1 /* $NetBSD: parse.c,v 1.48 2000/05/11 08:22:40 sjg Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1989 by Berkeley Softworks 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Adam de Boor. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #ifdef MAKE_BOOTSTRAP 42 static char rcsid[] = "$NetBSD: parse.c,v 1.48 2000/05/11 08:22:40 sjg Exp $"; 43 #else 44 #include <sys/cdefs.h> 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94"; 48 #else 49 __RCSID("$NetBSD: parse.c,v 1.48 2000/05/11 08:22:40 sjg Exp $"); 50 #endif 51 #endif /* not lint */ 52 #endif 53 54 /*- 55 * parse.c -- 56 * Functions to parse a makefile. 57 * 58 * One function, Parse_Init, must be called before any functions 59 * in this module are used. After that, the function Parse_File is the 60 * main entry point and controls most of the other functions in this 61 * module. 62 * 63 * Most important structures are kept in Lsts. Directories for 64 * the #include "..." function are kept in the 'parseIncPath' Lst, while 65 * those for the #include <...> are kept in the 'sysIncPath' Lst. The 66 * targets currently being defined are kept in the 'targets' Lst. 67 * 68 * The variables 'fname' and 'lineno' are used to track the name 69 * of the current file and the line number in that file so that error 70 * messages can be more meaningful. 71 * 72 * Interface: 73 * Parse_Init Initialization function which must be 74 * called before anything else in this module 75 * is used. 76 * 77 * Parse_End Cleanup the module 78 * 79 * Parse_File Function used to parse a makefile. It must 80 * be given the name of the file, which should 81 * already have been opened, and a function 82 * to call to read a character from the file. 83 * 84 * Parse_IsVar Returns TRUE if the given line is a 85 * variable assignment. Used by MainParseArgs 86 * to determine if an argument is a target 87 * or a variable assignment. Used internally 88 * for pretty much the same thing... 89 * 90 * Parse_Error Function called when an error occurs in 91 * parsing. Used by the variable and 92 * conditional modules. 93 * Parse_MainName Returns a Lst of the main target to create. 94 */ 95 96 #ifdef __STDC__ 97 #include <stdarg.h> 98 #else 99 #include <varargs.h> 100 #endif 101 #include <stdio.h> 102 #include <ctype.h> 103 #include <errno.h> 104 #include "make.h" 105 #include "hash.h" 106 #include "dir.h" 107 #include "job.h" 108 #include "buf.h" 109 #include "pathnames.h" 110 111 /* 112 * These values are returned by ParseEOF to tell Parse_File whether to 113 * CONTINUE parsing, i.e. it had only reached the end of an include file, 114 * or if it's DONE. 115 */ 116 #define CONTINUE 1 117 #define DONE 0 118 static Lst targets; /* targets we're working on */ 119 #ifdef CLEANUP 120 static Lst targCmds; /* command lines for targets */ 121 #endif 122 static Boolean inLine; /* true if currently in a dependency 123 * line or its commands */ 124 typedef struct { 125 char *str; 126 char *ptr; 127 } PTR; 128 129 static char *fname; /* name of current file (for errors) */ 130 static int lineno; /* line number in current file */ 131 static FILE *curFILE = NULL; /* current makefile */ 132 133 static PTR *curPTR = NULL; /* current makefile */ 134 135 static int fatals = 0; 136 137 static GNode *mainNode; /* The main target to create. This is the 138 * first target on the first dependency 139 * line in the first makefile */ 140 /* 141 * Definitions for handling #include specifications 142 */ 143 typedef struct IFile { 144 char *fname; /* name of previous file */ 145 int lineno; /* saved line number */ 146 FILE * F; /* the open stream */ 147 PTR * p; /* the char pointer */ 148 } IFile; 149 150 static Lst includes; /* stack of IFiles generated by 151 * #includes */ 152 Lst parseIncPath; /* list of directories for "..." includes */ 153 Lst sysIncPath; /* list of directories for <...> includes */ 154 155 /*- 156 * specType contains the SPECial TYPE of the current target. It is 157 * Not if the target is unspecial. If it *is* special, however, the children 158 * are linked as children of the parent but not vice versa. This variable is 159 * set in ParseDoDependency 160 */ 161 typedef enum { 162 Begin, /* .BEGIN */ 163 Default, /* .DEFAULT */ 164 End, /* .END */ 165 Ignore, /* .IGNORE */ 166 Includes, /* .INCLUDES */ 167 Interrupt, /* .INTERRUPT */ 168 Libs, /* .LIBS */ 169 MFlags, /* .MFLAGS or .MAKEFLAGS */ 170 Main, /* .MAIN and we don't have anything user-specified to 171 * make */ 172 NoExport, /* .NOEXPORT */ 173 NoPath, /* .NOPATH */ 174 Not, /* Not special */ 175 NotParallel, /* .NOTPARALELL */ 176 Null, /* .NULL */ 177 Order, /* .ORDER */ 178 Parallel, /* .PARALLEL */ 179 ExPath, /* .PATH */ 180 Phony, /* .PHONY */ 181 #ifdef POSIX 182 Posix, /* .POSIX */ 183 #endif 184 Precious, /* .PRECIOUS */ 185 ExShell, /* .SHELL */ 186 Silent, /* .SILENT */ 187 SingleShell, /* .SINGLESHELL */ 188 Suffixes, /* .SUFFIXES */ 189 Wait, /* .WAIT */ 190 Attribute /* Generic attribute */ 191 } ParseSpecial; 192 193 static ParseSpecial specType; 194 static int waiting; 195 196 /* 197 * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER 198 * seen, then set to each successive source on the line. 199 */ 200 static GNode *predecessor; 201 202 /* 203 * The parseKeywords table is searched using binary search when deciding 204 * if a target or source is special. The 'spec' field is the ParseSpecial 205 * type of the keyword ("Not" if the keyword isn't special as a target) while 206 * the 'op' field is the operator to apply to the list of targets if the 207 * keyword is used as a source ("0" if the keyword isn't special as a source) 208 */ 209 static struct { 210 char *name; /* Name of keyword */ 211 ParseSpecial spec; /* Type when used as a target */ 212 int op; /* Operator when used as a source */ 213 } parseKeywords[] = { 214 { ".BEGIN", Begin, 0 }, 215 { ".DEFAULT", Default, 0 }, 216 { ".END", End, 0 }, 217 { ".EXEC", Attribute, OP_EXEC }, 218 { ".IGNORE", Ignore, OP_IGNORE }, 219 { ".INCLUDES", Includes, 0 }, 220 { ".INTERRUPT", Interrupt, 0 }, 221 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 222 { ".JOIN", Attribute, OP_JOIN }, 223 { ".LIBS", Libs, 0 }, 224 { ".MADE", Attribute, OP_MADE }, 225 { ".MAIN", Main, 0 }, 226 { ".MAKE", Attribute, OP_MAKE }, 227 { ".MAKEFLAGS", MFlags, 0 }, 228 { ".MFLAGS", MFlags, 0 }, 229 { ".NOPATH", NoPath, OP_NOPATH }, 230 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 231 { ".NOTPARALLEL", NotParallel, 0 }, 232 { ".NO_PARALLEL", NotParallel, 0 }, 233 { ".NULL", Null, 0 }, 234 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 235 { ".ORDER", Order, 0 }, 236 { ".PARALLEL", Parallel, 0 }, 237 { ".PATH", ExPath, 0 }, 238 { ".PHONY", Phony, OP_PHONY }, 239 #ifdef POSIX 240 { ".POSIX", Posix, 0 }, 241 #endif 242 { ".PRECIOUS", Precious, OP_PRECIOUS }, 243 { ".RECURSIVE", Attribute, OP_MAKE }, 244 { ".SHELL", ExShell, 0 }, 245 { ".SILENT", Silent, OP_SILENT }, 246 { ".SINGLESHELL", SingleShell, 0 }, 247 { ".SUFFIXES", Suffixes, 0 }, 248 { ".USE", Attribute, OP_USE }, 249 { ".WAIT", Wait, 0 }, 250 }; 251 252 static void ParseErrorInternal __P((char *, size_t, int, char *, ...)); 253 static void ParseVErrorInternal __P((char *, size_t, int, char *, va_list)); 254 static int ParseFindKeyword __P((char *)); 255 static int ParseLinkSrc __P((ClientData, ClientData)); 256 static int ParseDoOp __P((ClientData, ClientData)); 257 static int ParseAddDep __P((ClientData, ClientData)); 258 static void ParseDoSrc __P((int, char *, Lst)); 259 static int ParseFindMain __P((ClientData, ClientData)); 260 static int ParseAddDir __P((ClientData, ClientData)); 261 static int ParseClearPath __P((ClientData, ClientData)); 262 static void ParseDoDependency __P((char *)); 263 static int ParseAddCmd __P((ClientData, ClientData)); 264 static __inline int ParseReadc __P((void)); 265 static void ParseUnreadc __P((int)); 266 static void ParseHasCommands __P((ClientData)); 267 static void ParseDoInclude __P((char *)); 268 static void ParseSetParseFile __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 * ParseVErrorInternal -- 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 static void 330 #ifdef __STDC__ 331 ParseVErrorInternal(char *cfname, size_t clineno, int type, char *fmt, 332 va_list ap) 333 #else 334 ParseVErrorInternal(va_alist) 335 va_dcl 336 #endif 337 { 338 (void)fprintf(stderr, "\"%s\", line %d: ", cfname, (int) clineno); 339 if (type == PARSE_WARNING) 340 (void)fprintf(stderr, "warning: "); 341 (void)vfprintf(stderr, fmt, ap); 342 va_end(ap); 343 (void)fprintf(stderr, "\n"); 344 (void)fflush(stderr); 345 if (type == PARSE_FATAL) 346 fatals += 1; 347 } 348 349 /*- 350 * ParseErrorInternal -- 351 * Error function 352 * 353 * Results: 354 * None 355 * 356 * Side Effects: 357 * None 358 */ 359 /* VARARGS */ 360 static void 361 #ifdef __STDC__ 362 ParseErrorInternal(char *cfname, size_t clineno, int type, char *fmt, ...) 