if (Dir_HasWildcards(line)) {
940	/*
941	* Targets are to be sought only in the current directory,
942	* so create an empty path for the thing. Note we need to
943	* use Dir_Destroy in the destruction of the path as the
944	* Dir module could have added a directory to the path...
945	*/
946	Lst emptyPath = Lst_Init(FALSE);
947
948	Dir_Expand(line, emptyPath, curTargs);
949
950	Lst_Destroy(emptyPath, Dir_Destroy);
951	} else {
952	/*
953	* No wildcards, but we want to avoid code duplication,
954	* so create a list with the word on it.
955	*/
956	(void)Lst_AtEnd(curTargs, (ClientData)line);
957	}
958
959	while(!Lst_IsEmpty(curTargs)) {
960	char targName = (char )Lst_DeQueue(curTargs);
961
962	if (!Suff_IsTransform (targName)) {
963	gn = Targ_FindNode (targName, TARG_CREATE);
964	} else {
965	gn = Suff_AddTransform (targName);
966	}
967
968	(void)Lst_AtEnd (targets, (ClientData)gn);
969	}
970	} else if (specType == ExPath && line != '.' && line != '\0') {
971	Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line);
972	}
973
974	*cp = savec;
975	/*
976	* If it is a special type and not .PATH, it's the only target we
977	* allow on this line...
978	*/
979	if (specType != Not && specType != ExPath) {
980	Boolean warn = FALSE;
981
982	while ((cp != '!') && (cp != ':') && *cp) {
983	if (cp != ' ' && cp != '\t') {
984	warn = TRUE;
985	}
986	cp++;
987	}
988	if (warn) {
989	Parse_Error(PARSE_WARNING, "Extra target ignored");
990	}
991	} else {
992	while (cp && isspace (cp)) {
993	cp++;
994	}
995	}
996	line = cp;
997	} while ((line != '!') && (line != ':') && *line);
998
999	/*
1000	* Don't need the list of target names anymore...
1001	*/
1002	Lst_Destroy(curTargs, NOFREE);
1003
1004	if (!Lst_IsEmpty(targets)) {
1005	switch(specType) {
1006	default:
1007	Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored");
1008	break;
1009	case Default:
1010	case Begin:
1011	case End:
1012	case Interrupt:
1013	/*
1014	* These four create nodes on which to hang commands, so
1015	* targets shouldn't be empty...
1016	*/
1017	case Not:
1018	/*
1019	* Nothing special here -- targets can be empty if it wants.
1020	*/
1021	break;
1022	}
1023	}
1024
1025	/*
1026	* Have now parsed all the target names. Must parse the operator next. The
1027	* result is left in op .
1028	*/
1029	if (*cp == '!') {
1030	op = OP_FORCE;
1031	} else if (*cp == ':') {
1032	if (cp[1] == ':') {
1033	op = OP_DOUBLEDEP;
1034	cp++;
1035	} else {
1036	op = OP_DEPENDS;
1037	}
1038	} else {
1039	Parse_Error (PARSE_FATAL, "Missing dependency operator");
1040	return;
1041	}
1042
1043	cp++; /* Advance beyond operator */
1044
1045	Lst_ForEach (targets, ParseDoOp, (ClientData)&op);
1046
1047	/*
1048	* Get to the first source
1049	*/
1050	while (cp && isspace (cp)) {
1051	cp++;
1052	}
1053	line = cp;
1054
1055	/*
1056	* Several special targets take different actions if present with no
1057	* sources:
1058	* a .SUFFIXES line with no sources clears out all old suffixes
1059	* a .PRECIOUS line makes all targets precious
1060	* a .IGNORE line ignores errors for all targets
1061	* a .SILENT line creates silence when making all targets
1062	* a .PATH removes all directories from the search path(s).
1063	*/
1064	if (!*line) {
1065	switch (specType) {
1066	case Suffixes:
1067	Suff_ClearSuffixes ();
1068	break;
1069	case Precious:
1070	allPrecious = TRUE;
1071	break;
1072	case Ignore:
1073	ignoreErrors = TRUE;
1074	break;
1075	case Silent:
1076	beSilent = TRUE;
1077	break;
1078	case ExPath:
1079	Lst_ForEach(paths, ParseClearPath, (ClientData)NULL);
1080	break;
1081	#ifdef POSIX
1082	case Posix:
1083	Var_Set("%POSIX", "1003.2", VAR_GLOBAL);
1084	break;
1085	#endif
1086	default:
1087	break;
1088	}
1089	} else if (specType == MFlags) {
1090	/*
1091	* Call on functions in main.c to deal with these arguments and
1092	* set the initial character to a null-character so the loop to
1093	* get sources won't get anything
1094	*/
1095	Main_ParseArgLine (line);
1096	*line = '\0';
1097	} else if (specType == ExShell) {
1098	#ifdef KMK
1099	Parse_Error(PARSE_FATAL, "shell specification not supported by kMk!");
1100	return;
1101	#else
1102	if (Job_ParseShell (line) != SUCCESS) {
1103	Parse_Error (PARSE_FATAL, "improper shell specification");
1104	return;
1105	}
1106	#endif
1107	*line = '\0';
1108	} else if ((specType == NotParallel) \|\| (specType == SingleShell)) {
1109	*line = '\0';
1110	}
1111
1112	/*
1113	* NOW GO FOR THE SOURCES
1114	*/
1115	if ((specType == Suffixes) \|\| (specType == ExPath) \|\|
1116	(specType == Includes) \|\|
1117	#ifdef USE_ARCHIVES
1118	(specType == Libs) \|\|
1119	#endif
1120	(specType == Null))
1121	{
1122	while (*line) {
1123	/*
1124	* If the target was one that doesn't take files as its sources
1125	* but takes something like suffixes, we take each
1126	* space-separated word on the line as a something and deal
1127	* with it accordingly.
1128	*
1129	* If the target was .SUFFIXES, we take each source as a
1130	* suffix and add it to the list of suffixes maintained by the
1131	* Suff module.
1132	*
1133	* If the target was a .PATH, we add the source as a directory
1134	* to search on the search path.
1135	*
1136	* If it was .INCLUDES, the source is taken to be the suffix of
1137	* files which will be #included and whose search path should
1138	* be present in the .INCLUDES variable.
1139	*
1140	* If it was .LIBS, the source is taken to be the suffix of
1141	* files which are considered libraries and whose search path
1142	* should be present in the .LIBS variable.
1143	*
1144	* If it was .NULL, the source is the suffix to use when a file
1145	* has no valid suffix.
1146	*/
1147	char savec;
1148	while (cp && !isspace (cp)) {
1149	cp++;
1150	}
1151	savec = *cp;
1152	*cp = '\0';
1153	switch (specType) {
1154	case Suffixes:
1155	Suff_AddSuffix (line);
1156	break;
1157	case ExPath:
1158	Lst_ForEach(paths, ParseAddDir, (ClientData)line);
1159	break;
1160	case Includes:
1161	Suff_AddInclude (line);
1162	break;
1163	#ifdef USE_ARCHIVES
1164	case Libs:
1165	Suff_AddLib (line);
1166	break;
1167	#endif
1168	case Null:
1169	Suff_SetNull (line);
1170	break;
1171	default:
1172	break;
1173	}
1174	*cp = savec;
1175	if (savec != '\0') {
1176	cp++;
1177	}
1178	while (cp && isspace (cp)) {
1179	cp++;
1180	}
1181	line = cp;
1182	}
1183	if (paths) {
1184	Lst_Destroy(paths, NOFREE);
1185	}
1186	} else {
1187	while (*line) {
1188	/*
1189	* The targets take real sources, so we must beware of archive
1190	* specifications (i.e. things with left parentheses in them)
1191	* and handle them accordingly.
