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-rw-r--r--src/nvim/eval/typval.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/nvim/eval/typval.c b/src/nvim/eval/typval.c
index 7e94e03823..d56efe30da 100644
--- a/src/nvim/eval/typval.c
+++ b/src/nvim/eval/typval.c
@@ -2750,6 +2750,23 @@ int tv_blob_set_range(blob_T *dest, long n1, long n2, typval_T *src)
return OK;
}
+/// Store one byte "byte" in blob "blob" at "idx".
+/// Append one byte if needed.
+void tv_blob_set_append(blob_T *blob, int idx, uint8_t byte)
+{
+ garray_T *gap = &blob->bv_ga;
+
+ // Allow for appending a byte. Setting a byte beyond
+ // the end is an error otherwise.
+ if (idx <= gap->ga_len) {
+ if (idx == gap->ga_len) {
+ ga_grow(gap, 1);
+ gap->ga_len++;
+ }
+ tv_blob_set(blob, idx, byte);
+ }
+}
+
/// "remove({blob})" function
void tv_blob_remove(typval_T *argvars, typval_T *rettv, const char *arg_errmsg)
{