odk/examples/DevelopersGuide/ProfUNO/CppBinding/string_samples.cxx

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  35
  36 #include <stdio.h>
  37
  38 #include <sal/main.h>
  39
  40 #include <rtl/ustrbuf.hxx>
  41 #include <rtl/string.hxx>
  42
  43 using rtl::OUString;
  44 using rtl::OUStringBuffer;
  45 using rtl::OString;
  46
  47 SAL_IMPLEMENT_MAIN()
  48 {
  49     // string concatination
  50
  51     sal_Int32 n = 42;
  52     double pi = 3.14159;
  53
  54     // give it an initial size, should be a good guess.
  55     // stringbuffer extends if necessary
  56     OUStringBuffer buf( 128 );
  57
  58     // append an ascii string
  59     buf.append( "pi ( here " );
  60
  61     // numbers can be simply appended
  62     buf.append( pi );
  63
  64     // lets the compiler count the stringlength, so this is more efficient than
  65     // the above appendAscii call, where length of the string must be calculated at
  66     // runtime
  67     buf.append( " ) multiplied with " );
  68     buf.append( n );
  69     buf.append( " gives " );
  70     buf.append( (double)( n * pi ) );
  71     buf.append( "." );
  72
  73     // now transfer the buffer into the string.
  74     // afterwards buffer is empty and may be reused again !
  75     OUString string = buf.makeStringAndClear();
  76
  77     // I could of course also used the OStringBuffer directly
  78     OString oString = rtl::OUStringToOString( string , RTL_TEXTENCODING_ASCII_US );
  79
  80     // just to print something
  81     printf( "%s\n" ,oString.getStr() );
  82
  83     return 0;
  84 }
  85
  86
  87 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */