1 /* $NetBSD: parse.c,v 1.93 2003/07/14 18:19:13 christos 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 1.93 2003/07/14 18:19:13 christos 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 1.93 2003/07/14 18:19:13 christos 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 #include <ctype.h> 97 #include <errno.h> 98 #include <stdarg.h> 99 #include <stdio.h> 100 101 #include "make.h" 102 #include "hash.h" 103 #include "dir.h" 104 #include "job.h" 105 #include "buf.h" 106 #include "pathnames.h" 107 108 /* 109 * These values are returned by ParseEOF to tell Parse_File whether to 110 * CONTINUE parsing, i.e. it had only reached the end of an include file, 111 * or if it's DONE. 112 */ 113 #define CONTINUE 1 114 #define DONE 0 115 static Lst targets; /* targets we're working on */ 116 #ifdef CLEANUP 117 static Lst targCmds; /* command lines for targets */ 118 #endif 119 static Boolean inLine; /* true if currently in a dependency 120 * line or its commands */ 121 typedef struct { 122 char *str; 123 char *ptr; 124 } PTR; 125 126 static int fatals = 0; 127 128 static GNode *mainNode; /* The main target to create. This is the 129 * first target on the first dependency 130 * line in the first makefile */ 131 typedef struct IFile { 132 char *fname; /* name of previous file */ 133 int lineno; /* saved line number */ 134 FILE * F; /* the open stream */ 135 PTR * P; /* the char pointer */ 136 } IFile; 137 138 static IFile curFile; 139 140 141 /* 142 * Definitions for handling #include specifications 143 */ 144 145 static Lst includes; /* stack of IFiles generated by 146 * #includes */ 147 Lst parseIncPath; /* list of directories for "..." includes */ 148 Lst sysIncPath; /* list of directories for <...> includes */ 149 Lst defIncPath; /* default directories for <...> includes */ 150 151 /*- 152 * specType contains the SPECial TYPE of the current target. It is 153 * Not if the target is unspecial. If it *is* special, however, the children 154 * are linked as children of the parent but not vice versa. This variable is 155 * set in ParseDoDependency 156 */ 157 typedef enum { 158 Begin, /* .BEGIN */ 159 Default, /* .DEFAULT */ 160 End, /* .END */ 161 Ignore, /* .IGNORE */ 162 Includes, /* .INCLUDES */ 163 Interrupt, /* .INTERRUPT */ 164 Libs, /* .LIBS */ 165 MFlags, /* .MFLAGS or .MAKEFLAGS */ 166 Main, /* .MAIN and we don't have anything user-specified to 167 * make */ 168 NoExport, /* .NOEXPORT */ 169 NoPath, /* .NOPATH */ 170 Not, /* Not special */ 171 NotParallel, /* .NOTPARALLEL */ 172 Null, /* .NULL */ 173 ExObjdir, /* .OBJDIR */ 174 Order, /* .ORDER */ 175 Parallel, /* .PARALLEL */ 176 ExPath, /* .PATH */ 177 Phony, /* .PHONY */ 178 #ifdef POSIX 179 Posix, /* .POSIX */ 180 #endif 181 Precious, /* .PRECIOUS */ 182 ExShell, /* .SHELL */ 183 Silent, /* .SILENT */ 184 SingleShell, /* .SINGLESHELL */ 185 Suffixes, /* .SUFFIXES */ 186 Wait, /* .WAIT */ 187 Attribute /* Generic attribute */ 188 } ParseSpecial; 189 190 static ParseSpecial specType; 191 static int waiting; 192 193 #define LPAREN '(' 194 #define RPAREN ')' 195 /* 196 * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER 197 * seen, then set to each successive source on the line. 198 */ 199 static GNode *predecessor; 200 201 /* 202 * The parseKeywords table is searched using binary search when deciding 203 * if a target or source is special. The 'spec' field is the ParseSpecial 204 * type of the keyword ("Not" if the keyword isn't special as a target) while 205 * the 'op' field is the operator to apply to the list of targets if the 206 * keyword is used as a source ("0" if the keyword isn't special as a source) 207 */ 208 static struct { 209 const char *name; /* Name of keyword */ 210 ParseSpecial spec; /* Type when used as a target */ 211 int op; /* Operator when used as a source */ 212 } parseKeywords[] = { 213 { ".BEGIN", Begin, 0 }, 214 { ".DEFAULT", Default, 0 }, 215 { ".END", End, 0 }, 216 { ".EXEC", Attribute, OP_EXEC }, 217 { ".IGNORE", Ignore, OP_IGNORE }, 218 { ".INCLUDES", Includes, 0 }, 219 { ".INTERRUPT", Interrupt, 0 }, 220 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 221 { ".JOIN", Attribute, OP_JOIN }, 222 { ".LIBS", Libs, 0 }, 223 { ".MADE", Attribute, OP_MADE }, 224 { ".MAIN", Main, 0 }, 225 { ".MAKE", Attribute, OP_MAKE }, 226 { ".MAKEFLAGS", MFlags, 0 }, 227 { ".MFLAGS", MFlags, 0 }, 228 { ".NOPATH", NoPath, OP_NOPATH }, 229 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 230 { ".NOTPARALLEL", NotParallel, 0 }, 231 { ".NO_PARALLEL", NotParallel, 0 }, 232 { ".NULL", Null, 0 }, 233 { ".OBJDIR", ExObjdir, 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 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 250 { ".WAIT", Wait, 0 }, 251 }; 252 253 /* 254 * Used by ParseDoSpecialSrc() 255 */ 256 typedef struct { 257 int op; 258 char *src; 259 Lst allsrc; 260 } SpecialSrc; 261 262 static int ParseIsEscaped(const char *, const char *); 263 static void ParseErrorInternal(char *, size_t, int, const char *, ...) 264 __attribute__((__format__(__printf__, 4, 5))); 265 static void ParseVErrorInternal(char *, size_t, int, const char *, va_list) 266 __attribute__((__format__(__printf__, 4, 0))); 267 static int ParseFindKeyword(char *); 268 static int ParseLinkSrc(ClientData, ClientData); 269 static int ParseDoOp(ClientData, ClientData); 270 static int ParseAddDep(ClientData, ClientData); 271 static int ParseDoSpecialSrc(ClientData, ClientData); 272 static void ParseDoSrc(int, char *, Lst, Boolean); 273 static int ParseFindMain(ClientData, ClientData); 274 static int ParseAddDir(ClientData, ClientData); 275 static int ParseClearPath(ClientData, ClientData); 276 static void ParseDoDependency(char *); 277 static int ParseAddCmd(ClientData, ClientData); 278 static __inline int ParseReadc(void); 279 static void ParseUnreadc(int); 280 static void ParseHasCommands(ClientData); 281 static void ParseDoInclude(char *); 282 static void ParseSetParseFile(char *); 283 #ifdef SYSVINCLUDE 284 static void ParseTraditionalInclude(char *); 285 #endif 286 static int ParseEOF(int); 287 static char *ParseReadLine(void); 288 static char *ParseSkipLine(int); 289 static void ParseFinishLine(void); 290 static void ParseMark(GNode *); 291 292 extern int maxJobs; 293 294 295 /*- 296 *---------------------------------------------------------------------- 297 * ParseIsEscaped -- 298 * Check if the current character is escaped on the current line 299 * 300 * Results: 301 * 0 if the character is not backslash escaped, 1 otherwise 302 * 303 * Side Effects: 304 * None 305 *---------------------------------------------------------------------- 306 */ 307 static int 308 ParseIsEscaped(const char *line, const char *c) 309 { 310 int active = 0; 311 for (;;) { 312 if (line == c) 313 return active; 314 if (*--c != '\\') 315 return active; 316 active = !active; 317 } 318 } 319 320 /*- 321 *---------------------------------------------------------------------- 322 * ParseFindKeyword -- 323 * Look in the table of keywords for one matching the given string. 324 * 325 * Input: 326 * str String to find 327 * 328 * Results: 329 * The index of the keyword, or -1 if it isn't there. 330 * 331 * Side Effects: 332 * None 333 *---------------------------------------------------------------------- 334 */ 335 static int 336 ParseFindKeyword(char *str) 337 { 338 int start, end, cur; 339 int diff; 340 341 start = 0; 342 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 343 344 do { 345 cur = start + ((end - start) / 2); 346 diff = strcmp (str, parseKeywords[cur].name); 347 348 if (diff == 0) { 349 return (cur); 350 } else if (diff < 0) { 351 end = cur - 1; 352 } else { 353 start = cur + 1; 354 } 355 } while (start <= end); 356 return (-1); 357 } 358 359 /*- 360 * ParseVErrorInternal -- 361 * Error message abort function for parsing. Prints out the context 362 * of the error (line number and file) as well as the message with 363 * two optional arguments. 364 * 365 * Results: 366 * None 367 * 368 * Side Effects: 369 * "fatals" is incremented if the level is PARSE_FATAL. 370 */ 371 /* VARARGS */ 372 static void 373 ParseVErrorInternal(char *cfname, size_t clineno, int type, const char *fmt, 374 va_list ap) 375 { 376 static Boolean fatal_warning_error_printed = FALSE; 377 378 (void)fprintf(stderr, "%s: \"", progname); 379 380 if (*cfname != '/') { 381 char *cp; 382 const char *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 ParseErrorInternal(char *cfname, size_t clineno, int type, const char *fmt, ...) 426 { 427 va_list ap; 428 429 va_start(ap, fmt); 430 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 431 va_end(ap); 432 } 433 434 /*- 435 * Parse_Error -- 436 * External interface to ParseErrorInternal; uses the default filename 437 * Line number. 438 * 439 * Results: 440 * None 441 * 442 * Side Effects: 443 * None 444 */ 445 /* VARARGS */ 446 void 447 Parse_Error(int type, const char *fmt, ...) 448 { 449 va_list ap; 450 451 va_start(ap, fmt); 452 ParseVErrorInternal(curFile.fname, curFile.lineno, type, fmt, ap); 453 va_end(ap); 454 } 455 456 /*- 457 *--------------------------------------------------------------------- 458 * ParseLinkSrc -- 459 * Link the parent node to its new child. Used in a Lst_ForEach by 460 * ParseDoDependency. If the specType isn't 'Not', the parent 461 * isn't linked as a parent of the child. 462 * 463 * Input: 464 * pgnp The parent node 465 * cgpn The child node 466 * 467 * Results: 468 * Always = 0 469 * 470 * Side Effects: 471 * New elements are added to the parents list of cgn and the 472 * children list of cgn. the unmade field of pgn is updated 473 * to reflect the additional child. 