/*
 *  Copyright (C) 2006  James Antill
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  email: james@and.org
 */
/* these functions are higher level abstractions for getting the list of
 * xattrs from a file/fd */

#include "xattr_file2mem.h"
#include "xattr_sc.h"
#include <string.h>

static Xattrs *xattr__filefd2mem(const char *fname, int fd, unsigned int flags)
{
  Xattrs *xattrs   = NULL;
  char   *list_mem = NULL;
  ssize_t list_sz  = -1;
  const char *attr = NULL;
  
  if (!(xattrs = xattr_make()))
    return (NULL);
  
  if (!(list_mem = xattr_sc_listxattrs(fname, fd, flags, &list_sz)))
  {
    if (list_sz == -1)
      goto fail;
    
    return (xattrs);
  }

  attr = list_mem;
  while (list_sz > 0)
  {
    size_t len = strlen(attr);
    ssize_t val_sz = 0;
    char   *val_mem = NULL;
    
    if (!(val_mem = xattr_sc_getxattrs(fname, fd, attr, flags, &val_sz)))
    {
      if (!val_sz)
        goto next_attr;
      goto fail;
    }

    xattr_add(xattrs, attr, val_mem, val_sz);

    XATTR_SC_RET_FREE(val);
    
   next_attr:
    attr    += len + 1;
    list_sz -= len + 1;
  }

  XATTR_SC_RET_FREE(list_mem);
  
  return (xattrs);
  
 fail:
  XATTR_SC_RET_FREE(list_mem);
  xattr_free(xattrs);
  return (NULL);
}

Xattrs *xattr_file2mem(const char *fname, unsigned int flags)
{
  return (xattr__filefd2mem(fname, -1, flags));
}

Xattrs *xattr_fd2mem(int fd)
{
  return (xattr__filefd2mem(NULL, fd, 0));
}