1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is mozilla.org code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Pierre Phaneuf <pp@ludusdesign.com>
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either of the GNU General Public License Version 2 or later (the "GPL"),
27 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
31 : * use your version of this file under the terms of the MPL, indicate your
32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #include "nsUnicharBuffer.h"
40 : #include "nsCRT.h"
41 :
42 : #define MIN_BUFFER_SIZE 32
43 :
44 2750 : UnicharBufferImpl::UnicharBufferImpl()
45 2750 : : mBuffer(NULL), mSpace(0), mLength(0)
46 : {
47 2750 : }
48 :
49 : NS_METHOD
50 2750 : UnicharBufferImpl::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
51 : {
52 2750 : if (aOuter)
53 0 : return NS_ERROR_NO_AGGREGATION;
54 :
55 2750 : UnicharBufferImpl* it = new UnicharBufferImpl();
56 2750 : if (it == nsnull)
57 0 : return NS_ERROR_OUT_OF_MEMORY;
58 :
59 2750 : NS_ADDREF(it);
60 2750 : nsresult rv = it->QueryInterface(aIID, aResult);
61 2750 : NS_RELEASE(it);
62 2750 : return rv;
63 : }
64 :
65 : NS_IMETHODIMP
66 2750 : UnicharBufferImpl::Init(PRUint32 aBufferSize)
67 : {
68 2750 : if (aBufferSize < MIN_BUFFER_SIZE) {
69 24 : aBufferSize = MIN_BUFFER_SIZE;
70 : }
71 2750 : mSpace = aBufferSize;
72 2750 : mLength = 0;
73 5500 : mBuffer = new PRUnichar[aBufferSize];
74 2750 : return mBuffer ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
75 : }
76 :
77 24750 : NS_IMPL_ISUPPORTS1(UnicharBufferImpl, nsIUnicharBuffer)
78 :
79 2750 : UnicharBufferImpl::~UnicharBufferImpl()
80 : {
81 2750 : if (nsnull != mBuffer) {
82 2750 : delete[] mBuffer;
83 2750 : mBuffer = nsnull;
84 : }
85 2750 : mLength = 0;
86 2750 : }
87 :
88 : NS_IMETHODIMP_(PRInt32)
89 0 : UnicharBufferImpl::GetLength() const
90 : {
91 0 : return mLength;
92 : }
93 :
94 : NS_IMETHODIMP_(PRInt32)
95 9269 : UnicharBufferImpl::GetBufferSize() const
96 : {
97 9269 : return mSpace;
98 : }
99 :
100 : NS_IMETHODIMP_(PRUnichar*)
101 12618 : UnicharBufferImpl::GetBuffer() const
102 : {
103 12618 : return mBuffer;
104 : }
105 :
106 : NS_IMETHODIMP_(bool)
107 0 : UnicharBufferImpl::Grow(PRInt32 aNewSize)
108 : {
109 0 : if (PRUint32(aNewSize) < MIN_BUFFER_SIZE) {
110 0 : aNewSize = MIN_BUFFER_SIZE;
111 : }
112 0 : PRUnichar* newbuf = new PRUnichar[aNewSize];
113 0 : if (nsnull != newbuf) {
114 0 : if (0 != mLength) {
115 0 : memcpy(newbuf, mBuffer, mLength * sizeof(PRUnichar));
116 : }
117 0 : delete[] mBuffer;
118 0 : mBuffer = newbuf;
119 0 : return true;
120 : }
121 0 : return false;
122 : }
123 :
124 : nsresult
125 2750 : NS_NewUnicharBuffer(nsIUnicharBuffer** aInstancePtrResult,
126 : nsISupports* aOuter,
127 : PRUint32 aBufferSize)
128 : {
129 : nsresult rv;
130 : nsIUnicharBuffer* buf;
131 : rv = UnicharBufferImpl::Create(aOuter, NS_GET_IID(nsIUnicharBuffer),
132 2750 : (void**)&buf);
133 2750 : if (NS_FAILED(rv)) return rv;
134 2750 : rv = buf->Init(aBufferSize);
135 2750 : if (NS_FAILED(rv)) {
136 0 : NS_RELEASE(buf);
137 0 : return rv;
138 : }
139 2750 : *aInstancePtrResult = buf;
140 2750 : return rv;
141 : }
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