1 files changed, 136 insertions, 0 deletions
diff --git a/contrib/libcdio/xa.c b/contrib/libcdio/xa.c
new file mode 100644
index 000000000..f811f7ebd
--- /dev/null
+++ b/contrib/libcdio/xa.c
@@ -0,0 +1,136 @@
+/*
+    $Id: xa.c,v 1.3 2005/01/01 02:43:57 rockyb Exp $
+
+    Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
+    Copyright (C) 2003 Rocky Bernstein <rocky@panix.com>
+
+    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+/* Public headers */
+#include <cdio/iso9660.h>
+#include <cdio/util.h>
+#include <cdio/bytesex.h>
+
+/* Private headers */
+#include "cdio_assert.h"
+
+#define BUF_COUNT 16
+#define BUF_SIZE 80
+
+/* Return a pointer to a internal free buffer */
+static char *
+_getbuf (void)
+{
+  static char _buf[BUF_COUNT][BUF_SIZE];
+  static int _num = -1;
+  
+  _num++;
+  _num %= BUF_COUNT;
+
+  memset (_buf[_num], 0, BUF_SIZE);
+
+  return _buf[_num];
+}
+
+/*!
+  Returns a string which interpreting the extended attribute xa_attr. 
+  For example:
+  \verbatim
+  d---1xrxrxr
+  ---2--r-r-r
+  -a--1xrxrxr
+  \endverbatim
+
+  A description of the characters in the string follows
+  The 1st character is either "d" if the entry is a directory, or "-" if not.
+  The 2nd character is either "a" if the entry is CDDA (audio), or "-" if not.
+  The 3rd character is either "i" if the entry is interleaved, or "-" if not.
+  The 4th character is either "2" if the entry is mode2 form2 or "-" if not.
+  The 5th character is either "1" if the entry is mode2 form1 or "-" if not.
+   Note that an entry will either be in mode2 form1 or mode form2. That
+   is you will either see "2-" or "-1" in the 4th & 5th positions.
+
+  The 6th and 7th characters refer to permissions for a user while the
+  the 8th and 9th characters refer to permissions for a group while, and 
+  the 10th and 11th characters refer to permissions for a others. 
+ 
+  In each of these pairs the first character (6, 8, 10) is "x" if the 
+  entry is executable. For a directory this means the directory is
+  allowed to be listed or "searched".
+  The second character of a pair (7, 9, 11) is "r" if the entry is allowed
+  to be read. 
+*/
+
+const char *
+iso9660_get_xa_attr_str (uint16_t xa_attr)
+{
+  char *result = _getbuf();
+
+  xa_attr = uint16_from_be (xa_attr);
+
+  result[ 0] = (xa_attr & XA_ATTR_DIRECTORY) ? 'd' : '-';
+  result[ 1] = (xa_attr & XA_ATTR_CDDA) ? 'a' : '-';
+  result[ 2] = (xa_attr & XA_ATTR_INTERLEAVED) ? 'i' : '-';
+  result[ 3] = (xa_attr & XA_ATTR_MODE2FORM2) ? '2' : '-';
+  result[ 4] = (xa_attr & XA_ATTR_MODE2FORM1) ? '1' : '-';
+
+  result[ 5] = (xa_attr & XA_PERM_XUSR) ? 'x' : '-';
+  result[ 6] = (xa_attr & XA_PERM_RUSR) ? 'r' : '-';
+
+  result[ 7] = (xa_attr & XA_PERM_XGRP) ? 'x' : '-';
+  result[ 8] = (xa_attr & XA_PERM_RGRP) ? 'r' : '-';
+
+  /* Hack alert: wonder if this should be ROTH and XOTH? */
+  result[ 9] = (xa_attr & XA_PERM_XSYS) ? 'x' : '-';
+  result[10] = (xa_attr & XA_PERM_RSYS) ? 'r' : '-';
+
+  result[11] = '\0';
+
+  return result;
+}
+
+iso9660_xa_t *
+iso9660_xa_init (iso9660_xa_t *_xa, uint16_t uid, uint16_t gid, uint16_t attr, 
+	      uint8_t filenum)
+{
+  cdio_assert (_xa != NULL);
+  
+  _xa->user_id = uint16_to_be (uid);
+  _xa->group_id = uint16_to_be (gid);
+  _xa->attributes = uint16_to_be (attr);
+
+  _xa->signature[0] = 'X';
+  _xa->signature[1] = 'A';
+
+  _xa->filenum = filenum;
+
+  _xa->reserved[0] 
+    = _xa->reserved[1] 
+    = _xa->reserved[2] 
+    = _xa->reserved[3] 
+    = _xa->reserved[4] = 0x00;
+
+  return _xa;
+}