diff -r d7c4ba50b7d8 -r bf19378aed58 ucx/utils.h
--- a/ucx/utils.h	Fri Nov 18 13:39:20 2016 +0100
+++ b/ucx/utils.h	Fri Nov 18 15:27:45 2016 +0100
@@ -1,7 +1,7 @@
 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
- * Copyright 2015 Olaf Wintermann. All rights reserved.
+ * Copyright 2016 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:
@@ -45,11 +45,16 @@
 #include "ucx.h"
 #include "string.h"
 #include "allocator.h"
-#include <stdint.h>
+#include <inttypes.h>
 #include <string.h>
 #include <stdarg.h>
 
 /**
+ * Default buffer size for ucx_stream_copy() and ucx_stream_ncopy().
+ */
+#define UCX_STREAM_COPY_BUFSIZE 4096
+
+/**
  * Copies a string.
  * @param s the string to copy
  * @param data omitted
@@ -82,23 +87,26 @@
  * @param n the maximum number of bytes that shall be copied
  * @return the total number of bytes copied
   */
-size_t ucx_stream_copy(void *src, void *dest, read_func rfnc, write_func wfnc,
+size_t ucx_stream_bncopy(void *src, void *dest, read_func rfnc, write_func wfnc,
         char* buf, size_t bufsize, size_t n);
 
 /**
- * Shorthand for ucx_stream_copy using the default copy buffer.
+ * Shorthand for an unbounded ucx_stream_bncopy call using a default buffer.
  * 
  * @param src the source stream
  * @param dest the destination stream
  * @param rfnc the read function
  * @param wfnc the write function
  * @return total number of bytes copied
+ * 
+ * @see #UCX_STREAM_COPY_BUFSIZE
  */
-#define ucx_stream_hcopy(src,dest,rfnc,wfnc) ucx_stream_copy(\
-        src, dest, (read_func)rfnc, (write_func)wfnc, NULL, 0x100, SIZE_MAX)
+#define ucx_stream_copy(src,dest,rfnc,wfnc) ucx_stream_bncopy(\
+        src, dest, (read_func)rfnc, (write_func)wfnc, \
+        NULL, UCX_STREAM_COPY_BUFSIZE, (size_t)-1)
 
 /**
- * Shorthand for ucx_stream_copy using the default copy buffer and a copy limit.
+ * Shorthand for ucx_stream_bncopy using a default copy buffer.
  * 
  * @param src the source stream
  * @param dest the destination stream
@@ -107,8 +115,27 @@
  * @param n maximum number of bytes that shall be copied
  * @return total number of bytes copied
  */
-#define ucx_stream_ncopy(src,dest,rfnc,wfnc, n) ucx_stream_copy(\
-        src, dest, (read_func)rfnc, (write_func)wfnc, NULL, 0x100, n)
+#define ucx_stream_ncopy(src,dest,rfnc,wfnc, n) ucx_stream_bncopy(\
+        src, dest, (read_func)rfnc, (write_func)wfnc, \
+        NULL, UCX_STREAM_COPY_BUFSIZE, n)
+
+/**
+ * Shorthand for an unbounded ucx_stream_bncopy call using the specified buffer.
+ * 
+ * @param src the source stream
+ * @param dest the destination stream
+ * @param rfnc the read function
+ * @param wfnc the write function
+ * @param buf a pointer to the copy buffer or <code>NULL</code> if a buffer
+ * shall be implicitly created on the heap
+ * @param bufsize the size of the copy buffer - if <code>NULL</code> was
+ * provided for <code>buf</code>, this is the size of the buffer that shall be
+ * implicitly created
+ * @return total number of bytes copied
+ */
+#define ucx_stream_bcopy(src,dest,rfnc,wfnc, buf, bufsize) ucx_stream_bncopy(\
+        src, dest, (read_func)rfnc, (write_func)wfnc, \
+        buf, bufsize, (size_t)-1)
 
 /**
  * Wraps the strcmp function.
@@ -219,10 +246,6 @@
  */
 sstr_t ucx_asprintf(UcxAllocator *allocator, const char *fmt, ...);
 
-/** Shortcut for ucx_asprintf() with default allocator. */
-#define ucx_sprintf(fmt, ...) \
-    ucx_asprintf(ucx_default_allocator(), fmt, __VA_ARGS__)
-
 /**
  * <code>va_list</code> version of ucx_asprintf().
  * 
@@ -234,8 +257,12 @@
  */
 sstr_t ucx_vasprintf(UcxAllocator *allocator, const char *fmt, va_list ap);
 
+/** Shortcut for ucx_asprintf() with default allocator. */
+#define ucx_sprintf(...) \
+    ucx_asprintf(ucx_default_allocator(), __VA_ARGS__)
+
 /**
- * A <code>printf()</code> like function which writes the output to an
+ * A <code>printf()</code> like function which writes the output to a
  * UcxBuffer.
  * 
  * @param buffer the buffer the data is written to