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Merge "opengles emulator: dynamicaly grow ReadBuffer"

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This commit is contained in:
David Turner
2011-08-09 08:26:50 -07:00
committed by Android Code Review
parent 321714abd2 6208854726
commit a0045f2078
1 changed files with 23 additions and 4 deletions
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27
tools/emulator/opengl/host/libs/libOpenglRender/ReadBuffer.cpp
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@@ -16,29 +16,48 @@
#include "ReadBuffer.h"
#include <string.h>
#include <assert.h>
#include <limits.h>
#include "ErrorLog.h"
ReadBuffer::ReadBuffer(IOStream *stream, size_t bufsize)
{
m_size = bufsize;
m_stream = stream;
m_buf = new unsigned char[m_size];
m_buf = (unsigned char*)malloc(m_size*sizeof(unsigned char));
m_validData = 0;
m_readPtr = m_buf;
}
ReadBuffer::~ReadBuffer()
{
delete m_buf;
free(m_buf);
}
int ReadBuffer::getData()
{
if (m_validData > 0) {
if ((m_validData > 0) && (m_readPtr > m_buf)) {
memcpy(m_buf, m_readPtr, m_validData);
}
m_readPtr = m_buf;
// 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 = (unsigned char*)realloc(m_buf, new_size);
if (!new_buf) {
ERR("Failed to alloc %d bytes for ReadBuffer\n", new_size);
return -1;
}
m_size = new_size;
m_buf = new_buf;
len = m_size - m_validData;
}
m_readPtr = m_buf;
if (NULL != m_stream->read(m_buf + m_validData, &len)) {
m_validData += len;
return len;