Lean and mean initial commit

Not much functionality yet

1 files changed, 20 insertions, 0 deletions

diff --git a/fmt_asn1intpayload.c b/fmt_asn1intpayload.c
new file mode 100644
index 0000000..15e71ca
--- /dev/null
+++ b/fmt_asn1intpayload.c
@@ -0,0 +1,20 @@
+#include "asn1.h"
+
+size_t fmt_asn1intpayload(char* dest,unsigned long l) {
+  size_t needed=sizeof l,i,fixup;
+  for (i=1; i<needed; ++i) {
+    if (!(l>>(i*8)))
+      break;
+  }
+  fixup=(l>>((i-1)*8))&0x80 ? 1 : 0;
+  if (dest) {
+    size_t j=i;
+    if (fixup) *dest++=0;
+    while (j) {
+      --j;
+      *dest=(l>>(j*8))&0xff;
+      ++dest;
+    }
+  }
+  return i+fixup;
+}