Fixed System 7.5 bug

This commit is contained in:
Zane Kaminski 2020-07-11 22:41:51 -04:00
parent dd24df4f34
commit 772bdd2881
8 changed files with 225 additions and 187 deletions

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@ -25,7 +25,7 @@ obj/entry_rel.sym: obj obj/entry.o
obj/rdisk.o: rdisk.c obj
$(CC) -c -O1 $< -o $@
$(CC) -c -Os $< -o $@
obj/rdisk.s: obj obj/rdisk.o
$(OBJDUMP) -d obj/rdisk.o > $@

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@ -56,11 +56,5 @@ ImmedRTS:
rts
Queued:
tst.w %D0
ble.b MyIODone
clr.w %D0
rts
MyIODone:
move.l JIODone, -(%SP)
rts

378
rdisk.c
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@ -8,7 +8,90 @@
#include "rdisk.h"
const char RDiskIcon[285] = {
#ifdef RDISK_COMPRESS_ICON
#include <Quickdraw.h>
const char const RDiskIconCompressed[92] = {
-1 * (80 - 1), 0b00000000, /*
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000, */
-1 * (4 - 1), 0b11111111, /*
0b11111111, 0b11111111, 0b11111111, 0b11111111, */
(40 - 1),
0b11111111, 0b11111111, 0b11111111, 0b11111111,
0b10000000, 0b00000000, 0b00000000, 0b00000001,
0b10001111, 0b00011110, 0b00111100, 0b01111001,
0b10001001, 0b00010010, 0b00100100, 0b01001001,
0b10001001, 0b00010010, 0b00100100, 0b01001001,
0b10001001, 0b00010010, 0b00100100, 0b01001001,
0b10001111, 0b00011110, 0b00111100, 0b01111001,
0b11000000, 0b00000000, 0b00000000, 0b00000001,
0b01010101, 0b01010101, 0b11010101, 0b01010101,
0b01111111, 0b11111111, 0b01111111, 0b11111111,
-1 * (8 - 1), 0b00000000, /*
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000, */
-1 * (80 - 1), 0b00000000, /*
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000, */
-1 * (32 - 1), 0b11111111, /*
0b11111111, 0b11111111, 0b11111111, 0b11111111,
0b11111111, 0b11111111, 0b11111111, 0b11111111,
0b11111111, 0b11111111, 0b11111111, 0b11111111,
0b11111111, 0b11111111, 0b11111111, 0b11111111,
0b11111111, 0b11111111, 0b11111111, 0b11111111,
0b11111111, 0b11111111, 0b11111111, 0b11111111,
0b11111111, 0b11111111, 0b11111111, 0b11111111,
0b11111111, 0b11111111, 0b11111111, 0b11111111, */
(8 - 1),
0b01111111, 0b11111111, 0b11111111, 0b11111111,
0b01111111, 0b11111111, 0b11111111, 0b11111111,
-1 * (8 - 1), 0b00000000, /*
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000, */
(29 - 1),
27, 'G', 'a', 'r', 'r', 'e', 't', 't', '\'', 's', ' ',
'W', 'o', 'r', 'k', 's', 'h', 'o', 'p', ' ',
'R', 'O', 'M', ' ', 'D', 'i', 's', 'k', 0
};
#else
const char const RDiskIcon[285] = {
// Icon
0b00000000, 0b00000000, 0b00000000, 0b00000000,
0b00000000, 0b00000000, 0b00000000, 0b00000000,
@ -79,35 +162,38 @@ const char RDiskIcon[285] = {
'W', 'o', 'r', 'k', 's', 'h', 'o', 'p', ' ',
'R', 'O', 'M', ' ', 'D', 'i', 's', 'k', 0
};
#endif
static void RDiskDecodeSettings(RDiskStorage_t *c, char *enable, char* boot, char* mount, char* ram) {
char rKey, aKey, legacy_startup, legacy_ram;
// Read PRAM and keys
RDiskReadXPRAM(1, 4, &legacy_startup);
RDiskReadXPRAM(1, 5, &legacy_ram);
rKey = RDiskIsRPressed();
aKey = RDiskIsAPressed();
static void RDiskDecodeSettings(RDiskStorage_t *c, Ptr unmount, Ptr mount, Ptr ram) {
// Decode settings
if (c->postBoot) {
*enable = 1;
*boot = 1; // Boot set so first access works
*unmount = 0;
*mount = 1;
*ram = 0;
} else if (rKey) { // R boots from ROM disk
*enable = 1;
*boot = 1;
} else if (RDiskIsRPressed()) { // R boots from ROM disk
*unmount = 0;
*mount = 0;
*ram = aKey; // A enables RAM disk
} else if (legacy_startup) {
*enable = 1;
*boot = (legacy_startup & 0xFD) && (legacy_startup != 0xFD);
*mount = !*boot && legacy_startup & 0x02;
*ram = legacy_ram;
