dmake/rulparse.c

   1 /* $RCSfile: rulparse.c,v $
   2 -- $Revision: 1.12 $
   3 -- last change: $Author: ihi $ $Date: 2007-10-15 15:41:24 $
   4 --
   5 -- SYNOPSIS
   6 --      Perform semantic analysis on input
   7 --
   8 -- DESCRIPTION
   9 --  This code performs semantic analysis on the input, and builds
  10 --  the complex internal datastructure that is used to represent
  11 --  the user makefile.
  12 --
  13 -- AUTHOR
  14 --      Dennis Vadura, dvadura@dmake.wticorp.com
  15 --
  16 -- WWW
  17 --      http://dmake.wticorp.com/
  18 --
  19 -- COPYRIGHT
  20 --      Copyright (c) 1996,1997 by WTI Corp.  All rights reserved.
  21 --
  22 --      This program is NOT free software; you can redistribute it and/or
  23 --      modify it under the terms of the Software License Agreement Provided
  24 --      in the file <distribution-root>/readme/license.txt.
  25 --
  26 -- LOG
  27 --      Use cvs log to obtain detailed change logs.
  28 */
  29
  30 #include "extern.h"
  31
  32 /* prototypes for local functions */
  33 static  void    _add_indirect_prereq ANSI((CELLPTR));
  34 static  int     _add_root ANSI((CELLPTR));
  35 static  CELLPTR _build_graph ANSI((int, CELLPTR, CELLPTR));
  36 static  char*   _build_meta ANSI((char*));
  37 static  int _do_magic ANSI((int, char*, CELLPTR, CELLPTR, t_attr, char*));
  38 static  void    _do_special ANSI((int, int, t_attr,char*,CELLPTR,CELLPTR,int*));
  39 static  int _do_targets ANSI((int, t_attr, char*, CELLPTR, CELLPTR));
  40 static  t_attr  _is_attribute ANSI((char*));
  41 static  int _is_special ANSI((char*));
  42 static  char*   _is_magic ANSI((char*));
  43 static  int _is_percent ANSI((char*));
  44 static  CELLPTR _make_multi ANSI((CELLPTR));
  45 static  CELLPTR _replace_cell ANSI((CELLPTR,CELLPTR,CELLPTR));
  46 static  void    _set_attributes ANSI((t_attr, char*, CELLPTR ));
  47 static  void    _stick_at_head ANSI((CELLPTR, CELLPTR));
  48 static  void    _set_global_attr ANSI((t_attr));
  49
  50
  51 /* static variables that must persist across invocation of Parse_rule_def */
  52 static CELLPTR    _sv_targets = NIL(CELL);
  53 static STRINGPTR  _sv_rules   = NIL(STRING); /* first recipe element. */
  54 static STRINGPTR  _sv_crule   = NIL(STRING); /* current/last recipe element. */
  55 static CELLPTR    _sv_edgel   = NIL(CELL);
  56 static LINKPTR    _sv_ind_prq = NIL(LINK);   /* indirect prerequisites for % cell */
  57 static int    _sp_target  = FALSE;
  58 static t_attr     _sv_attr;
  59 static int        _sv_flag;
  60 static int    _sv_op;
  61 static char      *_sv_setdir;
  62 static char   _sv_globprq_only = 0;
  63
  64 /* Define for global attribute mask (A_SWAP == A_WINPATH) */
  65 #define A_GLOB   (A_PRECIOUS | A_SILENT | A_IGNORE | A_EPILOG | A_SWAP |\
  66           A_SHELL | A_PROLOG | A_NOINFER | A_SEQ | A_MKSARGS )
  67
  68
  69 PUBLIC int
  70 Parse_rule_def( state )/*
  71 =========================
  72    Parse the rule definition contained in Buffer, and modify the state
  73    if appropriate.  The function returns 0, if the definition is found to
  74    be an illegal rule definition, and it returns 1 if it is a rule definition.
  75    */
  76 int *state;
  77 {
  78    TKSTR    input;      /* input string struct for token search   */
  79    CELLPTR  targets;    /* list of targets if any         */
  80    CELLPTR  prereq;     /* list of prereq if any          */
  81    CELLPTR  prereqtail; /* tail of prerequisite list          */
  82    CELLPTR  cp;     /* temporary cell pointer for list making */
  83    char     *result;    /* temporary storage for result       */
  84    char     *tok;       /* temporary pointer for tokens       */
  85    char         *set_dir;       /* value of setdir attribute              */
  86    char     *brk;       /* break char list for Get_token      */
  87    char         *firstrcp;      /* first recipe line, from ; in rule line */
  88    t_attr       attr;           /* sum of attribute flags for current tgts*/
  89    t_attr   at;     /* temp place to keep an attribute code   */
  90    int      op;     /* rule operator              */
  91    int      special;    /* indicate special targets in rule   */
  92    int      augmeta;    /* indicate .<suffix> like target     */
  93    int      percent;    /* indicate percent rule target       */
  94    int      percent_prq;    /* indicate mixed %-rule prereq possible  */
  95
  96    DB_ENTER( "Parse_rule_def" );
  97
  98    op         = 0;
  99    attr       = 0;
 100    special    = 0;
 101    augmeta    = 0;
 102    percent    = 0;
 103    set_dir    = NIL( char );
 104    targets    = NIL(CELL);
 105    prereq     = NIL(CELL);
 106    prereqtail = NIL(CELL);
 107    percent_prq = 0;
 108
 109    /* Check to see if the line is of the form:
 110     *    targets : prerequisites; first recipe line
 111     * If so remember the first_recipe part of the line. */
 112
 113    firstrcp = strchr( Buffer, ';' );
 114    if( firstrcp != NIL( char ) ) {
 115       *firstrcp++ = 0;
 116       firstrcp = DmStrSpn( firstrcp, " \t" );
 117    }
 118
 119    result = Expand( Buffer );
 120    /* Remove CONTINUATION_CHAR, keep the <nl> */
 121    for( brk=strchr(result,CONTINUATION_CHAR); brk != NIL(char); brk=strchr(brk,CONTINUATION_CHAR) )
 122       if( brk[1] == '\n' )
 123      *brk = ' ';
 124       else
 125          brk++;
 126
 127    DB_PRINT( "par", ("Scanning: [%s]", result) );
 128
 129    SET_TOKEN( &input, result );
 130    brk = ":-^!|";
 131    Def_targets = TRUE;
 132
 133    /* Scan the input rule line collecting targets, the operator, and any
 134     * prerequisites.  Stop when we run out of targets and prerequisites. */
 135
 136    while( *(tok = Get_token( &input, brk, TRUE )) != '\0' )
 137       if( !op ) {
 138      /* we are scanning targets and attributes
 139       * check to see if token is an operator.  */
 140
 141      op = Rule_op( tok );
 142
 143      if( !op ) {
 144         /* Define a new cell, or get pointer to pre-existing cell.  */
 145         /* Do we need cells for attributes? If not move the definition
 146          * to the target part.  */
 147         cp = Def_cell( tok );
 148         /* A $ character indicates either a literal $ in the pathname (this
 149          * was broken before) or a dynamic macro (this is a syntax error).
 150          * FIXME: Here would be the place to add a sanity check. */
 151         DB_PRINT( "par", ("tg_cell [%s]", tok) );
 152
 153         if( (at = _is_attribute(tok)) != 0 ) {
 154            /* Ignore .SILENT when -vr is active. */
 155            if( (Verbose & V_FORCEECHO) && (at == A_SILENT) )
 156           at = 0;
 157
 158            /* Logically OR the attributes specified into one main
 159             * ATTRIBUTE mask. */
 160
 161            if( at == A_SETDIR ) {
 162               if( set_dir != NIL( char ) )
 163                  Warning( "Multiple .SETDIR attribute ignored" );
 164               else
 165                  set_dir = DmStrDup( tok );
 166            }
 167
 168            attr |= at;
 169         }
 170         else {
 171            /* Not an attribute, this must be a target. */
 172            int tmp;
 173
 174            tmp = _is_special( tok );
 175
 176            if( _is_percent( tok ) ) {
 177           /* First %-target checks if there were non-%-targets before. */
 178           if( !percent && targets != NIL(CELL) )
 179              Fatal( "A %%-target must not be mixed with non-%%-targets, offending target [%s]", tok );
 180
 181           percent++;
 182           cp->ce_flag |= F_PERCENT;
 183            } else {
 184           if( percent )
 185              Fatal( "A non-%%-target must not be mixed with %%-targets, offending target [%s]", tok );
 186            }
 187
 188            if( _is_magic( tok ) ) {
 189           /* Check that AUGMAKE targets are not mixed with other
 190            * targets. The return value of _is_magic() is discarded and
 191            * calculated again in _do_targets() if this rule definition
 192            * really is a .<suffix> like target.
 193            * If we would allow only one target per line we could easily
 194            * store the result for later, but for multiple .<suffix>
 195            * targets this creates too much overhead.
