context.c Source File

00001 /*
00002 ** LCLint - annotation-assisted static program checker
00003 ** Copyright (C) 1994-2000 University of Virginia,
00004 **         Massachusetts Institute of Technology
00005 **
00006 ** This program is free software; you can redistribute it and/or modify it
00007 ** under the terms of the GNU General Public License as published by the
00008 ** Free Software Foundation; either version 2 of the License, or (at your
00009 ** option) any later version.
00010 ** 
00011 ** This program is distributed in the hope that it will be useful, but
00012 ** WITHOUT ANY WARRANTY; without even the implied warranty of
00013 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014 ** General Public License for more details.
00015 ** 
00016 ** The GNU General Public License is available from http://www.gnu.org/ or
00017 ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
00018 ** MA 02111-1307, USA.
00019 **
00020 ** For information on lclint: lclint-request@cs.virginia.edu
00021 ** To report a bug: lclint-bug@cs.virginia.edu
00022 ** For more information: http://lclint.cs.virginia.edu
00023 */
00024 /*
00025 ** context.c
00026 */
00027 /*
00028  * Modified by Herbert 04/19/97:
00029  * - added include for new header portab.h containing OS dependent stuff.
00030  * - changed occurrances of '/' as path delimiters to macro from portab.h
00031  * - changed the handling of the tmp directory -- will no longer always be
00032  *   ".", if possible, environment variables "TMP" or, if not set, "TMP", 
00033  *   or, if not set "." will be used.
00034  */
00035 
00036 # include "lclintMacros.nf"
00037 # include "llbasic.h"
00038 
00039 # ifndef NOLCL
00040 # include "usymtab_interface.h"
00041 # endif
00042 
00043 # include "exprChecks.h"
00044 # include "filelocStack.h"
00045 # include "fileIdList.h"
00046 # include "llmain.h"
00047 # include "intSet.h"
00048 # include "osd.h"
00049 # include "portab.h"
00050 
00051 extern /*@external@*/ int yydebug;
00052 
00053 typedef struct
00054 { 
00055   cstring file; 
00056   typeIdSet daccess ; 
00057 } maccesst;
00058 
00059 typedef enum { 
00060   CX_GLOBAL, CX_INNER, 
00061   CX_FUNCTION, CX_FCNDECL,
00062   CX_MACROFCN, CX_MACROCONST, CX_UNKNOWNMACRO, 
00063   CX_ITERDEF, CX_ITEREND,
00064   CX_LCL, CX_LCLLIB
00065 } kcontext;
00066 
00067 static struct _context
00068 {
00069   int linesprocessed;
00070   int speclinesprocessed;
00071 
00072   flagMarkerList markers;
00073 
00074   /*
00075   **  used to record state where a macro must match a function name
00076   **   (i.e., no params were listed in the macro definition
00077   */
00078 
00079   bool macroMissingParams BOOLBITS;
00080   bool preprocessing BOOLBITS;
00081   bool incommandline BOOLBITS;
00082   bool insuppressregion  BOOLBITS;
00083   bool inDerivedFile BOOLBITS;
00084   bool instandardlib  BOOLBITS;
00085   bool inimport  BOOLBITS;
00086   bool inheader  BOOLBITS;
00087   bool inmacrocache  BOOLBITS;
00088   bool protectVars  BOOLBITS;
00089   bool neednl  BOOLBITS;
00090   bool showfunction  BOOLBITS;
00091   bool savedFlags  BOOLBITS;
00092   bool justpopped  BOOLBITS;
00093   bool anyExports BOOLBITS;
00094 
00095   flagcode library;
00096 
00097   ynm isNullGuarded;
00098   fileloc saveloc;
00099   fileloc pushloc;
00100 
00101   clauseStack clauses; 
00102   clause inclause;
00103 
00104   int numerrors;
00105 
00106   filelocStack locstack;
00107   fileTable ftab;
00108   cstring msgAnnote;
00109   /*@observer@*/ sRef aliasAnnote;
00110   /*@observer@*/ sRef aliasAnnoteAls;
00111   messageLog  msgLog;
00112 
00113   macrocache  mc;
00114   /*@observer@*/ sRefSet mods;
00115 
00116   /* file access types */
00117   typeIdSet facct;   
00118 
00119   /* local access types (this function) */
00120   typeIdSet acct;  
00121 
00122   /* no access types (@noaccess) */
00123   typeIdSet nacct; 
00124 
00125   /*@observer@*/ globSet globs;
00126   /*@only@*/ globSet globs_used;
00127   
00128   int nmods;
00129   int maxmods;
00130   /*@reldef@*/ maccesst *moduleaccess; /* Not defined is nmods == 0. */
00131   
00132   kcontext kind;
00133 
00134   ctype boolType;
00135 
00136   bool flags[NUMFLAGS];
00137   bool saveflags[NUMFLAGS];
00138   bool setGlobally[NUMFLAGS];
00139   bool setLocally[NUMFLAGS];
00140 
00141   int values[NUMVALUEFLAGS];
00142   int counters[NUMVALUEFLAGS];
00143 
00144   o_cstring strings[NUMSTRINGFLAGS];
00145   sRefSetList modrecs;
00146 
00147   union 
00148     {
00149       bool glob;
00150       int  cdepth;
00151       /*@dependent@*/ /*@exposed@*/ uentry  fcn;
00152     } cont;
00153 } gc;
00154 
00155 static /*@exposed@*/ cstring context_exposeString (flagcode p_flag) ;
00156 static void context_restoreFlagSettings (void) /*@modifies gc@*/ ;
00157 static void context_saveFlagSettings (void) /*@modifies gc@*/ ;
00158 static void context_exitClauseAux (exprNode p_pred, exprNode p_tbranch)
00159    /*@modifies gc@*/ ;
00160 static void context_exitClauseSimp (void)  /*@modifies gc@*/ ;
00161 static void context_exitClausePlain (void) /*@modifies gc@*/ ;
00162 static void context_setJustPopped (void) /*@modifies gc.justpopped@*/ ;
00163 static void context_setValue (flagcode p_flag, int p_val) /*@modifies gc.flags@*/ ;
00164 static void context_setFlag (flagcode p_f, bool p_b)
00165   /*@modifies gc.flags@*/ ;
00166 
00167 static void
00168   context_setFlagAux (flagcode p_f, bool p_b, bool p_inFile, bool p_isRestore)
00169   /*@modifies gc.flags@*/ ;
00170 
00171 static void context_restoreFlag (flagcode p_f) /*@modifies gc.flags@*/ ;
00172 
00173 /*@+enumindex@*/ 
00174 
00175 cstring context_unparseFlagMarkers ()
00176 {
00177   return (flagMarkerList_unparse (gc.markers));
00178 }
00179 
00180 void context_setPreprocessing (void)
00181 {
00182   llassert (!gc.preprocessing);
00183   gc.preprocessing = TRUE;
00184 }
00185 
00186 void context_clearPreprocessing (void)
00187 {
00188   llassert (gc.preprocessing);
00189   gc.preprocessing = FALSE;
00190 }
00191 
00192 bool context_isPreprocessing (void)
00193 {
00194   return gc.preprocessing;
00195 }
00196 
00197 void context_setInCommandLine (void)
00198 {
00199   llassert (!gc.incommandline);
00200   gc.incommandline = TRUE;
00201 }
00202 
00203 void context_clearInCommandLine (void)
00204 {
00205   llassert (gc.incommandline);
00206   gc.incommandline = FALSE;
00207 }
00208 
00209 bool context_isInCommandLine (void)
00210 {
00211   return gc.incommandline;
00212 }
00213 
00214 static
00215 void pushClause (clause c) /*@modifies gc.clauses, gc.inclause@*/
00216 {
00217   gc.inclause = c;
00218   clauseStack_push (gc.clauses, c);
00219 
00220   if (clause_isConditional (c)
00221       && context_getFlag (FLG_CONTROLNESTDEPTH))
00222     {
00223       int maxdepth = context_getValue (FLG_CONTROLNESTDEPTH);
00224       int depth = clauseStack_controlDepth (gc.clauses);
00225       
00226       if (depth == maxdepth + 1)
00227         {
00228           voptgenerror 
00229             (FLG_CONTROLNESTDEPTH,
00230              message ("Maximum control nesting depth "
00231                       "(%d) exceeded",
00232                       maxdepth),
00233              g_currentloc);
00234         }
00235     }
00236 }
00237 
00238 static
00239 clause topClause (clauseStack s) /*@*/
00240 {
00241   if (clauseStack_isEmpty (s)) return NOCLAUSE;
00242   return ((clause) clauseStack_top (s));
00243 }
00244 
00245 void
00246 context_addMacroCache (/*@only@*/ cstring def)
00247 {
00248     macrocache_addEntry (gc.mc, fileloc_copy (g_currentloc), def);
00249 }
00250 
00251 void
00252 context_addComment (/*@only@*/ cstring def)
00253 {
00254     macrocache_addComment (gc.mc, fileloc_copy (g_currentloc), def);
00255 }
00256 
00257 /*
00258 ** returns TRUE is fl is in ignore region, or region where -code
00259 **
00260 ** the logic is fuzzy...
00261 */
00262 
00263 static bool
00264 context_inSuppressFlagZone (fileloc fl, flagcode code)
00265 {
00266   ynm ret = flagMarkerList_suppressError (gc.markers, code, fl);
00267   bool res = FALSE;
00268   
00269   if (ynm_isMaybe (ret))
00270     {
00271       /*
00272       ** whas is dis?
00273       */
00274 
00275       if (gc.savedFlags)
00276         {
00277           res = !gc.saveflags[code];
00278         }
00279       else
00280         {
00281           res = !context_getFlag (code);
00282         }
00283     }
00284   else
00285     {
00286       res = ynm_toBoolStrict (ret);
00287     }
00288   
00289     return res;
00290 }
00291 
00292 static bool
00293 context_suppressSystemMsg (fileloc fl)
00294 {
00295   if (context_getFlag (FLG_SYSTEMDIRERRORS))
00296     {
00297       return FALSE;
00298     }
00299   else
00300     {
00301       return (fileloc_isSystemFile (fl));
00302     }
00303 }
00304 
00305 bool 
00306 context_suppressFlagMsg (flagcode flag, fileloc fl)
00307 {
00308   if (context_suppressSystemMsg (fl))
00309     {
00310       return TRUE;
00311     }
00312 
00313   /* want same object compare here */
00314 
00315   if (fileloc_equal (fl, g_currentloc) || gc.inDerivedFile)
00316     {
00317       return (!context_getFlag (flag)
00318               || context_inSuppressRegion ()
00319               || context_inSuppressZone (fl)
00320               || (gc.inDerivedFile && context_inSuppressFlagZone (fl, flag)));
00321     }
00322   else
00323     {
00324             return (context_inSuppressFlagZone (fl, flag));
00325     }
00326 }
00327 
00328 bool 
00329 context_suppressNotFlagMsg (flagcode flag, fileloc fl)
00330 {
00331   
00332   if (context_suppressSystemMsg (fl))
00333     {
00334       return TRUE;
00335     }
00336 
00337   /*@access fileloc@*/ 
00338   if (fl == g_currentloc)
00339     /*@noaccess fileloc@*/
00340     {
00341       return (context_getFlag (flag) || context_inSuppressRegion ());
00342     }
00343   else
00344     {
00345       /* for now... */
00346       return (context_getFlag (flag) || context_inSuppressRegion ());
00347     }
00348 }
00349 
00350 bool
00351 context_inSuppressZone (fileloc fl) 
00352 {
00353   if (context_suppressSystemMsg (fl))
00354     {
00355       return TRUE;
00356     }
00357 
00358   return (flagMarkerList_inIgnore (gc.markers, fl));
00359 }
00360 
00361 bool
00362 context_inSuppressRegion (void)
00363 {
00364   return (gc.insuppressregion);
00365 }
00366 
00367 void
00368 context_enterSuppressRegion (void)
00369 {
00370   if (gc.insuppressregion)
00371     {
00372       gc.insuppressregion = FALSE;      /* get this msg! */
00373       llmsg (message
00374              ("%q: New ignore errors region entered while in ignore errors region",
00375               fileloc_unparse (g_currentloc)));
00376     }
00377   
00378   gc.insuppressregion = TRUE;
00379   flagMarkerList_add (gc.markers, flagMarker_createIgnoreOn (g_currentloc));
00380 }
00381 
00382 static void
00383 context_addFlagMarker (flagcode code, ynm set)
00384 {
00385   flagMarkerList_add (gc.markers,
00386                       flagMarker_createLocalSet (code, set, g_currentloc));
00387 }
00388 
00389 void
00390 context_enterSuppressLine (int count)
00391 {
00392   fileloc nextline = fileloc_copy (g_currentloc);
00393 
00394   flagMarkerList_add (gc.markers,
00395                       flagMarker_createIgnoreCount (count, g_currentloc));
00396 
00397   fileloc_nextLine (nextline);
00398   flagMarkerList_add (gc.markers,
00399                       flagMarker_createIgnoreOff (nextline));
00400   fileloc_free (nextline);
00401 }
00402 
00403 void context_checkSuppressCounts (void)
00404 {
00405   if (context_getFlag (FLG_SUPCOUNTS))
00406     {
00407       flagMarkerList_checkSuppressCounts (gc.markers);
00408     }
00409 }
00410 
00411 void context_incLineno (void)
00412 {
00413   gc.linesprocessed++;
00414   incLine ();
00415 }
00416 
00417 void
00418 context_exitSuppressRegion (void)
00419 {
00420   if (!gc.insuppressregion)
00421     {
00422       llerrorlit (FLG_SYNTAX, 
00423                   "End ignore errors in region while not ignoring errors");
00424     }
00425 
00426     gc.insuppressregion = FALSE;
00427   flagMarkerList_add (gc.markers, flagMarker_createIgnoreOff (g_currentloc));
00428 }
00429 
00430 # ifndef NOLCL
00431 void
00432 context_enterLCLfile (void)
00433 {
00434   gc.kind = CX_LCL;
00435   gc.facct = typeIdSet_emptySet ();
00436 }
00437 # endif
00438 
00439 static void
00440 addModuleAccess (/*@only@*/ cstring fname, typeIdSet mods)
00441 {
00442   int i;
00443 
00444   for (i = 0; i < gc.nmods; i++)
00445     {
00446       if (cstring_equal (gc.moduleaccess[i].file, fname))
00447         {
00448           gc.moduleaccess[i].daccess = typeIdSet_union (gc.moduleaccess[i].daccess, mods);
00449           cstring_free (fname);
00450           return;
00451         }
00452     }
00453   
00454   if (gc.nmods == gc.maxmods)
00455     {
00456       maccesst *oldmods;
00457       
00458       gc.maxmods = gc.maxmods + DEFAULTMAXMODS;      
00459       oldmods = gc.moduleaccess;
00460       
00461       gc.moduleaccess = (maccesst *) dmalloc (sizeof (*gc.moduleaccess) * (gc.maxmods));
00462       
00463       for (i = 0; i < gc.nmods; i++)
00464         {
00465           gc.moduleaccess[i] = oldmods[i];
00466         }
00467       
00468       sfree (oldmods);
00469     }
00470   
00471   gc.moduleaccess[gc.nmods].file = fname;
00472   gc.moduleaccess[gc.nmods].daccess = mods;
00473   
00474   gc.nmods++;
00475 }
00476 
00477 static void
00478 insertModuleAccess (cstring fname, typeId t)
00479 {
00480   int i;
00481   
00482   for (i = 0; i < gc.nmods; i++)
00483     {
00484       if (cstring_equal (gc.moduleaccess[i].file, fname))
00485         {
00486           gc.moduleaccess[i].daccess = typeIdSet_insert (gc.moduleaccess[i].daccess, t);
00487           break;
00488         }
00489     }
00490   
00491     addModuleAccess (cstring_copy (fname), typeIdSet_single (t));
00492 }
00493 
00494 # ifndef NOLCL
00495 void
00496 context_exitLCLfile (void)
00497 {
00498   if (gc.kind != CX_LCLLIB)
00499     {
00500       char *lclname =  
00501         removeExtension (cstring_toCharsSafe 
00502                          (fileName (currentFile ())), ".lcl"); 
00503       
00504       addModuleAccess (cstring_fromCharsO (removePath (lclname)), gc.facct);
00505       
00506       mstring_free (lclname);
00507     }
00508   
00509   gc.kind = CX_LCL;
00510   gc.kind = CX_GLOBAL;
00511   gc.facct = typeIdSet_emptySet ();
00512 }
00513 # endif
00514 
00515 void
00516 context_dumpModuleAccess (FILE *fout)
00517 {
00518   int i = 0;
00519 
00520   for (i = 0; i < gc.nmods; i++)
00521     {
00522       cstring td = typeIdSet_dump (gc.moduleaccess[i].daccess);
00523 
00524       fprintf (fout, "%s#%s@\n", 
00525                cstring_toCharsSafe (gc.moduleaccess[i].file), 
00526                cstring_toCharsSafe (td));
00527       
00528       cstring_free (td);
00529     }
00530 }
00531 
00532 bool context_usingPosixLibrary ()
00533 {
00534   return (gc.library == FLG_POSIXLIB 
00535           || gc.library == FLG_POSIXSTRICTLIB
00536           || gc.library == FLG_UNIXLIB
00537           || gc.library == FLG_UNIXSTRICTLIB);
00538 }
00539 
00540 bool context_usingAnsiLibrary ()
00541 {
00542   return (gc.library != FLG_NOLIB);
00543 }
00544 
00545 flagcode context_getLibrary ()
00546 {
00547   return gc.library;
00548 }
00549 
00550 void context_setLibrary (flagcode code)
00551 {
00552   gc.library = code;
00553 }
00554 
00555 /*@observer@*/ char *context_selectedLibrary ()
00556 {
00557   switch (gc.library)
00558     {
00559     case FLG_STRICTLIB:
00560       return LLSTRICTLIBS_NAME;
00561     case FLG_POSIXLIB:
00562       return LLPOSIXLIBS_NAME;
00563     case FLG_POSIXSTRICTLIB:
00564       return LLPOSIXSTRICTLIBS_NAME;
00565     case FLG_UNIXLIB:
00566       return LLUNIXLIBS_NAME;    
00567     case FLG_UNIXSTRICTLIB:
00568       return LLUNIXSTRICTLIBS_NAME;
00569     case FLG_ANSILIB:
00570       return LLSTDLIBS_NAME;
00571     BADDEFAULT;
00572     }
00573 }
00574   
00575 
00576 void
00577 context_loadModuleAccess (FILE *in)
00578 {
00579   char *s = mstring_create (MAX_DUMP_LINE_LENGTH);
00580   char *lasts = s;
00581   char *name = mstring_create (MAX_NAME_LENGTH);
00582   char *oname = name;
00583 # ifndef NOFREE
00584   char *os = s;
00585 # endif
00586 
00587   while (fgets (s, MAX_DUMP_LINE_LENGTH, in) != NULL 
00588          && *s == ';')
00589     {
00590       ;
00591     }
00592 
00593   while (s != NULL && *s != ';' && *s != '\0')
00594     {
00595       name = oname;
00596       
00597       while (*s != '#' && *s != '\0')
00598         {
00599           *name++ = *s++;
00600         }
00601 
00602       *name = '\0';
00603 
00604       if (*s != '#')
00605         {
00606           llcontbug (message ("context_loadModuleAccess: bad library line: %s\n", 
00607                               cstring_fromChars (s)));
00608           break;
00609         }
00610 
00611       s++;
00612 
00613       addModuleAccess (cstring_copy (cstring_fromChars (oname)), 
00614                        typeIdSet_undump (&s)); 
00615 
00616       (void) fgets (s, MAX_DUMP_LINE_LENGTH, in);
00617       llassert (s != lasts);
00618       lasts = s;
00619     }
00620 
00621   sfree (oname);
00622 # ifndef NOFREE
00623   sfree (os);
00624 # endif
00625 }
00626 
00627 typeIdSet context_fileAccessTypes (void)
00628 {
00629   return gc.facct;
00630 }
00631 
00632 void
00633 context_resetModeFlags (void)
00634 {
00635   
00636   allFlagCodes (code)
00637     {
00638       if (flagcode_isModeFlag (code))
00639         {
00640           context_setFlag (code, FALSE);
00641         }
00642     } end_allFlagCodes;
00643 
00644   }
00645 
00646 /*
00647 ** resetAllFlags
00648 **
00649 ** Set all flags to FALSE, except for a few which are
00650 ** true by default.
