Re: [PATCH 2/2] Rename lineno_width to decimal_width and export it

Zbigniew Jędrzejewski-Szmek [off-list ref] writes:

This function will be used in calculating diff --stat graph width.
The name is changed because the function works for any number.
The function is moved from builtins/blame.c to pager.c because it
will be used not only in builtins/blame.c.

I'd prefer to see description of preliminary changes phrased without
depending too heavily on things that hasn't happened when possible.
Making a generic helper function to count digits necessary to print a
cardinal number available to future callers is a good thing by itself,
even if the "dynamic --stat width computation" turned out to be a bad
idea for whatever reason (I am not saying it is a bad idea here).

Perhaps like this.

	Subject: make lineno_width() from blame reusable for others

	builtin/blame.c has a helper function to compute how many columns
	we need to show a line-number, whose implementation is reusable as
	a more generic helper function to count the number of columns
	necessary to show any cardinal number.

	Rename it to decimal_width(), move it to pager.c and export it for
        use by future callers.

And you can say something like "I'll be using this in 'diff --stat' in
later patches" after the three-dash line.

---

Sign-off before the three-dash line?

+/*
+ * How many columns do we need to show numbers in decimal?

s/numbers/this number/;

+ */
+int decimal_width(int number)

Don't we want to make the argument "unsigned number" instead?

+{
+	int i, width;
+
+	for (width = 1, i = 10; i <= number; width++)
+		i *= 10;
+	return width;
+}