X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fuci.git;a=blobdiff_plain;f=err.h;fp=err.h;h=2800526a93fdb8a98ff1ffbf6d68d1ba834eec5c;hp=0000000000000000000000000000000000000000;hb=4535c379ced2bdb6a4b414f71080fa0c6f5180aa;hpb=cc84250572b1c506a5fb7be2dd783de916fddc42

diff --git a/err.h b/err.h
new file mode 100644
index 0000000..2800526
--- /dev/null
+++ b/err.h
@@ -0,0 +1,63 @@
+/*
+ * libuci - Library for the Unified Configuration Interface
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * 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.
+ */
+
+/*
+ * functions for debug and error handling
+ */
+
+#ifdef DEBUG
+#define DPRINTF(...) fprintf(stderr, __VA_ARGS__)
+#else
+#define DPRINTF(...)
+#endif
+
+/* 
+ * throw an uci exception and store the error number
+ * in the context.
+ */
+#define UCI_THROW(ctx, err) do { 	\
+	longjmp(ctx->trap, err); 	\
+} while (0)
+
+/*
+ * store the return address for handling exceptions
+ * needs to be called in every externally visible library function
+ *
+ * NB: this does not handle recursion at all. Calling externally visible
+ * functions from other uci functions is only allowed at the end of the
+ * calling function.
+ */
+#define UCI_HANDLE_ERR(ctx) do { 		\
+	int __val;			\
+	if (!ctx)			\
+		return UCI_ERR_INVAL;	\
+	__val = setjmp(ctx->trap);	\
+	if (__val) {			\
+		ctx->errno = __val;	\
+		return __val;		\
+	}				\
+} while (0)
+
+/*
+ * check the specified condition.
+ * throw an invalid argument exception if it's false
+ */
+#define UCI_ASSERT(ctx, expr) do {	\
+	if (!(expr)) {			\
+		DPRINTF("[%s:%d] Assertion failed\n", __FILE__, __LINE__); \
+		UCI_THROW(ctx, UCI_ERR_INVAL);	\
+	}				\
+} while (0)
+
+