Annotation of src/usr.bin/make/parse.c, Revision 1.17
1.16 millert 1: /* $OpenBSD: parse.c,v 1.15 1997/07/25 21:05:35 mickey Exp $ */
1.13 millert 2: /* $NetBSD: parse.c,v 1.29 1997/03/10 21:20:04 christos Exp $ */
1.1 deraadt 3:
4: /*
1.11 millert 5: * Copyright (c) 1988, 1989, 1990, 1993
6: * The Regents of the University of California. All rights reserved.
1.1 deraadt 7: * Copyright (c) 1989 by Berkeley Softworks
8: * All rights reserved.
9: *
10: * This code is derived from software contributed to Berkeley by
11: * Adam de Boor.
12: *
13: * Redistribution and use in source and binary forms, with or without
14: * modification, are permitted provided that the following conditions
15: * are met:
16: * 1. Redistributions of source code must retain the above copyright
17: * notice, this list of conditions and the following disclaimer.
18: * 2. Redistributions in binary form must reproduce the above copyright
19: * notice, this list of conditions and the following disclaimer in the
20: * documentation and/or other materials provided with the distribution.
21: * 3. All advertising materials mentioning features or use of this software
22: * must display the following acknowledgement:
23: * This product includes software developed by the University of
24: * California, Berkeley and its contributors.
25: * 4. Neither the name of the University nor the names of its contributors
26: * may be used to endorse or promote products derived from this software
27: * without specific prior written permission.
28: *
29: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39: * SUCH DAMAGE.
40: */
41:
42: #ifndef lint
43: #if 0
1.11 millert 44: static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94";
1.1 deraadt 45: #else
1.16 millert 46: static char rcsid[] = "$OpenBSD: parse.c,v 1.15 1997/07/25 21:05:35 mickey Exp $";
1.1 deraadt 47: #endif
48: #endif /* not lint */
49:
50: /*-
51: * parse.c --
52: * Functions to parse a makefile.
53: *
54: * One function, Parse_Init, must be called before any functions
55: * in this module are used. After that, the function Parse_File is the
56: * main entry point and controls most of the other functions in this
57: * module.
58: *
59: * Most important structures are kept in Lsts. Directories for
60: * the #include "..." function are kept in the 'parseIncPath' Lst, while
61: * those for the #include <...> are kept in the 'sysIncPath' Lst. The
62: * targets currently being defined are kept in the 'targets' Lst.
63: *
64: * The variables 'fname' and 'lineno' are used to track the name
65: * of the current file and the line number in that file so that error
66: * messages can be more meaningful.
67: *
68: * Interface:
69: * Parse_Init Initialization function which must be
70: * called before anything else in this module
71: * is used.
72: *
73: * Parse_End Cleanup the module
74: *
75: * Parse_File Function used to parse a makefile. It must
76: * be given the name of the file, which should
77: * already have been opened, and a function
78: * to call to read a character from the file.
79: *
80: * Parse_IsVar Returns TRUE if the given line is a
81: * variable assignment. Used by MainParseArgs
82: * to determine if an argument is a target
83: * or a variable assignment. Used internally
84: * for pretty much the same thing...
85: *
86: * Parse_Error Function called when an error occurs in
87: * parsing. Used by the variable and
88: * conditional modules.
89: * Parse_MainName Returns a Lst of the main target to create.
90: */
91:
1.15 mickey 92: #ifdef __STDC__
1.1 deraadt 93: #include <stdarg.h>
94: #else
95: #include <varargs.h>
96: #endif
97: #include <stdio.h>
98: #include <ctype.h>
99: #include <errno.h>
100: #include "make.h"
101: #include "hash.h"
102: #include "dir.h"
103: #include "job.h"
104: #include "buf.h"
105: #include "pathnames.h"
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: typedef struct {
119: char *str;
120: char *ptr;
121: } PTR;
122:
123: static char *fname; /* name of current file (for errors) */
124: static int lineno; /* line number in current file */
125: static FILE *curFILE = NULL; /* current makefile */
126:
127: static PTR *curPTR = NULL; /* current makefile */
128:
129: static int fatals = 0;
130:
131: static GNode *mainNode; /* The main target to create. This is the
132: * first target on the first dependency
133: * line in the first makefile */
134: /*
135: * Definitions for handling #include specifications
136: */
137: typedef struct IFile {
138: char *fname; /* name of previous file */
139: int lineno; /* saved line number */
140: FILE * F; /* the open stream */
141: PTR * p; /* the char pointer */
142: } IFile;
143:
144: static Lst includes; /* stack of IFiles generated by
145: * #includes */
146: Lst parseIncPath; /* list of directories for "..." includes */
147: Lst sysIncPath; /* list of directories for <...> includes */
148:
149: /*-
150: * specType contains the SPECial TYPE of the current target. It is
151: * Not if the target is unspecial. If it *is* special, however, the children
152: * are linked as children of the parent but not vice versa. This variable is
153: * set in ParseDoDependency
154: */
155: typedef enum {
156: Begin, /* .BEGIN */
157: Default, /* .DEFAULT */
158: End, /* .END */
159: Ignore, /* .IGNORE */
160: Includes, /* .INCLUDES */
161: Interrupt, /* .INTERRUPT */
162: Libs, /* .LIBS */
163: MFlags, /* .MFLAGS or .MAKEFLAGS */
164: Main, /* .MAIN and we don't have anything user-specified to
165: * make */
166: NoExport, /* .NOEXPORT */
1.17 ! espie 167: NoPath, /* .NOPATH */
1.1 deraadt 168: Not, /* Not special */
169: NotParallel, /* .NOTPARALELL */
170: Null, /* .NULL */
171: Order, /* .ORDER */
1.3 deraadt 172: Parallel, /* .PARALLEL */
1.1 deraadt 173: ExPath, /* .PATH */
1.7 niklas 174: Phony, /* .PHONY */
1.1 deraadt 175: Precious, /* .PRECIOUS */
176: ExShell, /* .SHELL */
177: Silent, /* .SILENT */
178: SingleShell, /* .SINGLESHELL */
179: Suffixes, /* .SUFFIXES */
1.3 deraadt 180: Wait, /* .WAIT */
1.1 deraadt 181: Attribute /* Generic attribute */
182: } ParseSpecial;
183:
184: static ParseSpecial specType;
1.3 deraadt 185: static int waiting;
1.1 deraadt 186:
187: /*
188: * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER
189: * seen, then set to each successive source on the line.
190: */
191: static GNode *predecessor;
192:
193: /*
194: * The parseKeywords table is searched using binary search when deciding
195: * if a target or source is special. The 'spec' field is the ParseSpecial
196: * type of the keyword ("Not" if the keyword isn't special as a target) while
197: * the 'op' field is the operator to apply to the list of targets if the
198: * keyword is used as a source ("0" if the keyword isn't special as a source)
199: */
200: static struct {
201: char *name; /* Name of keyword */
202: ParseSpecial spec; /* Type when used as a target */
203: int op; /* Operator when used as a source */
204: } parseKeywords[] = {
205: { ".BEGIN", Begin, 0 },
206: { ".DEFAULT", Default, 0 },
207: { ".END", End, 0 },
208: { ".EXEC", Attribute, OP_EXEC },
209: { ".IGNORE", Ignore, OP_IGNORE },
210: { ".INCLUDES", Includes, 0 },
211: { ".INTERRUPT", Interrupt, 0 },
212: { ".INVISIBLE", Attribute, OP_INVISIBLE },
213: { ".JOIN", Attribute, OP_JOIN },
214: { ".LIBS", Libs, 0 },
1.13 millert 215: { ".MADE", Attribute, OP_MADE },
1.1 deraadt 216: { ".MAIN", Main, 0 },
217: { ".MAKE", Attribute, OP_MAKE },
218: { ".MAKEFLAGS", MFlags, 0 },
219: { ".MFLAGS", MFlags, 0 },
1.17 ! espie 220: #if 0 /* basic scaffolding for NOPATH, not working yet */
! 221: { ".NOPATH", NoPath, OP_NOPATH },
! 222: #endif
1.1 deraadt 223: { ".NOTMAIN", Attribute, OP_NOTMAIN },
224: { ".NOTPARALLEL", NotParallel, 0 },
1.3 deraadt 225: { ".NO_PARALLEL", NotParallel, 0 },
1.1 deraadt 226: { ".NULL", Null, 0 },
227: { ".OPTIONAL", Attribute, OP_OPTIONAL },
228: { ".ORDER", Order, 0 },
1.3 deraadt 229: { ".PARALLEL", Parallel, 0 },
1.1 deraadt 230: { ".PATH", ExPath, 0 },
1.7 niklas 231: { ".PHONY", Phony, OP_PHONY },
1.1 deraadt 232: { ".PRECIOUS", Precious, OP_PRECIOUS },
233: { ".RECURSIVE", Attribute, OP_MAKE },
234: { ".SHELL", ExShell, 0 },
235: { ".SILENT", Silent, OP_SILENT },
236: { ".SINGLESHELL", SingleShell, 0 },
237: { ".SUFFIXES", Suffixes, 0 },
238: { ".USE", Attribute, OP_USE },
1.3 deraadt 239: { ".WAIT", Wait, 0 },
1.1 deraadt 240: };
241:
1.17 ! espie 242: static void ParseErrorInternal __P((char *, size_t, int, char *, ...));
! 243: static void ParseVErrorInternal __P((char *, size_t, int, char *, va_list));
1.1 deraadt 244: static int ParseFindKeyword __P((char *));
245: static int ParseLinkSrc __P((ClientData, ClientData));
246: static int ParseDoOp __P((ClientData, ClientData));
1.3 deraadt 247: static int ParseAddDep __P((ClientData, ClientData));
248: static void ParseDoSrc __P((int, char *, Lst));
1.1 deraadt 249: static int ParseFindMain __P((ClientData, ClientData));
250: static int ParseAddDir __P((ClientData, ClientData));
251: static int ParseClearPath __P((ClientData, ClientData));
252: static void ParseDoDependency __P((char *));
253: static int ParseAddCmd __P((ClientData, ClientData));
254: static int ParseReadc __P((void));
255: static void ParseUnreadc __P((int));
256: static void ParseHasCommands __P((ClientData));
257: static void ParseDoInclude __P((char *));
258: #ifdef SYSVINCLUDE
259: static void ParseTraditionalInclude __P((char *));
260: #endif
261: static int ParseEOF __P((int));
262: static char *ParseReadLine __P((void));
263: static char *ParseSkipLine __P((int));
264: static void ParseFinishLine __P((void));
265:
266: /*-
267: *----------------------------------------------------------------------
268: * ParseFindKeyword --
269: * Look in the table of keywords for one matching the given string.
270: *
271: * Results:
272: * The index of the keyword, or -1 if it isn't there.
