dmake/rulparse.c

   1 /*
   2 --
   3 -- SYNOPSIS
   4 --      Perform semantic analysis on input
   5 --
   6 -- DESCRIPTION
   7 --  This code performs semantic analysis on the input, and builds
   8 --  the complex internal datastructure that is used to represent
   9 --  the user makefile.
  10 --
  11 -- AUTHOR
  12 --      Dennis Vadura, dvadura@dmake.wticorp.com
  13 --
  14 -- WWW
  15 --      http://dmake.wticorp.com/
  16 --
  17 -- COPYRIGHT
  18 --      Copyright (c) 1996,1997 by WTI Corp.  All rights reserved.
  19 --
  20 --      This program is NOT free software; you can redistribute it and/or
  21 --      modify it under the terms of the Software License Agreement Provided
  22 --      in the file <distribution-root>/readme/license.txt.
  23 --
  24 -- LOG
  25 --      Use cvs log to obtain detailed change logs.
  26 */
  27
  28 #include "extern.h"
  29
  30 /* prototypes for local functions */
  31 static  void    _add_indirect_prereq ANSI((CELLPTR));
  32 static  int     _add_root ANSI((CELLPTR));
  33 static  CELLPTR _build_graph ANSI((int, CELLPTR, CELLPTR));
  34 static  char*   _build_meta ANSI((char*));
  35 static  int _do_magic ANSI((int, char*, CELLPTR, CELLPTR, t_attr, char*));
  36 static  void    _do_special ANSI((int, int, t_attr,char*,CELLPTR,CELLPTR,int*));
  37 static  int _do_targets ANSI((int, t_attr, char*, CELLPTR, CELLPTR));
  38 static  t_attr  _is_attribute ANSI((char*));
  39 static  int _is_special ANSI((char*));
  40 static  char*   _is_magic ANSI((char*));
  41 static  int _is_percent ANSI((char*));
  42 static  CELLPTR _make_multi ANSI((CELLPTR));
  43 static  CELLPTR _replace_cell ANSI((CELLPTR,CELLPTR,CELLPTR));
  44 static  void    _set_attributes ANSI((t_attr, char*, CELLPTR ));
  45 static  void    _stick_at_head ANSI((CELLPTR, CELLPTR));
  46 static  void    _set_global_attr ANSI((t_attr));
  47
  48
  49 /* static variables that must persist across invocation of Parse_rule_def */
  50 static CELLPTR    _sv_targets = NIL(CELL);
  51 static STRINGPTR  _sv_rules   = NIL(STRING); /* first recipe element. */
  52 static STRINGPTR  _sv_crule   = NIL(STRING); /* current/last recipe element. */
  53 static CELLPTR    _sv_edgel   = NIL(CELL);
  54 static LINKPTR    _sv_ind_prq = NIL(LINK);   /* indirect prerequisites for % cell */
  55 static int    _sp_target  = FALSE;
  56 static t_attr     _sv_attr;
  57 static int        _sv_flag;
  58 static int    _sv_op;
  59 static char      *_sv_setdir;
  60 static char   _sv_globprq_only = 0;
  61
  62 /* Define for global attribute mask (A_SWAP == A_WINPATH) */
  63 #define A_GLOB   (A_PRECIOUS | A_SILENT | A_IGNORE | A_EPILOG | A_SWAP |\
  64           A_SHELL | A_PROLOG | A_NOINFER | A_SEQ | A_MKSARGS )
  65
  66
  67 PUBLIC int
  68 Parse_rule_def( state )/*
  69 =========================
  70    Parse the rule definition contained in Buffer, and modify the state
  71    if appropriate.  The function returns 0, if the definition is found to
  72    be an illegal rule definition, and it returns 1 if it is a rule definition.
  73    */
  74 int *state;
  75 {
  76   TKSTR     input;      /* input string struct for token search   */
  77   CELLPTR   targets;    /* list of targets if any         */
  78   CELLPTR   prereq;     /* list of prereq if any          */
  79   CELLPTR   prereqtail; /* tail of prerequisite list          */
  80   CELLPTR   cp;     /* temporary cell pointer for list making */
  81   char  *result;    /* temporary storage for result       */
  82   char      *tok;       /* temporary pointer for tokens       */
  83   char         *set_dir;       /* value of setdir attribute              */
  84   char      *brk;       /* break char list for Get_token      */
  85   char         *firstrcp;      /* first recipe line, from ; in rule line */
  86   t_attr       attr;           /* sum of attribute flags for current tgts*/
  87   t_attr    at;     /* temp place to keep an attribute code   */
  88   int       op;     /* rule operator              */
  89   int       special;    /* indicate special targets in rule   */
  90   int       augmeta;    /* indicate .<suffix> like target     */
  91   int       percent;    /* indicate percent rule target       */
  92   int       percent_prq;    /* indicate mixed %-rule prereq possible  */
  93
  94   DB_ENTER( "Parse_rule_def" );
  95
  96   op          = 0;
  97   attr       = 0;
  98   special    = 0;
  99   augmeta    = 0;
 100   percent    = 0;
 101   set_dir    = NIL( char );
 102   targets    = NIL(CELL);
 103   prereq     = NIL(CELL);
 104   prereqtail = NIL(CELL);
 105   percent_prq = 0;
 106
 107   /* Check to see if the line is of the form:
 108    *    targets : prerequisites; first recipe line
 109    * If so remember the first_recipe part of the line. */
 110
 111   firstrcp = strchr( Buffer, ';' );
 112   if( firstrcp != NIL( char ) ) {
 113     *firstrcp++ = 0;
 114     firstrcp = DmStrSpn( firstrcp, " \t" );
 115   }
 116
 117   result = Expand( Buffer );
 118   /* Remove CONTINUATION_CHAR, keep the <nl> */
 119   for( brk=strchr(result,CONTINUATION_CHAR); brk != NIL(char); brk=strchr(brk,CONTINUATION_CHAR) )
 120     if( brk[1] == '\n' )
 121       *brk = ' ';
 122     else
 123       brk++;
 124
 125   DB_PRINT( "par", ("Scanning: [%s]", result) );
 126
 127   SET_TOKEN( &input, result );
 128   brk = ":-^!|";
 129   Def_targets = TRUE;
 130
 131   /* Scan the input rule line collecting targets, the operator, and any
 132    * prerequisites.  Stop when we run out of targets and prerequisites. */
 133
 134   while( *(tok = Get_token( &input, brk, TRUE )) != '\0' )
 135     if( !op ) {
 136       /* we are scanning targets and attributes
 137        * check to see if token is an operator.  */
 138
 139       op = Rule_op( tok );
 140
 141       if( !op ) {
 142         /* Define a new cell, or get pointer to pre-existing cell.  */
 143         /* Do we need cells for attributes? If not move the definition
 144          * to the target part.  */
 145         cp = Def_cell( tok );
 146         /* A $ character indicates either a literal $ in the pathname (this
 147          * was broken before) or a dynamic macro (this is a syntax error).