363 #else 364 ParseErrorInternal(va_alist) 365 va_dcl 366 #endif 367 { 368 va_list ap; 369 #ifdef __STDC__ 370 va_start(ap, fmt); 371 #else 372 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 373 char *fmt; 374 char *cfname; 375 size_t clineno; 376 377 va_start(ap); 378 cfname = va_arg(ap, char *); 379 clineno = va_arg(ap, size_t); 380 type = va_arg(ap, int); 381 fmt = va_arg(ap, char *); 382 #endif 383 384 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 385 va_end(ap); 386 } 387 388 /*- 389 * Parse_Error -- 390 * External interface to ParseErrorInternal; uses the default filename 391 * Line number. 392 * 393 * Results: 394 * None 395 * 396 * Side Effects: 397 * None 398 */ 399 /* VARARGS */ 400 void 401 #ifdef __STDC__ 402 Parse_Error(int type, char *fmt, ...) 403 #else 404 Parse_Error(va_alist) 405 va_dcl 406 #endif 407 { 408 va_list ap; 409 #ifdef __STDC__ 410 va_start(ap, fmt); 411 #else 412 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 413 char *fmt; 414 415 va_start(ap); 416 type = va_arg(ap, int); 417 fmt = va_arg(ap, char *); 418 #endif 419 ParseVErrorInternal(fname, lineno, type, fmt, ap); 420 va_end(ap); 421 } 422 423 /*- 424 *--------------------------------------------------------------------- 425 * ParseLinkSrc -- 426 * Link the parent node to its new child. Used in a Lst_ForEach by 427 * ParseDoDependency. If the specType isn't 'Not', the parent 428 * isn't linked as a parent of the child. 429 * 430 * Results: 431 * Always = 0 432 * 433 * Side Effects: 434 * New elements are added to the parents list of cgn and the 435 * children list of cgn. the unmade field of pgn is updated 436 * to reflect the additional child. 437 *--------------------------------------------------------------------- 438 */ 439 static int 440 ParseLinkSrc (pgnp, cgnp) 441 ClientData pgnp; /* The parent node */ 442 ClientData cgnp; /* The child node */ 443 { 444 GNode *pgn = (GNode *) pgnp; 445 GNode *cgn = (GNode *) cgnp; 446 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 447 pgn = (GNode *) Lst_Datum (Lst_Last (pgn->cohorts)); 448 if (Lst_Member (pgn->children, (ClientData)cgn) == NILLNODE) { 449 (void)Lst_AtEnd (pgn->children, (ClientData)cgn); 450 if (specType == Not) { 451 (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); 452 } 453 pgn->unmade += 1; 454 } 455 return (0); 456 } 457 458 /*- 459 *--------------------------------------------------------------------- 460 * ParseDoOp -- 461 * Apply the parsed operator to the given target node. Used in a 462 * Lst_ForEach call by ParseDoDependency once all targets have 463 * been found and their operator parsed. If the previous and new 464 * operators are incompatible, a major error is taken. 465 * 466 * Results: 467 * Always 0 468 * 469 * Side Effects: 470 * The type field of the node is altered to reflect any new bits in 471 * the op. 472 *--------------------------------------------------------------------- 473 */ 474 static int 475 ParseDoOp (gnp, opp) 476 ClientData gnp; /* The node to which the operator is to be 477 * applied */ 478 ClientData opp; /* The operator to apply */ 479 { 480 GNode *gn = (GNode *) gnp; 481 int op = *(int *) opp; 482 /* 483 * If the dependency mask of the operator and the node don't match and 484 * the node has actually had an operator applied to it before, and 485 * the operator actually has some dependency information in it, complain. 486 */ 487 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 488 !OP_NOP(gn->type) && !OP_NOP(op)) 489 { 490 Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name); 491 return (1); 492 } 493 494 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 495 /* 496 * If the node was the object of a :: operator, we need to create a 497 * new instance of it for the children and commands on this dependency 498 * line. The new instance is placed on the 'cohorts' list of the 499 * initial one (note the initial one is not on its own cohorts list) 500 * and the new instance is linked to all parents of the initial 501 * instance. 502 */ 503 register GNode *cohort; 504 505 /* 506 * Propagate copied bits to the initial node. They'll be propagated 507 * back to the rest of the cohorts later. 508 */ 509 gn->type |= op & ~OP_OPMASK; 510 511 cohort = Targ_NewGN(gn->name); 512 /* 513 * Make the cohort invisible as well to avoid duplicating it into 514 * other variables. True, parents of this target won't tend to do 515 * anything with their local variables, but better safe than 516 * sorry. (I think this is pointless now, since the relevant list 517 * traversals will no longer see this node anyway. -mycroft) 518 */ 519 cohort->type = op | OP_INVISIBLE; 520 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 521 } else { 522 /* 523 * We don't want to nuke any previous flags (whatever they were) so we 524 * just OR the new operator into the old 525 */ 526 gn->type |= op; 527 } 528 529 return (0); 530 } 531 532 /*- 533 *--------------------------------------------------------------------- 534 * ParseAddDep -- 535 * Check if the pair of GNodes given needs to be synchronized. 536 * This has to be when two nodes are on different sides of a 537 * .WAIT directive. 538 * 539 * Results: 540 * Returns 1 if the two targets need to be ordered, 0 otherwise. 541 * If it returns 1, the search can stop 542 * 543 * Side Effects: 544 * A dependency can be added between the two nodes. 545 * 546 *--------------------------------------------------------------------- 547 */ 548 static int 549 ParseAddDep(pp, sp) 550 ClientData pp; 551 ClientData sp; 552 { 553 GNode *p = (GNode *) pp; 554 GNode *s = (GNode *) sp; 555 556 if (p->order < s->order) { 557 /* 558 * XXX: This can cause loops, and loops can cause unmade targets, 559 * but checking is tedious, and the debugging output can show the 560 * problem 561 */ 562 (void)Lst_AtEnd(p->successors, (ClientData)s); 563 (void)Lst_AtEnd(s->preds, (ClientData)p); 564 return 0; 565 } 566 else 567 return 1; 568 } 569 570 571 /*- 572 *--------------------------------------------------------------------- 573 * ParseDoSrc -- 574 * Given the name of a source, figure out if it is an attribute 575 * and apply it to the targets if it is. Else decide if there is 576 * some attribute which should be applied *to* the source because 577 * of some special target and apply it if so. Otherwise, make the 578 * source be a child of the targets in the list 'targets' 579 * 580 * Results: 581 * None 582 * 583 * Side Effects: 584 * Operator bits may be added to the list of targets or to the source. 585 * The targets may have a new source added to their lists of children. 586 *--------------------------------------------------------------------- 587 */ 588 static void 589 ParseDoSrc (tOp, src, allsrc) 590 int tOp; /* operator (if any) from special targets */ 591 char *src; /* name of the source to handle */ 592 Lst allsrc; /* List of all sources to wait for */ 593 594 { 595 GNode *gn = NULL; 596 597 if (*src == '.' && isupper ((unsigned char)src[1])) { 598 int keywd = ParseFindKeyword(src); 599 if (keywd != -1) { 600 int op = parseKeywords[keywd].op; 601 if (op != 0) { 602 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 603 return; 604 } 605 if (parseKeywords[keywd].spec == Wait) { 606 waiting++; 607 return; 608 } 609 } 610 } 611 612 switch (specType) { 613 case Main: 614 /* 615 * If we have noted the existence of a .MAIN, it means we need 616 * to add the sources of said target to the list of things 617 * to create. The string 'src' is likely to be free, so we 618 * must make a new copy of it. Note that this will only be 619 * invoked if the user didn't specify a target on the command 620 * line. This is to allow #ifmake's to succeed, or something... 621 */ 622 (void) Lst_AtEnd (create, (ClientData)estrdup(src)); 623 /* 624 * Add the name to the .TARGETS variable as well, so the user cna 625 * employ that, if desired. 