Initial commit.

1 files changed, 91 insertions, 0 deletions

diff --git a/error.c b/error.c
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+++ b/error.c
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+/*
+ * Copyright (c) 2009, 2010 Richard Braun.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "error.h"
+#include "macros.h"
+
+/*
+ * Error message table.
+ *
+ * This table must be consistent with the enum defined in error.h.
+ */
+static const char *errormsg_table[] = {
+    "success",
+    "unknown error",
+    "invalid argument",
+    "not enough space",
+    "invalid format",
+    "not enough resources",
+    "operation not permitted",
+    "resource busy",
+    "memory limit exceeded",
+    "operation timed out",
+    "operation would block",
+    "entry not found",
+    "internal memory allocator failure"
+};
+
+#define ERRORMSG_TABLE_SIZE ARRAY_SIZE(errormsg_table)
+
+const char * error_str(unsigned int error)
+{
+    if (error >= ERRORMSG_TABLE_SIZE)
+        return "invalid error code";
+
+    return errormsg_table[error];
+}
+
+unsigned int error_from_errno(int errno_code)
+{
+    switch (errno_code) {
+    case 0:
+        return ERR_SUCCESS;
+    case EINVAL:
+        return ERR_INVAL;
+    case ENOMEM:
+        return ERR_NOMEM;
+    case EAGAIN:
+        return ERR_NORES;
+    case EPERM:
+        return ERR_PERM;
+    case EBUSY:
+        return ERR_BUSY;
+    case ETIMEDOUT:
+        return ERR_TIMEDOUT;
+    default:
+        fprintf(stderr, "unable to translate errno code (%d)\n", errno_code);
+        return ERR_UNKNOWN;
+    }
+}
+
+void error_die(unsigned int error)
+{
+    fprintf(stderr, "process terminating, reason: %s\n", error_str(error));
+    abort();
+}