 148          * FIXME: Here would be the place to add a sanity check. */
 149         DB_PRINT( "par", ("tg_cell [%s]", tok) );
 150
 151         if( (at = _is_attribute(tok)) != 0 ) {
 152           /* Ignore .SILENT when -vr is active. */
 153           if( (Verbose & V_FORCEECHO) && (at == A_SILENT) )
 154             at = 0;
 155
 156           /* Logically OR the attributes specified into one main
 157            * ATTRIBUTE mask. */
 158
 159           if( at == A_SETDIR ) {
 160             if( set_dir != NIL( char ) )
 161               Warning( "Multiple .SETDIR attribute ignored" );
 162             else
 163               set_dir = DmStrDup( tok );
 164           }
 165
 166           attr |= at;
 167         }
 168         else {
 169           /* Not an attribute, this must be a target. */
 170           int tmp;
 171
 172           tmp = _is_special( tok );
 173
 174           if( _is_percent( tok ) ) {
 175             /* First %-target checks if there were non-%-targets before. */
 176             if( !percent && targets != NIL(CELL) )
 177               Fatal( "A %%-target must not be mixed with non-%%-targets, offending target [%s]", tok );
 178
 179             percent++;
 180             cp->ce_flag |= F_PERCENT;
 181           } else {
 182             if( percent )
 183               Fatal( "A non-%%-target must not be mixed with %%-targets, offending target [%s]", tok );
 184           }
 185
 186           if( _is_magic( tok ) ) {
 187             /* Check that AUGMAKE targets are not mixed with other
 188              * targets. The return value of _is_magic() is discarded and
 189              * calculated again in _do_targets() if this rule definition
 190              * really is a .<suffix> like target.
 191              * If we would allow only one target per line we could easily
 192              * store the result for later, but for multiple .<suffix>
 193              * targets this creates too much overhead.
 194              * These targets should be rare (obsolete?) anyway. */
 195             if( !augmeta && targets != NIL(CELL) )
 196               Fatal( "An AUGMAKE meta target must not be mixed with non AUGMAKE meta targets, offending target [%s]", tok );
 197
 198             augmeta++;
 199             cp->ce_flag |= F_MAGIC; /* do_magic will also add F_PERCENT later. */
 200           } else {
 201             if( augmeta )
 202               Fatal( "A non AUGMAKE meta target must not be mixed with AUGMAKE meta targets, offending target [%s]", tok );
 203           }
 204
 205           if( special )
 206             Fatal( "Special target must appear alone, found [%s]", tok );
 207           else if( !(cp->ce_flag & F_MARK) ) {
 208             /* Targets are kept in this list in lexically sorted order.
 209              * This allows for easy equality comparison of target
 210              * sets.*/
 211             CELLPTR prev,cur;
 212             for(prev=NIL(CELL),cur=targets;cur;prev=cur,cur=cur->ce_link)
 213               if(strcmp(cur->CE_NAME,cp->CE_NAME) > 0)
 214                 break;
 215
 216             cp->ce_link = cur;
 217
 218             if (!prev)
 219               targets = cp;
 220             else
 221               prev->ce_link = cp;
 222
 223             cp->ce_flag |= F_MARK | F_EXPLICIT;
 224             special = tmp;
 225           }
 226           else
 227             Warning( "Duplicate target [%s]", cp->CE_NAME );
 228         }
 229       }
 230       else {
 231         /* found an operator so empty out break list and clear mark
 232          * bits on target list, setting them all to F_VISITED*/
 233
 234         brk  = "";
 235         for( cp=targets; cp != NIL(CELL); cp=cp->ce_link ) {
 236           cp->ce_flag ^= F_MARK;
 237           cp->ce_flag |= F_VISITED;
 238         }
 239
 240         Def_targets = FALSE;
 241       }
 242     }
 243     else {
 244       /* Scanning prerequisites so build the prerequisite list.  We use
 245        * F_MARK flag to make certain we have only a single copy of the
 246        * prerequisite in the list */
 247
 248       cp = Def_cell( tok );
 249
 250       /* %-prerequisits require eiter a %-target or this might be a rule of
 251        * the "ATTRIBUTE_LIST : targets" form. */
 252       if( _is_percent( tok ) ) {
 253         if( percent || ((targets == NIL(CELL)) && attr) )
 254           percent_prq = 1;
 255         else
 256           Fatal( "Syntax error in %% rule, missing %% target");
 257       }
 258
 259       if( cp->ce_flag & F_VISITED ) {
 260         if( cp->ce_attr & A_COMPOSITE )
 261           continue;
 262         else
 263           Fatal( "Detected circular dependency in graph at [%s]",
 264                  cp->CE_NAME );
 265       }
 266       else if( !(cp->ce_flag & F_MARK) ) {
 267         DB_PRINT( "par", ("pq_cell [%s]", tok) );
 268         cp->ce_flag |= F_MARK;
 269
 270         if( prereqtail == NIL(CELL) )   /* keep prereq's in order */
 271           prereq = cp;
 272         else
 273           prereqtail->ce_link = cp;
 274
 275         prereqtail = cp;
 276         cp->ce_link = NIL(CELL);
 277       }
 278       else if( !(cp->ce_attr & A_LIBRARY) && (Verbose & V_WARNALL))
 279         Warning("Duplicate entry [%s] in prerequisite list",cp->CE_NAME);
 280     }
 281
 282   /* Check to see if we have a percent rule that has only global
 283    * prerequisites, i.e. they are of the form: "%.a : foo".
 284    * If so then set the flag so that later on, we don't issue
 285    * an error if such targets supply an empty set of rules. */
 286
 287   if( percent && !percent_prq && (prereq != NIL(CELL)) )
 288     _sv_globprq_only = 1;
 289
 290   /* It's ok to have targets with attributes, and no prerequisites, but it's
 291    * not ok to have no targets and no attributes, or no operator */
 292
 293   CLEAR_TOKEN( &input ); FREE(result); result = NIL(char);
 294   if( !op ) {
 295     DB_PRINT( "par", ("Not a rule [%s]", Buffer) );
 296     DB_RETURN( 0 );
 297   }
 298
 299   /* More than one percent target didn't work with prior versions. */
 300 #if 0
 301   if( (percent > 1) && !(op & R_OP_OR) )
 302     Warning( "Prior to dmake 4.5 only one\n"
 303              "%%-target per target-definition worked reliably. Check your makefiles.\n" );
 304 #endif
 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 static int
 807 _do_targets( op, attr, set_dir, targets, prereq )/*
 808 ===================================================
 809    Evaluate the values derived from the current target definition
 810    line. Helper functions _build_graph(), _do_magic(), _make_multi(),
 811    _add_root(), _replace_cell(), _set_attributes(), Clear_prerequisites()
 812    _stick_at_head(), Add_prerequisite() and _set_global_attr() are used.
