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Diff for /pegasus/src/Pegasus/Common/StringRep.h between version 1.1.2.1 and 1.12.4.1

version 1.1.2.1, 2005/10/08 02:01:46 version 1.12.4.1, 2013/06/03 22:35:13
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 //%2005////////////////////////////////////////////////////////////////////////  //%LICENSE////////////////////////////////////////////////////////////////
 // //
 // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development  // Licensed to The Open Group (TOG) under one or more contributor license
 // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.  // agreements.  Refer to the OpenPegasusNOTICE.txt file distributed with
 // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;  // this work for additional information regarding copyright ownership.
 // IBM Corp.; EMC Corporation, The Open Group.  // Each contributor licenses this file to you under the OpenPegasus Open
 // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;  // Source License; you may not use this file except in compliance with the
 // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.  // License.
 // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;  
 // EMC Corporation; VERITAS Software Corporation; The Open Group.  
 //  
 // Permission is hereby granted, free of charge, to any person obtaining a copy  
 // of this software and associated documentation files (the "Software"), to  
 // deal in the Software without restriction, including without limitation the  
 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or  
 // sell copies of the Software, and to permit persons to whom the Software is  
 // furnished to do so, subject to the following conditions:  
 //  
 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN  
 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED  
 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT  
 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR  
 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT  
 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN  
 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION  
 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  
 // //
 //==============================================================================  // Permission is hereby granted, free of charge, to any person obtaining a
   // copy of this software and associated documentation files (the "Software"),
   // to deal in the Software without restriction, including without limitation
   // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   // and/or sell copies of the Software, and to permit persons to whom the
   // Software is furnished to do so, subject to the following conditions:
   //
   // The above copyright notice and this permission notice shall be included
   // in all copies or substantial portions of the Software.
   //
   // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
   // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   //
   //////////////////////////////////////////////////////////////////////////
 // //
 //%///////////////////////////////////////////////////////////////////////////// //%/////////////////////////////////////////////////////////////////////////////
  
 #ifndef _Pegasus_StringRep_h #ifndef _Pegasus_StringRep_h
 #define _Pegasus_StringRep_h #define _Pegasus_StringRep_h
  
 #include <Pegasus/Common/Atomic.h>  #include <Pegasus/Common/Config.h>
   #include <Pegasus/Common/AtomicInt.h>
   #include <Pegasus/Common/CommonUTF.h>
   #include <new>
  
 PEGASUS_NAMESPACE_BEGIN PEGASUS_NAMESPACE_BEGIN
  
 struct StringRep  struct PEGASUS_COMMON_LINKAGE StringRep
 { {
     StringRep();     StringRep();
  
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     static StringRep* create(const char* data, size_t size);     static StringRep* create(const char* data, size_t size);
  
     static StringRep* createASCII7(const char* data, size_t size);      static StringRep* copyOnWrite(StringRep* rep);
   
     static StringRep* copy_on_write(StringRep* rep);  
  
     static Uint32 length(const Uint16* str);     static Uint32 length(const Uint16* str);
  
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     static void unref(const StringRep* rep);     static void unref(const StringRep* rep);
  
     static StringRep _empty_rep;      static StringRep _emptyRep;
  
       // Number of characters in this string, excluding the null terminator.
     size_t size;     size_t size;
   
       // Number of characters this representation has room for. This is
       // greater or equal to size.
     size_t cap;     size_t cap;
     Atomic refs;  
       // Number of string refering to this StringRep (1, 2, etc).
       AtomicInt refs;
   
       // The first character in the string. Extra space is allocated off the
       // end of this structure for additional characters.
     Uint16 data[1];     Uint16 data[1];
 }; };
  
 inline void StringRep::free(StringRep* rep) inline void StringRep::free(StringRep* rep)
 { {
     Atomic_destroy(&rep->refs);      rep->refs.~AtomicInt();
     ::operator delete(rep);     ::operator delete(rep);
 } }
  
 inline StringRep::StringRep() : size(0), cap(0)  inline StringRep::StringRep() : size(0), cap(0), refs(2)
 { {
     // Only called on _empty_rep.      // Only called on _emptyRep. We set the reference count to two to
     Atomic_create(&refs, 99);      // keep a String from modifying it (if the reference count were one,
       // a string would think it was the sole owner of the StringRep object).
     data[0] = 0;     data[0] = 0;
 } }
  
 inline StringRep::~StringRep() inline StringRep::~StringRep()
 { {
     // Only called on _empty_rep.      // Only called on _emptyRep.
     Atomic_destroy(&refs);  
 } }
  
 inline void StringRep::ref(const StringRep* rep) inline void StringRep::ref(const StringRep* rep)
 { {
     if (rep != &StringRep::_empty_rep)      if (rep != &StringRep::_emptyRep)
         Atomic_inc(&((StringRep*)rep)->refs);          ((StringRep*)rep)->refs++;
 } }
  
 inline void StringRep::unref(const StringRep* rep) inline void StringRep::unref(const StringRep* rep)
 { {
     if (rep != &StringRep::_empty_rep &&      if (rep != &StringRep::_emptyRep &&
         Atomic_dec_and_test(&((StringRep*)rep)->refs))          ((StringRep*)rep)->refs.decAndTestIfZero())
         StringRep::free((StringRep*)rep);         StringRep::free((StringRep*)rep);
 } }
  
