rigol-ds: fix set_cfg() calls with float parameters to avoid locale issues

diff --git a/hardware/rigol-ds/api.c b/hardware/rigol-ds/api.c
index 52a59a975d31e2f2b4eb2b6c5da4079fc0851823..6220c61f43a4b769f0511a5b0f58a87c0db3e104 100644 (file)
--- a/hardware/rigol-ds/api.c
+++ b/hardware/rigol-ds/api.c
@@ -552,6 +552,7 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
        unsigned int i, j;
        int ret;
        const char *tmp_str;
+       char buffer[16];
 
        if (!(devc = sdi->priv))
                return SR_ERR_ARG;
@@ -586,14 +587,17 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
                /* We have the trigger offset as a percentage of the frame, but
                 * need to express this in seconds. */
                t_dbl = -(devc->horiz_triggerpos - 0.5) * devc->timebase * devc->num_timebases;
-               ret = set_cfg(sdi, ":TIM:OFFS %.6f", t_dbl);
+               g_ascii_formatd(buffer, sizeof(buffer), "%.6f", t_dbl);
+               ret = set_cfg(sdi, ":TIM:OFFS %s", buffer);
                break;
        case SR_CONF_TIMEBASE:
                g_variant_get(data, "(tt)", &p, &q);
                for (i = 0; i < devc->num_timebases; i++) {
                        if (devc->timebases[i][0] == p && devc->timebases[i][1] == q) {
                                devc->timebase = (float)p / q;
-                               ret = set_cfg(sdi, ":TIM:SCAL %.9f", devc->timebase);
+                               g_ascii_formatd(buffer, sizeof(buffer), "%.9f",
+                                               devc->timebase);
+                               ret = set_cfg(sdi, ":TIM:SCAL %s", buffer);
                                break;
                        }
                }
@@ -637,8 +641,10 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
                                        if (vdivs[j][0] != p || vdivs[j][1] != q)
                                                continue;
                                        devc->vdiv[i] = (float)p / q;
-                                       return set_cfg(sdi, ":CHAN%d:SCAL %.3f", i + 1,
-                                                       devc->vdiv[i]);
+                                       g_ascii_formatd(buffer, sizeof(buffer), "%.3f",
+                                                       devc->vdiv[i]);
+                                       return set_cfg(sdi, ":CHAN%d:SCAL %s", i + 1,
+                                                       buffer);
                                }
                                return SR_ERR_ARG;
                        }