Re: [PATCH 1/3] Limit width of formatted text by characters rather than bytes

On Sunday 2017-08-27 Will Storey wrote :

>  static void
>  concat_width (struct sbuf *buf, char *s, int width)

I would turn this to   const char *s

> +  int i = 0;
> +  /* The size of a character in bytes. */
> +  int char_len = 0;
> +  /* Index of the current character in the string. */
> +  int char_idx = 0;

These should be  size_t .

> +      /* Invalid character? */
> +      if (char_len == -1)
> +        break;

if (char_len == (size_t) -1)

+
+      /* Null character? */
+      if (char_len == 0)
+        break;

Don't we need to check for the case when the return value is
(size_t) -2 ?