273: *
274: * Side Effects:
275: * None
276: *----------------------------------------------------------------------
277: */
278: static int
279: ParseFindKeyword (str)
280: char *str; /* String to find */
281: {
282: register int start,
283: end,
284: cur;
285: register int diff;
1.11 millert 286:
1.1 deraadt 287: start = 0;
288: end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1;
289:
290: do {
291: cur = start + ((end - start) / 2);
292: diff = strcmp (str, parseKeywords[cur].name);
293:
294: if (diff == 0) {
295: return (cur);
296: } else if (diff < 0) {
297: end = cur - 1;
298: } else {
299: start = cur + 1;
300: }
301: } while (start <= end);
302: return (-1);
303: }
304:
305: /*-
1.17 ! espie 306: * ParseVErrorInternal --
1.1 deraadt 307: * Error message abort function for parsing. Prints out the context
308: * of the error (line number and file) as well as the message with
309: * two optional arguments.
310: *
311: * Results:
312: * None
313: *
314: * Side Effects:
315: * "fatals" is incremented if the level is PARSE_FATAL.
316: */
317: /* VARARGS */
1.17 ! espie 318: static void
! 319: #ifdef __STDC__
! 320: ParseVErrorInternal(char *cfname, size_t clineno, int type, char *fmt,
! 321: va_list ap)
! 322: #else
! 323: ParseVErrorInternal(va_alist)
! 324: va_dcl
! 325: #endif
! 326: {
! 327: (void)fprintf(stderr, "\"%s\", line %d: ", cfname, (int) clineno);
! 328: if (type == PARSE_WARNING)
! 329: (void)fprintf(stderr, "warning: ");
! 330: (void)vfprintf(stderr, fmt, ap);
! 331: va_end(ap);
! 332: (void)fprintf(stderr, "\n");
! 333: (void)fflush(stderr);
! 334: if (type == PARSE_FATAL)
! 335: fatals += 1;
! 336: }
! 337:
! 338: /*-
! 339: * ParseErrorInternal --
! 340: * Error function
! 341: *
! 342: * Results:
! 343: * None
! 344: *
! 345: * Side Effects:
! 346: * None
! 347: */
! 348: /* VARARGS */
! 349: static void
! 350: #ifdef __STDC__
! 351: ParseErrorInternal(char *cfname, size_t clineno, int type, char *fmt, ...)
! 352: #else
! 353: ParseErrorInternal(va_alist)
! 354: va_dcl
! 355: #endif
! 356: {
! 357: va_list ap;
! 358: #ifdef __STDC__
! 359: va_start(ap, fmt);
! 360: #else
! 361: int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */
! 362: char *fmt;
! 363: char *cfname;
! 364: size_t clineno;
! 365:
! 366: va_start(ap);
! 367: cfname = va_arg(ap, char *);
! 368: clineno = va_arg(ap, size_t);
! 369: type = va_arg(ap, int);
! 370: fmt = va_arg(ap, char *);
! 371: #endif
! 372:
! 373: ParseVErrorInternal(cfname, clineno, type, fmt, ap);
! 374: va_end(ap);
! 375: }
! 376:
! 377: /*-
! 378: * Parse_Error --
! 379: * External interface to ParseErrorInternal; uses the default filename
! 380: * Line number.
! 381: *
! 382: * Results:
! 383: * None
! 384: *
! 385: * Side Effects:
! 386: * None
! 387: */
! 388: /* VARARGS */
1.1 deraadt 389: void
1.15 mickey 390: #ifdef __STDC__
1.1 deraadt 391: Parse_Error(int type, char *fmt, ...)
392: #else
393: Parse_Error(va_alist)
394: va_dcl
395: #endif
396: {
397: va_list ap;
1.15 mickey 398: #ifdef __STDC__
1.1 deraadt 399: va_start(ap, fmt);
400: #else
401: int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */
402: char *fmt;
403:
404: va_start(ap);
405: type = va_arg(ap, int);
406: fmt = va_arg(ap, char *);
407: #endif
408:
1.17 ! espie 409: ParseVErrorInternal(fname, lineno, type, fmt, ap);
1.1 deraadt 410: }
411:
412: /*-
413: *---------------------------------------------------------------------
414: * ParseLinkSrc --
415: * Link the parent node to its new child. Used in a Lst_ForEach by
416: * ParseDoDependency. If the specType isn't 'Not', the parent
417: * isn't linked as a parent of the child.
418: *
419: * Results:
420: * Always = 0
421: *
422: * Side Effects:
423: * New elements are added to the parents list of cgn and the
424: * children list of cgn. the unmade field of pgn is updated
425: * to reflect the additional child.
426: *---------------------------------------------------------------------
427: */
428: static int
429: ParseLinkSrc (pgnp, cgnp)
430: ClientData pgnp; /* The parent node */
431: ClientData cgnp; /* The child node */
432: {
433: GNode *pgn = (GNode *) pgnp;
434: GNode *cgn = (GNode *) cgnp;
435: if (Lst_Member (pgn->children, (ClientData)cgn) == NILLNODE) {
436: (void)Lst_AtEnd (pgn->children, (ClientData)cgn);
437: if (specType == Not) {
438: (void)Lst_AtEnd (cgn->parents, (ClientData)pgn);
439: }
440: pgn->unmade += 1;
441: }
442: return (0);
443: }
444:
445: /*-
446: *---------------------------------------------------------------------
447: * ParseDoOp --
448: * Apply the parsed operator to the given target node. Used in a
449: * Lst_ForEach call by ParseDoDependency once all targets have
450: * been found and their operator parsed. If the previous and new
451: * operators are incompatible, a major error is taken.
452: *
453: * Results:
454: * Always 0
455: *
456: * Side Effects:
457: * The type field of the node is altered to reflect any new bits in
458: * the op.
459: *---------------------------------------------------------------------
460: */
461: static int
462: ParseDoOp (gnp, opp)
463: ClientData gnp; /* The node to which the operator is to be
464: * applied */
465: ClientData opp; /* The operator to apply */
466: {
467: GNode *gn = (GNode *) gnp;
468: int op = *(int *) opp;
469: /*
470: * If the dependency mask of the operator and the node don't match and
471: * the node has actually had an operator applied to it before, and
1.11 millert 472: * the operator actually has some dependency information in it, complain.
1.1 deraadt 473: */
474: if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) &&
475: !OP_NOP(gn->type) && !OP_NOP(op))
476: {
477: Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name);
478: return (1);
479: }
480:
481: if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) {
482: /*
483: * If the node was the object of a :: operator, we need to create a
484: * new instance of it for the children and commands on this dependency
485: * line. The new instance is placed on the 'cohorts' list of the
486: * initial one (note the initial one is not on its own cohorts list)
487: * and the new instance is linked to all parents of the initial
488: * instance.
489: */
490: register GNode *cohort;
491: LstNode ln;
1.11 millert 492:
1.1 deraadt 493: cohort = Targ_NewGN(gn->name);
494: /*
495: * Duplicate links to parents so graph traversal is simple. Perhaps
496: * some type bits should be duplicated?
497: *
498: * Make the cohort invisible as well to avoid duplicating it into
499: * other variables. True, parents of this target won't tend to do
500: * anything with their local variables, but better safe than
501: * sorry.
502: */
503: Lst_ForEach(gn->parents, ParseLinkSrc, (ClientData)cohort);
504: cohort->type = OP_DOUBLEDEP|OP_INVISIBLE;
505: (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort);
506:
507: /*
508: * Replace the node in the targets list with the new copy
509: */
510: ln = Lst_Member(targets, (ClientData)gn);
511: Lst_Replace(ln, (ClientData)cohort);
512: gn = cohort;
513: }
514: /*
515: * We don't want to nuke any previous flags (whatever they were) so we
1.11 millert 516: * just OR the new operator into the old
1.1 deraadt 517: */
518: gn->type |= op;
519:
520: return (0);
521: }
522:
1.11 millert 523: /*-
1.3 deraadt 524: *---------------------------------------------------------------------
525: * ParseAddDep --
526: * Check if the pair of GNodes given needs to be synchronized.
527: * This has to be when two nodes are on different sides of a
528: * .WAIT directive.
529: *
530: * Results:
531: * Returns 1 if the two targets need to be ordered, 0 otherwise.
532: * If it returns 1, the search can stop
533: *
534: * Side Effects:
535: * A dependency can be added between the two nodes.
1.11 millert 536: *
1.3 deraadt 537: *---------------------------------------------------------------------
538: */
1.13 millert 539: static int
1.3 deraadt 540: ParseAddDep(pp, sp)
541: ClientData pp;
542: ClientData sp;
543: {
544: GNode *p = (GNode *) pp;
545: GNode *s = (GNode *) sp;
546:
547: if (p->order < s->order) {
548: /*
549: * XXX: This can cause loops, and loops can cause unmade targets,
550: * but checking is tedious, and the debugging output can show the
551: * problem
552: */
553: (void)Lst_AtEnd(p->successors, (ClientData)s);
554: (void)Lst_AtEnd(s->preds, (ClientData)p);
555: return 0;
556: }
557: else
558: return 1;
559: }
560:
561:
1.1 deraadt 562: /*-
563: *---------------------------------------------------------------------
564: * ParseDoSrc --
565: * Given the name of a source, figure out if it is an attribute
566: * and apply it to the targets if it is. Else decide if there is
567: * some attribute which should be applied *to* the source because
568: * of some special target and apply it if so. Otherwise, make the
569: * source be a child of the targets in the list 'targets'
570: *
571: * Results:
572: * None
573: *
574: * Side Effects:
575: * Operator bits may be added to the list of targets or to the source.
576: * The targets may have a new source added to their lists of children.
577: *---------------------------------------------------------------------
578: */
579: static void
1.3 deraadt 580: ParseDoSrc (tOp, src, allsrc)
1.1 deraadt 581: int tOp; /* operator (if any) from special targets */
582: char *src; /* name of the source to handle */
1.3 deraadt 583: Lst allsrc; /* List of all sources to wait for */
584:
1.1 deraadt 585: {
1.3 deraadt 586: GNode *gn = NULL;
1.1 deraadt 587:
588: if (*src == '.' && isupper (src[1])) {
589: int keywd = ParseFindKeyword(src);
590: if (keywd != -1) {
1.3 deraadt 591: int op = parseKeywords[keywd].op;
592: if (op != 0) {
593: Lst_ForEach (targets, ParseDoOp, (ClientData)&op);
594: return;
595: }
596: if (parseKeywords[keywd].spec == Wait) {
597: waiting++;
598: return;
599: }
1.1 deraadt 600: }
601: }
1.3 deraadt 602:
603: switch (specType) {
604: case Main:
1.1 deraadt 605: /*
606: * If we have noted the existence of a .MAIN, it means we need
607: * to add the sources of said target to the list of things
608: * to create. The string 'src' is likely to be free, so we
609: * must make a new copy of it. Note that this will only be
610: * invoked if the user didn't specify a target on the command
611: * line. This is to allow #ifmake's to succeed, or something...
612: */
1.9 briggs 613: (void) Lst_AtEnd (create, (ClientData)estrdup(src));
1.1 deraadt 614: /*
615: * Add the name to the .TARGETS variable as well, so the user cna
616: * employ that, if desired.
617: */
618: Var_Append(".TARGETS", src, VAR_GLOBAL);
1.3 deraadt 619: return;
620:
621: case Order:
1.1 deraadt 622: /*
623: * Create proper predecessor/successor links between the previous
624: * source and the current one.