00651 **
00652 ** Set all values and strings to appropriate defaults.
00653 ** Set all counters to 0.
00654 */
00655 
00656 static void
00657 conext_resetAllCounters (void)
00658 {
00659   int i;
00660 
00661   for (i = 0; i < NUMVALUEFLAGS; i++)
00662     {
00663       gc.counters[i] = 0;
00664     }
00665 }
00666 
00667 void
00668 context_resetAllFlags (void)
00669 {
00670   allFlagCodes (code)
00671     {
00672       gc.flags[code] = FALSE;
00673 
00674       if (flagcode_hasValue (code))
00675         {
00676           int val = 0;
00677           
00678           /*@-loopswitchbreak@*/
00679           switch (code)
00680             {
00681             case FLG_LIMIT: 
00682               val = DEFAULT_LIMIT; break;
00683             case FLG_LINELEN: 
00684               val = DEFAULT_LINELEN; break;
00685             case FLG_EXTERNALNAMELEN:
00686               val = DEFAULT_EXTERNALNAMELEN; break;
00687             case FLG_INTERNALNAMELEN:
00688               val = DEFAULT_INTERNALNAMELEN; break;
00689             case FLG_COMMENTCHAR: 
00690               val = (int) DEFAULT_COMMENTCHAR; break;
00691             case FLG_CONTROLNESTDEPTH:
00692               val = (int) DEFAULT_CONTROLNESTDEPTH; break;
00693             case FLG_STRINGLITERALLEN:
00694               val = (int) DEFAULT_STRINGLITERALLEN; break;
00695             case FLG_INCLUDENEST:
00696               val = (int) DEFAULT_INCLUDENEST; break;
00697             case FLG_NUMSTRUCTFIELDS:
00698               val = (int) DEFAULT_NUMSTRUCTFIELDS; break;
00699             case FLG_NUMENUMMEMBERS:
00700               val = (int) DEFAULT_NUMENUMMEMBERS; break;
00701             case FLG_EXPECT:
00702             case FLG_LCLEXPECT:
00703               break;
00704             default:
00705               llbug (message ("Bad value flag: %s", flagcode_unparse (code)));
00706             }
00707           /*@=loopswitchbreak@*/          
00708 
00709           context_setValue (code, val);
00710         }
00711       else if (flagcode_hasString (code))
00712         {
00713           cstring val = cstring_undefined;
00714           
00715           switch (code)
00716             { /*@-loopswitchbreak@*/
00717             case FLG_LARCHPATH:
00718               {
00719                 char *larchpath = osd_getEnvironmentVariable (LARCH_PATH);
00720                 
00721                 if (larchpath != NULL)
00722                   {
00723                     val = cstring_fromCharsNew (larchpath);
00724                   }
00725                 else
00726                   {
00727                     val = cstring_makeLiteral (DEFAULT_LARCHPATH);
00728                   }
00729                 
00730                 break;
00731               }
00732             case FLG_LCLIMPORTDIR:
00733               {
00734                 val = cstring_fromCharsNew (osd_getEnvironment (LCLIMPORTDIR, DEFAULT_LCLIMPORTDIR));
00735                 break;
00736               }
00737             case FLG_TMPDIR: 
00738 # if defined(OS2) || defined(MSDOS) || defined(WIN32)
00739               {
00740                 char *env = osd_getEnvironmentVariable ("TMP");
00741 
00742                 if (env == NULL)
00743                   {
00744                     env = osd_getEnvironmentVariable ("TEMP");
00745                   }
00746 
00747                 val = cstring_makeLiteral (env != NULL ? env : DEFAULT_TMPDIR);
00748               }
00749 # else
00750               val = cstring_makeLiteral (DEFAULT_TMPDIR);
00751 # endif /* !defined(OS2) && !defined(MSDOS) */
00752 
00753               break;
00754             case FLG_BOOLTYPE:
00755               val = cstring_makeLiteral (DEFAULT_BOOLTYPE); break;
00756             case FLG_BOOLFALSE:
00757               val = cstring_makeLiteral ("FALSE"); break;
00758             case FLG_BOOLTRUE:
00759               val = cstring_makeLiteral ("TRUE"); break;
00760             case FLG_MACROVARPREFIX: 
00761               val = cstring_makeLiteral ("m_"); break;
00762             case FLG_SYSTEMDIRS:
00763               val = cstring_makeLiteral (DEFAULT_SYSTEMDIR); break;
00764             default:
00765               break;
00766             } /*@=loopswitchbreak@*/
00767           
00768           context_setString (code, val);
00769         }
00770       else
00771         { 
00772           ; /* nothing to set */
00773         }
00774     } end_allFlagCodes;
00775   
00776   /*
00777   ** These flags are true by default.
00778   */
00779 
00780   gc.flags[FLG_MODIFIES] = TRUE;
00781   gc.flags[FLG_NESTCOMMENT] = TRUE;
00782   gc.flags[FLG_GLOBALS] = TRUE;
00783   gc.flags[FLG_FULLINITBLOCK] = TRUE;
00784   gc.flags[FLG_LIKELYBOOL] = TRUE;
00785   gc.flags[FLG_ZEROPTR] = TRUE;
00786   gc.flags[FLG_NUMLITERAL] = TRUE;
00787   gc.flags[FLG_DUPLICATEQUALS] = TRUE;
00788   gc.flags[FLG_SKIPANSIHEADERS] = TRUE;
00789   gc.flags[FLG_SKIPPOSIXHEADERS] = TRUE;
00790   gc.flags[FLG_SYSTEMDIREXPAND] = TRUE;
00791   gc.flags[FLG_UNRECOGCOMMENTS] = TRUE;
00792   gc.flags[FLG_CASTFCNPTR] = TRUE;
00793   gc.flags[FLG_DOLCS] = TRUE;
00794   gc.flags[FLG_USEVARARGS] = TRUE;
00795   gc.flags[FLG_MAINTYPE] = TRUE;
00796   gc.flags[FLG_SPECMACROS] = TRUE;
00797   gc.flags[FLG_REDEF] = TRUE;
00798   gc.flags[FLG_MACRONEXTLINE] = TRUE;
00799 
00800   gc.flags[FLG_SIZEOFFORMALARRAY] = TRUE;
00801   gc.flags[FLG_FIXEDFORMALARRAY] = TRUE;
00802 
00803   gc.flags[FLG_PREDASSIGN] = TRUE;
00804   gc.flags[FLG_MODOBSERVER] = TRUE;
00805   gc.flags[FLG_MACROVARPREFIXEXCLUDE] = TRUE;
00806   gc.flags[FLG_EXTERNALNAMECASEINSENSITIVE] = TRUE;
00807 
00808   gc.flags[FLG_PARAMIMPTEMP] = TRUE;
00809   gc.flags[FLG_RETIMPONLY] = TRUE;
00810   gc.flags[FLG_GLOBIMPONLY] = TRUE;
00811   gc.flags[FLG_STRUCTIMPONLY] = TRUE;
00812   gc.flags[FLG_PREPROC] = TRUE;
00813   gc.flags[FLG_NAMECHECKS] = TRUE;
00814   gc.flags[FLG_FORMATCODE] = TRUE;
00815   gc.flags[FLG_FORMATTYPE] = TRUE;
00816   gc.flags[FLG_BADFLAG] = TRUE;
00817   gc.flags[FLG_WARNFLAGS] = TRUE;
00818   gc.flags[FLG_WARNUNIXLIB] = TRUE;
00819   gc.flags[FLG_WARNPOSIX] = TRUE;
00820   gc.flags[FLG_SHOWCOL] = TRUE;
00821   gc.flags[FLG_SHOWFUNC] = TRUE;
00822   gc.flags[FLG_SUPCOUNTS] = TRUE;
00823   gc.flags[FLG_HINTS] = TRUE;
00824   gc.flags[FLG_SYNTAX] = TRUE;
00825   gc.flags[FLG_TYPE] = TRUE;
00826   gc.flags[FLG_INCOMPLETETYPE] = TRUE;
00827   gc.flags[FLG_ABSTRACT] = TRUE;
00828   gc.flags[FLG_ITER] = TRUE;
00829   gc.flags[FLG_CONTROL] = TRUE;
00830   gc.flags[FLG_UNRECOG] = TRUE;
00831   gc.flags[FLG_SYSTEMUNRECOG] = TRUE;
00832   gc.flags[FLG_LINTCOMMENTS] = TRUE;
00833   gc.flags[FLG_ACCESSCZECH] = TRUE;
00834   gc.flags[FLG_ACCESSMODULE] = TRUE;
00835   gc.flags[FLG_ACCESSFILE] = TRUE;
00836   gc.flags[FLG_MACROVARPREFIX] = TRUE;
00837 
00838   /*
00839   ** Changed for version 2.4.
00840   */
00841 
00842   gc.flags[FLG_GNUEXTENSIONS] = TRUE;
00843 
00844   /*
00845   ** On by default for Win32, but not Unix (to support MS/VC++ error message format).
00846   */
00847 
00848 # ifdef WIN32
00849   gc.flags[FLG_PARENFILEFORMAT] = TRUE;
00850 # endif
00851 }
00852 
00853 /*
00854 ** C is way-lame, and you can initialize an array to a constant except where
00855 ** it is declared.  Hence, a macro is used to set the modeflags.
00856 */
00857 
00858 /*@notfunction@*/
00859 # define SETFLAGS() \
00860   { int i = 0; while (modeflags[i] != INVALID_FLAG) { \
00861       if (!flagcode_isModeFlag (modeflags[i])) \
00862         { llbug (message ("not a mode flag: %s", \
00863                           flagcode_unparse (modeflags[i]))); } \
00864       else { context_setFlag (modeflags[i], TRUE); }  i++; }}
00865 
00866 void
00867 context_setMode (cstring s)
00868 {
00869   intSet setflags = intSet_new ();
00870   
00871   allFlagCodes (code)
00872     {
00873       if (flagcode_isModeFlag (code))
00874         {
00875           if (gc.setGlobally[code])
00876             {
00877               (void) intSet_insert (setflags, (int) code);
00878             }
00879         }
00880     } end_allFlagCodes;
00881   
00882   if (!intSet_isEmpty (setflags))
00883     {
00884       cstring rflags = cstring_undefined;
00885       int num = 0;
00886 
00887       intSet_elements (setflags, el)
00888         {
00889           if (cstring_isUndefined (rflags))
00890             {
00891               rflags = cstring_copy (flagcode_unparse ((flagcode) (el)));
00892             }
00893           else
00894             {
00895               rflags = message ("%q, %s", rflags, 
00896                                 flagcode_unparse ((flagcode) el));
00897             }
00898 
00899           num++;
00900           if (num > 4 && intSet_size (setflags) > 6)
00901             {
00902               rflags = message ("%q, (%d others) ...", rflags, 
00903                                 intSet_size (setflags) - num);
00904               break;
00905             }
00906         } end_intSet_elements ;
00907       
00908       voptgenerror (FLG_WARNFLAGS,
00909                     message ("Setting mode %s after setting mode flags will "
00910                              "override set values of flags: %s",
00911                              s, rflags),
00912                     g_currentloc);
00913 
00914       cstring_free (rflags);
00915     }
00916 
00917   intSet_free (setflags);
00918 
00919   context_resetModeFlags ();
00920 
00921   if (cstring_equalLit (s, "standard"))
00922     {
00923       flagcode modeflags[] = 
00924         {
00925           FLG_ENUMINT, FLG_MACROMATCHNAME,
00926           FLG_MACROUNDEF, FLG_RELAXQUALS, 
00927           FLG_USEALLGLOBS, FLG_CHECKSTRICTGLOBALS,
00928           FLG_CHECKSTRICTGLOBALIAS,
00929           FLG_CHECKEDGLOBALIAS,
00930           FLG_CHECKMODGLOBALIAS,
00931           FLG_PREDBOOLOTHERS, FLG_PREDBOOLINT,
00932           FLG_PARAMUNUSED, FLG_VARUNUSED, FLG_FUNCUNUSED, 
00933           FLG_TYPEUNUSED,
00934           FLG_CONSTUNUSED, FLG_ENUMMEMUNUSED, FLG_FIELDUNUSED,
00935           FLG_PTRNUMCOMPARE, FLG_BOOLCOMPARE, FLG_MUTREP, 
00936           FLG_NOEFFECT, FLG_IMPTYPE,
00937           FLG_RETVALOTHER, FLG_RETVALBOOL, FLG_RETVALINT,
00938           FLG_SPECUNDEF, FLG_INCONDEFS, FLG_INCONDEFSLIB, 
00939           FLG_MATCHFIELDS,
00940           FLG_MACROPARAMS, FLG_MACROASSIGN, FLG_SEFPARAMS, 
00941           FLG_MACROSTMT, FLG_MACROPARENS, 
00942           FLG_MACROFCNDECL,
00943           FLG_MACROCONSTDECL,
00944           FLG_MACROREDEF, FLG_INFLOOPS, FLG_UNREACHABLE, 
00945           FLG_NORETURN, FLG_CASEBREAK, FLG_MISSCASE, FLG_USEDEF, 
00946           FLG_FIRSTCASE,
00947           FLG_NESTEDEXTERN, 
00948           FLG_NUMLITERAL,
00949           FLG_ZEROBOOL,
00950           /* memchecks flags */
00951           FLG_NULLDEREF, 
00952           FLG_NULLSTATE, FLG_NULLASSIGN,
00953           FLG_NULLPASS, FLG_NULLRET,        
00954 
00955           FLG_COMPDEF, FLG_COMPMEMPASS, FLG_UNIONDEF,
00956           FLG_RETSTACK,
00957 
00958           /* memtrans flags */
00959           FLG_EXPOSETRANS,
00960           FLG_OBSERVERTRANS,
00961           FLG_DEPENDENTTRANS,
00962           FLG_NEWREFTRANS,
00963           FLG_ONLYTRANS,
00964           FLG_OWNEDTRANS,
00965           FLG_FRESHTRANS,
00966           FLG_SHAREDTRANS,
00967           FLG_TEMPTRANS,
00968           FLG_KEPTTRANS,
00969           FLG_REFCOUNTTRANS,
00970           FLG_STATICTRANS,
00971           FLG_UNKNOWNTRANS,
00972           FLG_KEEPTRANS,
00973           FLG_IMMEDIATETRANS,
00974 
00975           FLG_EXPORTLOCAL,
00976 
00977           FLG_USERELEASED, FLG_ALIASUNIQUE, FLG_MAYALIASUNIQUE,
00978           FLG_MUSTFREE, FLG_MUSTDEFINE, FLG_GLOBSTATE, 
00979           FLG_COMPDESTROY, FLG_MUSTNOTALIAS,
00980           FLG_MEMIMPLICIT,
00981           FLG_BRANCHSTATE, 
00982 
00983           FLG_EVALORDER, FLG_SHADOW, FLG_READONLYSTRINGS,
00984           FLG_EXITARG,
00985           FLG_IMPCHECKEDSPECGLOBALS,
00986           FLG_MODGLOBS, FLG_WARNLINTCOMMENTS,
00987           FLG_IFEMPTY, FLG_REALCOMPARE,
00988           FLG_BOOLOPS, FLG_PTRNEGATE,
00989           FLG_SHIFTSIGNED,
00990           INVALID_FLAG } ;
00991 
00992       SETFLAGS ();
00993     }
00994   else if (cstring_equalLit (s, "weak"))
00995     {
00996       flagcode modeflags[] = 
00997         { 
00998           FLG_BOOLINT, FLG_CHARINT, FLG_FLOATDOUBLE,
00999           FLG_ENUMINT, FLG_RELAXQUALS, FLG_FORWARDDECL, 
01000           FLG_CHARINDEX, FLG_ABSTVOIDP, FLG_USEALLGLOBS, 
01001           FLG_CHARUNSIGNEDCHAR,
01002           FLG_PREDBOOLOTHERS, 
