1 files changed, 142 insertions, 0 deletions
diff --git a/src/err.c b/src/err.c
new file mode 100644
index 0000000..c0e2e3f
--- /dev/null
+++ b/src/err.c
@@ -0,0 +1,142 @@
+/**
+ * slibc — Yet another C library
+ * Copyright © 2015  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+#include <err.h>
+#include <error.h>
+#include <errno.h>
+
+
+
+/**
+ * Print a warning to stderr, followed by a description
+ * of the value of `errno`.
+ * 
+ * @param  format  Formatting-string for the warning.
+ * @param  ...     Formatting-arguments.
+ */
+void warn(const char* format, ...)
+{
+  va_list args;
+  va_start(args, format);
+  vwarn(format, args);
+  va_end(args);
+}
+
+
+/**
+ * Print a warning to stderr, followed by a description
+ * of the value of `errno`.
+ * 
+ * @param  format  Formatting-string for the warning.
+ * @param  args    Formatting-arguments.
+ */
+void vwarn(const char* format, va_list args)
+{
+  verror(0, errno, format, args);
+}
+
+
+/**
+ * Print a warning to stderr, but do not print a
+ * description of the value of `errno`.
+ * 
+ * @param  format  Formatting-string for the warning.
+ * @param  ...     Formatting-arguments.
+ */
+void warnx(const char* format, ...)
+{
+  va_list args;
+  va_start(args, format);
+  vwarnx(format, args);
+  va_end(args);
+}
+
+
+/**
+ * Print a warning to stderr, but do not print a
+ * description of the value of `errno`.
+ * 
+ * @param  format  Formatting-string for the warning.
+ * @param  args    Formatting-arguments.
+ */
+void vwarnx(const char* format, va_list args)
+{
+  verror(0, 0, format, args);
+}
+
+
+/**
+ * Print an error message to stderr, followed by a
+ * description of the value of `errno`. Then exit the process.
+ * 
+ * @parma  status  The exit status the process should have.
+ * @param  format  Formatting-string for the warning.
+ * @param  ...     Formatting-arguments.
+ */
+void err(int status, const char* format, ...)
+{
+  va_list args;
+  va_start(args, format);
+  verr(status, format, args);
+  va_end(args);
+}
+
+
+/**
+ * Print an error message to stderr, followed by a
+ * description of the value of `errno`. Then exit the process.
+ * 
+ * @parma  status  The exit status the process should have.
+ * @param  format  Formatting-string for the warning.
+ * @param  args    Formatting-arguments.
+ */
+void verr(int status, const char* format, va_list args)
+{
+  verror(status, errno, format, args);
+}
+
+
+/**
+ * Print an error message to stderr, but do not print a
+ * description of the value of `errno`. Then exit the process.
+ * 
+ * @parma  status  The exit status the process should have.
+ * @param  format  Formatting-string for the warning.
+ * @param  ...     Formatting-arguments.
+ */
+void errx(int status, const char* format, ...)
+{
+  va_list args;
+  va_start(args, format);
+  verrx(status, format, args);
+  va_end(args);
+}
+
+
+/**
+ * Print an error message to stderr, but do not print a
+ * description of the value of `errno`. Then exit the process.
+ * 
+ * @parma  status  The exit status the process should have.
+ * @param  format  Formatting-string for the warning.
+ * @param  args    Formatting-arguments.
+ */
+void verrx(int status, const char* format, va_list args)
+{
+  verror(status, 0, format, args);
+}
+