eval: Add jsonencode() function

Ref #3471

1 files changed, 14 insertions, 3 deletions

diff --git a/src/nvim/garray.c b/src/nvim/garray.c
index e6cbd9332b..47a370b18c 100644
--- a/src/nvim/garray.c
+++ b/src/nvim/garray.c
@@ -188,11 +188,22 @@ void ga_concat(garray_T *gap, const char_u *restrict s)
     return;
   }
 
-  int len = (int)strlen((char *) s);
+  ga_concat_len(gap, (const char *restrict) s, strlen((char *) s));
+}
+
+/// Concatenate a string to a growarray which contains characters
+///
+/// @param[out]  gap  Growarray to modify.
+/// @param[in]  s  String to concatenate.
+/// @param[in]  len  String length.
+void ga_concat_len(garray_T *const gap, const char *restrict s,
+                   const size_t len)
+  FUNC_ATTR_NONNULL_ALL
+{
   if (len) {
-    ga_grow(gap, len);
+    ga_grow(gap, (int) len);
     char *data = gap->ga_data;
-    memcpy(data + gap->ga_len, s, (size_t)len);
+    memcpy(data + gap->ga_len, s, len);
     gap->ga_len += len;
   }
 }