xpcom/string/src/nsTString.cpp

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   4  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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  20  * IBM Corporation. All Rights Reserved.
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  22  * Contributor(s):
  23  *   Darin Fisher <darin@meer.net>
  24  *   Johnny Stenback <jst@mozilla.jstenback.com>
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  26  * Alternatively, the contents of this file may be used under the terms of
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  38  * ***** END LICENSE BLOCK ***** */
  39
  40 NS_COM nsTAdoptingString_CharT&
  41 nsTAdoptingString_CharT::operator=( const self_type& str )
  42   {
  43     // This'll violate the constness of this argument, that's just
  44     // the nature of this class...
  45     self_type* mutable_str = const_cast<self_type*>(&str);
  46
  47     if (str.mFlags & F_OWNED)
  48       {
  49         // We want to do what Adopt() does, but without actually incrementing
  50         // the Adopt count.  Note that we can be a little more straightforward
  51         // about this than Adopt() is, because we know that str.mData is
  52         // non-null.  Should we be able to assert that str is not void here?
  53         NS_ASSERTION(str.mData, "String with null mData?");
  54         Finalize();
  55         mData = str.mData;
  56         mLength = str.mLength;
  57         SetDataFlags(F_TERMINATED | F_OWNED);
  58
  59         // Make str forget the buffer we just took ownership of.
  60         new (mutable_str) self_type();
  61       }
  62     else
  63       {
  64         Assign(str);
  65
  66         mutable_str->Truncate();
  67       }
  68
  69     return *this;
  70   }
  71
  72 nsTFixedString_CharT::nsTFixedString_CharT( char_type* data, size_type storageSize )
  73   : string_type(data, PRUint32(char_traits::length(data)), F_TERMINATED | F_FIXED | F_CLASS_FIXED)
  74     , mFixedCapacity(storageSize - 1)
  75     , mFixedBuf(data)
  76 {}
  77
  78 nsTFixedString_CharT::nsTFixedString_CharT( char_type* data, size_type storageSize, size_type length )
  79   : string_type(data, length, F_TERMINATED | F_FIXED | F_CLASS_FIXED)
  80     , mFixedCapacity(storageSize - 1)
  81     , mFixedBuf(data)
  82 {
  83   // null-terminate
  84   mFixedBuf[length] = char_type(0);
  85 }