| 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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| 2 | /* ***** BEGIN LICENSE BLOCK *****
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| 3 | * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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| 4 | *
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| 5 | * The contents of this file are subject to the Mozilla Public License Version
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| 6 | * 1.1 (the "License"); you may not use this file except in compliance with
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| 7 | * the License. You may obtain a copy of the License at
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| 8 | * http://www.mozilla.org/MPL/
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| 9 | *
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| 10 | * Software distributed under the License is distributed on an "AS IS" basis,
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| 11 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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| 12 | * for the specific language governing rights and limitations under the
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| 13 | * License.
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| 14 | *
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| 15 | * The Original Code is mozilla.org code.
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| 16 | *
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| 17 | * The Initial Developer of the Original Code is
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| 18 | * Netscape Communications Corporation.
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| 19 | * Portions created by the Initial Developer are Copyright (C) 1998
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| 20 | * the Initial Developer. All Rights Reserved.
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| 21 | *
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| 22 | * Contributor(s):
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| 23 | * Pierre Phaneuf <[email protected]>
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| 24 | *
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| 25 | * Alternatively, the contents of this file may be used under the terms of
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| 26 | * either of the GNU General Public License Version 2 or later (the "GPL"),
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| 27 | * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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| 28 | * in which case the provisions of the GPL or the LGPL are applicable instead
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| 29 | * of those above. If you wish to allow use of your version of this file only
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| 30 | * under the terms of either the GPL or the LGPL, and not to allow others to
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| 31 | * use your version of this file under the terms of the MPL, indicate your
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| 32 | * decision by deleting the provisions above and replace them with the notice
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| 33 | * and other provisions required by the GPL or the LGPL. If you do not delete
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| 34 | * the provisions above, a recipient may use your version of this file under
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| 35 | * the terms of any one of the MPL, the GPL or the LGPL.
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| 36 | *
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| 37 | * ***** END LICENSE BLOCK ***** */
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| 38 |
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| 39 | #include "nsUnicharBuffer.h"
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| 40 | #include "nsCRT.h"
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| 41 |
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| 42 | #define MIN_BUFFER_SIZE 32
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| 43 |
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| 44 | UnicharBufferImpl::UnicharBufferImpl()
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| 45 | : mBuffer(NULL), mSpace(0), mLength(0)
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| 46 | {
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| 47 | }
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| 48 |
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| 49 | NS_METHOD
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| 50 | UnicharBufferImpl::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
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| 51 | {
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| 52 | if (aOuter)
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| 53 | return NS_ERROR_NO_AGGREGATION;
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| 54 |
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| 55 | UnicharBufferImpl* it = new UnicharBufferImpl();
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| 56 | if (it == nsnull)
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| 57 | return NS_ERROR_OUT_OF_MEMORY;
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| 58 |
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| 59 | NS_ADDREF(it);
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| 60 | nsresult rv = it->QueryInterface(aIID, aResult);
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| 61 | NS_RELEASE(it);
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| 62 | return rv;
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| 63 | }
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| 64 |
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| 65 | NS_IMETHODIMP
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| 66 | UnicharBufferImpl::Init(PRUint32 aBufferSize)
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| 67 | {
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| 68 | if (aBufferSize < MIN_BUFFER_SIZE) {
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| 69 | aBufferSize = MIN_BUFFER_SIZE;
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| 70 | }
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| 71 | mSpace = aBufferSize;
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| 72 | mLength = 0;
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| 73 | mBuffer = new PRUnichar[aBufferSize];
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| 74 | return mBuffer ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
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| 75 | }
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| 76 |
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| 77 | NS_IMPL_ISUPPORTS1(UnicharBufferImpl, nsIUnicharBuffer)
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| 78 |
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| 79 | UnicharBufferImpl::~UnicharBufferImpl()
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| 80 | {
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| 81 | if (nsnull != mBuffer) {
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| 82 | delete[] mBuffer;
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| 83 | mBuffer = nsnull;
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| 84 | }
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| 85 | mLength = 0;
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| 86 | }
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| 87 |
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| 88 | NS_IMETHODIMP_(PRInt32)
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| 89 | UnicharBufferImpl::GetLength() const
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| 90 | {
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| 91 | return mLength;
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| 92 | }
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| 93 |
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| 94 | NS_IMETHODIMP_(PRInt32)
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| 95 | UnicharBufferImpl::GetBufferSize() const
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| 96 | {
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| 97 | return mSpace;
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| 98 | }
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| 99 |
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| 100 | NS_IMETHODIMP_(PRUnichar*)
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| 101 | UnicharBufferImpl::GetBuffer() const
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| 102 | {
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| 103 | return mBuffer;
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| 104 | }
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| 105 |
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| 106 | NS_IMETHODIMP_(PRBool)
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| 107 | UnicharBufferImpl::Grow(PRInt32 aNewSize)
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| 108 | {
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| 109 | if (PRUint32(aNewSize) < MIN_BUFFER_SIZE) {
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| 110 | aNewSize = MIN_BUFFER_SIZE;
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| 111 | }
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| 112 | PRUnichar* newbuf = new PRUnichar[aNewSize];
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| 113 | if (nsnull != newbuf) {
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| 114 | if (0 != mLength) {
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| 115 | memcpy(newbuf, mBuffer, mLength * sizeof(PRUnichar));
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| 116 | }
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| 117 | delete[] mBuffer;
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| 118 | mBuffer = newbuf;
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| 119 | return PR_TRUE;
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| 120 | }
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| 121 | return PR_FALSE;
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| 122 | }
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| 123 |
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| 124 | NS_COM nsresult
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| 125 | NS_NewUnicharBuffer(nsIUnicharBuffer** aInstancePtrResult,
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| 126 | nsISupports* aOuter,
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| 127 | PRUint32 aBufferSize)
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| 128 | {
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| 129 | nsresult rv;
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| 130 | nsIUnicharBuffer* buf;
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| 131 | rv = UnicharBufferImpl::Create(aOuter, NS_GET_IID(nsIUnicharBuffer),
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| 132 | (void**)&buf);
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| 133 | if (NS_FAILED(rv)) return rv;
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| 134 | rv = buf->Init(aBufferSize);
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| 135 | if (NS_FAILED(rv)) {
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| 136 | NS_RELEASE(buf);
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| 137 | return rv;
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| 138 | }
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| 139 | *aInstancePtrResult = buf;
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| 140 | return rv;
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| 141 | }
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