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+/****************************************************************************\
+Copyright (c) 2002, NVIDIA Corporation.
+
+NVIDIA Corporation("NVIDIA") supplies this software to you in
+consideration of your agreement to the following terms, and your use,
+installation, modification or redistribution of this NVIDIA software
+constitutes acceptance of these terms. If you do not agree with these
+terms, please do not use, install, modify or redistribute this NVIDIA
+software.
+
+In consideration of your agreement to abide by the following terms, and
+subject to these terms, NVIDIA grants you a personal, non-exclusive
+license, under NVIDIA's copyrights in this original NVIDIA software (the
+"NVIDIA Software"), to use, reproduce, modify and redistribute the
+NVIDIA Software, with or without modifications, in source and/or binary
+forms; provided that if you redistribute the NVIDIA Software, you must
+retain the copyright notice of NVIDIA, this notice and the following
+text and disclaimers in all such redistributions of the NVIDIA Software.
+Neither the name, trademarks, service marks nor logos of NVIDIA
+Corporation may be used to endorse or promote products derived from the
+NVIDIA Software without specific prior written permission from NVIDIA.
+Except as expressly stated in this notice, no other rights or licenses
+express or implied, are granted by NVIDIA herein, including but not
+limited to any patent rights that may be infringed by your derivative
+works or by other works in which the NVIDIA Software may be
+incorporated. No hardware is licensed hereunder.
+
+THE NVIDIA SOFTWARE IS BEING PROVIDED ON AN "AS IS" BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED,
+INCLUDING WITHOUT LIMITATION, WARRANTIES OR CONDITIONS OF TITLE,
+NON-INFRINGEMENT, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+ITS USE AND OPERATION EITHER ALONE OR IN COMBINATION WITH OTHER
+PRODUCTS.
+
+IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT,
+INCIDENTAL, EXEMPLARY, CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, LOST PROFITS; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) OR ARISING IN ANY WAY
+OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE
+NVIDIA SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT,
+TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF
+NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+\****************************************************************************/
+//
+// symbols.c
+//
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "compiler/preprocessor/slglobals.h"
+
+#if defined(_MSC_VER)
+#pragma warning(disable: 4706)
+#endif
+
+///////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////// Symbol Table Variables: ///////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////////////////////
+
+Scope *ScopeList = NULL;
+Scope *CurrentScope = NULL;
+Scope *GlobalScope = NULL;
+
+static void unlinkScope(void *_scope) {
+ Scope *scope = _scope;
+
+ if (scope->next)
+ scope->next->prev = scope->prev;
+ if (scope->prev)
+ scope->prev->next = scope->next;
+ else
+ ScopeList = scope->next;
+}
+
+/*
+ * NewScope()
+ *
+ */
+Scope *NewScopeInPool(MemoryPool *pool)
+{
+ Scope *lScope;
+
+ lScope = mem_Alloc(pool, sizeof(Scope));
+ lScope->pool = pool;
+ lScope->parent = NULL;
+ lScope->funScope = NULL;
+ lScope->symbols = NULL;
+
+ lScope->level = 0;
+
+ lScope->programs = NULL;
+ if ((lScope->next = ScopeList))
+ ScopeList->prev = lScope;
+ lScope->prev = 0;
+ ScopeList = lScope;
+ mem_AddCleanup(pool, unlinkScope, lScope);
+ return lScope;
+} // NewScope
+
+/*
+ * PushScope()
+ *
+ */
+