 813    If successfull "_sv_targets" is set to "targets".
 814    Return RULE_SCAN if a recipe is expected to follow, otherwise
 815    NORMAL_SCAN. */
 816 int op;     /* rule operator                           */
 817 t_attr  attr;       /* attribute flags for current targets     */
 818 char    *set_dir;   /* value of setdir attribute               */
 819 CELLPTR targets;    /* list of targets (each cell maybe already
 820              * defined by a previous target definition
 821              * line.  */
 822 CELLPTR prereq;     /* list of prerequisites                   */
 823 {
 824    CELLPTR  tg1;        /* temporary target pointer     */
 825    CELLPTR  tp1;        /* temporary prerequisite pointer   */
 826    LINKPTR      prev_cell;  /* pointer for .UPDATEALL processing    */
 827    char     *p;     /* temporary char pointer       */
 828    int          tflag = FALSE;  /* set to TRUE if we add target to root */
 829    int          ret_state = RULE_SCAN;  /* Return state */
 830
 831    DB_ENTER( "_do_targets" );
 832
 833    /* If .UPDATEALL is set sort the target list that was temporary linked
 834     * with ce_link into a list using ce_link with ce_set pointing to the first
 835     * element. */
 836    /* FIXME: Check that .UPDATEALL and %-targets on one line work together. */
 837    if( attr & A_UPDATEALL ) {
 838       if( targets == NIL(CELL) )
 839      Fatal( ".UPDATEALL attribute requires non-empty list of targets" );
 840
 841       if (targets->ce_set == NIL(CELL)) {
 842      for(
 843         prev_cell=CeMeToo(targets),tg1=targets->ce_link;
 844         tg1 != NIL(CELL);
 845         tg1=tg1->ce_link
 846      ) {
 847         if (tg1->ce_set)
 848            Fatal( "Target [%s] appears on multiple .UPDATEALL lists",
 849               tg1->CE_NAME);
 850         tg1->ce_set = targets;
 851         TALLOC(prev_cell->cl_next, 1, LINK);
 852         prev_cell = prev_cell->cl_next;
 853         prev_cell->cl_prq = tg1;
 854      }
 855      targets->ce_set = targets;
 856       }
 857       else {
 858      LINKPTR ap;
 859      CELLPTR tp;
 860
 861      tp = targets;
 862      ap = CeMeToo(targets);
 863      while (ap && tp && ap->cl_prq == tp && tp->ce_set == targets) {
 864         ap = ap->cl_next;
 865         tp = tp->ce_link;
 866      }
 867      if (ap || tp)
 868         Fatal("Inconsistent .UPDATEALL lists for target [%s]",
 869           targets->CE_NAME);
 870       }
 871       targets->ce_link = NIL(CELL);
 872    }
 873
 874    for( tg1 = targets; tg1 != NIL(CELL); tg1 = tg1->ce_link ) {
 875       /* Check if tg1 is already marked as a %-target, but not a magic
 876        * (.xxx.yyy) target.  */
 877       int purepercent = (tg1->ce_flag & F_PERCENT) && !(tg1->ce_flag & F_MAGIC);
 878
 879       /* Check each target.  Check for inconsistencies between :: and : rule
 880        * sets.  :: may follow either : or :: but not the reverse.
 881        *
 882        * Any F_MULTI target (contains :: rules) is represented by a prerequisite
 883        * list hanging off the main target cell where each of the prerequisites
 884        * is a copy of the target cell but is not entered into the hash table.
 885        */
 886       if( !(op & R_OP_DCL ) && (tg1->ce_flag & F_MULTI) && !purepercent )
 887      Fatal( "':' vs '::' inconsistency in rules for %s", tg1->CE_NAME );
 888
 889       if( purepercent ) {
 890      /* Handle %-targets. */
 891      CELLPTR cur;
 892      CELLPTR tpq = NIL(CELL);
 893      CELLPTR nprq = NULL;
 894
 895 #ifdef DBUG
 896      DB_PRINT( "%", ("Handling %%-target [%s : : <prerequisites follow, maybe empty>]",
 897              tg1->CE_NAME) );
 898      for(cur=prereq;cur;cur=cur->ce_link) {
 899         DB_PRINT( "%", ("         %%-prerequisites : %s ",
 900                 cur->CE_NAME ? cur->CE_NAME : "<empty>") );
 901      }
 902 #endif
 903
 904      /* Handle indirect (global) prerequisites first. */
 905      for(cur=prereq;cur;cur=cur->ce_link) {
 906         char *name = cur->CE_NAME;
 907         int   len  = strlen(name);
 908
 909         if( *name == '\'' && name[len-1]=='\'' ){
 910            name[len-1] = '\0';
 911            len = strlen(name+1)+1;
 912            memmove(name,name+1,len);
 913            /* add indirect prerequisite */
 914            _add_indirect_prereq( cur );
 915         }
 916         else {
 917            /* Sort all "other" prerequisits into tpq, with nprq
 918         * pointing to the first element. */
 919            if (tpq)
 920           tpq->ce_link = cur;
 921            else
 922           nprq = cur;
 923            tpq = cur;
 924         }
 925      }
 926      /* Mark the last element of nprq. */
 927      if(tpq)
 928         tpq->ce_link=NIL(CELL);
 929      else
 930         nprq = NIL(CELL);
 931
 932      /* Handle "normal" prerequisites now. */
 933
 934      if ( op & R_OP_OR ) {
 935         /* for op == ':|' transform:
 936          * <%-target> :| <prereq_1> ... <prereq_n> ; <recipe>
 937          * into:
 938          * <%-target> : <prereq_1> ; <recipe>
 939          * ..
