crc32.c

Purpose

Two CRC32 helpers with different initialization/finalization rules.

API Reference

uint32_t XCRC32_Compute(const uint8_t *pInput, size_t nLength)

• Arguments:
  • pInput: source bytes.
  • nLength: byte count.
• Does:
  • computes CRC32 starting from 0.
• Returns:
  • computed CRC value.
  • 0 when pInput == NULL or nLength == 0.

uint32_t XCRC32_ComputeB(const uint8_t *pInput, size_t nLength)

• Arguments:
  • same shape as XCRC32_Compute.
• Does:
  • computes CRC32 starting from 0xFFFFFFFF and returns bitwise complement at the end.
• Returns:
  • computed CRC value.
  • 0 when pInput == NULL or nLength == 0.