474 *--------------------------------------------------------------------- 475 */ 476 static int 477 ParseLinkSrc(ClientData pgnp, ClientData cgnp) 478 { 479 GNode *pgn = (GNode *) pgnp; 480 GNode *cgn = (GNode *) cgnp; 481 482 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 483 pgn = (GNode *) Lst_Datum (Lst_Last (pgn->cohorts)); 484 (void)Lst_AtEnd (pgn->children, (ClientData)cgn); 485 if (specType == Not) 486 (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); 487 pgn->unmade += 1; 488 return (0); 489 } 490 491 /*- 492 *--------------------------------------------------------------------- 493 * ParseDoOp -- 494 * Apply the parsed operator to the given target node. Used in a 495 * Lst_ForEach call by ParseDoDependency once all targets have 496 * been found and their operator parsed. If the previous and new 497 * operators are incompatible, a major error is taken. 498 * 499 * Input: 500 * gnp The node to which the operator is to be applied 501 * opp The operator to apply 502 * 503 * Results: 504 * Always 0 505 * 506 * Side Effects: 507 * The type field of the node is altered to reflect any new bits in 508 * the op. 509 *--------------------------------------------------------------------- 510 */ 511 static int 512 ParseDoOp(ClientData gnp, ClientData opp) 513 { 514 GNode *gn = (GNode *) gnp; 515 int op = *(int *) opp; 516 /* 517 * If the dependency mask of the operator and the node don't match and 518 * the node has actually had an operator applied to it before, and 519 * the operator actually has some dependency information in it, complain. 520 */ 521 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 522 !OP_NOP(gn->type) && !OP_NOP(op)) 523 { 524 Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name); 525 return (1); 526 } 527 528 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 529 /* 530 * If the node was the object of a :: operator, we need to create a 531 * new instance of it for the children and commands on this dependency 532 * line. The new instance is placed on the 'cohorts' list of the 533 * initial one (note the initial one is not on its own cohorts list) 534 * and the new instance is linked to all parents of the initial 535 * instance. 536 */ 537 GNode *cohort; 538 539 /* 540 * Propagate copied bits to the initial node. They'll be propagated 541 * back to the rest of the cohorts later. 542 */ 543 gn->type |= op & ~OP_OPMASK; 544 545 cohort = Targ_NewGN(gn->name); 546 /* 547 * Make the cohort invisible as well to avoid duplicating it into 548 * other variables. True, parents of this target won't tend to do 549 * anything with their local variables, but better safe than 550 * sorry. (I think this is pointless now, since the relevant list 551 * traversals will no longer see this node anyway. -mycroft) 552 */ 553 cohort->type = op | OP_INVISIBLE; 554 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 555 cohort->centurion = gn; 556 gn->unmade_cohorts += 1; 557 } else { 558 /* 559 * We don't want to nuke any previous flags (whatever they were) so we 560 * just OR the new operator into the old 561 */ 562 gn->type |= op; 563 } 564 565 return (0); 566 } 567 568 /*- 569 *--------------------------------------------------------------------- 570 * ParseAddDep -- 571 * Check if the pair of GNodes given needs to be synchronized. 572 * This has to be when two nodes are on different sides of a 573 * .WAIT directive. 574 * 575 * Results: 576 * Returns 1 if the two targets need to be ordered, 0 otherwise. 577 * If it returns 1, the search can stop 578 * 579 * Side Effects: 580 * A dependency can be added between the two nodes. 581 * 582 *--------------------------------------------------------------------- 583 */ 584 static int 585 ParseAddDep(ClientData pp, ClientData sp) 586 { 587 GNode *p = (GNode *) pp; 588 GNode *s = (GNode *) sp; 589 590 if (p->order < s->order) { 591 /* 592 * XXX: This can cause loops, and loops can cause unmade targets, 593 * but checking is tedious, and the debugging output can show the 594 * problem 595 */ 596 (void)Lst_AtEnd(p->successors, (ClientData)s); 597 (void)Lst_AtEnd(s->preds, (ClientData)p); 598 return 0; 599 } 600 else 601 return 1; 602 } 603 604 /* - 605 *--------------------------------------------------------------------- 606 * ParseDoSpecialSrc -- 607 * ParseDoSrc struck an unexpanded variable in a src. 608 * The most likely reason is a src that refers to .TARGET or 609 * .PREFIX so we get called to set those for each target 610 * and then call ParseDoSrc again to do the real work. 611 * 612 * Input: 613 * tp A target GNode * 614 * sp A SpecialSrc * which contains the args we need 615 * for ParseDoSrc. 616 * 617 * Results: 618 * Goodness 619 * 620 * Side Effects: 621 * The target GNode will have .TARGET and .PREFIX set, this seems 622 * harmless. 623 */ 624 static int 625 ParseDoSpecialSrc(ClientData tp, ClientData sp) 626 { 627 GNode *tn = (GNode *) tp; 628 GNode *gn; 629 SpecialSrc *ss = (SpecialSrc *) sp; 630 char *cp; 631 char *cp2; 632 char *pref; 633 634 /* 635 * If the target is a suffix rule, leave it alone. 636 */ 637 if (Suff_IsTransform(tn->name)) { 638 ParseDoSrc(ss->op, ss->src, ss->allsrc, FALSE); /* don't come back */ 639 return 0; 640 } 641 Var_Set(TARGET, tn->name, tn, 0); 642 if ((pref = strrchr(tn->name, '/'))) 643 pref++; 644 else 645 pref = tn->name; 646 if ((cp2 = strchr(pref, '.')) > pref) { 647 cp = estrdup(pref); 648 cp[cp2 - pref] = '\0'; 649 Var_Set(PREFIX, cp, tn, 0); 650 free(cp); 651 } else 652 Var_Set(PREFIX, pref, tn, 0); 653 cp = Var_Subst(NULL, ss->src, tn, FALSE); 654 if (strchr(cp, '$')) { 655 Parse_Error(PARSE_WARNING, "Cannot resolve '%s' here", ss->src); 656 ParseDoSrc(ss->op, ss->src, ss->allsrc, FALSE); /* don't come back */ 657 return 1; /* stop list traversal */ 658 } 659 /* 660 * We don't want to make every target dependent on sources for 661 * other targets. This is the bit of ParseDoSrc which is relevant. 662 * The main difference is we don't link the resolved src to all targets. 663 */ 664 gn = Targ_FindNode (cp, TARG_CREATE); 665 if (ss->op) { 666 gn->type |= ss->op; 667 } else { 668 ParseLinkSrc((ClientData)tn, (ClientData)gn); 669 } 670 gn->order = waiting; 671 (void)Lst_AtEnd(ss->allsrc, (ClientData)gn); 672 if (waiting) { 673 Lst_ForEach(ss->allsrc, ParseAddDep, (ClientData)gn); 674 } 675 return 0; 676 } 677 678 679 /*- 680 *--------------------------------------------------------------------- 681 * ParseDoSrc -- 682 * Given the name of a source, figure out if it is an attribute 683 * and apply it to the targets if it is. Else decide if there is 684 * some attribute which should be applied *to* the source because 685 * of some special target and apply it if so. Otherwise, make the 686 * source be a child of the targets in the list 'targets' 687 * 688 * Input: 689 * tOp operator (if any) from special targets 690 * src name of the source to handle 691 * allsrc List of all sources to wait for 692 * resolve boolean - should we try and resolve .TARGET refs. 693 * 694 * Results: 695 * None 696 * 697 * Side Effects: 698 * Operator bits may be added to the list of targets or to the source. 699 * The targets may have a new source added to their lists of children. 700 *--------------------------------------------------------------------- 701 */ 702 static void 703 ParseDoSrc(int tOp, char *src, Lst allsrc, Boolean resolve) 704 { 705 GNode *gn = NULL; 706 707 if (*src == '.' && isupper ((unsigned char)src[1])) { 708 int keywd = ParseFindKeyword(src); 709 if (keywd != -1) { 710 int op = parseKeywords[keywd].op; 711 if (op != 0) { 712 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 713 return; 714 } 715 if (parseKeywords[keywd].spec == Wait) { 716 waiting++; 717 return; 718 } 719 } 720 } 721 722 switch (specType) { 723 case Main: 724 /* 725 * If we have noted the existence of a .MAIN, it means we need 726 * to add the sources of said target to the list of things 727 * to create. The string 'src' is likely to be free, so we 728 * must make a new copy of it. Note that this will only be 729 * invoked if the user didn't specify a target on the command 730 * line. This is to allow #ifmake's to succeed, or something... 731 */ 732 (void) Lst_AtEnd (create, (ClientData)estrdup(src)); 733 /* 734 * Add the name to the .TARGETS variable as well, so the user cna 735 * employ that, if desired. 736 */ 737 Var_Append(".TARGETS", src, VAR_GLOBAL); 738 return; 739 740 case Order: 741 /* 742 * Create proper predecessor/successor links between the previous 743 * source and the current one. 744 */ 745 gn = Targ_FindNode(src, TARG_CREATE); 746 if (predecessor != NILGNODE) { 747 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 748 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 749 } 750 /* 751 * The current source now becomes the predecessor for the next one. 752 */ 753 predecessor = gn; 754 break; 755 756 default: 757 /* 758 * If the source is not an attribute, we need to find/create 759 * a node for it. After that we can apply any operator to it 760 * from a special target or link it to its parents, as 761 * appropriate. 762 * 763 * In the case of a source that was the object of a :: operator, 764 * the attribute is applied to all of its instances (as kept in 765 * the 'cohorts' list of the node) or all the cohorts are linked 766 * to all the targets. 767 */ 768 if (resolve && strchr(src, '$')) { 769 SpecialSrc ss; 770 771 ss.op = tOp; 772 ss.src = src; 773 ss.allsrc = allsrc; 774 775 /* 776 * If src cannot be fully resolved, we'll be called again 777 * with resolve==FALSE. 