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/* |
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* macos_util.cpp - MacOS definitions/utility functions |
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* |
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* Basilisk II (C) 1997-2001 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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#include "sysdeps.h" |
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#include "cpu_emulation.h" |
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#include "adb.h" |
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#include "main.h" |
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#include "sony.h" |
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#include "disk.h" |
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#include "cdrom.h" |
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#include "macos_util.h" |
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|
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#define DEBUG 0 |
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#include "debug.h" |
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|
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|
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/* |
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* Enqueue QElem to list |
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*/ |
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|
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void EnqueueMac(uint32 elem, uint32 list) |
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{ |
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WriteMacInt32(elem + qLink, 0); |
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if (!ReadMacInt32(list + qTail)) { |
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WriteMacInt32(list + qHead, elem); |
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WriteMacInt32(list + qTail, elem); |
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} else { |
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WriteMacInt32(ReadMacInt32(list + qTail) + qLink, elem); |
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WriteMacInt32(list + qTail, elem); |
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} |
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} |
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|
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|
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/* |
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* Find first free drive number, starting at num |
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*/ |
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|
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static bool is_drive_number_free(int num) |
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{ |
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uint32 e = ReadMacInt32(0x308 + qHead); |
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while (e) { |
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uint32 d = e - dsQLink; |
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if ((int)ReadMacInt16(d + dsQDrive) == num) |
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return false; |
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e = ReadMacInt32(e + qLink); |
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} |
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return true; |
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} |
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|
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int FindFreeDriveNumber(int num) |
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{ |
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while (!is_drive_number_free(num)) |
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num++; |
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return num; |
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} |
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|
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|
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/* |
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* Mount volume with given file handle (call this function when you are unable to |
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* do automatic media change detection and the user has to press a special key |
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* or something to mount a volume; this function will check if there's really a |
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* volume in the drive with SysIsDiskInserted(); volumes which are present on startup |
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* are automatically mounted) |
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*/ |
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|
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void MountVolume(void *fh) |
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{ |
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SonyMountVolume(fh) || DiskMountVolume(fh) || CDROMMountVolume(fh); |
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} |
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|
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|
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/* |
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* Calculate disk image file layout given file size and first 256 data bytes |
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*/ |
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|
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void FileDiskLayout(loff_t size, uint8 *data, loff_t &start_byte, loff_t &real_size) |
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{ |
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if (size == 419284 || size == 838484) { |
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// 400K/800K DiskCopy image, 84 byte header |
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start_byte = 84; |
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real_size = (size - 84) & ~0x1ff; |
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} else { |
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// 0..511 byte header |
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start_byte = size & 0x1ff; |
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real_size = size - start_byte; |
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} |
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} |
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|
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|
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uint32 DebugUtil(uint32 Selector) |
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{ |
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switch (Selector) { |
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case duDebuggerGetMax: |
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return 3; |
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case duDebuggerEnter: |
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return 0; |
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case duDebuggerExit: |
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return 0; |
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case duDebuggerPoll: |
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ADBInterrupt(); |
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return 0; |
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default: |
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return (uint32) paramErr; |
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} |
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} |
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|
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|
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/* |
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* Convert time_t value to MacOS time (seconds since 1.1.1904) |
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*/ |
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|
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uint32 TimeToMacTime(time_t t) |
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{ |
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// This code is taken from glibc 2.2 |
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|
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// Convert to number of seconds elapsed since 1-Jan-1904 |
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struct tm *local = localtime(&t); |
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const int TM_EPOCH_YEAR = 1900; |
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const int MAC_EPOCH_YEAR = 1904; |
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int a4 = ((local->tm_year + TM_EPOCH_YEAR) >> 2) - !(local->tm_year & 3); |
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int b4 = (MAC_EPOCH_YEAR >> 2) - !(MAC_EPOCH_YEAR & 3); |
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int a100 = a4 / 25 - (a4 % 25 < 0); |
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int b100 = b4 / 25 - (b4 % 25 < 0); |
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int a400 = a100 >> 2; |
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int b400 = b100 >> 2; |
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int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); |
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uint32 days = local->tm_yday + 365 * (local->tm_year - 4) + intervening_leap_days; |
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return local->tm_sec + 60 * (local->tm_min + 60 * (local->tm_hour + 24 * days)); |
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} |
