/*
-** constraintExpr.c
+** Splint - annotation-assisted static program checker
+** Copyright (C) 1994-2003 University of Virginia,
+** Massachusetts Institute of Technology
+**
+** This program is free software; you can redistribute it and/or modify it
+** under the terms of the GNU General Public License as published by the
+** Free Software Foundation; either version 2 of the License, or (at your
+** option) any later version.
+**
+** This program is distributed in the hope that it will be useful, but
+** WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+** General Public License for more details.
+**
+** The GNU General Public License is available from http://www.gnu.org/ or
+** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+** MA 02111-1307, USA.
+**
+** For information on splint: info@splint.org
+** To report a bug: splint-bug@splint.org
+** For more information: http://www.splint.org
*/
+/*
+** constraintTerm.c
+*/
+
+/* #define DEBUGPRINT 1 */
+
# include <ctype.h> /* for isdigit */
-# include "lclintMacros.nf"
+# include "splintMacros.nf"
# include "basic.h"
# include "cgrammar.h"
# include "cgrammar_tokens.h"
# include "exprChecks.h"
-# include "aliasChecks.h"
# include "exprNodeSList.h"
-//# include "exprData.i"
+bool constraintTerm_isDefined (constraintTerm t)
+{
+ return t != NULL;
+}
-/*@-czechfcns@*/
+void constraintTerm_free (/*@only@*/ constraintTerm term)
+{
+ llassert (constraintTerm_isDefined (term));
+
+ fileloc_free (term->loc);
+
+ switch (term->kind)
+ {
+ case CTT_EXPR:
+ /* we don't free an exprNode*/
+ break;
+ case CTT_SREF:
+ /* sref */
+ sRef_free (term->value.sref);
+ break;
+ case CTT_INTLITERAL:
+ /* don't free an int */
+ break;
+ case CTT_ERRORBADCONSTRAINTTERMTYPE:
+ default:
+ /* type was set incorrectly */
+ llcontbug (message("constraintTerm_free type was set incorrectly"));
+ }
+
+ term->kind = CTT_ERRORBADCONSTRAINTTERMTYPE;
+ free (term);
+}
+
+/*@only@*/ static/*@out@*/ constraintTerm new_constraintTermExpr (void)
+{
+ constraintTerm ret;
+ ret = dmalloc (sizeof (* ret ) );
+ ret->value.intlit = 0;
+ return ret;
+}
-//#include "constraintExpr.h"
bool constraintTerm_isIntLiteral (constraintTerm term)
{
- llassert(term);
+ llassert(term != NULL);
- if (term->kind == INTLITERAL)
+ if (term->kind == CTT_INTLITERAL)
return TRUE;
return FALSE;
}
-constraintTerm constraintTerm_simplify (constraintTerm term)
+
+bool constraintTerm_isInitBlock (/*@observer@*/ /*@temp@*/ constraintTerm c) /*@*/
+{
+ llassert (c != NULL);
+
+ if (c->kind == CTT_EXPR)
+ {
+ if (exprNode_isInitBlock (c->value.expr))
+ {
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+
+bool constraintTerm_isExprNode (/*@observer@*/ /*@temp@*/ constraintTerm c) /*@*/
+{
+ llassert (c != NULL);
+
+ if (c->kind == CTT_EXPR)
+ {
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*@access exprNode@*/
+int constraintTerm_getInitBlockLength (/*@observer@*/ /*@temp@*/ constraintTerm c) /*@*/
+{
+ exprNodeList list;
+ int ret;
+ llassert (c != NULL);
+ llassert (constraintTerm_isInitBlock (c) );
+ llassert (c->kind == CTT_EXPR);
+
+ llassert(exprNode_isDefined(c->value.expr) );
+
