1 files changed, 17 insertions, 0 deletions
diff --git a/fmt_asn1tagint.c b/fmt_asn1tagint.c
new file mode 100644
index 0000000..338d7bf
--- /dev/null
+++ b/fmt_asn1tagint.c
@@ -0,0 +1,17 @@
+#include "asn1.h"
+
+size_t fmt_asn1tagint(char* dest,unsigned long l) {
+  size_t needed=((sizeof l)*7)/8,i;
+  for (i=1; i<needed; ++i)
+    if (!(l>>(i*7)))
+      break;
+  if (dest) {
+    size_t j=i;
+    while (j) {
+      --j;
+      *dest=((l>>(j*7))&0x7f) + (j?0x80:0);
+      ++dest;
+    }
+  }
+  return i;
+}