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| | | #ifndef CRC_ITU_T_H
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| | | #define CRC_ITU_T_H
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| | | #define IoT_MAGIC_CRC 0x1E50
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| | | #define MAGIC_CRC 0x1E50
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| | | extern const unsigned short crc_itu_t_table[256];
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| | | /**
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| | | * crc_itu_t - Compute the CRC-ITU-T for the data buffer
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| | | *
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| | | * @crc: previous CRC value, we use $IoT_MAGIC_CRC
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| | | * @buffer: data pointer
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| | | * @len: number of bytes in the buffer
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| | | *
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| | | * Returns the updated CRC value
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| | | */
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| | | extern unsigned short crc_itu_t(unsigned short magic_crc, const unsigned char *buffer, unsigned int len);
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| | | /*
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| | | * ushort_to_bytes - Convert unsigned short CRC16 value to two bytes
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| | | * @bytes: two bytes CRC16 value saving buffer, buffer size must more than 2 bytes
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| | | * @crc: crc_itu_t() compute returnd value( unsigned short CRC16 checksum)
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| | | */
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| | | extern int ushort_to_bytes(unsigned char *bytes, unsigned short val);
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| | | /*
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| | | * bytes_to_ushort - Convert two bytes mode CRC value into unsigned short CRC16 value |
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| | | * @bytes: bytes mode CRC value first byte position
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| | | * @len: bytes mode CRC value length
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| | | */
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| | | extern unsigned short bytes_to_ushort(unsigned char *bytes, int len);
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| | | extern unsigned short crc_itu_t(unsigned short crc, const unsigned char *buffer, unsigned int len);
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| | | static inline unsigned short crc_itu_t_byte(unsigned short crc, const unsigned char data)
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| | | {
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