diff -r d8044fd5005c -r 67fa386ce600 src/cx/buffer.h
--- a/src/cx/buffer.h	Mon Dec 09 23:31:42 2024 +0100
+++ b/src/cx/buffer.h	Tue Dec 10 00:07:16 2024 +0100
@@ -427,14 +427,14 @@
  *
  * The least significant byte of the argument is written to the buffer. If the
  * end of the buffer is reached and #CX_BUFFER_AUTO_EXTEND feature is enabled,
- * the buffer capacity is extended by cxBufferMinimumCapacity(). If the feature is
- * disabled or buffer extension fails, \c EOF is returned.
+ * the buffer capacity is extended by cxBufferMinimumCapacity(). If the feature
+ * is disabled or buffer extension fails, \c EOF is returned.
  *
  * On successful write, the position of the buffer is increased.
  *
  * @param buffer the buffer to write to
  * @param c the character to write
- * @return the byte that has bean written or \c EOF when the end of the stream is
+ * @return the byte that has been written or \c EOF when the end of the stream is
  * reached and automatic extension is not enabled or not possible
  */
 cx_attr_nonnull
@@ -444,6 +444,21 @@
 );
 
 /**
+ * Writes a terminating zero to a buffer.
+ *
+ * On successful write, \em neither the position \em nor the size of the buffer is
+ * increased.
+ *
+ * The purpose of this function is to have the written data ready to be used as
+ * a C string.
+ *
+ * @param buffer the buffer to write to
+ * @return zero, if the terminator could be written, non-zero otherwise
+ */
+cx_attr_nonnull
+int cxBufferTerminate(CxBuffer *buffer);
+
+/**
  * Writes a string to a buffer.
  *
  * @param buffer the buffer