*ram = RDiskIsAPressed(); // A enables RAM disk
} else {
*enable = 0;
*boot = 0;
*mount = 0;
*ram = 0;
// Read PRAM
char legacy_startup, legacy_ram;
RDiskReadXPRAM(1, 4, &legacy_startup);
RDiskReadXPRAM(1, 5, &legacy_ram);
if (legacy_startup == 1) {
*unmount = 0;
*mount = 0;
*ram = legacy_ram;
} else if (legacy_startup == 2 || legacy_startup == 3 ||
legacy_startup == 4 || legacy_startup == 5 ||
legacy_startup == 6 || legacy_startup == 7) {
*unmount = 1;
*mount = 1;
*ram = legacy_ram & 1;
} else {
*unmount = 1;
*mount = 0;
*ram = 0;
}
}
}
@ -119,91 +205,72 @@ void RDiskCopy24(Ptr sourcePtr, Ptr destPtr, unsigned long byteCount) {
SwapMMUMode(&mode);
}
// Figure out the first available drive number >= 5
static int RDiskFindDrvNum() {
DrvQElPtr dq;
int drvNum = 5;
for (dq = (DrvQElPtr)(GetDrvQHdr())->qHead; dq; dq = (DrvQElPtr)dq->qLink) {
if (dq->dQDrive >= drvNum) { drvNum = dq->dQDrive + 1; }
}
return drvNum;
}
#pragma parameter __D0 RDiskOpen(__A0, __A1)
OSErr RDiskOpen(IOParamPtr p, DCtlPtr d) {
DrvQElPtr dq;
int drvNum;
Ptr copy24;
RDiskStorage_t *c;
char legacy_startup, legacy_ram;
// Do nothing if already opened
if (d->dCtlStorage) { return noErr; }
// Figure out first available drive number
drvNum = 1;
for (dq = (DrvQElPtr)(GetDrvQHdr())->qHead; dq; dq = (DrvQElPtr)dq->qLink) {
if (dq->dQDrive >= drvNum) { drvNum = dq->dQDrive + 1; }
}
// Allocate storage struct
d->dCtlStorage = NewHandleSysClear(sizeof(RDiskStorage_t));
if (!d->dCtlStorage) { return openErr; }
// Allocate copy function buffer and copy RDiskCopy24 to it
copy24 = NewPtrSys(64);
if (!copy24) { DisposeHandle(d->dCtlStorage); return openErr; }
BlockMove(&RDiskCopy24, copy24, 64);
// Lock our storage struct and get master pointer
HLock(d->dCtlStorage);
c = *(RDiskStorage_t**)d->dCtlStorage;
// Initialize storage struct fields
//c->initialized = 0;
//c->removed = 0;
//c->postBoot = 0;
//c->ramdisk = NULL;
c->copy24 = (RDiskCopy_t)copy24;
// Find first available drive number
drvNum = RDiskFindDrvNum();
// Set drive status
c->status.writeProt = -1;
c->status.diskInPlace = 8; // 8 means nonejectable disk
c->status.track = 0;
c->status.writeProt = -1; // nonzero is write protected
c->status.diskInPlace = 8; // 8 is nonejectable disk
c->status.installed = 1; // drive installed
c->status.sides = 0; // drive installed
c->status.qType = 1;
c->status.dQDrive = drvNum;
c->status.dQFSID = 0;
c->status.dQRefNum = d->dCtlRefNum;
c->status.driveSize = RDiskSize / 512;
c->status.driveS1 = (RDiskSize / 512) >> 16;
// Set driver flags
/*d->dCtlFlags |= dReadEnableMask | dWritEnableMask |
dCtlEnableMask | dStatEnableMask |
dNeedLockMask;*/ // 0x4F
#ifdef RDISK_COMPRESS_ICON
// Decompress icon
char *src = &RDiskIconCompressed[0];
char *dst = &c->icon[0];
UnpackBits(&src, &dst, 285);
#endif
// Add drive to drive queue and return
RDiskAddDrive(c->status.dQRefNum, drvNum, (DrvQElPtr)&c->status.qLink);
return noErr;
}
static OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
char rdiskEN, mountEN, bootEN, ramEN;
static void RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
char unmountEN, mountEN, ramEN;
// Mark init done
c->initialized = 1;
// Decode settings
RDiskDecodeSettings(c, &rdiskEN, &bootEN, &mountEN, &ramEN);
RDiskDecodeSettings(c, &unmountEN, &mountEN, &ramEN);
// If ROM disk not enabled, remove drive from drive queue
if (!rdiskEN) {
QHdrPtr head = GetDrvQHdr();
DrvQElPtr dq = (DrvQElPtr)head->qHead;
// Remove our drive from the system drive queue
// Loop through entire drive queue, searching for our deive
while ((dq != (DrvQElPtr)(head->qTail)) &&
(dq->dQRefNum != d->dCtlRefNum)) {
