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diff --git a/Host/libnxt-0.3/error.h b/Host/libnxt-0.3/error.h
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+/**
+ * NXT bootstrap interface; error handling code.
+ *
+ * Copyright 2006 David Anderson <david.anderson@calixo.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#ifndef __ERROR_H__
+#define __ERROR_H__
+
+typedef enum
+{
+ NXT_OK = 0,
+ NXT_NOT_PRESENT = 1,
+ NXT_CONFIGURATION_ERROR = 2,
+ NXT_IN_USE = 3,
+ NXT_USB_WRITE_ERROR = 4,
+ NXT_USB_READ_ERROR = 5,
+ NXT_SAMBA_PROTOCOL_ERROR = 6,
+ NXT_HANDSHAKE_FAILED = 7,
+ NXT_FILE_ERROR = 8,
+ NXT_INVALID_FIRMWARE = 9,
+} nxt_error_t;
+
+const char const *nxt_str_error(nxt_error_t err);
+
+#define NXT_ERR(expr) \
+ do { \
+ nxt_error_t nxt__err_temp = (expr); \
+ if (nxt__err_temp) \
+ return nxt__err_temp; \
+ } while(0)
+
+#endif /* __ERROR_H__ */