+ if (exprNode_isUndefined(c->value.expr) )
+ {
+ return 1;
+ }
+
+ if (c->value.expr->edata == exprData_undefined)
+ {
+ return 1;
+ }
+ list = exprData_getArgs(c->value.expr->edata);
+
+ ret = exprNodeList_size(list);
+
+ return ret;
+}
+/*@noaccess exprNode@*/
+
+
+bool constraintTerm_isStringLiteral (constraintTerm c) /*@*/
+{
+ llassert (c != NULL);
+ if (c->kind == CTT_EXPR)
+ {
+ if (exprNode_knownStringValue(c->value.expr) )
+ {
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+
+
+cstring constraintTerm_getStringLiteral (constraintTerm c)
+{
+ llassert (c != NULL);
+ llassert (constraintTerm_isStringLiteral (c) );
+ llassert (c->kind == CTT_EXPR);
+
+ return (cstring_copy ( multiVal_forceString (exprNode_getValue (c->value.expr) ) ) );
+}
+
+constraintTerm constraintTerm_simplify (/*@returned@*/ constraintTerm term) /*@modifies term@*/
{
- if (term->kind == EXPRNODE)
+ if (term->kind == CTT_EXPR)
{
if ( exprNode_knownIntValue (term->value.expr ) )
{
- int temp;
+ long int temp;
+
temp = exprNode_getLongValue (term->value.expr);
- term->value.intlit = temp;
- term->kind = INTLITERAL;
+ term->value.intlit = (int)temp;
+ term->kind = CTT_INTLITERAL;
}
}
return term;
fileloc constraintTerm_getFileloc (constraintTerm t)
{
+ llassert (constraintTerm_isDefined (t));
return (fileloc_copy (t->loc) );
}
-constraintTerm constraintTerm_makeExprNode (/*@only@*/ exprNode e)
+constraintTermType constraintTerm_getKind (constraintTerm t)
+{
+ llassert (constraintTerm_isDefined(t) );
+
+ return (t->kind);
+}
+
+/*@exposed@*/ sRef constraintTerm_getSRef (constraintTerm t)
+{
+ llassert (constraintTerm_isDefined(t) );
+ llassert (t->kind == CTT_SREF);
+
+ return (t->value.sref);
+}
+
+/*@only@*/ constraintTerm constraintTerm_makeExprNode (/*@dependent@*/ exprNode e)
{
constraintTerm ret = new_constraintTermExpr();
- ret->loc = exprNode_getfileloc(e);
+ ret->loc = fileloc_copy(exprNode_getfileloc(e));
ret->value.expr = e;
- ret->kind = EXPRNODE;
+ ret->kind = CTT_EXPR;
ret = constraintTerm_simplify(ret);
return ret;
}
-constraintTerm constraintTerm_makesRef (/*@only@*/ sRef s)
+/*@only@*/ constraintTerm constraintTerm_makesRef (/*@temp@*/ /*@observer@*/ sRef s)
{
constraintTerm ret = new_constraintTermExpr();
ret->loc = fileloc_undefined;
- ret->value.sref = s;
- ret->kind = SREF;
+ ret->value.sref = sRef_saveCopy(s);
+ ret->kind = CTT_SREF;
ret = constraintTerm_simplify(ret);
return ret;
}
+
+
constraintTerm constraintTerm_copy (constraintTerm term)
{
constraintTerm ret;
ret = new_constraintTermExpr();
ret->loc = fileloc_copy (term->loc);
- ret->value= term->value;
+
+ switch (term->kind)
+ {
+ case CTT_EXPR:
+ ret->value.expr = term->value.expr;
+ break;
+ case CTT_INTLITERAL:
+ ret->value.intlit = term->value.intlit;
+ break;
+
+ case CTT_SREF:
+ ret->value.sref = sRef_saveCopy(term->value.sref);
+ break;
+ default:
+ BADEXIT;
+ }
ret->kind = term->kind;
return ret;
}
-constraintTerm constraintTerm_setFileloc (constraintTerm term, fileloc loc)
+constraintTerm constraintTerm_setFileloc (/*@returned@*/ constraintTerm term, fileloc loc)
{
- llassert(term);
+ llassert(term != NULL);
+
