---

hitachi.c File Reference

#include <string.h>

Go to the source code of this file.

Functions
char	minus4 (char car, int *carry)
	Subtract 4 from a given digit. More...
char	minus1 (char car, int *carry)
	Subtract 1 from a given digit. More...
char *	calculate_mac (char *haddr)
	Subtract 4 from a given number writen in hexadecimal. More...

---

Detailed Description

This file implements special Hitachi's MAC address processing.

Definition in file hitachi.c.

---

Function Documentation

char* calculate_mac (  char *    haddr )

Subtract 4 from a given number writen in hexadecimal. Author: Denis BEURIVE Parameters: haddr  Pointer to a zero terminated string of characters that represents the number writen in hexadecimal base. Returns: The function returns a pointer to "haddr". The string "haddr" now represents the value "haddr-4". Warning: This function modifies the content of the string pointed by "haddr"). If macro "USE_PLUGINS" is defined, then the function returns a pointer to a statically allocated buffer. Otherwize, the function returns "haddr" itself. Remarks: This function should be used to calculate the MAC address of an HITACHI modem. Definition at line 97 of file hitachi.c. References minus1(), and minus4().

char minus1 (  char    car, int *    carry )  [static]

Subtract 1 from a given digit. Author: Denis BEURIVE Parameters: car  Hexadecimal character that represents the digit. carry  Pointer to an integer that will be used to signal a possible crry. The value pointed by "carry" can be: 0: no carry. 1: carry. Returns: The function returns the value "car-1" in hexadecimal. Definition at line 60 of file hitachi.c. Referenced by calculate_mac().

char minus4 (  char    car, int *    carry )  [static]

Subtract 4 from a given digit. Author: Denis BEURIVE Parameters: car  Hexadecimal character that represents the digit. carry  Pointer to an integer that will be used to signal a possible crry. The value pointed by "carry" can be: 0: no carry. 1: carry. Returns: The function returns the value "car-4" in hexadecimal. Definition at line 22 of file hitachi.c. Referenced by calculate_mac().

---