ui: implement ext_messages

Co-Author: Dongdong Zhou <dzhou121@gmail.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/src/nvim/api/private/helpers.c b/src/nvim/api/private/helpers.c
index f5cac82315..19a3368c1c 100644
--- a/src/nvim/api/private/helpers.c
+++ b/src/nvim/api/private/helpers.c
@@ -712,6 +712,12 @@ String cbuf_to_string(const char *buf, size_t size)
   };
 }
 
+String cstrn_to_string(const char *str, size_t maxsize)
+  FUNC_ATTR_NONNULL_ALL
+{
+  return cbuf_to_string(str, strnlen(str, maxsize));
+}
+
 /// Creates a String using the given C string. Unlike
 /// cstr_to_string this function DOES NOT copy the C string.
 ///
@@ -726,6 +732,18 @@ String cstr_as_string(char *str) FUNC_ATTR_PURE
   return (String){ .data = str, .size = strlen(str) };
 }
 
+/// Return the owned memory of a ga as a String
+///
+/// Reinitializes the ga to a valid empty state.
+String ga_take_string(garray_T *ga)
+{
+  String str = { .data = (char *)ga->ga_data, .size = (size_t)ga->ga_len };
+  ga->ga_data = NULL;
+  ga->ga_len = 0;
+  ga->ga_maxlen = 0;
+  return str;
+}
+
 /// Collects `n` buffer lines into array `l`, optionally replacing newlines
 /// with NUL.
 ///