+void PushScope(Scope *fScope)
+{
+ Scope *lScope;
+
+ if (CurrentScope) {
+ fScope->level = CurrentScope->level + 1;
+ if (fScope->level == 1) {
+ if (!GlobalScope) {
+ /* HACK - CTD -- if GlobalScope==NULL and level==1, we're
+ * defining a function in the superglobal scope. Things
+ * will break if we leave the level as 1, so we arbitrarily
+ * set it to 2 */
+ fScope->level = 2;
+ }
+ }
+ if (fScope->level >= 2) {
+ lScope = fScope;
+ while (lScope->level > 2)
+ lScope = lScope->next;
+ fScope->funScope = lScope;
+ }
+ } else {
+ fScope->level = 0;
+ }
+ fScope->parent = CurrentScope;
+ CurrentScope = fScope;
+} // PushScope
+
+/*
+ * PopScope()
+ *
+ */
+
+Scope *PopScope(void)
+{
+ Scope *lScope;
+
+ lScope = CurrentScope;
+ if (CurrentScope)
+ CurrentScope = CurrentScope->parent;
+ return lScope;
+} // PopScope
+
+/*
+ * NewSymbol() - Allocate a new symbol node;
+ *
+ */
+
+Symbol *NewSymbol(SourceLoc *loc, Scope *fScope, int name, symbolkind kind)
+{
+ Symbol *lSymb;
+ char *pch;
+ unsigned int ii;
+
+ lSymb = (Symbol *) mem_Alloc(fScope->pool, sizeof(Symbol));
+ lSymb->left = NULL;
+ lSymb->right = NULL;
+ lSymb->next = NULL;
+ lSymb->name = name;
+ lSymb->loc = *loc;
+ lSymb->kind = kind;
+
+ // Clear union area:
+
+ pch = (char *) &lSymb->details;
+ for (ii = 0; ii < sizeof(lSymb->details); ii++)
+ *pch++ = 0;
+ return lSymb;
+} // NewSymbol
+
+/*
+ * lAddToTree() - Using a binary tree is not a good idea for basic atom values because they
+ * are generated in order. We'll fix this later (by reversing the bit pattern).
+ */
+
+static void lAddToTree(Symbol **fSymbols, Symbol *fSymb)
+{
+ Symbol *lSymb;
+ int lrev, frev;
+
+ lSymb = *fSymbols;
+ if (lSymb) {
+ frev = GetReversedAtom(atable, fSymb->name);
+ while (lSymb) {
+ lrev = GetReversedAtom(atable, lSymb->name);
+ if (lrev == frev) {
+ CPPErrorToInfoLog("GetAtomString(atable, fSymb->name)");
+ break;
+ } else {
+ if (lrev > frev) {
+ if (lSymb->left) {
+ lSymb = lSymb->left;
+ } else {
+ lSymb->left = fSymb;
+ break;
+ }
+ } else {
+ if (lSymb->right) {
+ lSymb = lSymb->right;
+ } else {
+ lSymb->right = fSymb;
+ break;
+ }
+ }
+ }
+ }
+ } else {
+ *fSymbols = fSymb;
+ }
+} // lAddToTree
+
+
+/*
+ * AddSymbol() - Add a variable, type, or function name to a scope.
+ *
+ */
+
+Symbol *AddSymbol(SourceLoc *loc, Scope *fScope, int atom, symbolkind kind)
+{
+ Symbol *lSymb;
+
+ if (!fScope)
+ fScope = CurrentScope;
+ lSymb = NewSymbol(loc, fScope, atom, kind);
+ lAddToTree(&fScope->symbols, lSymb);
+ return lSymb;
+} // AddSymbol
+
+
+/*********************************************************************************************/
+/************************************ Symbol Semantic Functions ******************************/
+/*********************************************************************************************/
+
+/*
+ * LookUpLocalSymbol()
+ *
+ */
+
+Symbol *LookUpLocalSymbol(Scope *fScope, int atom)
+{
+ Symbol *lSymb;
+ int rname, ratom;
+
+ ratom = GetReversedAtom(atable, atom);
+ if (!fScope)
+ fScope = CurrentScope;
+ lSymb = fScope->symbols;
+ while (lSymb) {
+ rname = GetReversedAtom(atable, lSymb->name);
+ if (rname == ratom) {
+ return lSymb;
+ } else {
+ if (rname > ratom) {
+ lSymb = lSymb->left;
+ } else {
+ lSymb = lSymb->right;
+ }
+ }
+ }
+ return NULL;
+} // LookUpLocalSymbol
+
+/*
+ * LookUpSymbol()
+ *
+ */
+
+Symbol *LookUpSymbol(Scope *fScope, int atom)
+{
+ Symbol *lSymb;
+
+ if (!fScope)
+ fScope = CurrentScope;
+ while (fScope) {
+ lSymb = LookUpLocalSymbol(fScope, atom);
+ if (lSymb)
+ return lSymb;
+ fScope = fScope->parent;
+ }
+ return NULL;
+} // LookUpSymbol
+
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