 940          * <%-target> : <prereq_n> ; <recipe>
 941          */
 942         for(tp1=nprq; tp1; tp1=tp1->ce_link) {
 943            CELLPTR tmpcell = tp1->ce_link;
 944            tp1->ce_link = NIL(CELL);
 945            _build_graph(op,tg1,tp1);
 946            tp1->ce_link = tmpcell;
 947         }
 948      }
 949      else {
 950         /* The inference mechanism for %-targets limits the number of
 951          * (non-indirect) prerequisite to one, but an unlimited number
 952          * of indirect prerequisites is possible. */
 953         if ( nprq && nprq->ce_link && !(op & R_OP_OR))
 954            Warning("More than one prerequisite\n"
 955            "for %%-target. Use :| ruleop or indirect prerequisites.");
 956
 957         _build_graph(op,tg1,nprq);
 958      }
 959       }
 960       else if( tg1->ce_flag & F_MAGIC &&
 961            (p = _is_magic( tg1->CE_NAME )) != NIL(char) &&
 962            _do_magic( op, p, tg1, prereq, attr, set_dir ) )
 963     ; /* _do_magic() does all that is needed (if return value is TRUE). */
 964       else if( op & R_OP_DCL ) {  /* op == :: */
 965      CELLPTR tmp_cell = _make_multi(tg1);
 966
 967      /* Add the F_MULTI master to .TARGETS (If not set already).
 968       * Do this here so that the member cell is not added instead
 969       * when the recipies are bound in Bind_rules_to_targets(). */
 970      tflag |= _add_root(tg1);
 971
 972      /* Replace the F_MULTI master with the member cell. */
 973      targets = _replace_cell( targets, tg1, tmp_cell );
 974
 975     /* We have to set (add) the attributes also for the F_MULTI master
 976      * target cell. As there is no recipe the setdir value is not
 977      * needed. _set_attributes() that follows in approx. 8 lines
 978      * will set the attributes for the F_MULTI member cell.  */
 979      tg1->ce_attr |= (attr & ~A_SETDIR);
 980
 981      /* Now switch tg1 to the current (F_MULTI prereq.) target.
 982       * All recipes have to be added to that cell and not to the
 983       * F_MULTI master.  */
 984      tg1 = tmp_cell;
 985       }
 986
 987       if( !purepercent ) _set_attributes( attr, set_dir, tg1 );
 988
 989       /* Build the proper prerequisite list of the target.  If the `-',
 990        * modifier was used clear the prerequisite list before adding any
 991        * new prerequisites.  Else add them to the head/tail as appropriate.
 992        *
 993        * If the target has F_PERCENT set then no prerequisites are used. */
 994
 995       if( !(tg1->ce_flag & F_PERCENT) ) {
 996      if( op & R_OP_MI ) Clear_prerequisites( tg1 ); /* op == :- */
 997
 998      if( (op & R_OP_UP) && (tg1->ce_prq != NIL(LINK)) ) /* op == :^ */
 999         _stick_at_head( tg1, prereq );
1000      else for( tp1=prereq; tp1 != NIL(CELL); tp1 = tp1->ce_link )
1001         Add_prerequisite( tg1, tp1, FALSE, FALSE );
1002       }
1003       else if( op & (R_OP_MI | R_OP_UP) )
1004      Warning( "Modifier(s) `^-' for %-meta target ignored" );
1005    }
1006
1007    /* In case a F_MULTI member that was the first prerequisite of .TARGETS */
1008    if(tflag)
1009       Target = TRUE;
1010
1011    /* Check to see if we have NO targets but some attributes, i.e. an
1012     * Attribute-Definition.  If so then apply all of the attributes to the
1013     * complete list of prerequisites.  No recipes are allowed to follow. */
1014
1015    if( (targets == NIL(CELL)) && attr ) {
1016       ret_state = NORMAL_SCAN;
1017       if( prereq != NIL(CELL) )
1018      for( tp1=prereq; tp1 != NIL(CELL); tp1 = tp1->ce_link )
1019         _set_attributes( attr, set_dir, tp1 );
1020       else
1021      _set_global_attr( attr );
1022    }
1023
1024    /* Now that we have built the lists of targets, the parser must parse the
1025     * recipes if there are any.  However we must start the recipe list with the
1026     * recipe specified as via the ; kludge, if there is one */
1027    _sv_targets = targets;
1028    _sv_attr    = attr;
1029    _sv_flag    = ((op & R_OP_BG) ? F_SINGLE : F_DEFAULT);
1030
1031    DB_RETURN( ret_state );
1032 }
1033
1034
1035 static int
1036 _do_magic( op, dot, target, prereq, attr, set_dir )/*
1037 =====================================================
1038    This function investigates dot for being a magic target of the form
1039    .<chars>.<chars> or .<chars> and creates the appropriate % rules for
1040    that target.
1041    If the target is given with an undefined syntax, i.e. with prerequisites,
1042    then this function terminates early without creating % rules and
1043    returns 0.
1044    If successful the function returns 1.
1045
1046    The function builds the % rule, `%.o : %.c'  from .c.o, and
1047    `% : %.a' from .a */
1048
1049 int op;
1050 char    *dot;
1051 CELLPTR target;
1052 CELLPTR prereq;
1053 t_attr  attr;
1054 char    *set_dir;
1055 {
1056    CELLPTR tg;
1057    CELLPTR prq;
1058    char    *tmp, *tmp2;
1059
1060    DB_ENTER( "_do_magic" );
1061
1062    DB_PRINT("%", ("Analysing magic target [%s]", target->CE_NAME));
1063
1064    if( prereq != NIL(CELL) ) {
1065       Warning( "Ignoring AUGMAKE meta-target [%s] because prerequisites are present.", target->CE_NAME );
1066       DB_RETURN(0);
1067    }
1068
1069    if( dot == target->CE_NAME ) {    /* its of the form .a */
1070       tg  = Def_cell( "%" );
1071       tmp = _build_meta( target->CE_NAME );
1072       prq = Def_cell( tmp );
1073       FREE( tmp );
1074
1075       _build_graph( op, tg, prq );
1076    }
1077    else {
1078       tmp = _build_meta( dot );
1079       tg  = Def_cell( tmp );
1080       FREE( tmp );
1081
1082       tmp = _build_meta( tmp2 = DmSubStr( target->CE_NAME, dot ) );
1083       prq = Def_cell( tmp );
1084       FREE( tmp  );
1085       FREE( tmp2 );
1086
1087       _build_graph( op, tg, prq );
1088    }
1089
1090    tg->ce_flag      |= F_PERCENT;
1091    target->ce_flag  |= (F_MAGIC|F_PERCENT);
1092
1093    _set_attributes( attr, set_dir, tg );
1094
1095    DB_RETURN(1);
1096 }
1097
1098
1099 static CELLPTR
1100 _replace_cell( lst, cell, rep )/*
1101 =================================
1102    Replace cell with rep in lst. Note if cell is not part of lst we are in
1103    real trouble. */
1104 CELLPTR lst;
1105 CELLPTR cell;
1106 CELLPTR rep;
1107 {
1108    register CELLPTR tp;
1109
1110    if( lst == cell ) {
1111       rep->ce_link = lst->ce_link;
1112       lst = rep;
1113    }
1114    else {
1115       for( tp=lst; tp->ce_link != cell && tp ; tp=tp->ce_link );
1116       if( !tp )
1117      Fatal( "Internal Error: cell not part of lst." );
1118       rep->ce_link = tp->ce_link->ce_link;
1119       tp->ce_link = rep;
1120    }
1121
1122    return(lst);
1123 }
1124
1125
1126 static char *
1127 _build_meta( name )/*
1128 =====================
1129    Check to see if the name is of the form .c~ if so and if Augmake
1130    translation is enabled then return s.%.c, else return %.suff, where if the
1131    suffix ends in '~' then leave it be.*/
1132 char *name;
1133 {
1134    char *tmp;
1135    int  test = (STOBOOL(Augmake) ? name[strlen(name)-1] == '~' : 0);
1136
1137    tmp = DmStrJoin( test ? "s.%" : "%", name, -1, FALSE);
1138    if( test ) tmp[ strlen(tmp)-1 ] = '\0';
1139
1140    return(tmp);
1141 }
1142
1143
1144 static CELLPTR
1145 _build_graph( op, target, prereq )/*
1146 ====================================
1147    This function is called to build the graph for the % rule given by
1148    target : prereq cell combination.  This function assumes that target
1149    is a % target and that prereq is one or multiple non-indirect prerequisite.
