#include <tau/tau.h>
#include <libmseed.h>

/* Test vector structure */
struct crc32c_testvec
{
  uint8_t input[240];
  size_t insize;
  uint32_t expected;
};

/* CRC32C test vectors, adapted from linux crypto/testmgr.h and leveldb crc32c_test */
static const struct crc32c_testvec crc32c_testvectors[] = {
    {.input    = {0x61},
     .insize   = 1,
     .expected = 0xc1d04330},
    {.input    = "123456789",
     .insize   = 9,
     .expected = 0xe3069283},
    {.input    = {0x66, 0x6f, 0x6f},
     .insize   = 3,
     .expected = 0xcfc4ae1d},
    {.input    = {0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x77, 0x6f,
                  0x72, 0x6c, 0x64},
     .insize   = 11,
     .expected = 0xc99465aa},
    {.input    = {0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x20},
     .insize   = 6,
     .expected = 0x7e627e58},
    {.input    = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
     .insize   = 32,
     .expected = 0x8a9136aa},
    {.input    = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
                  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
                  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
                  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
     .insize   = 32,
     .expected = 0x62a8ab43},
    {.input    = {0x1f, 0x1e, 0x1d, 0x1c, 0x1b, 0x1a, 0x19, 0x18,
                  0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10,
                  0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08,
                  0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00},
     .insize   = 32,
     .expected = 0x113fdb5c},
    {.input    = {0x01, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                  0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00,
                  0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x18,
                  0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
     .insize   = 48,
     .expected = 0xd9963a56},
    {.input    = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
                  0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
                  0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
                  0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f},
     .insize   = 32,
     .expected = 0x46dd794e},
    {.input    = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
                  0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
                  0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
                  0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
                  0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28},
     .insize   = 40,
     .expected = 0x0e2c157f},
    {.input    = {0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
                  0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
                  0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40,
                  0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
                  0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50},
     .insize   = 40,
     .expected = 0xe980ebf6},
    {.input    = {0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
                  0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60,
                  0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
                  0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70,
                  0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78},
     .insize   = 40,
     .expected = 0xde74bded},
    {.input    = {0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80,
                  0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
                  0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90,
                  0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
                  0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0},
     .insize   = 40,
     .expected = 0xd579c862},
    {.input    = {0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
                  0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0,
                  0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8,
                  0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0,
                  0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8},
     .insize   = 40,
     .expected = 0xba979ad0},
    {.input    = {0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0,
                  0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8,
                  0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0,
                  0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8,
                  0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0},
     .insize   = 40,
     .expected = 0x2b29d913},
    {.input    = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
                  0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
                  0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
                  0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
                  0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
                  0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
                  0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
                  0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40,
                  0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
                  0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50,
                  0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
                  0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60,
                  0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
                  0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70,
                  0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
                  0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80,
                  0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
                  0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90,
                  0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
                  0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0,
                  0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
                  0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0,
                  0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8,
                  0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0,
                  0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8,
                  0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0,
                  0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8,
                  0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0,
                  0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8,
                  0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0},
     .insize   = 240,
     .expected = 0x24c5d375},
    {.insize = 0},
};

TEST(CRC, CRC32C) {
  const struct crc32c_testvec *tv;
  uint32_t result;
  int count;

  /* Loop through test vectors, testing CRC result against expected */
  for (tv = &crc32c_testvectors[0], count = 1;
       tv->insize != 0;
       tv++, count++)
  {
    result = ms_crc32c (tv->input, tv->insize, 0);

    CHECK (result == tv->expected, "CRC-32C test vector failure");
  }

  /* Error test */
  result = ms_crc32c (NULL, 0, 0);
  CHECK (result == 0, "CRC-32C NULL input test failure");

  result = ms_crc32c ((const uint8_t *)"SOMEDATA", 0, 0);
  CHECK (result == 0, "CRC-32C NULL input test failure");
}