1 files changed, 112 insertions, 0 deletions
diff --git a/tools/aapt2/compile/IdAssigner.cpp b/tools/aapt2/compile/IdAssigner.cpp
new file mode 100644
index 000000000000..80c6bbc1abca
--- /dev/null
+++ b/tools/aapt2/compile/IdAssigner.cpp
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "ResourceTable.h"
+
+#include "compile/IdAssigner.h"
+#include "process/IResourceTableConsumer.h"
+#include "util/Util.h"
+
+#include <bitset>
+#include <cassert>
+#include <set>
+
+namespace aapt {
+
+bool IdAssigner::consume(IAaptContext* context, ResourceTable* table) {
+    std::bitset<256> usedTypeIds;
+    std::set<uint16_t> usedEntryIds;
+
+    for (auto& package : table->packages) {
+        assert(package->id && "packages must have manually assigned IDs");
+
+        usedTypeIds.reset();
+
+        // Type ID 0 is invalid, reserve it.
+        usedTypeIds.set(0);
+
+        // Collect used type IDs.
+        for (auto& type : package->types) {
+            if (type->id) {
+                usedEntryIds.clear();
+
+                if (usedTypeIds[type->id.value()]) {
+                    // This ID is already taken!
+                    context->getDiagnostics()->error(DiagMessage()
+                                                     << "type '" << type->type << "' in "
+                                                     << "package '" << package->name << "' has "
+                                                     << "duplicate ID "
+                                                     << std::hex << (int) type->id.value()
+                                                     << std::dec);
+                    return false;
+                }
+
+                // Mark the type ID as taken.
+                usedTypeIds.set(type->id.value());
+            }
+
+            // Collect used entry IDs.
+            for (auto& entry : type->entries) {
+                if (entry->id) {
+                    // Mark entry ID as taken.
+                    if (!usedEntryIds.insert(entry->id.value()).second) {
+                        // This ID existed before!
+                        ResourceNameRef nameRef =
+                                { package->name, type->type, entry->name };
+                        ResourceId takenId(package->id.value(), type->id.value(),
+                                           entry->id.value());
+                        context->getDiagnostics()->error(DiagMessage()
+                                                         << "resource '" << nameRef << "' "
+                                                         << "has duplicate ID '"
+                                                         << takenId << "'");
+                        return false;
+                    }
+                }
+            }
+
+            // Assign unused entry IDs.
+            const auto endUsedEntryIter = usedEntryIds.end();
+            auto nextUsedEntryIter = usedEntryIds.begin();
+            uint16_t nextId = 0;
+            for (auto& entry : type->entries) {
+                if (!entry->id) {
+                    // Assign the next available entryID.
+                    while (nextUsedEntryIter != endUsedEntryIter &&
+                            nextId == *nextUsedEntryIter) {
+                        nextId++;
+                        ++nextUsedEntryIter;
+                    }
+                    entry->id = nextId++;
+                }
+            }
+        }
+
+        // Assign unused type IDs.
+        size_t nextTypeId = 0;
+        for (auto& type : package->types) {
+            if (!type->id) {
+                while (nextTypeId < usedTypeIds.size() && usedTypeIds[nextTypeId]) {
+                    nextTypeId++;
+                }
+                type->id = static_cast<uint8_t>(nextTypeId);
+                nextTypeId++;
+            }
+        }
+    }
+    return true;
+}
+
+} // namespace aapt