626 */ 627 Var_Append(".TARGETS", src, VAR_GLOBAL); 628 return; 629 630 case Order: 631 /* 632 * Create proper predecessor/successor links between the previous 633 * source and the current one. 634 */ 635 gn = Targ_FindNode(src, TARG_CREATE); 636 if (predecessor != NILGNODE) { 637 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 638 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 639 } 640 /* 641 * The current source now becomes the predecessor for the next one. 642 */ 643 predecessor = gn; 644 break; 645 646 default: 647 /* 648 * If the source is not an attribute, we need to find/create 649 * a node for it. After that we can apply any operator to it 650 * from a special target or link it to its parents, as 651 * appropriate. 652 * 653 * In the case of a source that was the object of a :: operator, 654 * the attribute is applied to all of its instances (as kept in 655 * the 'cohorts' list of the node) or all the cohorts are linked 656 * to all the targets. 657 */ 658 gn = Targ_FindNode (src, TARG_CREATE); 659 if (tOp) { 660 gn->type |= tOp; 661 } else { 662 Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); 663 } 664 break; 665 } 666 667 gn->order = waiting; 668 (void)Lst_AtEnd(allsrc, (ClientData)gn); 669 if (waiting) { 670 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 671 } 672 } 673 674 /*- 675 *----------------------------------------------------------------------- 676 * ParseFindMain -- 677 * Find a real target in the list and set it to be the main one. 678 * Called by ParseDoDependency when a main target hasn't been found 679 * yet. 680 * 681 * Results: 682 * 0 if main not found yet, 1 if it is. 683 * 684 * Side Effects: 685 * mainNode is changed and Targ_SetMain is called. 686 * 687 *----------------------------------------------------------------------- 688 */ 689 static int 690 ParseFindMain(gnp, dummy) 691 ClientData gnp; /* Node to examine */ 692 ClientData dummy; 693 { 694 GNode *gn = (GNode *) gnp; 695 if ((gn->type & OP_NOTARGET) == 0) { 696 mainNode = gn; 697 Targ_SetMain(gn); 698 return (dummy ? 1 : 1); 699 } else { 700 return (dummy ? 0 : 0); 701 } 702 } 703 704 /*- 705 *----------------------------------------------------------------------- 706 * ParseAddDir -- 707 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 708 * 709 * Results: 710 * === 0 711 * 712 * Side Effects: 713 * See Dir_AddDir. 714 * 715 *----------------------------------------------------------------------- 716 */ 717 static int 718 ParseAddDir(path, name) 719 ClientData path; 720 ClientData name; 721 { 722 (void) Dir_AddDir((Lst) path, (char *) name); 723 return(0); 724 } 725 726 /*- 727 *----------------------------------------------------------------------- 728 * ParseClearPath -- 729 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 730 * 731 * Results: 732 * === 0 733 * 734 * Side Effects: 735 * See Dir_ClearPath 736 * 737 *----------------------------------------------------------------------- 738 */ 739 static int 740 ParseClearPath(path, dummy) 741 ClientData path; 742 ClientData dummy; 743 { 744 Dir_ClearPath((Lst) path); 745 return(dummy ? 0 : 0); 746 } 747 748 /*- 749 *--------------------------------------------------------------------- 750 * ParseDoDependency -- 751 * Parse the dependency line in line. 752 * 753 * Results: 754 * None 755 * 756 * Side Effects: 757 * The nodes of the sources are linked as children to the nodes of the 758 * targets. Some nodes may be created. 759 * 760 * We parse a dependency line by first extracting words from the line and 761 * finding nodes in the list of all targets with that name. This is done 762 * until a character is encountered which is an operator character. Currently 763 * these are only ! and :. At this point the operator is parsed and the 764 * pointer into the line advanced until the first source is encountered. 765 * The parsed operator is applied to each node in the 'targets' list, 766 * which is where the nodes found for the targets are kept, by means of 767 * the ParseDoOp function. 768 * The sources are read in much the same way as the targets were except 769 * that now they are expanded using the wildcarding scheme of the C-Shell 770 * and all instances of the resulting words in the list of all targets 771 * are found. Each of the resulting nodes is then linked to each of the 772 * targets as one of its children. 773 * Certain targets are handled specially. These are the ones detailed 774 * by the specType variable. 775 * The storing of transformation rules is also taken care of here. 776 * A target is recognized as a transformation rule by calling 777 * Suff_IsTransform. If it is a transformation rule, its node is gotten 778 * from the suffix module via Suff_AddTransform rather than the standard 779 * Targ_FindNode in the target module. 780 *--------------------------------------------------------------------- 781 */ 782 static void 783 ParseDoDependency (line) 784 char *line; /* the line to parse */ 785 { 786 char *cp; /* our current position */ 787 GNode *gn; /* a general purpose temporary node */ 788 int op; /* the operator on the line */ 789 char savec; /* a place to save a character */ 790 Lst paths; /* List of search paths to alter when parsing 791 * a list of .PATH targets */ 792 int tOp; /* operator from special target */ 793 Lst sources; /* list of archive source names after 794 * expansion */ 795 Lst curTargs; /* list of target names to be found and added 796 * to the targets list */ 797 Lst curSrcs; /* list of sources in order */ 798 799 tOp = 0; 800 801 specType = Not; 802 waiting = 0; 803 paths = (Lst)NULL; 804 805 curTargs = Lst_Init(FALSE); 806 curSrcs = Lst_Init(FALSE); 807 808 do { 809 for (cp = line; 810 *cp && !isspace ((unsigned char)*cp) && 811 (*cp != '!') && (*cp != ':') && (*cp != '('); 812 cp++) 813 { 814 if (*cp == '$') { 815 /* 816 * Must be a dynamic source (would have been expanded 817 * otherwise), so call the Var module to parse the puppy 818 * so we can safely advance beyond it...There should be 819 * no errors in this, as they would have been discovered 820 * in the initial Var_Subst and we wouldn't be here. 821 */ 822 int length; 823 Boolean freeIt; 824 char *result; 825 826 result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 827 828 if (freeIt) { 829 free(result); 830 } 831 cp += length-1; 832 } 833 continue; 834 } 835 if (*cp == '(') { 836 /* 837 * Archives must be handled specially to make sure the OP_ARCHV 838 * flag is set in their 'type' field, for one thing, and because 839 * things like "archive(file1.o file2.o file3.o)" are permissible. 840 * Arch_ParseArchive will set 'line' to be the first non-blank 841 * after the archive-spec. It creates/finds nodes for the members 842 * and places them on the given list, returning SUCCESS if all 843 * went well and FAILURE if there was an error in the 844 * specification. On error, line should remain untouched. 845 */ 846 if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { 847 Parse_Error (PARSE_FATAL, 848 "Error in archive specification: \"%s\"", line); 849 return; 850 } else { 851 continue; 852 } 853 } 854 savec = *cp; 855 856 if (!*cp) { 857 /* 858 * Ending a dependency line without an operator is a Bozo 859 * no-no 860 */ 861 Parse_Error (PARSE_FATAL, "Need an operator"); 862 return; 863 } 864 *cp = '\0'; 865 /* 866 * Have a word in line. See if it's a special target and set 867 * specType to match it. 868 */ 869 if (*line == '.' && isupper ((unsigned char)line[1])) { 870 /* 871 * See if the target is a special target that must have it 872 * or its sources handled specially. 873 */ 874 int keywd = ParseFindKeyword(line); 875 if (keywd != -1) { 876 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 877 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 878 return; 879 } 880 881 specType = parseKeywords[keywd].spec; 882 tOp = parseKeywords[keywd].op; 883 884 /* 885 * Certain special targets have special semantics: 886 * .PATH Have to set the dirSearchPath 887 * variable too 888 * .MAIN Its sources are only used if 889 * nothing has been specified to 890 * create. 891 * .DEFAULT Need to create a node to hang 892 * commands on, but we don't want 893 * it in the graph, nor do we want 894 * it to be the Main Target, so we 895 * create it, set OP_NOTMAIN and 896 * add it to the list, setting 897 * DEFAULT to the new node for 898 * later use. We claim the node is 899 * A transformation rule to make 900 * life easier later, when we'll 901 * use Make_HandleUse to actually 902 * apply the .DEFAULT commands. 