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ADD: num_to_bytebitsLSBF function.

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ADD: lf guard clone - works...  needs some checking.
ADD: added a option to "addparity" to set zero on fixed pos.
This commit is contained in:
iceman1001 2016-02-28 22:43:21 +01:00
commit 0d2c590974
5 changed files with 121 additions and 70 deletions
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20
client/util.c
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@ -103,6 +103,7 @@ void print_hex(const uint8_t * data, const size_t len) {
printf("%02x ", data[i]);
printf("\n");
}
void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
int rownum = 0;
@ -178,6 +179,7 @@ char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);
return buf;
}
void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
{
while (len--) {
@ -197,12 +199,22 @@ uint64_t bytes_to_num(uint8_t* src, size_t len)
return num;
}
void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
// takes a number (uint64_t) and creates a binarray in dest.
void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
while (len--) {
dest[len] = n & 1;
n >>= 1;
}
}
//least significant bit first
void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest)
{
for(int i = 0 ; i < len ; ++i) {
dest[i] = n & 1;
n >>= 1;
}
}
// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
// to
@ -220,6 +232,8 @@ uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockS
return tmp;
}
// takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64),
// returns: the dest array contains the reordered src array.
void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
for (size_t i = 0; i < blockSize; i++){
@ -228,7 +242,6 @@ void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSiz
}
}
// -------------------------------------------------------------------------
// string parameters lib
// -------------------------------------------------------------------------
@ -493,6 +506,7 @@ void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
*(target)= GetParity(source + length / 2, ODD, length / 2);
}
// xor two arrays together for len items. The dst array contains the new xored values.
void xor(unsigned char * dst, unsigned char * src, size_t len) {
for( ; len > 0; len--,dst++,src++)
*dst ^= *src;
@ -502,6 +516,7 @@ int32_t le24toh (uint8_t data[3]) {
return (data[2] << 16) | (data[1] << 8) | data[0];
}
// Pack a bitarray into a uint32_t.
uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
if (len > 32) return 0;
@ -526,6 +541,7 @@ void rol(uint8_t *data, const size_t len){
data[len-1] = first;
}
// Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
uint32_t SwapBits(uint32_t value, int nrbits) {
uint32_t newvalue = 0;
for(int i = 0; i < nrbits; i++) {