diff -r 11f3bb408051 -r 62921b370c60 ucx/utils.c
--- a/ucx/utils.c	Wed Nov 22 12:59:13 2017 +0100
+++ b/ucx/utils.c	Sun Jan 21 12:13:09 2018 +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:
@@ -33,22 +33,22 @@
 #include <errno.h>
 
 /* COPY FUCNTIONS */
-void* ucx_strcpy(void* s, void* data) {
-    char *str = (char*) s;
+void* ucx_strcpy(const void* s, void* data) {
+    const char *str = (const char*) s;
     size_t n = 1+strlen(str);
     char *cpy = (char*) malloc(n);
     memcpy(cpy, str, n);
     return cpy;
 }
 
-void* ucx_memcpy(void* m, void* n) {
+void* ucx_memcpy(const void* m, void* n) {
     size_t k = *((size_t*)n);
     void *cpy = malloc(k);
     memcpy(cpy, m, k);
     return cpy;
 }
 
-size_t ucx_stream_copy(void *src, void *dest, read_func readfnc,
+size_t ucx_stream_bncopy(void *src, void *dest, read_func readfnc,
         write_func writefnc, char* buf, size_t bufsize, size_t n) {
     if(n == 0 || bufsize == 0) {
         return 0;
@@ -87,17 +87,17 @@
 
 /* COMPARE FUNCTIONS */
 
-int ucx_strcmp(void *s1, void *s2, void *data) {
-    return strcmp((char*)s1, (char*)s2);
+int ucx_strcmp(const void *s1, const void *s2, void *data) {
+    return strcmp((const char*)s1, (const char*)s2);
 }
 
-int ucx_strncmp(void *s1, void *s2, void *n) {
-    return strncmp((char*)s1, (char*)s2, *((size_t*) n));
+int ucx_strncmp(const void *s1, const void *s2, void *n) {
+    return strncmp((const char*)s1, (const char*)s2, *((size_t*) n));
 }
 
-int ucx_intcmp(void *i1, void *i2, void *data) {
-   int a = *((int*) i1);
-   int b = *((int*) i2);
+int ucx_intcmp(const void *i1, const void *i2, void *data) {
+   int a = *((const int*) i1);
+   int b = *((const int*) i2);
    if (a == b) {
        return 0;
    } else {
@@ -105,9 +105,9 @@
    }
 }
 
-int ucx_floatcmp(void *f1, void *f2, void *epsilon) {
-   float a = *((float*) f1);
-   float b = *((float*) f2);
+int ucx_floatcmp(const void *f1, const void *f2, void *epsilon) {
+   float a = *((const float*) f1);
+   float b = *((const float*) f2);
    float e = !epsilon ? 1e-6f : *((float*)epsilon);
    if (fabsf(a - b) < e) {
        return 0;
@@ -116,9 +116,9 @@
    }
 }
 
-int ucx_doublecmp(void *d1, void *d2, void *epsilon) {
-   double a = *((float*) d1);
-   double b = *((float*) d2);
+int ucx_doublecmp(const void *d1, const void *d2, void *epsilon) {
+   double a = *((const double*) d1);
+   double b = *((const double*) d2);
    double e = !epsilon ? 1e-14 : *((double*)epsilon);
    if (fabs(a - b) < e) {
        return 0;
@@ -127,9 +127,9 @@
    }
 }
 
-int ucx_ptrcmp(void *ptr1, void *ptr2, void *data) {
-    intptr_t p1 = (intptr_t) ptr1;
-    intptr_t p2 = (intptr_t) ptr2;
+int ucx_ptrcmp(const void *ptr1, const void *ptr2, void *data) {
+    const intptr_t p1 = (const intptr_t) ptr1;
+    const intptr_t p2 = (const intptr_t) ptr2;
     if (p1 == p2) {
         return 0;
     } else {
@@ -137,7 +137,7 @@
     }
 }
 
-int ucx_memcmp(void *ptr1, void *ptr2, void *n) {
+int ucx_memcmp(const void *ptr1, const void *ptr2, void *n) {
     return memcmp(ptr1, ptr2, *((size_t*)n));
 }