625: */
626: gn = Targ_FindNode(src, TARG_CREATE);
627: if (predecessor != NILGNODE) {
628: (void)Lst_AtEnd(predecessor->successors, (ClientData)gn);
629: (void)Lst_AtEnd(gn->preds, (ClientData)predecessor);
630: }
631: /*
632: * The current source now becomes the predecessor for the next one.
633: */
634: predecessor = gn;
1.3 deraadt 635: break;
636:
637: default:
1.1 deraadt 638: /*
639: * If the source is not an attribute, we need to find/create
640: * a node for it. After that we can apply any operator to it
641: * from a special target or link it to its parents, as
642: * appropriate.
643: *
644: * In the case of a source that was the object of a :: operator,
645: * the attribute is applied to all of its instances (as kept in
646: * the 'cohorts' list of the node) or all the cohorts are linked
647: * to all the targets.
648: */
649: gn = Targ_FindNode (src, TARG_CREATE);
650: if (tOp) {
651: gn->type |= tOp;
652: } else {
653: Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn);
654: }
655: if ((gn->type & OP_OPMASK) == OP_DOUBLEDEP) {
656: register GNode *cohort;
657: register LstNode ln;
658:
659: for (ln=Lst_First(gn->cohorts); ln != NILLNODE; ln = Lst_Succ(ln)){
660: cohort = (GNode *)Lst_Datum(ln);
661: if (tOp) {
662: cohort->type |= tOp;
663: } else {
664: Lst_ForEach(targets, ParseLinkSrc, (ClientData)cohort);
665: }
666: }
667: }
1.3 deraadt 668: break;
669: }
670:
671: gn->order = waiting;
672: (void)Lst_AtEnd(allsrc, (ClientData)gn);
673: if (waiting) {
674: Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn);
1.1 deraadt 675: }
676: }
677:
678: /*-
679: *-----------------------------------------------------------------------
680: * ParseFindMain --
681: * Find a real target in the list and set it to be the main one.
682: * Called by ParseDoDependency when a main target hasn't been found
683: * yet.
684: *
685: * Results:
686: * 0 if main not found yet, 1 if it is.
687: *
688: * Side Effects:
689: * mainNode is changed and Targ_SetMain is called.
690: *
691: *-----------------------------------------------------------------------
692: */
693: static int
694: ParseFindMain(gnp, dummy)
695: ClientData gnp; /* Node to examine */
696: ClientData dummy;
697: {
698: GNode *gn = (GNode *) gnp;
1.17 ! espie 699: if ((gn->type & OP_NOTARGET) == 0) {
1.1 deraadt 700: mainNode = gn;
701: Targ_SetMain(gn);
702: return (dummy ? 1 : 1);
703: } else {
704: return (dummy ? 0 : 0);
705: }
706: }
707:
708: /*-
709: *-----------------------------------------------------------------------
710: * ParseAddDir --
711: * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going
712: *
713: * Results:
714: * === 0
715: *
716: * Side Effects:
717: * See Dir_AddDir.
718: *
719: *-----------------------------------------------------------------------
720: */
721: static int
722: ParseAddDir(path, name)
723: ClientData path;
724: ClientData name;
725: {
726: Dir_AddDir((Lst) path, (char *) name);
727: return(0);
728: }
729:
730: /*-
731: *-----------------------------------------------------------------------
732: * ParseClearPath --
733: * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going
734: *
735: * Results:
736: * === 0
737: *
738: * Side Effects:
739: * See Dir_ClearPath
740: *
741: *-----------------------------------------------------------------------
742: */
743: static int
744: ParseClearPath(path, dummy)
745: ClientData path;
746: ClientData dummy;
747: {
748: Dir_ClearPath((Lst) path);
749: return(dummy ? 0 : 0);
750: }
751:
752: /*-
753: *---------------------------------------------------------------------
754: * ParseDoDependency --
755: * Parse the dependency line in line.
756: *
757: * Results:
758: * None
759: *
760: * Side Effects:
761: * The nodes of the sources are linked as children to the nodes of the
762: * targets. Some nodes may be created.
763: *
764: * We parse a dependency line by first extracting words from the line and
765: * finding nodes in the list of all targets with that name. This is done
766: * until a character is encountered which is an operator character. Currently
767: * these are only ! and :. At this point the operator is parsed and the
768: * pointer into the line advanced until the first source is encountered.
769: * The parsed operator is applied to each node in the 'targets' list,
770: * which is where the nodes found for the targets are kept, by means of
771: * the ParseDoOp function.
772: * The sources are read in much the same way as the targets were except
773: * that now they are expanded using the wildcarding scheme of the C-Shell
774: * and all instances of the resulting words in the list of all targets
775: * are found. Each of the resulting nodes is then linked to each of the
776: * targets as one of its children.
777: * Certain targets are handled specially. These are the ones detailed
778: * by the specType variable.
779: * The storing of transformation rules is also taken care of here.
780: * A target is recognized as a transformation rule by calling
781: * Suff_IsTransform. If it is a transformation rule, its node is gotten
782: * from the suffix module via Suff_AddTransform rather than the standard
783: * Targ_FindNode in the target module.
784: *---------------------------------------------------------------------
785: */
786: static void
787: ParseDoDependency (line)
788: char *line; /* the line to parse */
789: {
790: char *cp; /* our current position */
791: GNode *gn; /* a general purpose temporary node */
792: int op; /* the operator on the line */
793: char savec; /* a place to save a character */
794: Lst paths; /* List of search paths to alter when parsing
795: * a list of .PATH targets */
796: int tOp; /* operator from special target */
1.3 deraadt 797: Lst sources; /* list of archive source names after
798: * expansion */
1.1 deraadt 799: Lst curTargs; /* list of target names to be found and added
800: * to the targets list */
1.3 deraadt 801: Lst curSrcs; /* list of sources in order */
1.1 deraadt 802:
803: tOp = 0;
804:
805: specType = Not;
1.3 deraadt 806: waiting = 0;
1.1 deraadt 807: paths = (Lst)NULL;
808:
809: curTargs = Lst_Init(FALSE);
1.3 deraadt 810: curSrcs = Lst_Init(FALSE);
1.11 millert 811:
1.1 deraadt 812: do {
813: for (cp = line;
814: *cp && !isspace (*cp) &&
815: (*cp != '!') && (*cp != ':') && (*cp != '(');
816: cp++)
817: {
818: if (*cp == '$') {
819: /*
820: * Must be a dynamic source (would have been expanded
821: * otherwise), so call the Var module to parse the puppy
822: * so we can safely advance beyond it...There should be
823: * no errors in this, as they would have been discovered
824: * in the initial Var_Subst and we wouldn't be here.
825: */
826: int length;
827: Boolean freeIt;
828: char *result;
829:
830: result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt);
831:
832: if (freeIt) {
833: free(result);
834: }
835: cp += length-1;
836: }
837: continue;
838: }
839: if (*cp == '(') {
840: /*
841: * Archives must be handled specially to make sure the OP_ARCHV
842: * flag is set in their 'type' field, for one thing, and because
843: * things like "archive(file1.o file2.o file3.o)" are permissible.
844: * Arch_ParseArchive will set 'line' to be the first non-blank
845: * after the archive-spec. It creates/finds nodes for the members
846: * and places them on the given list, returning SUCCESS if all
847: * went well and FAILURE if there was an error in the
848: * specification. On error, line should remain untouched.
849: */
850: if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) {
851: Parse_Error (PARSE_FATAL,
852: "Error in archive specification: \"%s\"", line);
853: return;
854: } else {
855: continue;
856: }
857: }
858: savec = *cp;
1.11 millert 859:
1.1 deraadt 860: if (!*cp) {
861: /*
862: * Ending a dependency line without an operator is a Bozo
1.11 millert 863: * no-no
1.1 deraadt 864: */
865: Parse_Error (PARSE_FATAL, "Need an operator");
866: return;
867: }
868: *cp = '\0';
869: /*
870: * Have a word in line. See if it's a special target and set
871: * specType to match it.
872: */
873: if (*line == '.' && isupper (line[1])) {
874: /*
875: * See if the target is a special target that must have it
1.11 millert 876: * or its sources handled specially.
1.1 deraadt 877: */
878: int keywd = ParseFindKeyword(line);
879: if (keywd != -1) {
880: if (specType == ExPath && parseKeywords[keywd].spec != ExPath) {
881: Parse_Error(PARSE_FATAL, "Mismatched special targets");
882: return;
883: }
1.11 millert 884:
1.1 deraadt 885: specType = parseKeywords[keywd].spec;
886: tOp = parseKeywords[keywd].op;
887:
888: /*
889: * Certain special targets have special semantics:
890: * .PATH Have to set the dirSearchPath
891: * variable too
892: * .MAIN Its sources are only used if
893: * nothing has been specified to
894: * create.
895: * .DEFAULT Need to create a node to hang
896: * commands on, but we don't want
897: * it in the graph, nor do we want
898: * it to be the Main Target, so we
899: * create it, set OP_NOTMAIN and
900: * add it to the list, setting
901: * DEFAULT to the new node for
902: * later use. We claim the node is
903: * A transformation rule to make
904: * life easier later, when we'll
905: * use Make_HandleUse to actually
906: * apply the .DEFAULT commands.
1.7 niklas 907: * .PHONY The list of targets
1.17 ! espie 908: * .NOPATH Don't search for file in the path
1.1 deraadt 909: * .BEGIN
910: * .END
911: * .INTERRUPT Are not to be considered the
912: * main target.
913: * .NOTPARALLEL Make only one target at a time.
914: * .SINGLESHELL Create a shell for each command.
915: * .ORDER Must set initial predecessor to NIL
916: */
917: switch (specType) {
918: case ExPath:
919: if (paths == NULL) {
920: paths = Lst_Init(FALSE);
921: }
922: (void)Lst_AtEnd(paths, (ClientData)dirSearchPath);
923: break;
924: case Main:
925: if (!Lst_IsEmpty(create)) {
926: specType = Not;
927: }
928: break;
929: case Begin:
930: case End:
931: case Interrupt:
932: gn = Targ_FindNode(line, TARG_CREATE);
933: gn->type |= OP_NOTMAIN;
934: (void)Lst_AtEnd(targets, (ClientData)gn);
935: break;
936: case Default:
937: gn = Targ_NewGN(".DEFAULT");
938: gn->type |= (OP_NOTMAIN|OP_TRANSFORM);
939: (void)Lst_AtEnd(targets, (ClientData)gn);
940: DEFAULT = gn;
941: break;
942: case NotParallel:
943: {
944: extern int maxJobs;
1.11 millert 945:
1.1 deraadt 946: maxJobs = 1;
947: break;
948: }
949: case SingleShell:
950: compatMake = 1;
951: break;
952: case Order:
953: predecessor = NILGNODE;
954: break;
955: default:
956: break;
957: }
958: } else if (strncmp (line, ".PATH", 5) == 0) {
959: /*
960: * .PATH<suffix> has to be handled specially.
961: * Call on the suffix module to give us a path to
962: * modify.
