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 #if 0
 455       /* Check to see if we had a rule of the form '%.o : a.h b.h ; xxx'
 456        * In which case we must build a NULL prq node to hold the recipe */
 457       if( _sv_globprq_only && (_sv_rules != NIL(STRING)) )
 458          _build_graph( _sv_op, tg, NIL(CELL) );
 459 #endif
 460
 461       /* NOTE:  For targets that are magic or special we ignore any
 462        * previously defined rules, ie. We throw away the old definition
 463        * and use the new, otherwise we complain. */
 464       if( !(tg->ce_flag & F_MULTI) && !magic && (tg->CE_RECIPE != NIL(STRING))
 465           && !_sp_target && (_sv_rules != NIL(STRING)) )
 466          Fatal( "Multiply defined recipe for target %s", tg->CE_NAME );
 467
 468       if( (magic || _sp_target) && (_sv_rules == NIL(STRING)) &&
 469           !(tg->ce_flag & F_SPECIAL) && !_sv_globprq_only )
 470          Warning( "Empty recipe for special or meta target %s", tg->CE_NAME );
 471
 472       if( magic ) {
 473          CELLPTR ep;
 474
 475          for( ep=_sv_edgel; ep != NIL(CELL); ep=ep->ce_link ) {
 476             DB_PRINT( "par", ("ep address: %#x", ep) );
 477             /* %.xx :| '%.yy' abc xx '%.tt' ; touch $@
 478              * loops here ... */
 479             _set_attributes( _sv_attr, _sv_setdir, ep );
 480             ep->ce_flag |= (F_TARGET|flag);
 481
 482             if( _sv_rules != NIL(STRING) ) {
 483                ep->ce_recipe  = _sv_rules;
 484                ep->ce_indprq  = _sv_ind_prq;
 485             }
 486          }
 487       }
 488       else {
 489          tg->ce_attr |= _sv_attr;
 490          tg->ce_flag |= flag;
 491
 492          if( _sv_rules != NIL(STRING) ) {
 493             tg->ce_recipe  = _sv_rules;
 494             tg->ce_flag   |= F_RULES | F_TARGET;
 495
 496             /* Bind the current set of prerequisites as belonging to the
 497              * original recipe given for the target */
 498             for( lp=tg->ce_prq; lp != NIL(LINK); lp = lp->cl_next )
 499                   if( !(lp->cl_flag & F_VISITED) ) lp->cl_flag |= F_TARGET;
 500          }
 501          else for( lp=tg->ce_prq; lp != NIL(LINK); lp = lp->cl_next )
 502             lp->cl_flag |= F_VISITED;
 503       }
 504
 505       tflag |= _add_root(tg);
 506    }
 507
 508    if( tflag ) Target = TRUE;
 509    if( _sv_setdir ) FREE(_sv_setdir);
 510    _sv_rules   = NIL(STRING);
 511    _sv_crule   = NIL(STRING);
 512    _sv_targets = NIL(CELL);
 513    _sv_ind_prq = NIL(LINK);
 514    _sv_edgel   = NIL(CELL);
 515    _sp_target  = FALSE;
 516    _sv_globprq_only = 0;
 517
 518    DB_VOID_RETURN;
 519 }
 520
 521
 522
 523 PUBLIC int
 524 Set_group_attributes( list )/*
 525 ==============================
 526         Scan list looking for the standard @,-,% and + (as in recipe line
 527         defs) (+ is set but ignored for group recipes)
 528         and set the flags accordingly so that they apply when we bind the
 529         rules to the appropriate targets.
 530         Return TRUE if group recipe start '[' was found, otherwise FALSE.  */
 531 char *list;
 532 {
 533    int res = FALSE;
 534    char *s;
 535
 536    if ( !((_sv_attr|Glob_attr)&A_IGNOREGROUP) ) {
 537       s = DmStrSpn(list,"@-%+ \t");
 538       res = (*s == '[');
 539       if( res ) {
 540          /* Check for non-white space characters after the [. */
 541          for( s++; *s && iswhite(*s) ; s++ )
 542             ;
 543          if( *s )
 544             Warning("Found non-white space character after '[' in [%s].", list);
 545
 546          _sv_attr |= Rcp_attribute(list);
 547       }
 548    }
 549
 550    return(res);
 551 }
 552
 553
 554 static void
 555 _do_special( special, op, attr, set_dir, target, prereq, state )/*
 556 ==================================================================
 557    Process a special target (always only a single target).  So far the only
 558    special targets we have are those recognized by the _is_special function.
 559    Some of the special targets can take recipes, they call _do_targets()
 560    and (implicitly) set *state to to RULE_SCAN. Otherwise *state remains
 561    unaffected, i.e. NORMAL_SCAN.
 562
 563    target is always only a single special target.
