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354 lines
11 KiB
C
354 lines
11 KiB
C
/****************************************************************************
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* Copyright (c) 1998,2000 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_def.c,v 1.13 2000/12/10 02:09:38 tom Exp $")
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/* this can't be readonly */
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static FIELD default_field = {
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0, /* status */
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0, /* rows */
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0, /* cols */
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0, /* frow */
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0, /* fcol */
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0, /* drows */
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0, /* dcols */
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0, /* maxgrow*/
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0, /* nrow */
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0, /* nbuf */
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NO_JUSTIFICATION, /* just */
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0, /* page */
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0, /* index */
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(int)' ', /* pad */
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A_NORMAL, /* fore */
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A_NORMAL, /* back */
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ALL_FIELD_OPTS, /* opts */
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(FIELD *)0, /* snext */
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(FIELD *)0, /* sprev */
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(FIELD *)0, /* link */
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(FORM *)0, /* form */
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(FIELDTYPE *)0, /* type */
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(char *)0, /* arg */
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(char *)0, /* buf */
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(char *)0 /* usrptr */
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};
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NCURSES_EXPORT_VAR(FIELD *) _nc_Default_Field = &default_field;
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : TypeArgument *_nc_Make_Argument(
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| const FIELDTYPE *typ,
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| va_list *ap,
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| int *err )
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| Description : Create an argument structure for the specified type.
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| Use the type-dependant argument list to construct
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| it.
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| Return Values : Pointer to argument structure. Maybe NULL.
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| In case of an error in *err an errorcounter is increased.
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(TypeArgument*)
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_nc_Make_Argument
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(const FIELDTYPE *typ, va_list *ap, int *err)
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{
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TypeArgument *res = (TypeArgument *)0;
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TypeArgument *p;
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if (typ && (typ->status & _HAS_ARGS))
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{
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assert(err && ap);
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if (typ->status & _LINKED_TYPE)
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{
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p = (TypeArgument *)malloc(sizeof(TypeArgument));
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if (p)
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{
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p->left = _nc_Make_Argument(typ->left ,ap,err);
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p->right = _nc_Make_Argument(typ->right,ap,err);
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return p;
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}
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else
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*err += 1;
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} else
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{
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assert(typ->makearg);
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if ( !(res=(TypeArgument *)typ->makearg(ap)) )
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*err += 1;
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}
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}
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return res;
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : TypeArgument *_nc_Copy_Argument(const FIELDTYPE *typ,
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| const TypeArgument *argp,
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| int *err )
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| Description : Create a copy of an argument structure for the specified
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| type.
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| Return Values : Pointer to argument structure. Maybe NULL.
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| In case of an error in *err an errorcounter is increased.
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(TypeArgument*)
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_nc_Copy_Argument
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(const FIELDTYPE *typ,
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const TypeArgument *argp, int *err)
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{
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TypeArgument *res = (TypeArgument *)0;
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TypeArgument *p;
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if ( typ && (typ->status & _HAS_ARGS) )
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{
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assert(err && argp);
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if (typ->status & _LINKED_TYPE)
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{
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p = (TypeArgument *)malloc(sizeof(TypeArgument));
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if (p)
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{
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p->left = _nc_Copy_Argument(typ,argp->left ,err);
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p->right = _nc_Copy_Argument(typ,argp->right,err);
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return p;
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}
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*err += 1;
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}
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else
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{
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if (typ->copyarg)
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{
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if (!(res = (TypeArgument *)(typ->copyarg((const void *)argp))))
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*err += 1;
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}
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else
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res = (TypeArgument *)argp;
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}
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}
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return res;
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : void _nc_Free_Argument(const FIELDTYPE *typ,
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| TypeArgument * argp )
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| Description : Release memory associated with the argument structure
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| for the given fieldtype.
