make lineno_width() from blame reusable for others

diff --git a/pager.c b/pager.c
index 975955ba82a0dbb128d6733090cd74c2b509ea81..96c07babbd7756a59fb5e891bf78f9c4396fed13 100644 (file)
--- a/pager.c
+++ b/pager.c
@@ -110,3 +110,15 @@ int pager_in_use(void)
        env = getenv("GIT_PAGER_IN_USE");
        return env ? git_config_bool("GIT_PAGER_IN_USE", env) : 0;
 }
+
+/*
+ * How many columns do we need to show this number in decimal?
+ */
+int decimal_width(int number)
+{
+       int i, width;
+
+       for (width = 1, i = 10; i <= number; width++)
+               i *= 10;
+       return width;
+}