/*
- ly-module.cc -- implement guile module stuff.
-
+ ly-module.cc -- implement guile module stuff.
+
source file of the GNU LilyPond music typesetter
-
- (c) 2002--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2002--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "string.hh"
#include "lily-guile.hh"
-#include "ly-module.hh"
-#include "protected-scm.hh"
+#include "warn.hh"
+#include "main.hh"
+#include "string.hh"
#define FUNC_NAME __FUNCTION__
static int module_count;
void
-ly_init_anonymous_module (void * data)
+ly_init_anonymous_module (void *data)
{
(void) data;
- scm_c_use_module ("lily");
}
SCM
-ly_make_anonymous_module ()
+ly_make_anonymous_module (bool safe)
{
- String s = "*anonymous-ly-" + to_string (module_count++) + "*";
- SCM mod = scm_c_define_module (s.to_str0(), ly_init_anonymous_module, 0);
+ SCM mod = SCM_EOL;
+ if (!safe)
+ {
+ String s = "*anonymous-ly-" + to_string (module_count++) + "*";
+ mod = scm_c_define_module (s.to_str0 (), ly_init_anonymous_module, 0);
+ ly_use_module (mod, global_lily_module);
+ }
+ else
+ {
+ SCM proc = ly_lily_module_constant ("make-safe-lilypond-module");
+ mod = scm_call_0 (proc);
+ }
return mod;
}
+SCM
+ly_use_module (SCM mod, SCM used)
+{
+ SCM expr
+ = scm_list_3 (ly_symbol2scm ("module-use!"),
+ mod,
+ scm_list_2 (ly_symbol2scm ("module-public-interface"),
+ used));
+
+ return scm_eval (expr, global_lily_module);
+}
+
#define FUNC_NAME __FUNCTION__
static SCM
-ly_module_define (void *closure, SCM key, SCM val, SCM result)
+module_define_closure_func (void *closure, SCM key, SCM val, SCM result)
{
(void) result;
SCM module = (SCM) closure;
- scm_module_define (module, key, scm_variable_ref (val));
+ if (scm_variable_bound_p (val) == SCM_BOOL_T)
+ scm_module_define (module, key, scm_variable_ref (val));
return SCM_EOL;
}
/* Ugh signature of scm_internal_hash_fold () is inaccurate. */
-typedef SCM (*Hash_cl_func)();
+typedef SCM (*Hash_cl_func) ();
-void
-ly_import_module (SCM dest, SCM src)
+/*
+ If a variable in changed in SRC, we DEST doesn't see the
+ definitions.
+*/
+LY_DEFINE (ly_module_copy, "ly:module-copy",
+ 2, 0, 0, (SCM dest, SCM src),
+ "Copy all bindings from module SRC into DEST.")
{
SCM_VALIDATE_MODULE (1, src);
- scm_internal_hash_fold ((Hash_cl_func) &ly_module_define, (void*) dest,
+ scm_internal_hash_fold ((Hash_cl_func) & module_define_closure_func,
+ (void *) dest,
SCM_EOL, SCM_MODULE_OBARRAY (src));
+ return SCM_UNSPECIFIED;
}
static SCM
ly_module_symbols (SCM mod)
{
SCM_VALIDATE_MODULE (1, mod);
-
- SCM obarr= SCM_MODULE_OBARRAY (mod);
- return scm_internal_hash_fold ((Hash_cl_func) &accumulate_symbol,
- NULL, SCM_EOL, obarr);
+
+ SCM obarr = SCM_MODULE_OBARRAY (mod);
+ return scm_internal_hash_fold ((Hash_cl_func) & accumulate_symbol,
+ NULL, SCM_EOL, obarr);
}
static SCM
entry_to_alist (void *closure, SCM key, SCM val, SCM result)
{
(void) closure;
- return scm_cons (scm_cons (key, scm_variable_ref (val)), result);
+ if (scm_variable_bound_p (val) == SCM_BOOL_T)
+ {
+ return scm_cons (scm_cons (key, scm_variable_ref (val)), result);
+ }
+ else
+ {
+ programming_error ("Unbound variable in module.");
+ return result;
+ }
}
-SCM
-ly_module_to_alist (SCM mod)
+LY_DEFINE (ly_module2alist, "ly:module->alist",
+ 1, 0, 0, (SCM mod),
+ "Dump the contents of module @var{mod} as an alist.")
{
SCM_VALIDATE_MODULE (1, mod);
-
-
- SCM obarr= SCM_MODULE_OBARRAY (mod);
+ SCM obarr = SCM_MODULE_OBARRAY (mod);
- return scm_internal_hash_fold ((Hash_cl_func) &entry_to_alist, NULL, SCM_EOL, obarr);
+ return scm_internal_hash_fold ((Hash_cl_func) & entry_to_alist, NULL, SCM_EOL, obarr);
}
/* Lookup SYM, but don't give error when it is not defined. */
#undef FUNC_NAME
}
-SCM
-ly_modules_lookup (SCM modules, SCM sym)
+/* Lookup SYM in a list of modules, which do not have to be related.
+ Return the first instance. */
+LY_DEFINE (ly_modules_lookup, "ly:modules-lookup",
+ 2, 1, 0,
+ (SCM modules, SCM sym, SCM def),
+ "Lookup @var{sym} in the list @var{modules}, "
+ "returning the first occurence. "
+ "If not found, return @var{default}, or @code{#f}.")
{
- for (SCM s = ly_car (modules); SCM_MODULEP (s); s = ly_cdr (s))
+ for (SCM s = modules; scm_is_pair (s); s = scm_cdr (s))
{
- SCM v = scm_sym2var (sym, scm_module_lookup_closure (s), SCM_UNDEFINED);
- if (v != SCM_UNDEFINED)
- return v;
+ SCM mod = scm_car (s);
+ SCM v = ly_module_lookup (mod, sym);
+ if (SCM_VARIABLEP (v) && SCM_VARIABLE_REF (v) != SCM_UNDEFINED)
+ return scm_variable_ref (v);
}
- return SCM_UNDEFINED;
-}
-
-SCM export_function;
+ if (def != SCM_UNDEFINED)
+ return def;
+ return SCM_BOOL_F;
+}
void
ly_export (SCM module, SCM namelist)
{
+ static SCM export_function;
if (!export_function)
export_function = scm_permanent_object (scm_c_lookup ("module-export!"));
-
+
scm_call_2 (SCM_VARIABLE_REF (export_function), module, namelist);
}