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| Return Values : -
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(void)
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_nc_Free_Argument
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(const FIELDTYPE * typ, TypeArgument * argp)
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{
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if (!typ || !(typ->status & _HAS_ARGS))
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return;
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if (typ->status & _LINKED_TYPE)
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{
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assert(argp);
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_nc_Free_Argument(typ->left ,argp->left );
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_nc_Free_Argument(typ->right,argp->right);
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free(argp);
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}
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else
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{
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if (typ->freearg)
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typ->freearg((void *)argp);
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}
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : bool _nc_Copy_Type( FIELD *dst, FIELD const *src )
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| Description : Copy argument structure of field src to field dst
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| Return Values : TRUE - copy worked
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| FALSE - error occured
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(bool)
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_nc_Copy_Type
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(FIELD *dst, FIELD const *src)
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{
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int err = 0;
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assert(dst && src);
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dst->type = src->type;
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dst->arg = (void *)_nc_Copy_Argument(src->type,(TypeArgument *)(src->arg),&err);
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if (err)
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{
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_nc_Free_Argument(dst->type,(TypeArgument *)(dst->arg));
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dst->type = (FIELDTYPE *)0;
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dst->arg = (void *)0;
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return FALSE;
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}
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else
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{
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if (dst->type)
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dst->type->ref++;
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return TRUE;
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}
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : void _nc_Free_Type( FIELD *field )
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| Description : Release Argument structure for this field
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| Return Values : -
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(void)
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_nc_Free_Type (FIELD *field)
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{
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assert(field);
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if (field->type)
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field->type->ref--;
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_nc_Free_Argument(field->type,(TypeArgument *)(field->arg));
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : FIELD *new_field( int rows, int cols,
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| int frow, int fcol,
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| int nrow, int nbuf )
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| Description : Create a new field with this many 'rows' and 'cols',
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| starting at 'frow/fcol' in the subwindow of the form.
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| Allocate 'nrow' off-screen rows and 'nbuf' additional
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| buffers. If an error occurs, errno is set to
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| E_BAD_ARGUMENT - invalid argument
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| E_SYSTEM_ERROR - system error
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| Return Values : Pointer to the new field or NULL if failure.
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(FIELD *)
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new_field
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(int rows, int cols, int frow, int fcol, int nrow, int nbuf)
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{
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FIELD *New_Field = (FIELD *)0;
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int err = E_BAD_ARGUMENT;
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if (rows>0 &&
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cols>0 &&
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frow>=0 &&
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fcol>=0 &&
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nrow>=0 &&
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nbuf>=0 &&
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((err = E_SYSTEM_ERROR) != 0) && /* trick: this resets the default error */
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(New_Field=(FIELD *)malloc(sizeof(FIELD))) )
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{
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*New_Field = default_field;
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New_Field->rows = rows;
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New_Field->cols = cols;
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New_Field->drows = rows + nrow;
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New_Field->dcols = cols;
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New_Field->frow = frow;
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New_Field->fcol = fcol;
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New_Field->nrow = nrow;
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New_Field->nbuf = nbuf;
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New_Field->link = New_Field;
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if (_nc_Copy_Type(New_Field,&default_field))
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{
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size_t len;
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len = Total_Buffer_Size(New_Field);
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if ((New_Field->buf = (char *)malloc(len)))
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{
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/* Prefill buffers with blanks and insert terminating zeroes
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between buffers */
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int i;
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memset(New_Field->buf,' ',len);
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for(i=0;i<=New_Field->nbuf;i++)
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{
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New_Field->buf[(New_Field->drows*New_Field->cols+1)*(i+1)-1]
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= '\0';
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}
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return New_Field;
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}
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}
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}
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if (New_Field)
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free_field(New_Field);
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SET_ERROR( err );
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return (FIELD *)0;
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : int free_field( FIELD *field )
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| Description : Frees the storage allocated for the field.
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| Return Values : E_OK - success
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| E_BAD_ARGUMENT - invalid field pointer
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| E_CONNECTED - field is connected
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+--------------------------------------------------------------------------*/
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NCURSES_EXPORT(int)
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free_field (FIELD * field)
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{
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if (!field)
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RETURN(E_BAD_ARGUMENT);
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if (field->form)
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RETURN(E_CONNECTED);
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if (field == field->link)
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{
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if (field->buf)
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free(field->buf);
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}
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else
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{
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FIELD *f;
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for(f=field;f->link != field;f = f->link)
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{}
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f->link = field->link;
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}
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_nc_Free_Type(field);
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free(field);
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RETURN(E_OK);
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}
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/* fld_def.c ends here */
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