include/: refactor header files

include/common/buf.h

@@ -0,0 +1,23 @@
+/*
+ * Very simple C buffer implementation
+ *
+ * Copyright Johan Malm 2020
+ */
+
+#ifndef BUF_H
+#define BUF_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct buf {
+	char *buf;
+	int alloc;
+	int len;
+};
+
+void buf_init(struct buf *s);
+void buf_add(struct buf *s, const char *data);
+
+#endif /* BUF_H */

include/common/bug-on.h

@@ -0,0 +1,13 @@
+#ifndef __LABWC_BUG_ON_H
+#define __LABWC_BUG_ON_H
+
+#define BUG_ON(condition)                                             \
+	do {                                                          \
+		if ((condition) != 0) {                               \
+			fprintf(stderr, "Badness in %s() at %s:%d\n", \
+				__func__, __FILE__, __LINE__);        \
+		}                                                     \
+	} while (0)
+
+#endif /* __LABWC_BUT_ON_H */
+