diff -r 947843245525 -r e7e56c56d126 ucx/string.c
--- a/ucx/string.c	Thu Oct 15 16:36:07 2015 +0200
+++ b/ucx/string.c	Thu Oct 15 16:55:10 2015 +0200
@@ -339,3 +339,35 @@
             suffix.ptr, suffix.length) == 0;
     }
 }
+
+sstr_t sstrlower(sstr_t string) {
+    sstr_t ret = sstrdup(string);
+    for (size_t i = 0; i < ret.length ; i++) {
+        ret.ptr[i] = tolower(ret.ptr[i]);
+    }
+    return ret;
+}
+
+sstr_t sstrlower_a(UcxAllocator *allocator, sstr_t string) {
+    sstr_t ret = sstrdup_a(allocator, string);
+    for (size_t i = 0; i < ret.length ; i++) {
+        ret.ptr[i] = tolower(ret.ptr[i]);
+    }
+    return ret;
+}
+
+sstr_t sstrupper(sstr_t string) {
+    sstr_t ret = sstrdup(string);
+    for (size_t i = 0; i < ret.length ; i++) {
+        ret.ptr[i] = toupper(ret.ptr[i]);
+    }
+    return ret;
+}
+
+sstr_t sstrupper_a(UcxAllocator *allocator, sstr_t string) {
+    sstr_t ret = sstrdup_a(allocator, string);
+    for (size_t i = 0; i < ret.length ; i++) {
+        ret.ptr[i] = toupper(ret.ptr[i]);
+    }
+    return ret;
+}