1192	*/
1193	while (cp && !isspace (cp)) {
1194	if ((*cp == '(') && (cp > line) && (cp[-1] != '$')) {
1195	/*
1196	* Only stop for a left parenthesis if it isn't at the
1197	* start of a word (that'll be for variable changes
1198	* later) and isn't preceded by a dollar sign (a dynamic
1199	* source).
1200	*/
1201	break;
1202	} else {
1203	cp++;
1204	}
1205	}
1206
1207	if (*cp == '(') {
1208	#ifdef USE_ARCHIVES
1209	GNode *gn;
1210
1211	sources = Lst_Init (FALSE);
1212	if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) {
1213	Parse_Error (PARSE_FATAL,
1214	"Error in source archive spec \"%s\"", line);
1215	return;
1216	}
1217
1218	while (!Lst_IsEmpty (sources)) {
1219	gn = (GNode *) Lst_DeQueue (sources);
1220	ParseDoSrc (tOp, gn->name, curSrcs);
1221	}
1222	Lst_Destroy (sources, NOFREE);
1223	cp = line;
1224	#else
1225	Parse_Error(PARSE_FATAL, "Archives are not supported!", line);
1226	return;
1227	#endif /* USE_ARCHIVES */
1228	} else {
1229	if (*cp) {
1230	*cp = '\0';
1231	cp += 1;
1232	}
1233
1234	ParseDoSrc (tOp, line, curSrcs);
1235	}
1236	while (cp && isspace (cp)) {
1237	cp++;
1238	}
1239	line = cp;
1240	}
1241	}
1242
1243	if (mainNode == NILGNODE) {
1244	/*
1245	* If we have yet to decide on a main target to make, in the
1246	* absence of any user input, we want the first target on
1247	* the first dependency line that is actually a real target
1248	* (i.e. isn't a .USE or .EXEC rule) to be made.
1249	*/
1250	Lst_ForEach (targets, ParseFindMain, (ClientData)0);
1251	}
1252
1253	/*
1254	* Finally, destroy the list of sources
1255	*/
1256	Lst_Destroy(curSrcs, NOFREE);
1257	}
1258
1259	/*-
1260	*---------------------------------------------------------------------
1261	* Parse_IsVar --
1262	* Return TRUE if the passed line is a variable assignment. A variable
1263	* assignment consists of a single word followed by optional whitespace
1264	* followed by either a += or an = operator.
1265	* This function is used both by the Parse_File function and main when
1266	* parsing the command-line arguments.
1267	*
1268	* Results:
1269	* TRUE if it is. FALSE if it ain't
1270	*
1271	* Side Effects:
1272	* none
1273	*---------------------------------------------------------------------
1274	*/
1275	Boolean
1276	Parse_IsVar (line)
1277	register char line; / the line to check */
1278	{
1279	register Boolean wasSpace = FALSE; /* set TRUE if found a space */
1280	register Boolean haveName = FALSE; /* Set TRUE if have a variable name */
1281	int level = 0;
1282	#define ISEQOPERATOR(c) \
1283	(((c) == '+') \|\| ((c) == ':') \|\| ((c) == '?') \|\| ((c) == '!'))
1284
1285	/*
1286	* Skip to variable name
1287	*/
1288	for (;(line == ' ') \|\| (line == '\t'); line++)
1289	continue;
1290
1291	for (; *line != '=' \|\| level != 0; line++)
1292	switch (*line) {
1293	case '\0':
1294	/*
1295	* end-of-line -- can't be a variable assignment.
1296	*/
1297	return FALSE;
1298
1299	case ' ':
1300	case '\t':
1301	/*
1302	* there can be as much white space as desired so long as there is
1303	* only one word before the operator
1304	*/
1305	wasSpace = TRUE;
1306	break;
1307
1308	case '(':
1309	case '{':
1310	level++;
1311	break;
1312
1313	case '}':
1314	case ')':
1315	level--;
1316	break;
1317
1318	default:
1319	if (wasSpace && haveName) {
1320	if (ISEQOPERATOR(*line)) {
1321	/*
1322	* We must have a finished word
1323	*/
1324	if (level != 0)
1325	return FALSE;
1326
1327	/*
1328	* When an = operator [+?!:] is found, the next
1329	* character must be an = or it ain't a valid
1330	* assignment.
1331	*/
1332	if (line[1] == '=')
1333	return haveName;
1334	#ifdef SUNSHCMD
1335	/*
1336	* This is a shell command
1337	*/
1338	if (strncmp(line, ":sh", 3) == 0)
1339	return haveName;
1340	#endif
1341	}
1342	/*
1343	* This is the start of another word, so not assignment.
1344	*/
1345	return FALSE;
1346	}
1347	else {
1348	haveName = TRUE;
1349	wasSpace = FALSE;
1350	}
1351	break;
1352	}
1353
1354	return haveName;
1355	}
1356
1357	/*-
1358	*---------------------------------------------------------------------
1359	* Parse_DoVar --
1360	* Take the variable assignment in the passed line and do it in the
1361	* global context.
1362	*
1363	* Note: There is a lexical ambiguity with assignment modifier characters
1364	* in variable names. This routine interprets the character before the =
1365	* as a modifier. Therefore, an assignment like
1366	* C++=/usr/bin/CC
1367	* is interpreted as "C+ +=" instead of "C++ =".
1368	*
1369	* Results:
1370	* none
1371	*
1372	* Side Effects:
1373	* the variable structure of the given variable name is altered in the
1374	* global context.
1375	*---------------------------------------------------------------------
1376	*/
1377	void
1378	Parse_DoVar (line, ctxt)
1379	char line; / a line guaranteed to be a variable
1380	* assignment. This reduces error checks */
1381	GNode ctxt; / Context in which to do the assignment */
1382	{
1383	char cp; / pointer into line */
1384	enum {
1385	VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL
1386	} type; /* Type of assignment */
1387	char opc; / ptr to operator character to
1388	* null-terminate the variable name */
1389	/*
1390	* Avoid clobbered variable warnings by forcing the compiler
1391	* to ``unregister'' variables
1392	*/
1393	#if __GNUC__
1394	(void) &cp;
1395	(void) &line;
1396	#endif
1397
1398	/*
1399	* Skip to variable name
1400	*/
1401	while ((line == ' ') \|\| (line == '\t')) {
1402	line++;
1403	}
1404
1405	/*
1406	* Skip to operator character, nulling out whitespace as we go
1407	*/
1408	for (cp = line + 1; *cp != '='; cp++) {
1409	if (isspace (*cp)) {
1410	*cp = '\0';
1411	}
1412	}
1413	opc = cp-1; /* operator is the previous character */
1414	cp++ = '\0'; / nuke the = */
1415
1416	/*
1417	* Check operator type
1418	*/
1419	switch (*opc) {
1420	case '+':
1421	type = VAR_APPEND;
1422	*opc = '\0';
1423	break;
1424
1425	case '?':
1426	/*
1427	* If the variable already has a value, we don't do anything.
1428	*/
1429	*opc = '\0';
1430	if (Var_Exists(line, ctxt)) {
1431	return;
1432	} else {
1433	type = VAR_NORMAL;
1434	}
1435	break;
1436
1437	case ':':
1438	type = VAR_SUBST;
1439	*opc = '\0';
1440	break;
1441
1442	case '!':
1443	type = VAR_SHELL;
1444	*opc = '\0';
1445	break;
1446
1447	default:
1448	#ifdef SUNSHCMD
1449	while (*opc != ':')
1450	if (opc == line)
1451	break;
1452	else
1453	--opc;
1454
1455	if (strncmp(opc, ":sh", 3) == 0) {
1456	type = VAR_SHELL;
1457	*opc = '\0';
1458	break;
1459	}
1460	#endif
1461	type = VAR_NORMAL;
1462	break;
1463	}
1464
1465	while (isspace (*cp)) {
1466	cp++;
1467	}
1468
1469	if (type == VAR_APPEND) {
1470	Var_Append (line, cp, ctxt);
1471	} else if (type == VAR_SUBST) {
1472	/*
1473	* Allow variables in the old value to be undefined, but leave their
1474	* invocation alone -- this is done by forcing oldVars to be false.