778 */ 779 Lst_ForEach(targets, ParseDoSpecialSrc, (ClientData)&ss); 780 return; 781 } 782 gn = Targ_FindNode (src, TARG_CREATE); 783 if (tOp) { 784 gn->type |= tOp; 785 } else { 786 Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); 787 } 788 break; 789 } 790 791 gn->order = waiting; 792 (void)Lst_AtEnd(allsrc, (ClientData)gn); 793 if (waiting) { 794 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 795 } 796 } 797 798 /*- 799 *----------------------------------------------------------------------- 800 * ParseFindMain -- 801 * Find a real target in the list and set it to be the main one. 802 * Called by ParseDoDependency when a main target hasn't been found 803 * yet. 804 * 805 * Input: 806 * gnp Node to examine 807 * 808 * Results: 809 * 0 if main not found yet, 1 if it is. 810 * 811 * Side Effects: 812 * mainNode is changed and Targ_SetMain is called. 813 * 814 *----------------------------------------------------------------------- 815 */ 816 static int 817 ParseFindMain(ClientData gnp, ClientData dummy) 818 { 819 GNode *gn = (GNode *) gnp; 820 if ((gn->type & OP_NOTARGET) == 0) { 821 mainNode = gn; 822 Targ_SetMain(gn); 823 return (dummy ? 1 : 1); 824 } else { 825 return (dummy ? 0 : 0); 826 } 827 } 828 829 /*- 830 *----------------------------------------------------------------------- 831 * ParseAddDir -- 832 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 833 * 834 * Results: 835 * === 0 836 * 837 * Side Effects: 838 * See Dir_AddDir. 839 * 840 *----------------------------------------------------------------------- 841 */ 842 static int 843 ParseAddDir(ClientData path, ClientData name) 844 { 845 (void) Dir_AddDir((Lst) path, (char *) name); 846 return(0); 847 } 848 849 /*- 850 *----------------------------------------------------------------------- 851 * ParseClearPath -- 852 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 853 * 854 * Results: 855 * === 0 856 * 857 * Side Effects: 858 * See Dir_ClearPath 859 * 860 *----------------------------------------------------------------------- 861 */ 862 static int 863 ParseClearPath(ClientData path, ClientData dummy) 864 { 865 Dir_ClearPath((Lst) path); 866 return(dummy ? 0 : 0); 867 } 868 869 /*- 870 *--------------------------------------------------------------------- 871 * ParseDoDependency -- 872 * Parse the dependency line in line. 873 * 874 * Input: 875 * line the line to parse 876 * 877 * Results: 878 * None 879 * 880 * Side Effects: 881 * The nodes of the sources are linked as children to the nodes of the 882 * targets. Some nodes may be created. 883 * 884 * We parse a dependency line by first extracting words from the line and 885 * finding nodes in the list of all targets with that name. This is done 886 * until a character is encountered which is an operator character. Currently 887 * these are only ! and :. At this point the operator is parsed and the 888 * pointer into the line advanced until the first source is encountered. 889 * The parsed operator is applied to each node in the 'targets' list, 890 * which is where the nodes found for the targets are kept, by means of 891 * the ParseDoOp function. 892 * The sources are read in much the same way as the targets were except 893 * that now they are expanded using the wildcarding scheme of the C-Shell 894 * and all instances of the resulting words in the list of all targets 895 * are found. Each of the resulting nodes is then linked to each of the 896 * targets as one of its children. 897 * Certain targets are handled specially. These are the ones detailed 898 * by the specType variable. 899 * The storing of transformation rules is also taken care of here. 900 * A target is recognized as a transformation rule by calling 901 * Suff_IsTransform. If it is a transformation rule, its node is gotten 902 * from the suffix module via Suff_AddTransform rather than the standard 903 * Targ_FindNode in the target module. 904 *--------------------------------------------------------------------- 905 */ 906 static void 907 ParseDoDependency(char *line) 908 { 909 char *cp; /* our current position */ 910 GNode *gn; /* a general purpose temporary node */ 911 int op; /* the operator on the line */ 912 char savec; /* a place to save a character */ 913 Lst paths; /* List of search paths to alter when parsing 914 * a list of .PATH targets */ 915 int tOp; /* operator from special target */ 916 Lst sources; /* list of archive source names after 917 * expansion */ 918 Lst curTargs; /* list of target names to be found and added 919 * to the targets list */ 920 Lst curSrcs; /* list of sources in order */ 921 char *lstart = line; 922 Boolean hasWait; /* is .WAIT present in srcs */ 923 924 tOp = 0; 925 926 specType = Not; 927 waiting = 0; 928 paths = (Lst)NULL; 929 930 curTargs = Lst_Init(FALSE); 931 curSrcs = Lst_Init(FALSE); 932 933 do { 934 for (cp = line; 935 *cp && (ParseIsEscaped(lstart, cp) || 936 (!isspace ((unsigned char)*cp) && 937 (*cp != '!') && (*cp != ':') && (*cp != LPAREN))); 938 cp++) 939 { 940 if (*cp == '$') { 941 /* 942 * Must be a dynamic source (would have been expanded 943 * otherwise), so call the Var module to parse the puppy 944 * so we can safely advance beyond it...There should be 945 * no errors in this, as they would have been discovered 946 * in the initial Var_Subst and we wouldn't be here. 947 */ 948 int length; 949 Boolean freeIt; 950 char *result; 951 952 result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 953 954 if (freeIt) { 955 free(result); 956 } 957 cp += length-1; 958 } 959 continue; 960 } 961 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 962 /* 963 * Archives must be handled specially to make sure the OP_ARCHV 964 * flag is set in their 'type' field, for one thing, and because 965 * things like "archive(file1.o file2.o file3.o)" are permissible. 966 * Arch_ParseArchive will set 'line' to be the first non-blank 967 * after the archive-spec. It creates/finds nodes for the members 968 * and places them on the given list, returning SUCCESS if all 969 * went well and FAILURE if there was an error in the 970 * specification. On error, line should remain untouched. 971 */ 972 if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { 973 Parse_Error (PARSE_FATAL, 974 "Error in archive specification: \"%s\"", line); 975 return; 976 } else { 977 continue; 978 } 979 } 980 savec = *cp; 981 982 if (!*cp) { 983 /* 984 * Ending a dependency line without an operator is a Bozo 985 * no-no. As a heuristic, this is also often triggered by 986 * undetected conflicts from cvs/rcs merges. 987 */ 988 if ((strncmp(line, "<<<<<<", 6) == 0) || 989 (strncmp(line, "======", 6) == 0) || 990 (strncmp(line, ">>>>>>", 6) == 0)) 991 Parse_Error (PARSE_FATAL, 992 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 993 else 994 Parse_Error (PARSE_FATAL, "Need an operator"); 995 return; 996 } 997 *cp = '\0'; 998 /* 999 * Have a word in line. See if it's a special target and set 1000 * specType to match it. 1001 */ 1002 if (*line == '.' && isupper ((unsigned char)line[1])) { 1003 /* 1004 * See if the target is a special target that must have it 1005 * or its sources handled specially. 1006 */ 1007 int keywd = ParseFindKeyword(line); 1008 if (keywd != -1) { 1009 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1010 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1011 return; 1012 } 1013 1014 specType = parseKeywords[keywd].spec; 1015 tOp = parseKeywords[keywd].op; 1016 1017 /* 1018 * Certain special targets have special semantics: 1019 * .PATH Have to set the dirSearchPath 1020 * variable too 1021 * .MAIN Its sources are only used if 1022 * nothing has been specified to 1023 * create. 1024 * .DEFAULT Need to create a node to hang 1025 * commands on, but we don't want 1026 * it in the graph, nor do we want 1027 * it to be the Main Target, so we 1028 * create it, set OP_NOTMAIN and 1029 * add it to the list, setting 1030 * DEFAULT to the new node for 1031 * later use. We claim the node is 1032 * A transformation rule to make 1033 * life easier later, when we'll 1034 * use Make_HandleUse to actually 1035 * apply the .DEFAULT commands. 1036 * .PHONY The list of targets 1037 * .NOPATH Don't search for file in the path 1038 * .BEGIN 1039 * .END 1040 * .INTERRUPT Are not to be considered the 1041 * main target. 1042 * .NOTPARALLEL Make only one target at a time. 1043 * .SINGLESHELL Create a shell for each command. 1044 * .ORDER Must set initial predecessor to NIL 1045 */ 1046 switch (specType) { 1047 case ExPath: 1048 if (paths == NULL) { 1049 paths = Lst_Init(FALSE); 1050 } 1051 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 1052 break; 1053 case Main: 1054 if (!Lst_IsEmpty(create)) { 1055 specType = Not; 1056 } 1057 break; 1058 case Begin: 1059 case End: 1060 case Interrupt: 1061 gn = Targ_FindNode(line, TARG_CREATE); 1062 gn->type |= OP_NOTMAIN; 1063 (void)Lst_AtEnd(targets, (ClientData)gn); 1064 break; 1065 case Default: 1066 gn = Targ_NewGN(".DEFAULT"); 1067 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1068 (void)Lst_AtEnd(targets, (ClientData)gn); 1069 DEFAULT = gn; 1070 break; 1071 case NotParallel: 1072 { 1073 maxJobs = 1; 1074 break; 1075 } 1076 case SingleShell: 1077 compatMake = TRUE; 1078 break; 1079 case Order: 1080 predecessor = NILGNODE; 1081 break; 1082 default: 1083 break; 1084 } 1085 } else if (strncmp (line, ".PATH", 5) == 0) { 1086 /* 1087 * .PATH<suffix> has to be handled specially. 1088 * Call on the suffix module to give us a path to 1089 * modify. 