X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/8f51ddb0bd8fb7536a07966433061f03d45f65e0..5f91a683b7f3b3b9217db9407a13b1d738070f01:/armsrc/util.c

diff --git a/armsrc/util.c b/armsrc/util.c
index 00dbdbb8..f2298290 100644
--- a/armsrc/util.c
+++ b/armsrc/util.c
@@ -12,6 +12,19 @@
 #include "util.h"
 #include "string.h"
 
+size_t nbytes(size_t nbits) {
+	return (nbits/8)+((nbits%8)>0);
+}
+
+uint32_t SwapBits(uint32_t value, int nrbits) {
+	int i;
+	uint32_t newvalue = 0;
+	for(i = 0; i < nrbits; i++) {
+		newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
+	}
+	return newvalue;
+}
+
 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
 {
 	while (len--) {