#ifndef _crc32_h_
#define _crc32_h_

#pragma pack(push, 1)
struct BMPHeader {
    char bfType[2];
    uint32_t bfSize;
    uint16_t bfReserved1;
    uint16_t bfReserved2;
    uint32_t bfOffBits;
    uint32_t biSize;
    int32_t  biWidth;
    int32_t  biHeight;
    uint16_t biPlanes;
    uint16_t biBitCount;
    uint32_t biCompression;
    uint32_t biSizeImage;
    int32_t  biXPelsPerMeter;
    int32_t  biYPelsPerMeter;
    uint32_t biClrUsed;
    uint32_t biClrImportant;
};
#pragma pack(pop)

#ifdef __cplusplus
extern "C" {
#endif
unsigned int crc32(unsigned int crc, const void *buf, size_t len);
void crc32init(unsigned int *crc);
void crc32update(unsigned int *crc, const void * b, size_t len);
void crc32final(unsigned int *crc);
unsigned int crcsimple(const void *buf, size_t len);
#ifdef __cplusplus
}
#endif

#endif