1 /* $NetBSD: parse.c,v 1.81 2002/02/17 23:53:46 pk 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 1.81 2002/02/17 23:53:46 pk 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 1.81 2002/02/17 23:53:46 pk 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 Lst defIncPath; /* default directories for <...> includes */ 155 156 /*- 157 * specType contains the SPECial TYPE of the current target. It is 158 * Not if the target is unspecial. If it *is* special, however, the children 159 * are linked as children of the parent but not vice versa. This variable is 160 * set in ParseDoDependency 161 */ 162 typedef enum { 163 Begin, /* .BEGIN */ 164 Default, /* .DEFAULT */ 165 End, /* .END */ 166 Ignore, /* .IGNORE */ 167 Includes, /* .INCLUDES */ 168 Interrupt, /* .INTERRUPT */ 169 Libs, /* .LIBS */ 170 MFlags, /* .MFLAGS or .MAKEFLAGS */ 171 Main, /* .MAIN and we don't have anything user-specified to 172 * make */ 173 NoExport, /* .NOEXPORT */ 174 NoPath, /* .NOPATH */ 175 Not, /* Not special */ 176 NotParallel, /* .NOTPARALLEL */ 177 Null, /* .NULL */ 178 ExObjdir, /* .OBJDIR */ 179 Order, /* .ORDER */ 180 Parallel, /* .PARALLEL */ 181 ExPath, /* .PATH */ 182 Phony, /* .PHONY */ 183 #ifdef POSIX 184 Posix, /* .POSIX */ 185 #endif 186 Precious, /* .PRECIOUS */ 187 ExShell, /* .SHELL */ 188 Silent, /* .SILENT */ 189 SingleShell, /* .SINGLESHELL */ 190 Suffixes, /* .SUFFIXES */ 191 Wait, /* .WAIT */ 192 Attribute /* Generic attribute */ 193 } ParseSpecial; 194 195 static ParseSpecial specType; 196 static int waiting; 197 198 #define LPAREN '(' 199 #define RPAREN ')' 200 /* 201 * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER 202 * seen, then set to each successive source on the line. 203 */ 204 static GNode *predecessor; 205 206 /* 207 * The parseKeywords table is searched using binary search when deciding 208 * if a target or source is special. The 'spec' field is the ParseSpecial 209 * type of the keyword ("Not" if the keyword isn't special as a target) while 210 * the 'op' field is the operator to apply to the list of targets if the 211 * keyword is used as a source ("0" if the keyword isn't special as a source) 212 */ 213 static struct { 214 char *name; /* Name of keyword */ 215 ParseSpecial spec; /* Type when used as a target */ 216 int op; /* Operator when used as a source */ 217 } parseKeywords[] = { 218 { ".BEGIN", Begin, 0 }, 219 { ".DEFAULT", Default, 0 }, 220 { ".END", End, 0 }, 221 { ".EXEC", Attribute, OP_EXEC }, 222 { ".IGNORE", Ignore, OP_IGNORE }, 223 { ".INCLUDES", Includes, 0 }, 224 { ".INTERRUPT", Interrupt, 0 }, 225 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 226 { ".JOIN", Attribute, OP_JOIN }, 227 { ".LIBS", Libs, 0 }, 228 { ".MADE", Attribute, OP_MADE }, 229 { ".MAIN", Main, 0 }, 230 { ".MAKE", Attribute, OP_MAKE }, 231 { ".MAKEFLAGS", MFlags, 0 }, 232 { ".MFLAGS", MFlags, 0 }, 233 { ".NOPATH", NoPath, OP_NOPATH }, 234 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 235 { ".NOTPARALLEL", NotParallel, 0 }, 236 { ".NO_PARALLEL", NotParallel, 0 }, 237 { ".NULL", Null, 0 }, 238 { ".OBJDIR", ExObjdir, 0 }, 239 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 240 { ".ORDER", Order, 0 }, 241 { ".PARALLEL", Parallel, 0 }, 242 { ".PATH", ExPath, 0 }, 243 { ".PHONY", Phony, OP_PHONY }, 244 #ifdef POSIX 245 { ".POSIX", Posix, 0 }, 246 #endif 247 { ".PRECIOUS", Precious, OP_PRECIOUS }, 248 { ".RECURSIVE", Attribute, OP_MAKE }, 249 { ".SHELL", ExShell, 0 }, 250 { ".SILENT", Silent, OP_SILENT }, 251 { ".SINGLESHELL", SingleShell, 0 }, 252 { ".SUFFIXES", Suffixes, 0 }, 253 { ".USE", Attribute, OP_USE }, 254 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 255 { ".WAIT", Wait, 0 }, 256 }; 257 258 static int ParseIsEscaped __P((const char *, const char *)); 259 static void ParseErrorInternal __P((char *, size_t, int, char *, ...)) 260 __attribute__((__format__(__printf__, 4, 5))); 261 static void ParseVErrorInternal __P((char *, size_t, int, char *, va_list)) 262 __attribute__((__format__(__printf__, 4, 0))); 263 static int ParseFindKeyword __P((char *)); 264 static int ParseLinkSrc __P((ClientData, ClientData)); 265 static int ParseDoOp __P((ClientData, ClientData)); 266 static int ParseAddDep __P((ClientData, ClientData)); 267 static void ParseDoSrc __P((int, char *, Lst)); 268 static int ParseFindMain __P((ClientData, ClientData)); 269 static int ParseAddDir __P((ClientData, ClientData)); 270 static int ParseClearPath __P((ClientData, ClientData)); 271 static void ParseDoDependency __P((char *)); 272 static int ParseAddCmd __P((ClientData, ClientData)); 273 static __inline int ParseReadc __P((void)); 274 static void ParseUnreadc __P((int)); 275 static void ParseHasCommands __P((ClientData)); 276 static void ParseDoInclude __P((char *)); 277 static void ParseSetParseFile __P((char *)); 278 #ifdef SYSVINCLUDE 279 static void ParseTraditionalInclude __P((char *)); 280 #endif 281 static int ParseEOF __P((int)); 282 static char *ParseReadLine __P((void)); 283 static char *ParseSkipLine __P((int)); 284 static void ParseFinishLine __P((void)); 285 static void ParseMark __P((GNode *)); 286 287 extern int maxJobs; 288 289 290 /*- 291 *---------------------------------------------------------------------- 292 * ParseIsEscaped -- 293 * Check if the current character is escaped on the current line 294 * 295 * Results: 296 * 0 if the character is not backslash escaped, 1 otherwise 297 * 298 * Side Effects: 299 * None 300 *---------------------------------------------------------------------- 301 */ 302 static int 303 ParseIsEscaped(line, c) 304 const char *line, *c; 305 { 306 int active = 0; 307 for (;;) { 308 if (line == c) 309 return active; 310 if (*--c != '\\') 311 return active; 312 active = !active; 313 } 314 } 315 316 /*- 317 *---------------------------------------------------------------------- 318 * ParseFindKeyword -- 319 * Look in the table of keywords for one matching the given string. 320 * 321 * Results: 322 * The index of the keyword, or -1 if it isn't there. 323 * 324 * Side Effects: 325 * None 326 *---------------------------------------------------------------------- 327 */ 328 static int 329 ParseFindKeyword (str) 330 char *str; /* String to find */ 331 { 332 register int start, 333 end, 334 cur; 335 register int diff; 336 337 start = 0; 338 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 339 340 do { 341 cur = start + ((end - start) / 2); 342 diff = strcmp (str, parseKeywords[cur].name); 343 344 if (diff == 0) { 345 return (cur); 346 } else if (diff < 0) { 347 end = cur - 1; 348 } else { 349 start = cur + 1; 350 } 351 } while (start <= end); 352 return (-1); 353 } 354 355 /*- 356 * ParseVErrorInternal -- 357 * Error message abort function for parsing. Prints out the context 358 * of the error (line number and file) as well as the message with 359 * two optional arguments. 360 * 361 * Results: 362 * None 363 * 364 * Side Effects: 365 * "fatals" is incremented if the level is PARSE_FATAL. 366 */ 367 /* VARARGS */ 368 static void 369 #ifdef __STDC__ 370 ParseVErrorInternal(char *cfname, size_t clineno, int type, char *fmt, 371 va_list ap) 372 #else 373 ParseVErrorInternal(va_alist) 374 va_dcl 375 #endif 376 { 377 static Boolean fatal_warning_error_printed = FALSE; 378 379 (void)fprintf(stderr, "%s: \"", progname); 380 381 if (*cfname != '/') { 382 char *cp, *dir; 383 384 /* 385 * Nothing is more anoying than not knowing which Makefile 386 * is the culprit. 387 */ 388 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 389 if (dir == NULL || *dir == '\0' || 390 (*dir == '.' && dir[1] == '\0')) 391 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 392 if (dir == NULL) 393 dir = "."; 394 395 (void)fprintf(stderr, "%s/%s", dir, cfname); 396 } else 397 (void)fprintf(stderr, "%s", cfname); 398 399 (void)fprintf(stderr, "\" line %d: ", (int)clineno); 400 if (type == PARSE_WARNING) 401 (void)fprintf(stderr, "warning: "); 402 (void)vfprintf(stderr, fmt, ap); 403 (void)fprintf(stderr, "\n"); 404 (void)fflush(stderr); 405 if (type == PARSE_FATAL || parseWarnFatal) 406 fatals += 1; 407 if (parseWarnFatal && !fatal_warning_error_printed) { 408 Error("parsing warnings being treated as errors"); 409 fatal_warning_error_printed = TRUE; 410 } 411 } 412 413 /*- 414 * ParseErrorInternal -- 415 * Error function 416 * 417 * Results: 418 * None 419 * 420 * Side Effects: 421 * None 422 */ 423 /* VARARGS */ 424 static void 425 #ifdef __STDC__ 426 ParseErrorInternal(char *cfname, size_t clineno, int type, char *fmt, ...) 427 #else 428 ParseErrorInternal(va_alist) 429 va_dcl 430 #endif 431 { 432 va_list ap; 433 #ifdef __STDC__ 434 va_start(ap, fmt); 435 #else 436 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 437 char *fmt; 438 char *cfname; 439 size_t clineno; 440 441 va_start(ap); 442 cfname = va_arg(ap, char *); 443 clineno = va_arg(ap, size_t); 444 type = va_arg(ap, int); 445 fmt = va_arg(ap, char *); 446 #endif 447 448 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 449 va_end(ap); 450 } 451 452 /*- 453 * Parse_Error -- 454 * External interface to ParseErrorInternal; uses the default filename 455 * Line number. 456 * 457 * Results: 458 * None 459 * 460 * Side Effects: 461 * None 462 */ 463 /* VARARGS */ 464 void 465 #ifdef __STDC__ 466 Parse_Error(int type, char *fmt, ...) 