mfbt/Snprintf.h
author B2G Bumper Bot <release+b2gbumper@mozilla.com>
Mon, 22 Feb 2016 20:52:33 -0800
changeset 325574 f177f8ec083efc5ddb5d3c854ae7bb383b1b6a45
parent 276340 bdb8d05f8870425176e12885c16f339439e2d3b0
child 344009 3f99486c6b0157f468e0bc76bdc2348daf158541
permissions -rw-r--r--
Bumping gaia.json for 2 gaia revision(s) a=gaia-bump ======== https://hg.mozilla.org/integration/gaia-central/rev/8c0f20540765 Author: Ricky Chien <rickychien@users.noreply.github.com> Desc: Merge pull request #34079 from rickychien/show-hint-after-load Bug 1250032 - [Marketplace] Hint should show after the app finish loading r=@luke-chang ======== https://hg.mozilla.org/integration/gaia-central/rev/8dd0b87892a1 Author: Ricky Chien <ricky060709@gmail.com> Desc: Bug 1250032 - [Marketplace] Hint should show after the app finish loading

/* -*- 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/. */

/* Polyfills snprintf() on platforms that don't provide it, and provides
 * related utilities. */

#ifndef mozilla_Snprintf_h_
#define mozilla_Snprintf_h_

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

// Older MSVC versions do not provide snprintf(), but they do provide
// vsnprintf(), which has the same semantics except that if the number of
// characters written equals the buffer size, it does not write a null
// terminator, so we wrap it to do so.
#if defined(_MSC_VER) && _MSC_VER < 1900
#include "mozilla/Attributes.h"
MOZ_ALWAYS_INLINE int snprintf(char* buffer, size_t n, const char* format, ...)
{
  va_list args;
  va_start(args, format);
  int result = vsnprintf(buffer, n, format, args);
  va_end(args);
  buffer[n - 1] = '\0';
  return result;
}
#endif

// In addition, in C++ code, on all platforms, provide an snprintf_literal()
// function which uses template argument deduction to deduce the size of the
// buffer, avoiding the need for the user to pass it in explicitly.
#ifdef __cplusplus
template <size_t N>
int snprintf_literal(char (&buffer)[N], const char* format, ...)
{
  va_list args;
  va_start(args, format);
  int result = vsnprintf(buffer, N, format, args);
  va_end(args);
  buffer[N - 1] = '\0';
  return result;
}
#endif

#endif  /* mozilla_Snprintf_h_ */