1090 */ 1091 Lst path; 1092 1093 specType = ExPath; 1094 path = Suff_GetPath (&line[5]); 1095 if (path == NILLST) { 1096 Parse_Error (PARSE_FATAL, 1097 "Suffix '%s' not defined (yet)", 1098 &line[5]); 1099 return; 1100 } else { 1101 if (paths == (Lst)NULL) { 1102 paths = Lst_Init(FALSE); 1103 } 1104 (void)Lst_AtEnd(paths, (ClientData)path); 1105 } 1106 } 1107 } 1108 1109 /* 1110 * Have word in line. Get or create its node and stick it at 1111 * the end of the targets list 1112 */ 1113 if ((specType == Not) && (*line != '\0')) { 1114 if (Dir_HasWildcards(line)) { 1115 /* 1116 * Targets are to be sought only in the current directory, 1117 * so create an empty path for the thing. Note we need to 1118 * use Dir_Destroy in the destruction of the path as the 1119 * Dir module could have added a directory to the path... 1120 */ 1121 Lst emptyPath = Lst_Init(FALSE); 1122 1123 Dir_Expand(line, emptyPath, curTargs); 1124 1125 Lst_Destroy(emptyPath, Dir_Destroy); 1126 } else { 1127 /* 1128 * No wildcards, but we want to avoid code duplication, 1129 * so create a list with the word on it. 1130 */ 1131 (void)Lst_AtEnd(curTargs, (ClientData)line); 1132 } 1133 1134 while(!Lst_IsEmpty(curTargs)) { 1135 char *targName = (char *)Lst_DeQueue(curTargs); 1136 1137 if (!Suff_IsTransform (targName)) { 1138 gn = Targ_FindNode (targName, TARG_CREATE); 1139 } else { 1140 gn = Suff_AddTransform (targName); 1141 } 1142 1143 (void)Lst_AtEnd (targets, (ClientData)gn); 1144 } 1145 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1146 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1147 } 1148 1149 *cp = savec; 1150 /* 1151 * If it is a special type and not .PATH, it's the only target we 1152 * allow on this line... 1153 */ 1154 if (specType != Not && specType != ExPath) { 1155 Boolean warn = FALSE; 1156 1157 while (*cp && (ParseIsEscaped(lstart, cp) || 1158 ((*cp != '!') && (*cp != ':')))) { 1159 if (ParseIsEscaped(lstart, cp) || 1160 (*cp != ' ' && *cp != '\t')) { 1161 warn = TRUE; 1162 } 1163 cp++; 1164 } 1165 if (warn) { 1166 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1167 } 1168 } else { 1169 while (*cp && isspace ((unsigned char)*cp)) { 1170 cp++; 1171 } 1172 } 1173 line = cp; 1174 } while (*line && (ParseIsEscaped(lstart, line) || 1175 ((*line != '!') && (*line != ':')))); 1176 1177 /* 1178 * Don't need the list of target names anymore... 1179 */ 1180 Lst_Destroy(curTargs, NOFREE); 1181 1182 if (!Lst_IsEmpty(targets)) { 1183 switch(specType) { 1184 default: 1185 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1186 break; 1187 case Default: 1188 case Begin: 1189 case End: 1190 case Interrupt: 1191 /* 1192 * These four create nodes on which to hang commands, so 1193 * targets shouldn't be empty... 1194 */ 1195 case Not: 1196 /* 1197 * Nothing special here -- targets can be empty if it wants. 1198 */ 1199 break; 1200 } 1201 } 1202 1203 /* 1204 * Have now parsed all the target names. Must parse the operator next. The 1205 * result is left in op . 1206 */ 1207 if (*cp == '!') { 1208 op = OP_FORCE; 1209 } else if (*cp == ':') { 1210 if (cp[1] == ':') { 1211 op = OP_DOUBLEDEP; 1212 cp++; 1213 } else { 1214 op = OP_DEPENDS; 1215 } 1216 } else { 1217 Parse_Error (PARSE_FATAL, "Missing dependency operator"); 1218 return; 1219 } 1220 1221 cp++; /* Advance beyond operator */ 1222 1223 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 1224 1225 /* 1226 * Get to the first source 1227 */ 1228 while (*cp && isspace ((unsigned char)*cp)) { 1229 cp++; 1230 } 1231 line = cp; 1232 1233 /* 1234 * Several special targets take different actions if present with no 1235 * sources: 1236 * a .SUFFIXES line with no sources clears out all old suffixes 1237 * a .PRECIOUS line makes all targets precious 1238 * a .IGNORE line ignores errors for all targets 1239 * a .SILENT line creates silence when making all targets 1240 * a .PATH removes all directories from the search path(s). 1241 */ 1242 if (!*line) { 1243 switch (specType) { 1244 case Suffixes: 1245 Suff_ClearSuffixes (); 1246 break; 1247 case Precious: 1248 allPrecious = TRUE; 1249 break; 1250 case Ignore: 1251 ignoreErrors = TRUE; 1252 break; 1253 case Silent: 1254 beSilent = TRUE; 1255 break; 1256 case ExPath: 1257 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1258 Dir_SetPATH(); 1259 break; 1260 #ifdef POSIX 1261 case Posix: 1262 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1263 break; 1264 #endif 1265 default: 1266 break; 1267 } 1268 } else if (specType == MFlags) { 1269 /* 1270 * Call on functions in main.c to deal with these arguments and 1271 * set the initial character to a null-character so the loop to 1272 * get sources won't get anything 1273 */ 1274 Main_ParseArgLine (line); 1275 *line = '\0'; 1276 } else if (specType == ExShell) { 1277 if (Job_ParseShell (line) != SUCCESS) { 1278 Parse_Error (PARSE_FATAL, "improper shell specification"); 1279 return; 1280 } 1281 *line = '\0'; 1282 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1283 *line = '\0'; 1284 } 1285 1286 /* 1287 * NOW GO FOR THE SOURCES 1288 */ 1289 if ((specType == Suffixes) || (specType == ExPath) || 1290 (specType == Includes) || (specType == Libs) || 1291 (specType == Null) || (specType == ExObjdir)) 1292 { 1293 while (*line) { 1294 /* 1295 * If the target was one that doesn't take files as its sources 1296 * but takes something like suffixes, we take each 1297 * space-separated word on the line as a something and deal 1298 * with it accordingly. 1299 * 1300 * If the target was .SUFFIXES, we take each source as a 1301 * suffix and add it to the list of suffixes maintained by the 1302 * Suff module. 1303 * 1304 * If the target was a .PATH, we add the source as a directory 1305 * to search on the search path. 1306 * 1307 * If it was .INCLUDES, the source is taken to be the suffix of 1308 * files which will be #included and whose search path should 1309 * be present in the .INCLUDES variable. 1310 * 1311 * If it was .LIBS, the source is taken to be the suffix of 1312 * files which are considered libraries and whose search path 1313 * should be present in the .LIBS variable. 1314 * 1315 * If it was .NULL, the source is the suffix to use when a file 1316 * has no valid suffix. 1317 * 1318 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1319 * and will cause make to do a new chdir to that path. 1320 */ 1321 while (*cp && !isspace ((unsigned char)*cp)) { 1322 cp++; 1323 } 1324 savec = *cp; 1325 *cp = '\0'; 1326 switch (specType) { 1327 case Suffixes: 1328 Suff_AddSuffix (line, &mainNode); 1329 break; 1330 case ExPath: 1331 Lst_ForEach(paths, ParseAddDir, (ClientData)line); 1332 break; 1333 case Includes: 1334 Suff_AddInclude (line); 1335 break; 1336 case Libs: 1337 Suff_AddLib (line); 1338 break; 1339 case Null: 1340 Suff_SetNull (line); 1341 break; 1342 case ExObjdir: 1343 Main_SetObjdir(line); 1344 break; 1345 default: 1346 break; 1347 } 1348 *cp = savec; 1349 if (savec != '\0') { 1350 cp++; 1351 } 1352 while (*cp && isspace ((unsigned char)*cp)) { 1353 cp++; 1354 } 1355 line = cp; 1356 } 1357 if (paths) { 1358 Lst_Destroy(paths, NOFREE); 1359 } 1360 if (specType == ExPath) 1361 Dir_SetPATH(); 1362 } else { 1363 /* 1364 * We don't need ParseDoSpecialSrc unless .WAIT is present. 1365 */ 1366 hasWait = (strstr(line, ".WAIT") != NULL); 1367 1368 while (*line) { 1369 /* 1370 * The targets take real sources, so we must beware of archive 1371 * specifications (i.e. things with left parentheses in them) 1372 * and handle them accordingly. 1373 */ 1374 while (*cp && !isspace ((unsigned char)*cp)) { 1375 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1376 /* 1377 * Only stop for a left parenthesis if it isn't at the 1378 * start of a word (that'll be for variable changes 1379 * later) and isn't preceded by a dollar sign (a dynamic 1380 * source). 1381 */ 1382 break; 1383 } else { 1384 cp++; 1385 } 1386 } 1387 1388 if (*cp == LPAREN) { 1389 sources = Lst_Init (FALSE); 1390 if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) { 1391 Parse_Error (PARSE_FATAL, 1392 "Error in source archive spec \"%s\"", line); 1393 return; 1394 } 1395 1396 while (!Lst_IsEmpty (sources)) { 1397 gn = (GNode *) Lst_DeQueue (sources); 1398 ParseDoSrc (tOp, gn->name, curSrcs, hasWait); 1399 } 1400 Lst_Destroy (sources, NOFREE); 1401 cp = line; 1402 } else { 1403 if (*cp) { 1404 *cp = '\0'; 1405 cp += 1; 1406 } 1407 1408 ParseDoSrc (tOp, line, curSrcs, hasWait); 1409 } 1410 while (*cp && isspace ((unsigned char)*cp)) { 1411 cp++; 1412 } 1413 line = cp; 1414 } 1415 } 1416 1417 if (mainNode == NILGNODE) { 1418 /* 1419 * If we have yet to decide on a main target to make, in the 1420 * absence of any user input, we want the first target on 1421 * the first dependency line that is actually a real target 1422 * (i.e. isn't a .USE or .EXEC rule) to be made. 1423 */ 1424 Lst_ForEach (targets, ParseFindMain, (ClientData)0); 1425 } 1426 1427 /* 1428 * Finally, destroy the list of sources 1429 */ 1430 Lst_Destroy(curSrcs, NOFREE); 1431 } 1432 1433 /*- 1434 *--------------------------------------------------------------------- 1435 * Parse_IsVar -- 1436 * Return TRUE if the passed line is a variable assignment. A variable 1437 * assignment consists of a single word followed by optional whitespace 1438 * followed by either a += or an = operator. 1439 * This function is used both by the Parse_File function and main when 1440 * parsing the command-line arguments. 1441 * 1442 * Input: 1443 * line the line to check 1444 * 1445 * Results: 1446 * TRUE if it is. FALSE if it ain't 1447 * 1448 * Side Effects: 1449 * none 1450 *--------------------------------------------------------------------- 1451 */ 1452 Boolean 1453 Parse_IsVar(char *line) 1454 { 1455 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1456 Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1457 int level = 0; 1458 #define ISEQOPERATOR(c) \ 1459 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1460 1461 /* 1462 * Skip to variable name 1463 */ 1464 for (;(*line == ' ') || (*line == '\t'); line++) 1465 continue; 1466 1467 for (; *line != '=' || level != 0; line++) 1468 switch (*line) { 1469 case '\0': 1470 /* 1471 * end-of-line -- can't be a variable assignment. 