 564
 565    NOTE:  For the cases of .IMPORT, and .INCLUDE, the cells created by the
 566           parser are never freed.  This is due to the fact that it is too much
 567           trouble to get them out of the hash table once they are defined, and
 568           if they are per chance used again it will be ok, anyway, since the
 569           cell is not really used by the code below.  */
 570
 571 int     special;
 572 int     op;
 573 t_attr  attr;
 574 char    *set_dir;
 575 CELLPTR target;
 576 CELLPTR prereq;
 577 int     *state;
 578 {
 579    HASHPTR      hp;             /* pointer to macro def cell            */
 580    CELLPTR      cp;             /* temporary pointer into cells list    */
 581    CELLPTR      dp;             /* pointer to directory dir cell        */
 582    LINKPTR      lp;             /* pointer at prerequisite list         */
 583    char         *dir;           /* current dir to prepend               */
 584    char         *path;          /* resulting path to try to read        */
 585    char         *name;          /* File name for processing a .INCLUDE  */
 586    char         *tmp;           /* temporary string pointer             */
 587    FILE         *fil;           /* File descriptor returned by Openfile */
 588
 589    DB_ENTER( "_do_special" );
 590
 591    target->ce_flag = F_SPECIAL; /* mark the target as special */
 592
 593    switch( special ) {
 594       case ST_EXPORT:
 595          for( ; prereq != NIL(CELL); prereq = prereq->ce_link ) {
 596             DB_PRINT( "par", ("Exporting [%s]", prereq->CE_NAME) );
 597             hp = GET_MACRO( prereq->CE_NAME );
 598
 599             if( hp != NIL(HASH) ) {
 600                char *tmpstr = hp->ht_value;
 601
 602                if( tmpstr == NIL(char) ) tmpstr = "";
 603
 604                if( Write_env_string( prereq->CE_NAME, tmpstr ) != 0 )
 605                   Warning( "Could not export %s", prereq->CE_NAME );
 606             }
 607          }
 608          break;
 609
 610       /* Simply cause the parser to fail on the next input read */
 611       case ST_EXIT:
 612          Skip_to_eof = TRUE;
 613          break;
 614
 615       case ST_IMPORT:
 616          for( ; prereq != NIL(CELL); prereq = prereq->ce_link ) {
 617             char *tmpstr;
 618
 619             DB_PRINT( "par", ("Importing [%s]", prereq->CE_NAME) );
 620
 621             if( strcmp(prereq->CE_NAME, ".EVERYTHING") == 0 ) {
 622                t_attr sattr = Glob_attr;
 623                Glob_attr |= A_SILENT;
 624
 625                ReadEnvironment();
 626
 627                Glob_attr = sattr;
 628             }
 629             else {
 630                tmpstr = Read_env_string( prereq->CE_NAME );
 631
 632                if( tmpstr != NIL(char) )
 633                   Def_macro(prereq->CE_NAME, tmpstr, M_EXPANDED|M_LITERAL);
 634                else
 635                   if( !((Glob_attr | attr) & A_IGNORE) )
 636                      Fatal("Imported macro `%s' not found",prereq->CE_NAME);
 637             }
 638          }
 639
 640          attr &= ~A_IGNORE;
 641          break;
 642
 643       case ST_INCLUDE:
 644       {
 645          int pushed     = FALSE;
 646          int first      = (attr & A_FIRST);
 647          int ignore     = (((Glob_attr | attr) & A_IGNORE) != 0);
 648          int found      = FALSE;
 649          int noinf      = (attr & A_NOINFER);
 650          LINKPTR prqlnk = NIL(LINK);
 651          LINKPTR prqlst = NIL(LINK);
 652
 653          if( prereq == NIL(CELL) )  Fatal( "No .INCLUDE file(s) specified" );
 654
 655          dp = Def_cell( ".INCLUDEDIRS" );
 656
 657          if( (attr & A_SETDIR) && *(dir = strchr(set_dir, '=')+1) )
 658             pushed = Push_dir( dir, ".INCLUDE", ignore );
 659
 660          for( cp=prereq; cp != NIL(CELL); cp = cp->ce_link ) {
 661             LINKPTR ltmp;
 662             TALLOC(ltmp, 1, LINK);
 663             ltmp->cl_prq = cp;
 664
 665             if( prqlnk == NIL(LINK) )
 666                prqlst = ltmp;
 667             else
 668                prqlnk->cl_next = ltmp;
 669
 670             prqlnk = ltmp;
 671          }
 672
 673          for( ; prqlst != NIL(LINK); FREE(prqlst), prqlst=prqlnk ) {
 674             prqlnk = prqlst->cl_next;
 675             cp     = prqlst->cl_prq;
 676             name   = cp->CE_NAME;
 677
 678             /* Leave this here, it ensures that prqlst gets propely free'd */
 679             if ( first && found )
 680                continue;
 681
 682             if( *name == '<' ) {
 683                /* We have a file name enclosed in <....>
 684                 * so get rid of the <> arround the file name */
 685
 686                name++;
 687                if( (tmp = strrchr( name, '>' )) != NIL( char ) )
 688                   *tmp = 0;
 689
 690                if( If_root_path( name ) )
 691                   fil = Openfile( name, FALSE, FALSE );
 692                else
 693                   fil = NIL(FILE);
 694             }
 695             else
 696                fil = Openfile( name, FALSE, FALSE );
 697
 698             if( fil == NIL(FILE) && !If_root_path( name ) ) { /*if true ==> not found in current dir*/
 699
 700                /* Now we must scan the list of prerequisites for .INCLUDEDIRS
 701                 * looking for the file in each of the specified directories.
 702                 * if we don't find it then we issue an error.  The error
 703                 * message is suppressed if the .IGNORE attribute of attr is
 704                 * set.  If a file is found we call Parse on the file to
 705                 * perform the parse and then continue on from where we left
 706                 * off.  */
 707
 708                for(lp=dp->CE_PRQ; lp && fil == NIL(FILE); lp=lp->cl_next) {
 709                   dir  = lp->cl_prq->CE_NAME;
 710                   if( strchr(dir, '$') ) dir = Expand(dir);
 711                   path = Build_path( dir, name );
 712
 713                   DB_PRINT( "par", ("Trying to include [%s]", path) );
 714
 715                   fil = Openfile( path, FALSE, FALSE );
 716                   if( dir != lp->cl_prq->CE_NAME ) FREE(dir);
 717                }
 718             }
 719
 720             if (!noinf && fil == NIL(FILE)) {
 721                t_attr glob = Glob_attr;
 722                t_attr cattr = prqlst->cl_prq->ce_attr;
 723
 724                prqlst->cl_next = NIL(LINK);
 725                Glob_attr |= (attr&A_IGNORE);
 726                prqlst->cl_prq->ce_attr &= ~A_FRINGE;
 727
 728                if( Verbose & V_FILE_IO )
 729                   printf( "%s:  Inferring include file [%s].\n",
 730                           Pname, name );
 731                fil = TryFiles(prqlst);
 732
 733                Glob_attr = glob;
 734                prqlst->cl_prq->ce_attr |= (cattr & A_FRINGE);
 735             }
 736
 737             if( fil != NIL(FILE) ) {
 738                if( Verbose & V_FILE_IO )
 739                   printf( "%s:  Parsing include file [%s].\n",
 740                           Pname, name );
 741                Parse( fil );
 742                found = TRUE;
 743             }
 744             else if( !(ignore || first) )
 745                Fatal( "Include file %s, not found", name );
 746             else if( Verbose & V_FILE_IO )
 747                printf( "%s:  Include file [%s] was not found.\n",
 748                           Pname, name );
 749          }
 750
 751          if ( !ignore && first && !found )
 752             Fatal( "No include file was found" );
 753
 754          if( pushed ) Pop_dir(FALSE);
 755          attr &= ~(A_IGNORE|A_SETDIR|A_FIRST|A_NOINFER);
 756       }
 757       break;
 758
 759       case ST_SOURCE:
 760          if( prereq != NIL(CELL) )
 761             _do_targets( op & (R_OP_CL | R_OP_MI | R_OP_UP), attr, set_dir,
 762                          target, prereq );
 763          else {
 764             /* The old semantics of .SOURCE were that an empty list of
 765              * prerequisites clears the .SOURCE list.  So we must implement
 766              * that here as a clearout prerequisite operation.  Since this is
 767              * a standard operation with the :- opcode we can simply call the
 768              * proper routine with the target cell and it should do the trick
 769              */
 770
 771             if( op == R_OP_CL || (op & R_OP_MI) )
 772                Clear_prerequisites( target );
 773          }
 774
 775          op &= ~(R_OP_MI | R_OP_UP);
 776          break;
 777
 778       case ST_KEEP:
 779          if( Keep_state != NIL(char) ) break;
 780          Def_macro( ".KEEP_STATE", "_state.mk", M_EXPANDED );
 781          break;
 782
 783       case ST_REST:
 784          /* The rest of the special targets can all take recipes, as such they
 785           * must be able to affect the state of the parser. */
 786
 787          {
 788             int s_targ = Target;
 789
 790             Target     = TRUE;
 791             _sp_target = TRUE;
 792             *state     = _do_targets( op, attr, set_dir, target, prereq );
 793             Target     = s_targ;
 794
 795             target->ce_flag |= F_TARGET;
 796
 797             attr    = A_DEFAULT;
 798             op      = R_OP_CL;
 799          }
 800          break;
 801
 802       default:break;
 803    }
 804
 805    if( op   != R_OP_CL   ) Warning( "Modifier(s) for operator ignored" );
 806    if( attr != A_DEFAULT ) Warning( "Extra attributes ignored" );
 807
 808    DB_VOID_RETURN;
 809 }
 810
 811
 812
 813 static int
 814 _do_targets( op, attr, set_dir, targets, prereq )/*
 815 ===================================================
 816    Evaluate the values derived from the current target definition
 817    line. Helper functions _build_graph(), _do_magic(), _make_multi(),
 818    _add_root(), _replace_cell(), _set_attributes(), Clear_prerequisites()
 819    _stick_at_head(), Add_prerequisite() and _set_global_attr() are used.
