diff options
Diffstat (limited to 'qemu/roms/openbios/fs/hfs/file.c')
| -rw-r--r-- | qemu/roms/openbios/fs/hfs/file.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/qemu/roms/openbios/fs/hfs/file.c b/qemu/roms/openbios/fs/hfs/file.c new file mode 100644 index 000000000..a6ddb893a --- /dev/null +++ b/qemu/roms/openbios/fs/hfs/file.c @@ -0,0 +1,191 @@ +/* + * libhfs - library for reading and writing Macintosh HFS volumes + * Copyright (C) 1996-1998 Robert Leslie + * + * 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., 51 Franklin Street - Fifth Floor, Boston, + * MA 02110-1301, USA. + * + * $Id: file.c,v 1.9 1998/11/02 22:08:59 rob Exp $ + */ + +#include "config.h" +#include "libhfs.h" +#include "file.h" +#include "btree.h" +#include "record.h" +#include "volume.h" + +/* + * NAME: file->init() + * DESCRIPTION: initialize file structure + */ +void f_init(hfsfile *file, hfsvol *vol, long cnid, const char *name) +{ + int i; + + file->vol = vol; + file->parid = 0; + + strcpy(file->name, name); + + file->cat.cdrType = cdrFilRec; + file->cat.cdrResrv2 = 0; + + file->cat.u.fil.filFlags = 0; + file->cat.u.fil.filTyp = 0; + + file->cat.u.fil.filUsrWds.fdType = 0; + file->cat.u.fil.filUsrWds.fdCreator = 0; + file->cat.u.fil.filUsrWds.fdFlags = 0; + file->cat.u.fil.filUsrWds.fdLocation.v = 0; + file->cat.u.fil.filUsrWds.fdLocation.h = 0; + file->cat.u.fil.filUsrWds.fdFldr = 0; + + file->cat.u.fil.filFlNum = cnid; + file->cat.u.fil.filStBlk = 0; + file->cat.u.fil.filLgLen = 0; + file->cat.u.fil.filPyLen = 0; + file->cat.u.fil.filRStBlk = 0; + file->cat.u.fil.filRLgLen = 0; + file->cat.u.fil.filRPyLen = 0; + file->cat.u.fil.filCrDat = 0; + file->cat.u.fil.filMdDat = 0; + file->cat.u.fil.filBkDat = 0; + + file->cat.u.fil.filFndrInfo.fdIconID = 0; + for (i = 0; i < 4; ++i) + file->cat.u.fil.filFndrInfo.fdUnused[i] = 0; + file->cat.u.fil.filFndrInfo.fdComment = 0; + file->cat.u.fil.filFndrInfo.fdPutAway = 0; + + file->cat.u.fil.filClpSize = 0; + + for (i = 0; i < 3; ++i) + { + file->cat.u.fil.filExtRec[i].xdrStABN = 0; + file->cat.u.fil.filExtRec[i].xdrNumABlks = 0; + + file->cat.u.fil.filRExtRec[i].xdrStABN = 0; + file->cat.u.fil.filRExtRec[i].xdrNumABlks = 0; + } + + file->cat.u.fil.filResrv = 0; + + f_selectfork(file, fkData); + + file->flags = 0; + + file->prev = NULL; + file->next = NULL; +} + +/* + * NAME: file->selectfork() + * DESCRIPTION: choose a fork for file operations + */ +void f_selectfork(hfsfile *file, int fork) +{ + file->fork = fork; + + memcpy(&file->ext, fork == fkData ? + &file->cat.u.fil.filExtRec : &file->cat.u.fil.filRExtRec, + sizeof(ExtDataRec)); + + file->fabn = 0; + file->pos = 0; +} + +/* + * NAME: file->getptrs() + * DESCRIPTION: make pointers to the current fork's lengths and extents + */ +void f_getptrs(hfsfile *file, ExtDataRec **extrec, + unsigned long **lglen, unsigned long **pylen) +{ + if (file->fork == fkData) + { + if (extrec) + *extrec = &file->cat.u.fil.filExtRec; + if (lglen) + *lglen = &file->cat.u.fil.filLgLen; + if (pylen) + *pylen = &file->cat.u.fil.filPyLen; + } + else + { + if (extrec) + *extrec = &file->cat.u.fil.filRExtRec; + if (lglen) + *lglen = &file->cat.u.fil.filRLgLen; + if (pylen) + *pylen = &file->cat.u.fil.filRPyLen; + } +} + +/* + * NAME: file->doblock() + * DESCRIPTION: read or write a numbered block from a file + */ +int f_doblock(hfsfile *file, unsigned long num, block *bp, + int (*func)(hfsvol *, unsigned int, unsigned int, block *)) +{ + unsigned int abnum; + unsigned int blnum; + unsigned int fabn; + int i; + + abnum = num / file->vol->lpa; + blnum = num % file->vol->lpa; + + /* locate the appropriate extent record */ + + fabn = file->fabn; + + if (abnum < fabn) + { + ExtDataRec *extrec; + + f_getptrs(file, &extrec, NULL, NULL); + + fabn = file->fabn = 0; + memcpy(&file->ext, extrec, sizeof(ExtDataRec)); + } + else + abnum -= fabn; + + while (1) + { + unsigned int n; + + for (i = 0; i < 3; ++i) + { + n = file->ext[i].xdrNumABlks; + + if (abnum < n) + return func(file->vol, file->ext[i].xdrStABN + abnum, blnum, bp); + + fabn += n; + abnum -= n; + } + + if (v_extsearch(file, fabn, &file->ext, NULL) <= 0) + goto fail; + + file->fabn = fabn; + } + +fail: + return -1; +} |