 196            * These targets should be rare (obsolete?) anyway. */
 197           if( !augmeta && targets != NIL(CELL) )
 198              Fatal( "An AUGMAKE meta target must not be mixed with non AUGMAKE meta targets, offending target [%s]", tok );
 199
 200           augmeta++;
 201           cp->ce_flag |= F_MAGIC; /* do_magic will also add F_PERCENT later. */
 202            } else {
 203           if( augmeta )
 204              Fatal( "A non AUGMAKE meta target must not be mixed with AUGMAKE meta targets, offending target [%s]", tok );
 205            }
 206
 207            if( special )
 208               Fatal( "Special target must appear alone, found [%s]", tok );
 209            else if( !(cp->ce_flag & F_MARK) ) {
 210           /* Targets are kept in this list in lexically sorted order.
 211            * This allows for easy equality comparison of target
 212            * sets.*/
 213           CELLPTR prev,cur;
 214           for(prev=NIL(CELL),cur=targets;cur;prev=cur,cur=cur->ce_link)
 215              if(strcmp(cur->CE_NAME,cp->CE_NAME) > 0)
 216             break;
 217
 218           cp->ce_link = cur;
 219
 220           if (!prev)
 221              targets = cp;
 222           else
 223              prev->ce_link = cp;
 224
 225           cp->ce_flag |= F_MARK | F_EXPLICIT;
 226           special = tmp;
 227            }
 228            else
 229               Warning( "Duplicate target [%s]", cp->CE_NAME );
 230         }
 231      }
 232      else {
 233         /* found an operator so empty out break list and clear mark
 234          * bits on target list, setting them all to F_VISITED*/
 235
 236         brk  = "";
 237         for( cp=targets; cp != NIL(CELL); cp=cp->ce_link ) {
 238            cp->ce_flag ^= F_MARK;
 239            cp->ce_flag |= F_VISITED;
 240         }
 241
 242         Def_targets = FALSE;
 243      }
 244       }
 245       else {
 246          /* Scanning prerequisites so build the prerequisite list.  We use
 247           * F_MARK flag to make certain we have only a single copy of the
 248           * prerequisite in the list */
 249
 250      cp = Def_cell( tok );
 251
 252      /* %-prerequisits require eiter a %-target or this might be a rule of
 253       * the "ATTRIBUTE_LIST : targets" form. */
 254      if( _is_percent( tok ) ) {
 255         if( percent || ((targets == NIL(CELL)) && attr) )
 256            percent_prq = 1;
 257         else
 258            Fatal( "Syntax error in %% rule, missing %% target");
 259      }
 260
 261      if( cp->ce_flag & F_VISITED ) {
 262         if( cp->ce_attr & A_COMPOSITE )
 263            continue;
 264         else
 265            Fatal( "Detected circular dependency in graph at [%s]",
 266               cp->CE_NAME );
 267      }
 268          else if( !(cp->ce_flag & F_MARK) ) {
 269         DB_PRINT( "par", ("pq_cell [%s]", tok) );
 270         cp->ce_flag |= F_MARK;
 271
 272         if( prereqtail == NIL(CELL) )   /* keep prereq's in order */
 273            prereq = cp;
 274         else
 275            prereqtail->ce_link = cp;
 276
 277         prereqtail = cp;
 278         cp->ce_link = NIL(CELL);
 279      }
 280      else if( !(cp->ce_attr & A_LIBRARY) && (Verbose & V_WARNALL))
 281         Warning("Duplicate entry [%s] in prerequisite list",cp->CE_NAME);
 282       }
 283
 284    /* Check to see if we have a percent rule that has only global
 285     * prerequisites, i.e. they are of the form: "%.a : foo".
 286     * If so then set the flag so that later on, we don't issue
 287     * an error if such targets supply an empty set of rules. */
 288
 289    if( percent && !percent_prq && (prereq != NIL(CELL)) )
 290       _sv_globprq_only = 1;
 291
 292    /* It's ok to have targets with attributes, and no prerequisites, but it's
 293     * not ok to have no targets and no attributes, or no operator */
 294
 295    if( !op ) {
 296       CLEAR_TOKEN( &input );
 297       DB_PRINT( "par", ("Not a rule [%s]", Buffer) );
 298       DB_RETURN( 0 );
 299    }
 300
 301    /* More than one percent target didn't work with prior versions. */
 302    if( (percent > 1) && !(op & R_OP_OR) )
 303       Warning( "Prior to dmake 4.5 only one\n"
 304       "%%-target per target-definition worked reliably. Check your makefiles.\n" );
 305
 306    if( !attr && targets == NIL(CELL) ) {
 307       Fatal( "Missing targets or attributes in rule" );
 308       if( set_dir != NIL( char )) FREE( set_dir );
 309       DB_RETURN( 0 );
 310    }
 311
 312    /* We have established we have a legal rules line, so we must process it.
 313     * In doing so we must handle any special targets.  Special targets must
 314     * appear alone possibly accompanied by attributes.
 315     * NOTE:  special != 0  ==> targets != NIL(CELL) */
 316
 317    if( prereqtail != NIL(CELL) ) prereqtail->ce_link = NIL(CELL);
 318
 319    /* Clear out MARK bits used in duplicate checking.  I originally wanted
 320     * to do this as the lists get processed but that got too error prone
 321     * so I bit the bullit and added these two loops. */
 322
 323    for( cp=prereq;  cp != NIL(CELL); cp=cp->ce_link ) cp->ce_flag &= ~F_MARK;
 324    for( cp=targets; cp != NIL(CELL); cp=cp->ce_link ) cp->ce_flag &= ~F_VISITED;
 325
 326    /* Check to see if the previous recipe was bound, if not the call
 327     * Bind_rules_to_targets() to bind the recipe (_sv_rules) to the
 328     * target(s) (_sv_targets). */
 329    /* was:  if( _sv_rules != NIL(STRING) ) Bind_rules_to_targets( F_DEFAULT );*/
 330    /* Only Add_recipe_to_list() sets _sv_rules and Bind_rules_to_targets()
 331     * clears the (static) variables again.  Bind_rules_to_targets() is
 332     * (should be) called after State is leaving RULE_SCAN in Parse().
 333     * Abort if there are unbound recipes. FIXME: Remove this paragraph
 334     * if this never occurs.  */
 335    if( _sv_rules != NIL(STRING) )
 336       Fatal( "Internal Error: _sv_rules not empty." );
 337
 338    /* Add the first recipe line to the list */
 339    if( firstrcp != NIL( char ) )
 340       Add_recipe_to_list( firstrcp, TRUE, FALSE );
 341
 342    /* Save these prior to calling _do_targets, since _build_graph needs the
 343     * _sv_setdir value for matching edges. */
 344    _sv_op     = op;
 345    _sv_setdir = set_dir;
 346
 347    if( special )
 348       /* _do_special() can alter *state */
 349       _do_special( special, op, attr, set_dir, targets, prereq, state );
 350    else
 351       *state = _do_targets( op, attr, set_dir, targets, prereq );
 352
 353    if( (*state != RULE_SCAN) && (_sv_rules != NIL(STRING)) )
 354       Fatal( "Unexpected recipe found." );
 355
 356    DB_RETURN( 1 );
 357 }
 358
 359
 360 PUBLIC int
 361 Rule_op( op )/*
 362 ================
 363    Check the passed in op string and map it to one of the rule operators */
 364 char *op;
 365 {
 366    int ret = 0;
 367
 368    DB_ENTER( "rule_op" );
 369
 370    if( *op == TGT_DEP_SEP ) {
 371       ret = R_OP_CL;
 372       op++;
 373
 374       /* All rule operations begin with a :, but may include any one of the
 375        * four modifiers.  In order for the rule to be properly mapped we must
 376        * check for each of the modifiers in turn, building up our return bit
 377        * string. */
 378
 379       while( *op && ret )
 380          switch( *op ) {
 381         case ':': ret |= R_OP_DCL; op++; break;
 382         case '!': ret |= R_OP_BG;  op++; break;
 383         case '^': ret |= R_OP_UP;  op++; break;
 384         case '-': ret |= R_OP_MI;  op++; break;
 385         case '|': ret |= R_OP_OR;  op++; break;
 386
 387         default : ret  = 0;  /* an invalid modifier, chuck whole string */
 388          }
 389
 390       if( *op != '\0' ) ret = 0;
 391    }
 392
 393    DB_RETURN( ret );
 394 }
 395
 396
 397 PUBLIC void
 398 Add_recipe_to_list( rule, white_too, no_check )/*
 399 =================================================
 400         Take the provided string and add it to the list of recipe lines
 401     we are saving to be added to the list of targets we have built
 402     previously.  If white_too == TRUE add the rule EVEN IF it contains only
 403         an empty string (whitespace is handled by Def_recipe()). */
 404 char *rule;
 405 int  white_too;
 406 int  no_check;
 407 {
 408    DB_ENTER( "Add_recipe_to_list" );
 409
 410    if( rule != NIL( char ) && (*rule != '\0' || white_too) ) {
 411       DB_PRINT( "par", ("Adding recipe [%s]", rule) );
 412       _sv_crule = Def_recipe( rule, _sv_crule, white_too, no_check );
 413
 414       /* If _sv_rules is not yet set this must be the first recipe line,
 415        * remember it. */
 416       if( _sv_rules == NIL(STRING) )
 417          _sv_rules = _sv_crule;
 418    }
 419
 420    DB_VOID_RETURN;
 421 }
 422
 423
 424 PUBLIC void
 425 Bind_rules_to_targets( flag )/*
 426 ===============================
 427         Take the recipe lines we have defined and bind them with proper attributes
 428         to the targets that were previously defined in the parse.  The
 429         attributes that get passed here are merged with those that are were
 430         previously defined.  (namely attribute F_SINGLE) */
 431 int flag;
 432 {
 433    CELLPTR tg;             /* pointer to current target in list */
 434    LINKPTR lp;         /* pointer to link cell      */
 435    int     magic;          /* TRUE if target of % or .xxx.yyy form */
