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/*
* Copyright (C) 2017 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 "androidfw/ResourceUtils.h"
namespace android {
bool ExtractResourceName(const StringPiece& str, StringPiece* out_package, StringPiece* out_type,
StringPiece* out_entry) {
*out_package = "";
*out_type = "";
bool has_package_separator = false;
bool has_type_separator = false;
const char* start = str.data();
const char* end = start + str.size();
if (start[0] == '@') {
start++;
}
const char* current = start;
while (current != end) {
if (out_type->size() == 0 && *current == '/') {
has_type_separator = true;
out_type->assign(start, current - start);
start = current + 1;
} else if (out_package->size() == 0 && *current == ':') {
has_package_separator = true;
out_package->assign(start, current - start);
start = current + 1;
}
current++;
}
out_entry->assign(start, end - start);
return !(has_package_separator && out_package->empty()) &&
!(has_type_separator && out_type->empty());
}
base::expected<AssetManager2::ResourceName, NullOrIOError> ToResourceName(
const StringPoolRef& type_string_ref, const StringPoolRef& entry_string_ref,
const StringPiece& package_name) {
AssetManager2::ResourceName name{
.package = package_name.data(),
.package_len = package_name.size(),
};
if (base::expected<StringPiece, NullOrIOError> type_str = type_string_ref.string8();
type_str.ok()) {
name.type = type_str->data();
name.type_len = type_str->size();
} else if (UNLIKELY(IsIOError(type_str))) {
return base::unexpected(type_str.error());
}
if (name.type == nullptr) {
if (base::expected<StringPiece16, NullOrIOError> type16_str = type_string_ref.string16();
type16_str.ok()) {
name.type16 = type16_str->data();
name.type_len = type16_str->size();
} else if (!type16_str.has_value()) {
return base::unexpected(type16_str.error());
}
}
if (base::expected<StringPiece, NullOrIOError> entry_str = entry_string_ref.string8();
entry_str.ok()) {
name.entry = entry_str->data();
name.entry_len = entry_str->size();
} else if (UNLIKELY(IsIOError(entry_str))) {
return base::unexpected(entry_str.error());
}
if (name.entry == nullptr) {
if (base::expected<StringPiece16, NullOrIOError> entry16_str = entry_string_ref.string16();
entry16_str.ok()) {
name.entry16 = entry16_str->data();
name.entry_len = entry16_str->size();
} else if (!entry16_str.has_value()) {
return base::unexpected(entry16_str.error());
}
}
return name;
}
std::string ToFormattedResourceString(const AssetManager2::ResourceName& resource_name) {
std::string result;
if (resource_name.package != nullptr) {
result.append(resource_name.package, resource_name.package_len);
}
if (resource_name.type != nullptr || resource_name.type16 != nullptr) {
if (!result.empty()) {
result += ":";
}
if (resource_name.type != nullptr) {
result.append(resource_name.type, resource_name.type_len);
} else {
result += util::Utf16ToUtf8(StringPiece16(resource_name.type16, resource_name.type_len));
}
}
if (resource_name.entry != nullptr || resource_name.entry16 != nullptr) {
if (!result.empty()) {
result += "/";
}
if (resource_name.entry != nullptr) {
result.append(resource_name.entry, resource_name.entry_len);
} else {
result += util::Utf16ToUtf8(StringPiece16(resource_name.entry16, resource_name.entry_len));
}
}
return result;
}
} // namespace android
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