thodg/ext4fs/crc32c.c

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• Author : Thomas de Grivel
  Date : 2025-07-22 23:18:41
  Hash : b4913eb1
  Message : wip crc32c

• crc32c.c

• /* ext4fs
   * Copyright 2025 kmx.io <contact@kmx.io>
   *
   * Permission is hereby granted to use this software granted the above
   * copyright notice and this permission paragraph are included in all
   * copies and substantial portions of this software.
   *
   * THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
   * PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
   * AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
   * THIS SOFTWARE.
   */
  #include <crc32c.h>
  
  #include "crc32c_table/crc32c_table.h"
  
  uint32_t crc32c (uint32_t crc, const void *data, size_t len)
  {
    const uint8_t *p = data;
    crc = ~crc;
    while (len--)
      crc = (crc >> 8) ^ crc32c_table[(crc & 0xFF) ^ *p++];
    return ~crc;
  }