1150    It also assumes that target cell has F_PERCENT set already.
1151
1152    NOTE: If more than one prerequisite is present this function handles them
1153    correctly but the lookup still only uses the first (BUG!).
1154
1155    R_OP_CL (:) rules replace existing rules if any, %.o :: %.c is meaningless.
1156
1157    The function always returns NIL(CELL). */
1158 int op;
1159 CELLPTR target;
1160 CELLPTR prereq;
1161 {
1162    LINKPTR edl;
1163    CELLPTR edge = 0;
1164    CELLPTR tpq,cur;
1165    int match;
1166
1167 #ifdef DBUG
1168    DB_ENTER( "_build_graph" );
1169    DB_PRINT( "%", ("Building graph for [%s : <prerequisites follow, maybe empty>]",
1170            target->CE_NAME) );
1171    for(tpq=prereq;tpq;tpq=tpq->ce_link) {
1172       DB_PRINT( "%", ("         %%-prerequisites : %s ",
1173               tpq->CE_NAME ? tpq->CE_NAME : "<empty>") );
1174    }
1175 #endif
1176
1177    /* Currently multiple prerequisites are not (yet) handled correctly.
1178     * We already issue a warning in _do_targets(), don't issue it here
1179     * again.
1180    if ( prereq && prereq->ce_link )
1181       Warning( "Internal Error: more than one prerequisite in _build_graph." );
1182     */
1183
1184    /* There cannot be more than one target name ( linked with
1185     * (CeMeToo(target))->cl_next ) per %-target master.
1186     * FIXME: remove this check after verifying that it never triggers. */
1187    if ( (CeMeToo(target))->cl_next )
1188       Fatal( "Internal Error: more than one target name in _build_graph." );
1189
1190    /* Search the list of prerequisites for the current target and see if
1191     * any of them match the current %-meta's : prereq's pair.  NOTE that
1192     * %-metas are built as if they were F_MULTI targets, i.e. the target
1193     * definitions for the %-target members are stored in the prerequisites
1194     * list of the master target. */
1195    /* This relies on target->ce_prq being NULL if this is the first
1196     * occurrence of this %-target and therefore not yet having a %-target
1197     * master. */
1198    match = FALSE;
1199    for(edl=target->ce_prq; !match && edl != NIL(LINK); edl=edl->cl_next) {
1200       LINKPTR l1,l2;
1201       edge = edl->cl_prq;
1202
1203       DB_PRINT("%", ("Trying to match [%s]",edge?edge->CE_NAME:"(nil)"));
1204
1205       /* First we match the target sets, if this fails then we don't have to
1206        * bother with the prerequisite sets.  The targets sets are sorted.
1207        * this makes life very simple. */
1208       /* ce_dir is handled per member target, no check needed for the
1209        * master target. */
1210
1211       /* FIXME: We already checked above that there is only one target
1212        * name. Remove the comparisons for following names. */
1213       l1 = CeMeToo(target); /* Used by .UPDATEALL !!! */
1214       l2 = CeMeToo(edge);
1215       while(l1 && l2 && l1->cl_prq == l2->cl_prq) {
1216      l1=l1->cl_next;
1217      l2=l2->cl_next;
1218       }
1219       /* If both l1 and l2 are NULL we had a match. */
1220       if (l1 || l2)
1221      continue;
1222
1223       /* target sets match, so check prerequisites. */
1224       if(    (!edge->ce_prq && !prereq) /* matches both empty - separate this. */
1225       || (   edge->ce_prq
1226           && (   edge->ce_dir == _sv_setdir
1227           || (   edge->ce_dir
1228               && _sv_setdir
1229               && !strcmp(edge->ce_dir,strchr(_sv_setdir,'=')+1)
1230              )
1231          )
1232          )
1233       ) {
1234      LINKPTR prql;
1235
1236      /* this is a really gross way to compare two sets, it's n^2 but
1237       * since the sets are assumed to always be tiny, it should be ok. */
1238      for(tpq=prereq; tpq; tpq=tpq->ce_link) {
1239         for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1240            if (prql->cl_prq == tpq)
1241           break;
1242
1243         if(prql == NIL(LINK))
1244            break;
1245
1246         prql->cl_prq->ce_flag |= F_MARK;
1247      }
1248
1249      if (tpq == NIL(CELL)) {
1250         for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1251            if(!(prql->cl_prq->ce_flag & F_MARK))
1252           break;
1253
1254         if(prql == NIL(LINK))
1255         match = TRUE;
1256      }
1257
1258      /* clean up the mark bits. */
1259      for(prql=edge->ce_prq;prql;prql=prql->cl_next)
1260         prql->cl_prq->ce_flag &= ~F_MARK;
1261       }
1262    }
1263
1264    if( match ) {
1265       /* match is TRUE hence, we found an edge joining the target and the
1266        * prerequisite so reset the new edge so that new values replace it. */
1267       DB_PRINT( "%", ("It's an old edge") );
1268
1269       edge->ce_dir    = NIL(char);
1270       edge->ce_flag  &= (F_PERCENT|F_MAGIC|F_DFA);
1271       edge->ce_attr  &= A_NOINFER;
1272    }
1273    else {
1274       DB_PRINT( "%", ("Adding a new edge") );
1275
