1 files changed, 131 insertions, 0 deletions
diff --git a/libs/rs/rsStream.cpp b/libs/rs/rsStream.cpp
new file mode 100644
index 0000000..68241fa
--- /dev/null
+++ b/libs/rs/rsStream.cpp
@@ -0,0 +1,131 @@
+
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_RS_BUILD_FOR_HOST
+#include "rsContext.h"
+#else
+#include "rsContextHostStub.h"
+#endif
+
+#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;
+}
+
+