fmt/ostream.cc

/*
 Formatting library for C++ - std::ostream support

 Copyright (c) 2012 - 2016, Victor Zverovich
 All rights reserved.

 For the license information refer to format.h.
 */

#include "fmt/ostream.h"
#include "fmt/printf.h"

namespace fmt {

namespace {
// Write the content of w to os.
void write(std::ostream &os, Writer &w) {
  const char *data = w.data();
  typedef internal::MakeUnsigned<std::streamsize>::Type UnsignedStreamSize;
  UnsignedStreamSize size = w.size();
  UnsignedStreamSize max_size =
      internal::to_unsigned((std::numeric_limits<std::streamsize>::max)());
  do {
    UnsignedStreamSize n = size <= max_size ? size : max_size;
    os.write(data, static_cast<std::streamsize>(n));
    data += n;
    size -= n;
  } while (size != 0);
}
}

FMT_FUNC void print(std::ostream &os, CStringRef format_str, ArgList args) {
  MemoryWriter w;
  w.write(format_str, args);
  write(os, w);
}

FMT_FUNC int fprintf(std::ostream &os, CStringRef format, ArgList args) {
  MemoryWriter w;
  printf(w, format, args);
  write(os, w);
  return static_cast<int>(w.size());
}
}  // namespace fmt