Re: [PATCH 8/8] diff: improve positioning of add/delete blocks in diffs

> +/*
> + * If a line is indented more than this, get_indent() just returns this value.
> + * This avoids having to do absurd amounts of work for data that are not
> + * human-readable text, and also ensures that the output of get_indent fits within
> + * an int.
> + */
> +#define MAX_INDENT 200
> +
> +/*
> + * Return the amount of indentation of the specified line, treating TAB as 8
> + * columns. Return -1 if line is empty or contains only whitespace. Clamp the
> + * output value at MAX_INDENT.
> + */
> +static int get_indent(xrecord_t *rec)
> +{
> +       long i;
> +       int ret = 0;
> +
> +       for (i = 0; i < rec->size; i++) {
> +               char c = rec->ptr[i];
> +
> +               if (!XDL_ISSPACE(c))
> +                       return ret;
> +               else if (c == ' ')
> +                       ret += 1;
> +               else if (c == '\t')
> +                       ret += 8 - ret % 8;
> +               /* ignore other whitespace characters */
> +
> +               if (ret >= MAX_INDENT)
> +                       return MAX_INDENT;

> +       }
> +       /*
> +        * We have reached the end of the line without finding any non-space
> +        * characters; i.e., the whole line consists of trailing spaces, which we
> +        * are not interested in.
> +        */
> +       return -1;