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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "stream.h"
#include <algorithm>
#include <stdio.h>
namespace vespamalloc {
asciistream::asciistream() :
_rPos(0),
_wPos(0),
_buffer(static_cast<char *>(malloc(1024))),
_sz(1024)
{
}
asciistream::~asciistream()
{
free(_buffer);
_buffer = nullptr;
}
asciistream::asciistream(const asciistream & rhs) :
_rPos(0),
_wPos(rhs._wPos - rhs._rPos),
_buffer(static_cast<char *>(malloc(_wPos+1))),
_sz(_wPos)
{
memcpy(_buffer, (rhs._buffer + rhs._rPos), _sz);
_buffer[_wPos] = 0;
}
asciistream & asciistream::operator = (const asciistream & rhs)
{
if (this != &rhs) {
asciistream newStream(rhs);
swap(newStream);
}
return *this;
}
void asciistream::swap(asciistream & rhs)
{
std::swap(_rPos, rhs._rPos);
std::swap(_wPos, rhs._wPos);
std::swap(_buffer, rhs._buffer);
std::swap(_sz, rhs._sz);
}
asciistream & asciistream::operator << (int32_t v)
{
char tmp[16];
int len = snprintf(tmp, sizeof(tmp), "%d", v);
write(tmp, len);
return *this;
}
asciistream & asciistream::operator << (uint32_t v)
{
char tmp[16];
int len = snprintf(tmp, sizeof(tmp), "%u", v);
write(tmp, len);
return *this;
}
asciistream & asciistream::operator << (int64_t v)
{
char tmp[32];
int len = snprintf(tmp, sizeof(tmp), "%ld", v);
write(tmp, len);
return *this;
}
asciistream & asciistream::operator << (uint64_t v)
{
char tmp[32];
int len = snprintf(tmp, sizeof(tmp), "%lu", v);
write(tmp, len);
return *this;
}
asciistream & asciistream::operator << (float v)
{
char tmp[64];
int len = snprintf(tmp, sizeof(tmp), "%g", v);
write(tmp, len);
return *this;
}
asciistream & asciistream::operator << (double v)
{
char tmp[64];
int len = snprintf(tmp, sizeof(tmp), "%g", v);
write(tmp, len);
return *this;
}
void asciistream::write(const void * buf, size_t len)
{
if (_rPos == _wPos) {
_rPos = _wPos = 0;
}
if ((_sz - _wPos) < len + 1) {
_buffer = static_cast<char *>(realloc(_buffer, _sz * 2 + len));
_sz = _sz * 2 + len + 1;
}
memcpy(_buffer + _wPos, buf, len);
_wPos += len;
_buffer[_wPos] = 0;
}
size_t asciistream::read(void * buf, size_t len)
{
size_t available = _wPos - _rPos;
size_t toRead(std::min(len, available));
memcpy(buf, _buffer+_rPos, toRead);
_rPos += toRead;
return toRead;
}
}
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