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CHG: added a comment

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iceman1001 2016-07-23 18:33:30 +02:00
commit 1f1d974f02
1 changed files with 5 additions and 7 deletions
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12
client/util.c
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@ -186,19 +186,16 @@ char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
return buf; return buf;
} }
void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) {
{
while (len--) { while (len--) {
dest[len] = (uint8_t) n; dest[len] = (uint8_t) n;
n >>= 8; n >>= 8;
} }
} }
uint64_t bytes_to_num(uint8_t* src, size_t len) uint64_t bytes_to_num(uint8_t* src, size_t len) {
{
uint64_t num = 0; uint64_t num = 0;
while (len--) while (len--) {
{
num = (num << 8) | (*src); num = (num << 8) | (*src);
src++; src++;
} }
@ -212,6 +209,7 @@ void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
n >>= 1; n >>= 1;
} }
} }
//least significant bit first //least significant bit first
void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) { void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
for(int i = 0 ; i < len ; ++i) { for(int i = 0 ; i < len ; ++i) {
@ -220,7 +218,6 @@ void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
} }
} }
// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
// to // to
// hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
@ -549,6 +546,7 @@ void rol(uint8_t *data, const size_t len){
} }
// Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal // Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
// And clears the rest of the bits.
uint32_t SwapBits(uint32_t value, int nrbits) { uint32_t SwapBits(uint32_t value, int nrbits) {
uint32_t newvalue = 0; uint32_t newvalue = 0;
for(int i = 0; i < nrbits; i++) { for(int i = 0; i < nrbits; i++) {