 820    If successfull "_sv_targets" is set to "targets".
 821    Return RULE_SCAN if a recipe is expected to follow, otherwise
 822    NORMAL_SCAN. */
 823 int     op;             /* rule operator                           */
 824 t_attr  attr;           /* attribute flags for current targets     */
 825 char    *set_dir;       /* value of setdir attribute               */
 826 CELLPTR targets;        /* list of targets (each cell maybe already
 827                          * defined by a previous target definition
 828                          * line.  */
 829 CELLPTR prereq;         /* list of prerequisites                   */
 830 {
 831    CELLPTR      tg1;            /* temporary target pointer             */
 832    CELLPTR      tp1;            /* temporary prerequisite pointer       */
 833    LINKPTR      prev_cell;      /* pointer for .UPDATEALL processing    */
 834    char         *p;             /* temporary char pointer               */
 835    int          tflag = FALSE;  /* set to TRUE if we add target to root */
 836    int          ret_state = RULE_SCAN;  /* Return state */
 837
 838    DB_ENTER( "_do_targets" );
 839
 840    /* If .UPDATEALL is set sort the target list that was temporary linked
 841     * with ce_link into a list using ce_link with ce_set pointing to the first
 842     * element. */
 843    /* FIXME: Check that .UPDATEALL and %-targets on one line work together. */
 844    if( attr & A_UPDATEALL ) {
 845       if( targets == NIL(CELL) )
 846          Fatal( ".UPDATEALL attribute requires non-empty list of targets" );
 847
 848       if (targets->ce_set == NIL(CELL)) {
 849          for(
 850             prev_cell=CeMeToo(targets),tg1=targets->ce_link;
 851             tg1 != NIL(CELL);
 852             tg1=tg1->ce_link
 853          ) {
 854             if (tg1->ce_set)
 855                Fatal( "Target [%s] appears on multiple .UPDATEALL lists",
 856                       tg1->CE_NAME);
 857             tg1->ce_set = targets;
 858             TALLOC(prev_cell->cl_next, 1, LINK);
 859             prev_cell = prev_cell->cl_next;
 860             prev_cell->cl_prq = tg1;
 861          }
 862          targets->ce_set = targets;
 863       }
 864       else {
 865          LINKPTR ap;
 866          CELLPTR tp;
 867
 868          tp = targets;
 869          ap = CeMeToo(targets);
 870          while (ap && tp && ap->cl_prq == tp && tp->ce_set == targets) {
 871             ap = ap->cl_next;
 872             tp = tp->ce_link;
 873          }
 874          if (ap || tp)
 875             Fatal("Inconsistent .UPDATEALL lists for target [%s]",
 876                   targets->CE_NAME);
 877       }
 878       targets->ce_link = NIL(CELL);
 879    }
 880
 881    for( tg1 = targets; tg1 != NIL(CELL); tg1 = tg1->ce_link ) {
 882       /* Check if tg1 is already marked as a %-target, but not a magic
 883        * (.xxx.yyy) target.  */
 884       int purepercent = (tg1->ce_flag & F_PERCENT) && !(tg1->ce_flag & F_MAGIC);
 885
 886       /* Check each target.  Check for inconsistencies between :: and : rule
 887        * sets.  :: may follow either : or :: but not the reverse.
 888        *
 889        * Any F_MULTI target (contains :: rules) is represented by a prerequisite
 890        * list hanging off the main target cell where each of the prerequisites
 891        * is a copy of the target cell but is not entered into the hash table.
 892        */
 893       if( !(op & R_OP_DCL ) && (tg1->ce_flag & F_MULTI) && !purepercent )
 894          Fatal( "':' vs '::' inconsistency in rules for %s", tg1->CE_NAME );
 895
 896       if( purepercent ) {
 897          /* Handle %-targets. */
 898          CELLPTR cur;
 899          CELLPTR tpq = NIL(CELL);
 900          CELLPTR nprq;
 901
 902 #ifdef DBUG
 903          DB_PRINT( "%", ("Handling %%-target [%s : : <prerequisites follow, maybe empty>]",
 904                          tg1->CE_NAME) );
 905          for(cur=prereq;cur;cur=cur->ce_link) {
 906             DB_PRINT( "%", ("         %%-prerequisites : %s ",
 907                             cur->CE_NAME ? cur->CE_NAME : "<empty>") );
 908          }
 909 #endif
 910
 911          /* Handle indirect (global) prerequisites first. */
 912          for(cur=prereq;cur;cur=cur->ce_link) {
 913             char *name = cur->CE_NAME;
 914             int   len  = strlen(name);
 915
 916             if( *name == '\'' && name[len-1]=='\'' ){
 917                name[len-1] = '\0';
 918                strcpy(name,name+1);
 919                /* add indirect prerequisite */
 920                _add_indirect_prereq( cur );
 921             }
 922             else {
 923                /* Sort all "other" prerequisits into tpq, with nprq
 924                 * pointing to the first element. */
 925                if (tpq)
 926                   tpq->ce_link = cur;
 927                else
 928                   nprq = cur;
 929                tpq = cur;
 930             }
 931          }
 932          /* Mark the last element of nprq. */
 933          if(tpq)
 934             tpq->ce_link=NIL(CELL);
 935          else
 936             nprq = NIL(CELL);
 937
 938          /* Handle "normal" prerequisites now. */
 939
 940          if ( op & R_OP_OR ) {
 941             /* for op == ':|' transform:
 942              * <%-target> :| <prereq_1> ... <prereq_n> ; <recipe>
 943              * into:
 944              * <%-target> : <prereq_1> ; <recipe>
 945              * ..