01003           FLG_VARUNUSED, FLG_FUNCUNUSED, 
01004           FLG_TYPEUNUSED,
01005           FLG_CHECKSTRICTGLOBALS, FLG_MACROMATCHNAME,
01006           FLG_RETVALOTHER,
01007           FLG_IFEMPTY, 
01008           FLG_RETSTACK, FLG_PTRNEGATE,
01009           FLG_LONGUNSIGNEDINTEGRAL,
01010           FLG_LONGUNSIGNEDUNSIGNEDINTEGRAL,
01011           FLG_NUMLITERAL,
01012           FLG_CHARINTLITERAL,
01013           FLG_ZEROBOOL,
01014           INVALID_FLAG 
01015           } ;
01016 
01017       SETFLAGS ();
01018     }
01019   else if (cstring_equalLit (s, "checks"))
01020     {
01021       flagcode modeflags[] = 
01022         { 
01023           FLG_EXPORTLOCAL, FLG_IMPTYPE,
01024           FLG_CHECKSTRICTGLOBALIAS,
01025           FLG_CHECKEDGLOBALIAS,
01026           FLG_CHECKMODGLOBALIAS,
01027           FLG_UNCHECKEDGLOBALIAS,
01028           FLG_EXITARG, FLG_PTRNUMCOMPARE, 
01029           FLG_BOOLCOMPARE, FLG_MACROUNDEF, 
01030           FLG_MUSTMOD, FLG_ALLGLOBALS,
01031           FLG_PREDBOOLOTHERS, FLG_PREDBOOLPTR, FLG_PREDBOOLINT,
01032           FLG_USEALLGLOBS, FLG_MUTREP, FLG_RETALIAS, 
01033           FLG_RETEXPOSE, FLG_ASSIGNEXPOSE, FLG_CASTEXPOSE,
01034           FLG_FUNCUNUSED, FLG_GLOBALSIMPMODIFIESNOTHING,
01035           FLG_TYPEUNUSED, FLG_FIELDUNUSED, FLG_PARAMUNUSED, FLG_VARUNUSED,
01036           FLG_CONSTUNUSED, FLG_ENUMMEMUNUSED,
01037           FLG_NOEFFECT, FLG_EXPORTHEADER, FLG_EXPORTHEADERVAR,
01038           FLG_RETVALOTHER, FLG_RETVALBOOL, FLG_RETVALINT,
01039           FLG_SPECUNDEF, FLG_IMPCHECKMODINTERNALS,
01040           FLG_DECLUNDEF, FLG_INCONDEFS, FLG_INCONDEFSLIB, 
01041           FLG_MATCHFIELDS, 
01042           FLG_MACROPARAMS,
01043           FLG_MACROASSIGN,
01044           FLG_DECLPARAMMATCH,
01045           FLG_FCNDEREF,
01046           FLG_FIRSTCASE,
01047           FLG_SEFPARAMS, FLG_SEFUNSPEC, FLG_MACROSTMT, FLG_MACROPARENS, 
01048           FLG_MACROCONSTDECL,
01049           FLG_MACROFCNDECL,
01050           FLG_MACROREDEF, 
01051           FLG_INFLOOPS, FLG_INFLOOPSUNCON,
01052           FLG_UNREACHABLE, 
01053           FLG_NORETURN, FLG_CASEBREAK, FLG_MISSCASE,
01054           FLG_EVALORDER, FLG_USEDEF, 
01055 
01056           FLG_NESTEDEXTERN, 
01057 
01058           /* memchecks flags */
01059 
01060           FLG_NULLSTATE, FLG_NULLDEREF, FLG_NULLASSIGN,
01061           FLG_NULLPASS, FLG_NULLRET,
01062 
01063           FLG_COMPDEF, FLG_COMPMEMPASS, FLG_UNIONDEF, FLG_RETSTACK,       
01064 
01065           /* memtrans flags */
01066           FLG_EXPOSETRANS,
01067           FLG_OBSERVERTRANS,
01068           FLG_DEPENDENTTRANS,
01069           FLG_NEWREFTRANS,
01070           FLG_ONLYTRANS,
01071           FLG_OWNEDTRANS,
01072           FLG_FRESHTRANS,
01073           FLG_SHAREDTRANS,
01074           FLG_TEMPTRANS,
01075           FLG_KEPTTRANS,
01076           FLG_REFCOUNTTRANS,
01077           FLG_STATICTRANS,
01078           FLG_UNKNOWNTRANS,
01079           FLG_STATICINITTRANS,
01080           FLG_UNKNOWNINITTRANS,
01081           FLG_KEEPTRANS,
01082           FLG_IMMEDIATETRANS,
01083           FLG_ONLYUNQGLOBALTRANS,
01084           FLG_USERELEASED, FLG_ALIASUNIQUE, FLG_MAYALIASUNIQUE,
01085           FLG_MUSTFREE, FLG_MUSTDEFINE, FLG_GLOBSTATE, 
01086           FLG_COMPDESTROY, FLG_MUSTNOTALIAS,
01087           FLG_MEMIMPLICIT,
01088           FLG_BRANCHSTATE, 
01089           FLG_NULLPOINTERARITH,
01090           FLG_SHADOW, FLG_DEPARRAYS,
01091           FLG_REDECL, FLG_READONLYSTRINGS, FLG_READONLYTRANS,
01092           FLG_LOOPLOOPBREAK, FLG_SWITCHLOOPBREAK, FLG_MODGLOBS,
01093           FLG_CHECKSTRICTGLOBALS, FLG_IMPCHECKEDSPECGLOBALS,
01094           FLG_MACROMATCHNAME, FLG_WARNLINTCOMMENTS,
01095           FLG_INCLUDENEST, FLG_ANSIRESERVED, FLG_CPPNAMES, 
01096           FLG_NOPARAMS, FLG_IFEMPTY, FLG_WHILEEMPTY, FLG_REALCOMPARE,
01097           FLG_BOOLOPS, FLG_SHIFTSIGNED,
01098           INVALID_FLAG } ;
01099 
01100       SETFLAGS ();
01101     }
01102   else if (cstring_equalLit (s, "strict"))
01103     {
01104       flagcode modeflags[] = 
01105         { 
01106           FLG_CHECKSTRICTGLOBALIAS,
01107           FLG_CHECKEDGLOBALIAS,
01108           FLG_CHECKMODGLOBALIAS,
01109           FLG_UNCHECKEDGLOBALIAS,
01110           FLG_MODFILESYSTEM,
01111           FLG_MACROMATCHNAME,
01112           FLG_MACROUNDEF, FLG_MUTREP, FLG_MUSTMOD,
01113           FLG_ALLGLOBALS, FLG_IMPTYPE,
01114           FLG_MODNOMODS, FLG_MODGLOBSUNSPEC, FLG_MODSTRICTGLOBSUNSPEC,
01115           FLG_GLOBUNSPEC, FLG_SIZEOFTYPE,
01116           FLG_EXPORTHEADER, FLG_EXPORTHEADERVAR,
01117           FLG_NOPARAMS, FLG_OLDSTYLE, FLG_EXITARG, 
01118           FLG_RETSTACK,
01119           FLG_FCNDEREF,
01120           FLG_ONLYUNQGLOBALTRANS,
01121           FLG_GLOBALSIMPMODIFIESNOTHING,
01122           FLG_PREDBOOLOTHERS, FLG_PREDBOOLPTR, FLG_PREDBOOLINT,
01123           FLG_INTERNALGLOBS, FLG_INTERNALGLOBSNOGLOBS,
01124           FLG_USEALLGLOBS, FLG_RETALIAS, 
01125           FLG_MODGLOBS, FLG_MODGLOBSUNSPEC, FLG_MODGLOBSUNCHECKED,
01126           FLG_RETEXPOSE, FLG_ASSIGNEXPOSE, FLG_CASTEXPOSE,
01127           FLG_NOEFFECTUNCON, FLG_EVALORDERUNCON,
01128           FLG_FUNCUNUSED,
01129           FLG_EXPORTITER, FLG_EXPORTCONST,
01130           FLG_TYPEUNUSED, FLG_FIELDUNUSED, FLG_PARAMUNUSED, FLG_TOPUNUSED,
01131           FLG_CONSTUNUSED, FLG_ENUMMEMUNUSED,
01132           FLG_VARUNUSED, 
01133           FLG_NULLPOINTERARITH, FLG_POINTERARITH, 
01134           FLG_PTRNUMCOMPARE, 
01135           FLG_BOOLCOMPARE, FLG_NOEFFECT, 
01136           FLG_RETVALINT, FLG_RETVALBOOL, FLG_RETVALOTHER, 
01137           FLG_ANSIRESERVED, FLG_ANSIRESERVEDLOCAL, FLG_CPPNAMES,
01138           FLG_RETVALBOOL, FLG_RETVALINT, FLG_SPECUNDEF, 
01139           FLG_DECLUNDEF, FLG_STRICTOPS, FLG_INCONDEFS, 
01140           FLG_INCONDEFSLIB, FLG_MATCHFIELDS, FLG_EXPORTMACRO, FLG_EXPORTVAR, 
01141           FLG_EXPORTFCN, FLG_EXPORTTYPE, FLG_EXPORTLOCAL, FLG_MACROPARAMS, 
01142           FLG_MACROASSIGN,
01143           FLG_SEFPARAMS, FLG_SEFUNSPEC, FLG_MACROSTMT, FLG_MACROPARENS, 
01144           FLG_MACROFCNDECL,
01145           FLG_MACROCONSTDECL,
01146           FLG_MACROREDEF, FLG_MACROEMPTY,
01147           FLG_INFLOOPS, FLG_INFLOOPSUNCON,
01148           FLG_UNREACHABLE, 
01149           FLG_NORETURN, FLG_CASEBREAK, FLG_MISSCASE, FLG_USEDEF,
01150           FLG_EVALORDER,
01151           FLG_MODUNCON, FLG_MODUNCONNOMODS, FLG_MODINTERNALSTRICT,
01152           FLG_MODOBSERVERUNCON,
01153 
01154           FLG_NESTEDEXTERN, 
01155           FLG_FIRSTCASE,
01156 
01157           /* memchecks flags */
01158           FLG_NULLSTATE, FLG_NULLDEREF, FLG_NULLASSIGN,
01159           FLG_NULLPASS, FLG_NULLRET,
01160 
01161           FLG_COMPDEF, FLG_COMPMEMPASS, FLG_UNIONDEF,
01162 
01163           /* memtrans flags */
01164           FLG_EXPOSETRANS,
01165           FLG_OBSERVERTRANS,
01166           FLG_DEPENDENTTRANS,
01167           FLG_NEWREFTRANS,
01168           FLG_ONLYTRANS,
01169           FLG_OWNEDTRANS,
01170           FLG_FRESHTRANS,
01171           FLG_SHAREDTRANS,
01172           FLG_TEMPTRANS,
01173           FLG_KEPTTRANS,
01174           FLG_REFCOUNTTRANS,
01175           FLG_STATICTRANS,
01176           FLG_UNKNOWNTRANS,
01177           FLG_KEEPTRANS,
01178           FLG_IMMEDIATETRANS,
01179           FLG_STATICINITTRANS,
01180           FLG_UNKNOWNINITTRANS,
01181 
01182           FLG_USERELEASED, FLG_ALIASUNIQUE, FLG_MAYALIASUNIQUE,
01183           FLG_MUSTFREE, FLG_MUSTDEFINE, FLG_GLOBSTATE, 
01184           FLG_COMPDESTROY, FLG_MUSTNOTALIAS,
01185           FLG_MEMIMPLICIT,
01186           FLG_BRANCHSTATE, 
01187 
01188           FLG_DECLPARAMNAME, FLG_DECLPARAMMATCH,
01189 
01190           FLG_SHADOW, FLG_DEPARRAYS, 
01191           FLG_STRICTDESTROY, FLG_STRICTUSERELEASED, FLG_STRICTBRANCHSTATE,
01192           FLG_REDECL, FLG_READONLYSTRINGS, FLG_READONLYTRANS,
01193           FLG_LOOPLOOPBREAK, FLG_LOOPSWITCHBREAK, FLG_SWITCHLOOPBREAK,
01194           FLG_SWITCHSWITCHBREAK, FLG_LOOPLOOPCONTINUE,
01195           FLG_CHECKSTRICTGLOBALS, FLG_IMPCHECKEDSPECGLOBALS,
01196           FLG_ALLGLOBALS, FLG_IMPCHECKEDSTRICTGLOBALS,
01197           FLG_IMPCHECKEDSTRICTSTATICS,
01198           FLG_IMPCHECKEDSTRICTSPECGLOBALS,
01199           FLG_IMPCHECKMODINTERNALS,
01200           FLG_WARNMISSINGGLOBALS, FLG_WARNMISSINGGLOBALSNOGLOBS,
01201           FLG_WARNLINTCOMMENTS, FLG_ANSIRESERVEDLOCAL,
01202           FLG_INCLUDENEST, FLG_STRINGLITERALLEN,
01203           FLG_NUMSTRUCTFIELDS, FLG_NUMENUMMEMBERS,
01204           FLG_CONTROLNESTDEPTH,
01205           FLG_FORBLOCK, FLG_WHILEBLOCK,
01206           FLG_FOREMPTY, FLG_WHILEEMPTY,
01207           FLG_IFEMPTY, FLG_IFBLOCK,
01208           FLG_ELSEIFCOMPLETE,
01209           FLG_REALCOMPARE, FLG_BOOLOPS,
01210           FLG_SYSTEMDIRERRORS, FLG_UNUSEDSPECIAL,
01211 
01212           FLG_SHIFTSIGNED, FLG_BITWISEOPS,
01213           INVALID_FLAG } ;
01214 
01215       SETFLAGS ();
01216     }
01217   else
01218     {
01219       llcontbug (message ("context_setMode: bad mode: %s", s));
01220      }
01221 }
01222 
01223 bool
01224 context_isSpecialFile (cstring fname)
01225 {
01226   char *ext = filenameExtension (cstring_toCharsSafe (fname));
01227   
01228   return (mstring_equal (ext, ".y") 
01229           || mstring_equal (ext, ".l")
01230           || cstring_equalLit (fname, "lex.yy.c"));
01231 }
01232 
01233 bool
01234 context_isSystemDir (cstring dir)
01235 {
01236   cstring sysDirs = context_exposeString (FLG_SYSTEMDIRS);
01237   char *thisdir = cstring_toCharsSafe (sysDirs);
01238   char *nextdir = strchr (thisdir, SEPCHAR);
01239 
01240   if (nextdir != NULL)
01241     {
01242       *nextdir = '\0';
01243       nextdir += 1;
01244     }
01245 
01246   while (thisdir != NULL)
01247     {
01248       DPRINTF (("Test: %s / %s", dir, thisdir));
01249 
01250       if (cstring_equalCanonicalPrefix (dir, thisdir))
01251         {
01252           if (nextdir != NULL)
01253             {
01254               *(nextdir - 1) = SEPCHAR;
01255             }
01256           
01257           return TRUE;
01258         }
01259 
01260       if (nextdir != NULL)
01261         {
01262           *(nextdir - 1) = SEPCHAR;
01263         }
01264 
01265       if (nextdir != NULL)
01266         {
01267           thisdir = nextdir;
01268           nextdir = strchr (thisdir, SEPCHAR);
01269           
01270           if (nextdir != NULL)
01271             {
01272               *nextdir = '\0';
01273               nextdir += 1;
01274             } 
01275         }
01276       else
01277         {
01278           break;
01279         }
01280     } 
01281 
01282   DPRINTF (("Returns FALSE"));
01283   return FALSE;
01284 }
01285 
01286 void
01287 context_addFileAccessType (typeId t)
01288 {
01289   cstring base;
01290 
01291   if (gc.kind == CX_FUNCTION || gc.kind == CX_MACROFCN 
01292       || gc.kind == CX_UNKNOWNMACRO)
01293     {
01294       gc.acct = typeIdSet_insert (gc.acct, t);
01295     }
01296   
01297   gc.facct = typeIdSet_insert (gc.facct, t);
01298   
01299   base = fileloc_getBase (g_currentloc);
01300   insertModuleAccess (base, t);
01301   DPRINTF (("Add file access: %s / %s", typeIdSet_unparse (gc.facct),
01302             typeIdSet_unparse (gc.acct)));
01303 }
01304 
01305 void
01306 context_removeFileAccessType (typeId t)
01307 {
01308   if (gc.kind == CX_FUNCTION || gc.kind == CX_MACROFCN 
01309       || gc.kind == CX_UNKNOWNMACRO)
01310     {
01311       gc.acct = typeIdSet_removeFresh (gc.acct, t);
01312     }
01313   
01314   gc.facct = typeIdSet_removeFresh (gc.facct, t);
01315   gc.nacct = typeIdSet_insert (gc.nacct, t);
01316 }
01317 
01318 void context_enterFunctionDecl (void)
01319 {
01320   llassert (gc.kind == CX_GLOBAL);
01321   gc.kind = CX_FCNDECL;
01322 }
01323 
01324 void context_exitFunctionDecl (void)
01325 {
01326   gc.kind = CX_GLOBAL;
01327 }
01328 
01329 bool context_inFunctionDecl (void)
01330 {
01331   return (gc.kind == CX_FCNDECL);
01332 }
01333 
01334 void
01335 context_enterMacro (/*@observer@*/ uentry e)
01336 {
01337   context_enterFunction (e);
01338   gc.kind = CX_MACROFCN;
01339 }
01340 
01341 void
01342 context_enterUnknownMacro (/*@dependent@*/ uentry e)
01343 {
01344   llassert (uentry_isFunction (e));
01345   context_enterFunction (e);
01346   gc.kind = CX_UNKNOWNMACRO;
01347 }
01348 
01349 void context_enterAndClause (exprNode e)
01350 {
01351   
01352   usymtab_trueBranch (guardSet_copy (exprNode_getGuards (e)));