 436    int     tflag;          /* TRUE if we assigned targets here  */
 437
 438    DB_ENTER( "Bind_rules_to_targets" );
 439
 440    /* This line is needed since Parse may call us twice when the last
 441     * GROUP rule appears at the end of file.  In this case the rules
 442     * have already been bound and we want to ignore them. */
 443
 444    if( _sv_targets == NIL(CELL) ) { DB_VOID_RETURN; }
 445
 446    tflag  = FALSE;
 447    flag  |= (_sv_flag & F_SINGLE);
 448    flag  |= ((_sv_attr & A_GROUP) ? F_GROUP : 0);
 449
 450    for( tg = _sv_targets; tg != NIL(CELL); tg = tg->ce_link ) {
 451       DB_PRINT( "par", ("Binding to %s, %04x", tg->CE_NAME, tg->ce_flag) );
 452       magic = tg->ce_flag & F_PERCENT;
 453
 454
 455       /* NOTE:  For targets that are magic or special we ignore any
 456        * previously defined rules, ie. We throw away the old definition
 457        * and use the new, otherwise we complain. */
 458       if( !(tg->ce_flag & F_MULTI) && !magic && (tg->CE_RECIPE != NIL(STRING))
 459       && !_sp_target && (_sv_rules != NIL(STRING)) )
 460          Fatal( "Multiply defined recipe for target %s", tg->CE_NAME );
 461
 462       if( (magic || _sp_target) && (_sv_rules == NIL(STRING)) &&
 463       !(tg->ce_flag & F_SPECIAL) && !_sv_globprq_only )
 464          Warning( "Empty recipe for special or meta target %s", tg->CE_NAME );
 465
 466       if( magic ) {
 467      CELLPTR ep;
 468
 469      for( ep=_sv_edgel; ep != NIL(CELL); ep=ep->ce_link ) {
 470         DB_PRINT( "par", ("ep address: %#x", ep) );
 471         /* %.xx :| '%.yy' abc xx '%.tt' ; touch $@
 472          * loops here ... */
 473         _set_attributes( _sv_attr, _sv_setdir, ep );
 474         ep->ce_flag |= (F_TARGET|flag);
 475
 476         if( _sv_rules != NIL(STRING) ) {
 477            ep->ce_recipe  = _sv_rules;
 478            ep->ce_indprq  = _sv_ind_prq;
 479         }
 480      }
 481       }
 482       else {
 483      tg->ce_attr |= _sv_attr;
 484      tg->ce_flag |= flag;
 485
 486      if( _sv_rules != NIL(STRING) ) {
 487         tg->ce_recipe  = _sv_rules;
 488         tg->ce_flag   |= F_RULES | F_TARGET;
 489
 490         /* Bind the current set of prerequisites as belonging to the
 491          * original recipe given for the target */
 492         for( lp=tg->ce_prq; lp != NIL(LINK); lp = lp->cl_next )
 493           if( !(lp->cl_flag & F_VISITED) ) lp->cl_flag |= F_TARGET;
 494          }
 495      else for( lp=tg->ce_prq; lp != NIL(LINK); lp = lp->cl_next )
 496         lp->cl_flag |= F_VISITED;
 497       }
 498
 499       tflag |= _add_root(tg);
 500    }
 501
 502    if( tflag ) Target = TRUE;
 503    if( _sv_setdir ) FREE(_sv_setdir);
 504    _sv_rules   = NIL(STRING);
 505    _sv_crule   = NIL(STRING);
 506    _sv_targets = NIL(CELL);
 507    _sv_ind_prq = NIL(LINK);
 508    _sv_edgel   = NIL(CELL);
 509    _sp_target  = FALSE;
 510    _sv_globprq_only = 0;
 511
 512    DB_VOID_RETURN;
 513 }
 514
 515
 516
 517 PUBLIC int
 518 Set_group_attributes( list )/*
 519 ==============================
 520     Scan list looking for the standard @,-,% and + (as in recipe line
 521     defs) (+ is set but ignored for group recipes)
 522     and set the flags accordingly so that they apply when we bind the
 523     rules to the appropriate targets.
 524     Return TRUE if group recipe start '[' was found, otherwise FALSE.  */
 525 char *list;
 526 {
 527    int res = FALSE;
 528    char *s;
 529
 530    if ( !((_sv_attr|Glob_attr)&A_IGNOREGROUP) ) {
 531       s = DmStrSpn(list,"@-%+ \t");
 532       res = (*s == '[');
 533       if( res ) {
 534      /* Check for non-white space characters after the [. */
 535      for( s++; *s && iswhite(*s) ; s++ )
 536         ;
 537      if( *s )
 538         Warning("Found non-white space character after '[' in [%s].", list);
 539
 540      _sv_attr |= Rcp_attribute(list);
 541       }
 542    }
 543
 544    return(res);
 545 }
 546
 547
 548 static void
 549 _do_special( special, op, attr, set_dir, target, prereq, state )/*
 550 ==================================================================
 551    Process a special target (always only a single target).  So far the only
 552    special targets we have are those recognized by the _is_special function.
 553    Some of the special targets can take recipes, they call _do_targets()
 554    and (implicitly) set *state to to RULE_SCAN. Otherwise *state remains
 555    unaffected, i.e. NORMAL_SCAN.
 556
 557    target is always only a single special target.
 558
 559    NOTE:  For the cases of .IMPORT, and .INCLUDE, the cells created by the
 560          parser are never freed.  This is due to the fact that it is too much
 561       trouble to get them out of the hash table once they are defined, and
 562       if they are per chance used again it will be ok, anyway, since the
 563       cell is not really used by the code below.  */
 564
 565 int special;
 566 int op;
 567 t_attr  attr;
 568 char    *set_dir;
 569 CELLPTR target;
 570 CELLPTR prereq;
 571 int     *state;
 572 {
 573    HASHPTR  hp;     /* pointer to macro def cell        */
 574    CELLPTR  cp;     /* temporary pointer into cells list    */
 575    CELLPTR  dp;     /* pointer to directory dir cell    */
 576    LINKPTR  lp;     /* pointer at prerequisite list     */
 577    char     *dir;       /* current dir to prepend       */
 578    char     *path;      /* resulting path to try to read    */
 579    char     *name;      /* File name for processing a .INCLUDE  */
 580    char     *tmp;       /* temporary string pointer     */
 581    FILE     *fil;       /* File descriptor returned by Openfile */
 582
 583    DB_ENTER( "_do_special" );
 584
 585    target->ce_flag = F_SPECIAL; /* mark the target as special */
 586
 587    switch( special ) {
 588       case ST_EXPORT:
 589      for( ; prereq != NIL(CELL); prereq = prereq->ce_link ) {
 590         DB_PRINT( "par", ("Exporting [%s]", prereq->CE_NAME) );
 591         hp = GET_MACRO( prereq->CE_NAME );
 592
 593         if( hp != NIL(HASH) ) {
 594            char *tmpstr = hp->ht_value;
 595
 596            if( tmpstr == NIL(char) ) tmpstr = "";
 597
 598            if( Write_env_string( prereq->CE_NAME, tmpstr ) != 0 )
 599           Warning( "Could not export %s", prereq->CE_NAME );
 600         }
 601      }
 602      break;
 603
 604       /* Simply cause the parser to fail on the next input read */
 605       case ST_EXIT:
 606          Skip_to_eof = TRUE;
 607          break;
 608
 609       case ST_IMPORT:
 610      for( ; prereq != NIL(CELL); prereq = prereq->ce_link ) {
 611         char *tmpstr;
 612
 613         DB_PRINT( "par", ("Importing [%s]", prereq->CE_NAME) );
 614
 615         if( strcmp(prereq->CE_NAME, ".EVERYTHING") == 0 ) {
 616            t_attr sattr = Glob_attr;
 617            Glob_attr |= A_SILENT;
 618
 619            ReadEnvironment();
 620
 621            Glob_attr = sattr;
 622         }
 623         else {
 624            tmpstr = Read_env_string( prereq->CE_NAME );
 625
 626            if( tmpstr != NIL(char) )
 627           Def_macro(prereq->CE_NAME, tmpstr, M_EXPANDED|M_LITERAL);
 628            else
 629           if( !((Glob_attr | attr) & A_IGNORE) )
 630              Fatal("Imported macro `%s' not found",prereq->CE_NAME);
 631         }
 632      }
 633
 634      attr &= ~A_IGNORE;
 635      break;
 636
 637       case ST_INCLUDE:
 638       {
 639      int pushed     = FALSE;
 640      int first      = (attr & A_FIRST);
 641      int ignore     = (((Glob_attr | attr) & A_IGNORE) != 0);
 642      int found      = FALSE;
 643          int noinf      = (attr & A_NOINFER);
 644      LINKPTR prqlnk = NIL(LINK);
 645      LINKPTR prqlst = NIL(LINK);
 646
 647      if( prereq == NIL(CELL) )  Fatal( "No .INCLUDE file(s) specified" );
 648
 649      dp = Def_cell( ".INCLUDEDIRS" );
 650
 651      if( (attr & A_SETDIR) && *(dir = strchr(set_dir, '=')+1) )
 652         pushed = Push_dir( dir, ".INCLUDE", ignore );
 653
 654      for( cp=prereq; cp != NIL(CELL); cp = cp->ce_link ) {
 655         LINKPTR ltmp;
 656         TALLOC(ltmp, 1, LINK);
 657         ltmp->cl_prq = cp;
 658
 659         if( prqlnk == NIL(LINK) )
 660            prqlst = ltmp;
 661         else
 662            prqlnk->cl_next = ltmp;
 663
 664         prqlnk = ltmp;
 665      }
 666
 667      for( ; prqlst != NIL(LINK); FREE(prqlst), prqlst=prqlnk ) {
 668         prqlnk = prqlst->cl_next;
 669         cp     = prqlst->cl_prq;
 670         name   = cp->CE_NAME;
 671
 672         /* Leave this here, it ensures that prqlst gets propely free'd */
 673         if ( first && found )
 674            continue;
 675
 676         if( *name == '<' ) {
 677            /* We have a file name enclosed in <....>
 678             * so get rid of the <> arround the file name */
 679
 680            name++;
 681            if( (tmp = strrchr( name, '>' )) != NIL( char ) )
 682           *tmp = 0;
 683
 684            if( If_root_path( name ) )
 685               fil = Openfile( name, FALSE, FALSE );
 686            else
 687           fil = NIL(FILE);
 688         }
 689         else
 690            fil = Openfile( name, FALSE, FALSE );
 691
 692         if( fil == NIL(FILE) && !If_root_path( name ) ) { /*if true ==> not found in current dir*/
 693
 694            /* Now we must scan the list of prerequisites for .INCLUDEDIRS
 695             * looking for the file in each of the specified directories.
