зеркало из https://github.com/mozilla/gecko-dev.git
136 строки
3.8 KiB
C++
Executable File
136 строки
3.8 KiB
C++
Executable File
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1994-2000 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Original Author:
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* Scott Collins <scc@mozilla.org>
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU General Public License Version 2 or later (the
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* "GPL"), in which case the provisions of the GPL are applicable
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* instead of those above. If you wish to allow use of your
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* version of this file only under the terms of the GPL and not to
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* allow others to use your version of this file under the MPL,
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* indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by
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* the GPL. If you do not delete the provisions above, a recipient
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* may use your version of this file under either the MPL or the
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* GPL.
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*/
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#include "nsPrintfCString.h"
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#include <stdarg.h>
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#include "prprf.h"
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nsPrintfCString::nsPrintfCString( const char* format, ... )
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: mStart(mLocalBuffer),
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mLength(0)
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{
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va_list ap;
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size_t logical_capacity = kLocalBufferSize;
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size_t physical_capacity = logical_capacity + 1;
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va_start(ap, format);
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mLength = PR_vsnprintf(mStart, physical_capacity, format, ap);
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va_end(ap);
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}
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nsPrintfCString::nsPrintfCString( size_t n, const char* format, ... )
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: mStart(mLocalBuffer),
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mLength(0)
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{
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va_list ap;
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// make sure there's at least |n| space
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size_t logical_capacity = kLocalBufferSize;
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if ( n > logical_capacity )
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{
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char* nonlocal_buffer = new char[n];
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// if we got something, use it
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if ( nonlocal_buffer )
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{
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mStart = nonlocal_buffer;
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logical_capacity = n;
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}
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// else, it's the error case ... we'll use what space we have
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// (since we can't throw)
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}
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size_t physical_capacity = logical_capacity + 1;
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va_start(ap, format);
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mLength = PR_vsnprintf(mStart, physical_capacity, format, ap);
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va_end(ap);
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}
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nsPrintfCString::~nsPrintfCString()
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{
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if ( mStart != mLocalBuffer )
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delete [] mStart;
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}
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PRUint32
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nsPrintfCString::Length() const
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{
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return mLength;
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}
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#if 0
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PRBool
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nsPrintfCString::GetReadableFragment( nsReadableFragment<char>& aFragment, nsFragmentRequest aRequest ) const
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{
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switch ( aRequest )
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{
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case kFirstFragment:
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case kLastFragment:
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aFragment.mFragmentIdentifier = this;
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// fall through
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case kThisFragment:
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aFragment.mStart = mStart;
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aFragment.mEnd = mStart + mLength;
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return PR_TRUE;
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default:
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return PR_FALSE;
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}
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}
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#else
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const char*
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nsPrintfCString::GetReadableFragment( nsReadableFragment<char>& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset ) const
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{
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switch ( aRequest )
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{
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case kFirstFragment:
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case kLastFragment:
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case kFragmentAt:
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aFragment.mEnd = (aFragment.mStart = mStart) + mLength;
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return mStart + aOffset;
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case kPrevFragment:
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case kNextFragment:
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default:
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return 0;
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}
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}
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#endif
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