01353   pushClause (ANDCLAUSE);
01354 }
01355 
01356 void context_enterOrClause (exprNode e)
01357 {
01358   usymtab_trueBranch (guardSet_invert (exprNode_getGuards (e)));
01359   pushClause (ORCLAUSE);
01360 }
01361 
01362 bool context_inDeepLoop (void)
01363 {
01364   bool inLoop = FALSE;
01365 
01366   clauseStack_elements (gc.clauses, el)
01367     {
01368       if (clause_isLoop (el))
01369         {
01370           if (inLoop)
01371             {
01372               return TRUE;
01373             }
01374 
01375           inLoop = TRUE;
01376         }
01377     } end_clauseStack_elements;
01378 
01379   return FALSE;
01380 }
01381 
01382 bool context_inDeepSwitch (void)
01383 {
01384   bool inLoop = FALSE;
01385 
01386   clauseStack_elements (gc.clauses, el)
01387     {
01388       if (clause_isSwitch (el))
01389         {
01390           if (inLoop)
01391             {
01392               return TRUE;
01393             }
01394 
01395           inLoop = TRUE;
01396         }
01397     } end_clauseStack_elements;
01398 
01399   return FALSE;
01400 }
01401 
01402 bool context_inDeepLoopSwitch (void)
01403 {
01404   bool inLoop = FALSE;
01405 
01406   clauseStack_elements (gc.clauses, el)
01407     {
01408       if (clause_isBreakable (el))
01409         {
01410           if (inLoop)
01411             {
01412               return TRUE;
01413             }
01414 
01415           inLoop = TRUE;
01416         }
01417     } end_clauseStack_elements;
01418 
01419   return FALSE;
01420 }
01421 
01422 clause context_breakClause (void)
01423 {
01424   clauseStack_elements (gc.clauses, el)
01425     {
01426       if (clause_isSwitch (el))
01427         {
01428           return el;
01429         }
01430       else if (clause_isLoop (el))
01431         {
01432           return el;
01433         }
01434       else
01435         {
01436           ;
01437         }
01438     } end_clauseStack_elements;
01439 
01440   return NOCLAUSE;
01441 }
01442 
01443 clause context_nextBreakClause (void)
01444 {
01445   bool hasOne = FALSE;
01446 
01447   clauseStack_elements (gc.clauses, el)
01448     {
01449       if (clause_isBreakable (el))
01450         {
01451           if (hasOne)
01452             {
01453               return el;
01454             }
01455           else
01456             {
01457               hasOne = TRUE;
01458             }
01459         }
01460     } end_clauseStack_elements;
01461 
01462   return NOCLAUSE;
01463 }
01464   
01465 bool context_inConditional (void)
01466 {
01467   clauseStack_elements (gc.clauses, el)
01468     {
01469       /*
01470       ** Should also include TRUECLAUSE and FALSECLAUSE, but need
01471       ** to distinguish if from ? for this
01472       */
01473 
01474       if (clause_isBreakable (el) && (el != DOWHILECLAUSE))
01475         {
01476           return TRUE;
01477         }
01478     } end_clauseStack_elements;
01479 
01480   return FALSE;
01481 }
01482 
01483 void context_exitAndClause (exprNode pred, exprNode tbranch)
01484 {
01485   context_setJustPopped ();
01486   
01487   llassert (gc.inclause == ANDCLAUSE);
01488   
01489   usymtab_popAndBranch (pred, tbranch);
01490   clauseStack_pop (gc.clauses);
01491   gc.inclause = topClause (gc.clauses);
01492 }
01493 
01494 void context_exitOrClause (exprNode pred, exprNode tbranch)
01495 {
01496   context_setJustPopped ();
01497   
01498   llassert (gc.inclause == ORCLAUSE);
01499   
01500   usymtab_popOrBranch (pred, tbranch);
01501   clauseStack_pop (gc.clauses);
01502   gc.inclause = topClause (gc.clauses);
01503 }
01504 
01505 static void context_enterCondClauseAux (clause cl)
01506      /*@modifies gc@*/
01507 {
01508   pushClause (cl);
01509 }
01510 
01511 static void context_enterTrueAux (exprNode e, clause cl)
01512    /*@modifies gc@*/
01513 {
01514   usymtab_trueBranch (guardSet_copy (exprNode_getGuards (e)));
01515   pushClause (cl);
01516 }
01517 
01518 void context_enterIterClause (void)
01519 {
01520   context_enterTrueAux (exprNode_undefined, ITERCLAUSE);
01521 }
01522 
01523 void context_enterDoWhileClause (void)
01524 {
01525   pushClause (DOWHILECLAUSE);
01526 }
01527 
01528 void context_enterWhileClause (exprNode e)
01529 {
01530   context_enterTrueAux (e, WHILECLAUSE);
01531 }
01532 
01533 void context_enterForClause (exprNode e)
01534 {
01535   context_enterTrueAux (e, FORCLAUSE);
01536 }
01537 
01538 void context_enterTrueClause (exprNode e)
01539 {
01540   context_enterTrueAux (e, TRUECLAUSE);
01541 }
01542 
01543 void context_enterSwitch (exprNode e)
01544 {
01545   
01546   usymtab_switchBranch (e);
01547   context_enterCondClauseAux (SWITCHCLAUSE);
01548 }
01549 
01550 void context_exitSwitch (exprNode e, bool allpaths)
01551 {
01552     usymtab_exitSwitch (e, allpaths);
01553   
01554   while (clause_isCase (clauseStack_top (gc.clauses)))
01555     {
01556       clauseStack_pop (gc.clauses);
01557     }
01558   
01559   context_exitClauseSimp ();
01560 }
01561 
01562 void context_enterCaseClause (exprNode e)
01563 {
01564   bool branch = FALSE;
01565  
01566   DPRINTF (("Enter case clause!"));
01567 
01568   branch = usymtab_newCase (exprNode_undefined, e);
01569   
01570   if (branch)
01571     {
01572       context_enterCondClauseAux (CASECLAUSE);
01573     }
01574 }
01575 
01576 static void context_enterFalseClauseAux (exprNode e, clause cl)
01577      /*@modifies gc@*/
01578 {
01579   usymtab_altBranch (guardSet_invert (exprNode_getGuards (e)));
01580   gc.inclause = cl;
01581   clauseStack_switchTop (gc.clauses, cl);
01582 }
01583 
01584 void context_enterFalseClause (exprNode e)
01585 {
01586   
01587   context_enterFalseClauseAux (e, FALSECLAUSE);
01588 }
01589 
01590 void
01591 context_enterConstantMacro (/*@exposed@*/ /*@dependent@*/ uentry e)
01592 {
01593   gc.kind = CX_MACROCONST;
01594   gc.cont.fcn = e;
01595   gc.showfunction = context_getFlag (FLG_SHOWFUNC);
01596 
01597   gc.acct = typeIdSet_subtract (typeIdSet_union (gc.facct, uentry_accessType (e)), 
01598                                 gc.nacct);
01599 
01600   
01601   usymtab_enterScope ();
01602   sRef_enterFunctionScope ();
01603 
01604   gc.globs = globSet_undefined;
01605   globSet_clear (gc.globs_used);
01606   gc.mods = sRefSet_undefined;
01607 }
01608 
01609 uentry context_getHeader (void)
01610 {
01611   if (!(context_inFunctionLike () || (gc.kind == CX_MACROCONST)))
01612     {
01613       llfatalbug (message ("context_getHeader: bad call: %q",
01614                            context_unparse ()));
01615     }
01616 
01617   return (gc.cont.fcn);
01618 }
01619 
01620 void
01621 context_setFunctionDefined (fileloc loc)
01622 {
01623   switch (gc.kind)
01624     {
01625     case CX_UNKNOWNMACRO:
01626     case CX_FUNCTION:
01627     case CX_MACROFCN:
01628       uentry_setFunctionDefined (gc.cont.fcn, loc);
01629       break;
01630     default:
01631       /* (not a bug because of parse errors) */
01632       break;
01633     }
01634 }
01635 
01636 void
01637 context_enterFunction (/*@exposed@*/ uentry e)
01638 {
01639   gc.kind = CX_FUNCTION;
01640   gc.cont.fcn = e;
01641 
01642   if (uentry_hasAccessType (e))
01643     {
01644       gc.acct = typeIdSet_subtract (typeIdSet_union (gc.facct, uentry_accessType (e)), 
01645                                     gc.nacct);
01646     }
01647   else
01648     {
01649       gc.acct = gc.facct;
01650     }
01651 
01652   DPRINTF (("Enter function: %s / %s", uentry_unparse (e), 
01653             typeIdSet_unparse (gc.acct)));
01654 
01655   gc.showfunction = context_getFlag (FLG_SHOWFUNC);
01656   
01657   gc.globs = uentry_getGlobs (e);
01658   globSet_clear (gc.globs_used);
01659   gc.mods = uentry_getMods (e);
01660 
01661   usymtab_enterFunctionScope (e);
01662   sRef_enterFunctionScope ();
01663 }
01664 
01665 static bool context_checkStrictGlobals (void)
01666 {
01667   return (context_getFlag (FLG_CHECKSTRICTGLOBALS));
01668 }
01669 
01670 static bool context_hasGlobs (void)
01671 {
01672   if (context_inFunctionLike ())
01673     {
01674       return (uentry_hasGlobs (gc.cont.fcn));
01675     }
01676   else
01677     {
01678       return (FALSE);
01679     }
01680 }
01681 
01682 static bool context_checkCheckedGlobals (void)
01683 {
01684   return (context_getFlag (FLG_GLOBALS)
01685           && (context_getFlag (FLG_GLOBUNSPEC)
01686               || context_hasGlobs ()));
01687 }
01688 
01689 static bool context_checkUnknownGlobals (void)
01690 {
01691   /* should be uentry_hasGlobs ? */
01692 
01693   return (context_getFlag (FLG_ALLGLOBALS)
01694           && (context_getFlag (FLG_GLOBUNSPEC)
01695               || context_hasGlobs ()));
01696 }      
01697 
01698 static bool context_checkUncheckedGlobals (void)
01699 {
01700   return (FALSE);
01701 }      
01702 
01703 bool 
01704 context_checkExport (uentry e)
01705 {
01706   if (!gc.anyExports) return FALSE;
01707 
01708   if (uentry_isFunction (e)
01709       || (uentry_isVariable (e) && ctype_isFunction (uentry_getType (e))))
01710     {
01711       return context_maybeSet (FLG_EXPORTFCN);
01712     }
01713   else if (uentry_isExpandedMacro (e))
01714     {
01715       return context_maybeSet (FLG_EXPORTMACRO);
01716     }
01717   else if (uentry_isVariable (e))
01718     {
01719       return context_maybeSet (FLG_EXPORTVAR);
01720     }
01721   else if (uentry_isEitherConstant (e))
01722     {
01723       return context_maybeSet (FLG_EXPORTCONST);
01724     }
01725   else if (uentry_isIter (e) || uentry_isEndIter (e))
01726     {
01727       return context_maybeSet (FLG_EXPORTITER);
01728     }
01729   else if (uentry_isDatatype (e))
01730     {
01731       return context_maybeSet (FLG_EXPORTTYPE);
01732     }
01733   else
01734     {
01735       BADEXIT;
01736     }
01737 }
01738               
01739 bool
01740 context_checkGlobUse (uentry glob)
01741 {
01742   
01743   if (uentry_isCheckedStrict (glob))
01744     {
01745       return context_checkStrictGlobals ();
01746     }
01747   else if (uentry_isChecked (glob))
01748     {
01749       return context_checkCheckedGlobals ();
01750     }
01751   else if (uentry_isCheckedUnknown (glob) || uentry_isCheckMod (glob))
01752     {
01753       return context_checkUnknownGlobals ();
01754     }
01755   else 
01756     {
01757       llassert (uentry_isUnchecked (glob));
01758 
01759       return context_checkUncheckedGlobals ();
01760     }
01761 }
01762 
01763 bool
01764 context_checkAliasGlob (uentry glob)
01765 {
01766   if (uentry_isCheckedStrict (glob))
01767     {
01768       return gc.flags[FLG_CHECKSTRICTGLOBALIAS];
01769     }
01770   else if (uentry_isChecked (glob))
01771     {
01772       return gc.flags[FLG_CHECKEDGLOBALIAS];
01773     }
01774   else if (uentry_isCheckMod (glob))
01775     {
01776       return gc.flags[FLG_CHECKMODGLOBALIAS];
01777     }
01778   else 
01779     {
01780       llassert (uentry_isUnchecked (glob) || uentry_isCheckedUnknown (glob));
01781 
01782       return gc.flags[FLG_UNCHECKEDGLOBALIAS];
01783     }
01784 }
01785 
01786 bool context_checkInternalUse (void)
01787 {
01788   if (context_hasGlobs ())
01789     {
01790       return (gc.flags[FLG_INTERNALGLOBS]);
01791     }
01792   else
01793     {
01794       return (gc.flags[FLG_INTERNALGLOBSNOGLOBS]);
01795     }
01796 }
01797 
01798 bool
01799 context_checkGlobMod (sRef el)
01800 {
01801   uentry ue = sRef_getUentry (el);
01802 
01803   /* no: llassert (sRef_isGlobal (el)); also check local statics */
01804 
01805   if (uentry_isCheckedModify (ue)
01806       || (!uentry_isUnchecked (ue) && (gc.flags[FLG_ALLGLOBALS])))
01807     {
01808       if (context_hasMods ())
01809         {
01810           return (gc.flags[FLG_MODGLOBS]);
01811         }
01812       else
01813         {
01814           if (uentry_isCheckedStrict (ue))
01815             {
01816               return (gc.flags[FLG_MODGLOBSUNSPEC]);
01817             }
01818           else
01819             {
01820               return (gc.flags[FLG_MODSTRICTGLOBSUNSPEC]);
01821             }
01822         }
01823     }
01824   else
01825     {
01826       if (context_hasMods ())
01827         {
01828           return (gc.flags[FLG_MODGLOBSUNCHECKED]);
01829         }
01830       else
01831         {
01832           return FALSE;
01833         }
01834     }
01835 }
01836 
01837 void
01838 context_usedGlobal (sRef el)
01839 {
01840   if (!globSet_member (gc.globs_used, el))
01841     {
01842       /* 
01843       ** The first time a global is used in a function, we need
01844       ** to clear the derived sRefs, since they were set for the
01845       ** previous function.