1475	* XXX: This can cause recursive variables, but that's not hard to do,
1476	* and this allows someone to do something like
1477	*
1478	* CFLAGS = $(.INCLUDES)
1479	* CFLAGS := -I.. $(CFLAGS)
1480	*
1481	* And not get an error.
1482	*/
1483	Boolean oldOldVars = oldVars;
1484
1485	oldVars = FALSE;
1486	cp = Var_Subst(NULL, cp, ctxt, FALSE);
1487	oldVars = oldOldVars;
1488
1489	Var_Set(line, cp, ctxt);
1490	efree(cp);
1491	} else if (type == VAR_SHELL) {
1492	Boolean freeCmd = FALSE; /* TRUE if the command needs to be freed, i.e.
1493	* if any variable expansion was performed */
1494	char res, err;
1495
1496	if (strchr(cp, '$') != NULL) {
1497	/*
1498	* There's a dollar sign in the command, so perform variable
1499	* expansion on the whole thing. The resulting string will need
1500	* freeing when we're done, so set freeCmd to TRUE.
1501	*/
1502	cp = Var_Subst(NULL, cp, VAR_CMD, TRUE);
1503	freeCmd = TRUE;
1504	}
1505
1506	res = Cmd_Exec(cp, &err);
1507	Var_Set(line, res, ctxt);
1508	efree(res);
1509
1510	if (err)
1511	Parse_Error(PARSE_WARNING, err, cp);
1512
1513	if (freeCmd)
1514	efree(cp);
1515	} else {
1516	/*
1517	* Normal assignment -- just do it.
1518	*/
1519	Var_Set(line, cp, ctxt);
1520	}
1521	}
1522
1523
1524	/*-
1525	* ParseAddCmd --
1526	* Lst_ForEach function to add a command line to all targets
1527	*
1528	* Results:
1529	* Always 0
1530	*
1531	* Side Effects:
1532	* A new element is added to the commands list of the node.
1533	*/
1534	static int
1535	ParseAddCmd(gnp, cmd)
1536	ClientData gnp; /* the node to which the command is to be added */
1537	ClientData cmd; /* the command to add */
1538	{
1539	GNode gn = (GNode ) gnp;
1540	/* if target already supplied, ignore commands */
1541	if (!(gn->type & OP_HAS_COMMANDS))
1542	(void)Lst_AtEnd(gn->commands, cmd);
1543	return(0);
1544	}
1545
1546
1547
1548	#ifdef USE_INLINEFILES
1549	/*-
1550	* ParseAppendInline --
1551	* Lst_ForEach function to append the line to the last command
1552	*
1553	* Results:
1554	* Always 0
1555	*
1556	* Side Effects:
1557	* A new element is added to the last commands list of the node.
1558	*/
1559	static int
1560	ParseAppendInline(gnp, line)
1561	ClientData gnp; /* the node to which the command is to be added */
1562	ClientData line; /* the command to add */
1563	{
1564	GNode gn = (GNode )gnp;
1565	/* if target already supplied, ignore commands */
1566	if (!(gn->type & OP_HAS_COMMANDS))
1567	{
1568	unsigned cch;
1569	char * cmd;
1570	unsigned cchNew;
1571	cmd = (char*)Lst_Datum(Lst_Last(gn->commands));
1572	cch = strlen(cmd);
1573	cchNew = strlen(line);
1574	cmd = erealloc(cmd, cch + 1 + cchNew + 1);
1575	cmd[cch] = '\n';
1576	memcpy(&cmd[cch + 1], line, cchNew + 1);
1577	Lst_Replace(Lst_Last(gn->commands), cmd);
1578	}
1579	return(0);
1580	}
1581
1582	/*-
1583	*-----------------------------------------------------------------------
1584	* ParseCmdIsComponent --
1585	* Checks if the comp is a component in the cmdline.
1586	*
1587	* Results:
1588	* returns TRUE if it is, FALSE if not.
1589	*
1590	* Side Effects:
1591	* OP_HAS_COMMANDS may be set for the target.
1592	*
1593	*-----------------------------------------------------------------------
1594	*/
1595	static Boolean
1596	ParseCmdIsComponent(cmdline, comp)
1597	const char *cmdline;
1598	const char *comp;
1599	{
1600	#if 0 /* @todo FIX THIS */
1601	const char * psz;
1602	char chQuote;
1603	int cchComp;
1604	register char ch;
1605
1606	/** ASSUMES NOT ESCAPED (but then the shell doesn't support escaping anyway) */
1607	if (!strstr(cmdline, comp))
1608	return FALSE;
1609
1610	cchComp = strlen(comp);
1611	for (chQuote = '\0', ch = cmdline, psz = NULL; ch; ch = ++cmdline)
1612	{
1613	if (ch == '\'' \|\| ch == '\"')
1614	{
1615	if (chQuote)
1616	{ /* end of story */
1617	if (cmdline - psz == cchComp && !strncmp(psz, comp, cchComp))
1618	return TRUE;
1619	chQuote = '\0';
1620	psz = NULL;
1621	}
1622	else
1623	{
1624	chQuote = ch;
1625	if (!psz)
1626	psz = cmdline + 1;
1627	}
1628	} else if (!chQuote && !psz && !isspace(ch))
1629	psz = cmdline;
1630	}
1631
1632	return FALSE;
1633
1634	#else
1635	return strstr(cmdline, comp) != NULL;
1636
1637	#endif
1638	}
1639	#endif
1640
1641	/*-
1642	*-----------------------------------------------------------------------
1643	* ParseHasCommands --
1644	* Callback procedure for Parse_File when destroying the list of
1645	* targets on the last dependency line. Marks a target as already
1646	* having commands if it does, to keep from having shell commands
1647	* on multiple dependency lines.
1648	*
1649	* Results:
1650	* None
1651	*
1652	* Side Effects:
1653	* OP_HAS_COMMANDS may be set for the target.
1654	*
1655	*-----------------------------------------------------------------------
1656	*/
1657	static void
1658	ParseHasCommands(gnp)
1659	ClientData gnp; /* Node to examine */
1660	{
1661	GNode gn = (GNode ) gnp;
1662	if (!Lst_IsEmpty(gn->commands)) {
1663	gn->type \|= OP_HAS_COMMANDS;
1664	}
1665	}
1666
1667	/*-
1668	*-----------------------------------------------------------------------
1669	* Parse_AddIncludeDir --
1670	* Add a directory to the path searched for included makefiles
1671	* bracketed by double-quotes. Used by functions in main.c
1672	*
1673	* Results:
1674	* None.
1675	*
1676	* Side Effects:
1677	* The directory is appended to the list.
1678	*
1679	*-----------------------------------------------------------------------
1680	*/
1681	void
1682	Parse_AddIncludeDir (dir)
1683	char dir; / The name of the directory to add */
1684	{
1685	Dir_AddDir (parseIncPath, dir);
1686	}
1687
1688	/*---------------------------------------------------------------------
1689	* ParseDoError --
1690	* Handle error directive
1691	*
1692	* The input is the line minus the ".error". We substitute variables,
1693	* print the message and exit(1) or just print a warning if the ".error"
1694	* directive is malformed.
