source utility functions out to util.c

1 files changed, 37 insertions, 0 deletions

diff --git a/util.c b/util.c
new file mode 100644
index 0000000..f8b9eee
--- /dev/null
+++ b/util.c
@@ -0,0 +1,37 @@
+/* See LICENSE file for copyright and license details. */
+#include "util.h"
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void *
+emallocz(unsigned int size) {
+        void *res = calloc(1, size);
+
+        if(!res)
+                eprint("fatal: could not malloc() %u bytes\n", size);
+        return res;
+}
+
+void
+eprint(const char *errstr, ...) {
+        va_list ap;
+
+        va_start(ap, errstr);
+        vfprintf(stderr, errstr, ap);
+        va_end(ap);
+        exit(EXIT_FAILURE);
+}
+
+void
+eprintn(const char *errstr, ...) {
+        va_list ap;
+
+        va_start(ap, errstr);
+        vfprintf(stderr, errstr, ap);
+        va_end(ap);
+        fprintf(stderr, ": %s\n", strerror(errno));
+        exit(EXIT_FAILURE);
+}