dq = (DrvQElPtr)(dq->qLink);
}
// If we found our drive, remove it from the queue
if (dq->dQRefNum == d->dCtlRefNum) {
Dequeue((QElemPtr)dq, head);
}
// Mark drive removed and offline
c->removed = 1;
c->status.diskInPlace = 0; // 0 means no disk in drive
return offLinErr;
}
// If RAM disk enabled, try to allocate RAM disk buffer
if (ramEN) {
// If RAM disk enabled, try to allocate RAM disk buffer if not already
if (ramEN & !c->ramdisk) {
if (*MMU32bit) { // 32-bit mode
unsigned long minBufPtr, newBufPtr;
// Compute if there is enough high memory
@ -220,11 +287,12 @@ static OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
c->status.writeProt = 0;
}
} else { // 24-bit mode
// Get address of copy24 routine
RDiskCopy_t copy24 = (RDiskCopy_t)RDiskCopy24;
// Put RAM disk just past 8MB
c->ramdisk = (char*)(8 * 1024 * 1024);
c->ramdisk = (Ptr)(8 * 1024 * 1024);
// Copy ROM disk image to RAM disk
((RDiskCopy_t)StripAddress(c->copy24))(
RDiskBuf, StripAddress(c->ramdisk), RDiskSize);
copy24(RDiskBuf, c->ramdisk, RDiskSize);
// Clearing write protect marks RAM disk enabled
c->status.writeProt = 0;
//FIXME: what if we don't have enough RAM?
@ -234,133 +302,125 @@ static OSErr RDiskInit(IOParamPtr p, DCtlPtr d, RDiskStorage_t *c) {
}
}
// If boot disabled...
if (!bootEN) {
// Set drive offline
c->status.diskInPlace = 0; // 0 means no disk in drive
// Enable accRun to post disk inserted event if mount enabled
if (mountEN) {
d->dCtlDelay = 150;
d->dCtlFlags |= dNeedTimeMask;
}
return offLinErr;
// Unmount if not booting from ROM disk
if (unmountEN) {
c->status.diskInPlace = 0; // 0 == no disk in drive
}
return noErr;
// If mount enabled, enable accRun to post disk inserted event later
if (mountEN) {
d->dCtlFlags |= dNeedTimeMask; // Enable accRun
d->dCtlDelay = 150; // Set accRun delay (150 ticks is 2.5 sec.)
}
}
#pragma parameter __D0 RDiskPrime(__A0, __A1)
OSErr RDiskPrime(IOParamPtr p, DCtlPtr d) {
RDiskStorage_t *c;
char cmd;
char *disk;
long offset;
Ptr disk;
// Return disk offline error if dCtlStorage null
if (!d->dCtlStorage) { return offLinErr; }
if (!d->dCtlStorage) { return notOpenErr; }
// Dereference dCtlStorage to get pointer to our context
c = *(RDiskStorage_t**)d->dCtlStorage;
// Initialize if this is the first prime call
if (!c->initialized) { RDiskInit(p, d, c); }
// Return disk offline error if virtual disk not inserted
if (!c->status.diskInPlace) { return offLinErr; }
// Initialize if this is the first prime call
if (!c->initialized) {
OSErr ret = RDiskInit(p, d, c);
if (ret != noErr) { return ret; }
}
// Get pointer to RAM or ROM disk buffer
disk = c->ramdisk ? c->ramdisk : RDiskBuf;
// Add offset to buffer pointer according to positioning mode
switch (p->ioPosMode & 0x000F) {
case fsAtMark: offset = d->dCtlPosition; break;
case fsFromStart: offset = p->ioPosOffset; break;
case fsFromMark: offset = d->dCtlPosition + p->ioPosOffset; break;
default: break;
}
disk += offset;
// Bounds checking disabled
if (offset >= RDiskSize || p->ioReqCount >= RDiskSize ||
offset + p->ioReqCount >= RDiskSize) { return posErr; }
disk = (c->ramdisk ? c->ramdisk : RDiskBuf) + d->dCtlPosition;
// Bounds checking
if (d->dCtlPosition >= RDiskSize || p->ioReqCount >= RDiskSize ||
d->dCtlPosition + p->ioReqCount >= RDiskSize) { return paramErr; }
// Service read or write request
cmd = p->ioTrap & 0x00FF;
if (cmd == aRdCmd) { // Read
// Return immediately if verify operation requested
//FIXME: follow either old (verify) or new (read uncached) convention
if (p->ioPosMode & rdVerifyMask) {
return noErr;
}
// Read from disk into buffer.
