gigaset: convert strcmp chain to table lookup

Replace the sequence of strcmp calls for interpreting ZSAU parameter
strings by a table of known strings and lookup loop to improve
readability.

Impact: readability improvement, no functional change
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 25 insertions, 23 deletions

diff --git a/drivers/isdn/gigaset/ev-layer.c b/drivers/isdn/gigaset/ev-layer.c
index a9a397519bac..ddeb0456d202 100644
--- a/drivers/isdn/gigaset/ev-layer.c
+++ b/drivers/isdn/gigaset/ev-layer.c
@@ -374,7 +374,11 @@ struct reply_t gigaset_tab_cid[] =
 };
 
 
-static const struct resp_type_t resp_type[] =
+static const struct resp_type_t {
+        unsigned char   *response;
+        int             resp_code;
+        int             type;
+} resp_type[] =
 {
         {"OK",          RSP_OK,         RT_NOTHING},
         {"ERROR",       RSP_ERROR,      RT_NOTHING},
@@ -402,6 +406,20 @@ static const struct resp_type_t resp_type[] =
         {NULL,          0,              0}
 };
 
+static const struct zsau_resp_t {
+        unsigned char   *str;
+        int             code;
+} zsau_resp[] =
+{
+        {"OUTGOING_CALL_PROCEEDING",    ZSAU_OUTGOING_CALL_PROCEEDING},
+        {"CALL_DELIVERED",              ZSAU_CALL_DELIVERED},
+        {"ACTIVE",                      ZSAU_ACTIVE},
+        {"DISCONNECT_IND",              ZSAU_DISCONNECT_IND},
+        {"NULL",                        ZSAU_NULL},
+        {"DISCONNECT_REQ",              ZSAU_DISCONNECT_REQ},
+        {NULL,                          ZSAU_UNKNOWN}
+};
+
 /*
  * Get integer from char-pointer
  */
@@ -480,6 +498,7 @@ void gigaset_handle_modem_response(struct cardstate *cs)
         int params;
         int i, j;
         const struct resp_type_t *rt;
+        const struct zsau_resp_t *zr;
         int curarg;
         unsigned long flags;
         unsigned next, tail, head;
@@ -606,25 +625,14 @@ void gigaset_handle_modem_response(struct cardstate *cs)
                                 event->parameter = ZSAU_NONE;
                                 break;
                         }
-                        if (!strcmp(argv[curarg], "OUTGOING_CALL_PROCEEDING"))
-                                event->parameter =
-                                        ZSAU_OUTGOING_CALL_PROCEEDING;
-                        else if (!strcmp(argv[curarg], "CALL_DELIVERED"))
-                                event->parameter = ZSAU_CALL_DELIVERED;
-                        else if (!strcmp(argv[curarg], "ACTIVE"))
-                                event->parameter = ZSAU_ACTIVE;
-                        else if (!strcmp(argv[curarg], "DISCONNECT_IND"))
-                                event->parameter = ZSAU_DISCONNECT_IND;
-                        else if (!strcmp(argv[curarg], "NULL"))
-                                event->parameter = ZSAU_NULL;
-                        else if (!strcmp(argv[curarg], "DISCONNECT_REQ"))
-                                event->parameter = ZSAU_DISCONNECT_REQ;
-                        else {
-                                event->parameter = ZSAU_UNKNOWN;
+                        for (zr = zsau_resp; zr->str; ++zr)
+                                if (!strcmp(argv[curarg], zr->str))
+                                        break;
+                        event->parameter = zr->code;
+                        if (!zr->str)
                                 dev_warn(cs->dev,
                                         "%s: unknown parameter %s after ZSAU\n",
                                          __func__, argv[curarg]);
-                        }
                         ++curarg;
                         break;
                 case RT_STRING:
diff --git a/drivers/isdn/gigaset/gigaset.h b/drivers/isdn/gigaset/gigaset.h
index 3c74cd164019..e963a6c2e86d 100644
--- a/drivers/isdn/gigaset/gigaset.h
+++ b/drivers/isdn/gigaset/gigaset.h
@@ -357,12 +357,6 @@ struct at_state_t {
         struct bc_state         *bcs;
 };
 
-struct resp_type_t {
-        unsigned char   *response;
-        int             resp_code;      /* RSP_XXXX */
-        int             type;           /* RT_XXXX */
-};
-
 struct event_t {
         int type;
         void *ptr, *arg;