00001 /******************************************************************************* 00002 00003 @file GrowBuffer.d 00004 00005 Copyright (c) 2004 Kris Bell 00006 00007 This software is provided 'as-is', without any express or implied 00008 warranty. In no event will the authors be held liable for damages 00009 of any kind arising from the use of this software. 00010 00011 Permission is hereby granted to anyone to use this software for any 00012 purpose, including commercial applications, and to alter it and/or 00013 redistribute it freely, subject to the following restrictions: 00014 00015 1. The origin of this software must not be misrepresented; you must 00016 not claim that you wrote the original software. If you use this 00017 software in a product, an acknowledgment within documentation of 00018 said product would be appreciated but is not required. 00019 00020 2. Altered source versions must be plainly marked as such, and must 00021 not be misrepresented as being the original software. 00022 00023 3. This notice may not be removed or altered from any distribution 00024 of the source. 00025 00026 4. Derivative works are permitted, but they must carry this notice 00027 in full and credit the original source. 00028 00029 00030 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 00031 00032 00033 @version Initial version; March 2004 00034 00035 @author Kris 00036 00037 00038 *******************************************************************************/ 00039 00040 module mango.io.GrowBuffer; 00041 00042 private import mango.io.Buffer; 00043 00044 /******************************************************************************* 00045 00046 Subclass to provide support for content growth. This is handy when 00047 you want to keep a buffer around as a scratchpad. 00048 00049 *******************************************************************************/ 00050 00051 class GrowBuffer : Buffer 00052 { 00053 /*********************************************************************** 00054 00055 Create a GrowBuffer with the specified initial size. 00056 00057 ***********************************************************************/ 00058 00059 this (uint size) 00060 { 00061 super (size); 00062 } 00063 00064 /*********************************************************************** 00065 00066 Overridable method to grow the buffer to the specified size 00067 when it becomes full. GrowableBuffer.grow(size) will not grow 00068 the buffer by a factor larger than 2 for each call. 00069 00070 ***********************************************************************/ 00071 00072 protected override bool grow (uint size) 00073 { 00074 if (data.length < uint.max / 2) 00075 { 00076 uint i = data.length * 2; 00077 if (i < size) 00078 i = size; 00079 data.length = i; 00080 capacity = i; 00081 return true; 00082 } 00083 return false; 00084 } 00085 }