+ if ( fileloc_isDefined( term->loc ) )
+ fileloc_free(term->loc);
+
term->loc = fileloc_copy(loc);
return term;
}
-cstring constraintTerm_getName (constraintTerm term)
+static cstring constraintTerm_getName (constraintTerm term)
{
cstring s;
s = cstring_undefined;
switch (term->kind)
{
- case EXPRNODE:
- /*@i334*/ //wtf
+ case CTT_EXPR:
+
s = message ("%s", exprNode_unparse (term->value.expr) );
break;
- case INTLITERAL:
- s = message (" %d ", term->value.intlit);
+ case CTT_INTLITERAL:
+ s = message (" %d ", (int) term->value.intlit);
break;
- case SREF:
- s = message ("%s", sRef_unparse (term->value.sref) );
+ case CTT_SREF:
+ s = message ("%q", sRef_unparse (term->value.sref) );
+ break;
+ default:
+ BADEXIT;
+ /*@notreached@*/
break;
}
return s;
}
-
-constraintTerm constraintTerm_doSRefFixBaseParam (constraintTerm term, exprNodeList arglist)
+constraintTerm
+constraintTerm_doSRefFixBaseParam (/*@returned@*/constraintTerm term, exprNodeList arglist) /*@modifies term@*/
{
llassert (term != NULL);
-
+
switch (term->kind)
{
- case EXPRNODE:
- /*@i334*/ //wtf
- // s = message ("%s @ %s ", exprNode_unparse (term->value.expr),
- // fileloc_unparse (term->loc) );
+ case CTT_EXPR:
+
+ break;
+ case CTT_INTLITERAL:
break;
- case INTLITERAL:
- // s = message (" %d ", term->value.intlit);
- break;
- case SREF:
+ case CTT_SREF:
term->value.sref = sRef_fixBaseParam (term->value.sref, arglist);
- // s = message ("%s ", sRef_unparse (term->value.sref) );
-
break;
+ default:
+ BADEXIT;
}
return term;
}
-cstring constraintTerm_print (constraintTerm term)
+cstring constraintTerm_unparse (constraintTerm term) /*@*/
{
cstring s;
s = cstring_undefined;
switch (term->kind)
{
- case EXPRNODE:
- /*@i334*/ //wtf
- s = message ("%s @ %s ", exprNode_unparse (term->value.expr),
+ case CTT_EXPR:
+
+ s = message ("%s @ %q", exprNode_unparse (term->value.expr),
fileloc_unparse (term->loc) );
break;
- case INTLITERAL:
- s = message (" %d ", term->value.intlit);
+ case CTT_INTLITERAL:
+ s = message ("%d", (int)term->value.intlit);
break;
- case SREF:
- s = message ("%s ", sRef_unparseDebug (term->value.sref) );
+ case CTT_SREF:
+ s = message ("%q", sRef_unparseDebug (term->value.sref) );
break;
+ default:
+ BADEXIT;
}
return s;
}
-constraintTerm constraintTerm_makeIntLiteral (int i)
+constraintTerm constraintTerm_makeIntLiteral (long i)
{
constraintTerm ret = new_constraintTermExpr();
ret->value.intlit = i;
- ret->kind = INTLITERAL;
+ ret->kind = CTT_INTLITERAL;
ret->loc = fileloc_undefined;
return ret;
}
bool constraintTerm_canGetValue (constraintTerm term)
{
- if (term->kind == INTLITERAL)
- return TRUE;
+ if (term->kind == CTT_INTLITERAL)
+ {
+ return TRUE;
+ }
+ else if (term->kind == CTT_SREF)
+ {
+ if (sRef_hasValue (term->value.sref))
+ {
+ multiVal mval = sRef_getValue (term->value.sref);
+
+ return multiVal_isInt (mval); /* for now, only try to deal with int values */
+ }
+ else
+ {
+ return FALSE;
+ }
+ }
+ else if (term->kind == CTT_EXPR)
+ {
+ return FALSE;
+ }
else
- return FALSE;
+ {
+ return FALSE;
+ }
}
-int constraintTerm_getValue (constraintTerm term)
+long constraintTerm_getValue (constraintTerm term)
{
