PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // StringPStreamBuf.cc 00004 // 00005 // Copyright (C) 2004 Pascal Vincent 00006 // 00007 // Redistribution and use in source and binary forms, with or without 00008 // modification, are permitted provided that the following conditions are met: 00009 // 00010 // 1. Redistributions of source code must retain the above copyright 00011 // notice, this list of conditions and the following disclaimer. 00012 // 00013 // 2. Redistributions in binary form must reproduce the above copyright 00014 // notice, this list of conditions and the following disclaimer in the 00015 // documentation and/or other materials provided with the distribution. 00016 // 00017 // 3. The name of the authors may not be used to endorse or promote 00018 // products derived from this software without specific prior written 00019 // permission. 00020 // 00021 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 00022 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00023 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 00024 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00025 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00026 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00027 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00028 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00029 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00030 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00031 // 00032 // This file is part of the PLearn library. For more information on the PLearn 00033 // library, go to the PLearn Web site at www.plearn.org 00034 00035 /* ******************************************************* 00036 * $Id: StringPStreamBuf.cc 3994 2005-08-25 13:35:03Z chapados $ 00037 ******************************************************* */ 00038 00039 // Authors: Pascal Vincent 00040 00044 #include "StringPStreamBuf.h" 00045 // #include <unistd.h> 00046 00047 namespace PLearn { 00048 using namespace std; 00049 00050 StringPStreamBuf::StringPStreamBuf(string* ptrs, const string& openmode, bool own_string_, 00051 streamsize inbuf_capacity, streamsize outbuf_capacity, streamsize unget_capacity) 00052 :PStreamBuf(openmode=="r", openmode=="w" || openmode=="a", inbuf_capacity, outbuf_capacity, unget_capacity), 00053 st(ptrs), read_index(0), own_string(own_string_) 00054 { 00055 if(openmode=="w") // truncate it first 00056 st->clear(); 00057 00058 else if(openmode!="r" && openmode!="a") 00059 PLERROR("In StringPStreamBuf invalid openmode %s, must be one of r, w, a",openmode.c_str()); 00060 } 00061 00062 StringPStreamBuf::StringPStreamBuf(const string* ptrs, const string& openmode, bool own_string_, 00063 streamsize inbuf_capacity, streamsize unget_capacity) 00064 :PStreamBuf(true, false, inbuf_capacity, 0, unget_capacity), 00065 st(const_cast<string*>(ptrs)), read_index(0), own_string(own_string_) 00066 { 00067 if(openmode!="r") 00068 PLERROR("In StringPStreamBuf(const string*, ...) invalid openmode %s, must be one of r if giving a const string* ",openmode.c_str()); 00069 } 00070 00071 StringPStreamBuf::~StringPStreamBuf() 00072 { 00073 flush(); 00074 00075 if(own_string && st!=0) 00076 delete st; 00077 } 00078 00079 StringPStreamBuf::streamsize StringPStreamBuf::read_(char* p, streamsize n) 00080 { 00081 string::size_type nread = st->copy(p, string::size_type(n), read_index); 00082 read_index += nread; 00083 return streamsize(nread); 00084 } 00085 00087 void StringPStreamBuf::write_(const char* p, streamsize n) 00088 { 00089 while(n--) 00090 st->operator+=(*p++); 00091 } 00092 00093 } // end of namespace PLearn 00094 00095 00096 /* 00097 Local Variables: 00098 mode:c++ 00099 c-basic-offset:4 00100 c-file-style:"stroustrup" 00101 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00102 indent-tabs-mode:nil 00103 fill-column:79 00104 End: 00105 */ 00106 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :