The Tor Browser: xpcom/string/public/nsPrintfCString.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef nsPrintfCString_h___

     7 #define nsPrintfCString_h___

     9 #include "nsString.h"

    11 /**

    12  * nsPrintfCString lets you create a nsCString using a printf-style format

    13  * string.  For example:

    14  *

    15  *   NS_WARNING(nsPrintfCString("Unexpected value: %f", 13.917).get());

    16  *

    17  * nsPrintfCString has a small built-in auto-buffer.  For larger strings, it

    18  * will allocate on the heap.

    19  *

    20  * See also nsCString::AppendPrintf().

    21  */

    22 class nsPrintfCString : public nsFixedCString

    23 {

    24   typedef nsCString string_type;

    26 public:

    27   explicit nsPrintfCString( const char_type* format, ... )

    28     : nsFixedCString(mLocalBuffer, kLocalBufferSize, 0)

    29   {

    30     va_list ap;

    31     va_start(ap, format);

    32     AppendPrintf(format, ap);

    33     va_end(ap);

    34   }

    36 private:

    37   static const uint32_t kLocalBufferSize = 16;

    38   char_type mLocalBuffer[kLocalBufferSize];

    39 };

    41 #endif // !defined(nsPrintfCString_h___)

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