963: */
964: Lst path;
1.11 millert 965:
1.1 deraadt 966: specType = ExPath;
967: path = Suff_GetPath (&line[5]);
968: if (path == NILLST) {
969: Parse_Error (PARSE_FATAL,
970: "Suffix '%s' not defined (yet)",
971: &line[5]);
972: return;
973: } else {
974: if (paths == (Lst)NULL) {
975: paths = Lst_Init(FALSE);
976: }
977: (void)Lst_AtEnd(paths, (ClientData)path);
978: }
979: }
980: }
1.11 millert 981:
1.1 deraadt 982: /*
983: * Have word in line. Get or create its node and stick it at
1.11 millert 984: * the end of the targets list
1.1 deraadt 985: */
986: if ((specType == Not) && (*line != '\0')) {
987: if (Dir_HasWildcards(line)) {
988: /*
989: * Targets are to be sought only in the current directory,
990: * so create an empty path for the thing. Note we need to
991: * use Dir_Destroy in the destruction of the path as the
992: * Dir module could have added a directory to the path...
993: */
994: Lst emptyPath = Lst_Init(FALSE);
1.11 millert 995:
1.1 deraadt 996: Dir_Expand(line, emptyPath, curTargs);
1.11 millert 997:
1.1 deraadt 998: Lst_Destroy(emptyPath, Dir_Destroy);
999: } else {
1000: /*
1001: * No wildcards, but we want to avoid code duplication,
1002: * so create a list with the word on it.
1003: */
1004: (void)Lst_AtEnd(curTargs, (ClientData)line);
1005: }
1.11 millert 1006:
1.1 deraadt 1007: while(!Lst_IsEmpty(curTargs)) {
1008: char *targName = (char *)Lst_DeQueue(curTargs);
1.11 millert 1009:
1.1 deraadt 1010: if (!Suff_IsTransform (targName)) {
1011: gn = Targ_FindNode (targName, TARG_CREATE);
1012: } else {
1013: gn = Suff_AddTransform (targName);
1014: }
1.11 millert 1015:
1.16 millert 1016: if (gn != NULL)
1017: (void)Lst_AtEnd (targets, (ClientData)gn);
1.1 deraadt 1018: }
1019: } else if (specType == ExPath && *line != '.' && *line != '\0') {
1020: Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line);
1021: }
1.11 millert 1022:
1.1 deraadt 1023: *cp = savec;
1024: /*
1025: * If it is a special type and not .PATH, it's the only target we
1026: * allow on this line...
1027: */
1028: if (specType != Not && specType != ExPath) {
1029: Boolean warn = FALSE;
1.11 millert 1030:
1.1 deraadt 1031: while ((*cp != '!') && (*cp != ':') && *cp) {
1032: if (*cp != ' ' && *cp != '\t') {
1033: warn = TRUE;
1034: }
1035: cp++;
1036: }
1037: if (warn) {
1038: Parse_Error(PARSE_WARNING, "Extra target ignored");
1039: }
1040: } else {
1041: while (*cp && isspace (*cp)) {
1042: cp++;
1043: }
1044: }
1045: line = cp;
1046: } while ((*line != '!') && (*line != ':') && *line);
1047:
1048: /*
1049: * Don't need the list of target names anymore...
1050: */
1051: Lst_Destroy(curTargs, NOFREE);
1052:
1053: if (!Lst_IsEmpty(targets)) {
1054: switch(specType) {
1055: default:
1056: Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored");
1057: break;
1058: case Default:
1059: case Begin:
1060: case End:
1061: case Interrupt:
1062: /*
1063: * These four create nodes on which to hang commands, so
1064: * targets shouldn't be empty...
1065: */
1066: case Not:
1067: /*
1068: * Nothing special here -- targets can be empty if it wants.
1069: */
1070: break;
1071: }
1072: }
1073:
1074: /*
1075: * Have now parsed all the target names. Must parse the operator next. The
1076: * result is left in op .
1077: */
1078: if (*cp == '!') {
1079: op = OP_FORCE;
1080: } else if (*cp == ':') {
1081: if (cp[1] == ':') {
1082: op = OP_DOUBLEDEP;
1083: cp++;
1084: } else {
1085: op = OP_DEPENDS;
1086: }
1087: } else {
1088: Parse_Error (PARSE_FATAL, "Missing dependency operator");
1089: return;
1090: }
1091:
1092: cp++; /* Advance beyond operator */
1093:
1094: Lst_ForEach (targets, ParseDoOp, (ClientData)&op);
1095:
1096: /*
1.11 millert 1097: * Get to the first source
1.1 deraadt 1098: */
1099: while (*cp && isspace (*cp)) {
1100: cp++;
1101: }
1102: line = cp;
1103:
1104: /*
1105: * Several special targets take different actions if present with no
1106: * sources:
1107: * a .SUFFIXES line with no sources clears out all old suffixes
1108: * a .PRECIOUS line makes all targets precious
1109: * a .IGNORE line ignores errors for all targets
1110: * a .SILENT line creates silence when making all targets
1111: * a .PATH removes all directories from the search path(s).
1112: */
1113: if (!*line) {
1114: switch (specType) {
1115: case Suffixes:
1116: Suff_ClearSuffixes ();
1117: break;
1118: case Precious:
1119: allPrecious = TRUE;
1120: break;
1121: case Ignore:
1122: ignoreErrors = TRUE;
1123: break;
1124: case Silent:
1125: beSilent = TRUE;
1126: break;
1127: case ExPath:
1128: Lst_ForEach(paths, ParseClearPath, (ClientData)NULL);
1129: break;
1130: default:
1131: break;
1132: }
1133: } else if (specType == MFlags) {
1134: /*
1135: * Call on functions in main.c to deal with these arguments and
1136: * set the initial character to a null-character so the loop to
1137: * get sources won't get anything
1138: */
1139: Main_ParseArgLine (line);
1140: *line = '\0';
1141: } else if (specType == ExShell) {
1142: if (Job_ParseShell (line) != SUCCESS) {
1143: Parse_Error (PARSE_FATAL, "improper shell specification");
1144: return;
1145: }
1146: *line = '\0';
1147: } else if ((specType == NotParallel) || (specType == SingleShell)) {
1148: *line = '\0';
1149: }
1.11 millert 1150:
1.1 deraadt 1151: /*
1.11 millert 1152: * NOW GO FOR THE SOURCES
1.1 deraadt 1153: */
1154: if ((specType == Suffixes) || (specType == ExPath) ||
1155: (specType == Includes) || (specType == Libs) ||
1156: (specType == Null))
1157: {
1158: while (*line) {
1159: /*
1160: * If the target was one that doesn't take files as its sources
1161: * but takes something like suffixes, we take each
1162: * space-separated word on the line as a something and deal
1163: * with it accordingly.
1164: *
1165: * If the target was .SUFFIXES, we take each source as a
1166: * suffix and add it to the list of suffixes maintained by the
1167: * Suff module.
1168: *
1169: * If the target was a .PATH, we add the source as a directory
1170: * to search on the search path.
1171: *
1172: * If it was .INCLUDES, the source is taken to be the suffix of
1173: * files which will be #included and whose search path should
1174: * be present in the .INCLUDES variable.
1175: *
1176: * If it was .LIBS, the source is taken to be the suffix of
1177: * files which are considered libraries and whose search path
1178: * should be present in the .LIBS variable.
1179: *
1180: * If it was .NULL, the source is the suffix to use when a file
1181: * has no valid suffix.
1182: */
1183: char savec;
1184: while (*cp && !isspace (*cp)) {
1185: cp++;
1186: }
1187: savec = *cp;
1188: *cp = '\0';
1189: switch (specType) {
1190: case Suffixes:
1191: Suff_AddSuffix (line);
1192: break;
1193: case ExPath:
1194: Lst_ForEach(paths, ParseAddDir, (ClientData)line);
1195: break;
1196: case Includes:
1197: Suff_AddInclude (line);
1198: break;
1199: case Libs:
1200: Suff_AddLib (line);
1201: break;
1202: case Null:
1203: Suff_SetNull (line);
1204: break;
1205: default:
1206: break;
1207: }
1208: *cp = savec;
1209: if (savec != '\0') {
1210: cp++;
1211: }
1212: while (*cp && isspace (*cp)) {
1213: cp++;
1214: }
1215: line = cp;
1216: }
1217: if (paths) {
1218: Lst_Destroy(paths, NOFREE);
1219: }
1220: } else {
1221: while (*line) {
1222: /*
1223: * The targets take real sources, so we must beware of archive
1224: * specifications (i.e. things with left parentheses in them)
1225: * and handle them accordingly.
1226: */
1227: while (*cp && !isspace (*cp)) {
1228: if ((*cp == '(') && (cp > line) && (cp[-1] != '$')) {
1229: /*
1230: * Only stop for a left parenthesis if it isn't at the
1231: * start of a word (that'll be for variable changes
1232: * later) and isn't preceded by a dollar sign (a dynamic
1233: * source).
1234: */
1235: break;
1236: } else {
1237: cp++;
1238: }
1239: }
1240:
1241: if (*cp == '(') {
1242: GNode *gn;
1243:
1244: sources = Lst_Init (FALSE);
1245: if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) {
1246: Parse_Error (PARSE_FATAL,
1247: "Error in source archive spec \"%s\"", line);
1248: return;
1249: }
1250:
1251: while (!Lst_IsEmpty (sources)) {
1252: gn = (GNode *) Lst_DeQueue (sources);
1.3 deraadt 1253: ParseDoSrc (tOp, gn->name, curSrcs);
1.1 deraadt 1254: }
1255: Lst_Destroy (sources, NOFREE);
1256: cp = line;
1257: } else {
1258: if (*cp) {
1259: *cp = '\0';
1260: cp += 1;
1261: }
1262:
1.3 deraadt 1263: ParseDoSrc (tOp, line, curSrcs);
1.1 deraadt 1264: }
1265: while (*cp && isspace (*cp)) {
1266: cp++;
1267: }
1268: line = cp;
1269: }
1270: }
1.11 millert 1271:
1.1 deraadt 1272: if (mainNode == NILGNODE) {
1273: /*
1274: * If we have yet to decide on a main target to make, in the
1275: * absence of any user input, we want the first target on
1276: * the first dependency line that is actually a real target
1277: * (i.e. isn't a .USE or .EXEC rule) to be made.
1278: */
1279: Lst_ForEach (targets, ParseFindMain, (ClientData)0);
1280: }
1281:
1.3 deraadt 1282: /*
1283: * Finally, destroy the list of sources
1284: */
1285: Lst_Destroy(curSrcs, NOFREE);
1.1 deraadt 1286: }
1287:
1288: /*-
1289: *---------------------------------------------------------------------
1290: * Parse_IsVar --
1291: * Return TRUE if the passed line is a variable assignment. A variable
1292: * assignment consists of a single word followed by optional whitespace
1293: * followed by either a += or an = operator.
1294: * This function is used both by the Parse_File function and main when
1295: * parsing the command-line arguments.