1695	*
1696	*---------------------------------------------------------------------
1697	*/
1698	static void
1699	ParseDoError(errmsg)
1700	char errmsg; / error message */
1701	{
1702	if (!isspace(*errmsg)) {
1703	Parse_Error(PARSE_WARNING, "invalid syntax: .error%s", errmsg);
1704	return;
1705	}
1706
1707	while (isspace(*errmsg))
1708	errmsg++;
1709
1710	errmsg = Var_Subst(NULL, errmsg, VAR_GLOBAL, FALSE);
1711
1712	/* use fprintf/exit instead of Parse_Error to terminate immediately */
1713	fprintf(stderr, "\"%s\", line %d: %s\n", fname, lineno, errmsg);
1714	exit(1);
1715	}
1716
1717	/*-
1718	*---------------------------------------------------------------------
1719	* ParseDoInclude --
1720	* Push to another file.
1721	*
1722	* The input is the line minus the #include. A file spec is a string
1723	* enclosed in <> or "". The former is looked for only in sysIncPath.
1724	* The latter in . and the directories specified by -I command line
1725	* options
1726	*
1727	* Results:
1728	* None
1729	*
1730	* Side Effects:
1731	* A structure is added to the includes Lst and readProc, lineno,
1732	* fname and curFILE are altered for the new file
1733	*---------------------------------------------------------------------
1734	*/
1735	static void
1736	ParseDoInclude (file, chPre)
1737	char file; / file specification */
1738	char chPre; /* Preprocessor char */
1739	{
1740	char fullname; / full pathname of file */
1741	IFile oldFile; / state associated with current file */
1742	char endc; /* the character which ends the file spec */
1743	char cp; / current position in file spec */
1744	Boolean isSystem; /* TRUE if makefile is a system makefile */
1745
1746	/*
1747	* Skip to delimiter character so we know where to look
1748	*/
1749	while ((file == ' ') \|\| (file == '\t')) {
1750	file++;
1751	}
1752
1753	#ifndef NMAKE
1754	if ((file != '"') && (file != '<')) {
1755	Parse_Error (PARSE_FATAL,
1756	"%cinclude filename must be delimited by '\"' or '<'", chPre);
1757	return;
1758	}
1759	#endif
1760
1761	/*
1762	* Set the search path on which to find the include file based on the
1763	* characters which bracket its name. Angle-brackets imply it's
1764	* a system Makefile while double-quotes imply it's a user makefile
1765	*/
1766	if (*file == '<') {
1767	isSystem = TRUE;
1768	endc = '>';
1769	} else {
1770	isSystem = FALSE;
1771	#ifdef NMAKE
1772	if (*file == '"')
1773	endc = '"';
1774	else
1775	{
1776	endc = '\0';
1777	file--;
1778	}
1779	#else
1780	endc = '"';
1781	#endif
1782	}
1783
1784	/*
1785	* Skip to matching delimiter
1786	*/
1787	for (cp = ++file; cp && cp != endc; cp++) {
1788	continue;
1789	}
1790
1791	#ifdef NMAKE
1792	if (endc && *cp != endc) {
1793	#else
1794	if (*cp != endc) {
1795	#endif
1796	Parse_Error (PARSE_FATAL,
1797	"Unclosed %cinclude filename. '%c' expected",
1798	chPre, endc);
1799	return;
1800	}
1801	*cp = '\0';
1802
1803	/*
1804	* Substitute for any variables in the file name before trying to
1805	* find the thing.
1806	*/
1807	file = Var_Subst (NULL, file, VAR_CMD, FALSE);
1808
1809	/*
1810	* Now we know the file's name and its search path, we attempt to
1811	* find the durn thing. A return of NULL indicates the file don't
1812	* exist.
1813	*/
1814	if (!isSystem) {
1815	/*
1816	* Include files contained in double-quotes are first searched for
1817	* relative to the including file's location. We don't want to
1818	* cd there, of course, so we just tack on the old file's
1819	* leading path components and call Dir_FindFile to see if
1820	* we can locate the beast.
1821	*/
1822	char prefEnd, Fname;
1823
1824	/* Make a temporary copy of this, to be safe. */
1825	Fname = estrdup(fname);
1826
1827	prefEnd = strrchr (Fname, '/');
1828	if (prefEnd != (char *)NULL) {
1829	char *newName;
1830
1831	*prefEnd = '\0';
1832	if (file[0] == '/')
1833	newName = estrdup(file);
1834	else
1835	newName = str_concat (Fname, file, STR_ADDSLASH);
1836	fullname = Dir_FindFile (newName, parseIncPath);
1837	if (fullname == (char *)NULL) {
1838	fullname = Dir_FindFile(newName, dirSearchPath);
1839	}
1840	efree (newName);
1841	*prefEnd = '/';
1842	} else {
1843	fullname = (char *)NULL;
1844	}
1845	efree (Fname);
1846	} else {
1847	fullname = (char *)NULL;
1848	}
1849
1850	if (fullname == (char *)NULL) {
1851	/*
1852	* System makefile or makefile wasn't found in same directory as
1853	* included makefile. Search for it first on the -I search path,
1854	* then on the .PATH search path, if not found in a -I directory.
1855	* XXX: Suffix specific?
1856	*/
1857	fullname = Dir_FindFile (file, parseIncPath);
1858	if (fullname == (char *)NULL) {
1859	fullname = Dir_FindFile(file, dirSearchPath);
1860	}
1861	}
1862
1863	if (fullname == (char *)NULL) {
1864	/*
1865	* Still haven't found the makefile. Look for it on the system
1866	* path as a last resort.
1867	*/
1868	fullname = Dir_FindFile(file, sysIncPath);
1869	}
1870
1871	if (fullname == (char *) NULL) {
1872	*cp = endc;
1873	Parse_Error (PARSE_FATAL, "Could not find '%s'", file);
1874	return;
1875	}
1876
1877	efree(file);
1878
1879	/*
1880	* Once we find the absolute path to the file, we get to save all the
1881	* state from the current file before we can start reading this
1882	* include file. The state is stored in an IFile structure which
1883	* is placed on a list with other IFile structures. The list makes
1884	* a very nice stack to track how we got here...
1885	*/
1886	oldFile = (IFile *) emalloc (sizeof (IFile));
1887	oldFile->fname = fname;
1888
1889	oldFile->F = curFILE;
1890	oldFile->p = curPTR;
1891	oldFile->lineno = lineno;
1892
1893	(void) Lst_AtFront (includes, (ClientData)oldFile);
1894
1895	/*
1896	* Once the previous state has been saved, we can get down to reading
1897	* the new file. We set up the name of the file to be the absolute
1898	* name of the include file so error messages refer to the right
1899	* place. Naturally enough, we start reading at line number 0.
1900	*/
1901	fname = fullname;
1902	lineno = 0;
1903
1904	curFILE = fopen (fullname, "r");
1905	curPTR = NULL;
1906	if (curFILE == (FILE * ) NULL) {
1907	Parse_Error (PARSE_FATAL, "Cannot open %s", fullname);
1908	/*
1909	* Pop to previous file
1910	*/
1911	(void) ParseEOF(0);
1912	}
1913	}
1914
1915
1916
1917	/*-
1918	*---------------------------------------------------------------------
1919	* Parse_FromString --
1920	* Start Parsing from the given string
1921	*
1922	* Results:
1923	* None
1924	*
1925	* Side Effects:
1926	* A structure is added to the includes Lst and readProc, lineno,
1927	* fname and curFILE are altered for the new file
1928	*---------------------------------------------------------------------
1929	*/
1930	void
1931	Parse_FromString(str)
1932	char *str;
1933	{
1934	IFile oldFile; / state associated with this file */
1935
1936	if (DEBUG(FOR))
1937	(void) fprintf(stderr, "%s\n----\n", str);
1938
1939	oldFile = (IFile *) emalloc (sizeof (IFile));
1940	oldFile->lineno = lineno;
1941	oldFile->fname = fname;
1942	oldFile->F = curFILE;
1943	oldFile->p = curPTR;
1944
1945	(void) Lst_AtFront (includes, (ClientData)oldFile);
1946
1947	curFILE = NULL;
1948	curPTR = (PTR *) emalloc (sizeof (PTR));
1949	curPTR->str = curPTR->ptr = str;
1950	lineno = 0;
1951	fname = estrdup(fname);
1952	}
1953
1954
1955	#ifdef SYSVINCLUDE
1956	/*-
1957	*---------------------------------------------------------------------
1958	* ParseTraditionalInclude --
1959	* Push to another file.
