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Diff for /pegasus/src/Pegasus/Common/HashTable.cpp between version 1.10.2.1 and 1.21.2.1

version 1.10.2.1, 2001/12/03 02:28:44 version 1.21.2.1, 2006/02/10 16:09:36
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 //%/////////////////////////////////////////////////////////////////////////////  //%2006////////////////////////////////////////////////////////////////////////
 // //
 // Copyright (c) 2000, 2001 The Open group, BMC Software, Tivoli Systems, IBM  // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
   // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
   // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
   // IBM Corp.; EMC Corporation, The Open Group.
   // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
   // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
   // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
   // EMC Corporation; VERITAS Software Corporation; The Open Group.
   // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
   // EMC Corporation; Symantec Corporation; The Open Group.
 // //
 // Permission is hereby granted, free of charge, to any person obtaining a copy // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to // of this software and associated documentation files (the "Software"), to
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 //////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////
 // //
 // Hash()  // Hash routines
 // //
 //////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////
  
 Uint32 HashFunc<String>::hash(const String& str) Uint32 HashFunc<String>::hash(const String& str)
 { {
       // Caution: do not change this hash algorithm since hash codes are stored
       // in the repository. Any change here will break backwards compatibility
       // of the repository.
   
     Uint32 h = 0;     Uint32 h = 0;
       const Uint16* p = (const Uint16*)str.getChar16Data();
       Uint32 n = str.size();
  
     for (Uint32 i = 0, n = str.size(); i < n; i++)      while (n--)
         h = 5 * h + str[i];          h = 5 * h + *p++;
   
       return h;
   }
   
   static const Uint8 _toLowerTable[256] =
   {
       0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,
       0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
       0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,
       0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
       0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,
       0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,
       0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,
       0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,
       0x40,0x61,0x62,0x63,0x64,0x65,0x66,0x67,
       0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
       0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,
       0x78,0x79,0x7A,0x5B,0x5C,0x5D,0x5E,0x5F,
       0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,
       0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
       0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,
       0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,
       0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,
       0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
       0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,
       0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
       0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,
       0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
       0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,
       0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
       0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,
       0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,
       0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,
       0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
       0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,
       0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
       0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,
       0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,
   };
   
   Uint32 HashLowerCaseFunc::hash(const String& str)
   {
       Uint16* p = (Uint16*)str.getChar16Data();
       Uint32 h = 0;
       Uint32 n = str.size();
   
       while (n >= 4)
       {
           h = ((h << 9) | (h >> 23)) ^ (Uint32)_toLowerTable[p[0] & 0x007F];
           h = ((h << 9) | (h >> 23)) ^ (Uint32)_toLowerTable[p[1] & 0x007F];
           h = ((h << 9) | (h >> 23)) ^ (Uint32)_toLowerTable[p[2] & 0x007F];
           h = ((h << 9) | (h >> 23)) ^ (Uint32)_toLowerTable[p[3] & 0x007F];
           n -= 4;
           p += 4;
       }
   
       while (*p)
           h = ((h << 9) | (h >> 23)) ^ (Uint32)_toLowerTable[*p++ & 0x007F];
  
     return h;     return h;
 } }
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 _HashTableRep::~_HashTableRep() _HashTableRep::~_HashTableRep()
 { {
     clear();     clear();
       if (_chains)
     delete [] _chains;     delete [] _chains;
 } }
  
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     Uint32 hashCode,     Uint32 hashCode,
     const void* key) const     const void* key) const
 { {
   #ifdef PEGASUS_OS_VMS
   
   // This is to prevent a crash when the hash
   //  code hasn't been initialized!
   
       if (_numChains == 0)
       {
         return 0;
       }
   #endif
     Uint32 i = hashCode % _numChains;     Uint32 i = hashCode % _numChains;
  
     for (_BucketBase* bucket = _chains[i]; bucket; bucket = bucket->next)     for (_BucketBase* bucket = _chains[i]; bucket; bucket = bucket->next)
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 Boolean _HashTableRep::remove(Uint32 hashCode, const void* key) Boolean _HashTableRep::remove(Uint32 hashCode, const void* key)
 { {
     for (Uint32 i = 0; i < _numChains; i++)      Uint32 i = hashCode % _numChains;
     {  
         _BucketBase* prev = 0;         _BucketBase* prev = 0;
  
         for (_BucketBase* bucket = _chains[i]; bucket; bucket = bucket->next)         for (_BucketBase* bucket = _chains[i]; bucket; bucket = bucket->next)
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             }             }
             prev = bucket;             prev = bucket;
         }         }
     }  
  
     return false;     return false;
 } }

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