TYPE3

[iec.git] / src / type3_AndroidCloud / anbox-master / src / anbox / graphics / emugl / ReadBuffer.cpp

diff --git a/src/type3_AndroidCloud/anbox-master/src/anbox/graphics/emugl/ReadBuffer.cpp b/src/type3_AndroidCloud/anbox-master/src/anbox/graphics/emugl/ReadBuffer.cpp
new file mode 100644 (file)
index 0000000..d7bff7b
--- /dev/null
+++ b/src/type3_AndroidCloud/anbox-master/src/anbox/graphics/emugl/ReadBuffer.cpp
@@ -0,0 +1,69 @@
+/*
+* Copyright (C) 2011 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 "anbox/graphics/emugl/ReadBuffer.h"
+#include "anbox/logger.h"
+
+#include <assert.h>
+#include <limits.h>
+#include <string.h>
+
+ReadBuffer::ReadBuffer(size_t bufsize) {
+  m_size = bufsize;
+  m_buf = static_cast<unsigned char*>(malloc(m_size * sizeof(unsigned char)));
+  m_validData = 0;
+  m_readPtr = m_buf;
+}
+
+ReadBuffer::~ReadBuffer() { free(m_buf); }
+
+int ReadBuffer::getData(IOStream* stream) {
+  if (stream == NULL) return -1;
+  if ((m_validData > 0) && (m_readPtr > m_buf)) {
+    memmove(m_buf, m_readPtr, m_validData);
+  }
+  // get fresh data into the buffer;
+  size_t len = m_size - m_validData;
+  if (len == 0) {
+    // we need to inc our buffer
+    size_t new_size = m_size * 2;
+    unsigned char* new_buf;
+    if (new_size < m_size) {  // overflow check
+      new_size = INT_MAX;
+    }
+
+    new_buf = static_cast<unsigned char*>(realloc(m_buf, new_size));
+    if (!new_buf) {
+      ERROR("Failed to alloc %zu bytes for ReadBuffer", new_size);
+      return -1;
+    }
+    m_size = new_size;
+    m_buf = new_buf;
+    len = m_size - m_validData;
+  }
+  m_readPtr = m_buf;
+  if (NULL != stream->read(m_buf + m_validData, &len)) {
+    m_validData += len;
+    return len;
+  }
+  return -1;
+}
+
+void ReadBuffer::consume(size_t amount) {
+  assert(amount <= m_validData);
+  m_validData -= amount;
+  m_readPtr += amount;
+}