1960	*
1961	* The input is the line minus the "include". The file name is
1962	* the string following the "include".
1963	*
1964	* Results:
1965	* None
1966	*
1967	* Side Effects:
1968	* A structure is added to the includes Lst and readProc, lineno,
1969	* fname and curFILE are altered for the new file
1970	*---------------------------------------------------------------------
1971	*/
1972	static void
1973	ParseTraditionalInclude (file)
1974	char file; / file specification */
1975	{
1976	char fullname; / full pathname of file */
1977	IFile oldFile; / state associated with current file */
1978	char cp; / current position in file spec */
1979	char *prefEnd;
1980
1981	/*
1982	* Skip over whitespace
1983	*/
1984	while ((file == ' ') \|\| (file == '\t')) {
1985	file++;
1986	}
1987
1988	if (*file == '\0') {
1989	Parse_Error (PARSE_FATAL,
1990	"Filename missing from \"include\"");
1991	return;
1992	}
1993
1994	/*
1995	* Skip to end of line or next whitespace
1996	*/
1997	for (cp = file; cp && cp != '\n' && cp != '\t' && cp != ' '; cp++) {
1998	continue;
1999	}
2000
2001	*cp = '\0';
2002
2003	/*
2004	* Substitute for any variables in the file name before trying to
2005	* find the thing.
2006	*/
2007	file = Var_Subst (NULL, file, VAR_CMD, FALSE);
2008
2009	/*
2010	* Now we know the file's name, we attempt to find the durn thing.
2011	* A return of NULL indicates the file don't exist.
2012	*
2013	* Include files are first searched for relative to the including
2014	* file's location. We don't want to cd there, of course, so we
2015	* just tack on the old file's leading path components and call
2016	* Dir_FindFile to see if we can locate the beast.
2017	* XXX - this does search in the current directory, right?
2018	*/
2019
2020	prefEnd = strrchr (fname, '/');
2021	if (prefEnd != (char *)NULL) {
2022	char *newName;
2023
2024	*prefEnd = '\0';
2025	newName = str_concat (fname, file, STR_ADDSLASH);
2026	fullname = Dir_FindFile (newName, parseIncPath);
2027	if (fullname == (char *)NULL) {
2028	fullname = Dir_FindFile(newName, dirSearchPath);
2029	}
2030	efree (newName);
2031	*prefEnd = '/';
2032	} else {
2033	fullname = (char *)NULL;
2034	}
2035
2036	if (fullname == (char *)NULL) {
2037	/*
2038	* System makefile or makefile wasn't found in same directory as
2039	* included makefile. Search for it first on the -I search path,
2040	* then on the .PATH search path, if not found in a -I directory.
2041	* XXX: Suffix specific?
2042	*/
2043	fullname = Dir_FindFile (file, parseIncPath);
2044	if (fullname == (char *)NULL) {
2045	fullname = Dir_FindFile(file, dirSearchPath);
2046	}
2047	}
2048
2049	if (fullname == (char *)NULL) {
2050	/*
2051	* Still haven't found the makefile. Look for it on the system
2052	* path as a last resort.
2053	*/
2054	fullname = Dir_FindFile(file, sysIncPath);
2055	}
2056
2057	if (fullname == (char *) NULL) {
2058	Parse_Error (PARSE_FATAL, "Could not find %s", file);
2059	return;
2060	}
2061
2062	/*
2063	* Once we find the absolute path to the file, we get to save all the
2064	* state from the current file before we can start reading this
2065	* include file. The state is stored in an IFile structure which
2066	* is placed on a list with other IFile structures. The list makes
2067	* a very nice stack to track how we got here...
2068	*/
2069	oldFile = (IFile *) emalloc (sizeof (IFile));
2070	oldFile->fname = fname;
2071
2072	oldFile->F = curFILE;
2073	oldFile->p = curPTR;
2074	oldFile->lineno = lineno;
2075
2076	(void) Lst_AtFront (includes, (ClientData)oldFile);
2077
2078	/*
2079	* Once the previous state has been saved, we can get down to reading
2080	* the new file. We set up the name of the file to be the absolute
2081	* name of the include file so error messages refer to the right
2082	* place. Naturally enough, we start reading at line number 0.
2083	*/
2084	fname = fullname;
2085	lineno = 0;
2086
2087	curFILE = fopen (fullname, "r");
2088	curPTR = NULL;
2089	if (curFILE == (FILE * ) NULL) {
2090	Parse_Error (PARSE_FATAL, "Cannot open %s", fullname);
2091	/*
2092	* Pop to previous file
2093	*/
2094	(void) ParseEOF(1);
2095	}
2096	}
2097	#endif
2098
2099	/*-
2100	*---------------------------------------------------------------------
2101	* ParseEOF --
2102	* Called when EOF is reached in the current file. If we were reading
2103	* an include file, the includes stack is popped and things set up
2104	* to go back to reading the previous file at the previous location.
2105	*
2106	* Results:
2107	* CONTINUE if there's more to do. DONE if not.
2108	*
2109	* Side Effects:
2110	* The old curFILE, is closed. The includes list is shortened.
2111	* lineno, curFILE, and fname are changed if CONTINUE is returned.
2112	*---------------------------------------------------------------------
2113	*/
2114	static int
2115	ParseEOF (opened)
2116	int opened;
2117	{
2118	IFile ifile; / the state on the top of the includes stack */
2119
2120	if (Lst_IsEmpty (includes)) {
2121	return (DONE);
2122	}
2123
2124	ifile = (IFile *) Lst_DeQueue (includes);
2125	efree ((Address) fname);
2126	fname = ifile->fname;
2127	lineno = ifile->lineno;
2128	if (opened && curFILE)
2129	(void) fclose (curFILE);
2130	if (curPTR) {
2131	efree((Address) curPTR->str);
2132	efree((Address) curPTR);
2133	}
2134	curFILE = ifile->F;
2135	curPTR = ifile->p;
2136	efree ((Address)ifile);
2137	return (CONTINUE);
2138	}
2139
2140	/*-
2141	*---------------------------------------------------------------------
2142	* ParseReadc --
2143	* Read a character from the current file
2144	*
2145	* Results:
2146	* The character that was read
2147	*
2148	* Side Effects:
2149	*---------------------------------------------------------------------
2150	*/
2151	static int
2152	ParseReadc()
2153	{
2154	if (curFILE)
2155	return fgetc(curFILE);
2156
2157	if (curPTR && *curPTR->ptr)
2158	return *curPTR->ptr++;
2159	return EOF;
2160	}
2161
2162
2163	/*-
2164	*---------------------------------------------------------------------
2165	* ParseUnreadc --
2166	* Put back a character to the current file
2167	*
2168	* Results:
2169	* None.