1276       edge = _make_multi(target);
1277
1278       /* FIXME: There can be only one %-target. */
1279       for(edl=CeMeToo(target);edl;edl=edl->cl_next) {
1280      if( !((tpq=edl->cl_prq)->ce_flag & F_DFA) ) {
1281         Add_nfa( tpq->CE_NAME );
1282         tpq->ce_flag |= F_DFA;
1283      }
1284
1285      edl->cl_prq->ce_set = edge;
1286       }
1287
1288       edge->ce_all = target->ce_all;
1289       target->ce_all.cl_next = NIL(LINK);
1290       target->ce_set = NIL(CELL);
1291
1292       /* Add all prerequisites to edge. */
1293       for(tpq=prereq; tpq; tpq=tpq->ce_link)
1294          Add_prerequisite(edge, tpq, FALSE, TRUE);
1295    }
1296
1297    if( op & R_OP_DCL )
1298    Warning("'::' operator for meta-target '%s' ignored, ':' operator assumed.",
1299        target->CE_NAME );
1300
1301    /* If edge was already added we're in BIG trouble. */
1302    /* Re-use cur as temporary variable. */
1303    for( cur=_sv_edgel; cur != NIL(CELL); cur=cur->ce_link ) {
1304       if( cur == edge )
1305      Fatal( "Internal Error: edge already in _sv_edgel." );
1306    }
1307
1308    edge->ce_link = _sv_edgel;
1309    _sv_edgel = edge;
1310    _sv_globprq_only = 0;
1311
1312    DB_RETURN(NIL(CELL));
1313 }
1314
1315
1316 static CELLPTR
1317 _make_multi( tg )/*
1318 ===================
1319    This function is called to convert tg into an F_MULTI target.
1320    Return a pointer to the new member cell.
1321    I don't know what the author intended but the ce_index entry is only
1322    used in this function (set to 0 for added targets) and undefined otherwise!
1323    The undefined value is hopefully set to 0 by the C compiler as each added
1324    target sets its ce_count to ++ce_index (==1). (FIXME) */
1325 CELLPTR tg;
1326 {
1327    CELLPTR cp;
1328
1329    /* This creates a new master F_MULTI target if tg existed before as a normal
1330     * target with prerequisites or recipes. */
1331    if( !(tg->ce_flag & F_MULTI) && (tg->ce_prq || tg->ce_recipe) ) {
1332       /* Allocate a new master cell. */
1333       TALLOC(cp, 1, CELL);
1334       *cp = *tg;
1335
1336       /* F_MULTI master */
1337       tg->ce_prq    = NIL(LINK);
1338       tg->ce_flag  |= F_RULES|F_MULTI|F_TARGET;
1339       tg->ce_attr  |= A_SEQ;
1340       tg->ce_recipe = NIL(STRING);
1341       tg->ce_dir    = NIL(char);
1342
1343       /* F_MULTI member for preexisting elements */
1344       cp->ce_count  = ++tg->ce_index;
1345       cp->ce_cond   = NIL(STRING);
1346       cp->ce_set    = NIL(CELL);
1347       cp->ce_all.cl_prq = cp;
1348       CeNotMe(cp)   = NIL(LINK);
1349
1350       Add_prerequisite(tg, cp, FALSE, TRUE);
1351    }
1352
1353    /* Alocate memory for new member of F_MULTI target */
1354    TALLOC(cp, 1, CELL);
1355    *cp = *tg;
1356
1357    /* This is reached if the target already exists, but without having
1358     * prerequisites or recepies. Morph it into a F_MULTI master cell. */
1359    if( !(tg->ce_flag & F_MULTI) ) {
1360       tg->ce_prq    = NIL(LINK);
1361       tg->ce_flag  |= F_RULES|F_MULTI|F_TARGET;
1362       tg->ce_attr  |= A_SEQ;
1363       tg->ce_recipe = NIL(STRING);
1364       tg->ce_dir    = NIL(char);
1365       cp->ce_cond   = NIL(STRING);
1366    }
1367    /* This handles the case of adding an additional target as a
1368     * prerequisite to a F_MULTI target. */
1369    else {
1370       cp->ce_flag  &= ~(F_RULES|F_MULTI);
1371       cp->ce_attr  &= ~A_SEQ;
1372       cp->ce_prq    = NIL(LINK);
1373       cp->ce_index  = 0;
1374       cp->ce_cond   = NIL(STRING);
1375    }
1376    cp->ce_count = ++tg->ce_index;
1377    cp->ce_flag |= F_TARGET;
1378    cp->ce_set   = NIL(CELL);
1379    cp->ce_all.cl_prq = cp;
1380    CeNotMe(cp)  = NIL(LINK);
1381
1382    Add_prerequisite(tg, cp, FALSE, TRUE);
1383    return(cp);
1384 }
1385
1386
1387 static void
1388 _add_indirect_prereq( pq )/*
1389 ==========================
1390    Prerequisite is an indirect prerequisite for a %-target, add it to
1391    the target's list of indirect prerequsites to add on match. */
1392 CELLPTR pq;
1393 {
1394    register LINKPTR ln;
1395
1396    /* Only add to list of indirect prerequsites if it is not in already. */
1397    for(ln=_sv_ind_prq; ln; ln=ln->cl_next)
1398       if(strcmp(ln->cl_prq->CE_NAME,pq->CE_NAME) == 0)
1399      return;
1400
1401    /* Not in, add it. */
1402    TALLOC( ln, 1, LINK );
1403    ln->cl_next = _sv_ind_prq;
1404    ln->cl_prq  = pq;
1405    _sv_ind_prq = ln;
1406 }
1407
1408
1409
1410 static void
1411 _set_attributes( attr, set_dir, cp )/*
1412 ======================================
1413     Set the appropriate attributes for a cell */
1414 t_attr  attr;
1415 char    *set_dir;
1416 CELLPTR cp;
1417 {
1418    char   *dir = 0;
1419
1420    DB_ENTER( "_set_attributes" );
1421
1422    /* If .SETDIR attribute is set then we have at least .SETDIR= in the
1423     * set_dir string.  So go and fishout what is at the end of the =.
