low.h revision 1.1
1/* 2 * hfsutils - tools for reading and writing Macintosh HFS volumes 3 * Copyright (C) 1996, 1997 Robert Leslie 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 */ 19 20typedef struct { 21 Integer sbSig; /* device signature (should be 0x4552) */ 22 Integer sbBlkSize; /* block size of the device (in bytes) */ 23 LongInt sbBlkCount; /* number of blocks on the device */ 24 Integer sbDevType; /* reserved */ 25 Integer sbDevId; /* reserved */ 26 LongInt sbData; /* reserved */ 27 Integer sbDrvrCount; /* number of driver descriptor entries */ 28 LongInt ddBlock; /* first driver's starting block */ 29 Integer ddSize; /* size of the driver, in 512-byte blocks */ 30 Integer ddType; /* driver operating system type (MacOS = 1) */ 31 Integer ddPad[243]; /* additional drivers, if any */ 32} Block0; 33 34typedef struct { 35 Integer bbID; /* boot blocks signature */ 36 LongInt bbEntry; /* entry point to boot code */ 37 Integer bbVersion; /* boot blocks version number */ 38 Integer bbPageFlags; /* used internally */ 39 Str15 bbSysName; /* System filename */ 40 Str15 bbShellName; /* Finder filename */ 41 Str15 bbDbg1Name; /* debugger filename */ 42 Str15 bbDbg2Name; /* debugger filename */ 43 Str15 bbScreenName; /* name of startup screen */ 44 Str15 bbHelloName; /* name of startup program */ 45 Str15 bbScrapName; /* name of system scrap file */ 46 Integer bbCntFCBs; /* number of FCBs to allocate */ 47 Integer bbCntEvts; /* number of event queue elements */ 48 LongInt bb128KSHeap; /* system heap size on 128K Mac */ 49 LongInt bb256KSHeap; /* used internally */ 50 LongInt bbSysHeapSize; /* system heap size on all machines */ 51 Integer filler; /* reserved */ 52 LongInt bbSysHeapExtra; /* additional system heap space */ 53 LongInt bbSysHeapFract; /* fraction of RAM for system heap */ 54} BootBlkHdr; 55 56typedef struct { 57 Integer pmSig; /* partition signature (0x504d or 0x5453) */ 58 Integer pmSigPad; /* reserved */ 59 LongInt pmMapBlkCnt; /* number of blocks in partition map */ 60 LongInt pmPyPartStart; /* first physical block of partition */ 61 LongInt pmPartBlkCnt; /* number of blocks in partition */ 62 Char pmPartName[33]; /* partition name */ 63 Char pmParType[33]; /* partition type */ 64 /* 65 * Apple_partition_map partition map 66 * Apple_Driver device driver 67 * Apple_Driver43 SCSI Manager 4.3 device driver 68 * Apple_MFS Macintosh 64K ROM filesystem 69 * Apple_HFS Macintosh hierarchical filesystem 70 * Apple_Unix_SVR2 Unix filesystem 71 * Apple_PRODOS ProDOS filesystem 72 * Apple_Free unused 73 * Apple_Scratch empty 74 */ 75 LongInt pmLgDataStart; /* first logical block of data area */ 76 LongInt pmDataCnt; /* number of blocks in data area */ 77 LongInt pmPartStatus; /* partition status information */ 78 LongInt pmLgBootStart; /* first logical block of boot code */ 79 LongInt pmBootSize; /* size of boot code, in bytes */ 80 LongInt pmBootAddr; /* boot code load address */ 81 LongInt pmBootAddr2; /* reserved */ 82 LongInt pmBootEntry; /* boot code entry point */ 83 LongInt pmBootEntry2; /* reserved */ 84 LongInt pmBootCksum; /* boot code checksum */ 85 Char pmProcessor[17];/* processor type */ 86 Integer pmPad[188]; /* reserved */ 87} Partition; 88 89int l_lockvol(hfsvol *); 90 91int l_readblock0(hfsvol *); 92int l_readpm(hfsvol *); 93 94int l_readmdb(hfsvol *); 95int l_writemdb(hfsvol *); 96 97int l_readvbm(hfsvol *); 98int l_writevbm(hfsvol *); 99