2170	*
2171	* Side Effects:
2172	*---------------------------------------------------------------------
2173	*/
2174	static void
2175	ParseUnreadc(c)
2176	int c;
2177	{
2178	if (curFILE) {
2179	ungetc(c, curFILE);
2180	return;
2181	}
2182	if (curPTR) {
2183	*--(curPTR->ptr) = c;
2184	return;
2185	}
2186	}
2187
2188
2189	/* ParseSkipLine():
2190	* Grab the next line
2191	*/
2192	static char *
2193	ParseSkipLine(skip)
2194	int skip; /* Skip lines that don't start with . */
2195	{
2196	char *line;
2197	int c, lastc, lineLength = 0;
2198	Buffer buf;
2199
2200	buf = Buf_Init(MAKE_BSIZE);
2201
2202	do {
2203	Buf_Discard(buf, lineLength);
2204	lastc = '\0';
2205
2206	while (((c = ParseReadc()) != '\n' \|\| lastc == '\\')
2207	&& c != EOF) {
2208	if (c == '\n') {
2209	Buf_ReplaceLastByte(buf, (Byte)' ');
2210	lineno++;
2211
2212	while ((c = ParseReadc()) == ' ' \|\| c == '\t');
2213
2214	if (c == EOF)
2215	break;
2216	}
2217
2218	Buf_AddByte(buf, (Byte)c);
2219	lastc = c;
2220	}
2221
2222	if (c == EOF) {
2223	Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop");
2224	Buf_Destroy(buf, TRUE);
2225	return((char *)NULL);
2226	}
2227
2228	lineno++;
2229	Buf_AddByte(buf, (Byte)'\0');
2230	line = (char *)Buf_GetAll(buf, &lineLength);
2231	#ifdef NMAKE
2232	} while (skip == 1 && line[0] != '.' && line[0] != '!');
2233	#else
2234	} while (skip == 1 && line[0] != '.');
2235	#endif
2236
2237	Buf_Destroy(buf, FALSE);
2238	return line;
2239	}
2240
2241
2242	/*-
2243	*---------------------------------------------------------------------
2244	* ParseReadLine --
2245	* Read an entire line from the input file. Called only by Parse_File.
2246	* To facilitate escaped newlines and what have you, a character is
2247	* buffered in 'lastc', which is '\0' when no characters have been
2248	* read. When we break out of the loop, c holds the terminating
2249	* character and lastc holds a character that should be added to
2250	* the line (unless we don't read anything but a terminator).
2251	*
2252	* Results:
2253	* A line w/o its newline
2254	*
2255	* Side Effects:
2256	* Only those associated with reading a character
2257	*---------------------------------------------------------------------
2258	*/
2259	static char *
2260	ParseReadLine ()
2261	{
2262	Buffer buf; /* Buffer for current line */
2263	register int c; /* the current character */
2264	register int lastc; /* The most-recent character */
2265	Boolean semiNL; /* treat semi-colons as newlines */
2266	Boolean ignDepOp; /* TRUE if should ignore dependency operators
2267	* for the purposes of setting semiNL */
2268	Boolean ignComment; /* TRUE if should ignore comments (in a
2269	* shell command */
2270	char line; / Result */
2271	char ep; / to strip trailing blanks */
2272	int lineLength; /* Length of result */
2273
2274	semiNL = FALSE;
2275	ignDepOp = FALSE;
2276	#ifdef USE_INLINEFILES
2277	ignComment = inInlineFile;
2278	#else
2279	ignComment = FALSE;
2280	#endif
2281
2282	/*
2283	* Handle special-characters at the beginning of the line. Either a
2284	* leading tab (shell command) or pound-sign (possible conditional)
2285	* forces us to ignore comments and dependency operators and treat
2286	* semi-colons as semi-colons (by leaving semiNL FALSE). This also
2287	* discards completely blank lines.
2288	*/
2289	for (;;) {
2290	c = ParseReadc();
2291	#ifdef USE_INLINEFILES
2292	if (inInlineFile)
2293	break;
2294	#endif
2295
2296	if (c == '\t') {
2297	ignComment = ignDepOp = TRUE;
2298	break;
2299	} else if (c == '\n') {
2300	lineno++;
2301	} else if (c == '#') {
2302	ParseUnreadc(c);
2303	break;
2304	} else {
2305	/*
2306	* Anything else breaks out without doing anything
2307	*/
2308	break;
2309	}
2310	}
2311
2312	if (c != EOF) {
2313	lastc = c;
2314	buf = Buf_Init(MAKE_BSIZE);
2315
2316	/* @todo any inline changes here? */
2317	#ifdef NMAKE
2318	while (((c = ParseReadc ()) != '\n' \|\| (lastc == '\\') \|\| (lastc == '^')) && (c != EOF))
2319	#else
2320	while (((c = ParseReadc ()) != '\n' \|\| (lastc == '\\')) && (c != EOF))
2321	#endif
2322	{
2323	test_char:
2324	switch(c) {
2325	case '\n':
2326	#ifdef USE_INLINEFILES
2327	/* No newline escaping in inline files, unless it's a directive. */
2328	if (inInlineFile) {
2329	int cb;
2330	char *psz = Buf_GetAll(buf, &cb);
2331	#ifdef NMAKE
2332	if (cb > 0 && psz != '.' && psz != '!')
2333	#else
2334	if (cb > 0 && *psz != '.')
2335	#endif
2336	break;
2337	}
2338	#endif
2339
2340	/*
2341	* Escaped newline: read characters until a non-space or an
2342	* unescaped newline and replace them all by a single space.
2343	* This is done by storing the space over the backslash and
2344	* dropping through with the next nonspace. If it is a
2345	* semi-colon and semiNL is TRUE, it will be recognized as a
2346	* newline in the code below this...
2347	*/
2348	lineno++;
2349	lastc = ' ';
2350	#ifdef NMAKE
2351	if (lastc == '^')
2352	lastc = '\n';
2353
2354	do {
2355	while ((c = ParseReadc ()) == ' ' \|\| c == '\t') {
2356	continue;
2357	}
2358	if (c != '#')
2359	break;
2360	/* comment - skip line */
2361	while ((c = ParseReadc ()) != '\n' && c != EOF) {
2362	continue;
2363	}
2364	if (c == EOF)
2365	break;
2366	} while (1);
2367	#else
2368	while ((c = ParseReadc ()) == ' ' \|\| c == '\t') {
2369	continue;
2370	}
2371	#endif
2372	if (c == EOF \|\| c == '\n') {
2373	goto line_read;
2374	} else {
2375	/*
2376	* Check for comments, semiNL's, etc. -- easier than
2377	* ParseUnreadc(c); continue;
2378	*/
2379	goto test_char;
2380	}
2381	/NOTREACHED/
2382	break;
2383
2384	/* We don't need this, and don't want it! */
2385	#ifndef KMK
2386	case ';':
2387	#ifdef USE_INLINEFILES
2388	if (inInlineFile)
2389	break;
2390	#endif
2391	/*
2392	* Semi-colon: Need to see if it should be interpreted as a
2393	* newline
2394	*/
2395	if (semiNL) {
2396	/*
2397	* To make sure the command that may be following this
2398	* semi-colon begins with a tab, we push one back into the
2399	* input stream. This will overwrite the semi-colon in the
2400	* buffer. If there is no command following, this does no
2401	* harm, since the newline remains in the buffer and the
2402	* whole line is ignored.
2403	*/
2404	ParseUnreadc('\t');
2405	goto line_read;
2406	}
2407	break;
2408	case '=':
2409	#ifdef USE_INLINEFILES
2410	if (inInlineFile)
2411	break;
2412	#endif
2413	if (!semiNL) {
2414	/*
2415	* Haven't seen a dependency operator before this, so this
2416	* must be a variable assignment -- don't pay attention to
2417	* dependency operators after this.
2418	*/
2419	ignDepOp = TRUE;
2420	} else if (lastc == ':' \|\| lastc == '!') {
2421	/*
2422	* Well, we've seen a dependency operator already, but it
2423	* was the previous character, so this is really just an
2424	* expanded variable assignment. Revert semi-colons to
2425	* being just semi-colons again and ignore any more
2426	* dependency operators.
2427	*
2428	* XXX: Note that a line like "foo : a:=b" will blow up,
2429	* but who'd write a line like that anyway?