- llassert (term->kind == INTLITERAL);
- return term->value.intlit;
-}
+ llassert (constraintTerm_canGetValue (term));
+
+ if (term->kind == CTT_INTLITERAL)
+ {
+ return term->value.intlit;
+ }
+ else if (term->kind == CTT_SREF)
+ {
+ if (sRef_hasValue (term->value.sref))
+ {
+ multiVal mval = sRef_getValue (term->value.sref);
+ return multiVal_forceInt (mval); /* for now, only try to deal with int values */
+ }
+ else
+ {
+ BADBRANCH;
+ }
+ }
+ else if (term->kind == CTT_EXPR)
+ {
+ BADBRANCH;
+ }
+ else
+ {
+ BADBRANCH;
+ }
+ BADEXIT;
+}
-/* same and similar are similar but not the same*/
+/*drl added this 10.30.001
+ */
-bool constraintTerm_same (constraintTerm term1, constraintTerm term2)
+/*@exposed@*/ exprNode constraintTerm_getExprNode (constraintTerm t)
{
- llassert (term1 !=NULL && term2 !=NULL);
+ llassert (t != NULL);
+
+ llassert (t->kind == CTT_EXPR);
+
+ return t->value.expr;
- if ( (term1->kind != term2->kind) || (term1->kind != EXPRNODE) )
- {
- return FALSE;
- }
-
- DPRINTF ( (message
- ("Comparing srefs for %s and %s ", constraintTerm_print(term1), constraintTerm_print(term2)
- )
- )
- );
-
- if (sRef_same (term1->value.expr->sref, term2->value.expr->sref) )
- {
- DPRINTF ((message (" %s and %s are same", constraintTerm_print(term1), constraintTerm_print(term2) ) ));
- return TRUE;
- }
- else
- {
- DPRINTF ((message (" %s and %s are not same", constraintTerm_print(term1), constraintTerm_print(term2) ) ));
- return FALSE;
- }
-
}
-sRef constraintTerm_getsRef (constraintTerm t)
+ /*@exposed@*/ sRef constraintTerm_getsRef (constraintTerm t)
{
- llassert (t);
- if (t->kind == EXPRNODE)
+ llassert (t != NULL);
+ if (t->kind == CTT_EXPR)
{
- return t->value.expr->sref;
+ return exprNode_getSref(t->value.expr);
}
- if (t->kind == SREF)
+ if (t->kind == CTT_SREF)
{
return t->value.sref;
}
llassert (term1 !=NULL && term2 !=NULL);
- DPRINTF ( (message
+ DPRINTF ((message
("Comparing srefs for %s and %s ", constraintTerm_print(term1), constraintTerm_print(term2)
)
)
if (cstring_equal (s1, s2) )
{
- DPRINTF ((message (" %s and %s are same", s1, s2 ) ) );
+ DPRINTF ((message (" %q and %q are same", s1, s2 ) ) );
return TRUE;
}
else
{
- DPRINTF ((message (" %s and %s are not same", s1, s2 ) ) );
+ DPRINTF ((message (" %q and %q are not same", s1, s2 ) ) );
return FALSE;
}
}
sRef s1, s2;
llassert (term1 !=NULL && term2 !=NULL);
+
+ if (constraintTerm_canGetValue (term1) && constraintTerm_canGetValue (term2))
+
+ /*3/30/2003 comment updated to reflect name change form INTLITERAL to CTT_INTLITERAL*/
+ /* evans 2001-07-24: was (term1->kind == CTT_INTLITERAL) && (term2->kind == CTT_INTLITERAL) ) */
+ {
+ long t1, t2;
+
+ t1 = constraintTerm_getValue (term1);
+ t2 = constraintTerm_getValue (term2);
+
+ return (t1 == t2);
+ }
+
+ /*drl this if statement handles the case where constraintTerm_canGetValue only returns
+ true for term1 or term2 but no both
+ if constraintTerm_canGetValue returned tru for both we would have returned in the previous if statement
+ I suppose this could be done with xor but I've never used xor and don't feel like starting now
+ besides this way is more effecient.
