/**************************************************************************** * 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 */