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1 files changed, 50 insertions, 0 deletions

diff --git a/src/error.h b/src/error.h
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+/*
+ * Copyright (c) 2017 Richard Braun.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _ERROR_H
+#define _ERROR_H
+
+enum {
+    ERROR_INVAL = 1,
+    ERROR_AGAIN,
+    ERROR_NOMEM,
+    ERROR_IO,
+    ERROR_BUSY,
+    ERROR_EXIST,
+};
+
+/*
+ * Return the message matching the given error.
+ *
+ * The returned address points to a statically allocated, read only,
+ * null-terminated string literal. The caller must not attempt to use it
+ * for anything else than error reporting.
+ */
+const char * error_str(unsigned int error);
+
+/*
+ * If error denotes an actual error (i.e. is not 0), panic, using the given
+ * string as a prefix for the error message. A NULL prefix is allowed.
+ */
+void error_check(int error, const char *prefix);
+
+#endif /* _ERROR_H */