util: replace decimal_str_max() by a typesafe macro DECIMAL_STR_WIDTH()

DECIMAL_STR_WIDTH() now works on any numeric type, and is easier to
distingish from DECIMAL_STR_MAX().

This also replaces another manual implementaiton of ulog10 by this macro.

1 files changed, 1 insertions, 12 deletions

diff --git a/src/shared/cgroup-show.c b/src/shared/cgroup-show.c
index 9ee532ca22..0e82375ea9 100644
--- a/src/shared/cgroup-show.c
+++ b/src/shared/cgroup-show.c
@@ -40,17 +40,6 @@ static int compare(const void *a, const void *b) {
         return 0;
 }
 
-static unsigned ilog10(unsigned long ul) {
-        int n = 0;
-
-        while (ul > 0) {
-                n++;
-                ul /= 10;
-        }
-
-        return n;
-}
-
 static void show_pid_array(int pids[], unsigned n_pids, const char *prefix, unsigned n_columns, bool extra, bool more, bool kernel_threads, OutputFlags flags) {
         unsigned i, m, pid_width;
         pid_t biggest = 0;
@@ -71,7 +60,7 @@ static void show_pid_array(int pids[], unsigned n_pids, const char *prefix, unsi
                         pids[m++] = pids[i];
         }
         n_pids = m;
-        pid_width = ilog10(biggest);
+        pid_width = DECIMAL_STR_WIDTH(biggest);
 
         /* And sort */
         qsort(pids, n_pids, sizeof(pid_t), compare);