lily/input-smob.cc

   1 /*
   2   input-smob.cc --  implement Input smob
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "input.hh"
  11 #include "input-smob.hh"
  12 #include "string.hh"
  13 #include "ly-smobs.icc"
  14
  15 static long input_tag;
  16
  17 static
  18 SCM mark_smob (SCM)
  19 {
  20   return SCM_EOL;
  21 }
  22
  23 static int
  24 print_smob (SCM s, SCM port, scm_print_state *)
  25 {
  26   String str = "#<location " +  unsmob_input (s)->location_str () + ">";
  27   scm_puts (str.ch_C (), port);
  28   return 1;
  29 }
  30
  31 static
  32 scm_sizet free_smob (SCM s)
  33 {
  34   delete unsmob_input (s);
  35   return 0;
  36 }
  37
  38 SCM
  39 ly_input_p (SCM x)
  40 {
  41   return unsmob_input (x) ? SCM_BOOL_T : SCM_BOOL_F ;
  42 }
  43
  44 static
  45 void start_input_smobs ()
  46 {
  47   input_tag
  48     = scm_make_smob_type_mfpe ("input", 0,
  49                                mark_smob, free_smob,
  50                                print_smob, 0);
  51   scm_make_gsubr ("ly-input-location?", 1, 0, 0, (Scheme_function_unknown)ly_input_p);
  52
  53 }
  54
  55 SCM
  56 make_input (Input ip)
  57 {
  58   Input * nip =  new Input (ip);
  59   SCM z;
  60
  61   SCM_NEWCELL (z);
  62   SCM_SETCAR (z, (SCM)input_tag);
  63   SCM_SETCDR (z, (SCM)nip);
  64                                 // fixme: done_malloc
  65   return z;
  66 }
  67
  68 Input *
  69 unsmob_input (SCM s)
  70 {
  71   if (SCM_IMP (s))
  72     return 0;
  73   if ((long)SCM_CAR (s) == input_tag) // ugh.
  74     return (Input*) SCM_CDR (s);
  75   else
  76     return 0;
  77 }
  78
  79
  80 ADD_SCM_INIT_FUNC (input, start_input_smobs);
  81
  82
  83 Input dummy_input_global;
  84