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

["Zbigniew Jędrzejewski-Szmek" <zbyszek@in.waw.pl>]

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.
---
 builtin/blame.c | 18 +++---------------
 cache.h         |  1 +
 pager.c         | 12 ++++++++++++
 3 files changed, 16 insertions(+), 15 deletions(-)

This is another function to be exported. I hope it can be exported
together with term_columns(). I'll use it the next version of the diff
--stat patch.

diff --git a/builtin/blame.c b/builtin/blame.c
index 5a67c20..f028e8a 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -1829,18 +1829,6 @@ static int read_ancestry(const char *graft_file)
 }
 
 /*
- * How many columns do we need to show line numbers in decimal?
- */
-static int lineno_width(int lines)
-{
-	int i, width;
-
-	for (width = 1, i = 10; i <= lines; width++)
-		i *= 10;
-	return width;
-}
-
-/*
  * How many columns do we need to show line numbers, authors,
  * and filenames?
  */
@@ -1880,9 +1868,9 @@ static void find_alignment(struct scoreboard *sb, int *option)
 		if (largest_score < ent_score(sb, e))
 			largest_score = ent_score(sb, e);
 	}
-	max_orig_digits = lineno_width(longest_src_lines);
-	max_digits = lineno_width(longest_dst_lines);
-	max_score_digits = lineno_width(largest_score);
+	max_orig_digits = decimal_width(longest_src_lines);
+	max_digits = decimal_width(longest_dst_lines);
+	max_score_digits = decimal_width(largest_score);
 }
 
 /*
diff --git a/cache.h b/cache.h
index 2f30b3a..3857dfd 100644
--- a/cache.h
+++ b/cache.h
@@ -1176,6 +1176,7 @@ extern const char *pager_program;
 extern int pager_in_use(void);
 extern int pager_use_color;
 extern int term_columns(void);
+extern int decimal_width(int number);
 
 extern const char *editor_program;
 extern const char *askpass_program;
diff --git a/pager.c b/pager.c
index b8049a4..b6d44ef 100644
--- a/pager.c
+++ b/pager.c
@@ -155,3 +155,15 @@ int term_columns(void)
 	term_columns_cache = 80;
 	return term_columns_cache;
 }
+
+/*
+ * How many columns do we need to show numbers in decimal?
+ */
+int decimal_width(int number)
+{
+	int i, width;
+
+	for (width = 1, i = 10; i <= number; width++)
+		i *= 10;
+	return width;
+}
-- 
1.7.9.3.g2429d.dirty