StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
text
Body
copied!<p><code>rev16(crc16(0, buf, len))</code> will give you the CRCs listed.</p> <pre><code>#include <stdio.h> static unsigned short crc16_table[] = { 0x0000, 0xa001, 0xe003, 0x4002, 0x6007, 0xc006, 0x8004, 0x2005, 0xc00e, 0x600f, 0x200d, 0x800c, 0xa009, 0x0008, 0x400a, 0xe00b, 0x201d, 0x801c, 0xc01e, 0x601f, 0x401a, 0xe01b, 0xa019, 0x0018, 0xe013, 0x4012, 0x0010, 0xa011, 0x8014, 0x2015, 0x6017, 0xc016, 0x403a, 0xe03b, 0xa039, 0x0038, 0x203d, 0x803c, 0xc03e, 0x603f, 0x8034, 0x2035, 0x6037, 0xc036, 0xe033, 0x4032, 0x0030, 0xa031, 0x6027, 0xc026, 0x8024, 0x2025, 0x0020, 0xa021, 0xe023, 0x4022, 0xa029, 0x0028, 0x402a, 0xe02b, 0xc02e, 0x602f, 0x202d, 0x802c, 0x8074, 0x2075, 0x6077, 0xc076, 0xe073, 0x4072, 0x0070, 0xa071, 0x407a, 0xe07b, 0xa079, 0x0078, 0x207d, 0x807c, 0xc07e, 0x607f, 0xa069, 0x0068, 0x406a, 0xe06b, 0xc06e, 0x606f, 0x206d, 0x806c, 0x6067, 0xc066, 0x8064, 0x2065, 0x0060, 0xa061, 0xe063, 0x4062, 0xc04e, 0x604f, 0x204d, 0x804c, 0xa049, 0x0048, 0x404a, 0xe04b, 0x0040, 0xa041, 0xe043, 0x4042, 0x6047, 0xc046, 0x8044, 0x2045, 0xe053, 0x4052, 0x0050, 0xa051, 0x8054, 0x2055, 0x6057, 0xc056, 0x205d, 0x805c, 0xc05e, 0x605f, 0x405a, 0xe05b, 0xa059, 0x0058, 0xa0e9, 0x00e8, 0x40ea, 0xe0eb, 0xc0ee, 0x60ef, 0x20ed, 0x80ec, 0x60e7, 0xc0e6, 0x80e4, 0x20e5, 0x00e0, 0xa0e1, 0xe0e3, 0x40e2, 0x80f4, 0x20f5, 0x60f7, 0xc0f6, 0xe0f3, 0x40f2, 0x00f0, 0xa0f1, 0x40fa, 0xe0fb, 0xa0f9, 0x00f8, 0x20fd, 0x80fc, 0xc0fe, 0x60ff, 0xe0d3, 0x40d2, 0x00d0, 0xa0d1, 0x80d4, 0x20d5, 0x60d7, 0xc0d6, 0x20dd, 0x80dc, 0xc0de, 0x60df, 0x40da, 0xe0db, 0xa0d9, 0x00d8, 0xc0ce, 0x60cf, 0x20cd, 0x80cc, 0xa0c9, 0x00c8, 0x40ca, 0xe0cb, 0x00c0, 0xa0c1, 0xe0c3, 0x40c2, 0x60c7, 0xc0c6, 0x80c4, 0x20c5, 0x209d, 0x809c, 0xc09e, 0x609f, 0x409a, 0xe09b, 0xa099, 0x0098, 0xe093, 0x4092, 0x0090, 0xa091, 0x8094, 0x2095, 0x6097, 0xc096, 0x0080, 0xa081, 0xe083, 0x4082, 0x6087, 0xc086, 0x8084, 0x2085, 0xc08e, 0x608f, 0x208d, 0x808c, 0xa089, 0x0088, 0x408a, 0xe08b, 0x60a7, 0xc0a6, 0x80a4, 0x20a5, 0x00a0, 0xa0a1, 0xe0a3, 0x40a2, 0xa0a9, 0x00a8, 0x40aa, 0xe0ab, 0xc0ae, 0x60af, 0x20ad, 0x80ac, 0x40ba, 0xe0bb, 0xa0b9, 0x00b8, 0x20bd, 0x80bc, 0xc0be, 0x60bf, 0x80b4, 0x20b5, 0x60b7, 0xc0b6, 0xe0b3, 0x40b2, 0x00b0, 0xa0b1}; static unsigned char rev_table[] = { 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff}; unsigned crc16(unsigned crc, unsigned char *buf, int len) { while (len--) { crc ^= *buf++ << 8; crc = (crc << 8) ^ crc16_table[(crc >> 8) & 0xff]; } return crc & 0xffff; } inline unsigned rev16(unsigned val) { return (rev_table[val & 0xff] << 8) | rev_table[(val >> 8) & 0xff]; } </code></pre>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload