From c040defd5f5cf5beed264dd057097625d9c0d423 Mon Sep 17 00:00:00 2001
From: M Stoeckl <code@mstoeckl.com>
Date: Mon, 21 Jan 2019 12:46:45 -0500
Subject: [PATCH] Fix edge case bug in numlen, dropping use of math.h functions

(Specifically, numlen when called with INT_MIN gave an incorrect
result, because abs(INT_MIN) == INT_MIN < 0.)
---
 common/util.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/common/util.c b/common/util.c
index 60f2f1606..bd7bed2dc 100644
--- a/common/util.c
+++ b/common/util.c
@@ -12,11 +12,12 @@ int wrap(int i, int max) {
 }
 
 int numlen(int n) {
-	if (n == 0) {
-		return 1;
+	int j = n <= 0 ? 1 : 0;
+	while (n) {
+		j++;
+		n /= 10;
 	}
-	// Account for the '-' in negative numbers.
-	return log10(abs(n)) + (n > 0 ? 1 : 2);
+	return j;
 }
 
 uint32_t parse_color(const char *color) {