1 files changed, 35 insertions, 0 deletions
diff --git a/lib/error.c b/lib/error.c
new file mode 100644
index 0000000..67828c9
--- /dev/null
+++ b/lib/error.c
@@ -0,0 +1,35 @@
+#include "error.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+extern char* cmd;
+
+void error_s(const char *format, ...) {
+    va_list list;
+    va_start(list, format);
+
+    fprintf(stderr, "%s: ", cmd);
+    vfprintf(stderr, format, list);
+    fprintf(stderr, "\n");
+}
+
+void error(const char *format, ...) {
+    va_list list;
+    va_start(list, format);
+
+    fprintf(stderr, "%s: ", cmd);
+    vfprintf(stderr, format, list);
+    fprintf(stderr, "\n");
+    exit(EXIT_FAILURE);
+}
+
+void output(const char *format, ...) {
+    va_list list;
+    va_start(list, format);
+
+    fprintf(stdout, "%s: ", cmd);
+    vfprintf(stdout, format, list);
+    fprintf(stdout, "\n");
+}