1296: *
1297: * Results:
1298: * TRUE if it is. FALSE if it ain't
1299: *
1300: * Side Effects:
1301: * none
1302: *---------------------------------------------------------------------
1303: */
1304: Boolean
1305: Parse_IsVar (line)
1306: register char *line; /* the line to check */
1307: {
1308: register Boolean wasSpace = FALSE; /* set TRUE if found a space */
1309: register Boolean haveName = FALSE; /* Set TRUE if have a variable name */
1310: int level = 0;
1311: #define ISEQOPERATOR(c) \
1312: (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!'))
1313:
1314: /*
1315: * Skip to variable name
1316: */
1.11 millert 1317: for (;(*line == ' ') || (*line == '\t'); line++)
1.1 deraadt 1318: continue;
1319:
1320: for (; *line != '=' || level != 0; line++)
1321: switch (*line) {
1322: case '\0':
1323: /*
1324: * end-of-line -- can't be a variable assignment.
1325: */
1326: return FALSE;
1327:
1328: case ' ':
1329: case '\t':
1330: /*
1331: * there can be as much white space as desired so long as there is
1.11 millert 1332: * only one word before the operator
1.1 deraadt 1333: */
1334: wasSpace = TRUE;
1335: break;
1336:
1337: case '(':
1338: case '{':
1339: level++;
1340: break;
1341:
1342: case '}':
1343: case ')':
1344: level--;
1345: break;
1.11 millert 1346:
1.1 deraadt 1347: default:
1348: if (wasSpace && haveName) {
1349: if (ISEQOPERATOR(*line)) {
1350: /*
1.9 briggs 1351: * We must have a finished word
1352: */
1353: if (level != 0)
1354: return FALSE;
1355:
1356: /*
1.1 deraadt 1357: * When an = operator [+?!:] is found, the next
1.9 briggs 1358: * character must be an = or it ain't a valid
1.1 deraadt 1359: * assignment.
1360: */
1.9 briggs 1361: if (line[1] == '=')
1.1 deraadt 1362: return haveName;
1.9 briggs 1363: #ifdef SUNSHCMD
1.1 deraadt 1364: /*
1.9 briggs 1365: * This is a shell command
1.1 deraadt 1366: */
1.9 briggs 1367: if (strncmp(line, ":sh", 3) == 0)
1368: return haveName;
1369: #endif
1.1 deraadt 1370: }
1.9 briggs 1371: /*
1372: * This is the start of another word, so not assignment.
1373: */
1374: return FALSE;
1.1 deraadt 1375: }
1376: else {
1.11 millert 1377: haveName = TRUE;
1.1 deraadt 1378: wasSpace = FALSE;
1379: }
1380: break;
1381: }
1382:
1383: return haveName;
1384: }
1385:
1386: /*-
1387: *---------------------------------------------------------------------
1388: * Parse_DoVar --
1389: * Take the variable assignment in the passed line and do it in the
1390: * global context.
1391: *
1392: * Note: There is a lexical ambiguity with assignment modifier characters
1393: * in variable names. This routine interprets the character before the =
1394: * as a modifier. Therefore, an assignment like
1395: * C++=/usr/bin/CC
1396: * is interpreted as "C+ +=" instead of "C++ =".
1397: *
1398: * Results:
1399: * none
1400: *
1401: * Side Effects:
1402: * the variable structure of the given variable name is altered in the
1403: * global context.
1404: *---------------------------------------------------------------------
1405: */
1406: void
1407: Parse_DoVar (line, ctxt)
1408: char *line; /* a line guaranteed to be a variable
1409: * assignment. This reduces error checks */
1410: GNode *ctxt; /* Context in which to do the assignment */
1411: {
1412: char *cp; /* pointer into line */
1413: enum {
1414: VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL
1415: } type; /* Type of assignment */
1.11 millert 1416: char *opc; /* ptr to operator character to
1.1 deraadt 1417: * null-terminate the variable name */
1.11 millert 1418: /*
1.1 deraadt 1419: * Avoid clobbered variable warnings by forcing the compiler
1420: * to ``unregister'' variables
1421: */
1422: #if __GNUC__
1423: (void) &cp;
1424: (void) &line;
1425: #endif
1426:
1427: /*
1428: * Skip to variable name
1429: */
1430: while ((*line == ' ') || (*line == '\t')) {
1431: line++;
1432: }
1433:
1434: /*
1435: * Skip to operator character, nulling out whitespace as we go
1436: */
1437: for (cp = line + 1; *cp != '='; cp++) {
1438: if (isspace (*cp)) {
1439: *cp = '\0';
1440: }
1441: }
1442: opc = cp-1; /* operator is the previous character */
1443: *cp++ = '\0'; /* nuke the = */
1444:
1445: /*
1446: * Check operator type
1447: */
1448: switch (*opc) {
1449: case '+':
1450: type = VAR_APPEND;
1451: *opc = '\0';
1452: break;
1453:
1454: case '?':
1455: /*
1456: * If the variable already has a value, we don't do anything.
1457: */
1458: *opc = '\0';
1459: if (Var_Exists(line, ctxt)) {
1460: return;
1461: } else {
1462: type = VAR_NORMAL;
1463: }
1464: break;
1465:
1466: case ':':
1467: type = VAR_SUBST;
1468: *opc = '\0';
1469: break;
1470:
1471: case '!':
1472: type = VAR_SHELL;
1473: *opc = '\0';
1474: break;
1475:
1476: default:
1.9 briggs 1477: #ifdef SUNSHCMD
1478: while (*opc != ':')
1479: if (--opc < line)
1480: break;
1481:
1482: if (strncmp(opc, ":sh", 3) == 0) {
1483: type = VAR_SHELL;
1484: *opc = '\0';
1485: break;
1486: }
1487: #endif
1.1 deraadt 1488: type = VAR_NORMAL;
1489: break;
1490: }
1491:
1492: while (isspace (*cp)) {
1493: cp++;
1494: }
1495:
1496: if (type == VAR_APPEND) {
1497: Var_Append (line, cp, ctxt);
1498: } else if (type == VAR_SUBST) {
1499: /*
1500: * Allow variables in the old value to be undefined, but leave their
1501: * invocation alone -- this is done by forcing oldVars to be false.
1502: * XXX: This can cause recursive variables, but that's not hard to do,
1503: * and this allows someone to do something like
1504: *
1505: * CFLAGS = $(.INCLUDES)
1506: * CFLAGS := -I.. $(CFLAGS)
1507: *
1508: * And not get an error.
1509: */
1510: Boolean oldOldVars = oldVars;
1511:
1512: oldVars = FALSE;
1513: cp = Var_Subst(NULL, cp, ctxt, FALSE);
1514: oldVars = oldOldVars;
1515:
1516: Var_Set(line, cp, ctxt);
1517: free(cp);
1518: } else if (type == VAR_SHELL) {
1.9 briggs 1519: Boolean freeCmd = FALSE; /* TRUE if the command needs to be freed, i.e.
1520: * if any variable expansion was performed */
1521: char *res, *err;
1.1 deraadt 1522:
1.9 briggs 1523: if (strchr(cp, '$') != NULL) {
1.1 deraadt 1524: /*
1525: * There's a dollar sign in the command, so perform variable
1526: * expansion on the whole thing. The resulting string will need
1527: * freeing when we're done, so set freeCmd to TRUE.
1528: */
1.9 briggs 1529: cp = Var_Subst(NULL, cp, VAR_CMD, TRUE);
1.1 deraadt 1530: freeCmd = TRUE;
1531: }
1532:
1.9 briggs 1533: res = Cmd_Exec(cp, &err);
1534: Var_Set(line, res, ctxt);
1535: free(res);
1.1 deraadt 1536:
1.9 briggs 1537: if (err)
1538: Parse_Error(PARSE_WARNING, err, cp);
1.1 deraadt 1539:
1.9 briggs 1540: if (freeCmd)
1541: free(cp);
1.1 deraadt 1542: } else {
1543: /*
1544: * Normal assignment -- just do it.
1545: */
1.9 briggs 1546: Var_Set(line, cp, ctxt);
1.1 deraadt 1547: }
1548: }
1549:
1.9 briggs 1550:
1.1 deraadt 1551: /*-
1552: * ParseAddCmd --
1553: * Lst_ForEach function to add a command line to all targets
1554: *
1555: * Results:
1556: * Always 0
1557: *
1558: * Side Effects:
1559: * A new element is added to the commands list of the node.
1560: */
1561: static int
1562: ParseAddCmd(gnp, cmd)
1563: ClientData gnp; /* the node to which the command is to be added */
1564: ClientData cmd; /* the command to add */
1565: {
1566: GNode *gn = (GNode *) gnp;
1567: /* if target already supplied, ignore commands */
1568: if (!(gn->type & OP_HAS_COMMANDS))
1569: (void)Lst_AtEnd(gn->commands, cmd);
1570: return(0);
1571: }
1572:
1573: /*-
1574: *-----------------------------------------------------------------------
1575: * ParseHasCommands --
1576: * Callback procedure for Parse_File when destroying the list of
1577: * targets on the last dependency line. Marks a target as already
1578: * having commands if it does, to keep from having shell commands
1579: * on multiple dependency lines.
1580: *
1581: * Results:
1582: * None
1583: *
1584: * Side Effects:
1585: * OP_HAS_COMMANDS may be set for the target.
1586: *
1587: *-----------------------------------------------------------------------
1588: */
1589: static void
1590: ParseHasCommands(gnp)
1591: ClientData gnp; /* Node to examine */
1592: {
1593: GNode *gn = (GNode *) gnp;
1594: if (!Lst_IsEmpty(gn->commands)) {
1595: gn->type |= OP_HAS_COMMANDS;
1596: }
1597: }
1598:
1599: /*-
1600: *-----------------------------------------------------------------------
1601: * Parse_AddIncludeDir --
1602: * Add a directory to the path searched for included makefiles
1603: * bracketed by double-quotes. Used by functions in main.c
1604: *
1605: * Results:
1606: * None.
1607: *
1608: * Side Effects:
1609: * The directory is appended to the list.
1610: *
1611: *-----------------------------------------------------------------------
1612: */
1613: void
1614: Parse_AddIncludeDir (dir)
1615: char *dir; /* The name of the directory to add */
1616: {
1617: Dir_AddDir (parseIncPath, dir);
1618: }
1619:
1620: /*-
1621: *---------------------------------------------------------------------
1622: * ParseDoInclude --
1623: * Push to another file.
1.11 millert 1624: *
1.1 deraadt 1625: * The input is the line minus the #include. A file spec is a string
1626: * enclosed in <> or "". The former is looked for only in sysIncPath.