+ */
+ if (constraintTerm_canGetValue (term1) || constraintTerm_canGetValue (term2))
+ {
+
+ return FALSE;
+ }
s1 = constraintTerm_getsRef (term1);
s2 = constraintTerm_getsRef (term2);
- if ( ! (s1 && s2) )
+ if (!(sRef_isValid(s1) && sRef_isValid(s2)))
{
return FALSE;
}
- DPRINTF ( (message
+ DPRINTF((message
("Comparing srefs for %s and %s ", constraintTerm_print(term1), constraintTerm_print(term2)
)
)
);
-
- if (sRef_sameName (s1, s2) )
- {
- DPRINTF ((message (" %s and %s are same", constraintTerm_print(term1), constraintTerm_print(term2) ) ));
- return TRUE;
- }
- else
- {
- DPRINTF ((message (" %s and %s are not same", constraintTerm_print(term1), constraintTerm_print(term2) ) ));
- return FALSE;
- }
-
+
+ if (sRef_similarRelaxed(s1, s2) || sRef_sameName (s1, s2) )
+ {
+ DPRINTF ((message (" %s and %s are same", constraintTerm_print(term1), constraintTerm_print(term2) ) ));
+ return TRUE;
+ }
+ else
+ {
+ DPRINTF ((message (" %s and %s are not same", constraintTerm_print(term1), constraintTerm_print(term2) ) ));
+ return FALSE;
+ }
+}
+
+void constraintTerm_dump (/*@observer@*/ constraintTerm t, FILE *f)
+{
+ fileloc loc;
+ constraintTermValue value;
+ constraintTermType kind;
+ uentry u;
+
+ loc = t->loc;
+
+ value = t->value;
+
+ kind = t->kind;
+
+ fprintf(f, "%d\n", (int) kind);
+
+ switch (kind)
+ {
+
+ case CTT_EXPR:
+ u = exprNode_getUentry(t->value.expr);
+ fprintf (f, "%s\n", cstring_toCharsSafe (uentry_rawName (u)));
+ break;
+
+ case CTT_SREF:
+ {
+ sRef s;
+
+ s = t->value.sref;
+
+ if (sRef_isResult (s ) )
+ {
+ fprintf(f, "Result\n");
+ }
+ else if (sRef_isParam (s))
+ {
+ int param;
+ ctype ct;
+ cstring ctString;
+
+
+ ct = sRef_getType (s);
+ param = sRef_getParam(s);
+
+ ctString = ctype_dump(ct);
+
+ fprintf(f, "Param %s %d\n", cstring_toCharsSafe(ctString), (int) param );
+ cstring_free(ctString);
+ }
+ else if (sRef_isField (s) )
+ {
+ fprintf(f, "sRef_dump %s\n", cstring_toCharsSafe(sRef_dump(s)) );
+ }
+ else
+ {
+ u = sRef_getUentry(s);
+ fprintf (f, "%s\n", cstring_toCharsSafe (uentry_rawName (u)));
+ }
+
+ }
+ break;
+
+ case CTT_INTLITERAL:
+ fprintf (f, "%ld\n", t->value.intlit);
+ break;
+
+ default:
+ BADEXIT;
+ }
+
+}
+
+
+/*@only@*/ constraintTerm constraintTerm_undump (FILE *f)
+{
+ constraintTermType kind;
+ constraintTerm ret;
+
+ uentry ue;
+
+ char *str;
+ char *os;
+
+ os = mstring_create (MAX_DUMP_LINE_LENGTH);
+
+ str = fgets (os, MAX_DUMP_LINE_LENGTH, f);
+
+ llassert (str != NULL);
+
+ kind = (constraintTermType) reader_getInt(&str);
+ str = fgets(os, MAX_DUMP_LINE_LENGTH, f);
+
+ llassert (str != NULL);
+
+ switch (kind)
