network_ydxlib/log_stream.cpp at master · crspecter/network_ydxlib · GitHub

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#include "log_stream.h"
#include <algorithm>
#include <limits>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_arithmetic.hpp>
#include <assert.h>
namespace ydx
{
const char digits[] = "9876543210123456789";
const char* zero = digits + 9;
BOOST_STATIC_ASSERT(sizeof(digits) == 20);

const char digitsHex[] = "0123456789ABCDEF";
BOOST_STATIC_ASSERT(sizeof digitsHex == 17);

// Efficient Integer to String Conversions, by Matthew Wilson.
template<typename T>
size_t convert(char buf[], T value)
{
  T i = value;
  char* p = buf;

  do
  {
    int lsd = static_cast<int>(i % 10);
    i /= 10;
    *p++ = zero[lsd];
  } while (i != 0);

  if (value < 0)
  {
    *p++ = '-';
  }
  *p = '\0';
  std::reverse(buf, p);

  return p - buf;
}

size_t convertHex(char buf[], uintptr_t value)
{
  uintptr_t i = value;
  char* p = buf;

  do
  {
    int lsd = static_cast<int>(i % 16);
    i /= 16;
    *p++ = digitsHex[lsd];
  } while (i != 0);

  *p = '\0';
  std::reverse(buf, p);

  return p - buf;
}

}


using namespace ydx;

template<typename T>
void LogStream::formatInteger(T v)
{
  if (buffer_.avail() >= kMaxNumericSize)
  {
    size_t len = convert(buffer_.current(), v);
    buffer_.add(len);
  }
}

//ÊµÏÖÊý×ÖÀàÐÍµÄÊäÈë

LogStream& LogStream::operator<<(short v)
{
  *this << static_cast<int>(v);
  return *this;
}

LogStream& LogStream::operator<<(unsigned short v)
{
  *this << static_cast<unsigned int>(v);
  return *this;
}

LogStream& LogStream::operator<<(int v)
{
  formatInteger(v);
  return *this;
}

LogStream& LogStream::operator<<(unsigned int v)
{
  formatInteger(v);
  return *this;
}

LogStream& LogStream::operator<<(long v)
{
  formatInteger(v);
  return *this;
}

LogStream& LogStream::operator<<(unsigned long long v)
{
  formatInteger(v);
  return *this;
}

LogStream& LogStream::operator<<(const void* p)
{
  uintptr_t v = reinterpret_cast<uintptr_t>(p);
  if (buffer_.avail() >= kMaxNumericSize)
  {
    char* buf = buffer_.current();
    buf[0] = '0';
    buf[1] = 'x';
    size_t len = convertHex(buf+2, v);
    buffer_.add(len+2);
  }
  return *this;
}

inline LogStream& operator<<(LogStream& s, const Fmt& fmt)
{
  s.append(fmt.data(), fmt.length());
  return s;
}


template<typename T>
Fmt::Fmt(const char* fmt, T val)
{
  BOOST_STATIC_ASSERT(boost::is_arithmetic<T>::value == true);

  length_ = snprintf(buf_, sizeof buf_, fmt, val);
  assert(static_cast<size_t>(length_) < sizeof buf_);
}
/*
template Fmt::Fmt(const char* fmt, char);

template Fmt::Fmt(const char* fmt, short);
template Fmt::Fmt(const char* fmt, unsigned short);
template Fmt::Fmt(const char* fmt, int);
template Fmt::Fmt(const char* fmt, unsigned int);
template Fmt::Fmt(const char* fmt, long);
template Fmt::Fmt(const char* fmt, unsigned long);
template Fmt::Fmt(const char* fmt, long long);
template Fmt::Fmt(const char* fmt, unsigned long long);

template Fmt::Fmt(const char* fmt, float);
template Fmt::Fmt(const char* fmt, double);
*/