Final tidy up.

lib/xa.c

@@ -1,5 +1,5 @@
 /*
-    $Id: xa.c,v 1.2 2003/08/31 08:42:11 rocky Exp $
+    $Id: xa.c,v 1.3 2003/08/31 09:11:25 rocky Exp $
 
     Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
     Copyright (C) 2003 Rocky Bernstein <rocky@panix.com>
@@ -24,6 +24,10 @@
 # include "config.h"
 #endif
 
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
 /* Public headers */
 #include <cdio/iso9660.h>
 #include <cdio/util.h>
@@ -32,6 +36,80 @@
 #include "cdio_assert.h"
 #include "bytesex.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 everyone 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 user. 
+ 
+  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_ATTR_O_EXEC) ? 'x' : '-';
+  result[6] = (xa_attr & XA_ATTR_O_READ) ? 'r' : '-';
+
+  result[7] = (xa_attr & XA_ATTR_G_EXEC) ? 'x' : '-';
+  result[8] = (xa_attr & XA_ATTR_G_READ) ? 'r' : '-';
+
+  result[9] = (xa_attr & XA_ATTR_U_EXEC) ? 'x' : '-';
+  result[10] = (xa_attr & XA_ATTR_U_READ) ? '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)