UnnamedPipe.cpp

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00001 /*******************************************************************************
00002 * Copyright (C) 2004 Vintela, Inc. All rights reserved.
00003 * Copyright (C) 2005 Novell, Inc. All rights reserved.
00004 *
00005 * Redistribution and use in source and binary forms, with or without
00006 * modification, are permitted provided that the following conditions are met:
00007 *
00008 *  - Redistributions of source code must retain the above copyright notice,
00009 *    this list of conditions and the following disclaimer.
00010 *
00011 *  - Redistributions in binary form must reproduce the above copyright notice,
00012 *    this list of conditions and the following disclaimer in the documentation
00013 *    and/or other materials provided with the distribution.
00014 *
00015 *  - Neither the name of Vintela, Inc., Novell, Inc., nor the names of its
00016 *    contributors may be used to endorse or promote products derived from this
00017 *    software without specific prior written permission.
00018 *
00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00022 * ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc., Novell, Inc., OR THE 
00023 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
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00025 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
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00030 *******************************************************************************/
00031 
00032 
00038 #include "blocxx/BLOCXX_config.h"
00039 #include "blocxx/UnnamedPipe.hpp"
00040 #include "blocxx/AutoPtr.hpp"
00041 #include "blocxx/String.hpp"
00042 #include "blocxx/StringBuffer.hpp"
00043 #include "blocxx/ExceptionIds.hpp"
00044 
00045 namespace BLOCXX_NAMESPACE
00046 {
00047 
00048 BLOCXX_DEFINE_EXCEPTION_WITH_ID(UnnamedPipe);
00049 
00051 UnnamedPipe::~UnnamedPipe()
00052 {
00053 }
00055 int
00056 UnnamedPipe::writeInt(int value)
00057 {
00058    return this->write(&value, sizeof(int));
00059 }
00061 int
00062 UnnamedPipe::writeString(const String& strData)
00063 {
00064    int rc;
00065    int len = static_cast<int>(strData.length()+1);
00066    if ((rc = this->writeInt(len)) != -1)
00067    {
00068       rc = this->write(strData.c_str(), len);
00069    }
00070    return rc;
00071 }
00073 int
00074 UnnamedPipe::readInt(int* value)
00075 {
00076    return this->read(value, sizeof(int));
00077 }
00079 int
00080 UnnamedPipe::readString(String& strData)
00081 {
00082    int len;
00083    int rc;
00084    
00085    if ((rc = this->readInt(&len)) != -1)
00086    {
00087       AutoPtrVec<char> p(new char[len+1]);
00088 
00089       // writeString() writes the '\0' terminator, so we don't worry about it here.
00090       if ((rc = this->read(p.get(), len)) != -1)
00091       {  
00092          strData = String(String::E_TAKE_OWNERSHIP, p.release(), len);
00093       }
00094    }
00095    return rc;
00096 }
00098 String
00099 UnnamedPipe::readAll()
00100 {
00101    char buf[1024];
00102    int readbytes;
00103    StringBuffer retval;
00104    do
00105    {
00106       readbytes = this->read(buf, sizeof(buf)-1, true); // throws on error
00107       buf[readbytes] = 0; // null-terminate the buffer
00108       retval += buf;
00109    } while (readbytes > 0); // keep going until we don't fill up the buffer.
00110    return retval.releaseString();
00111 }
00112 
00113 } // end namespace BLOCXX_NAMESPACE
00114 

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