mfbt/Sprintf.h
author Bryce Van Dyk <bvandyk@mozilla.com>
Wed, 21 Nov 2018 09:43:47 +0000
changeset 506709 b42cd879741d9135b2681e355db070922473f0fe
parent 407547 8ce8c07e3e2928ef9d27c53225a6bb6a121799ba
child 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1508532 - Provide more verbose description of cdm add-on. r=cpearce,flod Differential Revision: https://phabricator.services.mozilla.com/D12383

/* -*- 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"
#include "mozilla/Attributes.h"

#ifdef __cplusplus

template <size_t N>
MOZ_FORMAT_PRINTF(2, 0)
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>
MOZ_FORMAT_PRINTF(2, 3)
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_ */