1 files changed, 67 insertions, 0 deletions
diff --git a/src/error.c b/src/error.c
new file mode 100644
index 0000000..8bd7875
--- /dev/null
+++ b/src/error.c
@@ -0,0 +1,67 @@
+/*
+ * 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <lib/macros.h>
+
+#include "error.h"
+#include "panic.h"
+
+/*
+ * Error message table.
+ *
+ * This table must be consistent with the enum defined in error.h.
+ */
+static const char *error_msg_table[] = {
+    "success",
+    "invalid argument",
+    "resource temporarily unavailable",
+    "not enough space",
+    "input/output error",
+    "resource busy",
+    "entry exist",
+};
+
+const char *
+error_str(unsigned int error)
+{
+    if (error >= ARRAY_SIZE(error_msg_table)) {
+        return "invalid error code";
+    }
+
+    return error_msg_table[error];
+}
+
+void
+error_check(int error, const char *prefix)
+{
+    if (!error) {
+        return;
+    }
+
+    panic("%s%s%s",
+          (prefix == NULL) ? "" : prefix,
+          (prefix == NULL) ? "" : ": ",
+          error_str(error));
+}