mpstat: small code shrink

Signed-off-by: Maksym Kryzhanovskyy <xmaks@email.cz>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 7 insertions, 9 deletions

diff --git a/procps/mpstat.c b/procps/mpstat.c
index 125bb3de7..b0d187ea6 100644
--- a/procps/mpstat.c
+++ b/procps/mpstat.c
@@ -954,16 +954,14 @@ int mpstat_main(int UNUSED_PARAM argc, char **argv)
         }
 
         if (opt & OPT_INTS) {
-                if (strcmp(opt_irq_fmt, "ALL") == 0)
-                        G.options |= D_IRQ_SUM + D_IRQ_CPU + D_SOFTIRQS;
-                else if (strcmp(opt_irq_fmt, "CPU") == 0)
-                        G.options |= D_IRQ_CPU;
-                else if (strcmp(opt_irq_fmt, "SUM") == 0)
-                        G.options |= D_IRQ_SUM;
-                else if (strcmp(opt_irq_fmt, "SCPU") == 0)
-                        G.options |= D_SOFTIRQS;
-                else
+                static const char v[] = {
+                        D_IRQ_CPU, D_IRQ_SUM, D_SOFTIRQS,
+                        D_IRQ_SUM + D_IRQ_CPU + D_SOFTIRQS
+                };
+                i = index_in_strings("CPU\0SUM\0SCPU\0ALL\0", opt_irq_fmt);
+                if (i == -1)
                         bb_show_usage();
+                G.options |= v[i];
         }
 
         if ((opt & OPT_UTIL) /* -u? */