Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / openbios / fs / ioglue.c

diff --git a/qemu/roms/openbios/fs/ioglue.c b/qemu/roms/openbios/fs/ioglue.c
new file mode 100644 (file)
index 0000000..1d33d8f
--- /dev/null
+++ b/qemu/roms/openbios/fs/ioglue.c
@@ -0,0 +1,92 @@
+/*
+ *   Creation Date: <2001/05/06 22:27:09 samuel>
+ *   Time-stamp: <2003/12/12 02:24:56 samuel>
+ *
+ *     <fs.c>
+ *
+ *             I/O API used by the filesystem code
+ *
+ *   Copyright (C) 2001, 2002, 2003 Samuel Rydh (samuel@ibrium.se)
+ *
+ *   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
+ *
+ */
+
+#include "config.h"
+#include "libopenbios/bindings.h"
+#include "fs/fs.h"
+#include "libc/diskio.h"
+#include "os.h"
+#include "hfs_mdb.h"
+
+/************************************************************************/
+/*     functionsions used by the various filesystems                   */
+/************************************************************************/
+
+char *
+get_hfs_vol_name( int fd, char *buf, int size )
+{
+       char sect[512];
+       hfs_mdb_t *mdb = (hfs_mdb_t*)&sect;
+
+       seek_io( fd, 0x400 );
+       read_io( fd, sect, sizeof(sect) );
+       if( hfs_get_ushort(mdb->drSigWord) == HFS_SIGNATURE ) {
+               unsigned int n = mdb->drVN[0];
+               if( n >= size )
+                       n = size - 1;
+               memcpy( buf, &mdb->drVN[1], n );
+               buf[n] = 0;
+       } else if( hfs_get_ushort(mdb->drSigWord) == HFS_PLUS_SIGNATURE ) {
+               strncpy( buf, "Unembedded HFS+", size );
+       } else {
+               strncpy( buf, "Error", size );
+       }
+       return buf;
+}
+
+unsigned long
+os_read( int fd, void *buf, unsigned long len, int blksize_bits )
+{
+       /* printk("os_read %d\n", (int)len); */
+
+       int cnt = read_io( fd, buf, len << blksize_bits );
+       return (cnt > 0)? (cnt >> blksize_bits) : cnt;
+}
+
+unsigned long
+os_seek( int fd, unsigned long blknum, int blksize_bits )
+{
+       /* printk("os_seek %d\n", blknum ); */
+       long long offs = (long long)blknum << blksize_bits;
+
+       /* offset == -1 means seek to EOF */
+       if( (int)blknum == -1 )
+               offs = -1;
+
+       if( seek_io(fd, offs) ) {
+               /* printk("os_seek failure\n"); */
+               return (unsigned long)-1;
+       }
+
+       if( (int)blknum == -1 ) {
+               if( (offs=tell(fd)) < 0 )
+                       return -1;
+               blknum = offs >> blksize_bits;
+       }
+       return blknum;
+}
+
+void
+os_seek_offset( int fd, long long offset )
+{
+       seek_io(fd, offset);
+}
+
+int
+os_same( int fd1, int fd2 )
+{
+       return fd1 == fd2;
+}