if (*MMU32bit) { BlockMove(disk, p->ioBuffer, p->ioReqCount); }
else {
((RDiskCopy_t)StripAddress(c->copy24))(
disk, StripAddress(p->ioBuffer), p->ioReqCount);
// Get address of copy24 routine and then copy
RDiskCopy_t copy24 = (RDiskCopy_t)RDiskCopy24;
copy24(disk, StripAddress(p->ioBuffer), p->ioReqCount);
}
// Update count
p->ioActCount = p->ioReqCount;
d->dCtlPosition = offset + p->ioReqCount;
p->ioPosOffset = d->dCtlPosition;
return noErr;
} else if (cmd == aWrCmd) { // Write
// Fail if write protected or RAM disk buffer not set up
if (c->status.writeProt || !c->ramdisk) { return wPrErr; }
// Write from buffer into disk.
if (*MMU32bit) { BlockMove(p->ioBuffer, disk, p->ioReqCount); }
else {
((RDiskCopy_t)StripAddress(c->copy24))(
StripAddress(p->ioBuffer), disk, p->ioReqCount);
// Get address of copy24 routine and then copy
RDiskCopy_t copy24 = (RDiskCopy_t)RDiskCopy24;
copy24(StripAddress(p->ioBuffer), disk, p->ioReqCount);
}
// Update count and position/offset
p->ioActCount = p->ioReqCount;
d->dCtlPosition = offset + p->ioReqCount;
p->ioPosOffset = d->dCtlPosition;
return noErr;
} else { return noErr; }
//FIXME: Should we fail if cmd isn't read or write?
} else { return noErr; } //FIXME: Fail if cmd isn't read or write?
// Update count and position/offset, then return
d->dCtlPosition += p->ioReqCount;
p->ioActCount = p->ioReqCount;
return noErr;
}
#pragma parameter __D0 RDiskControl(__A0, __A1)
OSErr RDiskControl(CntrlParamPtr p, DCtlPtr d) {
RDiskStorage_t *c;
// Fail if dCtlStorage null
if (!d->dCtlStorage) { return controlErr; }
if (!d->dCtlStorage) { return notOpenErr; }
// Dereference dCtlStorage to get pointer to our context
c = *(RDiskStorage_t**)d->dCtlStorage;
// Handle control request based on csCode
switch (p->csCode) {
case 6: // Format
if (!c->status.diskInPlace || c->status.writeProt || !c->ramdisk) {
case kFormat:
if (!c->status.diskInPlace || c->status.writeProt || !c->ramdisk) {
return controlErr;
} else {
char zero[64];
for (int i = 0; i < sizeof(zero); i++) { zero[i] = 0; }
for (int i = 0; i < RDiskSize / 64; i++) {
if (*MMU32bit) { BlockMove(zero, c->ramdisk, sizeof(zero)); }
else {
((RDiskCopy_t)StripAddress(c->copy24))(
StripAddress(zero), c->ramdisk, sizeof(zero));
}
}
long zero[16];
zero[0] = 0;
for (int i = 0; i < 256; i++) {
if (*MMU32bit) { BlockMove(zero, c->ramdisk, sizeof(zero)); }
else {
// Get address of copy24 routine and then copy
RDiskCopy_t copy24 = (RDiskCopy_t)RDiskCopy24;
copy24((Ptr)zero, c->ramdisk, sizeof(zero));
}
}
return noErr;
case 5: // Verify (after format)
if (!c->status.diskInPlace || c->status.writeProt || !c->ramdisk) {
return controlErr;
} else { return noErr; }
case kVerify:
if (!c->status.diskInPlace) { return controlErr; }
return noErr;
case killCode:
return noErr;
case kEject:
// "Reinsert" disk if ejected illegally
if (c->installed) { PostEvent(diskEvt, c->status.dQDrive); }
return controlErr; // Eject not allowed so return error