 696         * if we don't find it then we issue an error.  The error
 697         * message is suppressed if the .IGNORE attribute of attr is
 698         * set.  If a file is found we call Parse on the file to
 699         * perform the parse and then continue on from where we left
 700         * off.  */
 701
 702            for(lp=dp->CE_PRQ; lp && fil == NIL(FILE); lp=lp->cl_next) {
 703           dir  = lp->cl_prq->CE_NAME;
 704           if( strchr(dir, '$') ) dir = Expand(dir);
 705           path = Build_path( dir, name );
 706
 707           DB_PRINT( "par", ("Trying to include [%s]", path) );
 708
 709           fil = Openfile( path, FALSE, FALSE );
 710           if( dir != lp->cl_prq->CE_NAME ) FREE(dir);
 711            }
 712         }
 713
 714         if (!noinf && fil == NIL(FILE)) {
 715            t_attr glob = Glob_attr;
 716            t_attr cattr = prqlst->cl_prq->ce_attr;
 717
 718            prqlst->cl_next = NIL(LINK);
 719            Glob_attr |= (attr&A_IGNORE);
 720            prqlst->cl_prq->ce_attr &= ~A_FRINGE;
 721
 722            if( Verbose & V_FILE_IO )
 723           printf( "%s:  Inferring include file [%s].\n",
 724               Pname, name );
 725            fil = TryFiles(prqlst);
 726
 727            Glob_attr = glob;
 728            prqlst->cl_prq->ce_attr |= (cattr & A_FRINGE);
 729         }
 730
 731         if( fil != NIL(FILE) ) {
 732            if( Verbose & V_FILE_IO )
 733           printf( "%s:  Parsing include file [%s].\n",
 734               Pname, name );
 735            Parse( fil );
 736            found = TRUE;
 737         }
 738         else if( !(ignore || first) )
 739            Fatal( "Include file %s, not found", name );
 740         else if( Verbose & V_FILE_IO )
 741            printf( "%s:  Include file [%s] was not found.\n",
 742               Pname, name );
 743      }
 744
 745      if ( !ignore && first && !found )
 746         Fatal( "No include file was found" );
 747
 748      if( pushed ) Pop_dir(FALSE);
 749      attr &= ~(A_IGNORE|A_SETDIR|A_FIRST|A_NOINFER);
 750       }
 751       break;
 752
 753       case ST_SOURCE:
 754            if( prereq != NIL(CELL) )
 755         _do_targets( op & (R_OP_CL | R_OP_MI | R_OP_UP), attr, set_dir,
 756              target, prereq );
 757      else {
 758         /* The old semantics of .SOURCE were that an empty list of
 759          * prerequisites clears the .SOURCE list.  So we must implement
 760          * that here as a clearout prerequisite operation.  Since this is
 761          * a standard operation with the :- opcode we can simply call the
 762          * proper routine with the target cell and it should do the trick
 763          */
 764
 765         if( op == R_OP_CL || (op & R_OP_MI) )
 766            Clear_prerequisites( target );
 767      }
 768
 769      op &= ~(R_OP_MI | R_OP_UP);
 770      break;
 771
 772       case ST_KEEP:
 773      if( Keep_state != NIL(char) ) break;
 774      Def_macro( ".KEEP_STATE", "_state.mk", M_EXPANDED );
 775      break;
 776
 777       case ST_REST:
 778          /* The rest of the special targets can all take recipes, as such they
 779       * must be able to affect the state of the parser. */
 780
 781      {
 782         int s_targ = Target;
 783
 784         Target     = TRUE;
 785         _sp_target = TRUE;
 786         *state     = _do_targets( op, attr, set_dir, target, prereq );
 787         Target     = s_targ;
 788
 789         target->ce_flag |= F_TARGET;
 790
 791         attr    = A_DEFAULT;
 792         op      = R_OP_CL;
 793      }
 794      break;
 795
 796       default:break;
 797    }
 798
 799    if( op   != R_OP_CL   ) Warning( "Modifier(s) for operator ignored" );
 800    if( attr != A_DEFAULT ) Warning( "Extra attributes ignored" );
 801
 802    DB_VOID_RETURN;
 803 }
 804
 805
 806
 807 static int
 808 _do_targets( op, attr, set_dir, targets, prereq )/*
 809 ===================================================
 810    Evaluate the values derived from the current target definition
 811    line. Helper functions _build_graph(), _do_magic(), _make_multi(),
 812    _add_root(), _replace_cell(), _set_attributes(), Clear_prerequisites()
 813    _stick_at_head(), Add_prerequisite() and _set_global_attr() are used.
 814    If successfull "_sv_targets" is set to "targets".
 815    Return RULE_SCAN if a recipe is expected to follow, otherwise
 816    NORMAL_SCAN. */
 817 int op;     /* rule operator                           */
 818 t_attr  attr;       /* attribute flags for current targets     */
 819 char    *set_dir;   /* value of setdir attribute               */
 820 CELLPTR targets;    /* list of targets (each cell maybe already
 821              * defined by a previous target definition
 822              * line.  */
 823 CELLPTR prereq;     /* list of prerequisites                   */
 824 {
 825    CELLPTR  tg1;        /* temporary target pointer     */
 826    CELLPTR  tp1;        /* temporary prerequisite pointer   */
 827    LINKPTR      prev_cell;  /* pointer for .UPDATEALL processing    */
 828    char     *p;     /* temporary char pointer       */
 829    int          tflag = FALSE;  /* set to TRUE if we add target to root */
 830    int          ret_state = RULE_SCAN;  /* Return state */
 831
 832    DB_ENTER( "_do_targets" );
 833
 834    /* If .UPDATEALL is set sort the target list that was temporary linked
 835     * with ce_link into a list using ce_link with ce_set pointing to the first
 836     * element. */
 837    /* FIXME: Check that .UPDATEALL and %-targets on one line work together. */
 838    if( attr & A_UPDATEALL ) {
 839       if( targets == NIL(CELL) )
 840      Fatal( ".UPDATEALL attribute requires non-empty list of targets" );
 841
 842       if (targets->ce_set == NIL(CELL)) {
 843      for(
 844         prev_cell=CeMeToo(targets),tg1=targets->ce_link;
 845         tg1 != NIL(CELL);
 846         tg1=tg1->ce_link
 847      ) {
 848         if (tg1->ce_set)
 849            Fatal( "Target [%s] appears on multiple .UPDATEALL lists",
 850               tg1->CE_NAME);
 851         tg1->ce_set = targets;
 852         TALLOC(prev_cell->cl_next, 1, LINK);
 853         prev_cell = prev_cell->cl_next;
 854         prev_cell->cl_prq = tg1;
 855      }
 856      targets->ce_set = targets;
 857       }
 858       else {
 859      LINKPTR ap;
 860      CELLPTR tp;
 861
 862      tp = targets;
 863      ap = CeMeToo(targets);
 864      while (ap && tp && ap->cl_prq == tp && tp->ce_set == targets) {
 865         ap = ap->cl_next;
 866         tp = tp->ce_link;
 867      }
 868      if (ap || tp)
 869         Fatal("Inconsistent .UPDATEALL lists for target [%s]",
 870           targets->CE_NAME);
 871       }
 872       targets->ce_link = NIL(CELL);
 873    }
 874
 875    for( tg1 = targets; tg1 != NIL(CELL); tg1 = tg1->ce_link ) {
 876       /* Check if tg1 is already marked as a %-target, but not a magic
 877        * (.xxx.yyy) target.  */
 878       int purepercent = (tg1->ce_flag & F_PERCENT) && !(tg1->ce_flag & F_MAGIC);
 879
 880       /* Check each target.  Check for inconsistencies between :: and : rule
 881        * sets.  :: may follow either : or :: but not the reverse.