467 #else 468 Parse_Error(va_alist) 469 va_dcl 470 #endif 471 { 472 va_list ap; 473 #ifdef __STDC__ 474 va_start(ap, fmt); 475 #else 476 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 477 char *fmt; 478 479 va_start(ap); 480 type = va_arg(ap, int); 481 fmt = va_arg(ap, char *); 482 #endif 483 ParseVErrorInternal(fname, lineno, type, fmt, ap); 484 va_end(ap); 485 } 486 487 /*- 488 *--------------------------------------------------------------------- 489 * ParseLinkSrc -- 490 * Link the parent node to its new child. Used in a Lst_ForEach by 491 * ParseDoDependency. If the specType isn't 'Not', the parent 492 * isn't linked as a parent of the child. 493 * 494 * Results: 495 * Always = 0 496 * 497 * Side Effects: 498 * New elements are added to the parents list of cgn and the 499 * children list of cgn. the unmade field of pgn is updated 500 * to reflect the additional child. 501 *--------------------------------------------------------------------- 502 */ 503 static int 504 ParseLinkSrc (pgnp, cgnp) 505 ClientData pgnp; /* The parent node */ 506 ClientData cgnp; /* The child node */ 507 { 508 GNode *pgn = (GNode *) pgnp; 509 GNode *cgn = (GNode *) cgnp; 510 511 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 512 pgn = (GNode *) Lst_Datum (Lst_Last (pgn->cohorts)); 513 (void)Lst_AtEnd (pgn->children, (ClientData)cgn); 514 if (specType == Not) 515 (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); 516 pgn->unmade += 1; 517 return (0); 518 } 519 520 /*- 521 *--------------------------------------------------------------------- 522 * ParseDoOp -- 523 * Apply the parsed operator to the given target node. Used in a 524 * Lst_ForEach call by ParseDoDependency once all targets have 525 * been found and their operator parsed. If the previous and new 526 * operators are incompatible, a major error is taken. 527 * 528 * Results: 529 * Always 0 530 * 531 * Side Effects: 532 * The type field of the node is altered to reflect any new bits in 533 * the op. 534 *--------------------------------------------------------------------- 535 */ 536 static int 537 ParseDoOp (gnp, opp) 538 ClientData gnp; /* The node to which the operator is to be 539 * applied */ 540 ClientData opp; /* The operator to apply */ 541 { 542 GNode *gn = (GNode *) gnp; 543 int op = *(int *) opp; 544 /* 545 * If the dependency mask of the operator and the node don't match and 546 * the node has actually had an operator applied to it before, and 547 * the operator actually has some dependency information in it, complain. 548 */ 549 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 550 !OP_NOP(gn->type) && !OP_NOP(op)) 551 { 552 Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name); 553 return (1); 554 } 555 556 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 557 /* 558 * If the node was the object of a :: operator, we need to create a 559 * new instance of it for the children and commands on this dependency 560 * line. The new instance is placed on the 'cohorts' list of the 561 * initial one (note the initial one is not on its own cohorts list) 562 * and the new instance is linked to all parents of the initial 563 * instance. 564 */ 565 register GNode *cohort; 566 567 /* 568 * Propagate copied bits to the initial node. They'll be propagated 569 * back to the rest of the cohorts later. 570 */ 571 gn->type |= op & ~OP_OPMASK; 572 573 cohort = Targ_NewGN(gn->name); 574 /* 575 * Make the cohort invisible as well to avoid duplicating it into 576 * other variables. True, parents of this target won't tend to do 577 * anything with their local variables, but better safe than 578 * sorry. (I think this is pointless now, since the relevant list 579 * traversals will no longer see this node anyway. -mycroft) 580 */ 581 cohort->type = op | OP_INVISIBLE; 582 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 583 } else { 584 /* 585 * We don't want to nuke any previous flags (whatever they were) so we 586 * just OR the new operator into the old 587 */ 588 gn->type |= op; 589 } 590 591 return (0); 592 } 593 594 /*- 595 *--------------------------------------------------------------------- 596 * ParseAddDep -- 597 * Check if the pair of GNodes given needs to be synchronized. 598 * This has to be when two nodes are on different sides of a 599 * .WAIT directive. 600 * 601 * Results: 602 * Returns 1 if the two targets need to be ordered, 0 otherwise. 603 * If it returns 1, the search can stop 604 * 605 * Side Effects: 606 * A dependency can be added between the two nodes. 607 * 608 *--------------------------------------------------------------------- 609 */ 610 static int 611 ParseAddDep(pp, sp) 612 ClientData pp; 613 ClientData sp; 614 { 615 GNode *p = (GNode *) pp; 616 GNode *s = (GNode *) sp; 617 618 if (p->order < s->order) { 619 /* 620 * XXX: This can cause loops, and loops can cause unmade targets, 621 * but checking is tedious, and the debugging output can show the 622 * problem 623 */ 624 (void)Lst_AtEnd(p->successors, (ClientData)s); 625 (void)Lst_AtEnd(s->preds, (ClientData)p); 626 return 0; 627 } 628 else 629 return 1; 630 } 631 632 633 /*- 634 *--------------------------------------------------------------------- 635 * ParseDoSrc -- 636 * Given the name of a source, figure out if it is an attribute 637 * and apply it to the targets if it is. Else decide if there is 638 * some attribute which should be applied *to* the source because 639 * of some special target and apply it if so. Otherwise, make the 640 * source be a child of the targets in the list 'targets' 641 * 642 * Results: 643 * None 644 * 645 * Side Effects: 646 * Operator bits may be added to the list of targets or to the source. 647 * The targets may have a new source added to their lists of children. 648 *--------------------------------------------------------------------- 649 */ 650 static void 651 ParseDoSrc (tOp, src, allsrc) 652 int tOp; /* operator (if any) from special targets */ 653 char *src; /* name of the source to handle */ 654 Lst allsrc; /* List of all sources to wait for */ 655 656 { 657 GNode *gn = NULL; 658 659 if (*src == '.' && isupper ((unsigned char)src[1])) { 660 int keywd = ParseFindKeyword(src); 661 if (keywd != -1) { 662 int op = parseKeywords[keywd].op; 663 if (op != 0) { 664 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 665 return; 666 } 667 if (parseKeywords[keywd].spec == Wait) { 668 waiting++; 669 return; 670 } 671 } 672 } 673 674 switch (specType) { 675 case Main: 676 /* 677 * If we have noted the existence of a .MAIN, it means we need 678 * to add the sources of said target to the list of things 679 * to create. The string 'src' is likely to be free, so we 680 * must make a new copy of it. Note that this will only be 681 * invoked if the user didn't specify a target on the command 682 * line. This is to allow #ifmake's to succeed, or something... 683 */ 684 (void) Lst_AtEnd (create, (ClientData)estrdup(src)); 685 /* 686 * Add the name to the .TARGETS variable as well, so the user cna 687 * employ that, if desired. 688 */ 689 Var_Append(".TARGETS", src, VAR_GLOBAL); 690 return; 691 692 case Order: 693 /* 694 * Create proper predecessor/successor links between the previous 695 * source and the current one. 696 */ 697 gn = Targ_FindNode(src, TARG_CREATE); 698 if (predecessor != NILGNODE) { 699 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 700 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 701 } 702 /* 703 * The current source now becomes the predecessor for the next one. 704 */ 705 predecessor = gn; 706 break; 707 708 default: 709 /* 710 * If the source is not an attribute, we need to find/create 711 * a node for it. After that we can apply any operator to it 712 * from a special target or link it to its parents, as 713 * appropriate. 714 * 715 * In the case of a source that was the object of a :: operator, 716 * the attribute is applied to all of its instances (as kept in 717 * the 'cohorts' list of the node) or all the cohorts are linked 718 * to all the targets. 719 */ 720 gn = Targ_FindNode (src, TARG_CREATE); 721 if (tOp) { 722 gn->type |= tOp; 723 } else { 724 Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); 725 } 726 break; 727 } 728 729 gn->order = waiting; 730 (void)Lst_AtEnd(allsrc, (ClientData)gn); 731 if (waiting) { 732 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 733 } 734 } 735 736 /*- 737 *----------------------------------------------------------------------- 738 * ParseFindMain -- 739 * Find a real target in the list and set it to be the main one. 740 * Called by ParseDoDependency when a main target hasn't been found 741 * yet. 742 * 743 * Results: 744 * 0 if main not found yet, 1 if it is. 745 * 746 * Side Effects: 747 * mainNode is changed and Targ_SetMain is called. 748 * 749 *----------------------------------------------------------------------- 750 */ 751 static int 752 ParseFindMain(gnp, dummy) 753 ClientData gnp; /* Node to examine */ 754 ClientData dummy; 755 { 756 GNode *gn = (GNode *) gnp; 757 if ((gn->type & OP_NOTARGET) == 0) { 758 mainNode = gn; 759 Targ_SetMain(gn); 760 return (dummy ? 1 : 1); 761 } else { 762 return (dummy ? 0 : 0); 763 } 764 } 765 766 /*- 767 *----------------------------------------------------------------------- 768 * ParseAddDir -- 769 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 770 * 771 * Results: 772 * === 0 773 * 774 * Side Effects: 775 * See Dir_AddDir. 