1424     * If not set and not NULL then propagate it to the target cell. */
1425
1426    if( attr & A_SETDIR ) {
1427       char *p;
1428       if( (p = strchr( set_dir, '=' )) != NULL )
1429          dir = p + 1;
1430
1431       if( cp->ce_dir )
1432      Warning( "Multiple .SETDIR for %s ignored", cp->CE_NAME );
1433       else if( *dir )
1434          cp->ce_dir = DmStrDup(dir);
1435    }
1436    cp->ce_attr |= attr;     /* set rest of attributes for target */
1437
1438    DB_VOID_RETURN;
1439 }
1440
1441
1442
1443 static void
1444 _set_global_attr( attr )/*
1445 ==========================
1446     Handle the setting of the global attribute functions based on
1447     The attribute flags set in attr. */
1448 t_attr attr;
1449 {
1450    t_attr flag;
1451
1452    /* Some compilers can't handle a switch on a long, and t_attr is now a long
1453     * integer on some systems.  foey! */
1454    for( flag = MAX_ATTR; flag; flag >>= 1 )
1455       if( flag & attr ) {
1456      if( flag == A_PRECIOUS)      Def_macro(".PRECIOUS",  "y", M_EXPANDED);
1457      else if( flag == A_SILENT)   Def_macro(".SILENT",    "y", M_EXPANDED);
1458      else if( flag == A_IGNORE )  Def_macro(".IGNORE",    "y", M_EXPANDED);
1459      else if( flag == A_EPILOG )  Def_macro(".EPILOG",    "y", M_EXPANDED);
1460      else if( flag == A_PROLOG )  Def_macro(".PROLOG",    "y", M_EXPANDED);
1461      else if( flag == A_NOINFER ) Def_macro(".NOINFER",   "y", M_EXPANDED);
1462      else if( flag == A_SEQ )     Def_macro(".SEQUENTIAL","y", M_EXPANDED);
1463      else if( flag == A_SHELL )   Def_macro(".USESHELL",  "y", M_EXPANDED);
1464      else if( flag == A_MKSARGS ) Def_macro(".MKSARGS",   "y", M_EXPANDED);
1465 #if !defined(__CYGWIN__)
1466      else if( flag == A_SWAP )    Def_macro(".SWAP",      "y", M_EXPANDED);
1467 #else
1468      else if( flag == A_WINPATH ) Def_macro(".WINPATH",   "y", M_EXPANDED);
1469 #endif
1470       }
1471
1472    attr &= ~A_GLOB;
1473    if( attr ) Warning( "Non global attribute(s) ignored" );
1474 }
1475
1476
1477
1478 static void
1479 _stick_at_head( cp, pq )/*
1480 ==========================
1481     Add the prerequisite list to the head of the existing prerequisite
1482     list */
1483
1484 CELLPTR cp;         /* cell for target node */
1485 CELLPTR pq;     /* list of prerequisites to add */
1486 {
1487    DB_ENTER( "_stick_at_head" );
1488
1489    if( pq->ce_link != NIL(CELL) ) _stick_at_head( cp, pq->ce_link );
1490    Add_prerequisite( cp, pq, TRUE, FALSE );
1491
1492    DB_VOID_RETURN;
1493 }
1494
1495
1496
1497 static t_attr
1498 _is_attribute( name )/*
1499 =======================
1500    Check the passed name against the list of valid attributes and return the
1501    attribute index if it is, else return 0, indicating the name is not a valid
1502    attribute.  The present attributes are defined in dmake.h as A_xxx #defines,
1503    with the corresponding makefile specification:  (note they must be named
1504    exactly as defined below)
1505
1506    Valid attributes are:  .IGNORE, .SETDIR=, .SILENT, .PRECIOUS, .LIBRARY,
1507                           .EPILOG, .PROLOG,  .LIBRARYM, .SYMBOL, .UPDATEALL,
1508               .USESHELL, .NOINFER, .PHONY, .SWAP/.WINPATH, .SEQUENTIAL
1509               .NOSTATE,  .MKSARGS, .IGNOREGROUP, .GROUP, .FIRST
1510               .EXECUTE, .ERRREMOVE
1511
1512    NOTE:  The strcmp's are OK since at most three are ever executed for any
1513           one attribute check, and that happens only when we can be fairly
1514           certain we have an attribute.  */
1515 char *name;
1516 {
1517    t_attr attr = 0;
1518
1519    DB_ENTER( "_is_attribute" );
1520
1521    if( *name++ == '.' )
1522       switch( *name )
1523       {
1524          case 'E':
1525         if( !strcmp(name, "EPILOG") )           attr = A_EPILOG;
1526         else if( !strcmp(name, "EXECUTE"))      attr = A_EXECUTE;
1527         else if( !strcmp(name, "ERRREMOVE"))    attr = A_ERRREMOVE;
1528         else attr = 0;
1529         break;
1530
1531      /* A_FIRST implies A_IGNORE, handled in ST_INCLUDE */
1532          case 'F':
1533         attr = (strcmp(name, "FIRST")) ? 0 : A_FIRST;
1534         break;
1535
1536      case 'G': attr = (strcmp(name, "GROUP"))    ? 0 : A_GROUP;   break;
1537          case 'L': attr = (strcmp(name, "LIBRARY"))  ? 0 : A_LIBRARY; break;
1538          case 'M': attr = (strcmp(name, "MKSARGS"))  ? 0 : A_MKSARGS; break;
1539
1540          case 'I':
1541         if( !strcmp(name, "IGNORE") )           attr = A_IGNORE;
1542         else if( !strcmp(name, "IGNOREGROUP"))  attr = A_IGNOREGROUP;
1543         else attr = 0;
1544         break;
1545
1546          case 'N':
1547         if( !strcmp(name, "NOINFER") )      attr = A_NOINFER;
1548         else if( !strcmp(name, "NOSTATE"))  attr = A_NOSTATE;
1549         else attr = 0;
1550         break;
1551
1552          case 'U':
1553         if( !strcmp(name, "UPDATEALL") )    attr = A_UPDATEALL;
1554         else if( !strcmp(name, "USESHELL")) attr = A_SHELL;
1555         else attr = 0;
1556         break;
1557
1558          case 'P':
1559             if( !strcmp(name, "PRECIOUS") )     attr = A_PRECIOUS;
1560             else if( !strcmp(name, "PROLOG") )  attr = A_PROLOG;
1561             else if( !strcmp(name, "PHONY") )   attr = A_PHONY;
1562             else attr = 0;
1563             break;
1564
1565          case 'S':
1566             if( !strncmp(name, "SETDIR=", 7) )    attr = A_SETDIR;
1567             else if( !strcmp(name, "SILENT") )    attr = A_SILENT;
1568             else if( !strcmp(name, "SYMBOL") )    attr = A_SYMBOL;
1569             else if( !strcmp(name, "SEQUENTIAL")) attr = A_SEQ;
1570         /* A_SWAP has no meaning except for MSDOS. */
1571             else if( !strcmp(name, "SWAP"))       attr = A_SWAP;
1572             else attr = 0;
1573             break;
1574
1575          case 'W': attr = (strcmp(name, "WINPATH"))  ? 0 : A_WINPATH; break;
1576       }
1577
1578    DB_RETURN( attr );
1579 }
1580
1581
1582
1583 static int
1584 _is_special( tg )/*
1585 ===================
1586    This function returns TRUE if the name passed in represents a special
1587    target, otherwise it returns false.  A special target is one that has
1588    a special meaning to dmake, and may require processing at the time that
1589    it is parsed.
