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chg: adjusted the input parameters for crc16 implementations.

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This commit is contained in:
iceman1001 2018-01-28 12:19:04 +01:00
commit 205e4b2300
8 changed files with 206 additions and 61 deletions
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27
common/crc16.c
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@ -30,7 +30,7 @@ uint16_t update_crc16( uint16_t crc, uint8_t c ) {
// two ways.
// msb or lsb loop.
//
uint16_t crc16(uint8_t const *d, int length, uint16_t remainder, uint16_t polynomial, bool refin, bool refout) {
uint16_t crc16(uint8_t const *d, size_t length, uint16_t remainder, uint16_t polynomial, bool refin, bool refout) {
if (length == 0)
return (~remainder);
@ -63,35 +63,44 @@ uint16_t crc16(uint8_t const *d, int length, uint16_t remainder, uint16_t polyno
return remainder;
}
uint16_t crc16_ccitt(uint8_t const *d, int n) {
uint16_t crc16_ccitt(uint8_t const *d, size_t n) {
return crc16(d, n, 0xffff, CRC16_POLY_CCITT, false, false);
}
//poly=0x1021 init=0x0000 refin=true refout=true xorout=0x0000 name="KERMIT"
uint16_t crc16_ccitt_kermit(uint8_t const *message, int length){
return crc16_kermit(message, length);
uint16_t crc16_ccitt_kermit(uint8_t const *d, size_t n){
return crc16_kermit(d, n);
}
uint16_t crc16_kermit(uint8_t const *d, int n) {
uint16_t crc16_kermit(uint8_t const *d, size_t n) {
return crc16(d, n, 0x0000, CRC16_POLY_CCITT, true, true);
}
//FeliCa uses XMODEM
//poly=0x1021 init=0x0000 refin=false refout=false xorout=0x0000 name="XMODEM"
uint16_t crc16_xmodem(uint8_t const *d, int n) {
uint16_t crc16_xmodem(uint8_t const *d, size_t n) {
return crc16(d, n, 0x0000, CRC16_POLY_CCITT, false, false);
}
//ISO 15693 uses X-25, CRC_B (or 14443-3 )
//poly=0x1021 init=0xffff refin=true refout=true xorout=0xffff name="X-25"
uint16_t crc16_x25(uint8_t const *d, int n) {
uint16_t crc16_x25(uint8_t const *d, size_t n) {
uint16_t crc = crc16(d, n, 0xffff, CRC16_POLY_CCITT, true, true);
crc ^= 0xFFFF;
return crc;
}
//CRC-A (14443-3)
//poly=0x1021 init=0xc6c6 refin=true refout=true xorout=0x0000 name="CRC-A"
uint16_t crc16_a(uint8_t const *d, int n) {
uint16_t crc16_a(uint8_t const *d, size_t n) {
return crc16(d, n, 0xc6c6, 0x1021, true, true);
}
bool check_crc16_ccitt(uint8_t const *d, int n) {
//width=16 poly=0x8408 init=0xffff refin=true refout=true xorout=0x0BC3 check=0xF0B8 name="CRC-16/ICLASS"
uint16_t crc16_iclass(uint8_t const *d, size_t n) {
uint16_t crc = crc16(d, n, 0xffff, CRC16_POLY_CCITT, true, true);
crc ^= 0x0BC3;
return crc;
}
// CHECK functions.
bool check_crc16_ccitt(uint8_t const *d, size_t n) {
if (n < 3) return false;
uint16_t crc = crc16_ccitt(d, n - 2);