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/*
* Copyright (C) 2023 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.
*/
#pragma once
#include <android/persistable_bundle.h>
#include <log/log.h>
#include <utils/String8.h>
// take a vector and put the contents into a buffer.
// return the size of the contents.
// This may not put all of the contents into the buffer if the buffer is not
// large enough.
template <typename T>
int32_t getVecInternal(const std::vector<T>& inVec, T* _Nullable buffer, int32_t bufferSizeBytes) {
LOG_ALWAYS_FATAL_IF(inVec.size() > INT32_MAX,
"The size of the APersistableBundle has gotten too large!");
LOG_ALWAYS_FATAL_IF(
bufferSizeBytes < 0,
"The buffer size in bytes can not be larger than INT32_MAX and can not be negative.");
int32_t num = inVec.size();
int32_t numAvailable = bufferSizeBytes / sizeof(T);
int32_t numFill = numAvailable < num ? numAvailable : num;
if (numFill > 0 && buffer) {
for (int32_t i = 0; i < numFill; i++) {
buffer[i] = inVec[i];
}
}
return num * sizeof(T);
}
// take a vector or a set of String16 and put the contents into a char** buffer.
// return the size of the contents.
// This may not put all of the contents into the buffer if the buffer is not
// large enough.
// The strings are duped with a user supplied callback
template <typename T>
int32_t getStringsInternal(const T& strings, char* _Nullable* _Nullable buffer,
int32_t bufferSizeBytes,
APersistableBundle_stringAllocator stringAllocator,
void* _Nullable context) {
LOG_ALWAYS_FATAL_IF(strings.size() > INT32_MAX,
"The size of the APersistableBundle has gotten too large!");
LOG_ALWAYS_FATAL_IF(
bufferSizeBytes < 0,
"The buffer size in bytes can not be larger than INT32_MAX and can not be negative.");
int32_t num = strings.size();
int32_t numAvailable = bufferSizeBytes / sizeof(char*);
int32_t numFill = numAvailable < num ? numAvailable : num;
if (!stringAllocator) {
return APERSISTABLEBUNDLE_ALLOCATOR_FAILED;
}
if (numFill > 0 && buffer) {
int32_t i = 0;
for (const auto& val : strings) {
android::String8 tmp8 = android::String8(val);
buffer[i] = stringAllocator(tmp8.bytes() + 1, context);
if (buffer[i] == nullptr) {
return APERSISTABLEBUNDLE_ALLOCATOR_FAILED;
}
strncpy(buffer[i], tmp8.c_str(), tmp8.bytes() + 1);
i++;
if (i > numFill - 1) {
// buffer is too small to keep going or this is the end of the
// set
break;
}
}
}
return num * sizeof(char*);
}
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