add normalize_dn

normalize_dn.c

@@ -0,0 +1,26 @@
+#include <stddef.h>
+#include <ctype.h>
+
+/* "ou=fnord; O=fefe; c=de" -> "ou=fnord,o=fefe,c=de" */
+/* returns the length of the new string */
+size_t normalize_dn(char* dest,const char* src,int len) {
+  int makelower=1;
+  char* orig=dest;
+  while (len) {
+    if (*src==';' || *src==',') {
+      *dest=',';
+      while (len>1 && src[1]==' ') { ++src; --len; }
+      makelower=1;
+    } else {
+      if (makelower)
+	*dest=tolower(*src);
+      else
+	*dest=*src;
+      if (*dest=='=') makelower=0;
+    }
+    ++dest;
+    ++src;
+    --len;
+  }
+  return dest-orig;
+}