tstream.cc

   1 #include <fstream.h>
   2 #include "tex.hh"
   3 #include "tstream.hh"
   4 #include "debug.hh"
   5
   6 Tex_stream::Tex_stream(String filename)
   7 {
   8
   9     os = new ofstream(filename);
  10     if (!*os)
  11         error("can't open " + filename);
  12     nest_level = 0;
  13     outputting_comment=false;
  14 }
  15
  16 Tex_stream::~Tex_stream()
  17 {
  18     assert(nest_level == 0);
  19     delete os;
  20 }
  21
  22 // print string. don't forget indent.
  23 Tex_stream &
  24 Tex_stream::operator<<(String s)
  25 {
  26     for (const char *cp = s; *cp; cp++) {
  27         if (outputting_comment) {
  28             *os << *cp;
  29             if (*cp == '\n') {
  30                 outputting_comment=false;
  31
  32             }
  33             continue;
  34         }
  35         switch(*cp)
  36             {
  37             case '%':
  38                 outputting_comment = true;
  39                 *os << *cp;
  40                 break;
  41             case '{':
  42                 nest_level++;
  43                 *os << *cp;
  44                 break;
  45             case '}':
  46                 nest_level--;
  47                 *os << *cp;
  48                 assert (nest_level >= 0);
  49                 /* FALL THROUGH */
  50
  51             case '\n':
  52                 *os << "%\n";
  53                 *os << String(' ', nest_level);
  54                 break;
  55             default:
  56                 *os << *cp;
  57                 break;
  58             }
  59     }
  60     return *this;
  61 }
  62
  63
  64 /****************************************************************/