flower/dstream.cc

   1 /*
   2   dstream.cc -- implement Dstream
   3
   4   source file of the Flower Library
   5
   6   (c) 1996, 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include <fstream.h>
  10 #include "dictionary-iter.hh"
  11 #include "dstream.hh"
  12
  13 #include "text-db.hh"
  14 #include "string-convert.hh"
  15 #include "rational.hh"
  16
  17 /// amount of indentation for each level.
  18 const int INDTAB = 2;
  19
  20 /*
  21   should use Regexp library.
  22   */
  23 static String
  24 strip_pretty (String pretty_str)
  25 {
  26   int i = pretty_str.index_i ('(');
  27   if (i>=0)
  28     pretty_str = pretty_str.left_str (i);
  29
  30   int l = pretty_str.index_last_i (' '); // strip until last ' '
  31   if (l>=0)
  32     pretty_str = pretty_str.nomid_str (0,l+1);
  33   return pretty_str;
  34 }
  35
  36 static String
  37 strip_member (String pret)
  38 {
  39   int l=pret.index_last_i (':')-1;
  40   if (l>=0)
  41     pret = pret.left_str (l);
  42   return pret;
  43 }
  44
  45 Dstream&
  46 Dstream::identify_as (String name)
  47 {
  48   if (!os_l_)
  49     return *this;
  50
  51   String mem (strip_pretty (name));
  52   String cl (strip_member (mem));
  53   String idx = cl;
  54
  55   if (silent_dict_p_->elem_b (mem))
  56     idx  = mem;
  57   else if (silent_dict_p_->elem_b (cl))
  58     idx = cl;
  59   else
  60     {
  61       (*silent_dict_p_)[idx] = default_silence_b_;
  62     }
  63   local_silence_b_ = (*silent_dict_p_)[idx];
  64   if (current_classname_str_ != idx && !local_silence_b_)
  65     {
  66       current_classname_str_=idx;
  67       if (!(*silent_dict_p_)["Dstream"])
  68         *os_l_ << "[" << current_classname_str_ << ":]"; // messy.
  69     }
  70   return *this;
  71 }
  72
  73 bool
  74 Dstream::silent_b (String s) const
  75 {
  76   if (!silent_dict_p_->elem_b (s))
  77     return false;
  78   return (*silent_dict_p_)[s];
  79 }
  80
  81 Dstream &
  82 Dstream::operator<<(void const *v_l)
  83 {
  84   output (String_convert::pointer_str (v_l));
  85   return *this;
  86 }
  87
  88 Dstream &
  89 Dstream::operator <<(String s)
  90 {
  91   output (s);
  92   return *this;
  93 }
  94
  95 Dstream &
  96 Dstream::operator <<(const char * s)
  97 {
  98   output (String (s));
  99   return *this;
 100 }
 101
 102 Dstream &
 103 Dstream::operator <<(char c)
 104 {
 105   output (to_str (c));
 106   return *this;
 107 }
 108
 109 Dstream&
 110 Dstream::operator << (Real r)
 111 {
 112   output (to_str  (r));
 113   return *this;
 114 }
 115 Dstream &
 116 Dstream::operator <<(Rational c)
 117 {
 118   output (c.str ());
 119   return *this;
 120 }
 121 Dstream &
 122 Dstream::operator <<(int i)
 123 {
 124   output (to_str(i));
 125   return *this;
 126 }
 127
 128 void
 129 Dstream::output (String s)
 130 {
 131   if (local_silence_b_|| !os_l_)
 132     return ;
 133
 134   for (char const *cp = s.ch_C (); *cp; cp++)
 135     switch (*cp)
 136       {
 137       case '{':
 138       case '[':
 139       case '(': indent_level_i_ += INDTAB;
 140         *os_l_ << *cp;
 141         break;
 142
 143       case ')':
 144       case ']':
 145       case '}':
 146         indent_level_i_ -= INDTAB;
 147         *os_l_ << *cp           ;
 148
 149         assert  (indent_level_i_>=0) ;
 150         break;
 151
 152       case '\n':
 153         *os_l_ << '\n' << to_str (' ', indent_level_i_) << flush;
 154         break;
 155       default:
 156         *os_l_ << *cp;
 157         break;
 158       }
 159   return ;
 160 }
 161
 162
 163 Dstream::Dstream (ostream *r, char const * cfg_nm)
 164 {
 165   os_l_ = r;
 166   silent_dict_p_ = new Dictionary<bool>;
 167   default_silence_b_ = false;
 168   indent_level_i_ = 0;
 169   if (!os_l_)
 170     return;
 171
 172   char const * fn =cfg_nm ? cfg_nm : ".dstreamrc";
 173   {
 174     ifstream ifs (fn);  // can 't open
 175     if (!ifs)
 176       return;
 177   }
 178
 179   Text_db cfg (fn);
 180   while (!cfg.eof_b ()){
 181     Text_record  r (cfg++);
 182     if (r.size() != 2)
 183       {
 184         r.message (_ ("not enough fields in Dstream init"));
 185         continue;
 186       }
 187     (*silent_dict_p_)[r[0]] = r[1] == "1";
 188   }
 189
 190   if ((*silent_dict_p_).elem_b ("Dstream_default_silence"))
 191     default_silence_b_ = (*silent_dict_p_)["Dstream_default_silence"];
 192 }
 193
 194
 195 Dstream::~Dstream()
 196 {
 197   delete silent_dict_p_;
 198   assert (!indent_level_i_) ;
 199 }
 200
 201 void
 202 Dstream::clear_silence()
 203 {
 204   for (Dictionary_iter<bool> i (*silent_dict_p_); i.ok(); i++)
 205     {
 206       i.val_ref() = false;
 207     }
 208 }
 209