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117 lines
3.0 KiB
117 lines
3.0 KiB
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/*
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* Copyright (C) 2009 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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#include "rsContext.h"
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#include "rsStream.h"
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namespace android {
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namespace renderscript {
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IStream::IStream(const uint8_t *buf, bool use64) {
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mData = buf;
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mPos = 0;
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mUse64 = use64;
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}
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void IStream::loadByteArray(void *dest, size_t numBytes) {
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memcpy(dest, mData + mPos, numBytes);
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mPos += numBytes;
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}
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uint64_t IStream::loadOffset() {
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uint64_t tmp;
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if (mUse64) {
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mPos = (mPos + 7) & (~7);
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tmp = reinterpret_cast<const uint64_t *>(&mData[mPos])[0];
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mPos += sizeof(uint64_t);
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return tmp;
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}
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return loadU32();
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}
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const char * IStream::loadString() {
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uint32_t len = loadU32();
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const char *s = rsuCopyString((const char *)&mData[mPos], len);
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mPos += len;
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return s;
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}
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// Output stream implementation
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OStream::OStream(uint64_t len, bool use64) {
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mData = (uint8_t*)malloc(len);
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mLength = len;
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mPos = 0;
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mUse64 = use64;
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}
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OStream::~OStream() {
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free(mData);
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}
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void OStream::addByteArray(const void *src, size_t numBytes) {
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// We need to potentially grow more than once if the number of byes we write is substantial
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while (mPos + numBytes >= mLength) {
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growSize();
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}
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memcpy(mData + mPos, src, numBytes);
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mPos += numBytes;
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}
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void OStream::addOffset(uint64_t v) {
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if (mUse64) {
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mPos = (mPos + 7) & (~7);
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if (mPos + sizeof(v) >= mLength) {
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growSize();
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}
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mData[mPos++] = (uint8_t)(v & 0xff);
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mData[mPos++] = (uint8_t)((v >> 8) & 0xff);
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mData[mPos++] = (uint8_t)((v >> 16) & 0xff);
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mData[mPos++] = (uint8_t)((v >> 24) & 0xff);
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mData[mPos++] = (uint8_t)((v >> 32) & 0xff);
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mData[mPos++] = (uint8_t)((v >> 40) & 0xff);
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mData[mPos++] = (uint8_t)((v >> 48) & 0xff);
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mData[mPos++] = (uint8_t)((v >> 56) & 0xff);
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} else {
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addU32(v);
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}
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}
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void OStream::addString(const char *s, size_t len) {
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addU32(len);
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if (mPos + len*sizeof(char) >= mLength) {
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growSize();
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}
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char *stringData = reinterpret_cast<char *>(&mData[mPos]);
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memcpy(stringData, s, len);
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mPos += len*sizeof(char);
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}
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void OStream::addString(const char *s) {
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addString(s, strlen(s));
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}
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void OStream::growSize() {
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uint8_t *newData = (uint8_t*)malloc(mLength*2);
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memcpy(newData, mData, mLength*sizeof(uint8_t));
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mLength = mLength * 2;
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free(mData);
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mData = newData;
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}
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} // namespace renderscript
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} // namespace android
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