first shot at "addrequest" support

fmt_asn1string.c

@@ -1,8 +1,9 @@
 #include "asn1.h"
 #include "byte.h"
 
-unsigned int fmt_asn1string(char* dest,enum asn1_tagclass tc,enum asn1_tagtype tt,enum asn1_tag tag,const char* c,unsigned long l) {
-  int len;
+size_t fmt_asn1string(char* dest,enum asn1_tagclass tc,enum asn1_tagtype tt,enum asn1_tag tag,const char* c,size_t l) {
+  size_t len;
+  if (l>(size_t)-100) return (size_t)-1;
   len=fmt_asn1transparent(dest,tc,tt,tag,l);
   if (dest) byte_copy(dest+len,l,c);
   return len+l;