2430	*/
2431	ignDepOp = TRUE; semiNL = FALSE;
2432	}
2433	break;
2434	case '#':
2435	if (!ignComment) {
2436	if (
2437	#if 0
2438	compatMake &&
2439	#endif
2440	(lastc != '\\')) {
2441	/*
2442	* If the character is a hash mark and it isn't escaped
2443	* (or we're being compatible), the thing is a comment.
2444	* Skip to the end of the line.
2445	*/
2446	do {
2447	c = ParseReadc();
2448	} while ((c != '\n') && (c != EOF));
2449	goto line_read;
2450	} else {
2451	/*
2452	* Don't add the backslash. Just let the # get copied
2453	* over.
2454	*/
2455	lastc = c;
2456	continue;
2457	}
2458	}
2459	break;
2460	case ':':
2461	case '!':
2462	#ifdef USE_INLINEFILES
2463	if (inInlineFile)
2464	break;
2465	#endif
2466	if (!ignDepOp && (c == ':' \|\| c == '!')) {
2467	/*
2468	* A semi-colon is recognized as a newline only on
2469	* dependency lines. Dependency lines are lines with a
2470	* colon or an exclamation point. Ergo...
2471	*/
2472	semiNL = TRUE;
2473	}
2474	break;
2475	#endif /* !KMK */
2476	}
2477	/*
2478	* Copy in the previous character and save this one in lastc.
2479	*/
2480	Buf_AddByte (buf, (Byte)lastc);
2481	lastc = c;
2482
2483	}
2484	line_read:
2485	lineno++;
2486
2487	if (lastc != '\0') {
2488	Buf_AddByte (buf, (Byte)lastc);
2489	}
2490	Buf_AddByte (buf, (Byte)'\0');
2491	line = (char *)Buf_GetAll (buf, &lineLength);
2492	Buf_Destroy (buf, FALSE);
2493
2494	/*
2495	* Strip trailing blanks and tabs from the line.
2496	* Do not strip a blank or tab that is preceeded by
2497	* a '\'
2498	*/
2499	#ifdef USE_INLINEFILES
2500	if (!inInlineFile) {
2501	#endif
2502	ep = line;
2503	while (*ep)
2504	++ep;
2505	while (ep > line + 1 && (ep[-1] == ' ' \|\| ep[-1] == '\t')) {
2506	if (ep > line + 1 && ep[-2] == '\\')
2507	break;
2508	--ep;
2509	}
2510	*ep = 0;
2511	#ifdef USE_INLINEFILES
2512	}
2513	#endif
2514
2515	#ifdef NMAKE
2516	if (line[0] == '.' \|\| line[0] == '!') {
2517	#else
2518	if (line[0] == '.') {
2519	#endif
2520	/*
2521	* The line might be a conditional. Ask the conditional module
2522	* about it and act accordingly
2523	*/
2524	switch (Cond_Eval (line)) {
2525	case COND_SKIP:
2526	/*
2527	* Skip to next conditional that evaluates to COND_PARSE.
2528	*/
2529	do {
2530	efree (line);
2531	line = ParseSkipLine(1);
2532	} while (line && Cond_Eval(line) != COND_PARSE);
2533	if (line == NULL)
2534	break;
2535	/FALLTHRU/
2536	case COND_PARSE:
2537	efree ((Address) line);
2538	line = ParseReadLine();
2539	break;
2540	case COND_INVALID:
2541	if (For_Eval(line)) {
2542	int ok;
2543	efree(line);
2544	do {
2545	/*
2546	* Skip after the matching end
2547	*/
2548	line = ParseSkipLine(0);
2549	if (line == NULL) {
2550	Parse_Error (PARSE_FATAL,
2551	"Unexpected end of file in for loop.\n");
2552	break;
2553	}
2554	ok = For_Eval(line);
2555	efree(line);
2556	}
2557	while (ok);
2558	if (line != NULL)
2559	For_Run();
2560	line = ParseReadLine();
2561	}
2562	break;
2563	}
2564	}
2565	return (line);
2566
2567	} else {
2568	/*
2569	* Hit end-of-file, so return a NULL line to indicate this.
2570	*/
2571	return((char *)NULL);
2572	}
2573	}
2574
2575	/*-
2576	*-----------------------------------------------------------------------
2577	* ParseFinishLine --
2578	* Handle the end of a dependency group.
2579	*
2580	* Results:
2581	* Nothing.
2582	*
2583	* Side Effects:
2584	* inLine set FALSE. 'targets' list destroyed.
2585	*
2586	*-----------------------------------------------------------------------
2587	*/
2588	static void
2589	ParseFinishLine()
2590	{
2591	if (inLine) {
2592	Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL);
2593	Lst_Destroy (targets, ParseHasCommands);
2594	targets = NULL;
2595	inLine = FALSE;
2596	}
2597	}
2598
2599
2600	/*-
2601	*---------------------------------------------------------------------
2602	* Parse_File --
2603	* Parse a file into its component parts, incorporating it into the
2604	* current dependency graph. This is the main function and controls
2605	* almost every other function in this module
2606	*
2607	* Results:
2608	* None
2609	*
2610	* Side Effects:
2611	* Loads. Nodes are added to the list of all targets, nodes and links
2612	* are added to the dependency graph. etc. etc. etc.
2613	*---------------------------------------------------------------------
2614	*/
2615	void
2616	Parse_File(name, stream)
2617	char name; / the name of the file being read */
2618	FILE * stream; /* Stream open to makefile to parse */
2619	{
2620	register char cp, / pointer into the line */
2621	line; / the line we're working on */
2622
2623	inLine = FALSE;
2624	#if defined(USE_INLINEFILES)
2625	inInlineFile = FALSE;
2626	#endif
2627	fname = name;
2628	curFILE = stream;
2629	lineno = 0;
2630	fatals = 0;
2631
2632	do {
2633	while ((line = ParseReadLine ()) != NULL) {
2634	if (DEBUG(PARSE))
2635	printf("%s(%d): inLine=%d inInlineFile=%d\n%s\n", fname, lineno, inLine, inInlineFile, line);
2636	#ifdef NMAKE
2637	if (line == '.' \|\| line == '!') {
2638	#else
2639	if (*line == '.') {
2640	#endif
2641	/*
2642	* Lines that begin with the special character are either
2643	* include or undef directives.
2644	*/
2645	for (cp = line + 1; isspace (*cp); cp++) {
2646	continue;
2647	}
2648	if (strncmp (cp, "include", 7) == 0) {
2649	ParseDoInclude (cp + 7, *line);
2650	goto nextLine;
2651	} else if (strncmp (cp, "error", 5) == 0) {
2652	ParseDoError(cp + 5);
2653	goto nextLine;
2654	} else if (strncmp(cp, "undef", 5) == 0) {
2655	char *cp2;
2656	for (cp += 5; isspace((unsigned char) *cp); cp++) {
2657	continue;
2658	}
2659
2660	for (cp2 = cp; !isspace((unsigned char) *cp2) &&
2661	(*cp2 != '\0'); cp2++) {
2662	continue;
2663	}
2664
2665	*cp2 = '\0';
2666
2667	Var_Delete(cp, VAR_GLOBAL);
2668	goto nextLine;
2669	}
2670	}
2671
2672	#ifdef USE_INLINEFILES
2673	if (inInlineFile)
2674	{
2675	cp = line;
2676	if (*cp == '<' && cp[1] == '<')
2677	{
2678	inInlineFile = FALSE;
2679	for (cp = line + 2; isspace(*cp); cp++) {
2680	continue;
2681	}
2682	if (!cp \|\| cp == '#') { /* no flag */
2683	line[2] = '\0';
2684	cp = line;
2685	} else if (!strncmp(cp, "KEEP", 4) &&
2686	(!cp[4] \|\| isspace(cp[4]) \|\| cp[4] == '#')) {
2687	cp[4] = '\0';
2688	*--cp = '<';
2689	*--cp = '<';
2690	} else if (!strncmp(cp, "NOKEEP", 6) &&
2691	(!cp[6] \|\| isspace(cp[6]) \|\| cp[6] == '#')) {
2692	cp[6] = '\0';
2693	*--cp = '<';
2694	*--cp = '<';
2695	}
2696	else
2697	{
2698	Parse_Error(PARSE_FATAL, "Invalid termination of inline file \"%s\"", cp);
2699	cp = NULL;
2700	}
2701	}
2702	/* Append to last command */
2703	if (cp)
2704	{
2705	Lst_ForEach(targets, ParseAppendInline, cp);
2706	/Lst_AtEnd(targCmds, (ClientData) line); /
2707	}
2708	goto nextLine;
2709	}
2710	#endif
2711
2712	if (*line == '#') {
2713	/* If we're this far, the line must be a comment. */
2714	goto nextLine;
2715	}
2716
2717	if (*line == '\t') {
2718	/*
2719	* If a line starts with a tab, it can only hope to be
2720	* a creation command.