 946              * <%-target> : <prereq_n> ; <recipe>
 947              */
 948             for(tp1=nprq; tp1; tp1=tp1->ce_link) {
 949                CELLPTR tmpcell = tp1->ce_link;
 950                tp1->ce_link = NIL(CELL);
 951                _build_graph(op,tg1,tp1);
 952                tp1->ce_link = tmpcell;
 953             }
 954          }
 955          else {
 956             /* The inference mechanism for %-targets limits the number of
 957              * (non-indirect) prerequisite to one, but an unlimited number
 958              * of indirect prerequisites is possible. */
 959             if ( nprq && nprq->ce_link && !(op & R_OP_OR))
 960                Warning("More than one prerequisite\n"
 961                "for %%-target. Use :| ruleop or indirect prerequisites.");
 962
 963             _build_graph(op,tg1,nprq);
 964          }
 965       }
 966       else if( tg1->ce_flag & F_MAGIC &&
 967                (p = _is_magic( tg1->CE_NAME )) != NIL(char) &&
 968                _do_magic( op, p, tg1, prereq, attr, set_dir ) )
 969         ; /* _do_magic() does all that is needed (if return value is TRUE). */
 970       else if( op & R_OP_DCL ) {  /* op == :: */
 971          CELLPTR tmp_cell = _make_multi(tg1);
 972
 973          /* Add the F_MULTI master to .TARGETS (If not set already).
 974           * Do this here so that the member cell is not added instead
 975           * when the recipies are bound in Bind_rules_to_targets(). */
 976          tflag |= _add_root(tg1);
 977
 978          /* Replace the F_MULTI master with the member cell. */
 979          targets = _replace_cell( targets, tg1, tmp_cell );
 980
 981         /* We have to set (add) the attributes also for the F_MULTI master
 982          * target cell. As there is no recipe the setdir value is not
 983          * needed. _set_attributes() that follows in approx. 8 lines
 984          * will set the attributes for the F_MULTI member cell.  */
 985          tg1->ce_attr |= (attr & ~A_SETDIR);
 986
 987          /* Now switch tg1 to the current (F_MULTI prereq.) target.
 988           * All recipes have to be added to that cell and not to the
 989           * F_MULTI master.  */
 990          tg1 = tmp_cell;
 991       }
 992
 993       if( !purepercent ) _set_attributes( attr, set_dir, tg1 );
 994
 995       /* Build the proper prerequisite list of the target.  If the `-',
 996        * modifier was used clear the prerequisite list before adding any
 997        * new prerequisites.  Else add them to the head/tail as appropriate.
 998        *
 999        * If the target has F_PERCENT set then no prerequisites are used. */
1000
1001       if( !(tg1->ce_flag & F_PERCENT) ) {
1002          if( op & R_OP_MI ) Clear_prerequisites( tg1 ); /* op == :- */
1003
1004          if( (op & R_OP_UP) && (tg1->ce_prq != NIL(LINK)) ) /* op == :^ */
1005             _stick_at_head( tg1, prereq );
1006          else for( tp1=prereq; tp1 != NIL(CELL); tp1 = tp1->ce_link )
1007             Add_prerequisite( tg1, tp1, FALSE, FALSE );
1008       }
1009       else if( op & (R_OP_MI | R_OP_UP) )
1010          Warning( "Modifier(s) `^-' for %-meta target ignored" );
1011    }
1012
1013    /* In case a F_MULTI member that was the first prerequisite of .TARGETS */
1014    if(tflag)
1015       Target = TRUE;
1016
1017    /* Check to see if we have NO targets but some attributes, i.e. an
1018     * Attribute-Definition.  If so then apply all of the attributes to the
1019     * complete list of prerequisites.  No recipes are allowed to follow. */
1020
1021    if( (targets == NIL(CELL)) && attr ) {
1022       ret_state = NORMAL_SCAN;
1023       if( prereq != NIL(CELL) )
1024          for( tp1=prereq; tp1 != NIL(CELL); tp1 = tp1->ce_link )
1025             _set_attributes( attr, set_dir, tp1 );
1026       else
1027          _set_global_attr( attr );
1028    }
1029
1030    /* Now that we have built the lists of targets, the parser must parse the
1031     * recipes if there are any.  However we must start the recipe list with the
1032     * recipe specified as via the ; kludge, if there is one */
1033    _sv_targets = targets;
1034    _sv_attr    = attr;
1035    _sv_flag    = ((op & R_OP_BG) ? F_SINGLE : F_DEFAULT);
1036
1037    DB_RETURN( ret_state );
1038 }
1039
1040
1041 static int
1042 _do_magic( op, dot, target, prereq, attr, set_dir )/*
1043 =====================================================
1044    This function investigates dot for being a magic target of the form
1045    .<chars>.<chars> or .<chars> and creates the appropriate % rules for
1046    that target.
1047    If the target is given with an undefined syntax, i.e. with prerequisites,
1048    then this function terminates early without creating % rules and
1049    returns 0.
