64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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class IOStream {
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public:
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IOStream(unsigned char* buf, size_t bufSize) : m_buf(buf), m_bufSize(bufSize) {
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}
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unsigned char* alloc(size_t len) {
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if (m_allocSize + len > m_bufSize) {
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printf("Command response is too large.\n");
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return nullptr;
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}
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unsigned char* buf = m_buf + m_allocSize;
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m_allocSize += len;
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return buf;
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}
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int flush() {
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m_flushSize = m_allocSize;
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return 0;
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}
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void* getDmaForReading(uint64_t guest_paddr) {
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// GLDMA is not supported, so we don't have to implement this. Just keep
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// a stub here to keep the generated decoder stubs happy
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return nullptr;
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}
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void unlockDma(uint64_t guest_paddr) {
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// GLDMA is not supported, so we don't have to implement this. Just keep
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// a stub here to keep the generated decoder stubs happy
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}
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size_t getFlushSize() {
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return m_flushSize;
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}
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private:
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size_t m_allocSize = 0U;
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size_t m_flushSize = 0U;
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unsigned char* m_buf;
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size_t m_bufSize;
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};
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