2721	*/
2722	#if !defined(POSIX) \|\| defined(USE_NO_STUPID_TABS)
2723	shellCommand:
2724	#endif
2725	for (cp = line + 1; isspace (*cp); cp++) {
2726	continue;
2727	}
2728	if (*cp) {
2729	if (inLine) {
2730	#ifdef USE_INLINEFILES
2731	if (ParseCmdIsComponent(cp, "<<"))
2732	{
2733	inInlineFile = TRUE;
2734	Lst_ForEach(targets, ParseAddCmd, estrdup(cp));
2735	/Lst_AtEnd(targCmds, (ClientData) line);/
2736	goto nextLine;
2737	}
2738	#endif
2739	/*
2740	* So long as it's not a blank line and we're actually
2741	* in a dependency spec, add the command to the list of
2742	* commands of all targets in the dependency spec
2743	*/
2744	Lst_ForEach (targets, ParseAddCmd, cp);
2745	/Lst_AtEnd(targCmds, (ClientData) line);/
2746	continue;
2747	} else {
2748	Parse_Error (PARSE_FATAL,
2749	"Unassociated shell command \"%s\"",
2750	cp);
2751	}
2752	}
2753	#ifdef SYSVINCLUDE
2754	} else if (strncmp (line, "include", 7) == 0 &&
2755	isspace((unsigned char) line[7]) &&
2756	strchr(line, ':') == NULL) {
2757	/*
2758	* It's an S3/S5-style "include".
2759	*/
2760	ParseTraditionalInclude (line + 7);
2761	goto nextLine;
2762	#endif
2763	} else if (Parse_IsVar (line)) {
2764	ParseFinishLine();
2765	Parse_DoVar (line, VAR_GLOBAL);
2766	} else {
2767	/*
2768	* We now know it's a dependency line so it needs to have all
2769	* variables expanded before being parsed. Tell the variable
2770	* module to complain if some variable is undefined...
2771	* To make life easier on novices, if the line is indented we
2772	* first make sure the line has a dependency operator in it.
2773	* If it doesn't have an operator and we're in a dependency
2774	* line's script, we assume it's actually a shell command
2775	* and add it to the current list of targets.
2776	*/
2777	#if !defined(POSIX) \|\| defined(USE_NO_STUPID_TABS)
2778	Boolean nonSpace = FALSE;
2779	#endif
2780
2781	cp = line;
2782	if (isspace((unsigned char) line[0])) {
2783	while ((cp != '\0') && isspace((unsigned char) cp)) {
2784	cp++;
2785	}
2786	if (*cp == '\0') {
2787	goto nextLine;
2788	}
2789	#if !defined(POSIX) \|\| defined(USE_NO_STUPID_TABS)
2790	while ((cp != ':') && (cp != '!') && (*cp != '\0')) {
2791	nonSpace = TRUE;
2792	cp++;
2793	}
2794	#endif
2795	}
2796
2797	#if !defined(POSIX) \|\| defined(USE_NO_STUPID_TABS)
2798	if (*cp == '\0') {
2799	if (inLine) {
2800	#if !defined(USE_NO_STUPID_TABS)
2801	Parse_Error (PARSE_WARNING,
2802	"Shell command needs a leading tab");
2803	#endif
2804	goto shellCommand;
2805	} else if (nonSpace) {
2806	Parse_Error (PARSE_FATAL, "Missing operator");
2807	}
2808	} else {
2809	#endif
2810	ParseFinishLine();
2811
2812	cp = Var_Subst (NULL, line, VAR_CMD, TRUE);
2813	efree (line);
2814	line = cp;
2815
2816	/*
2817	* Need a non-circular list for the target nodes
2818	*/
2819	if (targets)
2820	Lst_Destroy(targets, NOFREE);
2821
2822	targets = Lst_Init (FALSE);
2823	inLine = TRUE;
2824
2825	ParseDoDependency (line);
2826	#if !defined(POSIX) \|\| defined(USE_NO_STUPID_TABS)
2827	}
2828	#endif
2829	}
2830
2831	nextLine:
2832
2833	efree (line);
2834	}
2835	/*
2836	* Reached EOF, but it may be just EOF of an include file...
2837	*/
2838	} while (ParseEOF(1) == CONTINUE);
2839
2840	/*
2841	* Make sure conditionals are clean
2842	*/
2843	Cond_End();
2844
2845	if (fatals)
2846	errx(1, "fatal errors encountered -- cannot continue");
2847	}
2848
2849	/*-
2850	*---------------------------------------------------------------------
2851	* Parse_Init --
2852	* initialize the parsing module
2853	*
2854	* Results:
2855	* none
2856	*
2857	* Side Effects:
2858	* the parseIncPath list is initialized...
2859	*---------------------------------------------------------------------
2860	*/
2861	void
2862	Parse_Init ()
2863	{
2864	mainNode = NILGNODE;
2865	parseIncPath = Lst_Init (FALSE);
2866	sysIncPath = Lst_Init (FALSE);
2867	includes = Lst_Init (FALSE);
2868	/targCmds = Lst_Init (FALSE);/
2869	}
2870
2871	void
2872	Parse_End()
2873	{
2874	/Lst_Destroy(targCmds, (void () __P((ClientData))) efree);*/
2875	if (targets)
2876	Lst_Destroy(targets, NOFREE);
2877	Lst_Destroy(sysIncPath, Dir_Destroy);
2878	Lst_Destroy(parseIncPath, Dir_Destroy);
2879	Lst_Destroy(includes, NOFREE); /* Should be empty now */
2880	}
2881
2882
2883	/*-
2884	*-----------------------------------------------------------------------
2885	* Parse_MainName --
2886	* Return a Lst of the main target to create for main()'s sake. If
2887	* no such target exists, we Punt with an obnoxious error message.
2888	*
2889	* Results:
2890	* A Lst of the single node to create.
2891	*
2892	* Side Effects:
2893	* None.
2894	*
2895	*-----------------------------------------------------------------------
2896	*/
2897	Lst
2898	Parse_MainName()
2899	{
2900	Lst listmain; /* result list */
2901
2902	listmain = Lst_Init (FALSE);
2903
2904	if (mainNode == NILGNODE) {
2905	Punt ("no target to make.");
2906	/NOTREACHED/
2907	} else if (mainNode->type & OP_DOUBLEDEP) {
2908	(void) Lst_AtEnd (listmain, (ClientData)mainNode);
2909	Lst_Concat(listmain, mainNode->cohorts, LST_CONCNEW);
2910	}
2911	else
2912	(void) Lst_AtEnd (listmain, (ClientData)mainNode);
2913	return (listmain);
2914	}

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source: kBuild/trunk/src/kmk/parse.c@ 64

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