1050    If successful the function returns 1.
1051
1052    The function builds the % rule, `%.o : %.c'  from .c.o, and
1053    `% : %.a' from .a */
1054
1055 int     op;
1056 char    *dot;
1057 CELLPTR target;
1058 CELLPTR prereq;
1059 t_attr  attr;
1060 char    *set_dir;
1061 {
1062    CELLPTR tg;
1063    CELLPTR prq;
1064    char    *tmp, *tmp2;
1065
1066    DB_ENTER( "_do_magic" );
1067
1068    DB_PRINT("%", ("Analysing magic target [%s]", target->CE_NAME));
1069
1070    if( prereq != NIL(CELL) ) {
1071       Warning( "Ignoring AUGMAKE meta-target [%s] because prerequisites are present.", target->CE_NAME );
1072       DB_RETURN(0);
1073    }
1074
1075    if( dot == target->CE_NAME ) {    /* its of the form .a */
1076       tg  = Def_cell( "%" );
1077       tmp = _build_meta( target->CE_NAME );
1078       prq = Def_cell( tmp );
1079       FREE( tmp );
1080
1081       _build_graph( op, tg, prq );
1082    }
1083    else {
1084       tmp = _build_meta( dot );
1085       tg  = Def_cell( tmp );
1086       FREE( tmp );
1087
1088       tmp = _build_meta( tmp2 = DmSubStr( target->CE_NAME, dot ) );
1089       prq = Def_cell( tmp );
1090       FREE( tmp  );
1091       FREE( tmp2 );
1092
1093       _build_graph( op, tg, prq );
1094    }
1095
1096    tg->ce_flag      |= F_PERCENT;
1097    target->ce_flag  |= (F_MAGIC|F_PERCENT);
1098
1099    _set_attributes( attr, set_dir, tg );
1100
1101    DB_RETURN(1);
1102 }
1103
1104
1105 static CELLPTR
1106 _replace_cell( lst, cell, rep )/*
1107 =================================
1108    Replace cell with rep in lst. Note if cell is not part of lst we are in
1109    real trouble. */
1110 CELLPTR lst;
1111 CELLPTR cell;
1112 CELLPTR rep;
1113 {
1114    register CELLPTR tp;
1115
1116    if( lst == cell ) {
1117       rep->ce_link = lst->ce_link;
1118       lst = rep;
1119    }
1120    else {
1121       for( tp=lst; tp->ce_link != cell && tp ; tp=tp->ce_link );
1122       if( !tp )
1123          Fatal( "Internal Error: cell not part of lst." );
1124       rep->ce_link = tp->ce_link->ce_link;
1125       tp->ce_link = rep;
1126    }
1127
1128    return(lst);
1129 }
1130
1131
1132 static char *
1133 _build_meta( name )/*
1134 =====================
1135    Check to see if the name is of the form .c~ if so and if Augmake
1136    translation is enabled then return s.%.c, else return %.suff, where if the
1137    suffix ends in '~' then leave it be.*/
1138 char *name;
1139 {
1140    char *tmp;
1141    int  test = (STOBOOL(Augmake) ? name[strlen(name)-1] == '~' : 0);
1142
1143    tmp = DmStrJoin( test ? "s.%" : "%", name, -1, FALSE);
1144    if( test ) tmp[ strlen(tmp)-1 ] = '\0';
1145
1146    return(tmp);
1147 }
1148
1149
1150 static CELLPTR
1151 _build_graph( op, target, prereq )/*
1152 ====================================
1153    This function is called to build the graph for the % rule given by
1154    target : prereq cell combination.  This function assumes that target
1155    is a % target and that prereq is one or multiple non-indirect prerequisite.
1156    It also assumes that target cell has F_PERCENT set already.
1157
1158    NOTE: If more than one prerequisite is present this function handles them
1159    correctly but the lookup still only uses the first (BUG!).
1160
1161    R_OP_CL (:) rules replace existing rules if any, %.o :: %.c is meaningless.
1162
1163    The function always returns NIL(CELL). */
1164 int op;
1165 CELLPTR target;
1166 CELLPTR prereq;
1167 {
1168    LINKPTR edl;
1169    CELLPTR edge = 0;
1170    CELLPTR tpq,cur;
1171    int match;
1172
1173 #ifdef DBUG
1174    DB_ENTER( "_build_graph" );
1175    DB_PRINT( "%", ("Building graph for [%s : <prerequisites follow, maybe empty>]",
1176                    target->CE_NAME) );
1177    for(tpq=prereq;tpq;tpq=tpq->ce_link) {
1178       DB_PRINT( "%", ("         %%-prerequisites : %s ",
1179                       tpq->CE_NAME ? tpq->CE_NAME : "<empty>") );
1180    }
1181 #endif
1182
1183    /* Currently multiple prerequisites are not (yet) handled correctly.
1184     * We already issue a warning in _do_targets(), don't issue it here
1185     * again.
1186    if ( prereq && prereq->ce_link )
1187       Warning( "Internal Error: more than one prerequisite in _build_graph." );
1188     */
1189
1190    /* There cannot be more than one target name ( linked with
1191     * (CeMeToo(target))->cl_next ) per %-target master.
1192     * FIXME: remove this check after verifying that it never triggers. */
1193    if ( (CeMeToo(target))->cl_next )
1194       Fatal( "Internal Error: more than one target name in _build_graph." );
1195
1196    /* Search the list of prerequisites for the current target and see if
1197     * any of them match the current %-meta's : prereq's pair.  NOTE that
1198     * %-metas are built as if they were F_MULTI targets, i.e. the target
1199     * definitions for the %-target members are stored in the prerequisites
1200     * list of the master target. */
1201    /* This relies on target->ce_prq being NULL if this is the first
1202     * occurence of this %-target and therefore not yet having a %-target
1203     * master. */
1204    match = FALSE;
1205    for(edl=target->ce_prq; !match && edl != NIL(LINK); edl=edl->cl_next) {
1206       LINKPTR l1,l2;
1207       edge = edl->cl_prq;
1208
1209       DB_PRINT("%", ("Trying to match [%s]",edge?edge->CE_NAME:"(nil)"));
1210
1211       /* First we match the target sets, if this fails then we don't have to
1212        * bother with the prerequisite sets.  The targets sets are sorted.
