Lean and mean initial commit

Not much functionality yet

1 files changed, 15 insertions, 0 deletions

diff --git a/fmt_asn1tag.c b/fmt_asn1tag.c
new file mode 100644
index 0000000..b2bd1a0
--- /dev/null
+++ b/fmt_asn1tag.c
@@ -0,0 +1,15 @@
+#include "asn1.h"
+
+/* write int in least amount of bytes, return number of bytes */
+/* as used in ASN.1 tags */
+size_t fmt_asn1tag(char* dest,enum asn1_tagclass tc,enum asn1_tagtype tt,unsigned long l) {
+  /* encoding is either l%128 or (0x1f,...) */
+  if (l<0x1f) {
+    if (dest) *dest=(int)tc+(int)tt+(l&0x1f);
+    return 1;
+  }
+  if (dest) {
+    *dest=(int)tc+(int)tt+0x1f; ++dest;
+  }
+  return fmt_asn1tagint(dest,l)+1;
+}