/*
 * bdm-open.c -- 
 *
 * Copyright (c) 2006 CodeSourcery Inc
 *
 * The authors hereby grant permission to use, copy, modify, distribute,
 * and license this software and its documentation for any purpose, provided
 * that existing copyright notices are retained in all copies and that this
 * notice is included verbatim in any distributions. No written agreement,
 * license, or royalty fee is required for any of the authorized uses.
 * Modifications to this software may be copyrighted by their authors
 * and need not follow the licensing terms described here, provided that
 * the new terms are clearly indicated on the first page of each file where
 * they apply.
 */

#include "bdm-semihost.h"
#include "bdm-gdb.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>

/*
 * open -- Open a file.
 * input parameters:
 *   0 : fname ptr
 *   1 : fname length
 *   2 : flags
 *   3 : mode
 * output parameters:
 *   0 : result
 *   1 : errno
 */

int open (const char *fname, int flags, ...)
{
  gdb_parambuf_t parameters;
  parameters[0] = (uint32_t) fname;
  parameters[1] = strlen (fname) + 1;
  parameters[2] = convert_to_gdb_open_flags (flags);
  if (flags & O_CREAT)
    {
      va_list ap;
      va_start (ap, flags);
      parameters[3] = convert_to_gdb_mode_t (va_arg (ap, mode_t));
      va_end (ap);
    }
  else
    parameters[3] = 0;
  __bdm_semihost (BDM_OPEN, parameters);
  errno = convert_from_gdb_errno (parameters[1]);
  return parameters[0];
}