42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsPrintfCString_h___
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#define nsPrintfCString_h___
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#include "nsString.h"
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/**
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* nsPrintfCString lets you create a nsCString using a printf-style format
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* string. For example:
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*
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* NS_WARNING(nsPrintfCString("Unexpected value: %f", 13.917).get());
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*
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* nsPrintfCString has a small built-in auto-buffer. For larger strings, it
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* will allocate on the heap.
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*
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* See also nsCString::AppendPrintf().
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*/
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class nsPrintfCString : public nsFixedCString
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{
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typedef nsCString string_type;
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public:
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explicit nsPrintfCString(const char_type* aFormat, ...)
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: nsFixedCString(mLocalBuffer, kLocalBufferSize, 0)
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{
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va_list ap;
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va_start(ap, aFormat);
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AppendPrintf(aFormat, ap);
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va_end(ap);
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}
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private:
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static const uint32_t kLocalBufferSize = 16;
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char_type mLocalBuffer[kLocalBufferSize];
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};
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#endif // !defined(nsPrintfCString_h___)
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