1627: * The latter in . and the directories specified by -I command line
1628: * options
1629: *
1630: * Results:
1631: * None
1632: *
1633: * Side Effects:
1634: * A structure is added to the includes Lst and readProc, lineno,
1635: * fname and curFILE are altered for the new file
1636: *---------------------------------------------------------------------
1637: */
1638: static void
1639: ParseDoInclude (file)
1640: char *file; /* file specification */
1641: {
1642: char *fullname; /* full pathname of file */
1643: IFile *oldFile; /* state associated with current file */
1644: char endc; /* the character which ends the file spec */
1645: char *cp; /* current position in file spec */
1646: Boolean isSystem; /* TRUE if makefile is a system makefile */
1647:
1648: /*
1649: * Skip to delimiter character so we know where to look
1650: */
1651: while ((*file == ' ') || (*file == '\t')) {
1652: file++;
1653: }
1654:
1655: if ((*file != '"') && (*file != '<')) {
1656: Parse_Error (PARSE_FATAL,
1657: ".include filename must be delimited by '\"' or '<'");
1658: return;
1659: }
1660:
1661: /*
1662: * Set the search path on which to find the include file based on the
1663: * characters which bracket its name. Angle-brackets imply it's
1664: * a system Makefile while double-quotes imply it's a user makefile
1665: */
1666: if (*file == '<') {
1667: isSystem = TRUE;
1668: endc = '>';
1669: } else {
1670: isSystem = FALSE;
1671: endc = '"';
1672: }
1673:
1674: /*
1675: * Skip to matching delimiter
1676: */
1677: for (cp = ++file; *cp && *cp != endc; cp++) {
1678: continue;
1679: }
1680:
1681: if (*cp != endc) {
1682: Parse_Error (PARSE_FATAL,
1683: "Unclosed %cinclude filename. '%c' expected",
1684: '.', endc);
1685: return;
1686: }
1687: *cp = '\0';
1688:
1689: /*
1690: * Substitute for any variables in the file name before trying to
1691: * find the thing.
1692: */
1693: file = Var_Subst (NULL, file, VAR_CMD, FALSE);
1694:
1695: /*
1696: * Now we know the file's name and its search path, we attempt to
1697: * find the durn thing. A return of NULL indicates the file don't
1698: * exist.
1699: */
1700: if (!isSystem) {
1701: /*
1702: * Include files contained in double-quotes are first searched for
1703: * relative to the including file's location. We don't want to
1704: * cd there, of course, so we just tack on the old file's
1705: * leading path components and call Dir_FindFile to see if
1706: * we can locate the beast.
1707: */
1.4 niklas 1708: char *prefEnd, *Fname;
1.1 deraadt 1709:
1.4 niklas 1710: /* Make a temporary copy of this, to be safe. */
1.9 briggs 1711: Fname = estrdup(fname);
1.4 niklas 1712:
1713: prefEnd = strrchr (Fname, '/');
1.1 deraadt 1714: if (prefEnd != (char *)NULL) {
1715: char *newName;
1.11 millert 1716:
1.1 deraadt 1717: *prefEnd = '\0';
1718: if (file[0] == '/')
1.9 briggs 1719: newName = estrdup(file);
1.1 deraadt 1720: else
1.4 niklas 1721: newName = str_concat (Fname, file, STR_ADDSLASH);
1.1 deraadt 1722: fullname = Dir_FindFile (newName, parseIncPath);
1723: if (fullname == (char *)NULL) {
1724: fullname = Dir_FindFile(newName, dirSearchPath);
1725: }
1726: free (newName);
1727: *prefEnd = '/';
1728: } else {
1729: fullname = (char *)NULL;
1730: }
1.4 niklas 1731: free (Fname);
1.1 deraadt 1732: } else {
1733: fullname = (char *)NULL;
1734: }
1735:
1736: if (fullname == (char *)NULL) {
1737: /*
1738: * System makefile or makefile wasn't found in same directory as
1739: * included makefile. Search for it first on the -I search path,
1740: * then on the .PATH search path, if not found in a -I directory.
1741: * XXX: Suffix specific?
1742: */
1743: fullname = Dir_FindFile (file, parseIncPath);
1744: if (fullname == (char *)NULL) {
1745: fullname = Dir_FindFile(file, dirSearchPath);
1746: }
1747: }
1748:
1749: if (fullname == (char *)NULL) {
1750: /*
1751: * Still haven't found the makefile. Look for it on the system
1752: * path as a last resort.
1753: */
1754: fullname = Dir_FindFile(file, sysIncPath);
1755: }
1756:
1757: if (fullname == (char *) NULL) {
1758: *cp = endc;
1759: Parse_Error (PARSE_FATAL, "Could not find %s", file);
1760: return;
1761: }
1762:
1763: free(file);
1764:
1765: /*
1766: * Once we find the absolute path to the file, we get to save all the
1767: * state from the current file before we can start reading this
1768: * include file. The state is stored in an IFile structure which
1769: * is placed on a list with other IFile structures. The list makes
1770: * a very nice stack to track how we got here...
1771: */
1772: oldFile = (IFile *) emalloc (sizeof (IFile));
1773: oldFile->fname = fname;
1774:
1775: oldFile->F = curFILE;
1776: oldFile->p = curPTR;
1777: oldFile->lineno = lineno;
1778:
1779: (void) Lst_AtFront (includes, (ClientData)oldFile);
1780:
1781: /*
1782: * Once the previous state has been saved, we can get down to reading
1783: * the new file. We set up the name of the file to be the absolute
1784: * name of the include file so error messages refer to the right
1785: * place. Naturally enough, we start reading at line number 0.
1786: */
1787: fname = fullname;
1788: lineno = 0;
1789:
1790: curFILE = fopen (fullname, "r");
1791: curPTR = NULL;
1792: if (curFILE == (FILE * ) NULL) {
1793: Parse_Error (PARSE_FATAL, "Cannot open %s", fullname);
1794: /*
1795: * Pop to previous file
1796: */
1797: (void) ParseEOF(0);
1798: }
1799: }
1800:
1801:
1802: /*-
1803: *---------------------------------------------------------------------
1804: * Parse_FromString --
1805: * Start Parsing from the given string
1.11 millert 1806: *
1.1 deraadt 1807: * Results:
1808: * None
1809: *
1810: * Side Effects:
1811: * A structure is added to the includes Lst and readProc, lineno,
1812: * fname and curFILE are altered for the new file
1813: *---------------------------------------------------------------------
1814: */
1815: void
1816: Parse_FromString(str)
1817: char *str;
1818: {
1819: IFile *oldFile; /* state associated with this file */
1820:
1821: if (DEBUG(FOR))
1822: (void) fprintf(stderr, "%s\n----\n", str);
1823:
1824: oldFile = (IFile *) emalloc (sizeof (IFile));
1825: oldFile->lineno = lineno;
1826: oldFile->fname = fname;
1827: oldFile->F = curFILE;
1828: oldFile->p = curPTR;
1.11 millert 1829:
1.1 deraadt 1830: (void) Lst_AtFront (includes, (ClientData)oldFile);
1831:
1832: curFILE = NULL;
1833: curPTR = (PTR *) emalloc (sizeof (PTR));
1834: curPTR->str = curPTR->ptr = str;
1835: lineno = 0;
1.9 briggs 1836: fname = estrdup(fname);
1.1 deraadt 1837: }
1838:
1839:
1840: #ifdef SYSVINCLUDE
1841: /*-
1842: *---------------------------------------------------------------------
1843: * ParseTraditionalInclude --
1844: * Push to another file.
1.11 millert 1845: *
1.1 deraadt 1846: * The input is the line minus the "include". The file name is
1847: * the string following the "include".
1848: *
1849: * Results:
1850: * None
1851: *
1852: * Side Effects:
1853: * A structure is added to the includes Lst and readProc, lineno,
1854: * fname and curFILE are altered for the new file
1855: *---------------------------------------------------------------------
1856: */
1857: static void
1858: ParseTraditionalInclude (file)
1859: char *file; /* file specification */
1860: {
1861: char *fullname; /* full pathname of file */
1862: IFile *oldFile; /* state associated with current file */
1863: char *cp; /* current position in file spec */
1864: char *prefEnd;
1865:
1866: /*
1867: * Skip over whitespace
1868: */
1869: while ((*file == ' ') || (*file == '\t')) {
1870: file++;
1871: }
1872:
1873: if (*file == '\0') {
1874: Parse_Error (PARSE_FATAL,
1875: "Filename missing from \"include\"");
1876: return;
1877: }
1878:
1879: /*
1880: * Skip to end of line or next whitespace
1881: */
1882: for (cp = file; *cp && *cp != '\n' && *cp != '\t' && *cp != ' '; cp++) {
1883: continue;
1884: }
1885:
1886: *cp = '\0';
1887:
1888: /*
1889: * Substitute for any variables in the file name before trying to
1890: * find the thing.
1891: */
1892: file = Var_Subst (NULL, file, VAR_CMD, FALSE);
1893:
1894: /*
1895: * Now we know the file's name, we attempt to find the durn thing.
1896: * A return of NULL indicates the file don't exist.
1897: *
1898: * Include files are first searched for relative to the including
1899: * file's location. We don't want to cd there, of course, so we
1900: * just tack on the old file's leading path components and call
1901: * Dir_FindFile to see if we can locate the beast.
1902: * XXX - this *does* search in the current directory, right?
1903: */
1904:
1905: prefEnd = strrchr (fname, '/');
1906: if (prefEnd != (char *)NULL) {
1907: char *newName;
1.11 millert 1908:
1.1 deraadt 1909: *prefEnd = '\0';
1910: newName = str_concat (fname, file, STR_ADDSLASH);
1911: fullname = Dir_FindFile (newName, parseIncPath);
1912: if (fullname == (char *)NULL) {
1913: fullname = Dir_FindFile(newName, dirSearchPath);
1914: }
1915: free (newName);
1916: *prefEnd = '/';
1917: } else {
1918: fullname = (char *)NULL;
1919: }
1920:
1921: if (fullname == (char *)NULL) {
1922: /*
1923: * System makefile or makefile wasn't found in same directory as
1924: * included makefile. Search for it first on the -I search path,
1925: * then on the .PATH search path, if not found in a -I directory.
1926: * XXX: Suffix specific?
1927: */
1928: fullname = Dir_FindFile (file, parseIncPath);
1929: if (fullname == (char *)NULL) {
1930: fullname = Dir_FindFile(file, dirSearchPath);
1931: }
1932: }
1933:
1934: if (fullname == (char *)NULL) {
1935: /*
1936: * Still haven't found the makefile. Look for it on the system
1937: * path as a last resort.
1938: */
1939: fullname = Dir_FindFile(file, sysIncPath);
1940: }
1941:
1942: if (fullname == (char *) NULL) {
1943: Parse_Error (PARSE_FATAL, "Could not find %s", file);
1944: return;
1945: }
1946:
1947: /*
1948: * Once we find the absolute path to the file, we get to save all the
1949: * state from the current file before we can start reading this
1950: * include file. The state is stored in an IFile structure which
1951: * is placed on a list with other IFile structures. The list makes
1952: * a very nice stack to track how we got here...
1953: */
1954: oldFile = (IFile *) emalloc (sizeof (IFile));
1955: oldFile->fname = fname;
1956:
1957: oldFile->F = curFILE;
1958: oldFile->p = curPTR;
1959: oldFile->lineno = lineno;
1960:
1961: (void) Lst_AtFront (includes, (ClientData)oldFile);
1962:
1963: /*
1964: * Once the previous state has been saved, we can get down to reading
1965: * the new file. We set up the name of the file to be the absolute
1966: * name of the include file so error messages refer to the right
1967: * place. Naturally enough, we start reading at line number 0.
