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|
/* $OpenBSD: fld_def.c,v 1.3 1997/12/03 05:39:52 millert Exp $ */
/*-----------------------------------------------------------------------------+
| The ncurses form library is Copyright (C) 1995-1997 |
| by Juergen Pfeifer <Juergen.Pfeifer@T-Online.de> |
| All Rights Reserved. |
| |
| Permission to use, copy, modify, and distribute this software and its |
| documentation for any purpose and without fee is hereby granted, provided |
| that the above copyright notice appear in all copies and that both that |
| copyright notice and this permission notice appear in supporting |
| documentation, and that the name of the above listed copyright holder(s) not |
| be used in advertising or publicity pertaining to distribution of the |
| software without specific, written prior permission. |
| |
| THE ABOVE LISTED COPYRIGHT HOLDER(S) DISCLAIM ALL WARRANTIES WITH REGARD TO |
| THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT- |
| NESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR |
| ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RE- |
| SULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, |
| NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH |
| THE USE OR PERFORMANCE OF THIS SOFTWARE. |
+-----------------------------------------------------------------------------*/
#include "form.priv.h"
MODULE_ID("Id: fld_def.c,v 1.9 1997/10/21 13:24:19 juergen Exp $")
/* this can't be readonly */
static FIELD default_field = {
0, /* status */
0, /* rows */
0, /* cols */
0, /* frow */
0, /* fcol */
0, /* drows */
0, /* dcols */
0, /* maxgrow*/
0, /* nrow */
0, /* nbuf */
NO_JUSTIFICATION, /* just */
0, /* page */
0, /* index */
(int)' ', /* pad */
A_NORMAL, /* fore */
A_NORMAL, /* back */
ALL_FIELD_OPTS, /* opts */
(FIELD *)0, /* snext */
(FIELD *)0, /* sprev */
(FIELD *)0, /* link */
(FORM *)0, /* form */
(FIELDTYPE *)0, /* type */
(char *)0, /* arg */
(char *)0, /* buf */
(char *)0 /* usrptr */
};
FIELD *_nc_Default_Field = &default_field;
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : TypeArgument *_nc_Make_Argument(
| const FIELDTYPE *typ,
| va_list *ap,
| int *err )
|
| Description : Create an argument structure for the specified type.
| Use the type-dependant argument list to construct
| it.
|
| Return Values : Pointer to argument structure. Maybe NULL.
| In case of an error in *err an errorcounter is increased.
+--------------------------------------------------------------------------*/
TypeArgument*
_nc_Make_Argument(const FIELDTYPE *typ, va_list *ap, int *err)
{
TypeArgument *res = (TypeArgument *)0;
TypeArgument *p;
if (typ && (typ->status & _HAS_ARGS))
{
assert(err && ap);
if (typ->status & _LINKED_TYPE)
{
p = (TypeArgument *)malloc(sizeof(TypeArgument));
if (p)
{
p->left = _nc_Make_Argument(typ->left ,ap,err);
p->right = _nc_Make_Argument(typ->right,ap,err);
return p;
}
else
*err += 1;
} else
{
assert(typ->makearg);
if ( !(res=(TypeArgument *)typ->makearg(ap)) )
*err += 1;
}
}
return res;
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : TypeArgument *_nc_Copy_Argument(const FIELDTYPE *typ,
| const TypeArgument *argp,
| int *err )
|
| Description : Create a copy of an argument structure for the specified
| type.
|
| Return Values : Pointer to argument structure. Maybe NULL.
| In case of an error in *err an errorcounter is increased.
+--------------------------------------------------------------------------*/
TypeArgument*
_nc_Copy_Argument(const FIELDTYPE *typ,
const TypeArgument *argp, int *err)
{
TypeArgument *res = (TypeArgument *)0;
TypeArgument *p;
if ( typ && (typ->status & _HAS_ARGS) )
{
assert(err && argp);
if (typ->status & _LINKED_TYPE)
{
p = (TypeArgument *)malloc(sizeof(TypeArgument));
if (p)
{
p->left = _nc_Copy_Argument(typ,argp->left ,err);
p->right = _nc_Copy_Argument(typ,argp->right,err);
return p;
}
*err += 1;
}
else
{
if (typ->copyarg)
{
if (!(res = (TypeArgument *)(typ->copyarg((const void *)argp))))
*err += 1;
}
else
res = (TypeArgument *)argp;
}
}
return res;
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : void _nc_Free_Argument(const FIELDTYPE *typ,
| TypeArgument * argp )
|
| Description : Release memory associated with the argument structure
| for the given fieldtype.
