1 files changed, 117 insertions, 0 deletions
diff --git a/spec/ruby/optional/capi/ext/util_spec.c b/spec/ruby/optional/capi/ext/util_spec.c
new file mode 100644
index 0000000000..043da99ace
--- /dev/null
+++ b/spec/ruby/optional/capi/ext/util_spec.c
@@ -0,0 +1,117 @@
+#include "ruby.h"
+#include "ruby/util.h"
+#include "rubyspec.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+VALUE util_spec_rb_scan_args(VALUE self, VALUE argv, VALUE fmt, VALUE expected, VALUE acc) {
+  int result, argc;
+  VALUE a1, a2, a3, a4, a5, a6;
+
+  argc = (int) RARRAY_LEN(argv);
+  VALUE* args = RARRAY_PTR(argv);
+  /* the line above can be replaced with this for Ruby implementations which do not support RARRAY_PTR() yet
+    VALUE args[6];
+    for(int i = 0; i < argc; i++) {
+      args[i] = rb_ary_entry(argv, i);
+    } */
+
+  a1 = a2 = a3 = a4 = a5 = a6 = INT2FIX(-1);
+
+  if (*RSTRING_PTR(fmt) == 'k') {
+    result = rb_scan_args_kw(RB_SCAN_ARGS_KEYWORDS, argc, args, RSTRING_PTR(fmt)+1, &a1, &a2, &a3, &a4, &a5, &a6);
+  } else {
+    result = rb_scan_args(argc, args, RSTRING_PTR(fmt), &a1, &a2, &a3, &a4, &a5, &a6);
+  }
+
+  switch(NUM2INT(expected)) {
+  case 6:
+    rb_ary_unshift(acc, a6);
+    /* FALLTHROUGH */
+  case 5:
+    rb_ary_unshift(acc, a5);
+    /* FALLTHROUGH */
+  case 4:
+    rb_ary_unshift(acc, a4);
+    /* FALLTHROUGH */
+  case 3:
+    rb_ary_unshift(acc, a3);
+    /* FALLTHROUGH */
+  case 2:
+    rb_ary_unshift(acc, a2);
+    /* FALLTHROUGH */
+  case 1:
+    rb_ary_unshift(acc, a1);
+    break;
+  default:
+    rb_raise(rb_eException, "unexpected number of arguments returned by rb_scan_args");
+  }
+
+  return INT2NUM(result);
+}
+
+static VALUE util_spec_rb_get_kwargs(VALUE self, VALUE keyword_hash, VALUE keys, VALUE required, VALUE optional) {
+  int req = FIX2INT(required);
+  int opt = FIX2INT(optional);
+  int len = RARRAY_LENINT(keys);
+
+  int values_len = req + (opt < 0 ? -1 - opt : opt);
+
+  ID *ids = (ID *)alloca(sizeof(VALUE) * len);
+  VALUE *results = (VALUE *)alloca(sizeof(VALUE) * values_len);
+
+  for (int i = 0; i < len; i++) {
+    ids[i] = SYM2ID(rb_ary_entry(keys, i));
+  }
+
+  int extracted = rb_get_kwargs(keyword_hash, ids, req, opt, results);
+
+  return rb_ary_new_from_values(extracted, results);
+}
+
+static VALUE util_spec_rb_long2int(VALUE self, VALUE n) {
+  return INT2NUM(rb_long2int(NUM2LONG(n)));
+}
+
+static VALUE util_spec_rb_iter_break(VALUE self) {
+  rb_iter_break();
+  return Qnil;
+}
+
+static VALUE util_spec_rb_sourcefile(VALUE self) {
+  return rb_str_new2(rb_sourcefile());
+}
+
+static VALUE util_spec_rb_sourceline(VALUE self) {
+  return INT2NUM(rb_sourceline());
+}
+
+static VALUE util_spec_strtod(VALUE self, VALUE string) {
+  char *endptr = NULL;
+  double value = strtod(RSTRING_PTR(string), &endptr);
+  return rb_ary_new_from_args(2, rb_float_new(value), endptr ? rb_str_new2(endptr) : Qnil);
+}
+
+static VALUE util_spec_ruby_strtod(VALUE self, VALUE string) {
+  char *endptr = NULL;
+  double value = ruby_strtod(RSTRING_PTR(string), &endptr);
+  return rb_ary_new_from_args(2, rb_float_new(value), endptr ? rb_str_new2(endptr) : Qnil);
+}
+
+void Init_util_spec(void) {
+  VALUE cls = rb_define_class("CApiUtilSpecs", rb_cObject);
+  rb_define_method(cls, "rb_scan_args", util_spec_rb_scan_args, 4);
+  rb_define_method(cls, "rb_get_kwargs", util_spec_rb_get_kwargs, 4);
+  rb_define_method(cls, "rb_long2int", util_spec_rb_long2int, 1);
+  rb_define_method(cls, "rb_iter_break", util_spec_rb_iter_break, 0);
+  rb_define_method(cls, "rb_sourcefile", util_spec_rb_sourcefile, 0);
+  rb_define_method(cls, "rb_sourceline", util_spec_rb_sourceline, 0);
+  rb_define_method(cls, "strtod", util_spec_strtod, 1);
+  rb_define_method(cls, "ruby_strtod", util_spec_ruby_strtod, 1);
+}
+
+#ifdef __cplusplus
+}
+#endif