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-rw-r--r--Src/utils.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/Src/utils.c b/Src/utils.c
index d1313837d..45f8286df 100644
--- a/Src/utils.c
+++ b/Src/utils.c
@@ -5179,6 +5179,17 @@ mb_metastrlenend(char *ptr, int width, char *eptr)
ret = mbrtowc(&wc, &inchar, 1, &mb_shiftstate);
if (ret == MB_INCOMPLETE) {
+ /*
+ * "num_in_char" is only used for incomplete characters. The
+ * assumption is that we will output this ocatet as a single
+ * character (of single width) if we don't get a complete
+ * character; if we do get a complete character, num_in_char
+ * becomes irrelevant and is set to zero.
+ *
+ * This is in contrast to "num" which counts the characters
+ * or widths in complete characters. The two are summed,
+ * so we don't count characters twice.
+ */
num_in_char++;
} else {
if (ret == MB_INVALID) {