drivers: Factor out std_*_idx*().

[libsigrok.git] / src / hardware / motech-lps-30x / api.c

diff --git a/src/hardware/motech-lps-30x/api.c b/src/hardware/motech-lps-30x/api.c
index aa9187e87c5fb71399b5f06565b55b45fb6cdfb6..76184fb2815966ea32cb36517b57ae2b5635d68c 100644 (file)
--- a/src/hardware/motech-lps-30x/api.c
+++ b/src/hardware/motech-lps-30x/api.c
@@ -548,10 +548,8 @@ static int config_set(uint32_t key, GVariant *data,
        struct sr_channel *ch;
        gdouble dval;
        int ch_idx;
-       const char *sval;
        gboolean bval;
        int idx;
-       gboolean found;
 
        devc = sdi->priv;
 
@@ -566,22 +564,15 @@ static int config_set(uint32_t key, GVariant *data,
                case SR_CONF_LIMIT_SAMPLES:
                        return sr_sw_limits_config_set(&devc->limits, key, data);
                case SR_CONF_CHANNEL_CONFIG:
-                       sval = g_variant_get_string(data, NULL);
-                       found = FALSE;
-                       for (idx = 0; idx < (int)ARRAY_SIZE(channel_modes); idx++) {
-                               if (!strcmp(sval, channel_modes[idx])) {
-                                       found = TRUE;
-                                       if (devc->tracking_mode == idx)
-                                               break;  /* Nothing to do! */
-                                       devc->tracking_mode = idx;
-                                       if (devc->model->modelid >= LPS_304) /* No use to set anything in the smaller models. */
-                                               return lps_cmd_ok(sdi->conn, "TRACK%1d", devc->tracking_mode);
-                               }
-                               if (devc->model->modelid <= LPS_303) /* Only first setting possible for smaller models. */
-                                       break;
-                       }
-                       if (!found)
+                       if ((idx = std_str_idx(data, ARRAY_AND_SIZE(channel_modes))) < 0)
                                return SR_ERR_ARG;
+                       if (devc->model->modelid <= LPS_303 && idx != 0)
+                               break; /* Only first setting possible for smaller models. */
+                       if (devc->tracking_mode == idx)
+                               break;  /* Nothing to do! */
+                       devc->tracking_mode = idx;
+                       if (devc->model->modelid >= LPS_304) /* No use to set anything in the smaller models. */
+                               return lps_cmd_ok(sdi->conn, "TRACK%1d", devc->tracking_mode);
                        break;
                default:
                        return SR_ERR_NA;