drivers: Factor out std_*_idx*().

[libsigrok.git] / src / hardware / fx2lafw / api.c

diff --git a/src/hardware/fx2lafw/api.c b/src/hardware/fx2lafw/api.c
index 28b82de937a5cd966477c47dfd586416d08e269e..adcc246ac41ebe535c70c4c22a749635885975b5 100644 (file)
--- a/src/hardware/fx2lafw/api.c
+++ b/src/hardware/fx2lafw/api.c
@@ -488,8 +488,7 @@ static int config_set(uint32_t key, GVariant *data,
        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 {
        struct dev_context *devc;
-       uint64_t arg;
-       int i, ret;
+       int idx, ret;
 
        (void)cg;
 
@@ -502,15 +501,9 @@ static int config_set(uint32_t key, GVariant *data,
 
        switch (key) {
        case SR_CONF_SAMPLERATE:
-               arg = g_variant_get_uint64(data);
-               for (i = 0; i < devc->num_samplerates; i++) {
-                       if (devc->samplerates[i] == arg) {
-                               devc->cur_samplerate = arg;
-                               break;
-                       }
-               }
-               if (i == devc->num_samplerates)
-                       ret = SR_ERR_ARG;
+               if ((idx = std_u64_idx(data, devc->samplerates, devc->num_samplerates)) < 0)
+                       return SR_ERR_ARG;
+               devc->cur_samplerate = devc->samplerates[idx];
                break;
        case SR_CONF_LIMIT_SAMPLES:
                devc->limit_samples = g_variant_get_uint64(data);