776 * 777 *----------------------------------------------------------------------- 778 */ 779 static int 780 ParseAddDir(path, name) 781 ClientData path; 782 ClientData name; 783 { 784 (void) Dir_AddDir((Lst) path, (char *) name); 785 return(0); 786 } 787 788 /*- 789 *----------------------------------------------------------------------- 790 * ParseClearPath -- 791 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 792 * 793 * Results: 794 * === 0 795 * 796 * Side Effects: 797 * See Dir_ClearPath 798 * 799 *----------------------------------------------------------------------- 800 */ 801 static int 802 ParseClearPath(path, dummy) 803 ClientData path; 804 ClientData dummy; 805 { 806 Dir_ClearPath((Lst) path); 807 return(dummy ? 0 : 0); 808 } 809 810 /*- 811 *--------------------------------------------------------------------- 812 * ParseDoDependency -- 813 * Parse the dependency line in line. 814 * 815 * Results: 816 * None 817 * 818 * Side Effects: 819 * The nodes of the sources are linked as children to the nodes of the 820 * targets. Some nodes may be created. 821 * 822 * We parse a dependency line by first extracting words from the line and 823 * finding nodes in the list of all targets with that name. This is done 824 * until a character is encountered which is an operator character. Currently 825 * these are only ! and :. At this point the operator is parsed and the 826 * pointer into the line advanced until the first source is encountered. 827 * The parsed operator is applied to each node in the 'targets' list, 828 * which is where the nodes found for the targets are kept, by means of 829 * the ParseDoOp function. 830 * The sources are read in much the same way as the targets were except 831 * that now they are expanded using the wildcarding scheme of the C-Shell 832 * and all instances of the resulting words in the list of all targets 833 * are found. Each of the resulting nodes is then linked to each of the 834 * targets as one of its children. 835 * Certain targets are handled specially. These are the ones detailed 836 * by the specType variable. 837 * The storing of transformation rules is also taken care of here. 838 * A target is recognized as a transformation rule by calling 839 * Suff_IsTransform. If it is a transformation rule, its node is gotten 840 * from the suffix module via Suff_AddTransform rather than the standard 841 * Targ_FindNode in the target module. 842 *--------------------------------------------------------------------- 843 */ 844 static void 845 ParseDoDependency (line) 846 char *line; /* the line to parse */ 847 { 848 char *cp; /* our current position */ 849 GNode *gn; /* a general purpose temporary node */ 850 int op; /* the operator on the line */ 851 char savec; /* a place to save a character */ 852 Lst paths; /* List of search paths to alter when parsing 853 * a list of .PATH targets */ 854 int tOp; /* operator from special target */ 855 Lst sources; /* list of archive source names after 856 * expansion */ 857 Lst curTargs; /* list of target names to be found and added 858 * to the targets list */ 859 Lst curSrcs; /* list of sources in order */ 860 char *lstart = line; 861 862 tOp = 0; 863 864 specType = Not; 865 waiting = 0; 866 paths = (Lst)NULL; 867 868 curTargs = Lst_Init(FALSE); 869 curSrcs = Lst_Init(FALSE); 870 871 do { 872 for (cp = line; 873 *cp && (ParseIsEscaped(lstart, cp) || 874 (!isspace ((unsigned char)*cp) && 875 (*cp != '!') && (*cp != ':') && (*cp != LPAREN))); 876 cp++) 877 { 878 if (*cp == '$') { 879 /* 880 * Must be a dynamic source (would have been expanded 881 * otherwise), so call the Var module to parse the puppy 882 * so we can safely advance beyond it...There should be 883 * no errors in this, as they would have been discovered 884 * in the initial Var_Subst and we wouldn't be here. 885 */ 886 int length; 887 Boolean freeIt; 888 char *result; 889 890 result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 891 892 if (freeIt) { 893 free(result); 894 } 895 cp += length-1; 896 } 897 continue; 898 } 899 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 900 /* 901 * Archives must be handled specially to make sure the OP_ARCHV 902 * flag is set in their 'type' field, for one thing, and because 903 * things like "archive(file1.o file2.o file3.o)" are permissible. 904 * Arch_ParseArchive will set 'line' to be the first non-blank 905 * after the archive-spec. It creates/finds nodes for the members 906 * and places them on the given list, returning SUCCESS if all 907 * went well and FAILURE if there was an error in the 908 * specification. On error, line should remain untouched. 909 */ 910 if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { 911 Parse_Error (PARSE_FATAL, 912 "Error in archive specification: \"%s\"", line); 913 return; 914 } else { 915 continue; 916 } 917 } 918 savec = *cp; 919 920 if (!*cp) { 921 /* 922 * Ending a dependency line without an operator is a Bozo 923 * no-no. As a heuristic, this is also often triggered by 924 * undetected conflicts from cvs/rcs merges. 925 */ 926 if ((strncmp(line, "<<<<<<", 6) == 0) || 927 (strncmp(line, "======", 6) == 0) || 928 (strncmp(line, ">>>>>>", 6) == 0)) 929 Parse_Error (PARSE_FATAL, 930 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 931 else 932 Parse_Error (PARSE_FATAL, "Need an operator"); 933 return; 934 } 935 *cp = '\0'; 936 /* 937 * Have a word in line. See if it's a special target and set 938 * specType to match it. 939 */ 940 if (*line == '.' && isupper ((unsigned char)line[1])) { 941 /* 942 * See if the target is a special target that must have it 943 * or its sources handled specially. 944 */ 945 int keywd = ParseFindKeyword(line); 946 if (keywd != -1) { 947 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 948 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 949 return; 950 } 951 952 specType = parseKeywords[keywd].spec; 953 tOp = parseKeywords[keywd].op; 954 955 /* 956 * Certain special targets have special semantics: 957 * .PATH Have to set the dirSearchPath 958 * variable too 959 * .MAIN Its sources are only used if 960 * nothing has been specified to 961 * create. 962 * .DEFAULT Need to create a node to hang 963 * commands on, but we don't want 964 * it in the graph, nor do we want 965 * it to be the Main Target, so we 966 * create it, set OP_NOTMAIN and 967 * add it to the list, setting 968 * DEFAULT to the new node for 969 * later use. We claim the node is 970 * A transformation rule to make 971 * life easier later, when we'll 972 * use Make_HandleUse to actually 973 * apply the .DEFAULT commands. 974 * .PHONY The list of targets 975 * .NOPATH Don't search for file in the path 976 * .BEGIN 977 * .END 978 * .INTERRUPT Are not to be considered the 979 * main target. 980 * .NOTPARALLEL Make only one target at a time. 981 * .SINGLESHELL Create a shell for each command. 982 * .ORDER Must set initial predecessor to NIL 983 */ 984 switch (specType) { 985 case ExPath: 986 if (paths == NULL) { 987 paths = Lst_Init(FALSE); 988 } 989 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 990 break; 991 case Main: 992 if (!Lst_IsEmpty(create)) { 993 specType = Not; 994 } 995 break; 996 case Begin: 997 case End: 998 case Interrupt: 999 gn = Targ_FindNode(line, TARG_CREATE); 1000 gn->type |= OP_NOTMAIN; 1001 (void)Lst_AtEnd(targets, (ClientData)gn); 1002 break; 1003 case Default: 1004 gn = Targ_NewGN(".DEFAULT"); 1005 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1006 (void)Lst_AtEnd(targets, (ClientData)gn); 1007 DEFAULT = gn; 1008 break; 1009 case NotParallel: 1010 { 1011 maxJobs = 1; 1012 break; 1013 } 1014 case SingleShell: 1015 compatMake = TRUE; 1016 break; 1017 case Order: 1018 predecessor = NILGNODE; 1019 break; 1020 default: 1021 break; 1022 } 1023 } else if (strncmp (line, ".PATH", 5) == 0) { 1024 /* 1025 * .PATH<suffix> has to be handled specially. 1026 * Call on the suffix module to give us a path to 1027 * modify. 1028 */ 1029 Lst path; 1030 1031 specType = ExPath; 1032 path = Suff_GetPath (&line[5]); 1033 if (path == NILLST) { 1034 Parse_Error (PARSE_FATAL, 1035 "Suffix '%s' not defined (yet)", 1036 &line[5]); 1037 return; 1038 } else { 1039 if (paths == (Lst)NULL) { 1040 paths = Lst_Init(FALSE); 1041 } 1042 (void)Lst_AtEnd(paths, (ClientData)path); 1043 } 1044 } 1045 } 1046 1047 /* 1048 * Have word in line. Get or create its node and stick it at 1049 * the end of the targets list 1050 */ 1051 if ((specType == Not) && (*line != '\0')) { 1052 if (Dir_HasWildcards(line)) { 1053 /* 1054 * Targets are to be sought only in the current directory, 1055 * so create an empty path for the thing. Note we need to 1056 * use Dir_Destroy in the destruction of the path as the 1057 * Dir module could have added a directory to the path... 1058 */ 1059 Lst emptyPath = Lst_Init(FALSE); 1060 1061 Dir_Expand(line, emptyPath, curTargs); 1062 1063 Lst_Destroy(emptyPath, Dir_Destroy); 1064 } else { 1065 /* 1066 * No wildcards, but we want to avoid code duplication, 1067 * so create a list with the word on it. 1068 */ 1069 (void)Lst_AtEnd(curTargs, (ClientData)line); 1070 } 1071 1072 while(!Lst_IsEmpty(curTargs)) { 1073 char *targName = (char *)Lst_DeQueue(curTargs); 1074 1075 if (!Suff_IsTransform (targName)) { 1076 gn = Targ_FindNode (targName, TARG_CREATE); 1077 } else { 1078 gn = Suff_AddTransform (targName); 1079 } 1080 1081 (void)Lst_AtEnd (targets, (ClientData)gn); 1082 } 1083 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1084 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1085 } 1086 1087 *cp = savec; 1088 /* 1089 * If it is a special type and not .PATH, it's the only target we 1090 * allow on this line... 1091 */ 1092 if (specType != Not && specType != ExPath) { 1093 Boolean warn = FALSE; 1094 1095 while (*cp && (ParseIsEscaped(lstart, cp) || 1096 ((*cp != '!') && (*cp != ':')))) { 1097 if (ParseIsEscaped(lstart, cp) || 1098 (*cp != ' ' && *cp != '\t')) { 1099 warn = TRUE; 1100 } 1101 cp++; 1102 } 1103 if (warn) { 1104 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1105 } 1106 } else { 1107 while (*cp && isspace ((unsigned char)*cp)) { 1108 cp++; 1109 } 1110 } 1111 line = cp; 1112 } while (*line && (ParseIsEscaped(lstart, line) || 1113 ((*line != '!') && (*line != ':')))); 1114 1115 /* 1116 * Don't need the list of target names anymore... 