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/*
* Copyright (C) 2009 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 "rsContext.h"
#include "rsStream.h"
using namespace android;
using namespace android::renderscript;
IStream::IStream(const uint8_t *buf, bool use64) {
mData = buf;
mPos = 0;
mUse64 = use64;
}
void IStream::loadByteArray(void *dest, size_t numBytes) {
memcpy(dest, mData + mPos, numBytes);
mPos += numBytes;
}
uint64_t IStream::loadOffset() {
uint64_t tmp;
if (mUse64) {
mPos = (mPos + 7) & (~7);
tmp = reinterpret_cast<const uint64_t *>(&mData[mPos])[0];
mPos += sizeof(uint64_t);
return tmp;
}
return loadU32();
}
void IStream::loadString(String8 *s) {
uint32_t len = loadU32();
s->setTo((const char *)&mData[mPos], len);
mPos += len;
}
// Output stream implementation
OStream::OStream(uint64_t len, bool use64) {
mData = (uint8_t*)malloc(len);
mLength = len;
mPos = 0;
mUse64 = use64;
}
OStream::~OStream() {
free(mData);
}
void OStream::addByteArray(const void *src, size_t numBytes) {
// We need to potentially grow more than once if the number of byes we write is substantial
while (mPos + numBytes >= mLength) {
growSize();
}
memcpy(mData + mPos, src, numBytes);
mPos += numBytes;
}
void OStream::addOffset(uint64_t v) {
if (mUse64) {
mPos = (mPos + 7) & (~7);
if (mPos + sizeof(v) >= mLength) {
growSize();
}
mData[mPos++] = (uint8_t)(v & 0xff);
mData[mPos++] = (uint8_t)((v >> 8) & 0xff);
mData[mPos++] = (uint8_t)((v >> 16) & 0xff);
mData[mPos++] = (uint8_t)((v >> 24) & 0xff);
mData[mPos++] = (uint8_t)((v >> 32) & 0xff);
mData[mPos++] = (uint8_t)((v >> 40) & 0xff);
mData[mPos++] = (uint8_t)((v >> 48) & 0xff);
mData[mPos++] = (uint8_t)((v >> 56) & 0xff);
} else {
addU32(v);
}
}
void OStream::addString(String8 *s) {
uint32_t len = s->size();
addU32(len);
if (mPos + len*sizeof(char) >= mLength) {
growSize();
}
char *stringData = reinterpret_cast<char *>(&mData[mPos]);
for (uint32_t i = 0; i < len; i ++) {
stringData[i] = s->string()[i];
}
mPos += len*sizeof(char);
}
void OStream::growSize() {
uint8_t *newData = (uint8_t*)malloc(mLength*2);
memcpy(newData, mData, mLength*sizeof(uint8_t));
mLength = mLength * 2;
free(mData);
mData = newData;
}
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