1968: */
1969: fname = fullname;
1970: lineno = 0;
1971:
1972: curFILE = fopen (fullname, "r");
1973: curPTR = NULL;
1974: if (curFILE == (FILE * ) NULL) {
1975: Parse_Error (PARSE_FATAL, "Cannot open %s", fullname);
1976: /*
1977: * Pop to previous file
1978: */
1979: (void) ParseEOF(1);
1980: }
1981: }
1982: #endif
1983:
1984: /*-
1985: *---------------------------------------------------------------------
1986: * ParseEOF --
1987: * Called when EOF is reached in the current file. If we were reading
1988: * an include file, the includes stack is popped and things set up
1989: * to go back to reading the previous file at the previous location.
1990: *
1991: * Results:
1992: * CONTINUE if there's more to do. DONE if not.
1993: *
1994: * Side Effects:
1995: * The old curFILE, is closed. The includes list is shortened.
1996: * lineno, curFILE, and fname are changed if CONTINUE is returned.
1997: *---------------------------------------------------------------------
1998: */
1999: static int
2000: ParseEOF (opened)
2001: int opened;
2002: {
2003: IFile *ifile; /* the state on the top of the includes stack */
2004:
2005: if (Lst_IsEmpty (includes)) {
2006: return (DONE);
2007: }
2008:
2009: ifile = (IFile *) Lst_DeQueue (includes);
2010: free ((Address) fname);
2011: fname = ifile->fname;
2012: lineno = ifile->lineno;
2013: if (opened && curFILE)
2014: (void) fclose (curFILE);
2015: if (curPTR) {
2016: free((Address) curPTR->str);
2017: free((Address) curPTR);
2018: }
2019: curFILE = ifile->F;
2020: curPTR = ifile->p;
2021: free ((Address)ifile);
2022: return (CONTINUE);
2023: }
2024:
2025: /*-
2026: *---------------------------------------------------------------------
2027: * ParseReadc --
1.11 millert 2028: * Read a character from the current file
1.1 deraadt 2029: *
2030: * Results:
2031: * The character that was read
2032: *
2033: * Side Effects:
2034: *---------------------------------------------------------------------
2035: */
2036: static int
2037: ParseReadc()
2038: {
2039: if (curFILE)
2040: return fgetc(curFILE);
1.11 millert 2041:
1.1 deraadt 2042: if (curPTR && *curPTR->ptr)
2043: return *curPTR->ptr++;
2044: return EOF;
2045: }
2046:
2047:
2048: /*-
2049: *---------------------------------------------------------------------
2050: * ParseUnreadc --
1.11 millert 2051: * Put back a character to the current file
1.1 deraadt 2052: *
2053: * Results:
2054: * None.
2055: *
2056: * Side Effects:
2057: *---------------------------------------------------------------------
2058: */
2059: static void
2060: ParseUnreadc(c)
2061: int c;
2062: {
2063: if (curFILE) {
2064: ungetc(c, curFILE);
2065: return;
2066: }
2067: if (curPTR) {
2068: *--(curPTR->ptr) = c;
2069: return;
2070: }
2071: }
2072:
2073:
2074: /* ParseSkipLine():
2075: * Grab the next line
2076: */
2077: static char *
2078: ParseSkipLine(skip)
2079: int skip; /* Skip lines that don't start with . */
2080: {
2081: char *line;
1.11 millert 2082: int c, lastc, lineLength = 0;
1.1 deraadt 2083: Buffer buf;
2084:
1.11 millert 2085: buf = Buf_Init(MAKE_BSIZE);
2086:
2087: do {
2088: Buf_Discard(buf, lineLength);
2089: lastc = '\0';
2090:
2091: while (((c = ParseReadc()) != '\n' || lastc == '\\')
2092: && c != EOF) {
2093: if (c == '\n') {
2094: Buf_ReplaceLastByte(buf, (Byte)' ');
2095: lineno++;
2096:
2097: while ((c = ParseReadc()) == ' ' || c == '\t');
2098:
2099: if (c == EOF)
2100: break;
2101: }
2102:
2103: Buf_AddByte(buf, (Byte)c);
2104: lastc = c;
2105: }
2106:
2107: if (c == EOF) {
2108: Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop");
2109: Buf_Destroy(buf, TRUE);
2110: return((char *)NULL);
2111: }
2112:
2113: lineno++;
2114: Buf_AddByte(buf, (Byte)'\0');
2115: line = (char *)Buf_GetAll(buf, &lineLength);
2116: } while (skip == 1 && line[0] != '.');
1.1 deraadt 2117:
1.11 millert 2118: Buf_Destroy(buf, FALSE);
1.1 deraadt 2119: return line;
2120: }
2121:
2122:
2123: /*-
2124: *---------------------------------------------------------------------
2125: * ParseReadLine --
2126: * Read an entire line from the input file. Called only by Parse_File.
2127: * To facilitate escaped newlines and what have you, a character is
2128: * buffered in 'lastc', which is '\0' when no characters have been
2129: * read. When we break out of the loop, c holds the terminating
2130: * character and lastc holds a character that should be added to
2131: * the line (unless we don't read anything but a terminator).
2132: *
2133: * Results:
2134: * A line w/o its newline
2135: *
2136: * Side Effects:
2137: * Only those associated with reading a character
2138: *---------------------------------------------------------------------
2139: */
2140: static char *
2141: ParseReadLine ()
2142: {
2143: Buffer buf; /* Buffer for current line */
2144: register int c; /* the current character */
2145: register int lastc; /* The most-recent character */
2146: Boolean semiNL; /* treat semi-colons as newlines */
2147: Boolean ignDepOp; /* TRUE if should ignore dependency operators
2148: * for the purposes of setting semiNL */
2149: Boolean ignComment; /* TRUE if should ignore comments (in a
2150: * shell command */
2151: char *line; /* Result */
2152: char *ep; /* to strip trailing blanks */
2153: int lineLength; /* Length of result */
2154:
2155: semiNL = FALSE;
2156: ignDepOp = FALSE;
2157: ignComment = FALSE;
2158:
2159: /*
2160: * Handle special-characters at the beginning of the line. Either a
2161: * leading tab (shell command) or pound-sign (possible conditional)
2162: * forces us to ignore comments and dependency operators and treat
2163: * semi-colons as semi-colons (by leaving semiNL FALSE). This also
2164: * discards completely blank lines.
2165: */
2166: for (;;) {
2167: c = ParseReadc();
2168:
2169: if (c == '\t') {
2170: ignComment = ignDepOp = TRUE;
2171: break;
2172: } else if (c == '\n') {
2173: lineno++;
2174: } else if (c == '#') {
2175: ParseUnreadc(c);
2176: break;
2177: } else {
2178: /*
2179: * Anything else breaks out without doing anything
2180: */
2181: break;
2182: }
2183: }
1.11 millert 2184:
1.1 deraadt 2185: if (c != EOF) {
2186: lastc = c;
2187: buf = Buf_Init(MAKE_BSIZE);
1.11 millert 2188:
1.1 deraadt 2189: while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) &&
2190: (c != EOF))
2191: {
2192: test_char:
2193: switch(c) {
2194: case '\n':
2195: /*
2196: * Escaped newline: read characters until a non-space or an
2197: * unescaped newline and replace them all by a single space.
2198: * This is done by storing the space over the backslash and
2199: * dropping through with the next nonspace. If it is a
2200: * semi-colon and semiNL is TRUE, it will be recognized as a
2201: * newline in the code below this...
2202: */
2203: lineno++;
2204: lastc = ' ';
2205: while ((c = ParseReadc ()) == ' ' || c == '\t') {
2206: continue;
2207: }
2208: if (c == EOF || c == '\n') {
2209: goto line_read;
2210: } else {
2211: /*
2212: * Check for comments, semiNL's, etc. -- easier than
2213: * ParseUnreadc(c); continue;
2214: */
2215: goto test_char;
2216: }
2217: /*NOTREACHED*/
2218: break;
2219:
2220: case ';':
2221: /*
2222: * Semi-colon: Need to see if it should be interpreted as a
2223: * newline
2224: */
2225: if (semiNL) {
2226: /*
2227: * To make sure the command that may be following this
2228: * semi-colon begins with a tab, we push one back into the
2229: * input stream. This will overwrite the semi-colon in the
2230: * buffer. If there is no command following, this does no
2231: * harm, since the newline remains in the buffer and the
2232: * whole line is ignored.
2233: */
2234: ParseUnreadc('\t');
2235: goto line_read;
1.11 millert 2236: }
1.1 deraadt 2237: break;
2238: case '=':
2239: if (!semiNL) {
2240: /*
2241: * Haven't seen a dependency operator before this, so this
2242: * must be a variable assignment -- don't pay attention to
2243: * dependency operators after this.
2244: */
2245: ignDepOp = TRUE;
2246: } else if (lastc == ':' || lastc == '!') {
2247: /*
2248: * Well, we've seen a dependency operator already, but it
2249: * was the previous character, so this is really just an
2250: * expanded variable assignment. Revert semi-colons to
2251: * being just semi-colons again and ignore any more
2252: * dependency operators.
2253: *
2254: * XXX: Note that a line like "foo : a:=b" will blow up,
2255: * but who'd write a line like that anyway?
2256: */
2257: ignDepOp = TRUE; semiNL = FALSE;
2258: }
2259: break;
2260: case '#':
2261: if (!ignComment) {
1.2 deraadt 2262: if (
2263: #if 0
2264: compatMake &&
2265: #endif
2266: (lastc != '\\')) {
1.1 deraadt 2267: /*
2268: * If the character is a hash mark and it isn't escaped
2269: * (or we're being compatible), the thing is a comment.
2270: * Skip to the end of the line.
2271: */
2272: do {
2273: c = ParseReadc();
2274: } while ((c != '\n') && (c != EOF));
2275: goto line_read;
2276: } else {
2277: /*
2278: * Don't add the backslash. Just let the # get copied
2279: * over.
2280: */
2281: lastc = c;
2282: continue;
2283: }
2284: }
2285: break;
2286: case ':':
2287: case '!':
2288: if (!ignDepOp && (c == ':' || c == '!')) {
2289: /*
2290: * A semi-colon is recognized as a newline only on
2291: * dependency lines. Dependency lines are lines with a
2292: * colon or an exclamation point. Ergo...
2293: */
2294: semiNL = TRUE;
2295: }
2296: break;
2297: }
2298: /*
2299: * Copy in the previous character and save this one in lastc.
2300: */
2301: Buf_AddByte (buf, (Byte)lastc);
2302: lastc = c;
1.11 millert 2303:
1.1 deraadt 2304: }
2305: line_read:
2306: lineno++;
1.11 millert 2307:
1.1 deraadt 2308: if (lastc != '\0') {
2309: Buf_AddByte (buf, (Byte)lastc);
2310: }
2311: Buf_AddByte (buf, (Byte)'\0');
2312: line = (char *)Buf_GetAll (buf, &lineLength);
2313: Buf_Destroy (buf, FALSE);
2314:
2315: /*
2316: * Strip trailing blanks and tabs from the line.
