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/* |
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* libhfs - library for reading and writing Macintosh HFS volumes |
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* Copyright (C) 1996-1998 Robert Leslie |
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* Modified for use with PearPC (c) 2004 Stefan Weyergraf |
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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., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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*/ |
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|
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# ifdef HAVE_CONFIG_H |
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# include "config.h" |
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# endif |
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|
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//# ifdef HAVE_FCNTL_H |
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# if 1 |
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# include <fcntl.h> |
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# else |
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int open(const char *, int, ...); |
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int fcntl(int, int, ...); |
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# endif |
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|
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//# ifdef HAVE_UNISTD_H |
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# if 1 |
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# include <unistd.h> |
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# else |
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int close(int); |
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off_t lseek(int, off_t, int); |
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ssize_t read(int, void *, size_t); |
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ssize_t write(int, const char *, size_t); |
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int stat(const char *, struct stat *); |
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int fstat(int, struct stat *); |
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# endif |
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|
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# include <errno.h> |
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# include <sys/stat.h> |
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|
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extern "C" { |
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# include "libhfs.h" |
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# include "os.h" |
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} |
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|
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#include "../hfsglue.h" |
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#include "tools/except.h" |
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|
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/* |
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* NAME: os->open() |
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* DESCRIPTION: open and lock a new descriptor from the given path and mode |
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*/ |
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#if 0 |
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int os_open(void **priv, const char *path, int mode) |
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{ |
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int fd; |
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struct flock lock; |
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|
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switch (mode) |
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{ |
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case HFS_MODE_RDONLY: |
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mode = O_RDONLY; |
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break; |
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|
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case HFS_MODE_RDWR: |
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default: |
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mode = O_RDWR; |
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break; |
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} |
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|
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fd = open(path, mode); |
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if (fd == -1) |
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ERROR(errno, "error opening medium"); |
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|
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/* lock descriptor against concurrent access */ |
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|
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lock.l_type = (mode == O_RDONLY) ? F_RDLCK : F_WRLCK; |
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lock.l_start = 0; |
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lock.l_whence = SEEK_SET; |
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lock.l_len = 0; |
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|
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if (fcntl(fd, F_SETLK, &lock) == -1 && |
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(errno == EACCES || errno == EAGAIN)) |
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ERROR(EAGAIN, "unable to obtain lock for medium"); |
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|
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*priv = (void *) fd; |
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|
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return 0; |
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|
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fail: |
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if (fd != -1) |
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close(fd); |
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|
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return -1; |
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} |
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#endif |
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|
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int hfs_os_open(void **priv, const void *devicehandle, int mode) |
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{ |
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hfs_devicehandle_s *dh = (hfs_devicehandle_s *)devicehandle; |
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*priv = dh; |
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return 0; |
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} |
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|
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/* |
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* NAME: os->close() |
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* DESCRIPTION: close an open descriptor |
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*/ |
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int hfs_os_close(void **priv) |
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{ |
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#if 0 |
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int fd = (int) *priv; |
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|
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*priv = (void *) -1; |
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|
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if (close(fd) == -1) |
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ERROR(errno, "error closing medium"); |
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|
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return 0; |
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|
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fail: |
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return -1; |
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#endif |
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return 0; |
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} |
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|
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/* |
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* NAME: os->same() |
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* DESCRIPTION: return 1 iff path is same as the open descriptor |
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*/ |
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#if 0 |
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int os_same(void **priv, const char *path) |
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{ |
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int fd = (int) *priv; |
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struct stat fdev, dev; |
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|
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if (fstat(fd, &fdev) == -1 || |
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stat(path, &dev) == -1) |
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ERROR(errno, "can't get path information"); |
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|
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return fdev.st_dev == dev.st_dev && |
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fdev.st_ino == dev.st_ino; |
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|
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fail: |
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return -1; |
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} |
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#endif |
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|
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int hfs_os_same(void **priv, const void *devicehandle) |
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{ |
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return 0; |
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} |
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|
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/* |
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* NAME: os->seek() |
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* DESCRIPTION: set a descriptor's seek pointer (offset in blocks) |
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*/ |
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#if 0 |
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unsigned long os_seek(void **priv, unsigned long offset) |
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{ |
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int fd = (int) *priv; |
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off_t result; |
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|
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/* offset == -1 special; seek to last block of device */ |
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|
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if (offset == (unsigned long) -1) |
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result = lseek(fd, 0, SEEK_END); |
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else |
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result = lseek(fd, offset << HFS_BLOCKSZ_BITS, SEEK_SET); |
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|
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if (result == -1) |
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ERROR(errno, "error seeking medium"); |
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|
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return (unsigned long) result >> HFS_BLOCKSZ_BITS; |
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|
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fail: |
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return -1; |
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} |
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#endif |
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|
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unsigned long hfs_os_seek(void **priv, unsigned long offset) |
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{ |
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hfs_devicehandle_s *dh = (hfs_devicehandle_s *)*priv; |
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try { |
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FileOfs s = dh->mStart + (offset << HFS_BLOCKSZ_BITS); |
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dh->mDevice->seek(s); |
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} catch (const IOException &x) { |
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return (unsigned long)-1; |
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} |
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/* FileOfs t = dh->mDevice->tell();*/ |
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long result = (dh->mDevice->tell()-dh->mStart) >> HFS_BLOCKSZ_BITS; |
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return result; |
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} |
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|
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/* |
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* NAME: os->read() |
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* DESCRIPTION: read blocks from an open descriptor |
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*/ |
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#if 0 |
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unsigned long os_read(void **priv, void *buf, unsigned long len) |
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{ |
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int fd = (int) *priv; |
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ssize_t result; |
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|
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result = read(fd, buf, len << HFS_BLOCKSZ_BITS); |
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|
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if (result == -1) |
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ERROR(errno, "error reading from medium"); |
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|
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return (unsigned long) result >> HFS_BLOCKSZ_BITS; |
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|
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fail: |
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return -1; |
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} |
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#endif |
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|
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unsigned long hfs_os_read(void **priv, void *buf, unsigned long len) |
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{ |
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hfs_devicehandle_s *dh = (hfs_devicehandle_s *)*priv; |
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return dh->mDevice->read(buf, len << HFS_BLOCKSZ_BITS) >> HFS_BLOCKSZ_BITS; |
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} |
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|
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/* |
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* NAME: os->write() |
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* DESCRIPTION: write blocks to an open descriptor |
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*/ |
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#if 0 |
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unsigned long os_write(void **priv, const void *buf, unsigned long len) |
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{ |
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int fd = (int) *priv; |
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ssize_t result; |
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|
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result = write(fd, buf, len << HFS_BLOCKSZ_BITS); |
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|
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if (result == -1) |
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ERROR(errno, "error writing to medium"); |
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|
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return (unsigned long) result >> HFS_BLOCKSZ_BITS; |
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|
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fail: |
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return -1; |
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} |
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#endif |
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|
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unsigned long hfs_os_write(void **priv, const void *buf, unsigned long len) |
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{ |
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hfs_devicehandle_s *dh = (hfs_devicehandle_s *)*priv; |
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return dh->mDevice->write(buf, len << HFS_BLOCKSZ_BITS) >> HFS_BLOCKSZ_BITS; |
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} |
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