1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "ResourceTable.h"
18
19#include "compile/IdAssigner.h"
20#include "process/IResourceTableConsumer.h"
21#include "util/Util.h"
22
23#include <bitset>
24#include <cassert>
25#include <set>
26
27namespace aapt {
28
29bool IdAssigner::consume(IAaptContext* context, ResourceTable* table) {
30    std::bitset<256> usedTypeIds;
31    std::set<uint16_t> usedEntryIds;
32
33    for (auto& package : table->packages) {
34        assert(package->id && "packages must have manually assigned IDs");
35
36        usedTypeIds.reset();
37
38        // Type ID 0 is invalid, reserve it.
39        usedTypeIds.set(0);
40
41        // Collect used type IDs.
42        for (auto& type : package->types) {
43            if (type->id) {
44                usedEntryIds.clear();
45
46                if (usedTypeIds[type->id.value()]) {
47                    // This ID is already taken!
48                    context->getDiagnostics()->error(DiagMessage()
49                                                     << "type '" << type->type << "' in "
50                                                     << "package '" << package->name << "' has "
51                                                     << "duplicate ID "
52                                                     << std::hex << (int) type->id.value()
53                                                     << std::dec);
54                    return false;
55                }
56
57                // Mark the type ID as taken.
58                usedTypeIds.set(type->id.value());
59            }
60
61            // Collect used entry IDs.
62            for (auto& entry : type->entries) {
63                if (entry->id) {
64                    // Mark entry ID as taken.
65                    if (!usedEntryIds.insert(entry->id.value()).second) {
66                        // This ID existed before!
67                        ResourceNameRef nameRef(package->name, type->type, entry->name);
68                        context->getDiagnostics()->error(DiagMessage()
69                                                         << "resource '" << nameRef << "' "
70                                                         << "has duplicate entry ID "
71                                                         << std::hex << (int) entry->id.value()
72                                                         << std::dec);
73                        return false;
74                    }
75                }
76            }
77
78            // Assign unused entry IDs.
79            const auto endUsedEntryIter = usedEntryIds.end();
80            auto nextUsedEntryIter = usedEntryIds.begin();
81            uint16_t nextId = 0;
82            for (auto& entry : type->entries) {
83                if (!entry->id) {
84                    // Assign the next available entryID.
85                    while (nextUsedEntryIter != endUsedEntryIter &&
86                            nextId == *nextUsedEntryIter) {
87                        nextId++;
88                        ++nextUsedEntryIter;
89                    }
90                    entry->id = nextId++;
91                }
92            }
93        }
94
95        // Assign unused type IDs.
96        size_t nextTypeId = 0;
97        for (auto& type : package->types) {
98            if (!type->id) {
99                while (nextTypeId < usedTypeIds.size() && usedTypeIds[nextTypeId]) {
100                    nextTypeId++;
101                }
102                type->id = static_cast<uint8_t>(nextTypeId);
103                nextTypeId++;
104            }
105        }
106    }
107    return true;
108}
109
110} // namespace aapt
111