text: #include "lfs_util.h"
  
  // Software CRC implementation with small lookup table
  void lfs_crc(uint32_t *restrict crc, const void *buffer, size_t size) {
      static const uint32_t rtable[16] = {
          0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
          0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
          0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
          0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c,
      };
  
      const uint8_t *data = buffer;
  
      for (size_t i = 0; i < size; i++) {
          *crc = (*crc >> 4) ^ rtable[(*crc ^ (data[i] >> 0)) & 0xf];
          *crc = (*crc >> 4) ^ rtable[(*crc ^ (data[i] >> 4)) & 0xf];
      }
  }
  