1472 */ 1473 return FALSE; 1474 1475 case ' ': 1476 case '\t': 1477 /* 1478 * there can be as much white space as desired so long as there is 1479 * only one word before the operator 1480 */ 1481 wasSpace = TRUE; 1482 break; 1483 1484 case LPAREN: 1485 case '{': 1486 level++; 1487 break; 1488 1489 case '}': 1490 case RPAREN: 1491 level--; 1492 break; 1493 1494 default: 1495 if (wasSpace && haveName) { 1496 if (ISEQOPERATOR(*line)) { 1497 /* 1498 * We must have a finished word 1499 */ 1500 if (level != 0) 1501 return FALSE; 1502 1503 /* 1504 * When an = operator [+?!:] is found, the next 1505 * character must be an = or it ain't a valid 1506 * assignment. 1507 */ 1508 if (line[1] == '=') 1509 return haveName; 1510 #ifdef SUNSHCMD 1511 /* 1512 * This is a shell command 1513 */ 1514 if (strncmp(line, ":sh", 3) == 0) 1515 return haveName; 1516 #endif 1517 } 1518 /* 1519 * This is the start of another word, so not assignment. 1520 */ 1521 return FALSE; 1522 } 1523 else { 1524 haveName = TRUE; 1525 wasSpace = FALSE; 1526 } 1527 break; 1528 } 1529 1530 return haveName; 1531 } 1532 1533 /*- 1534 *--------------------------------------------------------------------- 1535 * Parse_DoVar -- 1536 * Take the variable assignment in the passed line and do it in the 1537 * global context. 1538 * 1539 * Note: There is a lexical ambiguity with assignment modifier characters 1540 * in variable names. This routine interprets the character before the = 1541 * as a modifier. Therefore, an assignment like 1542 * C++=/usr/bin/CC 1543 * is interpreted as "C+ +=" instead of "C++ =". 1544 * 1545 * Input: 1546 * line a line guaranteed to be a variable assignment. 1547 * This reduces error checks 1548 * ctxt Context in which to do the assignment 1549 * 1550 * Results: 1551 * none 1552 * 1553 * Side Effects: 1554 * the variable structure of the given variable name is altered in the 1555 * global context. 1556 *--------------------------------------------------------------------- 1557 */ 1558 void 1559 Parse_DoVar(char *line, GNode *ctxt) 1560 { 1561 char *cp; /* pointer into line */ 1562 enum { 1563 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1564 } type; /* Type of assignment */ 1565 char *opc; /* ptr to operator character to 1566 * null-terminate the variable name */ 1567 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1568 * i.e. if any variable expansion was 1569 * performed */ 1570 /* 1571 * Avoid clobbered variable warnings by forcing the compiler 1572 * to ``unregister'' variables 1573 */ 1574 #if __GNUC__ 1575 (void) &cp; 1576 (void) &line; 1577 #endif 1578 1579 /* 1580 * Skip to variable name 1581 */ 1582 while ((*line == ' ') || (*line == '\t')) { 1583 line++; 1584 } 1585 1586 /* 1587 * Skip to operator character, nulling out whitespace as we go 1588 */ 1589 for (cp = line + 1; *cp != '='; cp++) { 1590 if (isspace ((unsigned char)*cp)) { 1591 *cp = '\0'; 1592 } 1593 } 1594 opc = cp-1; /* operator is the previous character */ 1595 *cp++ = '\0'; /* nuke the = */ 1596 1597 /* 1598 * Check operator type 1599 */ 1600 switch (*opc) { 1601 case '+': 1602 type = VAR_APPEND; 1603 *opc = '\0'; 1604 break; 1605 1606 case '?': 1607 /* 1608 * If the variable already has a value, we don't do anything. 1609 */ 1610 *opc = '\0'; 1611 if (Var_Exists(line, ctxt)) { 1612 return; 1613 } else { 1614 type = VAR_NORMAL; 1615 } 1616 break; 1617 1618 case ':': 1619 type = VAR_SUBST; 1620 *opc = '\0'; 1621 break; 1622 1623 case '!': 1624 type = VAR_SHELL; 1625 *opc = '\0'; 1626 break; 1627 1628 default: 1629 #ifdef SUNSHCMD 1630 while (opc > line && *opc != ':') 1631 opc--; 1632 1633 if (strncmp(opc, ":sh", 3) == 0) { 1634 type = VAR_SHELL; 1635 *opc = '\0'; 1636 break; 1637 } 1638 #endif 1639 type = VAR_NORMAL; 1640 break; 1641 } 1642 1643 while (isspace ((unsigned char)*cp)) { 1644 cp++; 1645 } 1646 1647 if (type == VAR_APPEND) { 1648 Var_Append (line, cp, ctxt); 1649 } else if (type == VAR_SUBST) { 1650 /* 1651 * Allow variables in the old value to be undefined, but leave their 1652 * invocation alone -- this is done by forcing oldVars to be false. 1653 * XXX: This can cause recursive variables, but that's not hard to do, 1654 * and this allows someone to do something like 1655 * 1656 * CFLAGS = $(.INCLUDES) 1657 * CFLAGS := -I.. $(CFLAGS) 1658 * 1659 * And not get an error. 1660 */ 1661 Boolean oldOldVars = oldVars; 1662 1663 oldVars = FALSE; 1664 1665 /* 1666 * make sure that we set the variable the first time to nothing 1667 * so that it gets substituted! 1668 */ 1669 if (!Var_Exists(line, ctxt)) 1670 Var_Set(line, "", ctxt, 0); 1671 1672 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1673 oldVars = oldOldVars; 1674 freeCp = TRUE; 1675 1676 Var_Set(line, cp, ctxt, 0); 1677 } else if (type == VAR_SHELL) { 1678 char *res; 1679 const char *err; 1680 1681 if (strchr(cp, '$') != NULL) { 1682 /* 1683 * There's a dollar sign in the command, so perform variable 1684 * expansion on the whole thing. The resulting string will need 1685 * freeing when we're done, so set freeCmd to TRUE. 1686 */ 1687 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1688 freeCp = TRUE; 1689 } 1690 1691 res = Cmd_Exec(cp, &err); 1692 Var_Set(line, res, ctxt, 0); 1693 free(res); 1694 1695 if (err) 1696 Parse_Error(PARSE_WARNING, err, cp); 1697 } else { 1698 /* 1699 * Normal assignment -- just do it. 1700 */ 1701 Var_Set(line, cp, ctxt, 0); 1702 } 1703 if (strcmp(line, MAKEOVERRIDES) == 0) 1704 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1705 else if (strcmp(line, ".CURDIR") == 0) { 1706 /* 1707 * Somone is being (too?) clever... 1708 * Let's pretend they know what they are doing and 1709 * re-initialize the 'cur' Path. 1710 */ 1711 Dir_InitCur(cp); 1712 Dir_SetPATH(); 1713 } 1714 if (freeCp) 1715 free(cp); 1716 } 1717 1718 1719 /*- 1720 * ParseAddCmd -- 1721 * Lst_ForEach function to add a command line to all targets 1722 * 1723 * Input: 1724 * gnp the node to which the command is to be added 1725 * cmd the command to add 1726 * 1727 * Results: 1728 * Always 0 1729 * 1730 * Side Effects: 1731 * A new element is added to the commands list of the node. 1732 */ 1733 static int 1734 ParseAddCmd(ClientData gnp, ClientData cmd) 1735 { 1736 GNode *gn = (GNode *) gnp; 1737 /* if target already supplied, ignore commands */ 1738 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1739 gn = (GNode *) Lst_Datum (Lst_Last (gn->cohorts)); 1740 if (!(gn->type & OP_HAS_COMMANDS)) { 1741 (void)Lst_AtEnd(gn->commands, cmd); 1742 ParseMark(gn); 1743 } else { 1744 #ifdef notyet 1745 /* XXX: We cannot do this until we fix the tree */ 1746 (void)Lst_AtEnd(gn->commands, cmd); 1747 Parse_Error (PARSE_WARNING, 1748 "overriding commands for target \"%s\"; " 1749 "previous commands defined at %s: %d ignored", 1750 gn->name, gn->fname, gn->lineno); 1751 #else 1752 Parse_Error (PARSE_WARNING, 1753 "duplicate script for target \"%s\" ignored", 1754 gn->name); 1755 ParseErrorInternal (gn->fname, gn->lineno, PARSE_WARNING, 1756 "using previous script for \"%s\" defined here", 1757 gn->name); 1758 #endif 1759 } 1760 return(0); 1761 } 1762 1763 /*- 1764 *----------------------------------------------------------------------- 1765 * ParseHasCommands -- 1766 * Callback procedure for Parse_File when destroying the list of 1767 * targets on the last dependency line. Marks a target as already 1768 * having commands if it does, to keep from having shell commands 1769 * on multiple dependency lines. 1770 * 1771 * Input: 1772 * gnp Node to examine 1773 * 1774 * Results: 1775 * None 1776 * 1777 * Side Effects: 1778 * OP_HAS_COMMANDS may be set for the target. 1779 * 1780 *----------------------------------------------------------------------- 1781 */ 1782 static void 1783 ParseHasCommands(ClientData gnp) 1784 { 1785 GNode *gn = (GNode *) gnp; 1786 if (!Lst_IsEmpty(gn->commands)) { 1787 gn->type |= OP_HAS_COMMANDS; 1788 } 1789 } 1790 1791 /*- 1792 *----------------------------------------------------------------------- 1793 * Parse_AddIncludeDir -- 1794 * Add a directory to the path searched for included makefiles 1795 * bracketed by double-quotes. Used by functions in main.c 1796 * 1797 * Input: 1798 * dir The name of the directory to add 1799 * 1800 * Results: 1801 * None. 1802 * 1803 * Side Effects: 1804 * The directory is appended to the list. 1805 * 1806 *----------------------------------------------------------------------- 1807 */ 1808 void 1809 Parse_AddIncludeDir(char *dir) 1810 { 1811 (void) Dir_AddDir (parseIncPath, dir); 1812 } 1813 1814 /*- 1815 *--------------------------------------------------------------------- 1816 * ParseDoInclude -- 1817 * Push to another file. 1818 * 1819 * The input is the line minus the `.'. A file spec is a string 1820 * enclosed in <> or "". The former is looked for only in sysIncPath. 1821 * The latter in . and the directories specified by -I command line 1822 * options 1823 * 1824 * Results: 1825 * None 1826 * 1827 * Side Effects: 1828 * A structure is added to the includes Lst and readProc, lineno, 1829 * fname and curFILE are altered for the new file 1830 *--------------------------------------------------------------------- 1831 */ 1832 static void 1833 ParseDoInclude(char *line) 1834 { 1835 char *fullname; /* full pathname of file */ 1836 IFile *oldFile; /* state associated with current file */ 1837 char endc; /* the character which ends the file spec */ 1838 char *cp; /* current position in file spec */ 1839 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1840 int silent = (*line != 'i') ? 