903 * .PHONY The list of targets 904 * .NOPATH Don't search for file in the path 905 * .BEGIN 906 * .END 907 * .INTERRUPT Are not to be considered the 908 * main target. 909 * .NOTPARALLEL Make only one target at a time. 910 * .SINGLESHELL Create a shell for each command. 911 * .ORDER Must set initial predecessor to NIL 912 */ 913 switch (specType) { 914 case ExPath: 915 if (paths == NULL) { 916 paths = Lst_Init(FALSE); 917 } 918 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 919 break; 920 case Main: 921 if (!Lst_IsEmpty(create)) { 922 specType = Not; 923 } 924 break; 925 case Begin: 926 case End: 927 case Interrupt: 928 gn = Targ_FindNode(line, TARG_CREATE); 929 gn->type |= OP_NOTMAIN; 930 (void)Lst_AtEnd(targets, (ClientData)gn); 931 break; 932 case Default: 933 gn = Targ_NewGN(".DEFAULT"); 934 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 935 (void)Lst_AtEnd(targets, (ClientData)gn); 936 DEFAULT = gn; 937 break; 938 case NotParallel: 939 { 940 extern int maxJobs; 941 942 maxJobs = 1; 943 break; 944 } 945 case SingleShell: 946 compatMake = 1; 947 break; 948 case Order: 949 predecessor = NILGNODE; 950 break; 951 default: 952 break; 953 } 954 } else if (strncmp (line, ".PATH", 5) == 0) { 955 /* 956 * .PATH<suffix> has to be handled specially. 957 * Call on the suffix module to give us a path to 958 * modify. 959 */ 960 Lst path; 961 962 specType = ExPath; 963 path = Suff_GetPath (&line[5]); 964 if (path == NILLST) { 965 Parse_Error (PARSE_FATAL, 966 "Suffix '%s' not defined (yet)", 967 &line[5]); 968 return; 969 } else { 970 if (paths == (Lst)NULL) { 971 paths = Lst_Init(FALSE); 972 } 973 (void)Lst_AtEnd(paths, (ClientData)path); 974 } 975 } 976 } 977 978 /* 979 * Have word in line. Get or create its node and stick it at 980 * the end of the targets list 981 */ 982 if ((specType == Not) && (*line != '\0')) { 983 if (Dir_HasWildcards(line)) { 984 /* 985 * Targets are to be sought only in the current directory, 986 * so create an empty path for the thing. Note we need to 987 * use Dir_Destroy in the destruction of the path as the 988 * Dir module could have added a directory to the path... 989 */ 990 Lst emptyPath = Lst_Init(FALSE); 991 992 Dir_Expand(line, emptyPath, curTargs); 993 994 Lst_Destroy(emptyPath, Dir_Destroy); 995 } else { 996 /* 997 * No wildcards, but we want to avoid code duplication, 998 * so create a list with the word on it. 999 */ 1000 (void)Lst_AtEnd(curTargs, (ClientData)line); 1001 } 1002 1003 while(!Lst_IsEmpty(curTargs)) { 1004 char *targName = (char *)Lst_DeQueue(curTargs); 1005 1006 if (!Suff_IsTransform (targName)) { 1007 gn = Targ_FindNode (targName, TARG_CREATE); 1008 } else { 1009 gn = Suff_AddTransform (targName); 1010 } 1011 1012 (void)Lst_AtEnd (targets, (ClientData)gn); 1013 } 1014 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1015 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1016 } 1017 1018 *cp = savec; 1019 /* 1020 * If it is a special type and not .PATH, it's the only target we 1021 * allow on this line... 1022 */ 1023 if (specType != Not && specType != ExPath) { 1024 Boolean warn = FALSE; 1025 1026 while ((*cp != '!') && (*cp != ':') && *cp) { 1027 if (*cp != ' ' && *cp != '\t') { 1028 warn = TRUE; 1029 } 1030 cp++; 1031 } 1032 if (warn) { 1033 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1034 } 1035 } else { 1036 while (*cp && isspace ((unsigned char)*cp)) { 1037 cp++; 1038 } 1039 } 1040 line = cp; 1041 } while ((*line != '!') && (*line != ':') && *line); 1042 1043 /* 1044 * Don't need the list of target names anymore... 1045 */ 1046 Lst_Destroy(curTargs, NOFREE); 1047 1048 if (!Lst_IsEmpty(targets)) { 1049 switch(specType) { 1050 default: 1051 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1052 break; 1053 case Default: 1054 case Begin: 1055 case End: 1056 case Interrupt: 1057 /* 1058 * These four create nodes on which to hang commands, so 1059 * targets shouldn't be empty... 1060 */ 1061 case Not: 1062 /* 1063 * Nothing special here -- targets can be empty if it wants. 1064 */ 1065 break; 1066 } 1067 } 1068 1069 /* 1070 * Have now parsed all the target names. Must parse the operator next. The 1071 * result is left in op . 1072 */ 1073 if (*cp == '!') { 1074 op = OP_FORCE; 1075 } else if (*cp == ':') { 1076 if (cp[1] == ':') { 1077 op = OP_DOUBLEDEP; 1078 cp++; 1079 } else { 1080 op = OP_DEPENDS; 1081 } 1082 } else { 1083 Parse_Error (PARSE_FATAL, "Missing dependency operator"); 1084 return; 1085 } 1086 1087 cp++; /* Advance beyond operator */ 1088 1089 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 1090 1091 /* 1092 * Get to the first source 1093 */ 1094 while (*cp && isspace ((unsigned char)*cp)) { 1095 cp++; 1096 } 1097 line = cp; 1098 1099 /* 1100 * Several special targets take different actions if present with no 1101 * sources: 1102 * a .SUFFIXES line with no sources clears out all old suffixes 1103 * a .PRECIOUS line makes all targets precious 1104 * a .IGNORE line ignores errors for all targets 1105 * a .SILENT line creates silence when making all targets 1106 * a .PATH removes all directories from the search path(s). 1107 */ 1108 if (!*line) { 1109 switch (specType) { 1110 case Suffixes: 1111 Suff_ClearSuffixes (); 1112 break; 1113 case Precious: 1114 allPrecious = TRUE; 1115 break; 1116 case Ignore: 1117 ignoreErrors = TRUE; 1118 break; 1119 case Silent: 1120 beSilent = TRUE; 1121 break; 1122 case ExPath: 1123 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1124 break; 1125 #ifdef POSIX 1126 case Posix: 1127 Var_Set("%POSIX", "1003.2", VAR_GLOBAL); 1128 break; 1129 #endif 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 } 1150 1151 /* 1152 * NOW GO FOR THE SOURCES 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 ((unsigned char)*cp)) { 1185 cp++; 1186 } 1187 savec = *cp; 1188 *cp = '\0'; 1189 switch (specType) { 1190 case Suffixes: 1191 Suff_AddSuffix (line, &mainNode); 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 ((unsigned char)*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 ((unsigned char)*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); 1253 ParseDoSrc (tOp, gn->name, curSrcs); 1254 } 1255 Lst_Destroy (sources, NOFREE); 1256 cp = line; 1257 } else { 1258 if (*cp) { 1259 *cp = '\0'; 1260 cp += 1; 1261 } 1262 1263 ParseDoSrc (tOp, line, curSrcs); 1264 } 1265 while (*cp && isspace ((unsigned char)*cp)) { 1266 cp++; 1267 } 1268 line = cp; 1269 } 1270 } 1271 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 1282 /* 1283 * Finally, destroy the list of sources 1284 */ 1285 Lst_Destroy(curSrcs, NOFREE); 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 */ 1317 for (;(*line == ' ') || (*line == '\t'); line++) 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 1332 * only one word before the operator 1333 */ 1334 wasSpace = TRUE; 1335 break; 1336 1337 case '(': 1338 case '{': 1339 level++; 1340 break; 1341 1342 case '}': 1343 case ')': 1344 level--; 1345 break; 1346 1347 default: 1348 if (wasSpace && haveName) { 1349 if (ISEQOPERATOR(*line)) { 1350 /* 1351 * We must have a finished word 1352 */ 1353 if (level != 0) 1354 return FALSE; 1355 1356 /* 1357 * When an = operator [+?!:] is found, the next 1358 * character must be an = or it ain't a valid 1359 * assignment. 1360 */ 1361 if (line[1] == '=') 1362 return haveName; 1363 #ifdef SUNSHCMD 1364 /* 1365 * This is a shell command 1366 */ 1367 if (strncmp(line, ":sh", 3) == 0) 1368 return haveName; 1369 #endif 1370 } 1371 /* 1372 * This is the start of another word, so not assignment. 1373 */ 1374 return FALSE; 1375 } 1376 else { 1377 haveName = TRUE; 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 */ 1416 char *opc; /* ptr to operator character to 1417 * null-terminate the variable name */ 1418 /* 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 ((unsigned char)*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: 1477 #ifdef SUNSHCMD 1478 while (opc > line && *opc != ':') 1479 opc--; 1480 1481 if (strncmp(opc, ":sh", 3) == 0) { 1482 type = VAR_SHELL; 1483 *opc = '\0'; 1484 break; 1485 } 1486 #endif 1487 type = VAR_NORMAL; 1488 break; 1489 } 1490 1491 while (isspace ((unsigned char)*cp)) { 1492 cp++; 1493 } 1494 1495 if (type == VAR_APPEND) { 1496 Var_Append (line, cp, ctxt); 1497 } else if (type == VAR_SUBST) { 1498 /* 1499 * Allow variables in the old value to be undefined, but leave their 1500 * invocation alone -- this is done by forcing oldVars to be false. 