1590
1591    Current Special targets are:
1592     .GROUPPROLOG    .GROUPEPILOG    .INCLUDE    .IMPORT
1593     .EXPORT     .SOURCE     .SUFFIXES   .ERROR        .EXIT
1594     .INCLUDEDIRS    .MAKEFILES  .REMOVE     .KEEP_STATE
1595     .TARGETS    .ROOT
1596 */
1597 char *tg;
1598 {
1599    DB_ENTER( "_is_special" );
1600
1601    if( *tg++ != '.' ) DB_RETURN( 0 );
1602
1603    switch( *tg )
1604    {
1605       case 'E':
1606          if( !strcmp( tg, "ERROR" ) )       DB_RETURN( ST_REST     );
1607          else if( !strcmp( tg, "EXPORT" ) ) DB_RETURN( ST_EXPORT   );
1608          else if( !strcmp( tg, "EXIT" ) )   DB_RETURN( ST_EXIT     );
1609      break;
1610
1611       case 'G':
1612      if( !strcmp( tg, "GROUPPROLOG" ))      DB_RETURN( ST_REST     );
1613      else if( !strcmp( tg, "GROUPEPILOG" )) DB_RETURN( ST_REST     );
1614      break;
1615
1616       case 'I':
1617          if( !strcmp( tg, "IMPORT" ) )      DB_RETURN( ST_IMPORT   );
1618          else if( !strcmp( tg, "INCLUDE" ) )    DB_RETURN( ST_INCLUDE  );
1619      else if( !strcmp( tg, "INCLUDEDIRS" )) DB_RETURN( ST_REST     );
1620      break;
1621
1622       case 'K':
1623          if( !strcmp( tg, "KEEP_STATE" ) )  DB_RETURN( ST_KEEP     );
1624      break;
1625
1626       case 'M':
1627          if( !strcmp( tg, "MAKEFILES" ) )   DB_RETURN( ST_REST     );
1628      break;
1629
1630       case 'R':
1631          if( !strcmp( tg, "REMOVE" ) )      DB_RETURN( ST_REST     );
1632          else if( !strcmp( tg, "ROOT" ) )   DB_RETURN( ST_REST     );
1633      break;
1634
1635       case 'S':
1636          if( !strncmp( tg, "SOURCE", 6 ) )  DB_RETURN( ST_SOURCE   );
1637          else if( !strncmp(tg, "SUFFIXES", 8 )) {
1638             if  (Verbose & V_WARNALL)
1639                Warning( "The .SUFFIXES target has no special meaning and is deprecated." );
1640             DB_RETURN( ST_SOURCE   );
1641      }
1642      break;
1643
1644       case 'T':
1645          if( !strcmp( tg, "TARGETS" ) )     DB_RETURN( ST_REST     );
1646      break;
1647    }
1648
1649    DB_RETURN( 0 );
1650 }
1651
1652
1653
1654 static int
1655 _is_percent( np )/*
1656 ===================
1657     return TRUE if np points at a string containing a % sign */
1658 char *np;
1659 {
1660    return( (strchr(np,'%') && (*np != '\'' && np[strlen(np)-1] != '\'')) ?
1661        TRUE : FALSE );
1662 }
1663
1664
1665 static char *
1666 _is_magic( np )/*
1667 =================
1668    return NULL if np does not points at a string of the form
1669       .<chars>.<chars>  or  .<chars>
1670    where chars are "visible characters" for the current locale. If np is of the
1671    first form we return a pointer to the second '.' and for the second form we
1672    return a pointer to the '.'.
1673
1674    NOTE:  reject target if it contains / or begins with ..
1675           reject also .INIT and .DONE because they are mentioned in the
1676           man page. */
1677 char *np;
1678 {
1679    register char *n;
1680
1681    n = np;
1682    if( *n != '.' ) return( NIL(char) );
1683    if (strchr(DirBrkStr, *(n+1))!=NULL || *(n+1) == '.' )
1684       return (NIL(char));
1685    if( !strcmp( n+1, "INIT" ) || !strcmp( n+1, "DONE" ) )
1686       return (NIL(char));
1687
1688    for( n++; isgraph(*n) && (*n != '.'); n++ );
1689
1690    if( *n != '\0' ) {
1691       if( *n != '.' )  return( NIL(char) );
1692       for( np = n++; isgraph( *n ) && (*n != '.'); n++ );
1693       if( *n != '\0' ) return( NIL(char) );
1694    }
1695    /* Until dmake 4.5 a .<suffix> target was ignored when AUGMAKE was
1696     * set and evaluated as a meta target if unset (also for -A).
1697     * To keep maximum compatibility accept this regardles of the AUGMAKE
1698     * status. */
1699
1700    /* np points at the second . of .<chars>.<chars> string.
1701     * if the special target is of the form .<chars> then np points at the
1702     * first . in the token. */
1703
1704    return( np );
1705 }
1706
1707
1708 static int
1709 _add_root(tg)/*
1710 ===============
1711    Adds "tg" to the prerequisits list of "Targets" if "Target" is not TRUE,
1712    i.e. to the list of targets that are to be build.
1713    Instead io setting "Target" to TRUE, TRUE is returned as more targets
1714    might be defined in the current makefile line and they all have to be
1715    add to "Targets" in this case.  */
1716
1717 CELLPTR tg;
1718 {
1719    int res = FALSE;
1720
1721    if(tg == Targets)
1722       return(TRUE);
1723
1724    if( !Target && !(tg->ce_flag & (F_SPECIAL|F_PERCENT)) ) {
1725       Add_prerequisite(Targets, tg, FALSE, TRUE);
1726
1727       tg->ce_flag |= F_TARGET;
1728       tg->ce_attr |= A_FRINGE;
1729       res          = TRUE;
1730    }
1731
1732    return(res);
1733 }