1 : 0; 1841 char *file = &line[7 + silent]; 1842 1843 /* 1844 * Skip to delimiter character so we know where to look 1845 */ 1846 while ((*file == ' ') || (*file == '\t')) { 1847 file++; 1848 } 1849 1850 if ((*file != '"') && (*file != '<')) { 1851 Parse_Error (PARSE_FATAL, 1852 ".include filename must be delimited by '\"' or '<'"); 1853 return; 1854 } 1855 1856 /* 1857 * Set the search path on which to find the include file based on the 1858 * characters which bracket its name. Angle-brackets imply it's 1859 * a system Makefile while double-quotes imply it's a user makefile 1860 */ 1861 if (*file == '<') { 1862 isSystem = TRUE; 1863 endc = '>'; 1864 } else { 1865 isSystem = FALSE; 1866 endc = '"'; 1867 } 1868 1869 /* 1870 * Skip to matching delimiter 1871 */ 1872 for (cp = ++file; *cp && *cp != endc; cp++) { 1873 continue; 1874 } 1875 1876 if (*cp != endc) { 1877 Parse_Error (PARSE_FATAL, 1878 "Unclosed %cinclude filename. '%c' expected", 1879 '.', endc); 1880 return; 1881 } 1882 *cp = '\0'; 1883 1884 /* 1885 * Substitute for any variables in the file name before trying to 1886 * find the thing. 1887 */ 1888 file = Var_Subst (NULL, file, VAR_CMD, FALSE); 1889 1890 /* 1891 * Now we know the file's name and its search path, we attempt to 1892 * find the durn thing. A return of NULL indicates the file don't 1893 * exist. 1894 */ 1895 fullname = (char *)NULL; 1896 1897 if (!isSystem) { 1898 /* 1899 * Include files contained in double-quotes are first searched for 1900 * relative to the including file's location. We don't want to 1901 * cd there, of course, so we just tack on the old file's 1902 * leading path components and call Dir_FindFile to see if 1903 * we can locate the beast. 1904 */ 1905 char *prefEnd, *Fname; 1906 1907 /* Make a temporary copy of this, to be safe. */ 1908 Fname = estrdup(curFile.fname); 1909 1910 prefEnd = strrchr (Fname, '/'); 1911 if (prefEnd != (char *)NULL) { 1912 char *newName; 1913 1914 *prefEnd = '\0'; 1915 if (file[0] == '/') 1916 newName = estrdup(file); 1917 else 1918 newName = str_concat (Fname, file, STR_ADDSLASH); 1919 fullname = Dir_FindFile (newName, parseIncPath); 1920 if (fullname == (char *)NULL) { 1921 fullname = Dir_FindFile(newName, dirSearchPath); 1922 } 1923 free (newName); 1924 *prefEnd = '/'; 1925 } else { 1926 fullname = (char *)NULL; 1927 } 1928 free (Fname); 1929 if (fullname == (char *)NULL) { 1930 /* 1931 * Makefile wasn't found in same directory as included makefile. 1932 * Search for it first on the -I search path, 1933 * then on the .PATH search path, if not found in a -I directory. 1934 * XXX: Suffix specific? 1935 */ 1936 fullname = Dir_FindFile (file, parseIncPath); 1937 if (fullname == (char *)NULL) { 1938 fullname = Dir_FindFile(file, dirSearchPath); 1939 } 1940 } 1941 } 1942 1943 /* Looking for a system file or file still not found */ 1944 if (fullname == (char *)NULL) { 1945 /* 1946 * Look for it on the system path 1947 */ 1948 fullname = Dir_FindFile(file, Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1949 } 1950 1951 if (fullname == (char *) NULL) { 1952 *cp = endc; 1953 if (!silent) 1954 Parse_Error (PARSE_FATAL, "Could not find %s", file); 1955 return; 1956 } 1957 1958 free(file); 1959 1960 /* 1961 * Once we find the absolute path to the file, we get to save all the 1962 * state from the current file before we can start reading this 1963 * include file. The state is stored in an IFile structure which 1964 * is placed on a list with other IFile structures. The list makes 1965 * a very nice stack to track how we got here... 1966 */ 1967 oldFile = (IFile *) emalloc (sizeof (IFile)); 1968 1969 memcpy(oldFile, &curFile, sizeof (IFile)); 1970 1971 (void) Lst_AtFront (includes, (ClientData)oldFile); 1972 1973 /* 1974 * Once the previous state has been saved, we can get down to reading 1975 * the new file. We set up the name of the file to be the absolute 1976 * name of the include file so error messages refer to the right 1977 * place. Naturally enough, we start reading at line number 0. 1978 */ 1979 curFile.fname = fullname; 1980 curFile.lineno = 0; 1981 1982 ParseSetParseFile(curFile.fname); 1983 1984 curFile.F = fopen (fullname, "r"); 1985 curFile.P = NULL; 1986 1987 if (curFile.F == (FILE * ) NULL) { 1988 if (!silent) 1989 Parse_Error (PARSE_FATAL, "Cannot open %s", fullname); 1990 /* 1991 * Pop to previous file 1992 */ 1993 (void) ParseEOF(0); 1994 } 1995 } 1996 1997 1998 /*- 1999 *--------------------------------------------------------------------- 2000 * ParseSetParseFile -- 2001 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2002 * basename of the given filename 2003 * 2004 * Results: 2005 * None 2006 * 2007 * Side Effects: 2008 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2009 * dirname and basename of the given filename. 2010 *--------------------------------------------------------------------- 2011 */ 2012 static void 2013 ParseSetParseFile(char *filename) 2014 { 2015 char *slash; 2016 2017 slash = strrchr(filename, '/'); 2018 if (slash == 0) { 2019 Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0); 2020 Var_Set(".PARSEFILE", filename, VAR_GLOBAL, 0); 2021 } else { 2022 *slash = '\0'; 2023 Var_Set(".PARSEDIR", filename, VAR_GLOBAL, 0); 2024 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0); 2025 *slash = '/'; 2026 } 2027 } 2028 2029 2030 /*- 2031 *--------------------------------------------------------------------- 2032 * Parse_FromString -- 2033 * Start Parsing from the given string 2034 * 2035 * Results: 2036 * None 2037 * 2038 * Side Effects: 2039 * A structure is added to the includes Lst and readProc, lineno, 2040 * fname and curFILE are altered for the new file 2041 *--------------------------------------------------------------------- 2042 */ 2043 void 2044 Parse_FromString(char *str) 2045 { 2046 IFile *oldFile; /* state associated with this file */ 2047 2048 if (DEBUG(FOR)) 2049 (void) fprintf(stderr, "%s\n----\n", str); 2050 2051 oldFile = (IFile *) emalloc (sizeof (IFile)); 2052 memcpy(oldFile, &curFile, sizeof (IFile)); 2053 2054 (void) Lst_AtFront (includes, (ClientData)oldFile); 2055 2056 curFile.F = NULL; 2057 curFile.P = (PTR *) emalloc (sizeof (PTR)); 2058 curFile.P->str = curFile.P->ptr = str; 2059 curFile.lineno = 0; 2060 curFile.fname = estrdup(curFile.fname); 2061 } 2062 2063 2064 #ifdef SYSVINCLUDE 2065 /*- 2066 *--------------------------------------------------------------------- 2067 * ParseTraditionalInclude -- 2068 * Push to another file. 2069 * 2070 * The input is the current line. The file name(s) are 2071 * following the "include". 2072 * 2073 * Results: 2074 * None 2075 * 2076 * Side Effects: 2077 * A structure is added to the includes Lst and readProc, lineno, 2078 * fname and curFILE are altered for the new file 2079 *--------------------------------------------------------------------- 2080 */ 2081 static void 2082 ParseTraditionalInclude(char *line) 2083 { 2084 char *fullname; /* full pathname of file */ 2085 IFile *oldFile; /* state associated with current file */ 2086 char *cp; /* current position in file spec */ 2087 char *prefEnd; 2088 int done = 0; 2089 int silent = (line[0] != 'i') ? 1 : 0; 2090 char *file = &line[silent + 7]; 2091 char *cfname; 2092 size_t clineno; 2093 2094 cfname = curFile.fname; 2095 clineno = curFile.lineno; 2096 2097 /* 2098 * Skip over whitespace 2099 */ 2100 while (isspace((unsigned char)*file)) 2101 file++; 2102 2103 if (*file == '\0') { 2104 Parse_Error (PARSE_FATAL, 2105 "Filename missing from \"include\""); 2106 return; 2107 } 2108 2109 for (; !done; file = cp + 1) { 2110 /* 2111 * Skip to end of line or next whitespace 2112 */ 2113 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2114 continue; 2115 2116 if (*cp) 2117 *cp = '\0'; 2118 else 2119 done = 1; 2120 2121 /* 2122 * Substitute for any variables in the file name before trying to 2123 * find the thing. 2124 */ 2125 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 2126 2127 /* 2128 * Now we know the file's name, we attempt to find the durn thing. 2129 * A return of NULL indicates the file don't exist. 2130 * 2131 * Include files are first searched for relative to the including 2132 * file's location. We don't want to cd there, of course, so we 2133 * just tack on the old file's leading path components and call 2134 * Dir_FindFile to see if we can locate the beast. 2135 * XXX - this *does* search in the current directory, right? 2136 */ 2137 2138 prefEnd = strrchr(cfname, '/'); 2139 if (prefEnd != NULL) { 2140 char *newName; 2141 2142 *prefEnd = '\0'; 2143 newName = str_concat(cfname, file, STR_ADDSLASH); 2144 fullname = Dir_FindFile(newName, parseIncPath); 2145 if (fullname == NULL) { 2146 fullname = Dir_FindFile(newName, dirSearchPath); 2147 } 2148 free (newName); 2149 *prefEnd = '/'; 2150 } else { 2151 fullname = NULL; 2152 } 2153 2154 if (fullname == NULL) { 2155 /* 2156 * System makefile or makefile wasn't found in same directory as 2157 * included makefile. Search for it first on the -I search path, 2158 * then on the .PATH search path, if not found in a 2159 * -I directory. XXX: Suffix specific? 2160 */ 2161 fullname = Dir_FindFile(file, parseIncPath); 2162 if (fullname == NULL) { 2163 fullname = Dir_FindFile(file, dirSearchPath); 2164 } 2165 } 2166 2167 if (fullname == NULL) { 2168 /* 2169 * Still haven't found the makefile. Look for it on the system 2170 * path as a last resort. 2171 */ 2172 fullname = Dir_FindFile(file, 2173 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2174 } 2175 2176 if (fullname == NULL) { 2177 if (!silent) 2178 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2179 "Could not find %s", file); 2180 free(file); 2181 continue; 2182 } 2183 2184 free(file); 2185 2186 /* 2187 * Once we find the absolute path to the file, we get to save all 2188 * the state from the current file before we can start reading this 2189 * include file. The state is stored in an IFile structure which 2190 * is placed on a list with other IFile structures. The list makes 2191 * a very nice stack to track how we got here... 2192 */ 2193 oldFile = (IFile *) emalloc(sizeof(IFile)); 2194 memcpy(oldFile, &curFile, sizeof (IFile)); 2195 2196 (void) Lst_AtFront(includes, (ClientData)oldFile); 2197 2198 /* 2199 * Once the previous state has been saved, we can get down to 2200 * reading the new file. We set up the name of the file to be the 2201 * absolute name of the include file so error messages refer to the 2202 * right place. Naturally enough, we start reading at line number 0. 