01846       */
01847 
01848       sRef_clearDerived (el);
01849       gc.globs_used = globSet_insert (gc.globs_used, el);
01850     }
01851 }
01852 
01853 /*@observer@*/ sRefSet
01854 context_modList (void)
01855 {
01856   return gc.mods;
01857 }
01858 
01859 bool
01860 context_globAccess (sRef s)
01861 {
01862   llassert (sRef_isGlobal (s) || sRef_isKindSpecial (s));
01863   return (globSet_member (gc.globs, s));
01864 }
01865 
01866 bool
01867 context_hasAccess (typeId t)
01868 {
01869   if (context_inFunctionLike ())
01870     {
01871       return (typeIdSet_member (gc.acct, t));
01872     }
01873   else
01874     {
01875       return (context_hasFileAccess (t));
01876     }
01877 }
01878 
01879 bool
01880 context_hasFileAccess (typeId t)
01881 {
01882   return (typeIdSet_member (gc.facct, t));
01883 }
01884 
01885 /*@only@*/ cstring
01886 context_unparseAccess (void)
01887 {
01888   return (message ("%q / %q", typeIdSet_unparse (gc.acct),
01889                    typeIdSet_unparse (gc.facct)));
01890 }
01891 
01892 /*@only@*/ cstring
01893 context_unparseClauses (void)
01894 {
01895   return (clauseStack_unparse (gc.clauses));
01896 }
01897 
01898 bool
01899 context_couldHaveAccess (typeId t)
01900 {
01901   if (gc.kind == CX_FUNCTION || gc.kind == CX_MACROFCN || gc.kind == CX_UNKNOWNMACRO)
01902     {
01903       return (typeIdSet_member (gc.acct, t));
01904     }
01905   else
01906     {
01907       return (typeIdSet_member (gc.facct, t)); 
01908     }
01909 }
01910 
01911 ctype
01912 context_getRetType (void)
01913 {
01914   ctype f = ctype_undefined;
01915 
01916   if (gc.kind == CX_FUNCTION || gc.kind == CX_MACROFCN)
01917     {
01918       f = uentry_getType (gc.cont.fcn);
01919     }
01920   else if (gc.kind == CX_UNKNOWNMACRO)
01921     {
01922       return ctype_unknown;
01923     }
01924   else
01925     {
01926       llcontbuglit ("context_getRetType: not in a function context");
01927       return ctype_unknown;
01928     }
01929 
01930   if (!ctype_isFunction (f))
01931     {
01932       if (ctype_isKnown (f))
01933         {
01934           llbuglit ("context_getRetType: not a function");
01935         }
01936 
01937       return ctype_unknown;
01938     }
01939   return (ctype_returnValue (f));
01940 }    
01941 
01942 bool
01943 context_hasMods (void)
01944 {
01945   if (context_inFunctionLike ())
01946     {
01947       return (uentry_hasMods (gc.cont.fcn));
01948     }
01949   else
01950     {
01951       return FALSE;
01952     }
01953 }
01954 
01955 void
01956 context_exitAllClauses (void)
01957 {
01958   
01959   while (!clauseStack_isEmpty (gc.clauses))
01960     {
01961       clause el = clauseStack_top (gc.clauses);
01962 
01963       gc.inclause = el;
01964 
01965       if (clause_isNone (el))
01966         {
01967           usymtab_quietExitScope (g_currentloc);
01968           clauseStack_pop (gc.clauses);
01969         }
01970       else
01971         {
01972           context_exitClausePlain ();
01973         }
01974     }
01975 
01976   clauseStack_clear (gc.clauses);
01977 
01978   
01979   gc.inclause = NOCLAUSE;
01980 }
01981 
01982 static
01983 void context_exitClauseSimp (void)
01984 {
01985   
01986   context_setJustPopped ();
01987   clauseStack_pop (gc.clauses);
01988   gc.inclause = topClause (gc.clauses);
01989 }
01990 
01991 static
01992 void context_exitCaseClause (void)
01993 {
01994   context_setJustPopped ();
01995   usymtab_popCaseBranch ();
01996   clauseStack_pop (gc.clauses);
01997   gc.inclause = topClause (gc.clauses);
01998 }
01999 
02000 static
02001 void context_exitClauseAux (exprNode pred, exprNode tbranch)
02002 {
02003   context_setJustPopped ();
02004   usymtab_popTrueBranch (pred, tbranch, gc.inclause);
02005   clauseStack_pop (gc.clauses);
02006   gc.inclause = topClause (gc.clauses);
02007 }
02008 
02009 void context_exitTrueClause (exprNode pred, exprNode tbranch)
02010 {
02011   if (gc.inclause != TRUECLAUSE)
02012     {
02013       llparseerror (cstring_makeLiteral
02014                     ("Likely parse error.  Conditional clauses are inconsistent."));
02015       return;
02016     }
02017 
02018     
02019   context_setJustPopped ();
02020 
02021   usymtab_popTrueBranch (pred, tbranch, TRUECLAUSE);
02022   clauseStack_pop (gc.clauses);
02023   gc.inclause = topClause (gc.clauses);
02024   
02025   }
02026 
02027 void context_exitIterClause (exprNode body)
02028 {
02029   llassert (gc.inclause == ITERCLAUSE);
02030 
02031   context_setJustPopped ();
02032 
02033   if (context_getFlag (FLG_LOOPEXEC))
02034     {
02035       usymtab_popTrueExecBranch (exprNode_undefined, body, ITERCLAUSE);
02036     }
02037   else
02038     {
02039       usymtab_popTrueBranch (exprNode_undefined, body, ITERCLAUSE);
02040     }
02041 
02042   clauseStack_pop (gc.clauses);
02043   gc.inclause = topClause (gc.clauses);
02044 }
02045 
02046 static void context_popCase (void) {
02047   /*
02048   ** If we are exiting an outer clause, sometimes still in a switch case.
02049   **
02050   ** e.g.: 
02051   **
02052   ** switch(a)
02053   ** {
02054   **   case 1:
02055   **     while (c>3)
02056   **       {
02057   **         case 3: ++c;
02058   **       }
02059   ** }     
02060   */
02061 
02062   DPRINTF (("Popping case clause: %s",
02063             clauseStack_unparse (gc.clauses)));
02064 
02065   if (gc.inclause == CASECLAUSE) {
02066     context_exitCaseClause ();
02067   }
02068 }
02069 
02070 void context_exitWhileClause (exprNode pred, exprNode body)
02071 {
02072   guardSet invGuards = guardSet_invert (exprNode_getGuards (pred));
02073 
02074   context_popCase (); 
02075 
02076   if (gc.inclause != WHILECLAUSE) {
02077     DPRINTF (("Clause: %s / %s", clause_unparse (gc.inclause),
02078               clauseStack_unparse (gc.clauses)));
02079   }
02080 
02081   llassert (gc.inclause == WHILECLAUSE);
02082 
02083   context_setJustPopped ();
02084 
02085   
02086   /*
02087   ** predicate must be false after while loop (unless there are breaks)
02088   */
02089 
02090   if (context_getFlag (FLG_LOOPEXEC))
02091     {
02092       usymtab_popTrueExecBranch (pred, body, WHILECLAUSE);
02093     }
02094   else
02095     {
02096       usymtab_popTrueBranch (pred, body, WHILECLAUSE);
02097     }
02098 
02099   
02100   usymtab_addGuards (invGuards);
02101   guardSet_free (invGuards);
02102 
02103   clauseStack_pop (gc.clauses);
02104   gc.inclause = topClause (gc.clauses);  
02105 }
02106 
02107 void context_exitDoWhileClause (exprNode pred)
02108 {
02109   guardSet invGuards = guardSet_invert (exprNode_getGuards (pred));
02110 
02111   if (gc.inclause == CASECLAUSE) {
02112     /* handle Duff's device */
02113     clauseStack_pop (gc.clauses);
02114     gc.inclause = topClause (gc.clauses);
02115   }
02116 
02117   llassert (gc.inclause == DOWHILECLAUSE);
02118 
02119   context_setJustPopped ();
02120 
02121     
02122   usymtab_addGuards (invGuards);
02123   guardSet_free (invGuards);
02124 
02125   clauseStack_pop (gc.clauses);
02126   gc.inclause = topClause (gc.clauses);  
02127 }
02128 
02129 void context_exitForClause (exprNode forPred, exprNode body)
02130 {
02131   guardSet invGuards = guardSet_invert (exprNode_getForGuards (forPred));
02132 
02133   llassert (gc.inclause == FORCLAUSE);
02134   context_setJustPopped ();
02135 
02136   /*
02137   ** predicate must be false after while loop (unless there are breaks)
02138   */
02139 
02140   if (context_getFlag (FLG_LOOPEXEC))
02141     {
02142             usymtab_popTrueExecBranch (forPred, body, FORCLAUSE);
02143     }
02144   else
02145     {
02146       usymtab_popTrueBranch (forPred, body, FORCLAUSE);
02147     }
02148 
02149   usymtab_addGuards (invGuards);
02150   guardSet_free (invGuards);
02151   clauseStack_pop (gc.clauses);
02152   gc.inclause = topClause (gc.clauses);
02153 }
02154 
02155 static void context_exitClausePlain (void)
02156 {
02157   llassert (gc.inclause != NOCLAUSE);
02158   
02159   if (gc.inclause == FALSECLAUSE)
02160     {
02161       context_exitClause (exprNode_undefined, exprNode_undefined, exprNode_undefined);
02162     }
02163   else
02164     {
02165       context_exitClauseAux (exprNode_undefined, exprNode_undefined);
02166     }
02167   
02168 }
02169 
02170 void context_exitClause (exprNode pred, exprNode tbranch, exprNode fbranch)
02171 {
02172     
02173   context_setJustPopped ();
02174 
02175   if (gc.inclause == FALSECLAUSE)
02176     {
02177       usymtab_popBranches (pred, tbranch, fbranch, FALSE, FALSECLAUSE);
02178 
02179       llassert (clauseStack_top (gc.clauses) == FALSECLAUSE);
02180 
02181       clauseStack_pop (gc.clauses);
02182       gc.inclause = topClause (gc.clauses);
02183     }
02184   else
02185     {
02186             context_exitTrueClause (pred, tbranch);
02187     }
02188 }
02189 
02190 void
02191 context_returnFunction (void)
02192 {
02193     usymtab_checkFinalScope (TRUE);
02194   }
02195 
02196 void
02197 context_exitFunction (void)
02198 {    
02199   if (!context_inFunction () && !context_inMacroConstant () 
02200       && !context_inMacroUnknown () 
02201       && !context_inIterDef () && !context_inIterEnd ())
02202     {
02203       /*
02204       ** not a bug because of parse errors
02205       */
02206     }
02207   else
02208     {
02209       if (context_inMacro () && usymtab_inFunctionScope ())
02210         {
02211           usymtab_exitScope (exprNode_undefined);
02212         }
02213       
02214       if (uentry_hasGlobs (gc.cont.fcn))
02215         {
02216           exprChecks_checkUsedGlobs (gc.globs, gc.globs_used);
02217         }
02218       
02219             
02220       if (uentry_hasMods (gc.cont.fcn))
02221         {
02222           if (context_getFlag (FLG_MUSTMOD))
02223             {
02224               exprNode_checkAllMods (gc.mods, gc.cont.fcn);
02225             }
02226         }
02227 
02228       /*
02229       ** clear file static modifies
02230       */
02231       
02232       /* do this first to get unused error messages */
02233 
02234       usymtab_exitScope (exprNode_undefined);
02235       sRef_exitFunctionScope ();
02236       
02237       gc.showfunction = FALSE;
02238       gc.kind = CX_GLOBAL;
02239       gc.cont.glob = TRUE;
02240       gc.acct = gc.facct; 
02241       gc.globs = globSet_new ();
02242       globSet_clear (gc.globs_used);
02243       gc.mods = sRefSet_new ();
02244     }
02245 
02246   llassert (clauseStack_isEmpty (gc.clauses));
02247   llassert (gc.inclause == NOCLAUSE);
02248 }
02249 
02250 void
02251 context_quietExitFunction (void)
02252 {
02253   while (gc.kind == CX_INNER)
02254     { 
02255       context_exitInnerPlain ();
02256     }
02257 
02258   if (!context_inFunction () && !context_inMacroConstant () && !context_inMacroUnknown () 
02259       && !context_inIterDef () && !context_inIterEnd ())
02260     {
02261     }
02262   else
02263     {
02264       usymtab_quietExitScope (g_currentloc);
02265 
02266       gc.showfunction = FALSE;
02267       gc.kind = CX_GLOBAL;
02268       gc.cont.glob = TRUE;
02269       gc.acct = gc.facct; 
02270       gc.globs = globSet_new ();
02271       globSet_clear (gc.globs_used);
02272       gc.mods = sRefSet_new ();
02273 
02274       sRef_exitFunctionScope ();
02275     }
02276 }
02277 
02278 /*@observer@*/ uentryList
02279 context_getParams (void)
02280 {
02281   if (context_inFunctionLike ())
02282     {
02283             return (uentry_getParams (gc.cont.fcn));
02284     }
02285   else
02286     {
02287       llcontbug (message ("context_getParams: not in function: %q", context_unparse ()));
02288       return uentryList_undefined;
02289     }
02290 }
02291 
02292 /*@observer@*/ globSet
02293 context_getUsedGlobs (void)
02294 {
02295   llassert (gc.kind == CX_FUNCTION || gc.kind == CX_MACROFCN 
02296             || gc.kind == CX_UNKNOWNMACRO || gc.kind == CX_ITERDEF);
02297 
02298   return (gc.globs_used);
02299 }
02300 
02301 cstring
02302 context_moduleName ()
02303 {
02304   return (fileloc_getBase (g_currentloc));
02305 }
02306 
02307 /*@observer@*/ globSet
02308 context_getGlobs (void)
02309 {
02310   llassert (gc.kind == CX_FUNCTION || gc.kind == CX_MACROFCN 
02311             || gc.kind == CX_UNKNOWNMACRO || gc.kind == CX_ITERDEF);
02312 
02313   return (gc.globs);
02314 }
02315 
02316 void
02317 context_addBoolAccess (void)
02318 {
02319   cstring bname = context_getString (FLG_BOOLTYPE);
02320   typeIdSet boolt = typeIdSet_single (usymtab_getTypeId (bname));
02321   
02322   addModuleAccess (cstring_copy (bname), boolt);
02323 
02324   /* for sys/types (perhaps, this is bogus!) */ 
02325   addModuleAccess (cstring_makeLiteral ("types"), boolt); 
02326 }
02327 
02328 # if 0
02329 bool
02330 context_canAccessBool (void)
02331 {
02332   return TRUE;
02333 }
02334 # endif
02335 
02336 /*
02337   static typeId boolType = typeId_invalid;
02338 
02339   if (typeId_isInvalid (boolType))
02340     { 
02341       boolType = usymtab_getTypeId (context_getBoolName ());
02342     }
02343 
02344   if (typeId_isInvalid (boolType)) {
02345     return FALSE;
02346   } else {
02347     return (typeIdSet_member (gc.acct, boolType));
02348   }
02349 }
02350 */
02351 
02352 /* evs 2000-07-25: old version - replaced */
02353 
02354 ctype
02355 context_boolImplementationType () {
02356   /* For now, this is bogus! */
02357   return ctype_int;
02358 }
02359 
02360 bool
02361 context_canAccessBool (void)
02362 {
02363   static typeId boolType = typeId_invalid;
02364 
02365   if (typeId_isInvalid (boolType))
02366     { 
02367       boolType = usymtab_getTypeId (context_getBoolName ());
02368     }
02369 
02370   if (!typeId_isInvalid (boolType))
02371     { 
02372       return context_hasAccess (boolType);
02373     }
02374   else 
02375     {
02376       ;
02377     }
02378 
02379   return FALSE; 
02380 }
02381 
02382 void
02383 context_setMessageAnnote (/*@only@*/ cstring s)
02384 {
02385   llassert (cstring_isUndefined (gc.msgAnnote));
02386     gc.msgAnnote = s;
02387 }
02388 
02389 bool
02390 context_hasMessageAnnote (void)
02391 {
02392   return (cstring_isDefined (gc.msgAnnote));
02393 }
02394 
02395 void
02396 context_clearMessageAnnote (void)
02397 {
02398   if (cstring_isDefined (gc.msgAnnote))
02399     {
02400       cstring_free (gc.msgAnnote);
02401       gc.msgAnnote = cstring_undefined;
02402     }
02403 }
02404 
02405 /*@only@*/ cstring
02406 context_getMessageAnnote (void)
02407 {
02408   cstring st = gc.msgAnnote;
02409 
02410     gc.msgAnnote = cstring_undefined;
02411   return st;
02412 }
02413 
02414 void
02415 context_setAliasAnnote (/*@observer@*/ sRef s, /*@observer@*/ sRef t)
02416 {
02417     llassert (sRef_isInvalid (gc.aliasAnnote));
02418   llassert (!sRef_sameName (s, t));
02419   gc.aliasAnnote = s;
02420   gc.aliasAnnoteAls = t;
02421 }
02422 
02423 bool
02424 context_hasAliasAnnote (void)
02425 {
02426   return (sRef_isValid (gc.aliasAnnote));
02427 }
02428 
02429 void
02430 context_clearAliasAnnote (void)
02431 {
02432   gc.aliasAnnote = sRef_undefined;
02433 }
02434 
02435 cstring
02436 context_getAliasAnnote (void)
02437 {
02438   sRef ret = gc.aliasAnnote;
02439   sRef als = gc.aliasAnnoteAls;
02440 
02441   llassert (sRef_isValid (ret) && sRef_isValid (als));
02442 
02443   gc.aliasAnnote = sRef_undefined;
02444   return (message ("%q aliases %q", sRef_unparse (als), sRef_unparse (ret)));
02445 }
02446 
02447 void
02448 context_recordFileModifies (sRefSet mods)
02449 {
02450     gc.modrecs = sRefSetList_add (gc.modrecs, mods);
02451 }
02452 
02453 void
02454 context_recordFileGlobals (globSet mods)
02455 {
02456     /*@access globSet@*/ context_recordFileModifies (mods); /*@noaccess globSet@*/
02457 }
02458 
02459 void
02460 context_setCommentMarkerChar (char c)
02461 {
02462   llassert (c != '\0');
02463 
02464   context_setValue (FLG_COMMENTCHAR, (int) c);
02465 }
02466 
02467 char
02468 context_getCommentMarkerChar (void)
02469 {
02470   return ((char) context_getValue (FLG_COMMENTCHAR));
02471 }
02472 
02473 static void
02474 context_setValue (flagcode flag, int val)
02475 {
02476   int index = flagcode_valueIndex (flag);
02477 
02478   llassert (index >= 0 && index <= NUMVALUEFLAGS);
02479 
02480   if (val <= 0)
02481     {
02482       switch (flag)
02483         {
02484         case FLG_INCLUDENEST:
02485         case FLG_CONTROLNESTDEPTH:
02486         case FLG_STRINGLITERALLEN:
02487         case FLG_NUMSTRUCTFIELDS:
02488         case FLG_NUMENUMMEMBERS:
02489         case FLG_LINELEN:
02490           {
02491             cstring warn = message ("Value for %s must be a positive "
02492                                     "number (given %d)",
02493                                     flagcode_unparse (flag), val);
02494             
02495             flagWarning (warn);
02496             cstring_free (warn);
02497             val = MINLINELEN;
02498           }
02499           return;
02500         default:
02501           break;
02502         }
02503     }
02504 
02505   if (flag == FLG_LINELEN && val < MINLINELEN)
02506     {
02507       cstring warn = message ("Value for %s must be at least %d (given %d)",
02508                               flagcode_unparse (flag), 
02509                               MINLINELEN, val);
