diff -r 21274e5950af -r a1f4cb076d2f src/server/util/writer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/server/util/writer.h	Sat Sep 24 16:26:10 2022 +0200
@@ -0,0 +1,71 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2018 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef WRITER_H
+#define WRITER_H
+
+#include "../public/nsapi.h"
+#include <ucx/string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef ssize_t (*wr_writefunc)(void *, const char *, size_t);
+    
+typedef struct Writer {
+    void *fd;
+    wr_writefunc write;
+    char *buffer;
+    size_t size;
+    size_t pos;
+    int error;
+} Writer;
+
+
+
+void writer_init(Writer *w, SYS_NETFD fd, char *buf, size_t len);
+
+void writer_init_with_stream(Writer *w, void *stream, wr_writefunc writefunc, char *buf, size_t len);
+
+int writer_flush(Writer *w);
+
+int writer_put(Writer *w, const char *s, size_t len);
+
+int writer_puts(Writer *w, sstr_t s);
+
+int writer_putc(Writer *w, char c);
+
+int writer_fwrite(const void *s, size_t size, size_t nelem, Writer *w);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* WRITER_H */
+