1501 * XXX: This can cause recursive variables, but that's not hard to do, 1502 * and this allows someone to do something like 1503 * 1504 * CFLAGS = $(.INCLUDES) 1505 * CFLAGS := -I.. $(CFLAGS) 1506 * 1507 * And not get an error. 1508 */ 1509 Boolean oldOldVars = oldVars; 1510 1511 oldVars = FALSE; 1512 1513 /* 1514 * make sure that we set the variable the first time to nothing 1515 * so that it gets substituted! 1516 */ 1517 if (!Var_Exists(line, ctxt)) 1518 Var_Set(line, "", ctxt); 1519 1520 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1521 oldVars = oldOldVars; 1522 1523 Var_Set(line, cp, ctxt); 1524 free(cp); 1525 } else if (type == VAR_SHELL) { 1526 Boolean freeCmd = FALSE; /* TRUE if the command needs to be freed, i.e. 1527 * if any variable expansion was performed */ 1528 char *res, *err; 1529 1530 if (strchr(cp, '$') != NULL) { 1531 /* 1532 * There's a dollar sign in the command, so perform variable 1533 * expansion on the whole thing. The resulting string will need 1534 * freeing when we're done, so set freeCmd to TRUE. 1535 */ 1536 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1537 freeCmd = TRUE; 1538 } 1539 1540 res = Cmd_Exec(cp, &err); 1541 Var_Set(line, res, ctxt); 1542 free(res); 1543 1544 if (err) 1545 Parse_Error(PARSE_WARNING, err, cp); 1546 1547 if (freeCmd) 1548 free(cp); 1549 } else { 1550 /* 1551 * Normal assignment -- just do it. 1552 */ 1553 Var_Set(line, cp, ctxt); 1554 } 1555 } 1556 1557 1558 /*- 1559 * ParseAddCmd -- 1560 * Lst_ForEach function to add a command line to all targets 1561 * 1562 * Results: 1563 * Always 0 1564 * 1565 * Side Effects: 1566 * A new element is added to the commands list of the node. 1567 */ 1568 static int 1569 ParseAddCmd(gnp, cmd) 1570 ClientData gnp; /* the node to which the command is to be added */ 1571 ClientData cmd; /* the command to add */ 1572 { 1573 GNode *gn = (GNode *) gnp; 1574 /* if target already supplied, ignore commands */ 1575 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1576 gn = (GNode *) Lst_Datum (Lst_Last (gn->cohorts)); 1577 if (!(gn->type & OP_HAS_COMMANDS)) 1578 (void)Lst_AtEnd(gn->commands, cmd); 1579 return(0); 1580 } 1581 1582 /*- 1583 *----------------------------------------------------------------------- 1584 * ParseHasCommands -- 1585 * Callback procedure for Parse_File when destroying the list of 1586 * targets on the last dependency line. Marks a target as already 1587 * having commands if it does, to keep from having shell commands 1588 * on multiple dependency lines. 1589 * 1590 * Results: 1591 * None 1592 * 1593 * Side Effects: 1594 * OP_HAS_COMMANDS may be set for the target. 1595 * 1596 *----------------------------------------------------------------------- 1597 */ 1598 static void 1599 ParseHasCommands(gnp) 1600 ClientData gnp; /* Node to examine */ 1601 { 1602 GNode *gn = (GNode *) gnp; 1603 if (!Lst_IsEmpty(gn->commands)) { 1604 gn->type |= OP_HAS_COMMANDS; 1605 } 1606 } 1607 1608 /*- 1609 *----------------------------------------------------------------------- 1610 * Parse_AddIncludeDir -- 1611 * Add a directory to the path searched for included makefiles 1612 * bracketed by double-quotes. Used by functions in main.c 1613 * 1614 * Results: 1615 * None. 1616 * 1617 * Side Effects: 1618 * The directory is appended to the list. 1619 * 1620 *----------------------------------------------------------------------- 1621 */ 1622 void 1623 Parse_AddIncludeDir (dir) 1624 char *dir; /* The name of the directory to add */ 1625 { 1626 (void) Dir_AddDir (parseIncPath, dir); 1627 } 1628 1629 /*- 1630 *--------------------------------------------------------------------- 1631 * ParseDoInclude -- 1632 * Push to another file. 1633 * 1634 * The input is the line minus the `.'. A file spec is a string 1635 * enclosed in <> or "". The former is looked for only in sysIncPath. 1636 * The latter in . and the directories specified by -I command line 1637 * options 1638 * 1639 * Results: 1640 * None 1641 * 1642 * Side Effects: 1643 * A structure is added to the includes Lst and readProc, lineno, 1644 * fname and curFILE are altered for the new file 1645 *--------------------------------------------------------------------- 1646 */ 1647 static void 1648 ParseDoInclude (line) 1649 char *line; 1650 { 1651 char *fullname; /* full pathname of file */ 1652 IFile *oldFile; /* state associated with current file */ 1653 char endc; /* the character which ends the file spec */ 1654 char *cp; /* current position in file spec */ 1655 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1656 int silent = (*line != 'i') ? 1 : 0; 1657 char *file = &line[7 + silent]; 1658 1659 /* 1660 * Skip to delimiter character so we know where to look 1661 */ 1662 while ((*file == ' ') || (*file == '\t')) { 1663 file++; 1664 } 1665 1666 if ((*file != '"') && (*file != '<')) { 1667 Parse_Error (PARSE_FATAL, 1668 ".include filename must be delimited by '\"' or '<'"); 1669 return; 1670 } 1671 1672 /* 1673 * Set the search path on which to find the include file based on the 1674 * characters which bracket its name. Angle-brackets imply it's 1675 * a system Makefile while double-quotes imply it's a user makefile 1676 */ 1677 if (*file == '<') { 1678 isSystem = TRUE; 1679 endc = '>'; 1680 } else { 1681 isSystem = FALSE; 1682 endc = '"'; 1683 } 1684 1685 /* 1686 * Skip to matching delimiter 1687 */ 1688 for (cp = ++file; *cp && *cp != endc; cp++) { 1689 continue; 1690 } 1691 1692 if (*cp != endc) { 1693 Parse_Error (PARSE_FATAL, 1694 "Unclosed %cinclude filename. '%c' expected", 1695 '.', endc); 1696 return; 1697 } 1698 *cp = '\0'; 1699 1700 /* 1701 * Substitute for any variables in the file name before trying to 1702 * find the thing. 1703 */ 1704 file = Var_Subst (NULL, file, VAR_CMD, FALSE); 1705 1706 /* 1707 * Now we know the file's name and its search path, we attempt to 1708 * find the durn thing. A return of NULL indicates the file don't 1709 * exist. 1710 */ 1711 if (!isSystem) { 1712 /* 1713 * Include files contained in double-quotes are first searched for 1714 * relative to the including file's location. We don't want to 1715 * cd there, of course, so we just tack on the old file's 1716 * leading path components and call Dir_FindFile to see if 1717 * we can locate the beast. 1718 */ 1719 char *prefEnd, *Fname; 1720 1721 /* Make a temporary copy of this, to be safe. */ 1722 Fname = estrdup(fname); 1723 1724 prefEnd = strrchr (Fname, '/'); 1725 if (prefEnd != (char *)NULL) { 1726 char *newName; 1727 1728 *prefEnd = '\0'; 1729 if (file[0] == '/') 1730 newName = estrdup(file); 1731 else 1732 newName = str_concat (Fname, file, STR_ADDSLASH); 1733 fullname = Dir_FindFile (newName, parseIncPath); 1734 if (fullname == (char *)NULL) { 1735 fullname = Dir_FindFile(newName, dirSearchPath); 1736 } 1737 free (newName); 1738 *prefEnd = '/'; 1739 } else { 1740 fullname = (char *)NULL; 1741 } 1742 free (Fname); 1743 } else { 1744 fullname = (char *)NULL; 1745 } 1746 1747 if (fullname == (char *)NULL) { 1748 /* 1749 * System makefile or makefile wasn't found in same directory as 1750 * included makefile. Search for it first on the -I search path, 1751 * then on the .PATH search path, if not found in a -I directory. 1752 * XXX: Suffix specific? 1753 */ 1754 fullname = Dir_FindFile (file, parseIncPath); 1755 if (fullname == (char *)NULL) { 1756 fullname = Dir_FindFile(file, dirSearchPath); 1757 } 1758 } 1759 1760 if (fullname == (char *)NULL) { 1761 /* 1762 * Still haven't found the makefile. Look for it on the system 1763 * path as a last resort. 1764 */ 1765 fullname = Dir_FindFile(file, sysIncPath); 1766 } 1767 1768 if (fullname == (char *) NULL) { 1769 *cp = endc; 1770 if (!silent) 1771 Parse_Error (PARSE_FATAL, "Could not find %s", file); 1772 return; 1773 } 1774 1775 free(file); 1776 1777 /* 1778 * Once we find the absolute path to the file, we get to save all the 1779 * state from the current file before we can start reading this 1780 * include file. The state is stored in an IFile structure which 1781 * is placed on a list with other IFile structures. The list makes 1782 * a very nice stack to track how we got here... 1783 */ 1784 oldFile = (IFile *) emalloc (sizeof (IFile)); 1785 oldFile->fname = fname; 1786 1787 oldFile->F = curFILE; 1788 oldFile->p = curPTR; 1789 oldFile->lineno = lineno; 1790 1791 (void) Lst_AtFront (includes, (ClientData)oldFile); 1792 1793 /* 1794 * Once the previous state has been saved, we can get down to reading 1795 * the new file. We set up the name of the file to be the absolute 1796 * name of the include file so error messages refer to the right 1797 * place. Naturally enough, we start reading at line number 0. 