 882        *
 883        * Any F_MULTI target (contains :: rules) is represented by a prerequisite
 884        * list hanging off the main target cell where each of the prerequisites
 885        * is a copy of the target cell but is not entered into the hash table.
 886        */
 887       if( !(op & R_OP_DCL ) && (tg1->ce_flag & F_MULTI) && !purepercent )
 888      Fatal( "':' vs '::' inconsistency in rules for %s", tg1->CE_NAME );
 889
 890       if( purepercent ) {
 891      /* Handle %-targets. */
 892      CELLPTR cur;
 893      CELLPTR tpq = NIL(CELL);
 894      CELLPTR nprq = NULL;
 895
 896 #ifdef DBUG
 897      DB_PRINT( "%", ("Handling %%-target [%s : : <prerequisites follow, maybe empty>]",
 898              tg1->CE_NAME) );
 899      for(cur=prereq;cur;cur=cur->ce_link) {
 900         DB_PRINT( "%", ("         %%-prerequisites : %s ",
 901                 cur->CE_NAME ? cur->CE_NAME : "<empty>") );
 902      }
 903 #endif
 904
 905      /* Handle indirect (global) prerequisites first. */
 906      for(cur=prereq;cur;cur=cur->ce_link) {
 907         char *name = cur->CE_NAME;
 908         int   len  = strlen(name);
 909
 910         if( *name == '\'' && name[len-1]=='\'' ){
 911            name[len-1] = '\0';
 912            len = strlen(name+1)+1;
 913            memmove(name,name+1,len);
 914            /* add indirect prerequisite */
 915            _add_indirect_prereq( cur );
 916         }
 917         else {
 918            /* Sort all "other" prerequisits into tpq, with nprq
 919         * pointing to the first element. */
 920            if (tpq)
 921           tpq->ce_link = cur;
 922            else
 923           nprq = cur;
 924            tpq = cur;
 925         }
 926      }
 927      /* Mark the last element of nprq. */
 928      if(tpq)
 929         tpq->ce_link=NIL(CELL);
 930      else
 931         nprq = NIL(CELL);
 932
 933      /* Handle "normal" prerequisites now. */
 934
 935      if ( op & R_OP_OR ) {
 936         /* for op == ':|' transform:
 937          * <%-target> :| <prereq_1> ... <prereq_n> ; <recipe>
 938          * into:
 939          * <%-target> : <prereq_1> ; <recipe>
 940          * ..
 941          * <%-target> : <prereq_n> ; <recipe>
 942          */
 943         for(tp1=nprq; tp1; tp1=tp1->ce_link) {
 944            CELLPTR tmpcell = tp1->ce_link;
 945            tp1->ce_link = NIL(CELL);
 946            _build_graph(op,tg1,tp1);
 947            tp1->ce_link = tmpcell;
 948         }
 949      }
 950      else {
 951         /* The inference mechanism for %-targets limits the number of
 952          * (non-indirect) prerequisite to one, but an unlimited number
 953          * of indirect prerequisites is possible. */
 954         if ( nprq && nprq->ce_link && !(op & R_OP_OR))
 955            Warning("More than one prerequisite\n"
 956            "for %%-target. Use :| ruleop or indirect prerequisites.");
 957
 958         _build_graph(op,tg1,nprq);
 959      }
 960       }
 961       else if( tg1->ce_flag & F_MAGIC &&
 962            (p = _is_magic( tg1->CE_NAME )) != NIL(char) &&
 963            _do_magic( op, p, tg1, prereq, attr, set_dir ) )
 964     ; /* _do_magic() does all that is needed (if return value is TRUE). */
 965       else if( op & R_OP_DCL ) {  /* op == :: */
 966      CELLPTR tmp_cell = _make_multi(tg1);
 967
 968      /* Add the F_MULTI master to .TARGETS (If not set already).
 969       * Do this here so that the member cell is not added instead
 970       * when the recipies are bound in Bind_rules_to_targets(). */
 971      tflag |= _add_root(tg1);
 972
 973      /* Replace the F_MULTI master with the member cell. */
 974      targets = _replace_cell( targets, tg1, tmp_cell );
 975
 976     /* We have to set (add) the attributes also for the F_MULTI master
 977      * target cell. As there is no recipe the setdir value is not
 978      * needed. _set_attributes() that follows in approx. 8 lines
 979      * will set the attributes for the F_MULTI member cell.  */
 980      tg1->ce_attr |= (attr & ~A_SETDIR);
 981
 982      /* Now switch tg1 to the current (F_MULTI prereq.) target.
 983       * All recipes have to be added to that cell and not to the
 984       * F_MULTI master.  */
 985      tg1 = tmp_cell;
 986       }
 987
 988       if( !purepercent ) _set_attributes( attr, set_dir, tg1 );
 989
 990       /* Build the proper prerequisite list of the target.  If the `-',
 991        * modifier was used clear the prerequisite list before adding any
 992        * new prerequisites.  Else add them to the head/tail as appropriate.
 993        *
 994        * If the target has F_PERCENT set then no prerequisites are used. */
 995
 996       if( !(tg1->ce_flag & F_PERCENT) ) {
 997      if( op & R_OP_MI ) Clear_prerequisites( tg1 ); /* op == :- */
 998
 999      if( (op & R_OP_UP) && (tg1->ce_prq != NIL(LINK)) ) /* op == :^ */
1000         _stick_at_head( tg1, prereq );
1001      else for( tp1=prereq; tp1 != NIL(CELL); tp1 = tp1->ce_link )
1002         Add_prerequisite( tg1, tp1, FALSE, FALSE );
1003       }
1004       else if( op & (R_OP_MI | R_OP_UP) )
1005      Warning( "Modifier(s) `^-' for %-meta target ignored" );
1006    }
1007
1008    /* In case a F_MULTI member that was the first prerequisite of .TARGETS */
1009    if(tflag)
1010       Target = TRUE;
1011
1012    /* Check to see if we have NO targets but some attributes, i.e. an
1013     * Attribute-Definition.  If so then apply all of the attributes to the
1014     * complete list of prerequisites.  No recipes are allowed to follow. */
1015
1016    if( (targets == NIL(CELL)) && attr ) {
1017       ret_state = NORMAL_SCAN;
1018       if( prereq != NIL(CELL) )
1019      for( tp1=prereq; tp1 != NIL(CELL); tp1 = tp1->ce_link )
1020         _set_attributes( attr, set_dir, tp1 );
1021       else
1022      _set_global_attr( attr );
1023    }
1024
1025    /* Now that we have built the lists of targets, the parser must parse the
1026     * recipes if there are any.  However we must start the recipe list with the
1027     * recipe specified as via the ; kludge, if there is one */
1028    _sv_targets = targets;
1029    _sv_attr    = attr;
1030    _sv_flag    = ((op & R_OP_BG) ? F_SINGLE : F_DEFAULT);
1031
1032    DB_RETURN( ret_state );
1033 }
1034
1035
1036 static int
1037 _do_magic( op, dot, target, prereq, attr, set_dir )/*
1038 =====================================================
1039    This function investigates dot for being a magic target of the form
1040    .<chars>.<chars> or .<chars> and creates the appropriate % rules for
1041    that target.
1042    If the target is given with an undefined syntax, i.e. with prerequisites,
1043    then this function terminates early without creating % rules and
1044    returns 0.
