src/tex-stream.cc

   1 /*
   2   tex-stream.cc -- implement Tex_stream
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include <fstream.h>
  10 #include <time.h>
  11
  12 #include "tex.hh"
  13 #include "main.hh"
  14 #include "tex-stream.hh"
  15 #include "debug.hh"
  16
  17 Tex_stream::Tex_stream(String filename)
  18 {
  19     os = new ofstream(filename);
  20     if (!*os)
  21         error("can't open `" + filename+"\'");
  22     nest_level = 0;
  23     outputting_comment=false;
  24     header();
  25 }
  26 void
  27 Tex_stream::header()
  28 {
  29     *os << "% Creator: " << get_version();
  30     *os << "% Automatically generated, at ";
  31     time_t t(time(0));
  32     *os << ctime(&t);
  33 }
  34 Tex_stream::~Tex_stream()
  35 {
  36     delete os;
  37     assert(nest_level == 0);
  38 }
  39
  40 // print string. don't forget indent.
  41 Tex_stream &
  42 Tex_stream::operator<<(String s)
  43 {
  44
  45     for (const char *cp = s; *cp; cp++) {
  46         if (outputting_comment) {
  47             *os << *cp;
  48             if (*cp == '\n') {
  49                 outputting_comment=false;
  50
  51             }
  52             continue;
  53         }
  54         switch(*cp)
  55             {
  56             case '%':
  57                 outputting_comment = true;
  58                 *os << *cp;
  59                 break;
  60             case '{':
  61                 nest_level++;
  62                 *os << *cp;
  63                 break;
  64             case '}':
  65                 nest_level--;
  66                 *os << *cp;
  67
  68                 if (nest_level < 0) {
  69                     delete os;  // we want to see the remains.
  70                     assert(nest_level>=0);
  71                 }
  72                 /* FALLTHROUGH */
  73
  74             case '\n':
  75                 *os << "%\n";
  76                 *os << String(' ', nest_level);
  77                 break;
  78             default:
  79                 *os << *cp;
  80                 break;
  81             }
  82     }
  83     return *this;
  84 }
  85
  86
  87 /* *************************************************************** */