blob: b0a2a56e08d6841a76ff683fcc4062bd1fd59b37 [file] [log] [blame]
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "src/sksl/ir/SkSLSymbolTable.h"
#include "src/sksl/ir/SkSLUnresolvedFunction.h"
namespace SkSL {
std::vector<const FunctionDeclaration*> SymbolTable::GetFunctions(const Symbol& s) {
switch (s.fKind) {
case Symbol::kFunctionDeclaration_Kind:
return { &((FunctionDeclaration&) s) };
case Symbol::kUnresolvedFunction_Kind:
return ((UnresolvedFunction&) s).fFunctions;
default:
return std::vector<const FunctionDeclaration*>();
}
}
const Symbol* SymbolTable::operator[](StringFragment name) {
const auto& entry = fSymbols.find(name);
if (entry == fSymbols.end()) {
if (fParent) {
return (*fParent)[name];
}
return nullptr;
}
if (fParent) {
auto functions = GetFunctions(*entry->second);
if (functions.size() > 0) {
bool modified = false;
const Symbol* previous = (*fParent)[name];
if (previous) {
auto previousFunctions = GetFunctions(*previous);
for (const FunctionDeclaration* prev : previousFunctions) {
bool found = false;
for (const FunctionDeclaration* current : functions) {
if (current->matches(*prev)) {
found = true;
break;
}
}
if (!found) {
functions.push_back(prev);
modified = true;
}
}
if (modified) {
SkASSERT(functions.size() > 1);
return this->takeOwnership(std::unique_ptr<Symbol>(
new UnresolvedFunction(functions)));
}
}
}
}
return entry->second;
}
Symbol* SymbolTable::takeOwnership(std::unique_ptr<Symbol> s) {
Symbol* result = s.get();
fOwnedSymbols.push_back(std::move(s));
return result;
}
IRNode* SymbolTable::takeOwnership(std::unique_ptr<IRNode> n) {
IRNode* result = n.get();
fOwnedNodes.push_back(std::move(n));
return result;
}
String* SymbolTable::takeOwnership(std::unique_ptr<String> n) {
String* result = n.get();
fOwnedStrings.push_back(std::move(n));
return result;
}
void SymbolTable::add(StringFragment name, std::unique_ptr<Symbol> symbol) {
this->addWithoutOwnership(name, symbol.get());
this->takeOwnership(std::move(symbol));
}
void SymbolTable::addWithoutOwnership(StringFragment name, const Symbol* symbol) {
const auto& existing = fSymbols.find(name);
if (existing == fSymbols.end()) {
fSymbols[name] = symbol;
} else if (symbol->fKind == Symbol::kFunctionDeclaration_Kind) {
const Symbol* oldSymbol = existing->second;
if (oldSymbol->fKind == Symbol::kFunctionDeclaration_Kind) {
std::vector<const FunctionDeclaration*> functions;
functions.push_back((const FunctionDeclaration*) oldSymbol);
functions.push_back((const FunctionDeclaration*) symbol);
std::unique_ptr<Symbol> u = std::unique_ptr<Symbol>(new UnresolvedFunction(std::move(
functions)));
fSymbols[name] = this->takeOwnership(std::move(u));
} else if (oldSymbol->fKind == Symbol::kUnresolvedFunction_Kind) {
std::vector<const FunctionDeclaration*> functions;
for (const auto* f : ((UnresolvedFunction&) *oldSymbol).fFunctions) {
functions.push_back(f);
}
functions.push_back((const FunctionDeclaration*) symbol);
std::unique_ptr<Symbol> u = std::unique_ptr<Symbol>(new UnresolvedFunction(std::move(
functions)));
fSymbols[name] = this->takeOwnership(std::move(u));
}
} else {
fErrorReporter.error(symbol->fOffset, "symbol '" + name + "' was already defined");
}
}
void SymbolTable::markAllFunctionsBuiltin() {
for (const auto& pair : fSymbols) {
switch (pair.second->fKind) {
case Symbol::kFunctionDeclaration_Kind:
((FunctionDeclaration&)*pair.second).fBuiltin = true;
break;
case Symbol::kUnresolvedFunction_Kind:
for (auto& f : ((UnresolvedFunction&) *pair.second).fFunctions) {
((FunctionDeclaration*)f)->fBuiltin = true;
}
break;
default:
break;
}
}
}
std::unordered_map<StringFragment, const Symbol*>::iterator SymbolTable::begin() {
return fSymbols.begin();
}
std::unordered_map<StringFragment, const Symbol*>::iterator SymbolTable::end() {
return fSymbols.end();
}
} // namespace