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Restructure to get rid of size limit. 

Fix return value bug.
This commit is contained in:
augustss 2001-12-06 00:17:12 +00:00
parent 5ef96ebab2
commit 604ea366d4
1 changed files with 20 additions and 15 deletions
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35
sys/dev/ir/sir.c
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@ -1,4 +1,4 @@
/* $NetBSD: sir.c,v 1.1 2001/12/05 14:50:14 augustss Exp $ */
/* $NetBSD: sir.c,v 1.2 2001/12/06 00:17:12 augustss Exp $ */
/*
* Copyright (c) 2001 The NetBSD Foundation, Inc.
@ -97,10 +97,12 @@ const u_int16_t irda_fcstab[] = {
PUTC(c); \
}
#define CHUNK 512
int
irda_sir_frame(u_int8_t *obuf, u_int maxlen, struct uio *uio, u_int ebofs)
{
u_int8_t ibuf[MAX_IRDA_FRAME];
u_int8_t ibuf[CHUNK];
u_int8_t *p, *end, *cp;
size_t n;
int error;
@ -108,25 +110,28 @@ irda_sir_frame(u_int8_t *obuf, u_int maxlen, struct uio *uio, u_int ebofs)
int c;
u_int16_t ofcs;
n = uio->uio_resid;
if (n > MAX_IRDA_FRAME)
return (EINVAL);
error = uiomove(ibuf, n, uio);
if (error)
return (-error);
end = obuf + maxlen;
p = obuf;
end = p + maxlen;
for (i = 0; i < ebofs; i++)
PUTC(SIR_EXTRA_BOF);
PUTC(SIR_BOF);
ofcs = INITFCS;
cp = ibuf;
while (n-- > 0) {
c = *cp++;
ofcs = updateFCS(ofcs, c);
PUTESC(c);
while (uio->uio_resid > 0) {
n = uio->uio_resid;
if (n > CHUNK)
n = CHUNK;
error = uiomove(ibuf, n, uio);
if (error)
return (-error);
cp = ibuf;
while (n-- > 0) {
c = *cp++;
ofcs = updateFCS(ofcs, c);
PUTESC(c);
}
}
ofcs = ~ofcs;