1798 */ 1799 fname = fullname; 1800 lineno = 0; 1801 1802 ParseSetParseFile(fname); 1803 1804 curFILE = fopen (fullname, "r"); 1805 curPTR = NULL; 1806 if (curFILE == (FILE * ) NULL) { 1807 if (!silent) 1808 Parse_Error (PARSE_FATAL, "Cannot open %s", fullname); 1809 /* 1810 * Pop to previous file 1811 */ 1812 (void) ParseEOF(0); 1813 } 1814 } 1815 1816 1817 /*- 1818 *--------------------------------------------------------------------- 1819 * ParseSetParseFile -- 1820 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 1821 * basename of the given filename 1822 * 1823 * Results: 1824 * None 1825 * 1826 * Side Effects: 1827 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 1828 * dirname and basename of the given filename. 1829 *--------------------------------------------------------------------- 1830 */ 1831 static void 1832 ParseSetParseFile(fname) 1833 char *fname; 1834 { 1835 char *slash; 1836 1837 slash = strrchr(fname, '/'); 1838 if (slash == 0) { 1839 Var_Set(".PARSEDIR", ".", VAR_GLOBAL); 1840 Var_Set(".PARSEFILE", fname, VAR_GLOBAL); 1841 } else { 1842 *slash = '\0'; 1843 Var_Set(".PARSEDIR", fname, VAR_GLOBAL); 1844 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL); 1845 *slash = '/'; 1846 } 1847 } 1848 1849 1850 /*- 1851 *--------------------------------------------------------------------- 1852 * Parse_FromString -- 1853 * Start Parsing from the given string 1854 * 1855 * Results: 1856 * None 1857 * 1858 * Side Effects: 1859 * A structure is added to the includes Lst and readProc, lineno, 1860 * fname and curFILE are altered for the new file 1861 *--------------------------------------------------------------------- 1862 */ 1863 void 1864 Parse_FromString(str) 1865 char *str; 1866 { 1867 IFile *oldFile; /* state associated with this file */ 1868 1869 if (DEBUG(FOR)) 1870 (void) fprintf(stderr, "%s\n----\n", str); 1871 1872 oldFile = (IFile *) emalloc (sizeof (IFile)); 1873 oldFile->lineno = lineno; 1874 oldFile->fname = fname; 1875 oldFile->F = curFILE; 1876 oldFile->p = curPTR; 1877 1878 (void) Lst_AtFront (includes, (ClientData)oldFile); 1879 1880 curFILE = NULL; 1881 curPTR = (PTR *) emalloc (sizeof (PTR)); 1882 curPTR->str = curPTR->ptr = str; 1883 lineno = 0; 1884 fname = estrdup(fname); 1885 } 1886 1887 1888 #ifdef SYSVINCLUDE 1889 /*- 1890 *--------------------------------------------------------------------- 1891 * ParseTraditionalInclude -- 1892 * Push to another file. 1893 * 1894 * The input is the current line. The file name(s) are 1895 * following the "include". 1896 * 1897 * Results: 1898 * None 1899 * 1900 * Side Effects: 1901 * A structure is added to the includes Lst and readProc, lineno, 1902 * fname and curFILE are altered for the new file 1903 *--------------------------------------------------------------------- 1904 */ 1905 static void 1906 ParseTraditionalInclude (line) 1907 char *line; 1908 { 1909 char *fullname; /* full pathname of file */ 1910 IFile *oldFile; /* state associated with current file */ 1911 char *cp; /* current position in file spec */ 1912 char *prefEnd; 1913 int done = 0; 1914 int silent = (line[0] != 'i') ? 1 : 0; 1915 char *file = &line[silent + 7]; 1916 char *cfname = fname; 1917 size_t clineno = lineno; 1918 1919 1920 /* 1921 * Skip over whitespace 1922 */ 1923 while (isspace((unsigned char)*file)) 1924 file++; 1925 1926 if (*file == '\0') { 1927 Parse_Error (PARSE_FATAL, 1928 "Filename missing from \"include\""); 1929 return; 1930 } 1931 1932 for (; !done; file = cp + 1) { 1933 /* 1934 * Skip to end of line or next whitespace 1935 */ 1936 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 1937 continue; 1938 1939 if (*cp) 1940 *cp = '\0'; 1941 else 1942 done = 1; 1943 1944 /* 1945 * Substitute for any variables in the file name before trying to 1946 * find the thing. 1947 */ 1948 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 1949 1950 /* 1951 * Now we know the file's name, we attempt to find the durn thing. 1952 * A return of NULL indicates the file don't exist. 1953 * 1954 * Include files are first searched for relative to the including 1955 * file's location. We don't want to cd there, of course, so we 1956 * just tack on the old file's leading path components and call 1957 * Dir_FindFile to see if we can locate the beast. 1958 * XXX - this *does* search in the current directory, right? 1959 */ 1960 1961 prefEnd = strrchr(cfname, '/'); 1962 if (prefEnd != NULL) { 1963 char *newName; 1964 1965 *prefEnd = '\0'; 1966 newName = str_concat(cfname, file, STR_ADDSLASH); 1967 fullname = Dir_FindFile(newName, parseIncPath); 1968 if (fullname == NULL) { 1969 fullname = Dir_FindFile(newName, dirSearchPath); 1970 } 1971 free (newName); 1972 *prefEnd = '/'; 1973 } else { 1974 fullname = NULL; 1975 } 1976 1977 if (fullname == NULL) { 1978 /* 1979 * System makefile or makefile wasn't found in same directory as 1980 * included makefile. Search for it first on the -I search path, 1981 * then on the .PATH search path, if not found in a 1982 * -I directory. XXX: Suffix specific? 1983 */ 1984 fullname = Dir_FindFile(file, parseIncPath); 1985 if (fullname == NULL) { 1986 fullname = Dir_FindFile(file, dirSearchPath); 1987 } 1988 } 1989 1990 if (fullname == NULL) { 1991 /* 1992 * Still haven't found the makefile. Look for it on the system 1993 * path as a last resort. 1994 */ 1995 fullname = Dir_FindFile(file, sysIncPath); 1996 } 1997 1998 if (fullname == NULL) { 1999 if (!silent) 2000 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2001 "Could not find %s", file); 2002 free(file); 2003 continue; 2004 } 2005 2006 free(file); 2007 2008 /* 2009 * Once we find the absolute path to the file, we get to save all 2010 * the state from the current file before we can start reading this 2011 * include file. The state is stored in an IFile structure which 2012 * is placed on a list with other IFile structures. The list makes 2013 * a very nice stack to track how we got here... 2014 */ 2015 oldFile = (IFile *) emalloc(sizeof(IFile)); 2016 oldFile->fname = fname; 2017 2018 oldFile->F = curFILE; 2019 oldFile->p = curPTR; 2020 oldFile->lineno = lineno; 2021 2022 (void) Lst_AtFront(includes, (ClientData)oldFile); 2023 2024 /* 2025 * Once the previous state has been saved, we can get down to 2026 * reading the new file. We set up the name of the file to be the 2027 * absolute name of the include file so error messages refer to the 2028 * right place. Naturally enough, we start reading at line number 0. 2029 */ 2030 fname = fullname; 2031 lineno = 0; 2032 2033 curFILE = fopen(fullname, "r"); 2034 curPTR = NULL; 2035 if (curFILE == NULL) { 2036 if (!silent) 2037 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2038 "Cannot open %s", fullname); 2039 /* 2040 * Pop to previous file 2041 */ 2042 (void) ParseEOF(1); 2043 } 2044 } 2045 } 2046 #endif 2047 2048 /*- 2049 *--------------------------------------------------------------------- 2050 * ParseEOF -- 2051 * Called when EOF is reached in the current file. If we were reading 2052 * an include file, the includes stack is popped and things set up 2053 * to go back to reading the previous file at the previous location. 2054 * 2055 * Results: 2056 * CONTINUE if there's more to do. DONE if not. 2057 * 2058 * Side Effects: 2059 * The old curFILE, is closed. The includes list is shortened. 