From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- xpcom/string/nsPrintfCString.h | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 xpcom/string/nsPrintfCString.h (limited to 'xpcom/string/nsPrintfCString.h') diff --git a/xpcom/string/nsPrintfCString.h b/xpcom/string/nsPrintfCString.h new file mode 100644 index 000000000..ce90ec497 --- /dev/null +++ b/xpcom/string/nsPrintfCString.h @@ -0,0 +1,42 @@ +/* -*- 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/. */ + +#ifndef nsPrintfCString_h___ +#define nsPrintfCString_h___ + +#include "nsString.h" + +/** + * nsPrintfCString lets you create a nsCString using a printf-style format + * string. For example: + * + * NS_WARNING(nsPrintfCString("Unexpected value: %f", 13.917).get()); + * + * nsPrintfCString has a small built-in auto-buffer. For larger strings, it + * will allocate on the heap. + * + * See also nsCString::AppendPrintf(). + */ +class nsPrintfCString : public nsFixedCString +{ + typedef nsCString string_type; + +public: + explicit nsPrintfCString(const char_type* aFormat, ...) + : nsFixedCString(mLocalBuffer, kLocalBufferSize, 0) + { + va_list ap; + va_start(ap, aFormat); + AppendPrintf(aFormat, ap); + va_end(ap); + } + +private: + static const uint32_t kLocalBufferSize = 16; + char_type mLocalBuffer[kLocalBufferSize]; +}; + +#endif // !defined(nsPrintfCString_h___) -- cgit v1.2.3