mfbt/Sprintf.h
author Alessio Placitelli <alessio.placitelli@gmail.com>
Wed, 07 Sep 2016 02:39:00 +0200
changeset 314717 66a2fa62d7601aaae4069bc9a2c4ec13854f65e7
parent 314052 7bb1a3059c9100917db0240fd817f5695a8b0f76
child 318605 818fc5631d72200e868ea4cdcd97f3d1f09e4970
permissions -rw-r--r--
Bug 1277806 - Add support for the keyed scalars to the scalar registry. r=gfritzsche MozReview-Commit-ID: 8dKj92Kh2Ev

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* Provides a safer sprintf for printing to fixed-size character arrays. */

#ifndef mozilla_Sprintf_h_
#define mozilla_Sprintf_h_

#include <stdio.h>
#include <stdarg.h>

#include "mozilla/Assertions.h"

#ifdef __cplusplus

template <size_t N>
int VsprintfLiteral(char (&buffer)[N], const char* format, va_list args)
{
    MOZ_ASSERT(format != buffer);
    int result = vsnprintf(buffer, N, format, args);
    buffer[N - 1] = '\0';
    return result;
}

template <size_t N>
#if defined(__GNUC__)
  __attribute__((format(printf, 2, 3)))
#endif
int SprintfLiteral(char (&buffer)[N], const char* format, ...)
{
  va_list args;
  va_start(args, format);
  int result = VsprintfLiteral(buffer, format, args);
  va_end(args);
  return result;
}

#endif
#endif  /* mozilla_Sprintf_h_ */