2060 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2061 *--------------------------------------------------------------------- 2062 */ 2063 static int 2064 ParseEOF (opened) 2065 int opened; 2066 { 2067 IFile *ifile; /* the state on the top of the includes stack */ 2068 2069 if (Lst_IsEmpty (includes)) { 2070 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2071 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2072 return (DONE); 2073 } 2074 2075 ifile = (IFile *) Lst_DeQueue (includes); 2076 free ((Address) fname); 2077 fname = ifile->fname; 2078 lineno = ifile->lineno; 2079 if (opened && curFILE) 2080 (void) fclose (curFILE); 2081 if (curPTR) { 2082 free((Address) curPTR->str); 2083 free((Address) curPTR); 2084 } 2085 curFILE = ifile->F; 2086 curPTR = ifile->p; 2087 free ((Address)ifile); 2088 2089 /* pop the PARSEDIR/PARSEFILE variables */ 2090 ParseSetParseFile(fname); 2091 return (CONTINUE); 2092 } 2093 2094 /*- 2095 *--------------------------------------------------------------------- 2096 * ParseReadc -- 2097 * Read a character from the current file 2098 * 2099 * Results: 2100 * The character that was read 2101 * 2102 * Side Effects: 2103 *--------------------------------------------------------------------- 2104 */ 2105 static __inline int 2106 ParseReadc() 2107 { 2108 if (curFILE) 2109 return fgetc(curFILE); 2110 2111 if (curPTR && *curPTR->ptr) 2112 return *curPTR->ptr++; 2113 return EOF; 2114 } 2115 2116 2117 /*- 2118 *--------------------------------------------------------------------- 2119 * ParseUnreadc -- 2120 * Put back a character to the current file 2121 * 2122 * Results: 2123 * None. 2124 * 2125 * Side Effects: 2126 *--------------------------------------------------------------------- 2127 */ 2128 static void 2129 ParseUnreadc(c) 2130 int c; 2131 { 2132 if (curFILE) { 2133 ungetc(c, curFILE); 2134 return; 2135 } 2136 if (curPTR) { 2137 *--(curPTR->ptr) = c; 2138 return; 2139 } 2140 } 2141 2142 2143 /* ParseSkipLine(): 2144 * Grab the next line 2145 */ 2146 static char * 2147 ParseSkipLine(skip) 2148 int skip; /* Skip lines that don't start with . */ 2149 { 2150 char *line; 2151 int c, lastc, lineLength = 0; 2152 Buffer buf; 2153 2154 buf = Buf_Init(MAKE_BSIZE); 2155 2156 do { 2157 Buf_Discard(buf, lineLength); 2158 lastc = '\0'; 2159 2160 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2161 && c != EOF) { 2162 if (c == '\n') { 2163 Buf_ReplaceLastByte(buf, (Byte)' '); 2164 lineno++; 2165 2166 while ((c = ParseReadc()) == ' ' || c == '\t'); 2167 2168 if (c == EOF) 2169 break; 2170 } 2171 2172 Buf_AddByte(buf, (Byte)c); 2173 lastc = c; 2174 } 2175 2176 if (c == EOF) { 2177 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2178 Buf_Destroy(buf, TRUE); 2179 return((char *)NULL); 2180 } 2181 2182 lineno++; 2183 Buf_AddByte(buf, (Byte)'\0'); 2184 line = (char *)Buf_GetAll(buf, &lineLength); 2185 } while (skip == 1 && line[0] != '.'); 2186 2187 Buf_Destroy(buf, FALSE); 2188 return line; 2189 } 2190 2191 2192 /*- 2193 *--------------------------------------------------------------------- 2194 * ParseReadLine -- 2195 * Read an entire line from the input file. Called only by Parse_File. 2196 * To facilitate escaped newlines and what have you, a character is 2197 * buffered in 'lastc', which is '\0' when no characters have been 2198 * read. When we break out of the loop, c holds the terminating 2199 * character and lastc holds a character that should be added to 2200 * the line (unless we don't read anything but a terminator). 2201 * 2202 * Results: 2203 * A line w/o its newline 2204 * 2205 * Side Effects: 2206 * Only those associated with reading a character 2207 *--------------------------------------------------------------------- 2208 */ 2209 static char * 2210 ParseReadLine () 2211 { 2212 Buffer buf; /* Buffer for current line */ 2213 register int c; /* the current character */ 2214 register int lastc; /* The most-recent character */ 2215 Boolean semiNL; /* treat semi-colons as newlines */ 2216 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2217 * for the purposes of setting semiNL */ 2218 Boolean ignComment; /* TRUE if should ignore comments (in a 2219 * shell command */ 2220 char *line; /* Result */ 2221 char *ep; /* to strip trailing blanks */ 2222 int lineLength; /* Length of result */ 2223 2224 semiNL = FALSE; 2225 ignDepOp = FALSE; 2226 ignComment = FALSE; 2227 2228 /* 2229 * Handle special-characters at the beginning of the line. Either a 2230 * leading tab (shell command) or pound-sign (possible conditional) 2231 * forces us to ignore comments and dependency operators and treat 2232 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2233 * discards completely blank lines. 2234 */ 2235 for (;;) { 2236 c = ParseReadc(); 2237 2238 if (c == '\t') { 2239 ignComment = ignDepOp = TRUE; 2240 break; 2241 } else if (c == '\n') { 2242 lineno++; 2243 } else if (c == '#') { 2244 ParseUnreadc(c); 2245 break; 2246 } else { 2247 /* 2248 * Anything else breaks out without doing anything 2249 */ 2250 break; 2251 } 2252 } 2253 2254 if (c != EOF) { 2255 lastc = c; 2256 buf = Buf_Init(MAKE_BSIZE); 2257 2258 while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) && 2259 (c != EOF)) 2260 { 2261 test_char: 2262 switch(c) { 2263 case '\n': 2264 /* 2265 * Escaped newline: read characters until a non-space or an 2266 * unescaped newline and replace them all by a single space. 2267 * This is done by storing the space over the backslash and 2268 * dropping through with the next nonspace. If it is a 2269 * semi-colon and semiNL is TRUE, it will be recognized as a 2270 * newline in the code below this... 2271 */ 2272 lineno++; 2273 lastc = ' '; 2274 while ((c = ParseReadc ()) == ' ' || c == '\t') { 2275 continue; 2276 } 2277 if (c == EOF || c == '\n') { 2278 goto line_read; 2279 } else { 2280 /* 2281 * Check for comments, semiNL's, etc. -- easier than 2282 * ParseUnreadc(c); continue; 2283 */ 2284 goto test_char; 2285 } 2286 /*NOTREACHED*/ 2287 break; 2288 2289 case ';': 2290 /* 2291 * Semi-colon: Need to see if it should be interpreted as a 2292 * newline 2293 */ 2294 if (semiNL) { 2295 /* 2296 * To make sure the command that may be following this 2297 * semi-colon begins with a tab, we push one back into the 2298 * input stream. This will overwrite the semi-colon in the 2299 * buffer. If there is no command following, this does no 2300 * harm, since the newline remains in the buffer and the 2301 * whole line is ignored. 2302 */ 2303 ParseUnreadc('\t'); 2304 goto line_read; 2305 } 2306 break; 2307 case '=': 2308 if (!semiNL) { 2309 /* 2310 * Haven't seen a dependency operator before this, so this 2311 * must be a variable assignment -- don't pay attention to 2312 * dependency operators after this. 2313 */ 2314 ignDepOp = TRUE; 2315 } else if (lastc == ':' || lastc == '!') { 2316 /* 2317 * Well, we've seen a dependency operator already, but it 2318 * was the previous character, so this is really just an 2319 * expanded variable assignment. Revert semi-colons to 2320 * being just semi-colons again and ignore any more 2321 * dependency operators. 2322 * 2323 * XXX: Note that a line like "foo : a:=b" will blow up, 2324 * but who'd write a line like that anyway? 2325 */ 2326 ignDepOp = TRUE; semiNL = FALSE; 2327 } 2328 break; 2329 case '#': 2330 if (!ignComment) { 2331 if ( 2332 #if 0 2333 compatMake && 2334 #endif 2335 (lastc != '\\')) { 2336 /* 2337 * If the character is a hash mark and it isn't escaped 2338 * (or we're being compatible), the thing is a comment. 2339 * Skip to the end of the line. 2340 */ 2341 do { 2342 c = ParseReadc(); 2343 } while ((c != '\n') && (c != EOF)); 2344 goto line_read; 2345 } else { 2346 /* 2347 * Don't add the backslash. Just let the # get copied 2348 * over. 2349 */ 2350 lastc = c; 2351 continue; 2352 } 2353 } 2354 break; 2355 case ':': 2356 case '!': 2357 if (!ignDepOp && (c == ':' || c == '!')) { 2358 /* 2359 * A semi-colon is recognized as a newline only on 2360 * dependency lines. Dependency lines are lines with a 2361 * colon or an exclamation point. Ergo... 2362 */ 2363 semiNL = TRUE; 2364 } 2365 break; 2366 } 2367 /* 2368 * Copy in the previous character and save this one in lastc. 2369 */ 2370 Buf_AddByte (buf, (Byte)lastc); 2371 lastc = c; 2372 2373 } 2374 line_read: 2375 lineno++; 2376 2377 if (lastc != '\0') { 2378 Buf_AddByte (buf, (Byte)lastc); 2379 } 2380 Buf_AddByte (buf, (Byte)'\0'); 2381 line = (char *)Buf_GetAll (buf, &lineLength); 2382 Buf_Destroy (buf, FALSE); 2383 2384 /* 2385 * Strip trailing blanks and tabs from the line. 2386 * Do not strip a blank or tab that is preceeded by 2387 * a '\' 2388 */ 2389 ep = line; 2390 while (*ep) 2391 ++ep; 2392 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2393 if (ep > line + 1 && ep[-2] == '\\') 2394 break; 2395 --ep; 2396 } 2397 *ep = 0; 2398 2399 if (line[0] == '.') { 2400 /* 2401 * The line might be a conditional. Ask the conditional module 2402 * about it and act accordingly 2403 */ 2404 switch (Cond_Eval (line)) { 2405 case COND_SKIP: 2406 /* 2407 * Skip to next conditional that evaluates to COND_PARSE. 