Hash :
bcfba4c3
Author :
Date :
2010-08-09T22:30:49
Fix warnings about comparison/assignement between signed and unsigned types. Submitted by timeless. BUG=13 Review URL: http://codereview.appspot.com/1895051 git-svn-id: https://angleproject.googlecode.com/svn/trunk@378 736b8ea6-26fd-11df-bfd4-992fa37f6226
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/****************************************************************************\
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//
// symbols.c
//
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "compiler/preprocessor/slglobals.h"
///////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////// 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