1213        * this makes life very simple. */
1214       /* ce_dir is handled per member target, no check needed for the
1215        * master target. */
1216
1217       /* FIXME: We already checked above that there is only one target
1218        * name. Remove the comparisons for following names. */
1219       l1 = CeMeToo(target); /* Used by .UPDATEALL !!! */
1220       l2 = CeMeToo(edge);
1221       while(l1 && l2 && l1->cl_prq == l2->cl_prq) {
1222          l1=l1->cl_next;
1223          l2=l2->cl_next;
1224       }
1225       /* If both l1 and l2 are NULL we had a match. */
1226       if (l1 || l2)
1227          continue;
1228
1229       /* target sets match, so check prerequisites. */
1230       if(    (!edge->ce_prq && !prereq) /* matches both empty - separate this. */
1231           || (   edge->ce_prq
1232               && (   edge->ce_dir == _sv_setdir
1233                   || (   edge->ce_dir
1234                       && _sv_setdir
1235                       && !strcmp(edge->ce_dir,strchr(_sv_setdir,'=')+1)
1236                      )
1237                  )
1238              )
1239       ) {
1240          LINKPTR prql;
1241
1242          /* this is a really gross way to compare two sets, it's n^2 but
1243           * since the sets are assumed to always be tiny, it should be ok. */
1244          for(tpq=prereq; tpq; tpq=tpq->ce_link) {
1245             for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1246                if (prql->cl_prq == tpq)
1247                   break;
1248
1249             if(prql == NIL(LINK))
1250                break;
1251
1252             prql->cl_prq->ce_flag |= F_MARK;
1253          }
1254
1255          if (tpq == NIL(CELL)) {
1256             for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1257                if(!(prql->cl_prq->ce_flag & F_MARK))
1258                   break;
1259
1260             if(prql == NIL(LINK))
1261                 match = TRUE;
1262          }
1263
1264          /* clean up the mark bits. */
1265          for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1266             prql->cl_prq->ce_flag &= ~F_MARK;
1267       }
1268    }
1269
1270    if( match ) {
1271       /* match is TRUE hence, we found an edge joining the target and the
1272        * prerequisite so reset the new edge so that new values replace it. */
1273       DB_PRINT( "%", ("It's an old edge") );
1274
1275       edge->ce_dir    = NIL(char);
1276       edge->ce_flag  &= (F_PERCENT|F_MAGIC|F_DFA);
1277       edge->ce_attr  &= A_NOINFER;
1278    }
1279    else {
1280       DB_PRINT( "%", ("Adding a new edge") );
1281
1282       edge = _make_multi(target);
1283
1284       /* FIXME: There can be only one %-target. */
1285       for(edl=CeMeToo(target);edl;edl=edl->cl_next) {
1286          if( !((tpq=edl->cl_prq)->ce_flag & F_DFA) ) {
1287             Add_nfa( tpq->CE_NAME );
1288             tpq->ce_flag |= F_DFA;
1289          }
1290
1291          edl->cl_prq->ce_set = edge;
1292       }
1293
1294       edge->ce_all = target->ce_all;
1295       target->ce_all.cl_next = NIL(LINK);
1296       target->ce_set = NIL(CELL);
1297
1298       /* Add all prerequisites to edge. */
1299       for(tpq=prereq; tpq; tpq=tpq->ce_link)
1300          Add_prerequisite(edge, tpq, FALSE, TRUE);
1301    }
1302
1303    if( op & R_OP_DCL )
1304    Warning("'::' operator for meta-target '%s' ignored, ':' operator assumed.",
1305            target->CE_NAME );
1306
1307    /* If edge was already added we're in BIG trouble. */
1308    /* Re-use cur as temporary variable. */
1309    for( cur=_sv_edgel; cur != NIL(CELL); cur=cur->ce_link ) {
1310       if( cur == edge )
1311          Fatal( "Internal Error: edge already in _sv_edgel." );
1312    }
1313
1314    edge->ce_link = _sv_edgel;
1315    _sv_edgel = edge;
1316    _sv_globprq_only = 0;
1317
1318    DB_RETURN(NIL(CELL));
1319 }
1320
1321
1322 static CELLPTR
1323 _make_multi( tg )/*
1324 ===================
1325    This function is called to convert tg into an F_MULTI target.
1326    Return a pointer to the new member cell.
1327    I don't know what the author intended but the ce_index entry is only
1328    used in this function (set to 0 for added targets) and undefined otherwise!
1329    The undefined value is hopefully set to 0 by the C compiler as each added
1330    target sets its ce_count to ++ce_index (==1). (FIXME) */
1331 CELLPTR tg;
1332 {
1333    CELLPTR cp;
1334
1335    /* This creates a new master F_MULTI target if tg existed before as a normal
1336     * target with prerequisites or recipes. */
1337    if( !(tg->ce_flag & F_MULTI) && (tg->ce_prq || tg->ce_recipe) ) {
1338       /* Allocate a new master cell. */
1339       TALLOC(cp, 1, CELL);
1340       *cp = *tg;
1341
1342       /* F_MULTI master */
1343       tg->ce_prq    = NIL(LINK);
1344       tg->ce_flag  |= F_RULES|F_MULTI|F_TARGET;
1345       tg->ce_attr  |= A_SEQ;
1346       tg->ce_recipe = NIL(STRING);
1347       tg->ce_dir    = NIL(char);
1348
1349       /* F_MULTI member for preexisting elements */
1350       cp->ce_count  = ++tg->ce_index;
1351       cp->ce_cond   = NIL(STRING);
1352       cp->ce_set    = NIL(CELL);
1353       cp->ce_all.cl_prq = cp;
1354       CeNotMe(cp)   = NIL(LINK);
1355
1356       Add_prerequisite(tg, cp, FALSE, TRUE);
1357    }
1358
1359    /* Alocate memory for new member of F_MULTI target */
1360    TALLOC(cp, 1, CELL);
1361    *cp = *tg;
1362
1363    /* This is reached if the target already exists, but without having
1364     * prerequisites or recepies. Morph it into a F_MULTI master cell. */
1365    if( !(tg->ce_flag & F_MULTI) ) {
1366       tg->ce_prq    = NIL(LINK);
1367       tg->ce_flag  |= F_RULES|F_MULTI|F_TARGET;
1368       tg->ce_attr  |= A_SEQ;
1369       tg->ce_recipe = NIL(STRING);
1370       tg->ce_dir    = NIL(char);
1371       cp->ce_cond   = NIL(STRING);
1372    }
1373    /* This handles the case of adding an additional target as a
1374     * prerequisite to a F_MULTI target. */
1375    else {
1376       cp->ce_flag  &= ~(F_RULES|F_MULTI);
1377       cp->ce_attr  &= ~A_SEQ;
1378       cp->ce_prq    = NIL(LINK);
1379       cp->ce_index  = 0;
1380       cp->ce_cond   = NIL(STRING);
1381    }
1382    cp->ce_count = ++tg->ce_index;
1383    cp->ce_flag |= F_TARGET;
1384    cp->ce_set   = NIL(CELL);
1385    cp->ce_all.cl_prq = cp;
1386    CeNotMe(cp)  = NIL(LINK);
1387
1388    Add_prerequisite(tg, cp, FALSE, TRUE);
1389    return(cp);
1390 }
1391
1392
1393 static void
1394 _add_indirect_prereq( pq )/*
1395 ==========================
1396    Prerequisite is an indirect prerequisite for a %-target, add it to
1397    the target's list of indirect prerequsites to add on match. */
1398 CELLPTR pq;
1399 {
1400    register LINKPTR ln;
1401
1402    /* Only add to list of indirect prerequsites if it is not in already. */
1403    for(ln=_sv_ind_prq; ln; ln=ln->cl_next)
1404       if(strcmp(ln->cl_prq->CE_NAME,pq->CE_NAME) == 0)
1405          return;
1406
1407    /* Not in, add it. */
1408    TALLOC( ln, 1, LINK );
1409    ln->cl_next = _sv_ind_prq;
1410    ln->cl_prq  = pq;
1411    _sv_ind_prq = ln;
1412 }
1413
1414
1415
1416 static void
1417 _set_attributes( attr, set_dir, cp )/*
1418 ======================================
1419         Set the appropriate attributes for a cell */
1420 t_attr  attr;
1421 char    *set_dir;
1422 CELLPTR cp;
1423 {
1424    char   *dir = 0;
1425
1426    DB_ENTER( "_set_attributes" );
1427
1428    /* If .SETDIR attribute is set then we have at least .SETDIR= in the
1429     * set_dir string.  So go and fishout what is at the end of the =.