1117 */ 1118 Lst_Destroy(curTargs, NOFREE); 1119 1120 if (!Lst_IsEmpty(targets)) { 1121 switch(specType) { 1122 default: 1123 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1124 break; 1125 case Default: 1126 case Begin: 1127 case End: 1128 case Interrupt: 1129 /* 1130 * These four create nodes on which to hang commands, so 1131 * targets shouldn't be empty... 1132 */ 1133 case Not: 1134 /* 1135 * Nothing special here -- targets can be empty if it wants. 1136 */ 1137 break; 1138 } 1139 } 1140 1141 /* 1142 * Have now parsed all the target names. Must parse the operator next. The 1143 * result is left in op . 1144 */ 1145 if (*cp == '!') { 1146 op = OP_FORCE; 1147 } else if (*cp == ':') { 1148 if (cp[1] == ':') { 1149 op = OP_DOUBLEDEP; 1150 cp++; 1151 } else { 1152 op = OP_DEPENDS; 1153 } 1154 } else { 1155 Parse_Error (PARSE_FATAL, "Missing dependency operator"); 1156 return; 1157 } 1158 1159 cp++; /* Advance beyond operator */ 1160 1161 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 1162 1163 /* 1164 * Get to the first source 1165 */ 1166 while (*cp && isspace ((unsigned char)*cp)) { 1167 cp++; 1168 } 1169 line = cp; 1170 1171 /* 1172 * Several special targets take different actions if present with no 1173 * sources: 1174 * a .SUFFIXES line with no sources clears out all old suffixes 1175 * a .PRECIOUS line makes all targets precious 1176 * a .IGNORE line ignores errors for all targets 1177 * a .SILENT line creates silence when making all targets 1178 * a .PATH removes all directories from the search path(s). 1179 */ 1180 if (!*line) { 1181 switch (specType) { 1182 case Suffixes: 1183 Suff_ClearSuffixes (); 1184 break; 1185 case Precious: 1186 allPrecious = TRUE; 1187 break; 1188 case Ignore: 1189 ignoreErrors = TRUE; 1190 break; 1191 case Silent: 1192 beSilent = TRUE; 1193 break; 1194 case ExPath: 1195 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1196 break; 1197 #ifdef POSIX 1198 case Posix: 1199 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1200 break; 1201 #endif 1202 default: 1203 break; 1204 } 1205 } else if (specType == MFlags) { 1206 /* 1207 * Call on functions in main.c to deal with these arguments and 1208 * set the initial character to a null-character so the loop to 1209 * get sources won't get anything 1210 */ 1211 Main_ParseArgLine (line); 1212 *line = '\0'; 1213 } else if (specType == ExShell) { 1214 if (Job_ParseShell (line) != SUCCESS) { 1215 Parse_Error (PARSE_FATAL, "improper shell specification"); 1216 return; 1217 } 1218 *line = '\0'; 1219 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1220 *line = '\0'; 1221 } 1222 1223 /* 1224 * NOW GO FOR THE SOURCES 1225 */ 1226 if ((specType == Suffixes) || (specType == ExPath) || 1227 (specType == Includes) || (specType == Libs) || 1228 (specType == Null) || (specType == ExObjdir)) 1229 { 1230 while (*line) { 1231 /* 1232 * If the target was one that doesn't take files as its sources 1233 * but takes something like suffixes, we take each 1234 * space-separated word on the line as a something and deal 1235 * with it accordingly. 1236 * 1237 * If the target was .SUFFIXES, we take each source as a 1238 * suffix and add it to the list of suffixes maintained by the 1239 * Suff module. 1240 * 1241 * If the target was a .PATH, we add the source as a directory 1242 * to search on the search path. 1243 * 1244 * If it was .INCLUDES, the source is taken to be the suffix of 1245 * files which will be #included and whose search path should 1246 * be present in the .INCLUDES variable. 1247 * 1248 * If it was .LIBS, the source is taken to be the suffix of 1249 * files which are considered libraries and whose search path 1250 * should be present in the .LIBS variable. 1251 * 1252 * If it was .NULL, the source is the suffix to use when a file 1253 * has no valid suffix. 1254 * 1255 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1256 * and will cause make to do a new chdir to that path. 1257 */ 1258 while (*cp && !isspace ((unsigned char)*cp)) { 1259 cp++; 1260 } 1261 savec = *cp; 1262 *cp = '\0'; 1263 switch (specType) { 1264 case Suffixes: 1265 Suff_AddSuffix (line, &mainNode); 1266 break; 1267 case ExPath: 1268 Lst_ForEach(paths, ParseAddDir, (ClientData)line); 1269 break; 1270 case Includes: 1271 Suff_AddInclude (line); 1272 break; 1273 case Libs: 1274 Suff_AddLib (line); 1275 break; 1276 case Null: 1277 Suff_SetNull (line); 1278 break; 1279 case ExObjdir: 1280 Main_SetObjdir(line); 1281 break; 1282 default: 1283 break; 1284 } 1285 *cp = savec; 1286 if (savec != '\0') { 1287 cp++; 1288 } 1289 while (*cp && isspace ((unsigned char)*cp)) { 1290 cp++; 1291 } 1292 line = cp; 1293 } 1294 if (paths) { 1295 Lst_Destroy(paths, NOFREE); 1296 } 1297 } else { 1298 while (*line) { 1299 /* 1300 * The targets take real sources, so we must beware of archive 1301 * specifications (i.e. things with left parentheses in them) 1302 * and handle them accordingly. 1303 */ 1304 while (*cp && !isspace ((unsigned char)*cp)) { 1305 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1306 /* 1307 * Only stop for a left parenthesis if it isn't at the 1308 * start of a word (that'll be for variable changes 1309 * later) and isn't preceded by a dollar sign (a dynamic 1310 * source). 1311 */ 1312 break; 1313 } else { 1314 cp++; 1315 } 1316 } 1317 1318 if (*cp == LPAREN) { 1319 sources = Lst_Init (FALSE); 1320 if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) { 1321 Parse_Error (PARSE_FATAL, 1322 "Error in source archive spec \"%s\"", line); 1323 return; 1324 } 1325 1326 while (!Lst_IsEmpty (sources)) { 1327 gn = (GNode *) Lst_DeQueue (sources); 1328 ParseDoSrc (tOp, gn->name, curSrcs); 1329 } 1330 Lst_Destroy (sources, NOFREE); 1331 cp = line; 1332 } else { 1333 if (*cp) { 1334 *cp = '\0'; 1335 cp += 1; 1336 } 1337 1338 ParseDoSrc (tOp, line, curSrcs); 1339 } 1340 while (*cp && isspace ((unsigned char)*cp)) { 1341 cp++; 1342 } 1343 line = cp; 1344 } 1345 } 1346 1347 if (mainNode == NILGNODE) { 1348 /* 1349 * If we have yet to decide on a main target to make, in the 1350 * absence of any user input, we want the first target on 1351 * the first dependency line that is actually a real target 1352 * (i.e. isn't a .USE or .EXEC rule) to be made. 1353 */ 1354 Lst_ForEach (targets, ParseFindMain, (ClientData)0); 1355 } 1356 1357 /* 1358 * Finally, destroy the list of sources 1359 */ 1360 Lst_Destroy(curSrcs, NOFREE); 1361 } 1362 1363 /*- 1364 *--------------------------------------------------------------------- 1365 * Parse_IsVar -- 1366 * Return TRUE if the passed line is a variable assignment. A variable 1367 * assignment consists of a single word followed by optional whitespace 1368 * followed by either a += or an = operator. 1369 * This function is used both by the Parse_File function and main when 1370 * parsing the command-line arguments. 1371 * 1372 * Results: 1373 * TRUE if it is. FALSE if it ain't 1374 * 1375 * Side Effects: 1376 * none 1377 *--------------------------------------------------------------------- 1378 */ 1379 Boolean 1380 Parse_IsVar (line) 1381 register char *line; /* the line to check */ 1382 { 1383 register Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1384 register Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1385 int level = 0; 1386 #define ISEQOPERATOR(c) \ 1387 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1388 1389 /* 1390 * Skip to variable name 1391 */ 1392 for (;(*line == ' ') || (*line == '\t'); line++) 1393 continue; 1394 1395 for (; *line != '=' || level != 0; line++) 1396 switch (*line) { 1397 case '\0': 1398 /* 1399 * end-of-line -- can't be a variable assignment. 1400 */ 1401 return FALSE; 1402 1403 case ' ': 1404 case '\t': 1405 /* 1406 * there can be as much white space as desired so long as there is 1407 * only one word before the operator 1408 */ 1409 wasSpace = TRUE; 1410 break; 1411 1412 case LPAREN: 1413 case '{': 1414 level++; 1415 break; 1416 1417 case '}': 1418 case RPAREN: 1419 level--; 1420 break; 1421 1422 default: 1423 if (wasSpace && haveName) { 1424 if (ISEQOPERATOR(*line)) { 1425 /* 1426 * We must have a finished word 1427 */ 1428 if (level != 0) 1429 return FALSE; 1430 1431 /* 1432 * When an = operator [+?!:] is found, the next 1433 * character must be an = or it ain't a valid 1434 * assignment. 1435 */ 1436 if (line[1] == '=') 1437 return haveName; 1438 #ifdef SUNSHCMD 1439 /* 1440 * This is a shell command 1441 */ 1442 if (strncmp(line, ":sh", 3) == 0) 1443 return haveName; 1444 #endif 1445 } 1446 /* 1447 * This is the start of another word, so not assignment. 1448 */ 1449 return FALSE; 1450 } 1451 else { 1452 haveName = TRUE; 1453 wasSpace = FALSE; 1454 } 1455 break; 1456 } 1457 1458 return haveName; 1459 } 1460 1461 /*- 1462 *--------------------------------------------------------------------- 1463 * Parse_DoVar -- 1464 * Take the variable assignment in the passed line and do it in the 1465 * global context. 