1045    If successful the function returns 1.
1046
1047    The function builds the % rule, `%.o : %.c'  from .c.o, and
1048    `% : %.a' from .a */
1049
1050 int op;
1051 char    *dot;
1052 CELLPTR target;
1053 CELLPTR prereq;
1054 t_attr  attr;
1055 char    *set_dir;
1056 {
1057    CELLPTR tg;
1058    CELLPTR prq;
1059    char    *tmp, *tmp2;
1060
1061    DB_ENTER( "_do_magic" );
1062
1063    DB_PRINT("%", ("Analysing magic target [%s]", target->CE_NAME));
1064
1065    if( prereq != NIL(CELL) ) {
1066       Warning( "Ignoring AUGMAKE meta-target [%s] because prerequisites are present.", target->CE_NAME );
1067       DB_RETURN(0);
1068    }
1069
1070    if( dot == target->CE_NAME ) {    /* its of the form .a */
1071       tg  = Def_cell( "%" );
1072       tmp = _build_meta( target->CE_NAME );
1073       prq = Def_cell( tmp );
1074       FREE( tmp );
1075
1076       _build_graph( op, tg, prq );
1077    }
1078    else {
1079       tmp = _build_meta( dot );
1080       tg  = Def_cell( tmp );
1081       FREE( tmp );
1082
1083       tmp = _build_meta( tmp2 = DmSubStr( target->CE_NAME, dot ) );
1084       prq = Def_cell( tmp );
1085       FREE( tmp  );
1086       FREE( tmp2 );
1087
1088       _build_graph( op, tg, prq );
1089    }
1090
1091    tg->ce_flag      |= F_PERCENT;
1092    target->ce_flag  |= (F_MAGIC|F_PERCENT);
1093
1094    _set_attributes( attr, set_dir, tg );
1095
1096    DB_RETURN(1);
1097 }
1098
1099
1100 static CELLPTR
1101 _replace_cell( lst, cell, rep )/*
1102 =================================
1103    Replace cell with rep in lst. Note if cell is not part of lst we are in
1104    real trouble. */
1105 CELLPTR lst;
1106 CELLPTR cell;
1107 CELLPTR rep;
1108 {
1109    register CELLPTR tp;
1110
1111    if( lst == cell ) {
1112       rep->ce_link = lst->ce_link;
1113       lst = rep;
1114    }
1115    else {
1116       for( tp=lst; tp->ce_link != cell && tp ; tp=tp->ce_link );
1117       if( !tp )
1118      Fatal( "Internal Error: cell not part of lst." );
1119       rep->ce_link = tp->ce_link->ce_link;
1120       tp->ce_link = rep;
1121    }
1122
1123    return(lst);
1124 }
1125
1126
1127 static char *
1128 _build_meta( name )/*
1129 =====================
1130    Check to see if the name is of the form .c~ if so and if Augmake
1131    translation is enabled then return s.%.c, else return %.suff, where if the
1132    suffix ends in '~' then leave it be.*/
1133 char *name;
1134 {
1135    char *tmp;
1136    int  test = (STOBOOL(Augmake) ? name[strlen(name)-1] == '~' : 0);
1137
1138    tmp = DmStrJoin( test ? "s.%" : "%", name, -1, FALSE);
1139    if( test ) tmp[ strlen(tmp)-1 ] = '\0';
1140
1141    return(tmp);
1142 }
1143
1144
1145 static CELLPTR
1146 _build_graph( op, target, prereq )/*
1147 ====================================
1148    This function is called to build the graph for the % rule given by
1149    target : prereq cell combination.  This function assumes that target
1150    is a % target and that prereq is one or multiple non-indirect prerequisite.
1151    It also assumes that target cell has F_PERCENT set already.
1152
1153    NOTE: If more than one prerequisite is present this function handles them
1154    correctly but the lookup still only uses the first (BUG!).
1155
1156    R_OP_CL (:) rules replace existing rules if any, %.o :: %.c is meaningless.
1157
1158    The function always returns NIL(CELL). */
1159 int op;
1160 CELLPTR target;
1161 CELLPTR prereq;
1162 {
1163    LINKPTR edl;
1164    CELLPTR edge = 0;
1165    CELLPTR tpq,cur;
1166    int match;
1167
1168 #ifdef DBUG
1169    DB_ENTER( "_build_graph" );
1170    DB_PRINT( "%", ("Building graph for [%s : <prerequisites follow, maybe empty>]",
1171            target->CE_NAME) );
1172    for(tpq=prereq;tpq;tpq=tpq->ce_link) {
1173       DB_PRINT( "%", ("         %%-prerequisites : %s ",
1174               tpq->CE_NAME ? tpq->CE_NAME : "<empty>") );
1175    }
1176 #endif
1177
1178    /* Currently multiple prerequisites are not (yet) handled correctly.
1179     * We already issue a warning in _do_targets(), don't issue it here
1180     * again.
1181    if ( prereq && prereq->ce_link )
1182       Warning( "Internal Error: more than one prerequisite in _build_graph." );
1183     */
1184
1185    /* There cannot be more than one target name ( linked with
1186     * (CeMeToo(target))->cl_next ) per %-target master.
1187     * FIXME: remove this check after verifying that it never triggers. */
1188    if ( (CeMeToo(target))->cl_next )
1189       Fatal( "Internal Error: more than one target name in _build_graph." );
1190
1191    /* Search the list of prerequisites for the current target and see if
1192     * any of them match the current %-meta's : prereq's pair.  NOTE that
1193     * %-metas are built as if they were F_MULTI targets, i.e. the target
1194     * definitions for the %-target members are stored in the prerequisites
1195     * list of the master target. */
1196    /* This relies on target->ce_prq being NULL if this is the first
1197     * occurence of this %-target and therefore not yet having a %-target
1198     * master. */
1199    match = FALSE;
1200    for(edl=target->ce_prq; !match && edl != NIL(LINK); edl=edl->cl_next) {
1201       LINKPTR l1,l2;
1202       edge = edl->cl_prq;
1203
1204       DB_PRINT("%", ("Trying to match [%s]",edge?edge->CE_NAME:"(nil)"));
1205
1206       /* First we match the target sets, if this fails then we don't have to
1207        * bother with the prerequisite sets.  The targets sets are sorted.
1208        * this makes life very simple. */
1209       /* ce_dir is handled per member target, no check needed for the
1210        * master target. */
1211
1212       /* FIXME: We already checked above that there is only one target
1213        * name. Remove the comparisons for following names. */
1214       l1 = CeMeToo(target); /* Used by .UPDATEALL !!! */
1215       l2 = CeMeToo(edge);
1216       while(l1 && l2 && l1->cl_prq == l2->cl_prq) {
1217      l1=l1->cl_next;
1218      l2=l2->cl_next;
1219       }
1220       /* If both l1 and l2 are NULL we had a match. */
1221       if (l1 || l2)
1222      continue;
1223
1224       /* target sets match, so check prerequisites. */
1225       if(    (!edge->ce_prq && !prereq) /* matches both empty - separate this. */
1226       || (   edge->ce_prq
1227           && (   edge->ce_dir == _sv_setdir
1228           || (   edge->ce_dir
1229               && _sv_setdir
1230               && !strcmp(edge->ce_dir,strchr(_sv_setdir,'=')+1)
1231              )
1232          )
1233          )
1234       ) {
1235      LINKPTR prql;
1236
1237      /* this is a really gross way to compare two sets, it's n^2 but
1238       * since the sets are assumed to always be tiny, it should be ok. */
1239      for(tpq=prereq; tpq; tpq=tpq->ce_link) {
1240         for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1241            if (prql->cl_prq == tpq)
1242           break;
1243
1244         if(prql == NIL(LINK))
1245            break;
1246
1247         prql->cl_prq->ce_flag |= F_MARK;
1248      }
1249
1250      if (tpq == NIL(CELL)) {
1251         for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1252            if(!(prql->cl_prq->ce_flag & F_MARK))
1253           break;
1254
1255         if(prql == NIL(LINK))
1256         match = TRUE;
1257      }
1258
1259      /* clean up the mark bits. */
1260      for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1261         prql->cl_prq->ce_flag &= ~F_MARK;
1262       }
1263    }
1264
1265    if( match ) {
1266       /* match is TRUE hence, we found an edge joining the target and the
1267        * prerequisite so reset the new edge so that new values replace it. */
1268       DB_PRINT( "%", ("It's an old edge") );
1269
1270       edge->ce_dir    = NIL(char);
1271       edge->ce_flag  &= (F_PERCENT|F_MAGIC|F_DFA);
1272       edge->ce_attr  &= A_NOINFER;
1273    }
1274    else {
1275       DB_PRINT( "%", ("Adding a new edge") );
1276
1277       edge = _make_multi(target);
1278
1279       /* FIXME: There can be only one %-target. */
1280       for(edl=CeMeToo(target);edl;edl=edl->cl_next) {
1281      if( !((tpq=edl->cl_prq)->ce_flag & F_DFA) ) {
1282         Add_nfa( tpq->CE_NAME );
1283         tpq->ce_flag |= F_DFA;
1284      }
1285
1286      edl->cl_prq->ce_set = edge;
1287       }
1288
1289       edge->ce_all = target->ce_all;
1290       target->ce_all.cl_next = NIL(LINK);
1291       target->ce_set = NIL(CELL);
1292
1293       /* Add all prerequisites to edge. */
1294       for(tpq=prereq; tpq; tpq=tpq->ce_link)
1295          Add_prerequisite(edge, tpq, FALSE, TRUE);
1296    }
1297
1298    if( op & R_OP_DCL )
1299    Warning("'::' operator for meta-target '%s' ignored, ':' operator assumed.",
1300        target->CE_NAME );
1301
1302    /* If edge was already added we're in BIG trouble. */
1303    /* Re-use cur as temporary variable. */
1304    for( cur=_sv_edgel; cur != NIL(CELL); cur=cur->ce_link ) {
1305       if( cur == edge )
1306      Fatal( "Internal Error: edge already in _sv_edgel." );
1307    }
1308
1309    edge->ce_link = _sv_edgel;
1310    _sv_edgel = edge;
1311    _sv_globprq_only = 0;
1312
1313    DB_RETURN(NIL(CELL));
1314 }
1315
1316
1317 static CELLPTR
1318 _make_multi( tg )/*
1319 ===================
1320    This function is called to convert tg into an F_MULTI target.
1321    Return a pointer to the new member cell.
1322    I don't know what the author intended but the ce_index entry is only
1323    used in this function (set to 0 for added targets) and undefined otherwise!
