mfbt/Sprintf.h
author Chris Manchester <cmanchester@mozilla.com>
Wed, 16 Jan 2019 22:46:38 +0000
changeset 514323 471d9fab61b34671f974dfa349e7972c200faa2b
parent 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1507631 - Remove mentions of MOZ_SIGN_CMD from the build system. r=nalexander Differential Revision: https://phabricator.services.mozilla.com/D16754

/* -*- 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_ */