2317: * Do not strip a blank or tab that is preceeded by
2318: * a '\'
2319: */
2320: ep = line;
2321: while (*ep)
2322: ++ep;
1.11 millert 2323: while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) {
1.1 deraadt 2324: if (ep > line + 1 && ep[-2] == '\\')
2325: break;
2326: --ep;
2327: }
2328: *ep = 0;
1.11 millert 2329:
1.1 deraadt 2330: if (line[0] == '.') {
2331: /*
2332: * The line might be a conditional. Ask the conditional module
2333: * about it and act accordingly
2334: */
2335: switch (Cond_Eval (line)) {
2336: case COND_SKIP:
2337: /*
2338: * Skip to next conditional that evaluates to COND_PARSE.
2339: */
2340: do {
2341: free (line);
2342: line = ParseSkipLine(1);
2343: } while (line && Cond_Eval(line) != COND_PARSE);
2344: if (line == NULL)
2345: break;
2346: /*FALLTHRU*/
2347: case COND_PARSE:
2348: free ((Address) line);
2349: line = ParseReadLine();
2350: break;
2351: case COND_INVALID:
2352: if (For_Eval(line)) {
2353: int ok;
2354: free(line);
2355: do {
2356: /*
2357: * Skip after the matching end
2358: */
2359: line = ParseSkipLine(0);
2360: if (line == NULL) {
1.11 millert 2361: Parse_Error (PARSE_FATAL,
1.1 deraadt 2362: "Unexpected end of file in for loop.\n");
2363: break;
2364: }
2365: ok = For_Eval(line);
2366: free(line);
2367: }
2368: while (ok);
2369: if (line != NULL)
2370: For_Run();
2371: line = ParseReadLine();
2372: }
2373: break;
2374: }
2375: }
2376: return (line);
2377:
2378: } else {
2379: /*
2380: * Hit end-of-file, so return a NULL line to indicate this.
2381: */
2382: return((char *)NULL);
2383: }
2384: }
2385:
2386: /*-
2387: *-----------------------------------------------------------------------
2388: * ParseFinishLine --
2389: * Handle the end of a dependency group.
2390: *
2391: * Results:
2392: * Nothing.
2393: *
2394: * Side Effects:
2395: * inLine set FALSE. 'targets' list destroyed.
2396: *
2397: *-----------------------------------------------------------------------
2398: */
2399: static void
2400: ParseFinishLine()
2401: {
2402: if (inLine) {
2403: Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL);
2404: Lst_Destroy (targets, ParseHasCommands);
2405: targets = NULL;
2406: inLine = FALSE;
2407: }
2408: }
1.11 millert 2409:
1.1 deraadt 2410:
2411: /*-
2412: *---------------------------------------------------------------------
2413: * Parse_File --
2414: * Parse a file into its component parts, incorporating it into the
2415: * current dependency graph. This is the main function and controls
2416: * almost every other function in this module
2417: *
2418: * Results:
2419: * None
2420: *
2421: * Side Effects:
2422: * Loads. Nodes are added to the list of all targets, nodes and links
2423: * are added to the dependency graph. etc. etc. etc.
2424: *---------------------------------------------------------------------
2425: */
2426: void
2427: Parse_File(name, stream)
2428: char *name; /* the name of the file being read */
2429: FILE * stream; /* Stream open to makefile to parse */
2430: {
2431: register char *cp, /* pointer into the line */
2432: *line; /* the line we're working on */
2433:
2434: inLine = FALSE;
2435: fname = name;
2436: curFILE = stream;
2437: lineno = 0;
2438: fatals = 0;
2439:
2440: do {
2441: while ((line = ParseReadLine ()) != NULL) {
2442: if (*line == '.') {
2443: /*
2444: * Lines that begin with the special character are either
2445: * include or undef directives.
2446: */
2447: for (cp = line + 1; isspace (*cp); cp++) {
2448: continue;
2449: }
2450: if (strncmp (cp, "include", 7) == 0) {
2451: ParseDoInclude (cp + 7);
2452: goto nextLine;
2453: } else if (strncmp(cp, "undef", 5) == 0) {
2454: char *cp2;
2455: for (cp += 5; isspace((unsigned char) *cp); cp++) {
2456: continue;
2457: }
2458:
2459: for (cp2 = cp; !isspace((unsigned char) *cp2) &&
2460: (*cp2 != '\0'); cp2++) {
2461: continue;
2462: }
2463:
2464: *cp2 = '\0';
2465:
2466: Var_Delete(cp, VAR_GLOBAL);
2467: goto nextLine;
2468: }
2469: }
1.11 millert 2470: if (*line == '#') {
2471: /* If we're this far, the line must be a comment. */
1.1 deraadt 2472: goto nextLine;
2473: }
1.11 millert 2474:
1.1 deraadt 2475: if (*line == '\t') {
2476: /*
2477: * If a line starts with a tab, it can only hope to be
2478: * a creation command.
2479: */
2480: #ifndef POSIX
2481: shellCommand:
2482: #endif
2483: for (cp = line + 1; isspace (*cp); cp++) {
2484: continue;
2485: }
2486: if (*cp) {
2487: if (inLine) {
2488: /*
2489: * So long as it's not a blank line and we're actually
2490: * in a dependency spec, add the command to the list of
1.11 millert 2491: * commands of all targets in the dependency spec
1.1 deraadt 2492: */
2493: Lst_ForEach (targets, ParseAddCmd, cp);
2494: Lst_AtEnd(targCmds, (ClientData) line);
2495: continue;
2496: } else {
2497: Parse_Error (PARSE_FATAL,
1.10 briggs 2498: "Unassociated shell command \"%s\"",
1.1 deraadt 2499: cp);
2500: }
2501: }
2502: #ifdef SYSVINCLUDE
1.11 millert 2503: } else if (strncmp (line, "include", 7) == 0 &&
1.6 tholo 2504: isspace((unsigned char) line[7]) &&
1.1 deraadt 2505: strchr(line, ':') == NULL) {
2506: /*
2507: * It's an S3/S5-style "include".
2508: */
2509: ParseTraditionalInclude (line + 7);
2510: goto nextLine;
2511: #endif
2512: } else if (Parse_IsVar (line)) {
2513: ParseFinishLine();
2514: Parse_DoVar (line, VAR_GLOBAL);
2515: } else {
2516: /*
2517: * We now know it's a dependency line so it needs to have all
2518: * variables expanded before being parsed. Tell the variable
2519: * module to complain if some variable is undefined...
2520: * To make life easier on novices, if the line is indented we
2521: * first make sure the line has a dependency operator in it.
2522: * If it doesn't have an operator and we're in a dependency
2523: * line's script, we assume it's actually a shell command
2524: * and add it to the current list of targets.
2525: */
2526: #ifndef POSIX
2527: Boolean nonSpace = FALSE;
2528: #endif
1.11 millert 2529:
1.1 deraadt 2530: cp = line;
2531: if (isspace((unsigned char) line[0])) {
2532: while ((*cp != '\0') && isspace((unsigned char) *cp)) {
2533: cp++;
2534: }
2535: if (*cp == '\0') {
2536: goto nextLine;
2537: }
2538: #ifndef POSIX
2539: while ((*cp != ':') && (*cp != '!') && (*cp != '\0')) {
2540: nonSpace = TRUE;
2541: cp++;
2542: }
2543: #endif
2544: }
1.11 millert 2545:
1.1 deraadt 2546: #ifndef POSIX
2547: if (*cp == '\0') {
2548: if (inLine) {
2549: Parse_Error (PARSE_WARNING,
2550: "Shell command needs a leading tab");
2551: goto shellCommand;
2552: } else if (nonSpace) {
2553: Parse_Error (PARSE_FATAL, "Missing operator");
2554: }
2555: } else {
2556: #endif
2557: ParseFinishLine();
2558:
2559: cp = Var_Subst (NULL, line, VAR_CMD, TRUE);
2560: free (line);
2561: line = cp;
1.11 millert 2562:
1.1 deraadt 2563: /*
1.11 millert 2564: * Need a non-circular list for the target nodes
1.1 deraadt 2565: */
2566: if (targets)
2567: Lst_Destroy(targets, NOFREE);
2568:
2569: targets = Lst_Init (FALSE);
2570: inLine = TRUE;
1.11 millert 2571:
1.1 deraadt 2572: ParseDoDependency (line);
2573: #ifndef POSIX
2574: }
2575: #endif
2576: }
2577:
2578: nextLine:
2579:
2580: free (line);
2581: }
2582: /*
1.11 millert 2583: * Reached EOF, but it may be just EOF of an include file...
1.1 deraadt 2584: */
2585: } while (ParseEOF(1) == CONTINUE);
2586:
2587: /*
2588: * Make sure conditionals are clean
2589: */
2590: Cond_End();
2591:
2592: if (fatals) {
2593: fprintf (stderr, "Fatal errors encountered -- cannot continue\n");
2594: exit (1);
2595: }
2596: }
2597:
2598: /*-
2599: *---------------------------------------------------------------------
2600: * Parse_Init --
2601: * initialize the parsing module
2602: *
2603: * Results:
2604: * none
2605: *
2606: * Side Effects:
2607: * the parseIncPath list is initialized...
2608: *---------------------------------------------------------------------
2609: */
2610: void
2611: Parse_Init ()
2612: {
2613: mainNode = NILGNODE;
2614: parseIncPath = Lst_Init (FALSE);
2615: sysIncPath = Lst_Init (FALSE);
2616: includes = Lst_Init (FALSE);
2617: targCmds = Lst_Init (FALSE);
2618: }
2619:
2620: void
2621: Parse_End()
2622: {
2623: Lst_Destroy(targCmds, (void (*) __P((ClientData))) free);
2624: if (targets)
2625: Lst_Destroy(targets, NOFREE);
2626: Lst_Destroy(sysIncPath, Dir_Destroy);
2627: Lst_Destroy(parseIncPath, Dir_Destroy);
2628: Lst_Destroy(includes, NOFREE); /* Should be empty now */
2629: }
1.11 millert 2630:
1.1 deraadt 2631:
2632: /*-
2633: *-----------------------------------------------------------------------
2634: * Parse_MainName --
2635: * Return a Lst of the main target to create for main()'s sake. If
2636: * no such target exists, we Punt with an obnoxious error message.
2637: *
2638: * Results:
2639: * A Lst of the single node to create.
2640: *
2641: * Side Effects:
2642: * None.
2643: *
2644: *-----------------------------------------------------------------------
2645: */
2646: Lst
2647: Parse_MainName()
2648: {
1.14 millert 2649: Lst listmain; /* result list */
1.1 deraadt 2650:
1.14 millert 2651: listmain = Lst_Init (FALSE);
1.1 deraadt 2652:
2653: if (mainNode == NILGNODE) {
1.8 deraadt 2654: Punt ("no target to make.");
1.1 deraadt 2655: /*NOTREACHED*/
2656: } else if (mainNode->type & OP_DOUBLEDEP) {
1.14 millert 2657: (void) Lst_AtEnd (listmain, (ClientData)mainNode);
2658: Lst_Concat(listmain, mainNode->cohorts, LST_CONCNEW);
1.1 deraadt 2659: }
2660: else
1.14 millert 2661: (void) Lst_AtEnd (listmain, (ClientData)mainNode);
2662: return (listmain);
1.1 deraadt 2663: }
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