1324    The undefined value is hopefully set to 0 by the C compiler as each added
1325    target sets its ce_count to ++ce_index (==1). (FIXME) */
1326 CELLPTR tg;
1327 {
1328    CELLPTR cp;
1329
1330    /* This creates a new master F_MULTI target if tg existed before as a normal
1331     * target with prerequisites or recipes. */
1332    if( !(tg->ce_flag & F_MULTI) && (tg->ce_prq || tg->ce_recipe) ) {
1333       /* Allocate a new master cell. */
1334       TALLOC(cp, 1, CELL);
1335       *cp = *tg;
1336
1337       /* F_MULTI master */
1338       tg->ce_prq    = NIL(LINK);
1339       tg->ce_flag  |= F_RULES|F_MULTI|F_TARGET;
1340       tg->ce_attr  |= A_SEQ;
1341       tg->ce_recipe = NIL(STRING);
1342       tg->ce_dir    = NIL(char);
1343
1344       /* F_MULTI member for preexisting elements */
1345       cp->ce_count  = ++tg->ce_index;
1346       cp->ce_cond   = NIL(STRING);
1347       cp->ce_set    = NIL(CELL);
1348       cp->ce_all.cl_prq = cp;
1349       CeNotMe(cp)   = NIL(LINK);
1350
1351       Add_prerequisite(tg, cp, FALSE, TRUE);
1352    }
1353
1354    /* Alocate memory for new member of F_MULTI target */
1355    TALLOC(cp, 1, CELL);
1356    *cp = *tg;
1357
1358    /* This is reached if the target already exists, but without having
1359     * prerequisites or recepies. Morph it into a F_MULTI master cell. */
1360    if( !(tg->ce_flag & F_MULTI) ) {
1361       tg->ce_prq    = NIL(LINK);
1362       tg->ce_flag  |= F_RULES|F_MULTI|F_TARGET;
1363       tg->ce_attr  |= A_SEQ;
1364       tg->ce_recipe = NIL(STRING);
1365       tg->ce_dir    = NIL(char);
1366       cp->ce_cond   = NIL(STRING);
1367    }
1368    /* This handles the case of adding an additional target as a
1369     * prerequisite to a F_MULTI target. */
1370    else {
1371       cp->ce_flag  &= ~(F_RULES|F_MULTI);
1372       cp->ce_attr  &= ~A_SEQ;
1373       cp->ce_prq    = NIL(LINK);
1374       cp->ce_index  = 0;
1375       cp->ce_cond   = NIL(STRING);
1376    }
1377    cp->ce_count = ++tg->ce_index;
1378    cp->ce_flag |= F_TARGET;
1379    cp->ce_set   = NIL(CELL);
1380    cp->ce_all.cl_prq = cp;
1381    CeNotMe(cp)  = NIL(LINK);
1382
1383    Add_prerequisite(tg, cp, FALSE, TRUE);
1384    return(cp);
1385 }
1386
1387
1388 static void
1389 _add_indirect_prereq( pq )/*
1390 ==========================
1391    Prerequisite is an indirect prerequisite for a %-target, add it to
1392    the target's list of indirect prerequsites to add on match. */
1393 CELLPTR pq;
1394 {
1395    register LINKPTR ln;
1396
1397    /* Only add to list of indirect prerequsites if it is not in already. */
1398    for(ln=_sv_ind_prq; ln; ln=ln->cl_next)
1399       if(strcmp(ln->cl_prq->CE_NAME,pq->CE_NAME) == 0)
1400      return;
1401
1402    /* Not in, add it. */
1403    TALLOC( ln, 1, LINK );
1404    ln->cl_next = _sv_ind_prq;
1405    ln->cl_prq  = pq;
1406    _sv_ind_prq = ln;
1407 }
1408
1409
1410
1411 static void
1412 _set_attributes( attr, set_dir, cp )/*
1413 ======================================
1414     Set the appropriate attributes for a cell */
1415 t_attr  attr;
1416 char    *set_dir;
1417 CELLPTR cp;
1418 {
1419    char   *dir = 0;
1420
1421    DB_ENTER( "_set_attributes" );
1422
1423    /* If .SETDIR attribute is set then we have at least .SETDIR= in the
1424     * set_dir string.  So go and fishout what is at the end of the =.
1425     * If not set and not NULL then propagate it to the target cell. */
1426
1427    if( attr & A_SETDIR ) {
1428       char *p;
1429       if( (p = strchr( set_dir, '=' )) != NULL )
1430          dir = p + 1;
1431
1432       if( cp->ce_dir )
1433      Warning( "Multiple .SETDIR for %s ignored", cp->CE_NAME );
1434       else if( *dir )
1435          cp->ce_dir = DmStrDup(dir);
1436    }
1437    cp->ce_attr |= attr;     /* set rest of attributes for target */
1438
1439    DB_VOID_RETURN;
1440 }
1441
1442
1443
1444 static void
1445 _set_global_attr( attr )/*
1446 ==========================
1447     Handle the setting of the global attribute functions based on
1448     The attribute flags set in attr. */
1449 t_attr attr;
1450 {
1451    t_attr flag;
1452
1453    /* Some compilers can't handle a switch on a long, and t_attr is now a long
1454     * integer on some systems.  foey! */
1455    for( flag = MAX_ATTR; flag; flag >>= 1 )
1456       if( flag & attr ) {
1457      if( flag == A_PRECIOUS)      Def_macro(".PRECIOUS",  "y", M_EXPANDED);
1458      else if( flag == A_SILENT)   Def_macro(".SILENT",    "y", M_EXPANDED);
1459      else if( flag == A_IGNORE )  Def_macro(".IGNORE",    "y", M_EXPANDED);
1460      else if( flag == A_EPILOG )  Def_macro(".EPILOG",    "y", M_EXPANDED);
1461      else if( flag == A_PROLOG )  Def_macro(".PROLOG",    "y", M_EXPANDED);
1462      else if( flag == A_NOINFER ) Def_macro(".NOINFER",   "y", M_EXPANDED);
1463      else if( flag == A_SEQ )     Def_macro(".SEQUENTIAL","y", M_EXPANDED);
1464      else if( flag == A_SHELL )   Def_macro(".USESHELL",  "y", M_EXPANDED);
1465      else if( flag == A_MKSARGS ) Def_macro(".MKSARGS",   "y", M_EXPANDED);
1466 #if !defined(__CYGWIN__)
1467      else if( flag == A_SWAP )    Def_macro(".SWAP",      "y", M_EXPANDED);
1468 #else
1469      else if( flag == A_WINPATH ) Def_macro(".WINPATH",   "y", M_EXPANDED);
1470 #endif
1471       }
1472
1473    attr &= ~A_GLOB;
1474    if( attr ) Warning( "Non global attribute(s) ignored" );
1475 }
1476
1477
1478
1479 static void
1480 _stick_at_head( cp, pq )/*
1481 ==========================
1482     Add the prerequisite list to the head of the existing prerequisite
1483     list */
1484
1485 CELLPTR cp;         /* cell for target node */
1486 CELLPTR pq;     /* list of prerequisites to add */
1487 {
1488    DB_ENTER( "_stick_at_head" );
1489
1490    if( pq->ce_link != NIL(CELL) ) _stick_at_head( cp, pq->ce_link );
1491    Add_prerequisite( cp, pq, TRUE, FALSE );
1492
1493    DB_VOID_RETURN;
1494 }
1495
1496
1497
1498 static t_attr
1499 _is_attribute( name )/*
1500 =======================
1501    Check the passed name against the list of valid attributes and return the
1502    attribute index if it is, else return 0, indicating the name is not a valid
1503    attribute.  The present attributes are defined in dmake.h as A_xxx #defines,
1504    with the corresponding makefile specification:  (note they must be named
1505    exactly as defined below)
1506
1507    Valid attributes are:  .IGNORE, .SETDIR=, .SILENT, .PRECIOUS, .LIBRARY,
1508                           .EPILOG, .PROLOG,  .LIBRARYM, .SYMBOL, .UPDATEALL,
1509               .USESHELL, .NOINFER, .PHONY, .SWAP/.WINPATH, .SEQUENTIAL
1510               .NOSTATE,  .MKSARGS, .IGNOREGROUP, .GROUP, .FIRST
1511               .EXECUTE, .ERRREMOVE
1512
1513    NOTE:  The strcmp's are OK since at most three are ever executed for any
1514           one attribute check, and that happens only when we can be fairly
1515           certain we have an attribute.  */
1516 char *name;
1517 {
1518    t_attr attr = 0;
1519
1520    DB_ENTER( "_is_attribute" );
1521
1522    if( *name++ == '.' )
1523       switch( *name )
1524       {
1525          case 'E':
1526         if( !strcmp(name, "EPILOG") )           attr = A_EPILOG;
1527         else if( !strcmp(name, "EXECUTE"))      attr = A_EXECUTE;