+ {
+
+ case CTT_SREF:
+ {
+ sRef s;
+ char * term;
+ term = reader_getWord(&str);
+
+ if (term == NULL)
+ {
+ llfatalbug (message ("Library file appears to be corrupted.") );
+ }
+ if (strcmp (term, "Result") == 0 )
+ {
+ s = sRef_makeResult (ctype_unknown);
+ }
+ else if (strcmp (term, "Param" ) == 0 )
+ {
+ int param;
+ char *str2, *ostr2;
+
+ ctype t;
+
+ reader_checkChar(&str, ' ');
+ str2 = reader_getWord(&str);
+ param = reader_getInt(&str);
+
+ if (str2 == NULL)
+ {
+ llfatalbug (message ("Library file appears to be corrupted.") );
+ }
+
+ ostr2 = str2;
+ t = ctype_undump(&str2) ;
+ s = sRef_makeParam (param, t, stateInfo_makeLoc (g_currentloc, SA_CREATED));
+ free (ostr2);
+ }
+ else if (strcmp (term, "sRef_dump" ) == 0 )
+ {
+ reader_checkChar(&str, ' ');
+ s = sRef_undump (&str);
+ }
+ else /* This must be an identified that we can search for in usymTab */
+ {
+ cstring termStr = cstring_makeLiteralTemp(term);
+
+ ue = usymtab_lookup (termStr);
+ s = uentry_getSref(ue);
+ }
+
+ ret = constraintTerm_makesRef(s);
+
+ free(term);
+ }
+ break;
+
+ case CTT_EXPR:
+ {
+ sRef s;
+ char * term;
+ cstring termStr;
+
+ term = reader_getWord(&str);
+
+ if (term == NULL)
+ {
+ llfatalbug (message ("Library file appears to be corrupted.") );
+ }
+
+ /* This must be an identifier that we can search for in usymTab */
+ termStr = cstring_makeLiteralTemp(term);
+
+ ue = usymtab_lookup (termStr);
+ s = uentry_getSref(ue);
+ ret = constraintTerm_makesRef(s);
+
+ free (term);
+ }
+ break;
+
+
+ case CTT_INTLITERAL:
+ {
+ int i;
+
+ i = reader_getInt(&str);
+ ret = constraintTerm_makeIntLiteral (i);
+ }
+ break;
+
+ default:
+ BADEXIT;
+ }
+ free (os);
+
+ return ret;
}
+/* drl added sometime before 10/17/001*/
+ctype constraintTerm_getCType (constraintTerm term)
+{
+ ctype ct;
+
+ switch (term->kind)
+ {
+ case CTT_EXPR:
+ ct = exprNode_getType (term->value.expr);
+ break;
+
+ case CTT_INTLITERAL:
+ ct = ctype_signedintegral;
+ break;
+
+ case CTT_SREF:
+ ct = sRef_getType (term->value.sref) ;
+ break;
+ default:
+ BADEXIT;
+ }
+ return ct;
+}
+
+bool constraintTerm_isConstantOnly (constraintTerm term)
+{
+ switch (term->kind)
+ {
+ case CTT_EXPR:
+ if (exprNode_isNumLiteral (term->value.expr) ||
+ exprNode_isStringLiteral (term->value.expr) ||
+ exprNode_isCharLiteral (term->value.expr) )
+ {
+ return TRUE;
+ }
+ else
+ {
+ return FALSE;
+ }
+
+ case CTT_INTLITERAL:
+ return TRUE;
+
+ case CTT_SREF:
+ if ( sRef_isConst (term->value.sref) )
+ {
+ return TRUE;
+ }
+ else
+ {
+ return FALSE;
+ }
+ default:
+ BADEXIT;
+ }
+
+ BADEXIT;
+}
andersk / splint.git / blobdiff