2408 */ 2409 do { 2410 free (line); 2411 line = ParseSkipLine(1); 2412 } while (line && Cond_Eval(line) != COND_PARSE); 2413 if (line == NULL) 2414 break; 2415 /*FALLTHRU*/ 2416 case COND_PARSE: 2417 free ((Address) line); 2418 line = ParseReadLine(); 2419 break; 2420 case COND_INVALID: 2421 if (For_Eval(line)) { 2422 int ok; 2423 free(line); 2424 do { 2425 /* 2426 * Skip after the matching end 2427 */ 2428 line = ParseSkipLine(0); 2429 if (line == NULL) { 2430 Parse_Error (PARSE_FATAL, 2431 "Unexpected end of file in for loop.\n"); 2432 break; 2433 } 2434 ok = For_Eval(line); 2435 free(line); 2436 } 2437 while (ok); 2438 if (line != NULL) 2439 For_Run(); 2440 line = ParseReadLine(); 2441 } 2442 break; 2443 } 2444 } 2445 return (line); 2446 2447 } else { 2448 /* 2449 * Hit end-of-file, so return a NULL line to indicate this. 2450 */ 2451 return((char *)NULL); 2452 } 2453 } 2454 2455 /*- 2456 *----------------------------------------------------------------------- 2457 * ParseFinishLine -- 2458 * Handle the end of a dependency group. 2459 * 2460 * Results: 2461 * Nothing. 2462 * 2463 * Side Effects: 2464 * inLine set FALSE. 'targets' list destroyed. 2465 * 2466 *----------------------------------------------------------------------- 2467 */ 2468 static void 2469 ParseFinishLine() 2470 { 2471 if (inLine) { 2472 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2473 Lst_Destroy (targets, ParseHasCommands); 2474 targets = NULL; 2475 inLine = FALSE; 2476 } 2477 } 2478 2479 2480 /*- 2481 *--------------------------------------------------------------------- 2482 * Parse_File -- 2483 * Parse a file into its component parts, incorporating it into the 2484 * current dependency graph. This is the main function and controls 2485 * almost every other function in this module 2486 * 2487 * Results: 2488 * None 2489 * 2490 * Side Effects: 2491 * Loads. Nodes are added to the list of all targets, nodes and links 2492 * are added to the dependency graph. etc. etc. etc. 2493 *--------------------------------------------------------------------- 2494 */ 2495 void 2496 Parse_File(name, stream) 2497 char *name; /* the name of the file being read */ 2498 FILE * stream; /* Stream open to makefile to parse */ 2499 { 2500 register char *cp, /* pointer into the line */ 2501 *line; /* the line we're working on */ 2502 2503 inLine = FALSE; 2504 fname = name; 2505 curFILE = stream; 2506 lineno = 0; 2507 fatals = 0; 2508 2509 ParseSetParseFile(fname); 2510 2511 do { 2512 while ((line = ParseReadLine ()) != NULL) { 2513 if (*line == '.') { 2514 /* 2515 * Lines that begin with the special character are either 2516 * include or undef directives. 2517 */ 2518 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2519 continue; 2520 } 2521 if (strncmp(cp, "include", 7) == 0 || 2522 ((cp[0] == 's' || cp[0] == '-') && 2523 strncmp(&cp[1], "include", 7) == 0)) { 2524 ParseDoInclude (cp); 2525 goto nextLine; 2526 } else if (strncmp(cp, "undef", 5) == 0) { 2527 char *cp2; 2528 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2529 continue; 2530 } 2531 2532 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2533 (*cp2 != '\0'); cp2++) { 2534 continue; 2535 } 2536 2537 *cp2 = '\0'; 2538 2539 Var_Delete(cp, VAR_GLOBAL); 2540 goto nextLine; 2541 } 2542 } 2543 if (*line == '#') { 2544 /* If we're this far, the line must be a comment. */ 2545 goto nextLine; 2546 } 2547 2548 if (*line == '\t') { 2549 /* 2550 * If a line starts with a tab, it can only hope to be 2551 * a creation command. 2552 */ 2553 #ifndef POSIX 2554 shellCommand: 2555 #endif 2556 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2557 continue; 2558 } 2559 if (*cp) { 2560 if (inLine) { 2561 /* 2562 * So long as it's not a blank line and we're actually 2563 * in a dependency spec, add the command to the list of 2564 * commands of all targets in the dependency spec 2565 */ 2566 Lst_ForEach (targets, ParseAddCmd, cp); 2567 #ifdef CLEANUP 2568 Lst_AtEnd(targCmds, (ClientData) line); 2569 #endif 2570 continue; 2571 } else { 2572 Parse_Error (PARSE_FATAL, 2573 "Unassociated shell command \"%s\"", 2574 cp); 2575 } 2576 } 2577 #ifdef SYSVINCLUDE 2578 } else if (((strncmp(line, "include", 7) == 0 && 2579 isspace((unsigned char) line[7])) || 2580 ((line[0] == 's' || line[0] == '-') && 2581 strncmp(&line[1], "include", 7) == 0 && 2582 isspace((unsigned char) line[8]))) && 2583 strchr(line, ':') == NULL) { 2584 /* 2585 * It's an S3/S5-style "include". 2586 */ 2587 ParseTraditionalInclude (line); 2588 goto nextLine; 2589 #endif 2590 } else if (Parse_IsVar (line)) { 2591 ParseFinishLine(); 2592 Parse_DoVar (line, VAR_GLOBAL); 2593 } else { 2594 /* 2595 * We now know it's a dependency line so it needs to have all 2596 * variables expanded before being parsed. Tell the variable 2597 * module to complain if some variable is undefined... 2598 * To make life easier on novices, if the line is indented we 2599 * first make sure the line has a dependency operator in it. 2600 * If it doesn't have an operator and we're in a dependency 2601 * line's script, we assume it's actually a shell command 2602 * and add it to the current list of targets. 2603 */ 2604 #ifndef POSIX 2605 Boolean nonSpace = FALSE; 2606 #endif 2607 2608 cp = line; 2609 if (isspace((unsigned char) line[0])) { 2610 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2611 cp++; 2612 } 2613 if (*cp == '\0') { 2614 goto nextLine; 2615 } 2616 #ifndef POSIX 2617 while ((*cp != ':') && (*cp != '!') && (*cp != '\0')) { 2618 nonSpace = TRUE; 2619 cp++; 2620 } 2621 #endif 2622 } 2623 2624 #ifndef POSIX 2625 if (*cp == '\0') { 2626 if (inLine) { 2627 Parse_Error (PARSE_WARNING, 2628 "Shell command needs a leading tab"); 2629 goto shellCommand; 2630 } else if (nonSpace) { 2631 Parse_Error (PARSE_FATAL, "Missing operator"); 2632 } 2633 } else { 2634 #endif 2635 ParseFinishLine(); 2636 2637 cp = Var_Subst (NULL, line, VAR_CMD, TRUE); 2638 free (line); 2639 line = cp; 2640 2641 /* 2642 * Need a non-circular list for the target nodes 2643 */ 2644 if (targets) 2645 Lst_Destroy(targets, NOFREE); 2646 2647 targets = Lst_Init (FALSE); 2648 inLine = TRUE; 2649 2650 ParseDoDependency (line); 2651 #ifndef POSIX 2652 } 2653 #endif 2654 } 2655 2656 nextLine: 2657 2658 free (line); 2659 } 2660 /* 2661 * Reached EOF, but it may be just EOF of an include file... 2662 */ 2663 } while (ParseEOF(1) == CONTINUE); 2664 2665 /* 2666 * Make sure conditionals are clean 2667 */ 2668 Cond_End(); 2669 2670 if (fatals) { 2671 fprintf (stderr, "Fatal errors encountered -- cannot continue\n"); 2672 exit (1); 2673 } 2674 } 2675 2676 /*- 2677 *--------------------------------------------------------------------- 2678 * Parse_Init -- 2679 * initialize the parsing module 2680 * 2681 * Results: 2682 * none 2683 * 2684 * Side Effects: 2685 * the parseIncPath list is initialized... 2686 *--------------------------------------------------------------------- 2687 */ 2688 void 2689 Parse_Init () 2690 { 2691 mainNode = NILGNODE; 2692 parseIncPath = Lst_Init (FALSE); 2693 sysIncPath = Lst_Init (FALSE); 2694 includes = Lst_Init (FALSE); 2695 #ifdef CLEANUP 2696 targCmds = Lst_Init (FALSE); 2697 #endif 2698 } 2699 2700 void 2701 Parse_End() 2702 { 2703 #ifdef CLEANUP 2704 Lst_Destroy(targCmds, (void (*) __P((ClientData))) free); 2705 if (targets) 2706 Lst_Destroy(targets, NOFREE); 2707 Lst_Destroy(sysIncPath, Dir_Destroy); 2708 Lst_Destroy(parseIncPath, Dir_Destroy); 2709 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2710 #endif 2711 } 2712 2713 2714 /*- 2715 *----------------------------------------------------------------------- 2716 * Parse_MainName -- 2717 * Return a Lst of the main target to create for main()'s sake. If 2718 * no such target exists, we Punt with an obnoxious error message. 2719 * 2720 * Results: 2721 * A Lst of the single node to create. 2722 * 2723 * Side Effects: 2724 * None. 2725 * 2726 *----------------------------------------------------------------------- 2727 */ 2728 Lst 2729 Parse_MainName() 2730 { 2731 Lst mainList; /* result list */ 2732 2733 mainList = Lst_Init (FALSE); 2734 2735 if (mainNode == NILGNODE) { 2736 Punt ("no target to make."); 2737 /*NOTREACHED*/ 2738 } else if (mainNode->type & OP_DOUBLEDEP) { 2739 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2740 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2741 } 2742 else 2743 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2744 return (mainList); 2745 } 2746