case accRun:
// Disable accRun
d->dCtlFlags &= ~dNeedTimeMask;
// If drive present in drive queue, set drive online
if (!c->removed) {
c->status.diskInPlace = 8; // 8 means nonejectable disk
PostEvent(diskEvt, c->status.dQDrive);
}
d->dCtlFlags &= ~dNeedTimeMask; // Disable accRun
c->status.diskInPlace = 8; // 8 is nonejectable disk
PostEvent(diskEvt, c->status.dQDrive); // Post disk inserted event
return noErr;
case 21: case 22: // Get icon
*(Ptr*)&p->csParam = (Ptr)&RDiskIcon;
case kDriveIcon: case kMediaIcon: // Get icon
#ifdef RDISK_COMPRESS_ICON
*(Ptr*)p->csParam = (Ptr)c->icon;
#else
*(Ptr*)p->csParam = (Ptr)RDiskIcon;
#endif
return noErr;
case 128:
case kDriveInfo:
// high word (bytes 2 & 3) clear
// byte 1 = primary + fixed media + internal
// byte 0 = drive type (0x10 is RAM disk) / (0x11 is ROM disk)
if (c->status.writeProt) { *(long*)p->csParam = 0x00000410; }
else { *(long*)p->csParam = 0x00000411; }
return noErr;
case 24: // Return SCSI partition size
*(long*)p->csParam = RDiskSize / 512;
return noErr;
case 2351: // Enable post-boot mode
c->postBoot = 1;
return noErr;
default: return controlErr;
@ -371,17 +431,14 @@ OSErr RDiskControl(CntrlParamPtr p, DCtlPtr d) {
OSErr RDiskStatus(CntrlParamPtr p, DCtlPtr d) {
RDiskStorage_t *c;
// Fail if dCtlStorage null
if (!d->dCtlStorage) { return statusErr; }
if (!d->dCtlStorage) { return notOpenErr; }
// Dereference dCtlStorage to get pointer to our context
c = *(RDiskStorage_t**)d->dCtlStorage;
// Handle status request based on csCode
switch (p->csCode) {
case drvStsCode:
case kDriveStatus:
BlockMove(*d->dCtlStorage, &p->csParam, sizeof(DrvSts2));
return noErr;
case 128: // Get size
*((long*)p->csParam) = RDiskSize;
return noErr;
default: return statusErr;
}
}
@ -391,7 +448,6 @@ OSErr RDiskClose(IOParamPtr p, DCtlPtr d) {
// If dCtlStorage not null, dispose of it and its contents
if (!d->dCtlStorage) { return noErr; }
RDiskStorage_t *c = *(RDiskStorage_t**)d->dCtlStorage;
if (c->copy24) { DisposePtr((Ptr)c->copy24); }
HUnlock(d->dCtlStorage);
DisposeHandle(d->dCtlStorage);
d->dCtlStorage = NULL;

26
rdisk.h
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@ -35,31 +35,19 @@ void RDiskBreak() = { 0xA9FF };
typedef void (*RDiskCopy_t)(Ptr, Ptr, unsigned long);
//#define RDISK_COMPRESS_ICON
typedef struct RDiskStorage_s {
DrvSts2 status;
char initialized;
char removed;
char postBoot;
char *ramdisk;
RDiskCopy_t copy24;
} RDiskStorage_t;
/*
typedef void (*RDiskCopy_t)(Ptr, Ptr, unsigned long);
typedef void (*RDiskFormat_t)(Ptr);
typedef struct RDiskStorage_s {
DrvSts2 status;
char initialized;
char removed;
char installed;
char postBoot;
Ptr ramdisk;
char copy24[64] __attribute__ ((aligned (4))) ;
char format24[64] __attribute__ ((aligned (4))) ;
#ifdef RDISK_COMPRESS_ICON
char icon[285];
#endif
} RDiskStorage_t;
*/
#define PackBits_Repeat(count) ((-1) * (count - 1))
#define PackBits_Literal(count) (count - 1)
#endif