flower/include/dstream.hh

   1 /*
   2   dstream.hh -- declare Dstream
   3
   4   source file of the Flower Library
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #ifndef DSTREAM_HH
  10 #define DSTREAM_HH
  11
  12 #include "string.hh"
  13
  14
  15 const char eol= '\n';
  16
  17 /**  Debug stream.
  18    a class for providing debug output of nested structures,
  19    with indents according to \{\}()[].
  20
  21    One can turn on and off specific messages using the Assoc silent.
  22    This can be done automatically:
  23
  24    #define DEBUG  dstream_.identify_as (__PRETTY_FUNCTION__)
  25
  26    DEBUG << "a message\n";
  27
  28    Init for the class names which should be silent can be given in a rc file.
  29
  30    TODO:
  31    make a baseclass for indentable streams.
  32   */
  33 class Dstream
  34 {
  35   ostream *os_l_;
  36   int indent_level_i_;
  37   bool local_silence_b_;
  38   bool default_silence_b_;
  39   String current_classname_str_;
  40   void output (String s);
  41   Dictionary<bool> *silent_dict_p_;
  42
  43 public:
  44   void clear_silence();
  45   bool silent_b (String) const;
  46
  47   /**
  48      if rcfile == 0, then do not read any rc file.
  49   */
  50   Dstream (ostream *r, char const * rcfile);
  51   virtual ~Dstream();
  52   Dstream &identify_as (String s);
  53
  54
  55   Dstream &operator << (String);
  56   Dstream &operator << (Real);
  57   Dstream &operator << (int);
  58   Dstream &operator << (Rational);
  59   Dstream &operator << (char);
  60   /**
  61      Output memory locations.
  62   */
  63   Dstream &operator << (void const *);
  64   Dstream &operator << (char const *);
  65 };
  66 #endif
  67