[dpdk-dev] [PATCH 7/8] examples/vhost_crypto: 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.

Bugzilla ID: 238
Fixes: f5188211c7 ("examples/vhost_crypto: add sample application")
Cc: roy.fan.zhang@intel.com

Reported-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ibtisam Tariq <ibtisam.tariq@emumba.com>
---
 examples/vhost_crypto/main.c | 78 ++++++++++++++++++++++--------------
 1 file changed, 49 insertions(+), 29 deletions(-)

diff --git a/examples/vhost_crypto/main.c b/examples/vhost_crypto/main.c
index 11ad49159..c68b409b3 100644
--- a/examples/vhost_crypto/main.c
+++ b/examples/vhost_crypto/main.c
@@ -62,10 +62,16 @@ struct vhost_crypto_options {
 	uint32_t guest_polling;
 } options;
 
+enum {
 #define CONFIG_KEYWORD		"config"
+	CONFIG_KEYWORD_NUM = 256,
 #define SOCKET_FILE_KEYWORD	"socket-file"
+	SOCKET_FILE_KEYWORD_NUM,
 #define ZERO_COPY_KEYWORD	"zero-copy"
+	ZERO_COPY_KEYWORD_NUM,
 #define POLLING_KEYWORD		"guest-polling"
+	POLLING_KEYWORD_NUM,
+};
 
 #define NB_SOCKET_FIELDS	(2)
 
@@ -210,10 +216,14 @@ vhost_crypto_parse_args(int argc, char **argv)
 	char **argvopt;
 	int option_index;
 	struct option lgopts[] = {
-			{SOCKET_FILE_KEYWORD, required_argument, 0, 0},
-			{CONFIG_KEYWORD, required_argument, 0, 0},
-			{ZERO_COPY_KEYWORD, no_argument, 0, 0},
-			{POLLING_KEYWORD, no_argument, 0, 0},
+			{SOCKET_FILE_KEYWORD, required_argument,
+					NULL, SOCKET_FILE_KEYWORD_NUM},
+			{CONFIG_KEYWORD, required_argument,
+					NULL, CONFIG_KEYWORD_NUM},
+			{ZERO_COPY_KEYWORD, no_argument,
+					NULL, ZERO_COPY_KEYWORD_NUM},
+			{POLLING_KEYWORD, no_argument,
+					NULL, POLLING_KEYWORD_NUM},
 			{NULL, 0, 0, 0}
 	};
 
@@ -222,36 +232,46 @@ vhost_crypto_parse_args(int argc, char **argv)
 	while ((opt = getopt_long(argc, argvopt, "s:",
 				  lgopts, &option_index)) != EOF) {
 
+		if (opt == '?') {
+			vhost_crypto_usage(prgname);
+			return -1;
+		}
+
 		switch (opt) {
-		case 0:
-			if (strcmp(lgopts[option_index].name,
-					SOCKET_FILE_KEYWORD) == 0) {
-				ret = parse_socket_arg(optarg);
-				if (ret < 0) {
-					vhost_crypto_usage(prgname);
-					return ret;
-				}
-			} else if (strcmp(lgopts[option_index].name,
-					CONFIG_KEYWORD) == 0) {
-				ret = parse_config(optarg);
-				if (ret < 0) {
-					vhost_crypto_usage(prgname);
-					return ret;
-				}
-			} else if (strcmp(lgopts[option_index].name,
-					ZERO_COPY_KEYWORD) == 0) {
-				options.zero_copy =
-					RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE;
-			} else if (strcmp(lgopts[option_index].name,
-					POLLING_KEYWORD) == 0) {
-				options.guest_polling = 1;
-			} else {
+		case SOCKET_FILE_KEYWORD_NUM:
+		{
+			ret = parse_socket_arg(optarg);
+			if (ret < 0) {
 				vhost_crypto_usage(prgname);
-				return -EINVAL;
+				return ret;
 			}
 			break;
+		}
+		case CONFIG_KEYWORD_NUM:
+		{
+			ret = parse_config(optarg);
+			if (ret < 0) {
+				vhost_crypto_usage(prgname);
+				return ret;
+			}
+			break;
+		}
+		case ZERO_COPY_KEYWORD_NUM:
+		{
+			options.zero_copy =
+				RTE_VHOST_CRYPTO_ZERO_COPY_ENABLE;
+			break;
+		}
+		case POLLING_KEYWORD_NUM:
+		{
+			options.guest_polling = 1;
+			break;
+		}
 		default:
-			return -1;
+		{
+			vhost_crypto_usage(prgname);
+			return -EINVAL;
+		}
 		}
 	}
 
-- 
2.17.1