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MemoryOutStream.cpp
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149 lines (108 loc) · 2.71 KB
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#include "MemoryOutStream.h"
#ifndef UNITTEST_USE_CUSTOM_STREAMS
namespace UnitTest {
char const* MemoryOutStream::GetText() const
{
m_text = this->str();
return m_text.c_str();
}
}
#else
#include <cstring>
#include <cstdio>
namespace UnitTest {
namespace {
template<typename ValueType>
void FormatToStream(MemoryOutStream& stream, char const* format, ValueType const& value)
{
using namespace std;
char txt[32];
sprintf(txt, format, value);
stream << txt;
}
int RoundUpToMultipleOfPow2Number (int n, int pow2Number)
{
return (n + (pow2Number - 1)) & ~(pow2Number - 1);
}
}
MemoryOutStream::MemoryOutStream(int const size)
: m_capacity (0)
, m_buffer (0)
{
GrowBuffer(size);
}
MemoryOutStream::~MemoryOutStream()
{
delete [] m_buffer;
}
char const* MemoryOutStream::GetText() const
{
return m_buffer;
}
MemoryOutStream& MemoryOutStream::operator << (char const* txt)
{
using namespace std;
int const bytesLeft = m_capacity - (int)strlen(m_buffer);
int const bytesRequired = (int)strlen(txt) + 1;
if (bytesRequired > bytesLeft)
{
int const requiredCapacity = bytesRequired + m_capacity - bytesLeft;
GrowBuffer(requiredCapacity);
}
strcat(m_buffer, txt);
return *this;
}
MemoryOutStream& MemoryOutStream::operator << (int const n)
{
FormatToStream(*this, "%i", n);
return *this;
}
MemoryOutStream& MemoryOutStream::operator << (long const n)
{
FormatToStream(*this, "%li", n);
return *this;
}
MemoryOutStream& MemoryOutStream::operator << (unsigned long const n)
{
FormatToStream(*this, "%lu", n);
return *this;
}
MemoryOutStream& MemoryOutStream::operator << (float const f)
{
FormatToStream(*this, "%ff", f);
return *this;
}
MemoryOutStream& MemoryOutStream::operator << (void const* p)
{
FormatToStream(*this, "%p", p);
return *this;
}
MemoryOutStream& MemoryOutStream::operator << (unsigned int const s)
{
FormatToStream(*this, "%u", s);
return *this;
}
MemoryOutStream& MemoryOutStream::operator <<(double const d)
{
FormatToStream(*this, "%f", d);
return *this;
}
int MemoryOutStream::GetCapacity() const
{
return m_capacity;
}
void MemoryOutStream::GrowBuffer(int const desiredCapacity)
{
int const newCapacity = RoundUpToMultipleOfPow2Number(desiredCapacity, GROW_CHUNK_SIZE);
using namespace std;
char* buffer = new char[newCapacity];
if (m_buffer)
strcpy(buffer, m_buffer);
else
strcpy(buffer, "");
delete [] m_buffer;
m_buffer = buffer;
m_capacity = newCapacity;
}
}
#endif