Removal of sdi->index, step 4: fix trivial sr_dev_inst_new() calls

[libsigrok.git] / src / usb.c

diff --git a/src/usb.c b/src/usb.c
index c3279d0ae1ef58640013483f9b6711deca9be15a..1c9e4118ebc0ad96e35e01cbadaf654e547c50bc 100644 (file)
--- a/src/usb.c
+++ b/src/usb.c
@@ -20,6 +20,7 @@
  */
 
 #include <stdlib.h>
+#include <memory.h>
 #include <glib.h>
 #include <libusb.h>
 #include "libsigrok.h"
@@ -269,3 +270,28 @@ SR_PRIV int usb_source_remove(struct sr_session *session, struct sr_context *ctx
 
        return SR_OK;
 }
+
+SR_PRIV int usb_get_port_path(libusb_device *dev, const char *path, int path_len)
+{
+       gchar s[64];
+       gchar tmp_s[8];
+       uint8_t port_numbers[32];
+       int i;
+
+       memset(port_numbers, 0, sizeof(port_numbers));
+       libusb_get_port_numbers(dev, port_numbers, sizeof(port_numbers));
+
+       g_snprintf((gchar*)&s, sizeof(s), "usb/%d-%d",
+                       libusb_get_bus_number(dev), port_numbers[0]);
+
+       i = 1;
+       while (port_numbers[i]) {
+               g_snprintf(tmp_s, sizeof(tmp_s), ".%d", port_numbers[i]);
+               g_strlcat((gchar*)&s, tmp_s, sizeof(s));
+               i++;
+       }
+
+       g_strlcpy((gchar*)path, s, path_len);
+
+       return SR_OK;
+}