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HAM Radio 1
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HamRadio.cdr
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misc
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tcpipsrc
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foo.c
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1991-01-31
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717b
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36 lines
#define NROUTE 5
unsigned short Hashtab[256];
typedef unsigned short int16;
typedef long int32;
#define hiword(x) ((int16)((x) >> 16))
#define loword(x) ((int16)(x))
#define hibyte(x) ((unsigned char)((x) >> 8))
#define lobyte(x) ((unsigned char)(x))
#define hash_ip(x)\
(Hashtab[((unsigned char)(x) >> 24) ^ \
((unsigned char)(x)>>16) ^ \
((unsigned char)(x)>>8) ^ \
((unsigned char)x)])
unsigned short
foo(addr)
long addr;
{
return hash_ip(addr);
}
/* Compute hash function on IP address */
unsigned short
oldhash_ip(addr)
register unsigned long addr;
{
register unsigned short ret;
ret = hiword(addr);
ret ^= loword(addr);
return (unsigned short)(ret % NROUTE);
}