lily/ly-module.cc

   1 /*
   2 ly-module.cc --  implement guile module stuff.
   3
   4 source file of the GNU LilyPond music typesetter
   5
   6 (c) 2002--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "string.hh"
  11 #include "lily-guile.hh"
  12 #include "ly-modules.hh"
  13 #include "protected-scm.hh"
  14
  15 #define FUNC_NAME __FUNCTION__
  16
  17 static int module_count;
  18
  19 void
  20 ly_init_anonymous_module (void * data)
  21 {
  22   scm_c_use_module ("lily");
  23 }
  24
  25 Protected_scm anon_modules;
  26
  27 SCM
  28 ly_make_anonymous_module ()
  29 {
  30   String s = "*anonymous-ly-" + to_string (module_count++) +  "*";
  31   SCM mod = scm_c_define_module (s.to_str0(), ly_init_anonymous_module, 0);
  32
  33   anon_modules = scm_cons (mod, anon_modules);
  34   return mod;
  35 }
  36
  37 void
  38 ly_clear_anonymous_modules ()
  39 {
  40   SCM s = anon_modules;
  41   anon_modules = SCM_EOL;
  42
  43   for (; gh_pair_p (s) ; s = gh_cdr (s))
  44     {
  45       scm_vector_fill_x (SCM_MODULE_OBARRAY(gh_car(s)), SCM_EOL);
  46     }
  47 }
  48
  49 #define FUNC_NAME __FUNCTION__
  50
  51 void
  52 ly_copy_module_variables (SCM dest, SCM src)
  53 {
  54   SCM_VALIDATE_MODULE (1, src);
  55
  56   SCM obarr= SCM_MODULE_OBARRAY(src);
  57   SCM syms = SCM_EOL;
  58
  59   for (int i = 0;  i < SCM_VECTOR_LENGTH (obarr); i++)
  60     {
  61       for( SCM s = scm_vector_ref(obarr, SCM_MAKINUM (i));
  62            gh_pair_p (s); s = gh_cdr (s))
  63         {
  64           scm_module_define (dest, gh_caar (s), scm_variable_ref (gh_cdar(s)));
  65         }
  66     }
  67 }
  68
  69 SCM
  70 ly_module_symbols (SCM mod)
  71 {
  72   SCM_VALIDATE_MODULE (1, mod);
  73
  74   SCM obarr= SCM_MODULE_OBARRAY(mod);
  75   SCM syms = SCM_EOL;
  76
  77   for (int i = 0;  i < SCM_VECTOR_LENGTH (obarr); i++)
  78     {
  79       for( SCM s = scm_vector_ref(obarr, SCM_MAKINUM (i));
  80            gh_pair_p (s); s = gh_cdr (s))
  81         {
  82           syms = scm_cons (gh_caar (s), syms);
  83         }
  84     }
  85   return syms;
  86 }
  87
  88
  89
  90 SCM
  91 ly_module_to_alist (SCM mod)
  92 {
  93   SCM_VALIDATE_MODULE (1, mod);
  94
  95
  96   SCM obarr= SCM_MODULE_OBARRAY(mod);
  97   SCM alist = SCM_EOL;
  98
  99   for (int i = 0;  i < SCM_VECTOR_LENGTH (obarr); i++)
 100     {
 101       for( SCM s = scm_vector_ref(obarr, SCM_MAKINUM (i));
 102            gh_pair_p (s); s = gh_cdr (s))
 103         {
 104           alist = scm_acons (gh_caar (s), scm_variable_ref (gh_cdar (s)),
 105                                                             alist);
 106         }
 107     }
 108   return alist;
 109 }
 110
 111 /*
 112   Lookup SYM, but don't give error when it is not defined.
 113  */
 114 SCM
 115 ly_module_lookup (SCM module, SCM sym)
 116 {
 117 #define FUNC_NAME __FUNCTION__
 118   SCM_VALIDATE_MODULE (1, module);
 119
 120   return scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_F);
 121 }
 122
 123 SCM export_function ;
 124
 125 void
 126 ly_export (SCM module, SCM namelist)
 127 {
 128   if (!export_function)
 129     {
 130       export_function = scm_permanent_object (scm_c_lookup ("module-export!"));
 131     }
 132
 133   scm_call_2 (SCM_VARIABLE_REF (export_function),
 134               module, namelist);
 135 }
 136
 137 void
 138 ly_reexport_module (SCM mod)
 139 {
 140   ly_export (mod, ly_module_symbols (mod));
 141 }