/*
 * msvcrt.dll errno functions
 *
 * Copyright 2000 Jon Griffiths
 *
 * 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 2.1 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
 */

#include "msvcrt.h"
#include "msvcrt/errno.h"

#include <stdio.h>
#include <string.h>

#include "msvcrt/conio.h"
#include "msvcrt/stdlib.h"
#include "msvcrt/string.h"


#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);


/* INTERNAL: Set the crt and dos errno's from the OS error given. */
void MSVCRT__set_errno(int err)
{
  int *errno = MSVCRT__errno();
  unsigned long *doserrno = MSVCRT___doserrno();

  *doserrno = err;

  switch(err)
  {
#define ERR_CASE(oserr) case oserr:
#define ERR_MAPS(oserr,crterr) case oserr:*errno = crterr;break;
    ERR_CASE(ERROR_ACCESS_DENIED)
    ERR_CASE(ERROR_NETWORK_ACCESS_DENIED)
    ERR_CASE(ERROR_CANNOT_MAKE)
    ERR_CASE(ERROR_SEEK_ON_DEVICE)
    ERR_CASE(ERROR_LOCK_FAILED)
    ERR_CASE(ERROR_FAIL_I24)
    ERR_CASE(ERROR_CURRENT_DIRECTORY)
    ERR_CASE(ERROR_DRIVE_LOCKED)
    ERR_CASE(ERROR_NOT_LOCKED)
    ERR_CASE(ERROR_INVALID_ACCESS)
    ERR_MAPS(ERROR_LOCK_VIOLATION,       MSVCRT_EACCES);
    ERR_CASE(ERROR_FILE_NOT_FOUND)
    ERR_CASE(ERROR_NO_MORE_FILES)
    ERR_CASE(ERROR_BAD_PATHNAME)
    ERR_CASE(ERROR_BAD_NETPATH)
    ERR_CASE(ERROR_INVALID_DRIVE)
    ERR_CASE(ERROR_BAD_NET_NAME)
    ERR_CASE(ERROR_FILENAME_EXCED_RANGE)
    ERR_MAPS(ERROR_PATH_NOT_FOUND,       MSVCRT_ENOENT);
    ERR_MAPS(ERROR_IO_DEVICE,            MSVCRT_EIO);
    ERR_MAPS(ERROR_BAD_FORMAT,           MSVCRT_ENOEXEC);
    ERR_MAPS(ERROR_INVALID_HANDLE,       MSVCRT_EBADF);
    ERR_CASE(ERROR_OUTOFMEMORY)
    ERR_CASE(ERROR_INVALID_BLOCK)
    ERR_CASE(ERROR_NOT_ENOUGH_QUOTA);
    ERR_MAPS(ERROR_ARENA_TRASHED,        MSVCRT_ENOMEM);
    ERR_MAPS(ERROR_BUSY,                 MSVCRT_EBUSY);
    ERR_CASE(ERROR_ALREADY_EXISTS)
    ERR_MAPS(ERROR_FILE_EXISTS,          MSVCRT_EEXIST);
    ERR_MAPS(ERROR_BAD_DEVICE,           MSVCRT_ENODEV);
    ERR_MAPS(ERROR_TOO_MANY_OPEN_FILES,  MSVCRT_EMFILE);
    ERR_MAPS(ERROR_DISK_FULL,            MSVCRT_ENOSPC);
    ERR_MAPS(ERROR_BROKEN_PIPE,          MSVCRT_EPIPE);
    ERR_MAPS(ERROR_POSSIBLE_DEADLOCK,    MSVCRT_EDEADLK);
    ERR_MAPS(ERROR_DIR_NOT_EMPTY,        MSVCRT_ENOTEMPTY);
    ERR_MAPS(ERROR_BAD_ENVIRONMENT,      MSVCRT_E2BIG);
    ERR_CASE(ERROR_WAIT_NO_CHILDREN)
    ERR_MAPS(ERROR_CHILD_NOT_COMPLETE,   MSVCRT_ECHILD);
    ERR_CASE(ERROR_NO_PROC_SLOTS)
    ERR_CASE(ERROR_MAX_THRDS_REACHED)
    ERR_MAPS(ERROR_NESTING_NOT_ALLOWED,  MSVCRT_EAGAIN);
  default:
    /*  Remaining cases map to EINVAL */
    /* FIXME: may be missing some errors above */
    *errno = MSVCRT_EINVAL;
  }
}

/*********************************************************************
 *		_errno (MSVCRT.@)
 */
int* MSVCRT__errno(void)
{
    return &msvcrt_get_thread_data()->thread_errno;
}

/*********************************************************************
 *		__doserrno (MSVCRT.@)
 */
unsigned long* MSVCRT___doserrno(void)
{
    return &msvcrt_get_thread_data()->thread_doserrno;
}

/*********************************************************************
 *		strerror (MSVCRT.@)
 */
char* MSVCRT_strerror(int err)
{
  return strerror(err); /* FIXME */
}

/**********************************************************************
 *		_strerror	(MSVCRT.@)
 */
char* _strerror(const char* err)
{
  static char strerrbuff[256]; /* FIXME: Per thread, nprintf */
  sprintf(strerrbuff,"%s: %s\n",err,MSVCRT_strerror(msvcrt_get_thread_data()->thread_errno));
  return strerrbuff;
}

/*********************************************************************
 *		perror (MSVCRT.@)
 */
void MSVCRT_perror(const char* str)
{
  _cprintf("%s: %s\n",str,MSVCRT_strerror(msvcrt_get_thread_data()->thread_errno));
}

/******************************************************************************
 *		_set_error_mode (MSVCRT.@)
 *
 * Set the error mode, which describes where the C run-time writes error
 * messages.
 *
 * PARAMS
 *   mode - the new error mode
 *
 * RETURNS
 *   The old error mode.
 *
 * TODO
 *  This function does not have a proper implementation; the error mode is
 *  never used.
 */
int _set_error_mode(int mode)
{
  static int current_mode = _OUT_TO_DEFAULT;

  const int old = current_mode;
  if ( _REPORT_ERRMODE != mode ) {
    current_mode = mode;
    FIXME("dummy implementation (old mode: %d, new mode: %d)\n",
          old, mode);
  }
  return old;
}

/******************************************************************************
 *		_seterrormode (MSVCRT.@)
 */
void _seterrormode(int mode)
{
    SetErrorMode( mode );
}