/**************************************************************************** * Copyright (c) 1998-2002,2003 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, 1995,1997                                    * ****************************************************************************/#include "form.priv.h"MODULE_ID("$Id: fld_def.c,v 1.17 2003/11/08 21:15:02 Jonathon.Gray 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 */};NCURSES_EXPORT_VAR(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-dependent argument list to construct|                    it.||   Return Values :  Pointer to argument structure. Maybe NULL.|                    In case of an error in *err an error counter is increased. +--------------------------------------------------------------------------*/NCURSES_EXPORT(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 error counter is increased. +--------------------------------------------------------------------------*/NCURSES_EXPORT(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 :  -+--------------------------------------------------------------------------*/NCURSES_EXPORT(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 occurred+--------------------------------------------------------------------------*/NCURSES_EXPORT(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 :  -+--------------------------------------------------------------------------*/NCURSES_EXPORT(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.+--------------------------------------------------------------------------*/NCURSES_EXPORT(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+--------------------------------------------------------------------------*/NCURSES_EXPORT(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 */