URLAccessCFBinInputStream.cpp
上传用户:zhuqijet
上传日期:2013-06-25
资源大小:10074k
文件大小:7k
源码类别:
词法分析
开发平台:
Visual C++
- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2000 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation, and was
- * originally based on software copyright (c) 1999, International
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- *
- * Written by James D. Berry, Critical Path Software, Inc., 2002-02-17
- *
- */
- /*
- * $Id: URLAccessCFBinInputStream.cpp,v 1.4 2002/12/06 16:43:12 tng Exp $
- */
- #include <cstdlib>
- #include <cstring>
- #include <xercesc/util/XMLNetAccessor.hpp>
- #include <xercesc/util/NetAccessors/MacOSURLAccessCF/URLAccessCFBinInputStream.hpp>
- #include <xercesc/util/XMLString.hpp>
- #include <xercesc/util/XMLExceptMsgs.hpp>
- #include <xercesc/util/Janitor.hpp>
- XERCES_CPP_NAMESPACE_BEGIN
- URLAccessCFBinInputStream::URLAccessCFBinInputStream(const XMLURL& urlSource)
- : mBytesProcessed(0),
- mDataRef(NULL)
- {
- // Figure out what we're dealing with
- const XMLCh* urlText = urlSource.getURLText();
- unsigned int urlLength = XMLString::stringLen(urlText);
- // Create a CFString from the path
- CFStringRef stringRef = NULL;
- if (urlText)
- {
- stringRef = CFStringCreateWithCharacters(
- kCFAllocatorDefault,
- urlText,
- urlLength
- );
- }
- // Create a URLRef from the CFString
- CFURLRef urlRef = NULL;
- if (stringRef)
- {
- urlRef = CFURLCreateWithString(
- kCFAllocatorDefault,
- stringRef,
- NULL // CFURLRef baseURL
- );
- }
- // Fetch the data
- mDataRef = NULL;
- SInt32 errorCode = 0;
- Boolean success = false;
- if (stringRef)
- {
- success = CFURLCreateDataAndPropertiesFromResource(
- kCFAllocatorDefault,
- urlRef,
- &mDataRef,
- NULL, // CFDictionaryRef *properties,
- NULL, // CFArrayRef desiredProperties,
- &errorCode
- );
- }
- // Cleanup temporary stuff
- if (stringRef)
- CFRelease(stringRef);
- if (urlRef)
- CFRelease(urlRef);
- // Check for an error in fetching the data
- if (!success || errorCode)
- {
- // Dispose any potential dataRef
- if (mDataRef)
- {
- CFRelease(mDataRef);
- mDataRef = NULL;
- }
- // Do a best attempt at mapping some errors
- switch (errorCode)
- {
- case kCFURLUnknownSchemeError:
- ThrowXML(MalformedURLException, XMLExcepts::URL_UnsupportedProto);
- break;
- case kCFURLRemoteHostUnavailableError:
- ThrowXML1(NetAccessorException, XMLExcepts::NetAcc_TargetResolution, urlSource.getHost());
- break;
- case kCFURLUnknownError:
- ThrowXML1(NetAccessorException, XMLExcepts::NetAcc_ReadSocket, urlText);
- break;
- case kCFURLResourceNotFoundError:
- case kCFURLResourceAccessViolationError:
- case kCFURLTimeoutError:
- ThrowXML1(NetAccessorException, XMLExcepts::File_CouldNotOpenFile, urlText);
- break;
- case kCFURLImproperArgumentsError:
- case kCFURLUnknownPropertyKeyError:
- case kCFURLPropertyKeyUnavailableError:
- default:
- ThrowXML1(NetAccessorException, XMLExcepts::NetAcc_InternalError, urlText);
- break;
- }
- }
- }
- URLAccessCFBinInputStream::~URLAccessCFBinInputStream()
- {
- // Release any dataRef
- if (mDataRef)
- CFRelease(mDataRef);
- }
- //
- // We've already read the data into a dataRef.
- // Just spoon it out to the caller as they ask for it.
- //
- unsigned int
- URLAccessCFBinInputStream::readBytes(XMLByte* const toFill
- , const unsigned int maxToRead)
- {
- // If we don't have a dataRef, we can't return any data
- if (!mDataRef)
- return 0;
- // Get the length of the data we've fetched
- CFIndex dataLength = CFDataGetLength(mDataRef);
- // Calculate how much to return based on how much
- // we've already returned, and how much the user wants
- CFIndex n = dataLength - mBytesProcessed; // Amount remaining
- CFIndex desired = maxToRead & 0x7fffffff; // CFIndex is signed
- if (n > desired) // Amount desired
- n = desired;
- // Read the appropriate bytes into the user buffer
- CFRange range = CFRangeMake(mBytesProcessed, n);
- CFDataGetBytes(mDataRef, range, reinterpret_cast<UInt8*>(toFill));
- // Update bytes processed
- mBytesProcessed += n;
- // Return the number of bytes delivered
- return n;
- }
- XERCES_CPP_NAMESPACE_END