Add must_malloc helper function

malloc(3) can fail, most likely in out-of-memory situations. This helper
terminates the program in such cases instead of permitting assignments
of null pointers.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
new file mode 100644
index 0000000..d34b722
--- /dev/null
+++ b/src/util.c
@@ -0,0 +1,11 @@
+#include <stdlib.h>
+
+void *
+must_malloc(size_t size)
+{
+	void *ret = malloc(size);
+	if (ret == NULL) {
+		fprintf(stderr, "out of memory\n");
+		exit(EXIT_ABNORMAL);
+	}
+}