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XSECSafeBuffer.hpp

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00001 /*
00002  * The Apache Software License, Version 1.1
00003  *
00004  *
00005  * Copyright (c) 1999 The Apache Software Foundation.  All rights 
00006  * reserved.
00007  *
00008  * Redistribution and use in source and binary forms, with or without
00009  * modification, are permitted provided that the following conditions
00010  * are met:
00011  *
00012  * 1. Redistributions of source code must retain the above copyright
00013  *    notice, this list of conditions and the following disclaimer. 
00014  *
00015  * 2. Redistributions in binary form must reproduce the above copyright
00016  *    notice, this list of conditions and the following disclaimer in
00017  *    the documentation and/or other materials provided with the
00018  *    distribution.
00019  *
00020  * 3. The end-user documentation included with the redistribution,
00021  *    if any, must include the following acknowledgment:  
00022  *       "This product includes software developed by the
00023  *        Apache Software Foundation (http://www.apache.org/)."
00024  *    Alternately, this acknowledgment may appear in the software itself,
00025  *    if and wherever such third-party acknowledgments normally appear.
00026  *
00027  * 4. The names "<WebSig>" and "Apache Software Foundation" must
00028  *    not be used to endorse or promote products derived from this
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00031  *
00032  * 5. Products derived from this software may not be called "Apache",
00033  *    nor may "Apache" appear in their name, without prior written
00034  *    permission of the Apache Software Foundation.
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00036  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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00048  * ====================================================================
00049  *
00050  * This software consists of voluntary contributions made by many
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00052  * originally based on software copyright (c) 2001, Institute for
00053  * Data Communications Systems, <http://www.nue.et-inf.uni-siegen.de/>.
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00056  * For more information on the Apache Software Foundation, please see
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00058  */
00059 
00060 /*
00061  * XSEC
00062  *
00063  * XSECSafeBuffer := a class for storing expanding amounts of information.
00064  *
00065  * Author(s): Berin Lautenbach
00066  *
00067  * $Id: XSECSafeBuffer.hpp,v 1.7 2003/04/24 00:06:20 blautenb Exp $
00068  *                   
00069  */
00070 
00071 
00072 #ifndef XSECSAFEBUFFER_INCLUDE
00073 #define XSECSAFEBUFFER_INCLUDE
00074 
00075 #include <xsec/framework/XSECDefs.hpp>
00076 #include <xercesc/util/XMLString.hpp>
00077 
00084 #define DEFAULT_SAFE_BUFFER_SIZE        1024        // Default size for a safe Buffer
00085 
00102 class CANON_EXPORT safeBuffer {
00103 
00104 public:
00105 
00106     // For checking we are operating on the buffer correctly
00107     enum bufferType {
00108 
00109         BUFFER_UNKNOWN      = 0,
00110         BUFFER_CHAR         = 1,
00111         BUFFER_UNICODE      = 2
00112     };
00113 
00114 
00115     safeBuffer();
00116     safeBuffer(int initialSize);
00117     safeBuffer(const char * inStr, unsigned int initialSize = DEFAULT_SAFE_BUFFER_SIZE);
00118     safeBuffer(const safeBuffer & other);
00119 
00120     ~safeBuffer();
00121 
00122     static void init(void);
00123 
00124     // "IN" functions - these read in information to the buffer
00125 
00126     void sbStrcpyIn(const char * inStr);
00127     void sbStrcpyIn(const safeBuffer & inStr);
00128     void sbStrncpyIn(const char * inStr, int n);
00129     void sbStrncpyIn(const safeBuffer & inStr, int n);
00130     void sbStrcatIn(const char * inStr);
00131     void sbStrcatIn(const safeBuffer & inStr);
00132     void sbStrncatIn(const char * inStr, int n);
00133     void sbStrinsIn(const char * inStr, unsigned int offset);
00134 
00135     void sbMemcpyIn(const void * inBuf, int n);
00136     void sbMemcpyIn(int offset, const void * inBuf, int n);
00137 
00138     void sbMemcpyOut(void * outBuf, int n) const;
00139     void sbMemshift(int toOffset, int fromOffset, int len);
00140 
00141     // Comparison functions
00142 
00143     int sbStrncmp(const char * inStr, int n) const;
00144     int sbOffsetStrcmp(const char * inStr, unsigned int offset) const;
00145     int sbOffsetStrncmp(const char * inStr, unsigned int offset, int n) const;
00146     int sbStrcmp(const char * inStr) const;
00147     int sbStrcmp(const safeBuffer & inStr) const;
00148     int sbStrstr(const char * inStr) const;
00149     int sbOffsetStrstr(const char * inStr, unsigned int offset) const;
00150 
00151 
00152     // Operators
00153 
00154     unsigned char & operator[](int n);
00155     safeBuffer & operator= (const safeBuffer & cpy);
00156 
00157     // Get functions
00158 
00159     int sbStrlen(void) const;
00160     unsigned int sbRawBufferSize(void) const;
00161 
00162     // raw buffer manipulation
00163 
00164     const unsigned char * rawBuffer() const;
00165     const char * rawCharBuffer() const;
00166     const XMLCh * rawXMLChBuffer() const;
00167     void resize(unsigned int sz);           // NOTE : Only grows
00168     void setBufferType(bufferType bt);      // Use with care
00169 
00170     // Unicode (UTF-16 manipulation)
00171     const XMLCh * sbStrToXMLCh(void);           // Note does not affect internal buffer
00172     void sbTranscodeIn(const XMLCh * inStr);    // Create a local string from UTF-16
00173     void sbTranscodeIn(const char * inStr);     // Create a UTF-16 string from local
00174     void sbXMLChIn(const XMLCh * in);           // Buffer holds XMLCh *
00175     void sbXMLChAppendCh(const XMLCh c);        // Append a Unicode character to the buffer
00176     void sbXMLChCat(const XMLCh *str);          // Append a UTF-16 string to the buffer
00177     void sbXMLChCat(const char * str);          // Append a (transcoded) local string to the buffer
00178 
00179 
00180 private:
00181 
00182     // Internal function that is used to get a string size and 
00183     // then re-allocate if necessary
00184 
00185     void checkAndExpand(unsigned int size);
00186     void checkBufferType(bufferType bt) const;
00187 
00188     unsigned char * buffer;
00189     unsigned int    bufferSize;
00190     XMLCh           * mp_XMLCh;
00191     bufferType      m_bufferType;
00192 
00193     // For XMLCh manipulation
00194     static size_t   size_XMLCh;
00195 };
00196 
00199 #endif /* XSECSAFEBUFFER_INCLUDE */
00200 

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