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kernel
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Save ~100 bytes by replacing s->sft_flags with flags, 

s->sft_dev->dh_attr with attr and simplifying the if() statement a bit


git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@757 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2004-01-26 19:43:06 +00:00
parent eecbe8439a
commit 44e4319e93
1 changed files with 15 additions and 13 deletions
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28
kernel/ioctl.c
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@ -85,13 +85,16 @@ COUNT DosDevIOctl(lregs * r)
return DE_INVLDHNDL;
switch (r->AL)
{
{
unsigned attr = s->sft_dev->dh_attr;
unsigned flags = s->sft_flags;
case 0x00:
/* Get the flags from the SFT */
if (s->sft_flags & SFT_FDEVICE)
r->AX = (s->sft_dev->dh_attr & 0xff00) | s->sft_flags_lo;
if (flags & SFT_FDEVICE)
r->AX = (attr & 0xff00) | (flags & 0xff);
else
r->AX = s->sft_flags;
r->AX = flags;
/* Undocumented result, Ax = Dx seen using Pcwatch */
r->DX = r->AX;
break;
@ -99,7 +102,7 @@ COUNT DosDevIOctl(lregs * r)
case 0x01:
/* sft_flags is a file, return an error because you */
/* can't set the status of a file. */
if (!(s->sft_flags & SFT_FDEVICE))
if (!(flags & SFT_FDEVICE))
return DE_INVLDFUNC;
/* Set it to what we got in the DL register from the */
@ -116,7 +119,7 @@ COUNT DosDevIOctl(lregs * r)
goto IoCharCommon;
case 0x06:
if (s->sft_flags & SFT_FDEVICE)
if (flags & SFT_FDEVICE)
{
nMode = C_ISTAT;
goto IoCharCommon;
@ -125,7 +128,7 @@ COUNT DosDevIOctl(lregs * r)
break;
case 0x07:
if (s->sft_flags & SFT_FDEVICE)
if (flags & SFT_FDEVICE)
{
nMode = C_OSTAT;
goto IoCharCommon;
@ -134,7 +137,7 @@ COUNT DosDevIOctl(lregs * r)
break;
case 0x0a:
r->DX = s->sft_flags;
r->DX = flags;
r->AX = 0;
break;
@ -145,12 +148,11 @@ COUNT DosDevIOctl(lregs * r)
case 0x10:
nMode = C_IOCTLQRY;
IoCharCommon:
if ((s->sft_flags & SFT_FDEVICE) &&
( ((r->AL == 0x02) && (s->sft_dev->dh_attr & SFT_FIOCTL))
|| ((r->AL == 0x03) && (s->sft_dev->dh_attr & SFT_FIOCTL))
if ((flags & SFT_FDEVICE) &&
( ((r->AL == 0x02 || r->AL == 0x03) && (attr & ATTR_IOCTL))
|| r->AL == 0x06 || r->AL == 0x07
|| ((r->AL == 0x10) && (s->sft_dev->dh_attr & ATTR_QRYIOCTL))
|| ((r->AL == 0x0c) && (s->sft_dev->dh_attr & ATTR_GENIOCTL))))
|| ((r->AL == 0x10) && (attr & ATTR_QRYIOCTL))
|| ((r->AL == 0x0c) && (attr & ATTR_GENIOCTL))))
{
CharReqHdr.r_unit = 0;
CharReqHdr.r_command = nMode;