[dpdk-dev] [PATCH v4 3/7] examples/packet_ordering: enhance getopt_long usage

[Ibtisam Tariq <ibtisam.tariq@emumba.com>]

Instead of using getopt_long return value, strcmp was used to
compare the input parameters with the struct option array. This
patch get rid of all those strcmp by directly binding each longopt
with an int enum. This is to improve readability and consistency in
all examples.

Bugzilla ID: 238
Cc: sergio.gonzalez.monroy@intel.com
Cc: phil.yang@arm.com

Reported-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ibtisam Tariq <ibtisam.tariq@emumba.com>
---
v4:
* None.

v3:
* None.

v2:
* Remove extra indentations.
* Remove extra block brackets in switch statement.
* Change enum names to start with OPT_ and remove KEYWORD from enum names.

v1:
* enhance getopt_long usage.
---
 examples/packet_ordering/main.c | 33 ++++++++++++++++++++-------------
 1 file changed, 20 insertions(+), 13 deletions(-)

diff --git a/examples/packet_ordering/main.c b/examples/packet_ordering/main.c
index 4bea1982d..ff670747f 100644
--- a/examples/packet_ordering/main.c
+++ b/examples/packet_ordering/main.c
@@ -29,6 +29,13 @@
 /* Macros for printing using RTE_LOG */
 #define RTE_LOGTYPE_REORDERAPP          RTE_LOGTYPE_USER1
 
+enum {
+#define OPT_DISABLE_REORDER "disable-reorder"
+	OPT_DISABLE_REORDER_NUM = 256,
+#define OPT_INSIGHT_WORKER  "insight-worker"
+	OPT_INSIGHT_WORKER_NUM,
+};
+
 unsigned int portmask;
 unsigned int disable_reorder;
 unsigned int insight_worker;
@@ -157,9 +164,9 @@ parse_args(int argc, char **argv)
 	char **argvopt;
 	char *prgname = argv[0];
 	static struct option lgopts[] = {
-		{"disable-reorder", 0, 0, 0},
-		{"insight-worker", 0, 0, 0},
-		{NULL, 0, 0, 0}
+		{OPT_DISABLE_REORDER, 0, NULL, OPT_DISABLE_REORDER_NUM},
+		{OPT_INSIGHT_WORKER,  0, NULL, OPT_INSIGHT_WORKER_NUM },
+		{NULL,                0, 0,    0                      }
 	};
 
 	argvopt = argv;
@@ -176,18 +183,18 @@ parse_args(int argc, char **argv)
 				return -1;
 			}
 			break;
+
 		/* long options */
-		case 0:
-			if (!strcmp(lgopts[option_index].name, "disable-reorder")) {
-				printf("reorder disabled\n");
-				disable_reorder = 1;
-			}
-			if (!strcmp(lgopts[option_index].name,
-						"insight-worker")) {
-				printf("print all worker statistics\n");
-				insight_worker = 1;
-			}
+		case OPT_DISABLE_REORDER_NUM:
+			printf("reorder disabled\n");
+			disable_reorder = 1;
+			break;
+
+		case OPT_INSIGHT_WORKER_NUM:
+			printf("print all worker statistics\n");
+			insight_worker = 1;
 			break;
+
 		default:
 			print_usage(prgname);
 			return -1;
-- 
2.17.1