1466 * 1467 * Note: There is a lexical ambiguity with assignment modifier characters 1468 * in variable names. This routine interprets the character before the = 1469 * as a modifier. Therefore, an assignment like 1470 * C++=/usr/bin/CC 1471 * is interpreted as "C+ +=" instead of "C++ =". 1472 * 1473 * Results: 1474 * none 1475 * 1476 * Side Effects: 1477 * the variable structure of the given variable name is altered in the 1478 * global context. 1479 *--------------------------------------------------------------------- 1480 */ 1481 void 1482 Parse_DoVar (line, ctxt) 1483 char *line; /* a line guaranteed to be a variable 1484 * assignment. This reduces error checks */ 1485 GNode *ctxt; /* Context in which to do the assignment */ 1486 { 1487 char *cp; /* pointer into line */ 1488 enum { 1489 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1490 } type; /* Type of assignment */ 1491 char *opc; /* ptr to operator character to 1492 * null-terminate the variable name */ 1493 /* 1494 * Avoid clobbered variable warnings by forcing the compiler 1495 * to ``unregister'' variables 1496 */ 1497 #if __GNUC__ 1498 (void) &cp; 1499 (void) &line; 1500 #endif 1501 1502 /* 1503 * Skip to variable name 1504 */ 1505 while ((*line == ' ') || (*line == '\t')) { 1506 line++; 1507 } 1508 1509 /* 1510 * Skip to operator character, nulling out whitespace as we go 1511 */ 1512 for (cp = line + 1; *cp != '='; cp++) { 1513 if (isspace ((unsigned char)*cp)) { 1514 *cp = '\0'; 1515 } 1516 } 1517 opc = cp-1; /* operator is the previous character */ 1518 *cp++ = '\0'; /* nuke the = */ 1519 1520 /* 1521 * Check operator type 1522 */ 1523 switch (*opc) { 1524 case '+': 1525 type = VAR_APPEND; 1526 *opc = '\0'; 1527 break; 1528 1529 case '?': 1530 /* 1531 * If the variable already has a value, we don't do anything. 1532 */ 1533 *opc = '\0'; 1534 if (Var_Exists(line, ctxt)) { 1535 return; 1536 } else { 1537 type = VAR_NORMAL; 1538 } 1539 break; 1540 1541 case ':': 1542 type = VAR_SUBST; 1543 *opc = '\0'; 1544 break; 1545 1546 case '!': 1547 type = VAR_SHELL; 1548 *opc = '\0'; 1549 break; 1550 1551 default: 1552 #ifdef SUNSHCMD 1553 while (opc > line && *opc != ':') 1554 opc--; 1555 1556 if (strncmp(opc, ":sh", 3) == 0) { 1557 type = VAR_SHELL; 1558 *opc = '\0'; 1559 break; 1560 } 1561 #endif 1562 type = VAR_NORMAL; 1563 break; 1564 } 1565 1566 while (isspace ((unsigned char)*cp)) { 1567 cp++; 1568 } 1569 1570 if (type == VAR_APPEND) { 1571 Var_Append (line, cp, ctxt); 1572 } else if (type == VAR_SUBST) { 1573 /* 1574 * Allow variables in the old value to be undefined, but leave their 1575 * invocation alone -- this is done by forcing oldVars to be false. 1576 * XXX: This can cause recursive variables, but that's not hard to do, 1577 * and this allows someone to do something like 1578 * 1579 * CFLAGS = $(.INCLUDES) 1580 * CFLAGS := -I.. $(CFLAGS) 1581 * 1582 * And not get an error. 1583 */ 1584 Boolean oldOldVars = oldVars; 1585 1586 oldVars = FALSE; 1587 1588 /* 1589 * make sure that we set the variable the first time to nothing 1590 * so that it gets substituted! 1591 */ 1592 if (!Var_Exists(line, ctxt)) 1593 Var_Set(line, "", ctxt, 0); 1594 1595 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1596 oldVars = oldOldVars; 1597 1598 Var_Set(line, cp, ctxt, 0); 1599 free(cp); 1600 } else if (type == VAR_SHELL) { 1601 Boolean freeCmd = FALSE; /* TRUE if the command needs to be freed, i.e. 1602 * if any variable expansion was performed */ 1603 char *res, *err; 1604 1605 if (strchr(cp, '$') != NULL) { 1606 /* 1607 * There's a dollar sign in the command, so perform variable 1608 * expansion on the whole thing. The resulting string will need 1609 * freeing when we're done, so set freeCmd to TRUE. 1610 */ 1611 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1612 freeCmd = TRUE; 1613 } 1614 1615 res = Cmd_Exec(cp, &err); 1616 Var_Set(line, res, ctxt, 0); 1617 free(res); 1618 1619 if (err) 1620 Parse_Error(PARSE_WARNING, err, cp); 1621 1622 if (freeCmd) 1623 free(cp); 1624 } else { 1625 /* 1626 * Normal assignment -- just do it. 1627 */ 1628 Var_Set(line, cp, ctxt, 0); 1629 } 1630 if (strcmp(line, MAKEOVERRIDES) == 0) 1631 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1632 } 1633 1634 1635 /*- 1636 * ParseAddCmd -- 1637 * Lst_ForEach function to add a command line to all targets 1638 * 1639 * Results: 1640 * Always 0 1641 * 1642 * Side Effects: 1643 * A new element is added to the commands list of the node. 1644 */ 1645 static int 1646 ParseAddCmd(gnp, cmd) 1647 ClientData gnp; /* the node to which the command is to be added */ 1648 ClientData cmd; /* the command to add */ 1649 { 1650 GNode *gn = (GNode *) gnp; 1651 /* if target already supplied, ignore commands */ 1652 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1653 gn = (GNode *) Lst_Datum (Lst_Last (gn->cohorts)); 1654 if (!(gn->type & OP_HAS_COMMANDS)) { 1655 (void)Lst_AtEnd(gn->commands, cmd); 1656 ParseMark(gn); 1657 } else { 1658 #ifdef notyet 1659 /* XXX: We cannot do this until we fix the tree */ 1660 (void)Lst_AtEnd(gn->commands, cmd); 1661 Parse_Error (PARSE_WARNING, 1662 "overriding commands for target \"%s\"; " 1663 "previous commands defined at %s: %d ignored", 1664 gn->name, gn->fname, gn->lineno); 1665 #else 1666 Parse_Error (PARSE_WARNING, 1667 "duplicate script for target \"%s\" ignored", 1668 gn->name); 1669 ParseErrorInternal (gn->fname, gn->lineno, PARSE_WARNING, 1670 "using previous script for \"%s\" defined here", 1671 gn->name); 1672 #endif 1673 } 1674 return(0); 1675 } 1676 1677 /*- 1678 *----------------------------------------------------------------------- 1679 * ParseHasCommands -- 1680 * Callback procedure for Parse_File when destroying the list of 1681 * targets on the last dependency line. Marks a target as already 1682 * having commands if it does, to keep from having shell commands 1683 * on multiple dependency lines. 1684 * 1685 * Results: 1686 * None 1687 * 1688 * Side Effects: 1689 * OP_HAS_COMMANDS may be set for the target. 1690 * 1691 *----------------------------------------------------------------------- 1692 */ 1693 static void 1694 ParseHasCommands(gnp) 1695 ClientData gnp; /* Node to examine */ 1696 { 1697 GNode *gn = (GNode *) gnp; 1698 if (!Lst_IsEmpty(gn->commands)) { 1699 gn->type |= OP_HAS_COMMANDS; 1700 } 1701 } 1702 1703 /*- 1704 *----------------------------------------------------------------------- 1705 * Parse_AddIncludeDir -- 1706 * Add a directory to the path searched for included makefiles 1707 * bracketed by double-quotes. Used by functions in main.c 1708 * 1709 * Results: 1710 * None. 1711 * 1712 * Side Effects: 1713 * The directory is appended to the list. 1714 * 1715 *----------------------------------------------------------------------- 1716 */ 1717 void 1718 Parse_AddIncludeDir (dir) 1719 char *dir; /* The name of the directory to add */ 1720 { 1721 (void) Dir_AddDir (parseIncPath, dir); 1722 } 1723 1724 /*- 1725 *--------------------------------------------------------------------- 1726 * ParseDoInclude -- 1727 * Push to another file. 1728 * 1729 * The input is the line minus the `.'. A file spec is a string 1730 * enclosed in <> or "". The former is looked for only in sysIncPath. 1731 * The latter in . and the directories specified by -I command line 1732 * options 1733 * 1734 * Results: 1735 * None 1736 * 1737 * Side Effects: 1738 * A structure is added to the includes Lst and readProc, lineno, 1739 * fname and curFILE are altered for the new file 1740 *--------------------------------------------------------------------- 1741 */ 1742 static void 1743 ParseDoInclude (line) 1744 char *line; 1745 { 1746 char *fullname; /* full pathname of file */ 1747 IFile *oldFile; /* state associated with current file */ 1748 char endc; /* the character which ends the file spec */ 1749 char *cp; /* current position in file spec */ 1750 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1751 int silent = (*line != 'i') ? 1 : 0; 1752 char *file = &line[7 + silent]; 1753 1754 /* 1755 * Skip to delimiter character so we know where to look 1756 */ 1757 while ((*file == ' ') || (*file == '\t')) { 1758 file++; 1759 } 1760 1761 if ((*file != '"') && (*file != '<')) { 1762 Parse_Error (PARSE_FATAL, 1763 ".include filename must be delimited by '\"' or '<'"); 1764 return; 1765 } 1766 1767 /* 1768 * Set the search path on which to find the include file based on the 1769 * characters which bracket its name. Angle-brackets imply it's 1770 * a system Makefile while double-quotes imply it's a user makefile 1771 */ 1772 if (*file == '<') { 1773 isSystem = TRUE; 1774 endc = '>'; 1775 } else { 1776 isSystem = FALSE; 1777 endc = '"'; 1778 } 1779 1780 /* 1781 * Skip to matching delimiter 1782 */ 1783 for (cp = ++file; *cp && *cp != endc; cp++) { 1784 continue; 1785 } 1786 1787 if (*cp != endc) { 1788 Parse_Error (PARSE_FATAL, 1789 "Unclosed %cinclude filename. '%c' expected", 1790 '.', endc); 1791 return; 1792 } 1793 *cp = '\0'; 1794 1795 /* 1796 * Substitute for any variables in the file name before trying to 1797 * find the thing. 1798 */ 1799 file = Var_Subst (NULL, file, VAR_CMD, FALSE); 1800 1801 /* 1802 * Now we know the file's name and its search path, we attempt to 1803 * find the durn thing. A return of NULL indicates the file don't 1804 * exist. 