CMakeLua/Source/CursesDialog/form/fld_newftyp.c

   1 /****************************************************************************
   2  * Copyright (c) 1998 Free Software Foundation, Inc.                        *
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   5  * copy of this software and associated documentation files (the            *
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   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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  28
  29 /****************************************************************************
  30  *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
  31  ****************************************************************************/
  32
  33 #include "form.priv.h"
  34
  35 MODULE_ID("$Id: fld_newftyp.c,v 1.1 2001/11/05 16:53:01 berk Exp $")
  36
  37 static FIELDTYPE const default_fieldtype = {
  38   0,                   /* status                                      */
  39   0L,                  /* reference count                             */
  40   (FIELDTYPE *)0,      /* pointer to left  operand                    */
  41   (FIELDTYPE *)0,      /* pointer to right operand                    */
  42   NULL,                /* makearg function                            */
  43   NULL,                /* copyarg function                            */
  44   NULL,                /* freearg function                            */
  45   NULL,                /* field validation function                   */
  46   NULL,                /* Character check function                    */
  47   NULL,                /* enumerate next function                     */
  48   NULL                 /* enumerate previous function                 */
  49 };
  50
  51 const FIELDTYPE* _nc_Default_FieldType = &default_fieldtype;
  52 \f
  53 /*---------------------------------------------------------------------------
  54 |   Facility      :  libnform
  55 |   Function      :  FIELDTYPE *new_fieldtype(
  56 |                       bool (* const field_check)(FIELD *,const void *),
  57 |                       bool (* const char_check) (int, const void *) )
  58 |
  59 |   Description   :  Create a new fieldtype. The application programmer must
  60 |                    write a field_check and a char_check function and give
  61 |                    them as input to this call.
  62 |                    If an error occurs, errno is set to
  63 |                       E_BAD_ARGUMENT  - invalid arguments
  64 |                       E_SYSTEM_ERROR  - system error (no memory)
  65 |
  66 |   Return Values :  Fieldtype pointer or NULL if error occured
  67 +--------------------------------------------------------------------------*/
  68 FIELDTYPE *new_fieldtype(
  69  bool (* const field_check)(FIELD *,const void *),
  70  bool (* const char_check) (int,const void *) )
  71 {
  72   FIELDTYPE *nftyp = (FIELDTYPE *)0;
  73
  74   if ( (field_check) || (char_check) )
  75     {
  76       nftyp = (FIELDTYPE *)malloc(sizeof(FIELDTYPE));
  77       if (nftyp)
  78         {
  79           *nftyp = default_fieldtype;
  80           nftyp->fcheck = field_check;
  81           nftyp->ccheck = char_check;
  82         }
  83       else
  84         {
  85           SET_ERROR( E_SYSTEM_ERROR );
  86         }
  87     }
  88   else
  89     {
  90       SET_ERROR( E_BAD_ARGUMENT );
  91     }
  92   return nftyp;
  93 }
  94
  95 /*---------------------------------------------------------------------------
  96 |   Facility      :  libnform
  97 |   Function      :  int free_fieldtype(FIELDTYPE *typ)
  98 |
  99 |   Description   :  Release the memory associated with this fieldtype.
 100 |
 101 |   Return Values :  E_OK            - success
 102 |                    E_CONNECTED     - there are fields referencing the type
 103 |                    E_BAD_ARGUMENT  - invalid fieldtype pointer
 104 +--------------------------------------------------------------------------*/
 105 int free_fieldtype(FIELDTYPE *typ)
 106 {
 107   if (!typ)
 108     RETURN(E_BAD_ARGUMENT);
 109
 110   if (typ->ref!=0)
 111     RETURN(E_CONNECTED);
 112
 113   if (typ->status & _RESIDENT)
 114     RETURN(E_CONNECTED);
 115
 116   if (typ->status & _LINKED_TYPE)
 117     {
 118       if (typ->left ) typ->left->ref--;
 119       if (typ->right) typ->right->ref--;
 120     }
 121   free(typ);
 122   RETURN(E_OK);
 123 }
 124
 125 /* fld_newftyp.c ends here */