Hexadecimal functions

int eth_is_hex(const char *str, int len)

Checks whether the given string is hex or not.

Parameters

• str – [in] Target string to check

• len – [in] Length of the input string (-1 if the string is NUL-terminated)

Returns

1 when the input is valid hex, -1 otherwise

int eth_hex_pad_left(char *dest, const char *str, int len, size_t width)

Left pads the hexadecimal input.

Parameters

• dest – [in] String to write the result to

• str – [in] Original hexadecimal value

• len – [in] Length of the input string (-1 if the string is NUL-terminated)

• width – [in] Total width of the output

Returns

1 on success, -1 otherwise

int eth_hex_pad_right(char *dest, const char *str, int len, size_t width)

Right pads the hexadecimal input.

Parameters

• dest – [in] String to write the result to

• str – [in] Original hexadecimal value

• len – [in] Length of the input string (-1 if the string is NUL-terminated)

• width – [in] Total width of the output

Returns

1 on success, -1 otherwise

int eth_hex_from_bytes(char **dest, const uint8_t *bytes, size_t len)

Converts bytes to hexadecimal string.

Parameters

• dest – [in] String to write the result to

• bytes – [in] Bytes to read the data from

• len – [in] Length of the input bytes

Returns

1 on success, -1 otherwise

int eth_hex_to_bytes(uint8_t **dest, const char *hex, int hlen)

Converts hexadecimal string to bytes.

Parameters

• dest – [in] Bytes to write the data to

• hex – [in] Hexadecimal string to read the data from

• hlen – [in] Length of hexadecimal input string

Returns

1 on success, -1 otherwise