1528         else if( !strcmp(name, "ERRREMOVE"))    attr = A_ERRREMOVE;
1529         else attr = 0;
1530         break;
1531
1532      /* A_FIRST implies A_IGNORE, handled in ST_INCLUDE */
1533          case 'F':
1534         attr = (strcmp(name, "FIRST")) ? 0 : A_FIRST;
1535         break;
1536
1537      case 'G': attr = (strcmp(name, "GROUP"))    ? 0 : A_GROUP;   break;
1538          case 'L': attr = (strcmp(name, "LIBRARY"))  ? 0 : A_LIBRARY; break;
1539          case 'M': attr = (strcmp(name, "MKSARGS"))  ? 0 : A_MKSARGS; break;
1540
1541          case 'I':
1542         if( !strcmp(name, "IGNORE") )           attr = A_IGNORE;
1543         else if( !strcmp(name, "IGNOREGROUP"))  attr = A_IGNOREGROUP;
1544         else attr = 0;
1545         break;
1546
1547          case 'N':
1548         if( !strcmp(name, "NOINFER") )      attr = A_NOINFER;
1549         else if( !strcmp(name, "NOSTATE"))  attr = A_NOSTATE;
1550         else attr = 0;
1551         break;
1552
1553          case 'U':
1554         if( !strcmp(name, "UPDATEALL") )    attr = A_UPDATEALL;
1555         else if( !strcmp(name, "USESHELL")) attr = A_SHELL;
1556         else attr = 0;
1557         break;
1558
1559          case 'P':
1560             if( !strcmp(name, "PRECIOUS") )     attr = A_PRECIOUS;
1561             else if( !strcmp(name, "PROLOG") )  attr = A_PROLOG;
1562             else if( !strcmp(name, "PHONY") )   attr = A_PHONY;
1563             else attr = 0;
1564             break;
1565
1566          case 'S':
1567             if( !strncmp(name, "SETDIR=", 7) )    attr = A_SETDIR;
1568             else if( !strcmp(name, "SILENT") )    attr = A_SILENT;
1569             else if( !strcmp(name, "SYMBOL") )    attr = A_SYMBOL;
1570             else if( !strcmp(name, "SEQUENTIAL")) attr = A_SEQ;
1571         /* A_SWAP has no meaning except for MSDOS. */
1572             else if( !strcmp(name, "SWAP"))       attr = A_SWAP;
1573             else attr = 0;
1574             break;
1575
1576          case 'W': attr = (strcmp(name, "WINPATH"))  ? 0 : A_WINPATH; break;
1577       }
1578
1579    DB_RETURN( attr );
1580 }
1581
1582
1583
1584 static int
1585 _is_special( tg )/*
1586 ===================
1587    This function returns TRUE if the name passed in represents a special
1588    target, otherwise it returns false.  A special target is one that has
1589    a special meaning to dmake, and may require processing at the time that
1590    it is parsed.
1591
1592    Current Special targets are:
1593     .GROUPPROLOG    .GROUPEPILOG    .INCLUDE    .IMPORT
1594     .EXPORT     .SOURCE     .SUFFIXES   .ERROR        .EXIT
1595     .INCLUDEDIRS    .MAKEFILES  .REMOVE     .KEEP_STATE
1596     .TARGETS    .ROOT
1597 */
1598 char *tg;
1599 {
1600    DB_ENTER( "_is_special" );
1601
1602    if( *tg++ != '.' ) DB_RETURN( 0 );
1603
1604    switch( *tg )
1605    {
1606       case 'E':
1607          if( !strcmp( tg, "ERROR" ) )       DB_RETURN( ST_REST     );
1608          else if( !strcmp( tg, "EXPORT" ) ) DB_RETURN( ST_EXPORT   );
1609          else if( !strcmp( tg, "EXIT" ) )   DB_RETURN( ST_EXIT     );
1610      break;
1611
1612       case 'G':
1613      if( !strcmp( tg, "GROUPPROLOG" ))      DB_RETURN( ST_REST     );
1614      else if( !strcmp( tg, "GROUPEPILOG" )) DB_RETURN( ST_REST     );
1615      break;
1616
1617       case 'I':
1618          if( !strcmp( tg, "IMPORT" ) )      DB_RETURN( ST_IMPORT   );
1619          else if( !strcmp( tg, "INCLUDE" ) )    DB_RETURN( ST_INCLUDE  );
1620      else if( !strcmp( tg, "INCLUDEDIRS" )) DB_RETURN( ST_REST     );
1621      break;
1622
1623       case 'K':
1624          if( !strcmp( tg, "KEEP_STATE" ) )  DB_RETURN( ST_KEEP     );
1625      break;
1626
1627       case 'M':
1628          if( !strcmp( tg, "MAKEFILES" ) )   DB_RETURN( ST_REST     );
1629      break;
1630
1631       case 'R':
1632          if( !strcmp( tg, "REMOVE" ) )      DB_RETURN( ST_REST     );
1633          else if( !strcmp( tg, "ROOT" ) )   DB_RETURN( ST_REST     );
1634      break;
1635
1636       case 'S':
1637          if( !strncmp( tg, "SOURCE", 6 ) )  DB_RETURN( ST_SOURCE   );
1638          else if( !strncmp(tg, "SUFFIXES", 8 )) {
1639             if  (Verbose & V_WARNALL)
1640                Warning( "The .SUFFIXES target has no special meaning and is deprecated." );
1641             DB_RETURN( ST_SOURCE   );
1642      }
1643      break;
1644
1645       case 'T':
1646          if( !strcmp( tg, "TARGETS" ) )     DB_RETURN( ST_REST     );
1647      break;
1648    }
1649
1650    DB_RETURN( 0 );
1651 }
1652
1653
1654
1655 static int
1656 _is_percent( np )/*
1657 ===================
1658     return TRUE if np points at a string containing a % sign */
1659 char *np;
1660 {
1661    return( (strchr(np,'%') && (*np != '\'' && np[strlen(np)-1] != '\'')) ?
1662        TRUE : FALSE );
1663 }
1664
1665
1666 static char *
1667 _is_magic( np )/*
1668 =================
1669    return NULL if np does not points at a string of the form
1670       .<chars>.<chars>  or  .<chars>
1671    where chars are "visible characters" for the current locale. If np is of the
1672    first form we return a pointer to the second '.' and for the second form we
1673    return a pointer to the '.'.
1674
1675    NOTE:  reject target if it contains / or begins with ..
1676           reject also .INIT and .DONE because they are mentioned in the
1677           man page. */
1678 char *np;
1679 {
1680    register char *n;
1681
1682    n = np;
1683    if( *n != '.' ) return( NIL(char) );
1684    if (strchr(DirBrkStr, *(n+1))!=NULL || *(n+1) == '.' )
1685       return (NIL(char));
1686    if( !strcmp( n+1, "INIT" ) || !strcmp( n+1, "DONE" ) )
1687       return (NIL(char));
1688
1689    for( n++; isgraph(*n) && (*n != '.'); n++ );
1690
1691    if( *n != '\0' ) {
1692       if( *n != '.' )  return( NIL(char) );
1693       for( np = n++; isgraph( *n ) && (*n != '.'); n++ );
1694       if( *n != '\0' ) return( NIL(char) );
1695    }
1696    /* Until dmake 4.5 a .<suffix> target was ignored when AUGMAKE was
1697     * set and evaluated as a meta target if unset (also for -A).
1698     * To keep maximum compatibility accept this regardles of the AUGMAKE
1699     * status. */
1700
1701    /* np points at the second . of .<chars>.<chars> string.
1702     * if the special target is of the form .<chars> then np points at the
1703     * first . in the token. */
1704
1705    return( np );
1706 }
1707
1708
1709 static int
1710 _add_root(tg)/*
1711 ===============
1712    Adds "tg" to the prerequisits list of "Targets" if "Target" is not TRUE,
1713    i.e. to the list of targets that are to be build.
1714    Instead io setting "Target" to TRUE, TRUE is returned as more targets
1715    might be defined in the current makefile line and they all have to be
1716    add to "Targets" in this case.  */
1717
1718 CELLPTR tg;
1719 {
1720    int res = FALSE;
1721
1722    if(tg == Targets)
1723       return(TRUE);
1724
1725    if( !Target && !(tg->ce_flag & (F_SPECIAL|F_PERCENT)) ) {
1726       Add_prerequisite(Targets, tg, FALSE, TRUE);
1727
1728       tg->ce_flag |= F_TARGET;
1729       tg->ce_attr |= A_FRINGE;
1730       res          = TRUE;
1731    }
1732
1733    return(res);
1734 }