2203 */ 2204 curFile.fname = fullname; 2205 curFile.lineno = 0; 2206 2207 curFile.F = fopen(fullname, "r"); 2208 curFile.P = NULL; 2209 2210 if (curFile.F == NULL) { 2211 if (!silent) 2212 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2213 "Cannot open %s", fullname); 2214 /* 2215 * Pop to previous file 2216 */ 2217 (void) ParseEOF(1); 2218 } 2219 } 2220 } 2221 #endif 2222 2223 /*- 2224 *--------------------------------------------------------------------- 2225 * ParseEOF -- 2226 * Called when EOF is reached in the current file. If we were reading 2227 * an include file, the includes stack is popped and things set up 2228 * to go back to reading the previous file at the previous location. 2229 * 2230 * Results: 2231 * CONTINUE if there's more to do. DONE if not. 2232 * 2233 * Side Effects: 2234 * The old curFILE, is closed. The includes list is shortened. 2235 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2236 *--------------------------------------------------------------------- 2237 */ 2238 static int 2239 ParseEOF(int opened) 2240 { 2241 IFile *ifile; /* the state on the top of the includes stack */ 2242 2243 if (Lst_IsEmpty (includes)) { 2244 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2245 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2246 return (DONE); 2247 } 2248 2249 ifile = (IFile *) Lst_DeQueue (includes); 2250 2251 /* XXX dispose of curFile info */ 2252 free ((Address) curFile.fname); 2253 if (opened && curFile.F) 2254 (void) fclose (curFile.F); 2255 if (curFile.P) { 2256 free((Address) curFile.P->str); 2257 free((Address) curFile.P); 2258 } 2259 2260 memcpy(&curFile, ifile, sizeof (IFile)); 2261 2262 free ((Address)ifile); 2263 2264 /* pop the PARSEDIR/PARSEFILE variables */ 2265 ParseSetParseFile(curFile.fname); 2266 return (CONTINUE); 2267 } 2268 2269 /*- 2270 *--------------------------------------------------------------------- 2271 * ParseReadc -- 2272 * Read a character from the current file 2273 * 2274 * Results: 2275 * The character that was read 2276 * 2277 * Side Effects: 2278 *--------------------------------------------------------------------- 2279 */ 2280 static __inline int 2281 ParseReadc(void) 2282 { 2283 if (curFile.F) 2284 return fgetc(curFile.F); 2285 2286 if (curFile.P && *curFile.P->ptr) 2287 return *curFile.P->ptr++; 2288 return EOF; 2289 } 2290 2291 2292 /*- 2293 *--------------------------------------------------------------------- 2294 * ParseUnreadc -- 2295 * Put back a character to the current file 2296 * 2297 * Results: 2298 * None. 2299 * 2300 * Side Effects: 2301 *--------------------------------------------------------------------- 2302 */ 2303 static void 2304 ParseUnreadc(int c) 2305 { 2306 if (curFile.F) { 2307 ungetc(c, curFile.F); 2308 return; 2309 } 2310 if (curFile.P) { 2311 *--(curFile.P->ptr) = c; 2312 return; 2313 } 2314 } 2315 2316 2317 /* ParseSkipLine(): 2318 * Grab the next line 2319 * 2320 * Input: 2321 * skip Skip lines that don't start with . 2322 * 2323 */ 2324 static char * 2325 ParseSkipLine(int skip) 2326 { 2327 char *line; 2328 int c, lastc, lineLength = 0; 2329 Buffer buf; 2330 2331 buf = Buf_Init(MAKE_BSIZE); 2332 2333 do { 2334 Buf_Discard(buf, lineLength); 2335 lastc = '\0'; 2336 2337 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2338 && c != EOF) { 2339 if (c == '\n') { 2340 Buf_ReplaceLastByte(buf, (Byte)' '); 2341 curFile.lineno++; 2342 2343 while ((c = ParseReadc()) == ' ' || c == '\t'); 2344 2345 if (c == EOF) 2346 break; 2347 } 2348 2349 Buf_AddByte(buf, (Byte)c); 2350 lastc = c; 2351 } 2352 2353 if (c == EOF) { 2354 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2355 Buf_Destroy(buf, TRUE); 2356 return((char *)NULL); 2357 } 2358 2359 curFile.lineno++; 2360 Buf_AddByte(buf, (Byte)'\0'); 2361 line = (char *)Buf_GetAll(buf, &lineLength); 2362 } while (skip == 1 && line[0] != '.'); 2363 2364 Buf_Destroy(buf, FALSE); 2365 return line; 2366 } 2367 2368 2369 /*- 2370 *--------------------------------------------------------------------- 2371 * ParseReadLine -- 2372 * Read an entire line from the input file. Called only by Parse_File. 2373 * To facilitate escaped newlines and what have you, a character is 2374 * buffered in 'lastc', which is '\0' when no characters have been 2375 * read. When we break out of the loop, c holds the terminating 2376 * character and lastc holds a character that should be added to 2377 * the line (unless we don't read anything but a terminator). 2378 * 2379 * Results: 2380 * A line w/o its newline 2381 * 2382 * Side Effects: 2383 * Only those associated with reading a character 2384 *--------------------------------------------------------------------- 2385 */ 2386 static char * 2387 ParseReadLine(void) 2388 { 2389 Buffer buf; /* Buffer for current line */ 2390 int c; /* the current character */ 2391 int lastc; /* The most-recent character */ 2392 Boolean semiNL; /* treat semi-colons as newlines */ 2393 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2394 * for the purposes of setting semiNL */ 2395 Boolean ignComment; /* TRUE if should ignore comments (in a 2396 * shell command */ 2397 char *line; /* Result */ 2398 char *ep; /* to strip trailing blanks */ 2399 int lineLength; /* Length of result */ 2400 2401 semiNL = FALSE; 2402 ignDepOp = FALSE; 2403 ignComment = FALSE; 2404 2405 /* 2406 * Handle special-characters at the beginning of the line. Either a 2407 * leading tab (shell command) or pound-sign (possible conditional) 2408 * forces us to ignore comments and dependency operators and treat 2409 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2410 * discards completely blank lines. 2411 */ 2412 for (;;) { 2413 c = ParseReadc(); 2414 2415 if (c == '\t') { 2416 ignComment = ignDepOp = TRUE; 2417 break; 2418 } else if (c == '\n') { 2419 curFile.lineno++; 2420 } else if (c == '#') { 2421 ParseUnreadc(c); 2422 break; 2423 } else { 2424 /* 2425 * Anything else breaks out without doing anything 2426 */ 2427 break; 2428 } 2429 } 2430 2431 if (c != EOF) { 2432 lastc = c; 2433 buf = Buf_Init(MAKE_BSIZE); 2434 2435 while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) && 2436 (c != EOF)) 2437 { 2438 test_char: 2439 switch(c) { 2440 case '\n': 2441 /* 2442 * Escaped newline: read characters until a non-space or an 2443 * unescaped newline and replace them all by a single space. 2444 * This is done by storing the space over the backslash and 2445 * dropping through with the next nonspace. If it is a 2446 * semi-colon and semiNL is TRUE, it will be recognized as a 2447 * newline in the code below this... 2448 */ 2449 curFile.lineno++; 2450 lastc = ' '; 2451 while ((c = ParseReadc ()) == ' ' || c == '\t') { 2452 continue; 2453 } 2454 if (c == EOF || c == '\n') { 2455 goto line_read; 2456 } else { 2457 /* 2458 * Check for comments, semiNL's, etc. -- easier than 2459 * ParseUnreadc(c); continue; 2460 */ 2461 goto test_char; 2462 } 2463 /*NOTREACHED*/ 2464 break; 2465 2466 case ';': 2467 /* 2468 * Semi-colon: Need to see if it should be interpreted as a 2469 * newline 2470 */ 2471 if (semiNL) { 2472 /* 2473 * To make sure the command that may be following this 2474 * semi-colon begins with a tab, we push one back into the 2475 * input stream. This will overwrite the semi-colon in the 2476 * buffer. If there is no command following, this does no 2477 * harm, since the newline remains in the buffer and the 2478 * whole line is ignored. 2479 */ 2480 ParseUnreadc('\t'); 2481 goto line_read; 2482 } 2483 break; 2484 case '=': 2485 if (!semiNL) { 2486 /* 2487 * Haven't seen a dependency operator before this, so this 2488 * must be a variable assignment -- don't pay attention to 2489 * dependency operators after this. 2490 */ 2491 ignDepOp = TRUE; 2492 } else if (lastc == ':' || lastc == '!') { 2493 /* 2494 * Well, we've seen a dependency operator already, but it 2495 * was the previous character, so this is really just an 2496 * expanded variable assignment. Revert semi-colons to 2497 * being just semi-colons again and ignore any more 2498 * dependency operators. 2499 * 2500 * XXX: Note that a line like "foo : a:=b" will blow up, 2501 * but who'd write a line like that anyway? 2502 */ 2503 ignDepOp = TRUE; semiNL = FALSE; 2504 } 2505 break; 2506 case '#': 2507 if (!ignComment) { 2508 if ( 2509 #if 0 2510 compatMake && 2511 #endif 2512 (lastc != '\\')) { 2513 /* 2514 * If the character is a hash mark and it isn't escaped 2515 * (or we're being compatible), the thing is a comment. 2516 * Skip to the end of the line. 2517 */ 2518 do { 2519 c = ParseReadc(); 2520 } while ((c != '\n') && (c != EOF)); 2521 goto line_read; 2522 } else { 2523 /* 2524 * Don't add the backslash. Just let the # get copied 2525 * over. 2526 */ 2527 lastc = c; 2528 continue; 2529 } 2530 } 2531 break; 2532 case ':': 2533 case '!': 2534 if (!ignDepOp && (c == ':' || c == '!')) { 2535 /* 2536 * A semi-colon is recognized as a newline only on 2537 * dependency lines. Dependency lines are lines with a 2538 * colon or an exclamation point. Ergo... 2539 */ 2540 semiNL = TRUE; 2541 } 2542 break; 2543 } 2544 /* 2545 * Copy in the previous character and save this one in lastc. 