+#include <dlfcn.h>
+
+static void *libbt;
+static int bt_initialized;
+
+static int init_bt(void) {
+ if (!bt_initialized) {
+ bt_initialized = 1;
+ libbt = dlopen("libbluetooth.so.3", RTLD_LAZY);
+ if (!libbt)
+ printf("failed to find bluetooth library\n");
+ }
+ return libbt != NULL;
+}
+
+#define join(a,b) a ## b
+#define bt_func(name, ret, fail, formals, actuals) \
+ static ret join(altos_, name) formals { \
+ static ret (*name) formals; \
+ if (!init_bt()) return fail; \
+ name = dlsym(libbt, #name); \
+ if (!name) return fail; \
+ return name actuals; \
+ }
+
+bt_func(ba2str, int, -1, (const bdaddr_t *ba, char *str), (ba, str))
+#define ba2str altos_ba2str
+
+bt_func(str2ba, int, -1, (const char *str, bdaddr_t *ba), (str, ba))
+#define str2ba altos_str2ba
+
+bt_func(hci_read_remote_name, int, -1, (int sock, const bdaddr_t *ba, int len, char *name, int timeout), (sock, ba, len, name, timeout))
+#define hci_read_remote_name altos_hci_read_remote_name
+
+bt_func(hci_open_dev, int, -1, (int dev_id), (dev_id))
+#define hci_open_dev altos_hci_open_dev
+
+bt_func(hci_get_route, int, -1, (bdaddr_t *bdaddr), (bdaddr))
+#define hci_get_route altos_hci_get_route
+
+bt_func(hci_inquiry, int, -1, (int adapter_id, int len, int max_rsp, const uint8_t *lap, inquiry_info **devs, long flags), (adapter_id, len, max_rsp, lap, devs, flags))
+#define hci_inquiry altos_hci_inquiry
+