Fix adding long strings to builder

CHANGELOG.md

@@ -2,6 +2,12 @@
 
 All changes to the Ox gem are documented here. Releases follow semantic versioning.
 
+## [2.14.10] - 2022-03-10
+
+### Fixed
+
+- Writing strings over 16K to a file with builder no longer causes a crash.
+
 ## [2.14.9] - 2022-02-11
 
 ### Fixed

ext/ox/buf.h

@@ -86,8 +86,16 @@ buf_append_string(Buf buf, const char *s, size_t slen) {
 
 	    if (len != (size_t)write(buf->fd, buf->head, len)) {
 		buf->err = true;
+		return;
 	    }
 	    buf->tail = buf->head;
+	    if (sizeof(buf->base) <= slen) {
+		if (slen != (size_t)write(buf->fd, s, slen)) {
+		    buf->err = true;
+		    return;
+		}
+		return;
+	    }
 	} else {
 	    size_t	len = buf->end - buf->head;
 	    size_t	toff = buf->tail - buf->head;

lib/ox/version.rb

@@ -1,5 +1,5 @@
 
 module Ox
   # Current version of the module.
-  VERSION = '2.14.9'
+  VERSION = '2.14.10'
 end