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

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   2  *
   3  *  $RCSfile: string_samples.cxx,v $
   4  *
   5  *  $Revision: 1.5 $
   6  *
   7  *  last change: $Author: kz $ $Date: 2006-11-06 15:03:32 $
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  12  *  Copyright (c) 2003 by Sun Microsystems, Inc.
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  40
  41 #include <stdio.h>
  42
  43 #include <rtl/ustrbuf.hxx>
  44 #include <rtl/string.hxx>
  45
  46 using rtl::OUString;
  47 using rtl::OUStringBuffer;
  48 using rtl::OString;
  49
  50 int main( int argc, char * argv [] )
  51 {
  52     // string concatination
  53
  54     sal_Int32 n = 42;
  55     double pi = 3.14159;
  56
  57     // give it an initial size, should be a good guess.
  58     // stringbuffer extends if necessary
  59     OUStringBuffer buf( 128 );
  60
  61     // append an ascii string
  62     buf.appendAscii( "pi ( here " );
  63
  64     // numbers can be simply appended
  65     buf.append( pi );
  66
  67     // lets the compiler count the stringlength, so this is more efficient than
  68     // the above appendAscii call, where length of the string must be calculated at
  69     // runtime
  70     buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" ) multiplied with " ) );
  71     buf.append( n );
  72     buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" gives ") );
  73     buf.append( (double)( n * pi ) );
  74     buf.appendAscii( RTL_CONSTASCII_STRINGPARAM( "." ) );
  75
  76     // now transfer the buffer into the string.
  77     // afterwards buffer is empty and may be reused again !
  78     OUString string = buf.makeStringAndClear();
  79
  80     // I could of course also used the OStringBuffer directly
  81     OString oString = rtl::OUStringToOString( string , RTL_TEXTENCODING_ASCII_US );
  82
  83     // just to print something
  84     printf( "%s\n" ,oString.getStr() );
  85
  86     return 0;
  87 }
  88