02510       flagWarning (warn);
02511       cstring_free (warn);
02512       val = MINLINELEN;
02513     }
02514 
02515     gc.values[index] = val;
02516 }
02517 
02518 void
02519 context_setValueAndFlag (flagcode flag, int val)
02520 {
02521   gc.flags[flag] = TRUE;
02522   context_setValue (flag, val);
02523 }
02524 
02525 int
02526 context_getValue (flagcode flag)
02527 {
02528   int index = flagcode_valueIndex (flag);
02529 
02530   llassert (index >= 0 && index <= NUMVALUEFLAGS);
02531   return (gc.values[index]);
02532 }
02533 
02534 int
02535 context_getCounter (flagcode flag)
02536 {
02537   int index = flagcode_valueIndex (flag);
02538 
02539   llassert (index >= 0 && index <= NUMVALUEFLAGS);
02540   return (gc.counters[index]);
02541 }
02542 
02543 void
02544 context_incCounter (flagcode flag)
02545 {
02546   int index = flagcode_valueIndex (flag);
02547 
02548   llassert (index >= 0 && index <= NUMVALUEFLAGS);
02549   /* check limit */
02550   gc.counters[index]++;
02551 }
02552 
02553 void
02554 context_decCounter (flagcode flag)
02555 {
02556   int index = flagcode_valueIndex (flag);
02557 
02558   llassert (index >= 0 && index <= NUMVALUEFLAGS);
02559   gc.counters[index]--;
02560 }
02561 
02562 bool context_showFunction (void)
02563 {
02564   return (gc.showfunction);
02565 }
02566 
02567 void
02568 context_setString (flagcode flag, cstring val)
02569 {
02570   int index = flagcode_stringIndex (flag);
02571 
02572   llassert (index >= 0 && index <= NUMSTRINGFLAGS);
02573 
02574   if (flag == FLG_SYSTEMDIRS)
02575     {
02576       llassert (cstring_isDefined (val));
02577 
02578       if (cstring_firstChar (val) == '\"')
02579         {
02580           cstring oval = val;
02581           cstring tval = cstring_copy (cstring_suffix (val, 1));
02582         
02583           if (cstring_lastChar (tval) != '\"')
02584             {
02585               int n = cstring_length (tval) - 1;
02586 
02587               while (isspace ((int) cstring_getChar (tval, n)))
02588                 {
02589                   n--;
02590                 }
02591 
02592               if (cstring_getChar (tval, n) != '\"')
02593                 {
02594                   cstring msg = message ("Setting -systemdirs to string with unmatching quotes: %s", val);
02595                   flagWarning (msg);
02596                   cstring_free (msg);
02597                 }
02598               else
02599                 {
02600                   cstring otval = tval;
02601                   tval = cstring_prefix (tval, n);
02602                   cstring_free (otval);
02603                 }
02604             }
02605           
02606           val = cstring_copy (cstring_clip (tval, cstring_length (tval) - 1));
02607           DPRINTF (("val = %s", val));
02608           cstring_free (tval);
02609           cstring_free (oval);
02610         }
02611     }
02612 
02613   if (flag == FLG_TMPDIR)
02614     {
02615       llassert (cstring_isDefined (val));
02616       
02617       if (cstring_length (val) == 0)
02618         {
02619           cstring_free (val);
02620           val = message (".%s", cstring_makeLiteralTemp (CONNECTSTR));
02621         }
02622       else if (cstring_lastChar (val) != CONNECTCHAR)
02623         {
02624           val = cstring_appendChar (val, CONNECTCHAR);
02625         }
02626       else
02627         {
02628           ;
02629         }
02630     }
02631 
02632   if (cstring_length (val) >= 1
02633       && cstring_firstChar (val) == '"')
02634     {
02635       cstring s = message
02636                    ("setting %s to string beginning with \".  You probably "
02637                     "don't meant to have the \"'s.",
02638                     flagcode_unparse (flag));
02639 
02640       flagWarning (s);
02641       cstring_free (s);
02642     }
02643 
02644   if (flag == FLG_BOOLTYPE)
02645     {
02646 
02647     }
02648 
02649   gc.strings[index] = val;
02650 }
02651 
02652 static /*@exposed@*/ cstring
02653 context_exposeString (flagcode flag)
02654 {
02655   int index = flagcode_stringIndex (flag);
02656 
02657   llassert (index >= 0 && index <= NUMSTRINGFLAGS);
02658   return (gc.strings[index]);
02659 }
02660 
02661 cstring
02662 context_getString (flagcode flag)
02663 {
02664   return (context_exposeString (flag));
02665 }
02666 
02667 void
02668 context_resetErrors (void)
02669 {
02670   gc.numerrors = 0;
02671 }
02672 
02673 void context_initMod (void)
02674    /*@globals undef gc; @*/
02675 {
02676   gc.kind = CX_GLOBAL;
02677   gc.instandardlib = FALSE;
02678   gc.numerrors = 0;
02679   gc.neednl = FALSE;
02680   gc.linesprocessed = 0;
02681   gc.speclinesprocessed = 0;
02682   gc.insuppressregion = FALSE;
02683   gc.macroMissingParams = FALSE;
02684   gc.preprocessing = FALSE;
02685   gc.incommandline = FALSE;
02686   gc.mc = macrocache_create ();
02687   gc.nmods = 0;
02688   gc.maxmods = DEFAULTMAXMODS;
02689   gc.moduleaccess = (maccesst *) 
02690     dmalloc (sizeof (*gc.moduleaccess) * (gc.maxmods));
02691 
02692   gc.library = FLG_ANSILIB;
02693 
02694   gc.locstack = filelocStack_new ();
02695   gc.modrecs = sRefSetList_undefined;
02696   gc.anyExports = FALSE;
02697 
02698   gc.ftab = fileTable_create ();
02699   gc.msgLog = messageLog_new ();
02700   gc.inimport = FALSE;
02701   gc.inDerivedFile = FALSE;
02702   gc.inheader = FALSE;
02703   gc.markers = flagMarkerList_new ();
02704   gc.cont.glob = TRUE;
02705   gc.showfunction = FALSE;
02706   gc.msgAnnote = cstring_undefined;
02707   gc.aliasAnnote = sRef_undefined;
02708   gc.aliasAnnoteAls = sRef_undefined;
02709   gc.boolType = ctype_bool;
02710   gc.mods = sRefSet_new ();
02711 
02712   gc.saveloc = fileloc_undefined;
02713 
02714   gc.inmacrocache = FALSE;
02715   gc.inclause = NOCLAUSE;
02716   gc.clauses = clauseStack_new ();
02717   gc.globs = globSet_new ();
02718   gc.nacct = typeIdSet_emptySet ();
02719   gc.acct = typeIdSet_emptySet ();
02720   gc.facct = typeIdSet_emptySet ();
02721   gc.savedFlags = FALSE;
02722   gc.pushloc = fileloc_undefined;
02723   gc.protectVars = FALSE;
02724   gc.justpopped = FALSE;
02725   gc.isNullGuarded = NO;
02726   gc.globs_used = globSet_undefined;
02727   
02728   allFlagCodes (code)
02729     {
02730       gc.setGlobally[code] = FALSE;
02731       gc.setLocally[code] = FALSE;
02732     } end_allFlagCodes ;
02733 
02734   usymtab_initMod ();
02735 
02736   context_resetAllFlags ();
02737   conext_resetAllCounters ();
02738   context_setMode (DEFAULT_MODE);
02739 }
02740 
02741 ctype
02742 context_typeofZero (void)
02743 {
02744   ctype ct = ctype_int;
02745 
02746   if (context_getFlag (FLG_ZEROPTR))
02747     {
02748       ct = ctype_makeConj (ct, ctype_voidPointer);
02749     }
02750   
02751   if (context_getFlag (FLG_ZEROBOOL)) {
02752     ct = ctype_makeConj (ct, ctype_bool); 
02753   }
02754 
02755   return ct;
02756 }
02757 
02758 ctype
02759 context_typeofOne (void)
02760 {
02761   ctype ct = ctype_int;
02762 
02763   /* 1 is on longer a bool (was before 2.4)
02764      if (!context_getFlag (FLG_ABSTRACTBOOL))
02765      {
02766      ct = ctype_makeConj (ct, ctype_bool);
02767      }
02768      */
02769 
02770   return (ct);
02771 }
02772 
02773 /*@only@*/ cstring
02774 context_unparse (void)
02775 {
02776   cstring s;
02777 
02778   switch (gc.kind)
02779     {
02780     case CX_LCL:
02781       s = message ("LCL File: %q", fileloc_unparse (g_currentloc));
02782       break;
02783     case CX_LCLLIB:
02784       s = message ("LCL Lib File: %q", fileloc_unparse (g_currentloc));
02785       break;
02786     case CX_GLOBAL:
02787       s = message ("Global Context:%q", fileloc_unparse (g_currentloc));
02788       break;
02789     case CX_INNER:
02790       s = message ("Inner Context:%q", fileloc_unparse (g_currentloc));
02791       break;
02792     case CX_FUNCTION:
02793       s = message ("Function %q :%q \n\taccess %q\n\tmodifies %q",
02794                    uentry_unparse (gc.cont.fcn),
02795                    fileloc_unparse (g_currentloc),
02796                    typeIdSet_unparse (gc.acct),
02797                    sRefSet_unparse (gc.mods));
02798       break;
02799     case CX_MACROFCN:
02800       s = message ("Function Macro %q", uentry_unparse (gc.cont.fcn));
02801       break;
02802     case CX_UNKNOWNMACRO:
02803       s = message ("Forward Specified Macro %q", uentry_unparse (gc.cont.fcn));
02804       break;
02805     case CX_MACROCONST:
02806       s = message ("Constant Macro %q", uentry_unparse (gc.cont.fcn));
02807       break;
02808     case CX_ITERDEF:
02809       s = message ("Iter definition %q", uentry_unparse (gc.cont.fcn));
02810       break;
02811     case CX_ITEREND:
02812       s = message ("Iter end %q", uentry_unparse (gc.cont.fcn));
02813       break;
02814     default:
02815       s = message ("Un-unparseable context: %d", (int) gc.kind);
02816       break;
02817     }
02818   
02819   s = message ("%q\naccess: %q", s, context_unparseAccess ());
02820   return (s);
02821 }
02822 
02823 extern ctype
02824 context_currentFunctionType (void)
02825 {
02826   if (gc.kind == CX_FUNCTION || gc.kind == CX_MACROFCN)
02827     {
02828             return (uentry_getType (gc.cont.fcn));
02829     }
02830   else if (gc.kind == CX_INNER)
02831     {
02832       llcontbuglit ("context_currentFunctionType: inner context");
02833       do { context_exitInnerPlain (); } while (gc.kind == CX_INNER);
02834       return (context_currentFunctionType ());
02835     }
02836   else
02837     {
02838       llcontbuglit ("context_currentFunctionType: not in function");
02839       return (ctype_undefined);
02840     }
02841 }
02842 
02843 void
02844 context_enterInnerContext (void)
02845 {
02846   if (gc.kind == CX_GLOBAL)
02847     {
02848       gc.kind = CX_INNER;
02849       gc.cont.cdepth = 1;
02850     }
02851   else if (gc.kind == CX_INNER)
02852     {
02853       gc.cont.cdepth++;
02854     }
02855   else
02856     {
02857       ;
02858     }
02859 
02860   
02861   usymtab_enterScope ();
02862   pushClause (NOCLAUSE);
02863 }
02864 
02865 void
02866 context_exitInnerPlain (void) /*@modifies gc;@*/
02867 {
02868   context_exitInner (exprNode_undefined);
02869 }
02870 
02871 void
02872 context_exitInner (exprNode exp)
02873 {
02874   
02875   llassertprint (gc.inclause == NOCLAUSE || gc.inclause == CASECLAUSE,
02876                  ("inclause = %s", clause_nameTaken (gc.inclause)));
02877 
02878   clauseStack_removeFirst (gc.clauses, NOCLAUSE);
02879   gc.inclause = topClause (gc.clauses);
02880 
02881   if (gc.kind == CX_INNER)
02882     {
02883       if (--gc.cont.cdepth == 0)
02884         {
02885           gc.kind = CX_GLOBAL;
02886           gc.cont.glob = TRUE;
02887         }
02888     }
02889   else 
02890     {
02891       if (gc.kind == CX_GLOBAL)
02892         {
02893           llcontbuglit ("Attempt to exit global context");
02894           return;
02895         }
02896     }
02897 
02898     usymtab_exitScope (exp);
02899 }
02900 
02901 
02902 void
02903 context_enterStructInnerContext (void)
02904 {
02905   if (gc.kind == CX_GLOBAL)
02906     {
02907       gc.kind = CX_INNER;
02908       gc.cont.cdepth = 1;
02909     }
02910   else if (gc.kind == CX_INNER)
02911     {
02912       gc.cont.cdepth++;
02913     }
02914   else
02915     {
02916       ;
02917     }
02918 
02919   usymtab_enterScope ();
02920 }
02921 
02922 void
02923 context_exitStructInnerContext (void)
02924 {
02925   if (gc.kind == CX_INNER)
02926     {
02927       if (--gc.cont.cdepth == 0)
02928         {
02929           gc.kind = CX_GLOBAL;
02930           gc.cont.glob = TRUE;
02931         }
02932     }
02933   else 
02934     {
02935       if (gc.kind == CX_GLOBAL)
02936         {
02937           llcontbuglit ("Attempt to exit global context");
02938           return;
02939         }
02940     }
02941 
02942   usymtab_exitScope (exprNode_undefined);
02943 }
02944 
02945 void
02946 context_exitInnerSafe (void)
02947 {
02948   
02949   if (gc.kind == CX_INNER)
02950     {
02951       if (--gc.cont.cdepth == 0)
02952         {
02953           gc.cont.cdepth++;
02954         }
02955     }
02956   else if (gc.kind == CX_GLOBAL)
02957     {
02958       llcontbuglit ("Attempt to exit global context");
02959       return;
02960     }
02961   else
02962     {
02963       if (usymtab_inDeepScope ())
02964         {
02965           usymtab_exitScope (exprNode_undefined);
02966         }
02967     }
02968 }
02969 
02970 static
02971 void setModuleAccess (void)
02972 {
02973   gc.facct = typeIdSet_emptySet ();
02974 
02975   if (fileId_isValid (currentFile ()))
02976     {
02977       cstring baseName = fileloc_getBase (g_currentloc);
02978       
02979       if (context_getFlag (FLG_ACCESSFILE))
02980         {
02981           if (usymtab_existsType (baseName))
02982             {
02983               gc.facct = typeIdSet_insert (gc.facct, 
02984                                            usymtab_getTypeId (baseName));
02985             }
02986           else 
02987             {
02988               ;
02989             }
02990         }
02991       
02992       if (context_getFlag (FLG_ACCESSMODULE))
02993         {
02994           int i;
02995           bool hasaccess = FALSE;
02996           
02997           for (i = 0; i < gc.nmods; i++)
02998             {
02999               if (cstring_equal (baseName, gc.moduleaccess[i].file))
03000                 {
03001                   gc.facct = typeIdSet_union (gc.facct, gc.moduleaccess[i].daccess);
03002 
03003                   hasaccess = TRUE;
03004                   break;
03005                 }
03006             }
03007         }
03008       
03009       gc.acct = gc.facct;
03010       gc.inheader = fileId_isHeader (currentFile ());
03011     }
03012   else
03013     {
03014       llcontbuglit ("Current file not defined\n");
03015       gc.facct = typeIdSet_emptySet ();
03016       gc.acct = gc.facct;
03017       gc.inheader = FALSE;
03018     }
03019   
03020   /* 17 Jan 1995: forgot to clear nacct */
03021   
03022   gc.nacct = typeIdSet_emptySet ();
03023 }
03024 
03025 static void
03026 context_enterFileAux (void)
03027 {
03028   setModuleAccess ();
03029 }
03030 
03031 void
03032 context_enterFile (void)
03033 {
03034   context_enterFileAux ();
03035   usymtab_enterFile ();
03036 }
03037 
03038 void
03039 context_enterMacroFile (void)
03040 {
03041   context_enterFileAux ();
03042 }
03043 
03044 bool 
03045 context_inFunction (void)
03046 {
03047   kcontext ck = gc.kind;
03048   
03049   return ((ck == CX_FUNCTION) || (ck == CX_MACROFCN) || (ck == CX_INNER));
03050 }
03051 
03052 bool 
03053 context_inFunctionLike (void)
03054 {
03055   return (gc.kind == CX_FUNCTION || gc.kind == CX_MACROFCN 
03056           || gc.kind == CX_UNKNOWNMACRO || gc.kind == CX_ITERDEF);
03057 }
03058 
03059 bool 
03060 context_inRealFunction (void)
03061 {
03062   kcontext ck = gc.kind;
03063   
03064   return ((ck == CX_FUNCTION) || (ck == CX_MACROFCN));
03065 }
03066   
03067 void
03068 context_processAllMacros (void)
03069 {
03070   usymtab_enterFile ();
03071 
03072   gc.inmacrocache = TRUE; 
03073   macrocache_processUndefinedElements (gc.mc);
03074   cleanupMessages ();  
03075   usymtab_exitFile ();
03076 
03077   gc.inmacrocache = FALSE;
03078   macrocache_finalize ();
03079 }
03080 
03081 /*
03082 ** this happens once at the end of each C file
03083 **
03084 ** check each Macro that was defined in current file.c or current file.h
03085 **
03086 */
03087 
03088 static void
03089 context_processMacros (void)
03090 {
03091   if (fileId_isValid (currentFile ()))
03092     {
03093       fileloc lastfl;
03094       cstring cbase = cstring_fromChars 
03095         (removePathFree
03096          (removeAnyExtension 
03097           (cstring_toCharsSafe (fileName (currentFile ())))));
03098       
03099       gc.inmacrocache = TRUE;
03100 
03101       DPRINTF (("Processing macros: %s", cbase));
03102       lastfl = macrocache_processFileElements (gc.mc, cbase);
03103       DPRINTF (("Processing macros: %s", fileloc_unparse (lastfl)));
03104 
03105       cstring_free (cbase);
03106       
03107       if (fileloc_isDefined (lastfl))
03108         {
03109           g_currentloc = fileloc_update (g_currentloc, lastfl);
03110           cleanupMessages ();
03111         }
03112 
03113       gc.inmacrocache = FALSE;
03114     }
03115 }
03116 
03117 bool
03118 context_processingMacros (void)
03119 {
03120   return (gc.inmacrocache);
03121 }
03122 
03123 void
03124 context_exitFile (void)
03125 {
03126   if (gc.kind != CX_GLOBAL)
03127     {
03128       llfatalerrorLoc
03129         (cstring_makeLiteral ("File ended outside global scope"));
03130     }
03131 
03132   if (gc.insuppressregion)
03133     {
03134      /* gack...don't reverse the order of these lines! ;-> */
03135       gc.insuppressregion = FALSE;
03136       llerrorlit (FLG_SYNTAX, 
03137                   "File ended in ignore errors region, "
03138                   "possible missing /*@end*/");
03139     }
03140 
03141   /* fix up parse errors */
03142 
03143   while (!usymtab_inFileScope ())
03144     {
03145       usymtab_quietExitScope (g_currentloc);
03146     }
03147 
03148   /*
03149   ** Clear the file-specific modifies information.
03150   */
03151   
03152   sRefSetList_elements (gc.modrecs, mods)
03153     {
03154       sRefSet_clearStatics (mods);
03155           } end_sRefSetList_elements ;
03156   
03157   sRefSetList_clear (gc.modrecs);
03158 
03159   context_processMacros ();
03160   cleanupMessages (); 
03161 
03162   usymtab_exitFile ();
03163 
03164   gc.inDerivedFile = FALSE;
03165   filelocStack_clear (gc.locstack);
03166 
03167   gc.nacct = typeIdSet_emptySet (); /* empty noaccess */
03168 
03169   gc.cont.glob = TRUE;
03170   
03171   if (gc.savedFlags)
03172     {
03173       context_restoreFlagSettings ();
03174       gc.savedFlags = FALSE;
03175     }
03176 }
03177 
03178 void
03179 context_exitMacroCache (void)
03180 {
03181   if (gc.kind != CX_GLOBAL)
03182     {
03183       if (context_inMacro ()) /* this is okay, file could end without newline in macro */
03184         {
03185           context_exitFunction ();
03186         }
03187       else
03188         {
03189           llcontbug (message ("context_exitMacroCache: outside global scope: %q", 
03190                               context_unparse ()));
03191           gc.kind = CX_GLOBAL; 
03192         }
03193     }
03194 
03195   /*
03196   ** no longer valid here
03197   ** if (gc.insuppressregion)
03198   **   {
03199   **     gc.insuppressregion = FALSE;
03200   **     llerror ("File ended in ignore errors region, possible missing @");
03201   **   }
03202   */
03203 
03204   gc.cont.glob = TRUE;
03205 }
03206 
03207 void
03208 context_saveLocation (void)
03209 {
03210   /* was llassert (fileloc_isUndefined (gc.saveloc)) */
03211       fileloc_free (gc.saveloc);
03212     
03213 
03214   gc.saveloc = fileloc_copy (g_currentloc);
03215   }
03216 
03217 fileloc
03218 context_getSaveLocation (void)
03219 {
03220   fileloc fl = gc.saveloc;
03221 
03222     gc.saveloc = fileloc_undefined;
03223   return fl;
03224 }
03225 
03226 /*@observer@*/ cstring
03227 context_inFunctionName (void)
03228 {
03229   if (gc.kind == CX_FUNCTION
03230       || gc.kind == CX_MACROFCN || gc.kind == CX_UNKNOWNMACRO 
03231       || gc.kind == CX_MACROCONST 
03232       || gc.kind == CX_ITERDEF || gc.kind == CX_ITEREND)
03233     {
03234       return (uentry_rawName (gc.cont.fcn));
03235     }
03236   else
03237     {
03238       llcontbuglit ("context_inFunctionName: not in function");
03239       return (cstring_undefined);
03240     }
03241 }
03242 
03243 void
03244 context_userSetFlag (flagcode f, bool b)
03245 {
03246   DPRINTF (("set flag: %s", flagcode_name (f)));
03247 
03248   if (f == FLG_NEVERINCLUDE && b)
03249     {
03250       if (gc.flags[FLG_EXPORTHEADER])
03251         {
03252           flagWarning (cstring_makeLiteralTemp
03253                        ("setting +neverinclude after +exportheader.  "
03254                         "Turning off exportheader, since headers are not checked "
03255                         "when +neverinclude is used."));
03256 
03257           gc.flags[FLG_EXPORTHEADER] = FALSE;
03258         }
03259     }
03260   else 
03261     {
03262       if (f == FLG_EXPORTHEADER && b)
03263         {
03264           if (gc.flags[FLG_NEVERINCLUDE])
03265             {
03266               flagWarning (cstring_makeLiteralTemp
03267                            ("setting +exportheader after +neverinclude.  "
03268                             "Not setting exportheader, since headers are not checked "
03269                             "when +neverinclude is used."));
03270               gc.flags[FLG_EXPORTHEADER] = FALSE;
03271               return;
03272             }
03273         }
03274     }
03275   
03276   if (context_getFlag (FLG_WARNFLAGS) && f != FLG_NOF && f != FLG_OPTF)
03277     {
03278       bool lastsetting = context_getFlag (f);
03279       
03280       if (bool_equal (lastsetting, b)
03281           && !flagcode_isSpecialFlag (f) 
03282           && !flagcode_isIdemFlag (f)
03283           && !flagcode_hasArgument (f))
03284         {
03285           cstring warn = message ("setting %s%s redundant with current value", 
03286                                   cstring_makeLiteralTemp (b ? "+" : "-"),
03287                                   flagcode_name (f));
03288           flagWarning (warn);
03289           cstring_free (warn);
03290         }
03291     }
03292 
03293   if (flagcode_isLibraryFlag (f)) 
03294     {
03295       if (gc.library != FLG_ANSILIB
03296           && gc.library != f)
03297         {
03298           cstring warn = message ("selecting library %s after library %s was "
03299                                   "selected (only one library may be used)",
03300                                   flagcode_name (f),
03301                                   flagcode_name (gc.library));
03302           flagWarning (warn);
03303           cstring_free (warn);
03304         }
03305 
03306       if (f == FLG_UNIXLIB)
03307         {
03308           if (context_getFlag (FLG_WARNUNIXLIB))
03309             {
03310               flagWarning (cstring_makeLiteralTemp 
03311                            ("selecting unix library.  Unix library is "
03312                             "ad hoc addition to POSIX library.  Recommend "
03313                             "use +posixlib to select POSIX library instead. "
03314                             "Use -warnunixlib to suppress this message."));
03315             }
03316         }
03317       
03318       gc.library = f;
03319     }
03320   
03321   gc.setGlobally[f] = TRUE;
03322   context_setFlag (f, b);
03323 }
03324 
03325 void
03326 context_fileSetFlag (flagcode f, ynm set)
03327 {
03328   if (!gc.savedFlags)
03329     {
03330       context_saveFlagSettings ();
03331     }
03332 
03333   if (ynm_isOff (set))
03334     {
03335       context_setFlagAux (f, FALSE, TRUE, FALSE);
03336     }
03337   else if (ynm_isOn (set))
03338     {
03339       context_setFlagAux (f, TRUE, TRUE, FALSE);
03340       gc.setLocally[f] = TRUE;
03341     }
03342   else
03343     {
03344       context_restoreFlag (f);
03345     }
03346 }
03347 
03348 static void
03349 context_restoreFlag (flagcode f)
03350 {
03351   
03352   if (!gc.savedFlags)
03353     {
03354       voptgenerror 
03355         (FLG_SYNTAX,
03356          message ("Attempt to restore flag %s when no file scope flags "
03357                   "have been set.",
03358                   flagcode_unparse (f)),
03359          g_currentloc);
03360     }
03361   else
03362     {
03363       context_addFlagMarker (f, MAYBE);
03364       context_setFlagAux (f, gc.saveflags[f], FALSE, TRUE);
03365     }
03366 
03367   }
03368 
03369 static void
03370 context_setFlag (flagcode f, bool b)
03371 {
03372   context_setFlagAux (f, b, FALSE, FALSE);
03373 }
03374 
03375 void
03376 context_setFlagTemp (flagcode f, bool b)
03377 {
03378   DPRINTF (("Set flag temp: %s / %s", flagcode_unparse (f), bool_unparse (b)));
03379   gc.flags[f] = b;
03380 }
03381 
03382 /*@notfunction@*/
03383 # define DOSET(ff,b) \
03384    do { if (inFile) { gc.setLocally[ff] = TRUE; \
03385                       context_addFlagMarker (ff, ynm_fromBool (b)); } \
03386         DPRINTF (("set flag: %s / %s", flagcode_name (ff), bool_unparse (b))); \
03387         gc.flags[ff] = b; } while (FALSE)
03388 
03389 static void
03390   context_setFlagAux (flagcode f, bool b, bool 
03391                       inFile, /*@unused@*/ bool isRestore)
03392 {
03393   DPRINTF (("set flag: %s / %s", flagcode_unparse (f), bool_unparse (b)));
03394 
03395   if (f == FLG_USESTDERR) 
03396     {
03397       if (b) {
03398         g_msgstream = stderr;
03399       } else {
03400         g_msgstream = stdout;
03401       }
03402     }
03403 
03404   if (flagcode_isSpecialFlag (f))
03405     {
03406       gc.flags[f] = b;
03407 
03408       
03409       switch (f)
03410         {     
03411         case FLG_ALLEMPTY:
03412           DOSET (FLG_ALLEMPTY, b);
03413           DOSET (FLG_IFEMPTY, b);
03414           DOSET (FLG_WHILEEMPTY, b);
03415           DOSET (FLG_FOREMPTY, b);
03416           break;
03417         case FLG_PREDBOOL:
03418           DOSET (FLG_PREDBOOL, b);
03419           DOSET (FLG_PREDBOOLINT, b);
03420           DOSET (FLG_PREDBOOLPTR, b);
03421           DOSET (FLG_PREDBOOLOTHERS, b);
03422           break;
03423         case FLG_GLOBALIAS:
03424           DOSET (FLG_CHECKSTRICTGLOBALIAS, b);
03425           DOSET (FLG_CHECKEDGLOBALIAS, b);
03426           DOSET (FLG_CHECKMODGLOBALIAS, b);
03427           DOSET (FLG_UNCHECKEDGLOBALIAS, b);
03428           break;
03429         case FLG_ALLBLOCK:
03430           DOSET (FLG_ALLBLOCK, b);
03431           DOSET (FLG_IFBLOCK, b);
03432           DOSET (FLG_WHILEBLOCK, b);
03433           DOSET (FLG_FORBLOCK, b);
03434           break;
03435         case FLG_GRAMMAR:
03436           if (b)
03437             {
03438               yydebug = 1;
03439             }
03440           else
03441             {
03442               yydebug = 0;
03443             }
03444           
03445           DOSET (FLG_GRAMMAR, b);
03446           break;
03447         case FLG_CODEIMPONLY:
03448           DOSET (FLG_CODEIMPONLY, b);
03449           DOSET (FLG_GLOBIMPONLY, b);
03450           DOSET (FLG_RETIMPONLY, b);
03451           DOSET (FLG_STRUCTIMPONLY, b);
03452           break;
03453         case FLG_SPECALLIMPONLY:
03454                   DOSET (FLG_SPECALLIMPONLY, b);
03455           DOSET (FLG_SPECGLOBIMPONLY, b);
03456           DOSET (FLG_SPECRETIMPONLY, b);
03457           DOSET (FLG_SPECSTRUCTIMPONLY, b);
03458           break;
03459         case FLG_ALLIMPONLY:
03460           DOSET (FLG_ALLIMPONLY, b);
03461           DOSET (FLG_GLOBIMPONLY, b);
03462           DOSET (FLG_RETIMPONLY, b);
03463           DOSET (FLG_STRUCTIMPONLY, b);
03464           DOSET (FLG_SPECGLOBIMPONLY, b);
03465           DOSET (FLG_SPECRETIMPONLY, b);
03466           DOSET (FLG_SPECSTRUCTIMPONLY, b);
03467           break;
03468         case FLG_ANSILIMITS: 
03469           DOSET (FLG_ANSILIMITS, b);
03470           DOSET (FLG_CONTROLNESTDEPTH, b);
03471           DOSET (FLG_STRINGLITERALLEN, b);
03472           DOSET (FLG_INCLUDENEST, b);
03473           DOSET (FLG_NUMSTRUCTFIELDS, b);
03474           DOSET (FLG_NUMENUMMEMBERS, b);
03475           
03476           if (b)
03477             {
03478               context_setValue (FLG_CONTROLNESTDEPTH, DEFAULT_CONTROLNESTDEPTH);
03479               context_setValue (FLG_STRINGLITERALLEN, DEFAULT_STRINGLITERALLEN);
03480               context_setValue (FLG_INCLUDENEST, DEFAULT_INCLUDENEST);
03481               context_setValue (FLG_NUMSTRUCTFIELDS, DEFAULT_NUMSTRUCTFIELDS);
03482               context_setValue (FLG_NUMENUMMEMBERS, DEFAULT_NUMENUMMEMBERS);
03483             }
03484           break;
03485         case FLG_EXTERNALNAMELEN:
03486           DOSET (FLG_DISTINCTEXTERNALNAMES, TRUE);
03487           DOSET (FLG_EXTERNALNAMELEN, TRUE);
03488           break;
03489         case FLG_INTERNALNAMELEN:
03490           DOSET (FLG_DISTINCTINTERNALNAMES, TRUE);
03491           DOSET (FLG_INTERNALNAMELEN, TRUE);
03492           break;
03493         case FLG_EXTERNALNAMECASEINSENSITIVE:
03494           DOSET (FLG_EXTERNALNAMECASEINSENSITIVE, b);
03495 
03496           if (b && !gc.flags[FLG_DISTINCTEXTERNALNAMES])
03497             {
03498               DOSET (FLG_DISTINCTEXTERNALNAMES, TRUE);
03499               context_setValue (FLG_EXTERNALNAMELEN, 0);
03500             }
03501           break;
03502         case FLG_INTERNALNAMECASEINSENSITIVE:
03503           DOSET (FLG_INTERNALNAMECASEINSENSITIVE, b);
03504 
03505           if (b && !gc.flags[FLG_DISTINCTINTERNALNAMES])
03506             {
03507               DOSET (FLG_DISTINCTINTERNALNAMES, TRUE);
03508               context_setValue (FLG_INTERNALNAMELEN, 0);
03509             }
03510           break;
03511         case FLG_INTERNALNAMELOOKALIKE:
03512           DOSET (FLG_INTERNALNAMELOOKALIKE, b);
03513 
03514           if (b && !gc.flags[FLG_DISTINCTINTERNALNAMES])
03515             {
03516               DOSET (FLG_DISTINCTINTERNALNAMES, TRUE);
03517               context_setValue (FLG_INTERNALNAMELEN, 0);
03518             }
03519           break;
03520         case FLG_MODUNSPEC:
03521           DOSET (FLG_MODNOMODS, b);
03522           DOSET (FLG_MODGLOBSUNSPEC, b);
03523           DOSET (FLG_MODSTRICTGLOBSUNSPEC, b);
03524           break;
03525         case FLG_EXPORTANY: 
03526           DOSET (FLG_EXPORTVAR, b);
03527           DOSET (FLG_EXPORTFCN, b);
03528           DOSET (FLG_EXPORTTYPE, b);
03529           DOSET (FLG_EXPORTMACRO, b);
03530           DOSET (FLG_EXPORTCONST, b);
03531           gc.anyExports = TRUE;
03532           break;
03533         case FLG_REPEXPOSE:
03534           DOSET (FLG_RETEXPOSE, b); 
03535           DOSET (FLG_ASSIGNEXPOSE, b); 
03536           DOSET (FLG_CASTEXPOSE, b); 
03537           break;
03538         case FLG_RETVAL:
03539           DOSET (FLG_RETVALBOOL, b);
03540           DOSET (FLG_RETVALINT, b);
03541           DOSET (FLG_RETVALOTHER, b);
03542           break;
03543         case FLG_PARTIAL:
03544           if (b)
03545             {
03546               DOSET (FLG_EXPORTLOCAL, FALSE);
03547               DOSET (FLG_DECLUNDEF, FALSE);
03548               DOSET (FLG_SPECUNDEF, FALSE);
03549               DOSET (FLG_TOPUNUSED, FALSE);
03550             }
03551           break;
03552         case FLG_DEEPBREAK:
03553           DOSET (FLG_LOOPLOOPBREAK, b);
03554           DOSET (FLG_LOOPSWITCHBREAK, b);
03555           DOSET (FLG_SWITCHLOOPBREAK, b);
03556           DOSET (FLG_SWITCHSWITCHBREAK, b);
03557           DOSET (FLG_LOOPLOOPCONTINUE, b);
03558           DOSET (FLG_DEEPBREAK, b);
03559           break;
03560         case FLG_ACCESSALL:
03561           DOSET (FLG_ACCESSMODULE, b);
03562           DOSET (FLG_ACCESSFILE, b);
03563           DOSET (FLG_ACCESSCZECH, b);
03564           break;
03565         case FLG_ALLMACROS:
03566           DOSET (FLG_ALLMACROS, b);
03567           DOSET (FLG_FCNMACROS, b);
03568           DOSET (FLG_CONSTMACROS, b);
03569           break;
03570         case FLG_CZECH:
03571           if (b) { DOSET (FLG_ACCESSCZECH, b); }
03572           DOSET (FLG_CZECHFUNCTIONS, b);
03573           DOSET (FLG_CZECHVARS, b);
03574           DOSET (FLG_CZECHCONSTANTS, b);
03575           DOSET (FLG_CZECHTYPES, b);
03576           break;
03577         case FLG_SLOVAK:
03578           if (b) { DOSET (FLG_ACCESSSLOVAK, b); }
03579           DOSET (FLG_SLOVAKFUNCTIONS, b);
03580           DOSET (FLG_SLOVAKVARS, b);
03581           DOSET (FLG_SLOVAKCONSTANTS, b);
03582           DOSET (FLG_SLOVAKTYPES, b);
03583           break;
03584         case FLG_CZECHOSLOVAK:
03585           if (b) { DOSET (FLG_ACCESSCZECHOSLOVAK, b); }
03586           DOSET (FLG_CZECHOSLOVAKFUNCTIONS, b);
03587           DOSET (FLG_CZECHOSLOVAKVARS, b);
03588           DOSET (FLG_CZECHOSLOVAKCONSTANTS, b);
03589           DOSET (FLG_CZECHOSLOVAKTYPES, b);
03590           break;
03591         case FLG_NULL:
03592           DOSET (FLG_NULLSTATE, b);
03593           DOSET (FLG_NULLDEREF, b);
03594           DOSET (FLG_NULLASSIGN, b);
03595           DOSET (FLG_NULLPASS, b);
03596           DOSET (FLG_NULLRET, b);
03597           break;
03598         case FLG_MEMCHECKS:
03599           DOSET (FLG_NULLSTATE, b);
03600           DOSET (FLG_NULLDEREF, b);
03601           DOSET (FLG_NULLASSIGN, b);
03602           DOSET (FLG_NULLPASS, b);
03603           DOSET (FLG_NULLRET, b);
03604           DOSET (FLG_COMPDEF, b);
03605           DOSET (FLG_COMPMEMPASS, b);
03606           DOSET (FLG_UNIONDEF, b);
03607           DOSET (FLG_MEMTRANS, b);
03608           DOSET (FLG_USERELEASED, b);
03609           DOSET (FLG_ALIASUNIQUE, b);
03610           DOSET (FLG_MAYALIASUNIQUE, b);
03611           DOSET (FLG_MUSTFREE, b);
03612           DOSET (FLG_MUSTDEFINE, b);
03613           DOSET (FLG_GLOBSTATE, b); 
03614           DOSET (FLG_COMPDESTROY, b);
03615           DOSET (FLG_MUSTNOTALIAS, b);
03616           DOSET (FLG_MEMIMPLICIT, b);
03617           DOSET (FLG_BRANCHSTATE, b); 
03618           /*@fallthrough@*/ /* also sets memtrans flags */
03619         case FLG_MEMTRANS:
03620           DOSET (FLG_MEMTRANS, b);
03621           DOSET (FLG_EXPOSETRANS, b);
03622           DOSET (FLG_OBSERVERTRANS, b);
03623           DOSET (FLG_DEPENDENTTRANS, b);
03624           DOSET (FLG_NEWREFTRANS, b);
03625           DOSET (FLG_ONLYTRANS, b);
03626           DOSET (FLG_OWNEDTRANS, b);
03627           DOSET (FLG_FRESHTRANS, b);
03628           DOSET (FLG_SHAREDTRANS, b);
03629           DOSET (FLG_TEMPTRANS, b);
03630           DOSET (FLG_KEPTTRANS, b);
03631           DOSET (FLG_REFCOUNTTRANS, b);
03632           DOSET (FLG_STATICTRANS, b);
03633           DOSET (FLG_UNKNOWNTRANS, b);
03634           DOSET (FLG_KEEPTRANS, b);
03635           DOSET (FLG_IMMEDIATETRANS, b);
03636           break;
03637 
03638         default:
03639           llcontbug (message ("Unhandled special flag: %s", 
03640                               flagcode_unparse (f)));
03641           break;
03642         }
03643     }
03644   else
03645     {
03646       if (flagcode_isIdemFlag (f))
03647         {
03648           DOSET (f, TRUE);
03649         }
03650       else
03651         {
03652           if (b && !gc.anyExports
03653               && (f == FLG_EXPORTVAR || f == FLG_EXPORTFCN
03654                   || f == FLG_EXPORTTYPE || f == FLG_EXPORTMACRO
03655                   || f == FLG_EXPORTCONST
03656                   || f == FLG_EXPORTANY))
03657             {
03658               gc.anyExports = TRUE;
03659             }
03660 
03661           DOSET (f, b);
03662         }
03663     }
03664 }
03665 
03666 bool 
03667 context_maybeSet (flagcode d)
03668 {
03669   return (gc.flags[d] || gc.setLocally[d]);
03670 }
03671 
03672 bool
03673 context_getFlag (flagcode d)
03674 {
03675   return (gc.flags[d]);
03676 }
03677 
03678 static void context_saveFlagSettings (void)
03679 {
03680   gc.savedFlags = TRUE;
03681   llassert (sizeof (gc.saveflags) == sizeof (gc.flags));
03682   memcpy (gc.saveflags, gc.flags, sizeof (gc.flags));
03683 }
03684 
03685 static void context_restoreFlagSettings (void)
03686 {
03687   llassert (sizeof (gc.saveflags) == sizeof (gc.flags));
03688   memcpy (gc.flags, gc.saveflags, sizeof (gc.flags));
03689   gc.savedFlags = FALSE;
03690 }
03691 
03692 void context_setFilename (fileId fid, int lineno) 
03693    /*@globals fileloc g_currentloc;@*/
03694    /*@modifies g_currentloc@*/
03695 {
03696   if (fileId_baseEqual (currentFile (), fid))
03697     {
03698       setLine (lineno);
03699       return;
03700     }
03701   else
03702     {
03703       fileloc_setColumn (g_currentloc, 0);
03704 
03705       if (fileloc_isSpecialFile (g_currentloc))
03706         {
03707           gc.inDerivedFile = TRUE;
03708         }
03709 
03710       if (filelocStack_popPushFile (gc.locstack, g_currentloc))
03711         {
03712           int maxdepth = context_getValue (FLG_INCLUDENEST);
03713 
03714           if (filelocStack_size (gc.locstack) > maxdepth)
03715             {
03716               int depth = filelocStack_includeDepth (gc.locstack);
03717               
03718               if (depth > maxdepth)
03719                 {
03720                   if (optgenerror 
03721                       (FLG_INCLUDENEST,
03722                        message ("Maximum include nesting depth "
03723                                 "(%d, current depth %d) exceeded",
03724                                 maxdepth,
03725                                 depth),
03726                        filelocStack_nextTop (gc.locstack)))
03727                     {
03728                       filelocStack_printIncludes (gc.locstack);
03729                     }
03730                 }
03731             }
03732         }
03733       
03734       g_currentloc = fileloc_create (fid, lineno, 1);
03735       gc.inheader = fileId_isHeader (currentFile ());
03736 
03737       context_enterFileAux ();
03738     }
03739 }
03740 
03741 void context_enterIterDef (/*@observer@*/ uentry le)
03742 {
03743     context_enterMacro (le);
03744   gc.acct = typeIdSet_subtract (gc.facct, gc.nacct);
03745   gc.kind = CX_ITERDEF;
03746 }
03747 
03748 void context_enterIterEnd (/*@observer@*/ uentry le)
03749 {
03750     context_enterMacro (le);
03751   gc.kind = CX_ITEREND;
03752 }
03753 
03754 void 
03755 context_destroyMod (void) 
03756    /*@globals killed gc@*/
03757 {
03758   setCodePoint ();
03759   ctype_destroyMod ();
03760   setCodePoint ();
03761   usymtab_free ();
03762   setCodePoint ();
03763   fileTable_free (gc.ftab);
03764   filelocStack_free (gc.locstack);
03765   setCodePoint ();
03766   gc.ftab = fileTable_undefined;
03767 
03768   macrocache_free (gc.mc);
03769   sfree (gc.moduleaccess);
03770   setCodePoint ();
03771 
03772   fileloc_free (gc.saveloc); gc.saveloc = fileloc_undefined;
03773   fileloc_free (gc.pushloc); gc.pushloc = fileloc_undefined;
03774 
03775   setCodePoint ();
03776   sRefSetList_free (gc.modrecs);
03777   setCodePoint ();
03778   flagMarkerList_free (gc.markers); 
03779   setCodePoint ();
03780   messageLog_free (gc.msgLog);
03781   setCodePoint ();
03782   clauseStack_free (gc.clauses);
03783   setCodePoint ();
03784   
03785   cstring_free (gc.msgAnnote);
03786   globSet_free (gc.globs_used);
03787   }
03788 
03789 /*
03790 ** Flag shortcuts.
03791 */
03792 
03793 bool context_msgBoolInt (void)
03794 {
03795   return gc.flags [FLG_BOOLINT];
03796 }
03797 
03798 bool context_msgCharInt (void)
03799 {
03800   return gc.flags [FLG_CHARINT];
03801 }
03802 
03803 bool context_msgEnumInt (void)
03804 {
03805   return gc.flags [FLG_ENUMINT];
03806 }
03807 
03808 bool context_msgPointerArith (void) 
03809 {
03810   return gc.flags [FLG_POINTERARITH];
03811 }
03812 
03813 bool context_msgStrictOps (void) 
03814 {
03815   return gc.flags [FLG_STRICTOPS];
03816 }
03817 
03818 # ifndef NOLCL
03819 bool context_msgLh (void)           
03820 {
03821   return gc.flags [FLG_DOLH];
03822 }
03823 # endif
03824 
03825 void context_pushLoc (void) 
03826 {
03827   fileloc_free (gc.pushloc);
03828   gc.pushloc = gc.saveloc;
03829   gc.saveloc = fileloc_undefined;
03830 }
03831 
03832 void context_popLoc (void) 
03833 {
03834   gc.saveloc = fileloc_update (gc.saveloc, gc.pushloc);
03835 }
03836 
03837 bool context_inGlobalScope (void)
03838 {
03839   return (usymtab_inFileScope() || usymtab_inGlobalScope ());
03840 }
03841 
03842 bool context_inInnerScope (void)
03843 {
03844   return (gc.kind == CX_INNER);
03845 }
03846 
03847 void context_setProtectVars (void)
03848 {
03849   gc.protectVars = TRUE;
03850 }
03851 
03852 bool context_anyErrors (void)
03853 {
03854   return (gc.numerrors > 0);
03855 }
03856 
03857 void context_hasError (void)
03858 {
03859   gc.numerrors++;
03860 }
03861 
03862 int context_numErrors (void)
03863 {
03864   return gc.numerrors;
03865 }
03866 
03867 bool context_neednl (void)
03868 {
03869   return gc.neednl;
03870 }
03871 
03872 void context_setNeednl (void)
03873 {
03874   gc.neednl = TRUE;
03875 }
03876 
03877 int context_getExpect (void)
03878 {
03879   return (context_getValue (FLG_EXPECT));
03880 }
03881 
03882 # ifndef NOLCL
03883 int context_getLCLExpect (void)
03884 {
03885   return (context_getValue (FLG_LCLEXPECT));
03886 }
03887 # endif
03888 
03889 int context_getLimit (void)
03890 {
03891   return (context_getValue (FLG_LIMIT));
03892 }
03893 
03894 bool context_unlimitedMessages (void)
03895 {
03896   return (context_getLimit () < 0);
03897 }
03898 
03899 void context_releaseVars (void)
03900 {
03901   llassert (gc.protectVars);
03902   gc.protectVars = FALSE;
03903 }
03904 
03905 void context_sizeofReleaseVars (void)
03906 {
03907   /* If there is a nested sizeof, this might not hold:
03908      llassert (gc.protectVars);
03909      */
03910 
03911   gc.protectVars = FALSE;
03912 }
03913 
03914 bool context_inProtectVars (void)
03915 {
03916   return (gc.protectVars);
03917 }
03918 
03919 void context_hideShowscan (void) 
03920 {
03921   gc.flags[FLG_SHOWSCAN] = FALSE;
03922 }
03923 
03924 void context_unhideShowscan (void)
03925 {
03926   gc.flags[FLG_SHOWSCAN] = TRUE;
03927 }
03928 
03929 bool context_inHeader (void)
03930 {
03931   return (gc.inheader);
03932 }
03933 
03934 fileTable context_fileTable (void)
03935 {
03936   return gc.ftab;
03937 }
03938 
03939 cstring context_tmpdir (void)
03940 {
03941   return (context_getString (FLG_TMPDIR));
03942 }
03943 
03944 messageLog context_messageLog (void)
03945 {
03946   return gc.msgLog;
03947 }
03948 
03949 bool context_inMacroFunction (void)
03950 {
03951   return (gc.kind == CX_MACROFCN);
03952 }
03953 
03954 bool context_inMacroConstant (void)
03955 {   
03956   return (gc.kind == CX_MACROCONST);
03957 }
03958 
03959 bool context_inMacroUnknown (void)
03960 {   
03961   return (gc.kind == CX_UNKNOWNMACRO);
03962 }
03963 
03964 void context_setShownFunction (void)
03965 {
03966   gc.showfunction = FALSE;
03967 }
03968 
03969 bool context_doDump (void)
03970 {   
03971   return cstring_isNonEmpty (context_getString (FLG_DUMP));
03972 }
03973 
03974 bool context_doMerge (void)
03975 {
03976   return cstring_isNonEmpty (context_getString (FLG_MERGE));
03977 }
03978 
03979 cstring context_getDump (void)
03980 {           
03981   return context_getString (FLG_DUMP);
03982 }
03983 
03984 cstring context_getMerge (void)
03985 {
03986   return context_getString (FLG_MERGE);
03987 }
03988 
03989 # ifndef NOLCL
03990 bool context_inLCLLib (void)
03991 {   
03992   return (gc.kind == CX_LCLLIB);
03993 }
03994 
03995 bool context_inImport (void)
03996 {
03997   return (gc.inimport);
03998 }
03999 
04000 void context_enterImport (void)
04001 { 
04002   gc.inimport = TRUE;
04003 }
04004 
04005 void context_leaveImport (void)
04006 { 
04007   gc.inimport = FALSE;
04008 }
04009 # endif
04010 
04011 bool context_inMacro (void) 
04012 {
04013   return (gc.kind == CX_MACROFCN || gc.kind == CX_MACROCONST 
04014           || gc.kind == CX_UNKNOWNMACRO
04015           || gc.kind == CX_ITERDEF || gc.kind == CX_ITEREND);
04016 }
04017 
04018 bool context_inIterDef (void)
04019 {
04020   return (gc.kind == CX_ITERDEF);
04021 }
04022 
04023 bool context_inIterEnd (void)
04024 {
04025   return (gc.kind == CX_ITEREND);
04026 }
04027 
04028 int context_getLinesProcessed (void)    
04029 {
04030   return (gc.linesprocessed);
04031 }
04032 
04033 int context_getSpecLinesProcessed (void)    
04034 {
04035   return (gc.speclinesprocessed);
04036 }
04037 
04038 # ifndef NOLCL
04039 void context_processedSpecLine (void)
04040 {
04041   gc.speclinesprocessed++;
04042 }
04043 
04044 void context_resetSpecLines (void)    
04045 {
04046   gc.speclinesprocessed = 0;
04047 }
04048 # endif
04049 
04050 bool context_inGlobalContext (void)
04051 {
04052   return (gc.kind == CX_GLOBAL);
04053 }
04054 
04055 void context_setFileId (fileId s)
04056 {
04057   g_currentloc = fileloc_updateFileId (g_currentloc, s); 
04058 }
04059 
04060 bool context_setBoolName (void)
04061 {
04062   return (!cstring_equalLit (context_getString (FLG_BOOLTYPE),
04063                              DEFAULT_BOOLTYPE));
04064 }
04065 
04066 cstring context_printBoolName (void)
04067 {
04068   if (context_setBoolName ()) 
04069     {
04070       return context_getBoolName ();
04071     }
04072   else
04073     {
04074       return cstring_makeLiteralTemp ("boolean");
04075     }
04076 }
04077 
04078 cstring context_getBoolName (void)
04079 {
04080   return (context_getString (FLG_BOOLTYPE));
04081 }
04082 
04083 cstring context_getFalseName (void)
04084 {
04085   return (context_getString (FLG_BOOLFALSE));
04086 }
04087 
04088 cstring context_getTrueName (void)
04089 {
04090   return (context_getString (FLG_BOOLTRUE));
04091 }
04092 
04093 cstring context_getLarchPath (void)
04094 {
04095   return (context_getString (FLG_LARCHPATH));
04096 }
04097 
04098 cstring context_getLCLImportDir (void)
04099 {
04100   return (context_getString (FLG_LCLIMPORTDIR));
04101 }
04102 
04103 static void context_setJustPopped (void)
04104 {
04105   gc.justpopped = TRUE;
04106 }
04107 
04108 void context_clearJustPopped (void)
04109 {
04110   gc.justpopped = FALSE;
04111 }
04112 
04113 bool context_justPopped (void)
04114 {
04115   return (gc.justpopped);
04116 }
04117 
04118 void context_setMacroMissingParams (void)
04119 {
04120   gc.macroMissingParams = TRUE;
04121 }
04122 
04123 void context_resetMacroMissingParams (void)
04124 {
04125   gc.macroMissingParams = FALSE;
04126 }
04127 
04128 bool context_isMacroMissingParams (void)
04129 {
04130   return (gc.macroMissingParams);
04131 }
04132 
04133 void context_showFilelocStack (void) 
04134 {
04135   filelocStack_printIncludes (gc.locstack);
04136 }
04137 
04138 
04139 
04140 
04141 
04142 
04143