|
| Return Values : -
+--------------------------------------------------------------------------*/
void
_nc_Free_Argument(const FIELDTYPE * typ, TypeArgument * argp)
{
if (!typ || !(typ->status & _HAS_ARGS))
return;
if (typ->status & _LINKED_TYPE)
{
assert(argp);
_nc_Free_Argument(typ->left ,argp->left );
_nc_Free_Argument(typ->right,argp->right);
free(argp);
}
else
{
if (typ->freearg)
typ->freearg((void *)argp);
}
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : bool _nc_Copy_Type( FIELD *dst, FIELD const *src )
|
| Description : Copy argument structure of field src to field dst
|
| Return Values : TRUE - copy worked
| FALSE - error occured
+--------------------------------------------------------------------------*/
bool
_nc_Copy_Type(FIELD *dst, FIELD const *src)
{
int err = 0;
assert(dst && src);
dst->type = src->type;
dst->arg = (void *)_nc_Copy_Argument(src->type,(TypeArgument *)(src->arg),&err);
if (err)
{
_nc_Free_Argument(dst->type,(TypeArgument *)(dst->arg));
dst->type = (FIELDTYPE *)0;
dst->arg = (void *)0;
return FALSE;
}
else
{
if (dst->type)
dst->type->ref++;
return TRUE;
}
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : void _nc_Free_Type( FIELD *field )
|
| Description : Release Argument structure for this field
|
| Return Values : -
+--------------------------------------------------------------------------*/
void
_nc_Free_Type(FIELD *field)
{
assert(field);
if (field->type)
field->type->ref--;
_nc_Free_Argument(field->type,(TypeArgument *)(field->arg));
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : FIELD *new_field( int rows, int cols,
| int frow, int fcol,
| int nrow, int nbuf )
|
| Description : Create a new field with this many 'rows' and 'cols',
| starting at 'frow/fcol' in the subwindow of the form.
| Allocate 'nrow' off-screen rows and 'nbuf' additional
| buffers. If an error occurs, errno is set to
|
| E_BAD_ARGUMENT - invalid argument
| E_SYSTEM_ERROR - system error
|
| Return Values : Pointer to the new field or NULL if failure.
+--------------------------------------------------------------------------*/
FIELD *new_field(int rows, int cols, int frow, int fcol, int nrow, int nbuf)
{
FIELD *New_Field = (FIELD *)0;
int err = E_BAD_ARGUMENT;
if (rows>0 &&
cols>0 &&
frow>=0 &&
fcol>=0 &&
nrow>=0 &&
nbuf>=0 &&
((err = E_SYSTEM_ERROR) != 0) && /* trick: this resets the default error */
(New_Field=(FIELD *)malloc(sizeof(FIELD))) )
{
*New_Field = default_field;
New_Field->rows = rows;
New_Field->cols = cols;
New_Field->drows = rows + nrow;
New_Field->dcols = cols;
New_Field->frow = frow;
New_Field->fcol = fcol;
New_Field->nrow = nrow;
New_Field->nbuf = nbuf;
New_Field->link = New_Field;
if (_nc_Copy_Type(New_Field,&default_field))
{
size_t len;
len = Total_Buffer_Size(New_Field);
if ((New_Field->buf = (char *)malloc(len)))
{
/* Prefill buffers with blanks and insert terminating zeroes
between buffers */
int i;
memset(New_Field->buf,' ',len);
for(i=0;i<=New_Field->nbuf;i++)
{
New_Field->buf[(New_Field->drows*New_Field->cols+1)*(i+1)-1]
= '\0';
}
return New_Field;
}
}
}
if (New_Field)
free_field(New_Field);
SET_ERROR( err );
return (FIELD *)0;
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : int free_field( FIELD *field )
|
| Description : Frees the storage allocated for the field.
|
| Return Values : E_OK - success
| E_BAD_ARGUMENT - invalid field pointer
| E_CONNECTED - field is connected
+--------------------------------------------------------------------------*/
int free_field(FIELD * field)
{
if (!field)
RETURN(E_BAD_ARGUMENT);
if (field->form)
RETURN(E_CONNECTED);
if (field == field->link)
{
if (field->buf)
free(field->buf);
}
else
{
FIELD *f;
for(f=field;f->link != field;f = f->link)
{}
f->link = field->link;
}
_nc_Free_Type(field);
free(field);
RETURN(E_OK);
}
/* fld_def.c ends here */
|
