vim-patch:9.1.0824: too many strlen() calls in register.c (#31022)

Problem:  too many strlen() calls in register.c
Solution: refactor code, add string_T struct to keep track
          of string lengths (John Marriott)

closes: vim/vim#15952

https://github.com/vim/vim/commit/79f6ffd388299ef3b1c95cbe658785e6e66df144

Co-authored-by: John Marriott <basilisk@internode.on.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/nvim/api/vim.c b/src/nvim/api/vim.c
index 8c88a19147..943c67ac8e 100644
--- a/src/nvim/api/vim.c
+++ b/src/nvim/api/vim.c
@@ -1317,15 +1317,15 @@ void nvim_put(ArrayOf(String) lines, String type, Boolean after, Boolean follow,
     return;  // Nothing to do.
   }
 
-  reg->y_array = arena_alloc(arena, lines.size * sizeof(uint8_t *), true);
+  reg->y_array = arena_alloc(arena, lines.size * sizeof(String), true);
   reg->y_size = lines.size;
   for (size_t i = 0; i < lines.size; i++) {
     VALIDATE_T("line", kObjectTypeString, lines.items[i].type, {
       return;
     });
     String line = lines.items[i].data.string;
-    reg->y_array[i] = arena_memdupz(arena, line.data, line.size);
-    memchrsub(reg->y_array[i], NUL, NL, line.size);
+    reg->y_array[i] = copy_string(line, arena);
+    memchrsub(reg->y_array[i].data, NUL, NL, line.size);
   }
 
   finish_yankreg_from_object(reg, false);