1430     * If not set and not NULL then propagate it to the target cell. */
1431
1432    if( attr & A_SETDIR ) {
1433       char *p;
1434       if( (p = strchr( set_dir, '=' )) != NULL )
1435          dir = p + 1;
1436
1437       if( cp->ce_dir )
1438          Warning( "Multiple .SETDIR for %s ignored", cp->CE_NAME );
1439       else if( *dir )
1440          cp->ce_dir = DmStrDup(dir);
1441    }
1442    cp->ce_attr |= attr;         /* set rest of attributes for target */
1443
1444    DB_VOID_RETURN;
1445 }
1446
1447
1448
1449 static void
1450 _set_global_attr( attr )/*
1451 ==========================
1452         Handle the setting of the global attribute functions based on
1453         The attribute flags set in attr. */
1454 t_attr attr;
1455 {
1456    t_attr flag;
1457
1458    /* Some compilers can't handle a switch on a long, and t_attr is now a long
1459     * integer on some systems.  foey! */
1460    for( flag = MAX_ATTR; flag; flag >>= 1 )
1461       if( flag & attr ) {
1462          if( flag == A_PRECIOUS)      Def_macro(".PRECIOUS",  "y", M_EXPANDED);
1463          else if( flag == A_SILENT)   Def_macro(".SILENT",    "y", M_EXPANDED);
1464          else if( flag == A_IGNORE )  Def_macro(".IGNORE",    "y", M_EXPANDED);
1465          else if( flag == A_EPILOG )  Def_macro(".EPILOG",    "y", M_EXPANDED);
1466          else if( flag == A_PROLOG )  Def_macro(".PROLOG",    "y", M_EXPANDED);
1467          else if( flag == A_NOINFER ) Def_macro(".NOINFER",   "y", M_EXPANDED);
1468          else if( flag == A_SEQ )     Def_macro(".SEQUENTIAL","y", M_EXPANDED);
1469          else if( flag == A_SHELL )   Def_macro(".USESHELL",  "y", M_EXPANDED);
1470          else if( flag == A_MKSARGS ) Def_macro(".MKSARGS",   "y", M_EXPANDED);
1471 #if !defined(__CYGWIN__)
1472          else if( flag == A_SWAP )    Def_macro(".SWAP",      "y", M_EXPANDED);
1473 #else
1474          else if( flag == A_WINPATH ) Def_macro(".WINPATH",   "y", M_EXPANDED);
1475 #endif
1476       }
1477
1478    attr &= ~A_GLOB;
1479    if( attr ) Warning( "Non global attribute(s) ignored" );
1480 }
1481
1482
1483
1484 static void
1485 _stick_at_head( cp, pq )/*
1486 ==========================
1487         Add the prerequisite list to the head of the existing prerequisite
1488         list */
1489
1490 CELLPTR cp;             /* cell for target node */
1491 CELLPTR pq;             /* list of prerequisites to add */
1492 {
1493    DB_ENTER( "_stick_at_head" );
1494
1495    if( pq->ce_link != NIL(CELL) ) _stick_at_head( cp, pq->ce_link );
1496    Add_prerequisite( cp, pq, TRUE, FALSE );
1497
1498    DB_VOID_RETURN;
1499 }
1500
1501
1502
1503 static t_attr
1504 _is_attribute( name )/*
1505 =======================
1506    Check the passed name against the list of valid attributes and return the
1507    attribute index if it is, else return 0, indicating the name is not a valid
1508    attribute.  The present attributes are defined in dmake.h as A_xxx #defines,
1509    with the corresponding makefile specification:  (note they must be named
1510    exactly as defined below)
1511
1512    Valid attributes are:  .IGNORE, .SETDIR=, .SILENT, .PRECIOUS, .LIBRARY,
1513                           .EPILOG, .PROLOG,  .LIBRARYM, .SYMBOL, .UPDATEALL,
1514                           .USESHELL, .NOINFER, .PHONY, .SWAP/.WINPATH, .SEQUENTIAL
1515                           .NOSTATE,  .MKSARGS, .IGNOREGROUP, .GROUP, .FIRST
1516                           .EXECUTE, .ERRREMOVE
1517
1518    NOTE:  The strcmp's are OK since at most three are ever executed for any
1519           one attribute check, and that happens only when we can be fairly
1520           certain we have an attribute.  */
1521 char *name;
1522 {
1523    t_attr attr = 0;
1524
1525    DB_ENTER( "_is_attribute" );
1526
1527    if( *name++ == '.' )
1528       switch( *name )
1529       {
1530          case 'E':
1531             if( !strcmp(name, "EPILOG") )           attr = A_EPILOG;
1532             else if( !strcmp(name, "EXECUTE"))      attr = A_EXECUTE;
1533             else if( !strcmp(name, "ERRREMOVE"))    attr = A_ERRREMOVE;
1534             else attr = 0;
1535             break;
1536
1537          /* A_FIRST implies A_IGNORE, handled in ST_INCLUDE */
1538          case 'F':
1539             attr = (strcmp(name, "FIRST")) ? 0 : A_FIRST;
1540             break;
1541
1542          case 'G': attr = (strcmp(name, "GROUP"))    ? 0 : A_GROUP;   break;
1543          case 'L': attr = (strcmp(name, "LIBRARY"))  ? 0 : A_LIBRARY; break;
1544          case 'M': attr = (strcmp(name, "MKSARGS"))  ? 0 : A_MKSARGS; break;
1545
1546          case 'I':
1547             if( !strcmp(name, "IGNORE") )           attr = A_IGNORE;
1548             else if( !strcmp(name, "IGNOREGROUP"))  attr = A_IGNOREGROUP;
1549             else attr = 0;
1550             break;
1551
1552          case 'N':
1553             if( !strcmp(name, "NOINFER") )      attr = A_NOINFER;
1554             else if( !strcmp(name, "NOSTATE"))  attr = A_NOSTATE;
1555             else attr = 0;
1556             break;
1557
1558          case 'U':
1559             if( !strcmp(name, "UPDATEALL") )    attr = A_UPDATEALL;
1560             else if( !strcmp(name, "USESHELL")) attr = A_SHELL;
1561             else attr = 0;
1562             break;
1563
1564          case 'P':
1565             if( !strcmp(name, "PRECIOUS") )     attr = A_PRECIOUS;
1566             else if( !strcmp(name, "PROLOG") )  attr = A_PROLOG;
1567             else if( !strcmp(name, "PHONY") )   attr = A_PHONY;
1568             else attr = 0;
1569             break;
1570
1571          case 'S':
1572             if( !strncmp(name, "SETDIR=", 7) )    attr = A_SETDIR;
1573             else if( !strcmp(name, "SILENT") )    attr = A_SILENT;
1574             else if( !strcmp(name, "SYMBOL") )    attr = A_SYMBOL;
1575             else if( !strcmp(name, "SEQUENTIAL")) attr = A_SEQ;
1576             /* A_SWAP has no meaning except for MSDOS. */
1577             else if( !strcmp(name, "SWAP"))       attr = A_SWAP;
1578             else attr = 0;
1579             break;
1580
1581          case 'W': attr = (strcmp(name, "WINPATH"))  ? 0 : A_WINPATH; break;
1582       }
1583
1584    DB_RETURN( attr );
1585 }
1586
1587
1588
1589 static int
1590 _is_special( tg )/*
1591 ===================
1592    This function returns TRUE if the name passed in represents a special
1593    target, otherwise it returns false.  A special target is one that has
1594    a special meaning to dmake, and may require processing at the time that
1595    it is parsed.
