126 lines
5.5 KiB
C
126 lines
5.5 KiB
C
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/****************************************************************************
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* Copyright (c) 1998 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 *
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****************************************************************************/
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#include "form.priv.h"
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MODULE_ID("$Id: fld_newftyp.c,v 1.5 1999/05/16 17:18:54 juergen Exp $")
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static FIELDTYPE const default_fieldtype = {
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0, /* status */
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0L, /* reference count */
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(FIELDTYPE *)0, /* pointer to left operand */
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(FIELDTYPE *)0, /* pointer to right operand */
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NULL, /* makearg function */
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NULL, /* copyarg function */
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NULL, /* freearg function */
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NULL, /* field validation function */
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NULL, /* Character check function */
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NULL, /* enumerate next function */
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NULL /* enumerate previous function */
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};
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const FIELDTYPE* _nc_Default_FieldType = &default_fieldtype;
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : FIELDTYPE *new_fieldtype(
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| bool (* const field_check)(FIELD *,const void *),
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| bool (* const char_check) (int, const void *) )
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| Description : Create a new fieldtype. The application programmer must
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| write a field_check and a char_check function and give
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| them as input to this call.
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| If an error occurs, errno is set to
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| E_BAD_ARGUMENT - invalid arguments
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| E_SYSTEM_ERROR - system error (no memory)
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| Return Values : Fieldtype pointer or NULL if error occured
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+--------------------------------------------------------------------------*/
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FIELDTYPE *new_fieldtype(
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bool (* const field_check)(FIELD *,const void *),
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bool (* const char_check) (int,const void *) )
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{
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FIELDTYPE *nftyp = (FIELDTYPE *)0;
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if ( (field_check) || (char_check) )
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{
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nftyp = (FIELDTYPE *)malloc(sizeof(FIELDTYPE));
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if (nftyp)
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{
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*nftyp = default_fieldtype;
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nftyp->fcheck = field_check;
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nftyp->ccheck = char_check;
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}
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else
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{
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SET_ERROR( E_SYSTEM_ERROR );
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}
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}
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else
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{
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SET_ERROR( E_BAD_ARGUMENT );
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}
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return nftyp;
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : int free_fieldtype(FIELDTYPE *typ)
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| Description : Release the memory associated with this fieldtype.
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| Return Values : E_OK - success
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| E_CONNECTED - there are fields referencing the type
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| E_BAD_ARGUMENT - invalid fieldtype pointer
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+--------------------------------------------------------------------------*/
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int free_fieldtype(FIELDTYPE *typ)
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{
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if (!typ)
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RETURN(E_BAD_ARGUMENT);
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if (typ->ref!=0)
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RETURN(E_CONNECTED);
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if (typ->status & _RESIDENT)
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RETURN(E_CONNECTED);
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if (typ->status & _LINKED_TYPE)
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{
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if (typ->left ) typ->left->ref--;
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if (typ->right) typ->right->ref--;
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}
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free(typ);
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RETURN(E_OK);
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}
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/* fld_newftyp.c ends here */
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