-/*
-ly-module.cc -- implement guile module stuff.
-
-source file of the GNU LilyPond music typesetter
-
-(c) 2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+/*
+ 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>
- */
+*/
+#include "main.hh"
#include "string.hh"
#include "lily-guile.hh"
-#include "ly-modules.hh"
+#include "ly-module.hh"
+#include "protected-scm.hh"
+
+#define FUNC_NAME __FUNCTION__
static int module_count;
void
-ly_init_anonymous_module (void * data)
+ly_init_anonymous_module (void *data)
{
- scm_c_use_module ("lily");
+ (void) data;
}
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_scheme_function ("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)
+{
+ (void) result;
+ SCM module = (SCM) closure;
+ 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)();
+
void
-ly_copy_module_variables (SCM dest, SCM src)
+ly_import_module (SCM dest, SCM src)
{
- SCM obarr= SCM_MODULE_OBARRAY(src);
- SCM syms = SCM_EOL;
+ SCM_VALIDATE_MODULE (1, src);
+ scm_internal_hash_fold ((Hash_cl_func) &ly_module_define, (void*) dest,
+ SCM_EOL, SCM_MODULE_OBARRAY (src));
+}
- for (int i = 0; i < SCM_VECTOR_LENGTH (obarr); i++)
- {
- for( SCM s = scm_vector_ref(obarr, SCM_MAKINUM (i));
- gh_pair_p (s); s = gh_cdr (s))
- {
- scm_module_define (dest, gh_caar (s), scm_variable_ref (gh_cdar(s)));
- }
- }
+static SCM
+accumulate_symbol (void *closure, SCM key, SCM val, SCM result)
+{
+ (void) closure;
+ (void) val;
+ return scm_cons (key, result);
}
SCM
ly_module_symbols (SCM mod)
{
- SCM obarr= SCM_MODULE_OBARRAY(mod);
- SCM syms = SCM_EOL;
-
- for (int i = 0; i < SCM_VECTOR_LENGTH (obarr); i++)
- {
- for( SCM s = scm_vector_ref(obarr, SCM_MAKINUM (i));
- gh_pair_p (s); s = gh_cdr (s))
- {
- syms = scm_cons (gh_caar (s), syms);
- }
- }
- return syms;
+ 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);
}
+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);
+}
-
-SCM
-ly_module_to_alist (SCM mod)
+LY_DEFINE(ly_module_to_alist, "ly:module->alist",
+ 1,0,0, (SCM mod),
+ "Dump the contents of module @var{mod} as an alist.")
{
- SCM obarr= SCM_MODULE_OBARRAY(mod);
- SCM alist = SCM_EOL;
+ SCM_VALIDATE_MODULE (1, mod);
+ SCM obarr= SCM_MODULE_OBARRAY (mod);
- for (int i = 0; i < SCM_VECTOR_LENGTH (obarr); i++)
- {
- for( SCM s = scm_vector_ref(obarr, SCM_MAKINUM (i));
- gh_pair_p (s); s = gh_cdr (s))
- {
- alist = scm_acons (gh_caar (s), scm_variable_ref (gh_cdar (s)),
- alist);
- }
- }
- return alist;
+ 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.
- */
+/* Lookup SYM, but don't give error when it is not defined. */
SCM
ly_module_lookup (SCM module, SCM sym)
{
- SCM var;
#define FUNC_NAME __FUNCTION__
SCM_VALIDATE_MODULE (1, module);
- var = scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_F);
- return var;
+ return scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_F);
+#undef FUNC_NAME
}
-SCM export_function ;
+/*
+ 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 = modules; ly_c_pair_p (s); s = ly_cdr (s))
+ {
+ SCM mod = ly_car (s);
+ SCM v = scm_sym2var (sym, scm_module_lookup_closure (mod), SCM_UNDEFINED);
+ if (SCM_VARIABLEP(v) && SCM_VARIABLE_REF(v) != SCM_UNDEFINED)
+ return SCM_VARIABLE_REF(v);
+ }
+
+ if (def != SCM_UNDEFINED)
+ return def;
+ else
+ 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!"));
- }
+ export_function = scm_permanent_object (scm_c_lookup ("module-export!"));
- scm_call_2 (SCM_VARIABLE_REF (export_function),
- module, namelist);
+ scm_call_2 (SCM_VARIABLE_REF (export_function), module, namelist);
}
void
projects / lilypond.git / blobdiff