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- /*
- * macos_util.cpp - MacOS definitions/utility functions
- *
- * Basilisk II (C) 1997-2001 Christian Bauer
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
- #include "sysdeps.h"
- #include "cpu_emulation.h"
- #include "adb.h"
- #include "main.h"
- #include "sony.h"
- #include "disk.h"
- #include "cdrom.h"
- #include "macos_util.h"
-
- #define DEBUG 0
- #include "debug.h"
-
-
- /*
- * Enqueue QElem to list
- */
-
- void EnqueueMac(uint32 elem, uint32 list)
- {
- WriteMacInt32(elem + qLink, 0);
- if (!ReadMacInt32(list + qTail)) {
- WriteMacInt32(list + qHead, elem);
- WriteMacInt32(list + qTail, elem);
- } else {
- WriteMacInt32(ReadMacInt32(list + qTail) + qLink, elem);
- WriteMacInt32(list + qTail, elem);
- }
- }
-
-
- /*
- * Find first free drive number, starting at num
- */
-
- static bool is_drive_number_free(int num)
- {
- uint32 e = ReadMacInt32(0x308 + qHead);
- while (e) {
- uint32 d = e - dsQLink;
- if ((int)ReadMacInt16(d + dsQDrive) == num)
- return false;
- e = ReadMacInt32(e + qLink);
- }
- return true;
- }
-
- int FindFreeDriveNumber(int num)
- {
- while (!is_drive_number_free(num))
- num++;
- return num;
- }
-
-
- /*
- * Mount volume with given file handle (call this function when you are unable to
- * do automatic media change detection and the user has to press a special key
- * or something to mount a volume; this function will check if there's really a
- * volume in the drive with SysIsDiskInserted(); volumes which are present on startup
- * are automatically mounted)
- */
-
- void MountVolume(void *fh)
- {
- SonyMountVolume(fh) || DiskMountVolume(fh) || CDROMMountVolume(fh);
- }
-
-
- /*
- * Calculate disk image file layout given file size and first 256 data bytes
- */
-
- void FileDiskLayout(loff_t size, uint8 *data, loff_t &start_byte, loff_t &real_size)
- {
- if (size == 419284 || size == 838484) {
- // 400K/800K DiskCopy image, 84 byte header
- start_byte = 84;
- real_size = (size - 84) & ~0x1ff;
- } else {
- // 0..511 byte header
- start_byte = size & 0x1ff;
- real_size = size - start_byte;
- }
- }
-
-
- uint32 DebugUtil(uint32 Selector)
- {
- switch (Selector)
- {
- case duDebuggerGetMax:
- return 3;
- case duDebuggerEnter:
- return 0;
- case duDebuggerExit:
- return 0;
- case duDebuggerPoll:
- ADBInterrupt();
- return 0;
- default:
- return (uint32) paramErr;
- }
- }
-
-