 PEGASUS_COMMON_LINKAGE void String_throw_out_of_bounds();  PEGASUS_COMMON_LINKAGE void StringThrowOutOfBounds();
  
 #ifdef PEGASUS_STRING_NO_THROW  PEGASUS_COMMON_LINKAGE void StringAppendCharAux(StringRep*& _rep);
 # define _check_bounds(ARG1, ARG2) /* empty */  
 #else  PEGASUS_COMMON_LINKAGE Boolean StringEqualNoCase(
 inline void _check_bounds(size_t index, size_t size)      const String& s1, const String& s2);
   
   PEGASUS_COMMON_LINKAGE Uint32 StringFindAux(
       const StringRep* _rep, const Char16* s, Uint32 n);
   
   inline void _checkBounds(size_t index, size_t size)
 { {
     if (index > size)     if (index > size)
         String_throw_out_of_bounds();      {
           StringThrowOutOfBounds();
       }
   }
   
   template<class P, class Q>
   static void _copy(P* p, const Q* q, size_t n)
   {
       // The following employs loop unrolling for efficiency. Please do not
       // eliminate.
   
       while (n >= 8)
       {
           p[0] = q[0];
           p[1] = q[1];
           p[2] = q[2];
           p[3] = q[3];
           p[4] = q[4];
           p[5] = q[5];
           p[6] = q[6];
           p[7] = q[7];
           p += 8;
           q += 8;
           n -= 8;
       }
   
       while (n >= 4)
       {
           p[0] = q[0];
           p[1] = q[1];
           p[2] = q[2];
           p[3] = q[3];
           p += 4;
           q += 4;
           n -= 4;
       }
   
       while (n--)
           *p++ = *q++;
   }
   
   static size_t _copyFromUTF8(
       Uint16* dest,
       const char* src,
       size_t n,
       size_t& utf8_error_index)
   {
       Uint16* p = dest;
       const Uint8* q = (const Uint8*)src;
   
       // Process leading 7-bit ASCII characters (to avoid UTF8 overhead later).
       // Use loop-unrolling.
   
       while ( (n >=8) && ((q[0]|q[1]|q[2]|q[3]|q[4]|q[5]|q[6]|q[7]) & 0x80) == 0)
       {
           p[0] = q[0];
           p[1] = q[1];
           p[2] = q[2];
           p[3] = q[3];
           p[4] = q[4];
           p[5] = q[5];
           p[6] = q[6];
           p[7] = q[7];
           p += 8;
           q += 8;
           n -= 8;
       }
   
       while ((n >=4) && ((q[0]|q[1]|q[2]|q[3]) & 0x80) == 0)
       {
           p[0] = q[0];
           p[1] = q[1];
           p[2] = q[2];
           p[3] = q[3];
           p += 4;
           q += 4;
           n -= 4;
       }
   
       switch (n)
       {
           case 0:
               return p - dest;
           case 1:
               if (q[0] < 128)
               {
                   p[0] = q[0];
                   return p + 1 - dest;
               }
               break;
           case 2:
               if (((q[0]|q[1]) & 0x80) == 0)
               {
                   p[0] = q[0];
                   p[1] = q[1];
                   return p + 2 - dest;
               }
               break;
           case 3:
               if (((q[0]|q[1]|q[2]) & 0x80) == 0)
               {
                   p[0] = q[0];
                   p[1] = q[1];
                   p[2] = q[2];
                   return p + 3 - dest;
               }
               break;
       }
   
       // Process remaining characters.
   
       while (n)
       {
           // Optimize for 7-bit ASCII case.
   
           if (*q < 128)
           {
               *p++ = *q++;
               n--;
           }
           else
           {
               Uint8 c = UTF_8_COUNT_TRAIL_BYTES(*q) + 1;
   
               if (c > n || !isValid_U8(q, c) ||
                   UTF8toUTF16(&q, q + c, &p, p + n) != 0)
               {
                   utf8_error_index = q - (const Uint8*)src;
                   return size_t(-1);
               }
   
               n -= c;
 } }
       }
   
       return p - dest;
   }
   
   static inline size_t _convert(
       Uint16* p, const char* q, size_t n, size_t& utf8_error_index)
   {
   #ifdef PEGASUS_STRING_NO_UTF8
       _copy(p, q, n);
       return n;
   #else
       return _copyFromUTF8(p, q, n, utf8_error_index);
 #endif #endif
   }
  
 PEGASUS_NAMESPACE_END PEGASUS_NAMESPACE_END
  

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