1805 */ 1806 fullname = (char *)NULL; 1807 1808 if (!isSystem) { 1809 /* 1810 * Include files contained in double-quotes are first searched for 1811 * relative to the including file's location. We don't want to 1812 * cd there, of course, so we just tack on the old file's 1813 * leading path components and call Dir_FindFile to see if 1814 * we can locate the beast. 1815 */ 1816 char *prefEnd, *Fname; 1817 1818 /* Make a temporary copy of this, to be safe. */ 1819 Fname = estrdup(fname); 1820 1821 prefEnd = strrchr (Fname, '/'); 1822 if (prefEnd != (char *)NULL) { 1823 char *newName; 1824 1825 *prefEnd = '\0'; 1826 if (file[0] == '/') 1827 newName = estrdup(file); 1828 else 1829 newName = str_concat (Fname, file, STR_ADDSLASH); 1830 fullname = Dir_FindFile (newName, parseIncPath); 1831 if (fullname == (char *)NULL) { 1832 fullname = Dir_FindFile(newName, dirSearchPath); 1833 } 1834 free (newName); 1835 *prefEnd = '/'; 1836 } else { 1837 fullname = (char *)NULL; 1838 } 1839 free (Fname); 1840 if (fullname == (char *)NULL) { 1841 /* 1842 * Makefile wasn't found in same directory as included makefile. 1843 * Search for it first on the -I search path, 1844 * then on the .PATH search path, if not found in a -I directory. 1845 * XXX: Suffix specific? 1846 */ 1847 fullname = Dir_FindFile (file, parseIncPath); 1848 if (fullname == (char *)NULL) { 1849 fullname = Dir_FindFile(file, dirSearchPath); 1850 } 1851 } 1852 } 1853 1854 /* Looking for a system file or file still not found */ 1855 if (fullname == (char *)NULL) { 1856 /* 1857 * Look for it on the system path 1858 */ 1859 fullname = Dir_FindFile(file, Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1860 } 1861 1862 if (fullname == (char *) NULL) { 1863 *cp = endc; 1864 if (!silent) 1865 Parse_Error (PARSE_FATAL, "Could not find %s", file); 1866 return; 1867 } 1868 1869 free(file); 1870 1871 /* 1872 * Once we find the absolute path to the file, we get to save all the 1873 * state from the current file before we can start reading this 1874 * include file. The state is stored in an IFile structure which 1875 * is placed on a list with other IFile structures. The list makes 1876 * a very nice stack to track how we got here... 1877 */ 1878 oldFile = (IFile *) emalloc (sizeof (IFile)); 1879 oldFile->fname = fname; 1880 1881 oldFile->F = curFILE; 1882 oldFile->p = curPTR; 1883 oldFile->lineno = lineno; 1884 1885 (void) Lst_AtFront (includes, (ClientData)oldFile); 1886 1887 /* 1888 * Once the previous state has been saved, we can get down to reading 1889 * the new file. We set up the name of the file to be the absolute 1890 * name of the include file so error messages refer to the right 1891 * place. Naturally enough, we start reading at line number 0. 1892 */ 1893 fname = fullname; 1894 lineno = 0; 1895 1896 ParseSetParseFile(fname); 1897 1898 curFILE = fopen (fullname, "r"); 1899 curPTR = NULL; 1900 if (curFILE == (FILE * ) NULL) { 1901 if (!silent) 1902 Parse_Error (PARSE_FATAL, "Cannot open %s", fullname); 1903 /* 1904 * Pop to previous file 1905 */ 1906 (void) ParseEOF(0); 1907 } 1908 } 1909 1910 1911 /*- 1912 *--------------------------------------------------------------------- 1913 * ParseSetParseFile -- 1914 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 1915 * basename of the given filename 1916 * 1917 * Results: 1918 * None 1919 * 1920 * Side Effects: 1921 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 1922 * dirname and basename of the given filename. 1923 *--------------------------------------------------------------------- 1924 */ 1925 static void 1926 ParseSetParseFile(filename) 1927 char *filename; 1928 { 1929 char *slash; 1930 1931 slash = strrchr(filename, '/'); 1932 if (slash == 0) { 1933 Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0); 1934 Var_Set(".PARSEFILE", filename, VAR_GLOBAL, 0); 1935 } else { 1936 *slash = '\0'; 1937 Var_Set(".PARSEDIR", filename, VAR_GLOBAL, 0); 1938 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0); 1939 *slash = '/'; 1940 } 1941 } 1942 1943 1944 /*- 1945 *--------------------------------------------------------------------- 1946 * Parse_FromString -- 1947 * Start Parsing from the given string 1948 * 1949 * Results: 1950 * None 1951 * 1952 * Side Effects: 1953 * A structure is added to the includes Lst and readProc, lineno, 1954 * fname and curFILE are altered for the new file 1955 *--------------------------------------------------------------------- 1956 */ 1957 void 1958 Parse_FromString(str) 1959 char *str; 1960 { 1961 IFile *oldFile; /* state associated with this file */ 1962 1963 if (DEBUG(FOR)) 1964 (void) fprintf(stderr, "%s\n----\n", str); 1965 1966 oldFile = (IFile *) emalloc (sizeof (IFile)); 1967 oldFile->lineno = lineno; 1968 oldFile->fname = fname; 1969 oldFile->F = curFILE; 1970 oldFile->p = curPTR; 1971 1972 (void) Lst_AtFront (includes, (ClientData)oldFile); 1973 1974 curFILE = NULL; 1975 curPTR = (PTR *) emalloc (sizeof (PTR)); 1976 curPTR->str = curPTR->ptr = str; 1977 lineno = 0; 1978 fname = estrdup(fname); 1979 } 1980 1981 1982 #ifdef SYSVINCLUDE 1983 /*- 1984 *--------------------------------------------------------------------- 1985 * ParseTraditionalInclude -- 1986 * Push to another file. 1987 * 1988 * The input is the current line. The file name(s) are 1989 * following the "include". 1990 * 1991 * Results: 1992 * None 1993 * 1994 * Side Effects: 1995 * A structure is added to the includes Lst and readProc, lineno, 1996 * fname and curFILE are altered for the new file 1997 *--------------------------------------------------------------------- 1998 */ 1999 static void 2000 ParseTraditionalInclude (line) 2001 char *line; 2002 { 2003 char *fullname; /* full pathname of file */ 2004 IFile *oldFile; /* state associated with current file */ 2005 char *cp; /* current position in file spec */ 2006 char *prefEnd; 2007 int done = 0; 2008 int silent = (line[0] != 'i') ? 1 : 0; 2009 char *file = &line[silent + 7]; 2010 char *cfname = fname; 2011 size_t clineno = lineno; 2012 2013 2014 /* 2015 * Skip over whitespace 2016 */ 2017 while (isspace((unsigned char)*file)) 2018 file++; 2019 2020 if (*file == '\0') { 2021 Parse_Error (PARSE_FATAL, 2022 "Filename missing from \"include\""); 2023 return; 2024 } 2025 2026 for (; !done; file = cp + 1) { 2027 /* 2028 * Skip to end of line or next whitespace 2029 */ 2030 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2031 continue; 2032 2033 if (*cp) 2034 *cp = '\0'; 2035 else 2036 done = 1; 2037 2038 /* 2039 * Substitute for any variables in the file name before trying to 2040 * find the thing. 2041 */ 2042 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 2043 2044 /* 2045 * Now we know the file's name, we attempt to find the durn thing. 2046 * A return of NULL indicates the file don't exist. 2047 * 2048 * Include files are first searched for relative to the including 2049 * file's location. We don't want to cd there, of course, so we 2050 * just tack on the old file's leading path components and call 2051 * Dir_FindFile to see if we can locate the beast. 2052 * XXX - this *does* search in the current directory, right? 2053 */ 2054 2055 prefEnd = strrchr(cfname, '/'); 2056 if (prefEnd != NULL) { 2057 char *newName; 2058 2059 *prefEnd = '\0'; 2060 newName = str_concat(cfname, file, STR_ADDSLASH); 2061 fullname = Dir_FindFile(newName, parseIncPath); 2062 if (fullname == NULL) { 2063 fullname = Dir_FindFile(newName, dirSearchPath); 2064 } 2065 free (newName); 2066 *prefEnd = '/'; 2067 } else { 2068 fullname = NULL; 2069 } 2070 2071 if (fullname == NULL) { 2072 /* 2073 * System makefile or makefile wasn't found in same directory as 2074 * included makefile. Search for it first on the -I search path, 2075 * then on the .PATH search path, if not found in a 2076 * -I directory. XXX: Suffix specific? 2077 */ 2078 fullname = Dir_FindFile(file, parseIncPath); 2079 if (fullname == NULL) { 2080 fullname = Dir_FindFile(file, dirSearchPath); 2081 } 2082 } 2083 2084 if (fullname == NULL) { 2085 /* 2086 * Still haven't found the makefile. Look for it on the system 2087 * path as a last resort. 2088 */ 2089 fullname = Dir_FindFile(file, 2090 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2091 } 2092 2093 if (fullname == NULL) { 2094 if (!silent) 2095 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2096 "Could not find %s", file); 2097 free(file); 2098 continue; 2099 } 2100 2101 free(file); 2102 2103 /* 2104 * Once we find the absolute path to the file, we get to save all 2105 * the state from the current file before we can start reading this 2106 * include file. The state is stored in an IFile structure which 2107 * is placed on a list with other IFile structures. The list makes 2108 * a very nice stack to track how we got here... 2109 */ 2110 oldFile = (IFile *) emalloc(sizeof(IFile)); 2111 oldFile->fname = fname; 2112 2113 oldFile->F = curFILE; 2114 oldFile->p = curPTR; 2115 oldFile->lineno = lineno; 2116 2117 (void) Lst_AtFront(includes, (ClientData)oldFile); 2118 2119 /* 2120 * Once the previous state has been saved, we can get down to 2121 * reading the new file. We set up the name of the file to be the 2122 * absolute name of the include file so error messages refer to the 2123 * right place. Naturally enough, we start reading at line number 0. 