2546 */ 2547 Buf_AddByte (buf, (Byte)lastc); 2548 lastc = c; 2549 2550 } 2551 line_read: 2552 curFile.lineno++; 2553 2554 if (lastc != '\0') { 2555 Buf_AddByte (buf, (Byte)lastc); 2556 } 2557 Buf_AddByte (buf, (Byte)'\0'); 2558 line = (char *)Buf_GetAll (buf, &lineLength); 2559 Buf_Destroy (buf, FALSE); 2560 2561 /* 2562 * Strip trailing blanks and tabs from the line. 2563 * Do not strip a blank or tab that is preceded by 2564 * a '\' 2565 */ 2566 ep = line; 2567 while (*ep) 2568 ++ep; 2569 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2570 if (ep > line + 1 && ep[-2] == '\\') 2571 break; 2572 --ep; 2573 } 2574 *ep = 0; 2575 2576 if (line[0] == '.') { 2577 /* 2578 * The line might be a conditional. Ask the conditional module 2579 * about it and act accordingly 2580 */ 2581 switch (Cond_Eval (line)) { 2582 case COND_SKIP: 2583 /* 2584 * Skip to next conditional that evaluates to COND_PARSE. 2585 */ 2586 do { 2587 free (line); 2588 line = ParseSkipLine(1); 2589 } while (line && Cond_Eval(line) != COND_PARSE); 2590 if (line == NULL) 2591 break; 2592 /*FALLTHRU*/ 2593 case COND_PARSE: 2594 free ((Address) line); 2595 line = ParseReadLine(); 2596 break; 2597 case COND_INVALID: 2598 if (For_Eval(line)) { 2599 int ok; 2600 free(line); 2601 do { 2602 /* 2603 * Skip after the matching end 2604 */ 2605 line = ParseSkipLine(0); 2606 if (line == NULL) { 2607 Parse_Error (PARSE_FATAL, 2608 "Unexpected end of file in for loop.\n"); 2609 break; 2610 } 2611 ok = For_Eval(line); 2612 free(line); 2613 } 2614 while (ok); 2615 if (line != NULL) 2616 For_Run(); 2617 line = ParseReadLine(); 2618 } 2619 break; 2620 } 2621 } 2622 return (line); 2623 2624 } else { 2625 /* 2626 * Hit end-of-file, so return a NULL line to indicate this. 2627 */ 2628 return((char *)NULL); 2629 } 2630 } 2631 2632 /*- 2633 *----------------------------------------------------------------------- 2634 * ParseFinishLine -- 2635 * Handle the end of a dependency group. 2636 * 2637 * Results: 2638 * Nothing. 2639 * 2640 * Side Effects: 2641 * inLine set FALSE. 'targets' list destroyed. 2642 * 2643 *----------------------------------------------------------------------- 2644 */ 2645 static void 2646 ParseFinishLine(void) 2647 { 2648 if (inLine) { 2649 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2650 Lst_Destroy (targets, ParseHasCommands); 2651 targets = NULL; 2652 inLine = FALSE; 2653 } 2654 } 2655 2656 2657 /*- 2658 *--------------------------------------------------------------------- 2659 * Parse_File -- 2660 * Parse a file into its component parts, incorporating it into the 2661 * current dependency graph. This is the main function and controls 2662 * almost every other function in this module 2663 * 2664 * Input: 2665 * name the name of the file being read 2666 * stream Stream open to makefile to parse 2667 * 2668 * Results: 2669 * None 2670 * 2671 * Side Effects: 2672 * Loads. Nodes are added to the list of all targets, nodes and links 2673 * are added to the dependency graph. etc. etc. etc. 2674 *--------------------------------------------------------------------- 2675 */ 2676 void 2677 Parse_File(const char *name, FILE *stream) 2678 { 2679 char *cp, /* pointer into the line */ 2680 *line; /* the line we're working on */ 2681 2682 inLine = FALSE; 2683 fatals = 0; 2684 2685 curFile.fname = UNCONST(name); 2686 curFile.F = stream; 2687 curFile.lineno = 0; 2688 2689 ParseSetParseFile(curFile.fname); 2690 2691 do { 2692 while ((line = ParseReadLine ()) != NULL) { 2693 if (*line == '.') { 2694 /* 2695 * Lines that begin with the special character are either 2696 * include or undef directives. 2697 */ 2698 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2699 continue; 2700 } 2701 if (strncmp(cp, "include", 7) == 0 || 2702 ((cp[0] == 's' || cp[0] == '-') && 2703 strncmp(&cp[1], "include", 7) == 0)) { 2704 ParseDoInclude (cp); 2705 goto nextLine; 2706 } else if (strncmp(cp, "undef", 5) == 0) { 2707 char *cp2; 2708 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2709 continue; 2710 } 2711 2712 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2713 (*cp2 != '\0'); cp2++) { 2714 continue; 2715 } 2716 2717 *cp2 = '\0'; 2718 2719 Var_Delete(cp, VAR_GLOBAL); 2720 goto nextLine; 2721 } 2722 } 2723 if (*line == '#') { 2724 /* If we're this far, the line must be a comment. */ 2725 goto nextLine; 2726 } 2727 2728 if (*line == '\t') { 2729 /* 2730 * If a line starts with a tab, it can only hope to be 2731 * a creation command. 2732 */ 2733 #ifndef POSIX 2734 shellCommand: 2735 #endif 2736 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2737 continue; 2738 } 2739 if (*cp) { 2740 if (inLine) { 2741 /* 2742 * So long as it's not a blank line and we're actually 2743 * in a dependency spec, add the command to the list of 2744 * commands of all targets in the dependency spec 2745 */ 2746 Lst_ForEach (targets, ParseAddCmd, cp); 2747 #ifdef CLEANUP 2748 Lst_AtEnd(targCmds, (ClientData) line); 2749 #endif 2750 continue; 2751 } else { 2752 Parse_Error (PARSE_FATAL, 2753 "Unassociated shell command \"%s\"", 2754 cp); 2755 } 2756 } 2757 #ifdef SYSVINCLUDE 2758 } else if (((strncmp(line, "include", 7) == 0 && 2759 isspace((unsigned char) line[7])) || 2760 ((line[0] == 's' || line[0] == '-') && 2761 strncmp(&line[1], "include", 7) == 0 && 2762 isspace((unsigned char) line[8]))) && 2763 strchr(line, ':') == NULL) { 2764 /* 2765 * It's an S3/S5-style "include". 2766 */ 2767 ParseTraditionalInclude (line); 2768 goto nextLine; 2769 #endif 2770 } else if (Parse_IsVar (line)) { 2771 ParseFinishLine(); 2772 Parse_DoVar (line, VAR_GLOBAL); 2773 } else { 2774 /* 2775 * We now know it's a dependency line so it needs to have all 2776 * variables expanded before being parsed. Tell the variable 2777 * module to complain if some variable is undefined... 2778 * To make life easier on novices, if the line is indented we 2779 * first make sure the line has a dependency operator in it. 2780 * If it doesn't have an operator and we're in a dependency 2781 * line's script, we assume it's actually a shell command 2782 * and add it to the current list of targets. 2783 */ 2784 #ifndef POSIX 2785 Boolean nonSpace = FALSE; 2786 #endif 2787 2788 cp = line; 2789 if (isspace((unsigned char) line[0])) { 2790 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2791 cp++; 2792 } 2793 if (*cp == '\0') { 2794 goto nextLine; 2795 } 2796 #ifndef POSIX 2797 while (*cp && (ParseIsEscaped(line, cp) || 2798 (*cp != ':') && (*cp != '!'))) { 2799 nonSpace = TRUE; 2800 cp++; 2801 } 2802 #endif 2803 } 2804 2805 #ifndef POSIX 2806 if (*cp == '\0') { 2807 if (inLine) { 2808 Parse_Error (PARSE_WARNING, 2809 "Shell command needs a leading tab"); 2810 goto shellCommand; 2811 } else if (nonSpace) { 2812 Parse_Error (PARSE_FATAL, "Missing operator"); 2813 } 2814 } else { 2815 #endif 2816 ParseFinishLine(); 2817 2818 cp = Var_Subst (NULL, line, VAR_CMD, TRUE); 2819 free (line); 2820 line = cp; 2821 2822 /* 2823 * Need a non-circular list for the target nodes 2824 */ 2825 if (targets) 2826 Lst_Destroy(targets, NOFREE); 2827 2828 targets = Lst_Init (FALSE); 2829 inLine = TRUE; 2830 2831 ParseDoDependency (line); 2832 #ifndef POSIX 2833 } 2834 #endif 2835 } 2836 2837 nextLine: 2838 2839 free (line); 2840 } 2841 /* 2842 * Reached EOF, but it may be just EOF of an include file... 2843 */ 2844 } while (ParseEOF(1) == CONTINUE); 2845 2846 /* 2847 * Make sure conditionals are clean 2848 */ 2849 Cond_End(); 2850 2851 if (fatals) { 2852 (void)fprintf(stderr, 2853 "%s: Fatal errors encountered -- cannot continue\n", 2854 progname); 2855 PrintOnError(NULL); 2856 exit (1); 2857 } 2858 } 2859 2860 /*- 2861 *--------------------------------------------------------------------- 2862 * Parse_Init -- 2863 * initialize the parsing module 2864 * 2865 * Results: 2866 * none 2867 * 2868 * Side Effects: 2869 * the parseIncPath list is initialized... 2870 *--------------------------------------------------------------------- 2871 */ 2872 void 2873 Parse_Init(void) 2874 { 2875 mainNode = NILGNODE; 2876 parseIncPath = Lst_Init (FALSE); 2877 sysIncPath = Lst_Init (FALSE); 2878 defIncPath = Lst_Init (FALSE); 2879 includes = Lst_Init (FALSE); 2880 #ifdef CLEANUP 2881 targCmds = Lst_Init (FALSE); 2882 #endif 2883 } 2884 2885 void 2886 Parse_End(void) 2887 { 2888 #ifdef CLEANUP 2889 Lst_Destroy(targCmds, (void (*)(ClientData))) free; 2890 if (targets) 2891 Lst_Destroy(targets, NOFREE); 2892 Lst_Destroy(defIncPath, Dir_Destroy); 2893 Lst_Destroy(sysIncPath, Dir_Destroy); 2894 Lst_Destroy(parseIncPath, Dir_Destroy); 2895 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2896 #endif 2897 } 2898 2899 2900 /*- 2901 *----------------------------------------------------------------------- 2902 * Parse_MainName -- 2903 * Return a Lst of the main target to create for main()'s sake. If 2904 * no such target exists, we Punt with an obnoxious error message. 2905 * 2906 * Results: 2907 * A Lst of the single node to create. 2908 * 2909 * Side Effects: 2910 * None. 2911 * 2912 *----------------------------------------------------------------------- 2913 */ 2914 Lst 2915 Parse_MainName(void) 2916 { 2917 Lst mainList; /* result list */ 2918 2919 mainList = Lst_Init (FALSE); 2920 2921 if (mainNode == NILGNODE) { 2922 Punt ("no target to make."); 2923 /*NOTREACHED*/ 2924 } else if (mainNode->type & OP_DOUBLEDEP) { 2925 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2926 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2927 } 2928 else 2929 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2930 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 2931 return (mainList); 2932 } 2933 2934 /*- 2935 *----------------------------------------------------------------------- 2936 * ParseMark -- 2937 * Add the filename and lineno to the GNode so that we remember 2938 * where it was first defined. 2939 * 2940 * Side Effects: 2941 * None. 2942 * 2943 *----------------------------------------------------------------------- 2944 */ 2945 static void 2946 ParseMark(GNode *gn) 2947 { 2948 gn->fname = strdup(curFile.fname); 2949 gn->lineno = curFile.lineno; 2950 } 2951