1 files changed, 23 insertions, 0 deletions
diff --git a/src/error.c b/src/error.c
index b19f0ea43..c077c8663 100644
--- a/src/error.c
+++ b/src/error.c
@@ -555,6 +555,29 @@ mrb_argnum_error(mrb_state *mrb, mrb_int argc, int min, int max)
 #undef FMT
 }
 
+MRB_API mrb_value
+mrb_exc_protect(mrb_state *mrb, mrb_value (*body)(mrb_state*, void*), void *a,
+                mrb_value (*resc)(mrb_state*, void*, mrb_value), void *b)
+{
+  struct mrb_jmpbuf *prev_jmp = mrb->jmp;
+  struct mrb_jmpbuf c_jmp;
+  mrb_value v = mrb_undef_value();
+
+  MRB_TRY(&c_jmp) {
+    mrb->jmp = &c_jmp;
+    v = body(mrb, a);
+  } MRB_CATCH(&c_jmp) {
+    if (mrb->exc) {
+      v = resc(mrb, b, mrb_obj_value(mrb->exc));
+      mrb->exc = NULL;
+    }
+  } MRB_END_EXC(&c_jmp);
+
+  mrb->jmp = prev_jmp;
+
+  return v;
+}
+
 void mrb_core_init_printabort(void);
 
 int