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/*
* Copyright (C) 2018 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 <cstdint>
#include <cstdio>
#include <cstdlib>
class IOStream {
public:
IOStream(unsigned char* buf, size_t bufSize) : m_buf(buf), m_bufSize(bufSize) {
}
unsigned char* alloc(size_t len) {
if (m_allocSize + len > m_bufSize) {
printf("Command response is too large.\n");
return nullptr;
}
unsigned char* buf = m_buf + m_allocSize;
m_allocSize += len;
return buf;
}
int flush() {
m_flushSize = m_allocSize;
return 0;
}
void* getDmaForReading(uint64_t guest_paddr) {
// GLDMA is not supported, so we don't have to implement this. Just keep
// a stub here to keep the generated decoder stubs happy
return nullptr;
}
void unlockDma(uint64_t guest_paddr) {
// GLDMA is not supported, so we don't have to implement this. Just keep
// a stub here to keep the generated decoder stubs happy
}
size_t getFlushSize() {
return m_flushSize;
}
private:
size_t m_allocSize = 0U;
size_t m_flushSize = 0U;
unsigned char* m_buf;
size_t m_bufSize;
};
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