form/fty_alnum.c

/****************************************************************************
 * Copyright 2020 Thomas E. Dickey                                          *
 * Copyright 1998-2009,2010 Free Software Foundation, Inc.                  *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/***************************************************************************
*                                                                          *
*  Author : Juergen Pfeifer                                                *
*                                                                          *
***************************************************************************/

#include "form.priv.h"

MODULE_ID("$Id: fty_alnum.c,v 1.29 2020/12/12 01:15:37 tom Exp $")

#define thisARG alnumARG

typedef struct
  {
    int width;
  }
thisARG;

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static void *Generic_This_Type(void *arg)
|
|   Description   :  Allocate structure for alphanumeric type argument.
|
|   Return Values :  Pointer to argument structure or NULL on error
+--------------------------------------------------------------------------*/
static void *
Generic_This_Type(void *arg)
{
  thisARG *argp = (thisARG *)0;

  if (arg)
    {
      argp = typeMalloc(thisARG, 1);

      if (argp)
	{
	  T((T_CREATE("thisARG %p"), (void *)argp));
	  argp->width = *((int *)arg);
	}
    }
  return ((void *)argp);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static void *Make_This_Type(va_list *ap)
|
|   Description   :  Allocate structure for alphanumeric type argument.
|
|   Return Values :  Pointer to argument structure or NULL on error
+--------------------------------------------------------------------------*/
static void *
Make_This_Type(va_list *ap)
{
  int w = va_arg(*ap, int);

  return Generic_This_Type((void *)&w);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static void *Copy_ThisType(const void *argp)
|
|   Description   :  Copy structure for alphanumeric type argument.
|
|   Return Values :  Pointer to argument structure or NULL on error.
+--------------------------------------------------------------------------*/
static void *
Copy_This_Type(const void *argp)
{
  const thisARG *ap = (const thisARG *)argp;
  thisARG *result = typeMalloc(thisARG, 1);

  if (result)
    {
      T((T_CREATE("thisARG %p"), (void *)result));
      *result = *ap;
    }

  return ((void *)result);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static void Free_This_Type(void *argp)
|
|   Description   :  Free structure for alphanumeric type argument.
|
|   Return Values :  -
+--------------------------------------------------------------------------*/
static void
Free_This_Type(void *argp)
{
  if (argp)
    free(argp);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static bool Check_This_Character(
|                                      int c,
|                                      const void *argp)
|
|   Description   :  Check a character for the alphanumeric type.
|
|   Return Values :  TRUE  - character is valid
|                    FALSE - character is invalid
+--------------------------------------------------------------------------*/
static bool
Check_This_Character(int c, const void *argp GCC_UNUSED)
{
#if USE_WIDEC_SUPPORT
  if (iswalnum((wint_t)c))
    return TRUE;
#endif
  return (isalnum(UChar(c)) ? TRUE : FALSE);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnform
|   Function      :  static bool Check_This_Field(
|                                      FIELD *field,
|                                      const void *argp)
|
|   Description   :  Validate buffer content to be a valid alphanumeric value
|
|   Return Values :  TRUE  - field is valid
|                    FALSE - field is invalid
+--------------------------------------------------------------------------*/
static bool
Check_This_Field(FIELD *field, const void *argp)
{
  int width = ((const thisARG *)argp)->width;
  unsigned char *bp = (unsigned char *)field_buffer(field, 0);
  bool result = (width < 0);

  Check_CTYPE_Field(result, bp, width, Check_This_Character);
  return (result);
}

static FIELDTYPE typeTHIS =
{
  _HAS_ARGS | _RESIDENT,
  1,				/* this is mutable, so we can't be const */
  (FIELDTYPE *)0,
  (FIELDTYPE *)0,
  Make_This_Type,
  Copy_This_Type,
  Free_This_Type,
  INIT_FT_FUNC(Check_This_Field),
  INIT_FT_FUNC(Check_This_Character),
  INIT_FT_FUNC(NULL),
  INIT_FT_FUNC(NULL),
#if NCURSES_INTEROP_FUNCS
  Generic_This_Type
#endif
};

FORM_EXPORT_VAR(FIELDTYPE *) TYPE_ALNUM = &typeTHIS;

#if NCURSES_INTEROP_FUNCS
/* The next routines are to simplify the use of ncurses from
   programming languages with restrictions on interop with C level
   constructs (e.g. variable access or va_list + ellipsis constructs)
*/
FORM_EXPORT(FIELDTYPE *)
_nc_TYPE_ALNUM(void)
{
  return TYPE_ALNUM;
}
#endif

/* fty_alnum.c ends here */