1596
1597    Current Special targets are:
1598         .GROUPPROLOG    .GROUPEPILOG    .INCLUDE        .IMPORT
1599         .EXPORT         .SOURCE         .SUFFIXES       .ERROR        .EXIT
1600         .INCLUDEDIRS    .MAKEFILES      .REMOVE         .KEEP_STATE
1601         .TARGETS        .ROOT
1602 */
1603 char *tg;
1604 {
1605    DB_ENTER( "_is_special" );
1606
1607    if( *tg++ != '.' ) DB_RETURN( 0 );
1608
1609    switch( *tg )
1610    {
1611       case 'E':
1612          if( !strcmp( tg, "ERROR" ) )           DB_RETURN( ST_REST     );
1613          else if( !strcmp( tg, "EXPORT" ) )     DB_RETURN( ST_EXPORT   );
1614          else if( !strcmp( tg, "EXIT" ) )       DB_RETURN( ST_EXIT     );
1615          break;
1616
1617       case 'G':
1618          if( !strcmp( tg, "GROUPPROLOG" ))      DB_RETURN( ST_REST     );
1619          else if( !strcmp( tg, "GROUPEPILOG" )) DB_RETURN( ST_REST     );
1620          break;
1621
1622       case 'I':
1623          if( !strcmp( tg, "IMPORT" ) )          DB_RETURN( ST_IMPORT   );
1624          else if( !strcmp( tg, "INCLUDE" ) )    DB_RETURN( ST_INCLUDE  );
1625          else if( !strcmp( tg, "INCLUDEDIRS" )) DB_RETURN( ST_REST     );
1626          break;
1627
1628       case 'K':
1629          if( !strcmp( tg, "KEEP_STATE" ) )      DB_RETURN( ST_KEEP     );
1630          break;
1631
1632       case 'M':
1633          if( !strcmp( tg, "MAKEFILES" ) )       DB_RETURN( ST_REST     );
1634          break;
1635
1636       case 'R':
1637          if( !strcmp( tg, "REMOVE" ) )          DB_RETURN( ST_REST     );
1638          else if( !strcmp( tg, "ROOT" ) )       DB_RETURN( ST_REST     );
1639          break;
1640
1641       case 'S':
1642          if( !strncmp( tg, "SOURCE", 6 ) )      DB_RETURN( ST_SOURCE   );
1643          else if( !strncmp(tg, "SUFFIXES", 8 )) {
1644             if  (Verbose & V_WARNALL)
1645                Warning( "The .SUFFIXES target has no special meaning and is deprecated." );
1646             DB_RETURN( ST_SOURCE   );
1647          }
1648          break;
1649
1650       case 'T':
1651          if( !strcmp( tg, "TARGETS" ) )         DB_RETURN( ST_REST     );
1652          break;
1653    }
1654
1655    DB_RETURN( 0 );
1656 }
1657
1658
1659
1660 static int
1661 _is_percent( np )/*
1662 ===================
1663         return TRUE if np points at a string containing a % sign */
1664 char *np;
1665 {
1666    return( (strchr(np,'%') && (*np != '\'' && np[strlen(np)-1] != '\'')) ?
1667            TRUE : FALSE );
1668 }
1669
1670
1671 static char *
1672 _is_magic( np )/*
1673 =================
1674    return NULL if np does not points at a string of the form
1675       .<chars>.<chars>  or  .<chars>
1676    where chars are "visible characters" for the current locale. If np is of the
1677    first form we return a pointer to the second '.' and for the second form we
1678    return a pointer to the '.'.
1679
1680    NOTE:  reject target if it contains / or begins with ..
1681           reject also .INIT and .DONE because they are mentioned in the
1682           man page. */
1683 char *np;
1684 {
1685    register char *n;
1686
1687    n = np;
1688    if( *n != '.' ) return( NIL(char) );
1689    if (strchr(DirBrkStr, *(n+1))!=NULL || *(n+1) == '.' )
1690       return (NIL(char));
1691    if( !strcmp( n+1, "INIT" ) || !strcmp( n+1, "DONE" ) )
1692       return (NIL(char));
1693
1694    for( n++; isgraph(*n) && (*n != '.'); n++ );
1695
1696    if( *n != '\0' ) {
1697       if( *n != '.' )  return( NIL(char) );
1698       for( np = n++; isgraph( *n ) && (*n != '.'); n++ );
1699       if( *n != '\0' ) return( NIL(char) );
1700    }
1701    /* Until dmake 4.5 a .<suffix> target was ignored when AUGMAKE was
1702     * set and evaluated as a meta target if unset (also for -A).
1703     * To keep maximum compatibility accept this regardles of the AUGMAKE
1704     * status. */
1705
1706    /* np points at the second . of .<chars>.<chars> string.
1707     * if the special target is of the form .<chars> then np points at the
1708     * first . in the token. */
1709
1710    return( np );
1711 }
1712
1713
1714 static int
1715 _add_root(tg)/*
1716 ===============
1717    Adds "tg" to the prerequisits list of "Targets" if "Target" is not TRUE,
1718    i.e. to the list of targets that are to be build.
1719    Instead io setting "Target" to TRUE, TRUE is returned as more targets
1720    might be defined in the current makefile line and they all have to be
1721    add to "Targets" in this case.  */
1722
1723 CELLPTR tg;
1724 {
1725    int res = FALSE;
1726
1727    if(tg == Targets)
1728       return(TRUE);
1729
1730    if( !Target && !(tg->ce_flag & (F_SPECIAL|F_PERCENT)) ) {
1731       Add_prerequisite(Targets, tg, FALSE, TRUE);
1732
1733       tg->ce_flag |= F_TARGET;
1734       tg->ce_attr |= A_FRINGE;
1735       res          = TRUE;
1736    }
1737
1738    return(res);
1739 }