2124 */ 2125 fname = fullname; 2126 lineno = 0; 2127 2128 curFILE = fopen(fullname, "r"); 2129 curPTR = NULL; 2130 if (curFILE == NULL) { 2131 if (!silent) 2132 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2133 "Cannot open %s", fullname); 2134 /* 2135 * Pop to previous file 2136 */ 2137 (void) ParseEOF(1); 2138 } 2139 } 2140 } 2141 #endif 2142 2143 /*- 2144 *--------------------------------------------------------------------- 2145 * ParseEOF -- 2146 * Called when EOF is reached in the current file. If we were reading 2147 * an include file, the includes stack is popped and things set up 2148 * to go back to reading the previous file at the previous location. 2149 * 2150 * Results: 2151 * CONTINUE if there's more to do. DONE if not. 2152 * 2153 * Side Effects: 2154 * The old curFILE, is closed. The includes list is shortened. 2155 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2156 *--------------------------------------------------------------------- 2157 */ 2158 static int 2159 ParseEOF (opened) 2160 int opened; 2161 { 2162 IFile *ifile; /* the state on the top of the includes stack */ 2163 2164 if (Lst_IsEmpty (includes)) { 2165 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2166 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2167 return (DONE); 2168 } 2169 2170 ifile = (IFile *) Lst_DeQueue (includes); 2171 free ((Address) fname); 2172 fname = ifile->fname; 2173 lineno = ifile->lineno; 2174 if (opened && curFILE) 2175 (void) fclose (curFILE); 2176 if (curPTR) { 2177 free((Address) curPTR->str); 2178 free((Address) curPTR); 2179 } 2180 curFILE = ifile->F; 2181 curPTR = ifile->p; 2182 free ((Address)ifile); 2183 2184 /* pop the PARSEDIR/PARSEFILE variables */ 2185 ParseSetParseFile(fname); 2186 return (CONTINUE); 2187 } 2188 2189 /*- 2190 *--------------------------------------------------------------------- 2191 * ParseReadc -- 2192 * Read a character from the current file 2193 * 2194 * Results: 2195 * The character that was read 2196 * 2197 * Side Effects: 2198 *--------------------------------------------------------------------- 2199 */ 2200 static __inline int 2201 ParseReadc() 2202 { 2203 if (curFILE) 2204 return fgetc(curFILE); 2205 2206 if (curPTR && *curPTR->ptr) 2207 return *curPTR->ptr++; 2208 return EOF; 2209 } 2210 2211 2212 /*- 2213 *--------------------------------------------------------------------- 2214 * ParseUnreadc -- 2215 * Put back a character to the current file 2216 * 2217 * Results: 2218 * None. 2219 * 2220 * Side Effects: 2221 *--------------------------------------------------------------------- 2222 */ 2223 static void 2224 ParseUnreadc(c) 2225 int c; 2226 { 2227 if (curFILE) { 2228 ungetc(c, curFILE); 2229 return; 2230 } 2231 if (curPTR) { 2232 *--(curPTR->ptr) = c; 2233 return; 2234 } 2235 } 2236 2237 2238 /* ParseSkipLine(): 2239 * Grab the next line 2240 */ 2241 static char * 2242 ParseSkipLine(skip) 2243 int skip; /* Skip lines that don't start with . */ 2244 { 2245 char *line; 2246 int c, lastc, lineLength = 0; 2247 Buffer buf; 2248 2249 buf = Buf_Init(MAKE_BSIZE); 2250 2251 do { 2252 Buf_Discard(buf, lineLength); 2253 lastc = '\0'; 2254 2255 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2256 && c != EOF) { 2257 if (c == '\n') { 2258 Buf_ReplaceLastByte(buf, (Byte)' '); 2259 lineno++; 2260 2261 while ((c = ParseReadc()) == ' ' || c == '\t'); 2262 2263 if (c == EOF) 2264 break; 2265 } 2266 2267 Buf_AddByte(buf, (Byte)c); 2268 lastc = c; 2269 } 2270 2271 if (c == EOF) { 2272 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2273 Buf_Destroy(buf, TRUE); 2274 return((char *)NULL); 2275 } 2276 2277 lineno++; 2278 Buf_AddByte(buf, (Byte)'\0'); 2279 line = (char *)Buf_GetAll(buf, &lineLength); 2280 } while (skip == 1 && line[0] != '.'); 2281 2282 Buf_Destroy(buf, FALSE); 2283 return line; 2284 } 2285 2286 2287 /*- 2288 *--------------------------------------------------------------------- 2289 * ParseReadLine -- 2290 * Read an entire line from the input file. Called only by Parse_File. 2291 * To facilitate escaped newlines and what have you, a character is 2292 * buffered in 'lastc', which is '\0' when no characters have been 2293 * read. When we break out of the loop, c holds the terminating 2294 * character and lastc holds a character that should be added to 2295 * the line (unless we don't read anything but a terminator). 2296 * 2297 * Results: 2298 * A line w/o its newline 2299 * 2300 * Side Effects: 2301 * Only those associated with reading a character 2302 *--------------------------------------------------------------------- 2303 */ 2304 static char * 2305 ParseReadLine () 2306 { 2307 Buffer buf; /* Buffer for current line */ 2308 register int c; /* the current character */ 2309 register int lastc; /* The most-recent character */ 2310 Boolean semiNL; /* treat semi-colons as newlines */ 2311 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2312 * for the purposes of setting semiNL */ 2313 Boolean ignComment; /* TRUE if should ignore comments (in a 2314 * shell command */ 2315 char *line; /* Result */ 2316 char *ep; /* to strip trailing blanks */ 2317 int lineLength; /* Length of result */ 2318 2319 semiNL = FALSE; 2320 ignDepOp = FALSE; 2321 ignComment = FALSE; 2322 2323 /* 2324 * Handle special-characters at the beginning of the line. Either a 2325 * leading tab (shell command) or pound-sign (possible conditional) 2326 * forces us to ignore comments and dependency operators and treat 2327 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2328 * discards completely blank lines. 2329 */ 2330 for (;;) { 2331 c = ParseReadc(); 2332 2333 if (c == '\t') { 2334 ignComment = ignDepOp = TRUE; 2335 break; 2336 } else if (c == '\n') { 2337 lineno++; 2338 } else if (c == '#') { 2339 ParseUnreadc(c); 2340 break; 2341 } else { 2342 /* 2343 * Anything else breaks out without doing anything 2344 */ 2345 break; 2346 } 2347 } 2348 2349 if (c != EOF) { 2350 lastc = c; 2351 buf = Buf_Init(MAKE_BSIZE); 2352 2353 while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) && 2354 (c != EOF)) 2355 { 2356 test_char: 2357 switch(c) { 2358 case '\n': 2359 /* 2360 * Escaped newline: read characters until a non-space or an 2361 * unescaped newline and replace them all by a single space. 2362 * This is done by storing the space over the backslash and 2363 * dropping through with the next nonspace. If it is a 2364 * semi-colon and semiNL is TRUE, it will be recognized as a 2365 * newline in the code below this... 2366 */ 2367 lineno++; 2368 lastc = ' '; 2369 while ((c = ParseReadc ()) == ' ' || c == '\t') { 2370 continue; 2371 } 2372 if (c == EOF || c == '\n') { 2373 goto line_read; 2374 } else { 2375 /* 2376 * Check for comments, semiNL's, etc. -- easier than 2377 * ParseUnreadc(c); continue; 2378 */ 2379 goto test_char; 2380 } 2381 /*NOTREACHED*/ 2382 break; 2383 2384 case ';': 2385 /* 2386 * Semi-colon: Need to see if it should be interpreted as a 2387 * newline 2388 */ 2389 if (semiNL) { 2390 /* 2391 * To make sure the command that may be following this 2392 * semi-colon begins with a tab, we push one back into the 2393 * input stream. This will overwrite the semi-colon in the 2394 * buffer. If there is no command following, this does no 2395 * harm, since the newline remains in the buffer and the 2396 * whole line is ignored. 2397 */ 2398 ParseUnreadc('\t'); 2399 goto line_read; 2400 } 2401 break; 2402 case '=': 2403 if (!semiNL) { 2404 /* 2405 * Haven't seen a dependency operator before this, so this 2406 * must be a variable assignment -- don't pay attention to 2407 * dependency operators after this. 2408 */ 2409 ignDepOp = TRUE; 2410 } else if (lastc == ':' || lastc == '!') { 2411 /* 2412 * Well, we've seen a dependency operator already, but it 2413 * was the previous character, so this is really just an 2414 * expanded variable assignment. Revert semi-colons to 2415 * being just semi-colons again and ignore any more 2416 * dependency operators. 2417 * 2418 * XXX: Note that a line like "foo : a:=b" will blow up, 2419 * but who'd write a line like that anyway? 2420 */ 2421 ignDepOp = TRUE; semiNL = FALSE; 2422 } 2423 break; 2424 case '#': 2425 if (!ignComment) { 2426 if ( 2427 #if 0 2428 compatMake && 2429 #endif 2430 (lastc != '\\')) { 2431 /* 2432 * If the character is a hash mark and it isn't escaped 2433 * (or we're being compatible), the thing is a comment. 2434 * Skip to the end of the line. 2435 */ 2436 do { 2437 c = ParseReadc(); 2438 } while ((c != '\n') && (c != EOF)); 2439 goto line_read; 2440 } else { 2441 /* 2442 * Don't add the backslash. Just let the # get copied 2443 * over. 2444 */ 2445 lastc = c; 2446 continue; 2447 } 2448 } 2449 break; 2450 case ':': 2451 case '!': 2452 if (!ignDepOp && (c == ':' || c == '!')) { 2453 /* 2454 * A semi-colon is recognized as a newline only on 2455 * dependency lines. Dependency lines are lines with a 2456 * colon or an exclamation point. Ergo... 2457 */ 2458 semiNL = TRUE; 2459 } 2460 break; 2461 } 2462 /* 2463 * Copy in the previous character and save this one in lastc. 2464 */ 2465 Buf_AddByte (buf, (Byte)lastc); 2466 lastc = c; 2467 2468 } 2469 line_read: 2470 lineno++; 2471 2472 if (lastc != '\0') { 2473 Buf_AddByte (buf, (Byte)lastc); 2474 } 2475 Buf_AddByte (buf, (Byte)'\0'); 2476 line = (char *)Buf_GetAll (buf, &lineLength); 2477 Buf_Destroy (buf, FALSE); 2478 2479 /* 2480 * Strip trailing blanks and tabs from the line. 2481 * Do not strip a blank or tab that is preceded by 2482 * a '\' 2483 */ 2484 ep = line; 2485 while (*ep) 2486 ++ep; 2487 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2488 if (ep > line + 1 && ep[-2] == '\\') 2489 break; 2490 --ep; 2491 } 2492 *ep = 0; 2493 2494 if (line[0] == '.') { 2495 /* 2496 * The line might be a conditional. Ask the conditional module 2497 * about it and act accordingly 2498 */ 2499 switch (Cond_Eval (line)) { 2500 case COND_SKIP: 2501 /* 2502 * Skip to next conditional that evaluates to COND_PARSE. 