1 files changed, 54 insertions, 0 deletions
diff --git a/src/api/helpers.c b/src/api/helpers.c
new file mode 100644
index 0000000000..425da998bc
--- /dev/null
+++ b/src/api/helpers.c
@@ -0,0 +1,54 @@
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "api/helpers.h"
+#include "api/defs.h"
+#include "../vim.h"
+
+void try_start()
+{
+  ++trylevel;
+}
+
+bool try_end(Error *err)
+{
+  --trylevel;
+
+  // Without this it stops processing all subsequent VimL commands and
+  // generates strange error messages if I e.g. try calling Test() in a
+  // cycle
+  did_emsg = false;
+
+  if (got_int) {
+    const char msg[] = "Keyboard interrupt";
+
+    if (did_throw) {
+      // If we got an interrupt, discard the current exception 
+      discard_current_exception();
+    }
+
+    strncpy(err->msg, msg, sizeof(err->msg));
+    err->set = true;
+    got_int = false;
+  } else if (msg_list != NULL && *msg_list != NULL) {
+    int should_free;
+    char *msg = (char *)get_exception_string(*msg_list,
+                                             ET_ERROR,
+                                             NULL,
+                                             &should_free);
+    strncpy(err->msg, msg, sizeof(err->msg));
+    err->set = true;
+    free_global_msglist();
+
+    if (should_free) {
+      free(msg);
+    }
+  } else if (did_throw) {
+    strncpy(err->msg, (char *)current_exception->value, sizeof(err->msg));
+    err->set = true;
+  }
+
+  return err->set;
+}
+