1 files changed, 31 insertions, 0 deletions
diff --git a/libusb/error.h b/libusb/error.h
new file mode 100644
index 0000000..173e6fd
--- /dev/null
+++ b/libusb/error.h
@@ -0,0 +1,31 @@
+#ifndef _ERROR_H_
+#define _ERROR_H_
+
+typedef enum {
+  USB_ERROR_TYPE_NONE = 0,
+  USB_ERROR_TYPE_STRING,
+  USB_ERROR_TYPE_ERRNO,
+} usb_error_type_t;
+
+extern char usb_error_str[1024];
+extern int usb_error_errno;
+extern usb_error_type_t usb_error_type;
+
+#define USB_ERROR(x) \
+	do { \
+          usb_error_type = USB_ERROR_TYPE_ERRNO; \
+          usb_error_errno = x; \
+	  return x; \
+	} while (0)
+
+#define USB_ERROR_STR(x, format, args...) \
+	do { \
+	  usb_error_type = USB_ERROR_TYPE_STRING; \
+	  snprintf(usb_error_str, sizeof(usb_error_str) - 1, format, ## args); \
+          if (usb_debug >= 2) \
+            fprintf(stderr, "USB error: %s\n", usb_error_str); \
+	  return x; \
+	} while (0)
+
+#endif /* _ERROR_H_ */
+