2503 */ 2504 do { 2505 free (line); 2506 line = ParseSkipLine(1); 2507 } while (line && Cond_Eval(line) != COND_PARSE); 2508 if (line == NULL) 2509 break; 2510 /*FALLTHRU*/ 2511 case COND_PARSE: 2512 free ((Address) line); 2513 line = ParseReadLine(); 2514 break; 2515 case COND_INVALID: 2516 if (For_Eval(line)) { 2517 int ok; 2518 free(line); 2519 do { 2520 /* 2521 * Skip after the matching end 2522 */ 2523 line = ParseSkipLine(0); 2524 if (line == NULL) { 2525 Parse_Error (PARSE_FATAL, 2526 "Unexpected end of file in for loop.\n"); 2527 break; 2528 } 2529 ok = For_Eval(line); 2530 free(line); 2531 } 2532 while (ok); 2533 if (line != NULL) 2534 For_Run(); 2535 line = ParseReadLine(); 2536 } 2537 break; 2538 } 2539 } 2540 return (line); 2541 2542 } else { 2543 /* 2544 * Hit end-of-file, so return a NULL line to indicate this. 2545 */ 2546 return((char *)NULL); 2547 } 2548 } 2549 2550 /*- 2551 *----------------------------------------------------------------------- 2552 * ParseFinishLine -- 2553 * Handle the end of a dependency group. 2554 * 2555 * Results: 2556 * Nothing. 2557 * 2558 * Side Effects: 2559 * inLine set FALSE. 'targets' list destroyed. 2560 * 2561 *----------------------------------------------------------------------- 2562 */ 2563 static void 2564 ParseFinishLine() 2565 { 2566 if (inLine) { 2567 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2568 Lst_Destroy (targets, ParseHasCommands); 2569 targets = NULL; 2570 inLine = FALSE; 2571 } 2572 } 2573 2574 2575 /*- 2576 *--------------------------------------------------------------------- 2577 * Parse_File -- 2578 * Parse a file into its component parts, incorporating it into the 2579 * current dependency graph. This is the main function and controls 2580 * almost every other function in this module 2581 * 2582 * Results: 2583 * None 2584 * 2585 * Side Effects: 2586 * Loads. Nodes are added to the list of all targets, nodes and links 2587 * are added to the dependency graph. etc. etc. etc. 2588 *--------------------------------------------------------------------- 2589 */ 2590 void 2591 Parse_File(name, stream) 2592 char *name; /* the name of the file being read */ 2593 FILE * stream; /* Stream open to makefile to parse */ 2594 { 2595 register char *cp, /* pointer into the line */ 2596 *line; /* the line we're working on */ 2597 2598 inLine = FALSE; 2599 fname = name; 2600 curFILE = stream; 2601 lineno = 0; 2602 fatals = 0; 2603 2604 ParseSetParseFile(fname); 2605 2606 do { 2607 while ((line = ParseReadLine ()) != NULL) { 2608 if (*line == '.') { 2609 /* 2610 * Lines that begin with the special character are either 2611 * include or undef directives. 2612 */ 2613 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2614 continue; 2615 } 2616 if (strncmp(cp, "include", 7) == 0 || 2617 ((cp[0] == 's' || cp[0] == '-') && 2618 strncmp(&cp[1], "include", 7) == 0)) { 2619 ParseDoInclude (cp); 2620 goto nextLine; 2621 } else if (strncmp(cp, "undef", 5) == 0) { 2622 char *cp2; 2623 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2624 continue; 2625 } 2626 2627 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2628 (*cp2 != '\0'); cp2++) { 2629 continue; 2630 } 2631 2632 *cp2 = '\0'; 2633 2634 Var_Delete(cp, VAR_GLOBAL); 2635 goto nextLine; 2636 } 2637 } 2638 if (*line == '#') { 2639 /* If we're this far, the line must be a comment. */ 2640 goto nextLine; 2641 } 2642 2643 if (*line == '\t') { 2644 /* 2645 * If a line starts with a tab, it can only hope to be 2646 * a creation command. 2647 */ 2648 #ifndef POSIX 2649 shellCommand: 2650 #endif 2651 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2652 continue; 2653 } 2654 if (*cp) { 2655 if (inLine) { 2656 /* 2657 * So long as it's not a blank line and we're actually 2658 * in a dependency spec, add the command to the list of 2659 * commands of all targets in the dependency spec 2660 */ 2661 Lst_ForEach (targets, ParseAddCmd, cp); 2662 #ifdef CLEANUP 2663 Lst_AtEnd(targCmds, (ClientData) line); 2664 #endif 2665 continue; 2666 } else { 2667 Parse_Error (PARSE_FATAL, 2668 "Unassociated shell command \"%s\"", 2669 cp); 2670 } 2671 } 2672 #ifdef SYSVINCLUDE 2673 } else if (((strncmp(line, "include", 7) == 0 && 2674 isspace((unsigned char) line[7])) || 2675 ((line[0] == 's' || line[0] == '-') && 2676 strncmp(&line[1], "include", 7) == 0 && 2677 isspace((unsigned char) line[8]))) && 2678 strchr(line, ':') == NULL) { 2679 /* 2680 * It's an S3/S5-style "include". 2681 */ 2682 ParseTraditionalInclude (line); 2683 goto nextLine; 2684 #endif 2685 } else if (Parse_IsVar (line)) { 2686 ParseFinishLine(); 2687 Parse_DoVar (line, VAR_GLOBAL); 2688 } else { 2689 /* 2690 * We now know it's a dependency line so it needs to have all 2691 * variables expanded before being parsed. Tell the variable 2692 * module to complain if some variable is undefined... 2693 * To make life easier on novices, if the line is indented we 2694 * first make sure the line has a dependency operator in it. 2695 * If it doesn't have an operator and we're in a dependency 2696 * line's script, we assume it's actually a shell command 2697 * and add it to the current list of targets. 2698 */ 2699 #ifndef POSIX 2700 Boolean nonSpace = FALSE; 2701 #endif 2702 2703 cp = line; 2704 if (isspace((unsigned char) line[0])) { 2705 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2706 cp++; 2707 } 2708 if (*cp == '\0') { 2709 goto nextLine; 2710 } 2711 #ifndef POSIX 2712 while (*cp && (ParseIsEscaped(line, cp) || 2713 (*cp != ':') && (*cp != '!'))) { 2714 nonSpace = TRUE; 2715 cp++; 2716 } 2717 #endif 2718 } 2719 2720 #ifndef POSIX 2721 if (*cp == '\0') { 2722 if (inLine) { 2723 Parse_Error (PARSE_WARNING, 2724 "Shell command needs a leading tab"); 2725 goto shellCommand; 2726 } else if (nonSpace) { 2727 Parse_Error (PARSE_FATAL, "Missing operator"); 2728 } 2729 } else { 2730 #endif 2731 ParseFinishLine(); 2732 2733 cp = Var_Subst (NULL, line, VAR_CMD, TRUE); 2734 free (line); 2735 line = cp; 2736 2737 /* 2738 * Need a non-circular list for the target nodes 2739 */ 2740 if (targets) 2741 Lst_Destroy(targets, NOFREE); 2742 2743 targets = Lst_Init (FALSE); 2744 inLine = TRUE; 2745 2746 ParseDoDependency (line); 2747 #ifndef POSIX 2748 } 2749 #endif 2750 } 2751 2752 nextLine: 2753 2754 free (line); 2755 } 2756 /* 2757 * Reached EOF, but it may be just EOF of an include file... 2758 */ 2759 } while (ParseEOF(1) == CONTINUE); 2760 2761 /* 2762 * Make sure conditionals are clean 2763 */ 2764 Cond_End(); 2765 2766 if (fatals) { 2767 (void)fprintf(stderr, 2768 "%s: Fatal errors encountered -- cannot continue\n", 2769 progname); 2770 PrintOnError(NULL); 2771 exit (1); 2772 } 2773 } 2774 2775 /*- 2776 *--------------------------------------------------------------------- 2777 * Parse_Init -- 2778 * initialize the parsing module 2779 * 2780 * Results: 2781 * none 2782 * 2783 * Side Effects: 2784 * the parseIncPath list is initialized... 2785 *--------------------------------------------------------------------- 2786 */ 2787 void 2788 Parse_Init () 2789 { 2790 mainNode = NILGNODE; 2791 parseIncPath = Lst_Init (FALSE); 2792 sysIncPath = Lst_Init (FALSE); 2793 defIncPath = Lst_Init (FALSE); 2794 includes = Lst_Init (FALSE); 2795 #ifdef CLEANUP 2796 targCmds = Lst_Init (FALSE); 2797 #endif 2798 } 2799 2800 void 2801 Parse_End() 2802 { 2803 #ifdef CLEANUP 2804 Lst_Destroy(targCmds, (void (*) __P((ClientData))) free); 2805 if (targets) 2806 Lst_Destroy(targets, NOFREE); 2807 Lst_Destroy(defIncPath, Dir_Destroy); 2808 Lst_Destroy(sysIncPath, Dir_Destroy); 2809 Lst_Destroy(parseIncPath, Dir_Destroy); 2810 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2811 #endif 2812 } 2813 2814 2815 /*- 2816 *----------------------------------------------------------------------- 2817 * Parse_MainName -- 2818 * Return a Lst of the main target to create for main()'s sake. If 2819 * no such target exists, we Punt with an obnoxious error message. 2820 * 2821 * Results: 2822 * A Lst of the single node to create. 2823 * 2824 * Side Effects: 2825 * None. 2826 * 2827 *----------------------------------------------------------------------- 2828 */ 2829 Lst 2830 Parse_MainName() 2831 { 2832 Lst mainList; /* result list */ 2833 2834 mainList = Lst_Init (FALSE); 2835 2836 if (mainNode == NILGNODE) { 2837 Punt ("no target to make."); 2838 /*NOTREACHED*/ 2839 } else if (mainNode->type & OP_DOUBLEDEP) { 2840 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2841 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2842 } 2843 else 2844 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2845 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 2846 return (mainList); 2847 } 2848 2849 /*- 2850 *----------------------------------------------------------------------- 2851 * ParseMark -- 2852 * Add the filename and lineno to the GNode so that we remember 2853 * where it was first defined. 2854 * 2855 * Side Effects: 2856 * None. 2857 * 2858 *----------------------------------------------------------------------- 2859 */ 2860 static void 2861 ParseMark(gn) 2862 GNode *gn; 2863 { 2864 gn->fname = strdup(fname); 2865 gn->lineno = lineno; 2866 } 2867