projects
/
unix-history
/ blob
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
tags
|
clone url
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
blame
|
history
|
raw
|
HEAD
BSD 3 development
[unix-history]
/
usr
/
src
/
cmd
/
uucp
/
chksum.c
main
()
{
int
i
,
j
;
char
buf
[
300
];
for
(
i
=
0
;
i
<
300
;
i
++)
buf
[
i
] =
i
;
printf
(
"%o
\n
"
,
chksum
(
buf
,
300
));
}
chksum
(
s
,
n
)
register
char
*
s
;
register
n
;
{
register
short
sum
;
register
unsigned
t
;
register
x
;
sum
= -
1
;
x
=
0
;
do
{
if
(
sum
<
0
) {
sum
<<=
1
;
sum
++;
}
else
sum
<<=
1
;
t
=
sum
;
sum
+= (
unsigned
)*
s
++;
x
+=
sum
^
n
;
if
((
unsigned
)
sum
<=
t
) {
sum
^=
x
;
}
}
while
(--
n
>
0
);
return
(
sum
);
}