Splitting into separate files.

abuf.h

@@ -0,0 +1,27 @@
+/*
+ * abuf.h - append/prepend buffer utilities
+ */
+#ifndef ABUF_H
+#define ABUF_H
+
+#include <stddef.h>
+
+
+typedef struct abuf {
+    char	*b;
+    size_t	 size;
+    size_t	 cap;
+} abuf;
+
+#define ABUF_INIT {NULL, 0, 0}
+
+
+void		 ab_init(abuf *buf);
+void		 ab_appendch(abuf *buf, char c);
+void		 ab_append(abuf *buf, const char *s, size_t len);
+void		 ab_prependch(abuf *buf, const char c);
+void		 ab_prepend(abuf *buf, const char *s, const size_t len);
+void		 ab_free(abuf *buf);
+
+
+#endif