drivers: Factor out std_*_idx*().

[libsigrok.git] / src / hardware / hantek-dso / api.c

diff --git a/src/hardware/hantek-dso/api.c b/src/hardware/hantek-dso/api.c
index 78b7f3b304e7d725733c53f9b70485e1c9cc4fa9..cdc4360e9a40b440099ae86e7ada37b46b63edcf 100644 (file)
--- a/src/hardware/hantek-dso/api.c
+++ b/src/hardware/hantek-dso/api.c
@@ -392,12 +392,11 @@ static int dev_close(struct sr_dev_inst *sdi)
        return SR_OK;
 }
 
-static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
-               const struct sr_channel_group *cg)
+static int config_get(uint32_t key, GVariant **data,
+       const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 {
        struct dev_context *devc;
        struct sr_usb_dev_inst *usb;
-       char str[128];
        const char *s;
        const uint64_t *vdiv;
        int ch_idx;
@@ -425,8 +424,7 @@ static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *s
                                /* Device still needs to re-enumerate after firmware
                                 * upload, so we don't know its (future) address. */
                                return SR_ERR;
-                       snprintf(str, 128, "%d.%d", usb->bus, usb->address);
-                       *data = g_variant_new_string(str);
+                       *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
                        break;
                case SR_CONF_TIMEBASE:
                        *data = g_variant_new("(tt)", timebases[devc->timebase][0],
@@ -472,15 +470,12 @@ static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *s
        return SR_OK;
 }
 
-static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
-               const struct sr_channel_group *cg)
+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;
        double tmp_double;
-       uint64_t tmp_u64, p, q;
-       int tmp_int, ch_idx;
-       unsigned int i;
-       const char *tmp_str;
+       int ch_idx, idx;
 
        devc = sdi->priv;
        if (!cg) {
@@ -489,10 +484,9 @@ static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sd
                        devc->limit_frames = g_variant_get_uint64(data);
                        break;
                case SR_CONF_TRIGGER_SLOPE:
-                       tmp_str = g_variant_get_string(data, NULL);
-                       if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
+                       if ((idx = std_str_idx(data, ARRAY_AND_SIZE(trigger_slopes))) < 0)
                                return SR_ERR_ARG;
-                       devc->triggerslope = (tmp_str[0] == 'r')
+                       devc->triggerslope = (trigger_slopes[idx][0] == 'r')
                                ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
                        break;
                case SR_CONF_HORIZ_TRIGGERPOS:
@@ -504,40 +498,19 @@ static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sd
                                devc->triggerposition = tmp_double;
                        break;
                case SR_CONF_BUFFERSIZE:
-                       tmp_u64 = g_variant_get_uint64(data);
-                       for (i = 0; i < NUM_BUFFER_SIZES; i++) {
-                               if (devc->profile->buffersizes[i] == tmp_u64) {
-                                       devc->framesize = tmp_u64;
-                                       break;
-                               }
-                       }
-                       if (i == NUM_BUFFER_SIZES)
+                       if ((idx = std_u64_idx(data, devc->profile->buffersizes, NUM_BUFFER_SIZES)) < 0)
                                return SR_ERR_ARG;
+                       devc->framesize = devc->profile->buffersizes[idx];
                        break;
                case SR_CONF_TIMEBASE:
-                       g_variant_get(data, "(tt)", &p, &q);
-                       tmp_int = -1;
-                       for (i = 0; i < ARRAY_SIZE(timebases); i++) {
-                               if (timebases[i][0] == p && timebases[i][1] == q) {
-                                       tmp_int = i;
-                                       break;
-                               }
-                       }
-                       if (tmp_int >= 0)
-                               devc->timebase = tmp_int;
-                       else
+                       if ((idx = std_u64_tuple_idx(data, ARRAY_AND_SIZE(timebases))) < 0)
                                return SR_ERR_ARG;
+                       devc->timebase = idx;
                        break;
                case SR_CONF_TRIGGER_SOURCE:
-                       tmp_str = g_variant_get_string(data, NULL);
-                       for (i = 0; trigger_sources[i]; i++) {
-                               if (!strcmp(tmp_str, trigger_sources[i])) {
-                                       devc->triggersource = g_strdup(tmp_str);
-                                       break;
-                               }
-                       }
-                       if (trigger_sources[i] == 0)
+                       if ((idx = std_str_idx(data, ARRAY_AND_SIZE(trigger_sources))) < 0)
                                return SR_ERR_ARG;
+                       devc->triggersource = g_strdup(trigger_sources[idx]);
                        break;
                default:
                        return SR_ERR_NA;
@@ -554,29 +527,14 @@ static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sd
                        devc->filter[ch_idx] = g_variant_get_boolean(data);
                        break;
                case SR_CONF_VDIV:
-                       g_variant_get(data, "(tt)", &p, &q);
-                       tmp_int = -1;
-                       for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
-                               if (vdivs[i][0] == p && vdivs[i][1] == q) {
-                                       tmp_int = i;
-                                       break;
-                               }
-                       }
-                       if (tmp_int >= 0) {
-                               devc->voltage[ch_idx] = tmp_int;
-                       } else
+                       if ((idx = std_u64_tuple_idx(data, ARRAY_AND_SIZE(vdivs))) < 0)
                                return SR_ERR_ARG;
+                       devc->voltage[ch_idx] = idx;
                        break;
                case SR_CONF_COUPLING:
-                       tmp_str = g_variant_get_string(data, NULL);
-                       for (i = 0; coupling[i]; i++) {
-                               if (!strcmp(tmp_str, coupling[i])) {
-                                       devc->coupling[ch_idx] = i;
-                                       break;
-                               }
-                       }
-                       if (coupling[i] == 0)
+                       if ((idx = std_str_idx(data, ARRAY_AND_SIZE(coupling))) < 0)
                                return SR_ERR_ARG;
+                       devc->coupling[ch_idx] = idx;
                        break;
                default:
                        return SR_ERR_NA;
@@ -586,8 +544,8 @@ static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sd
        return SR_OK;
 }
 
-static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
-               const struct sr_channel_group *cg)
+static int config_list(uint32_t key, GVariant **data,
+       const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 {
        struct dev_context *devc;