1 /**************************************************************************** 2 * Copyright (c) 1998,2000 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 * 31 ****************************************************************************/ 32 33 #include "form.priv.h" 34 35 MODULE_ID("$Id: fld_arg.c,v 1.5 2000/12/10 02:09:37 tom Exp $") 36 37 /*--------------------------------------------------------------------------- 38 | Facility : libnform 39 | Function : int set_fieldtype_arg( 40 | FIELDTYPE *typ, 41 | void * (* const make_arg)(va_list *), 42 | void * (* const copy_arg)(const void *), 43 | void (* const free_arg)(void *) ) 44 | 45 | Description : Connects to the type additional arguments necessary 46 | for a set_field_type call. The various function pointer 47 | arguments are: 48 | make_arg : allocates a structure for the field 49 | specific parameters. 50 | copy_arg : duplicate the structure created by 51 | make_arg 52 | free_arg : Release the memory allocated by make_arg 53 | or copy_arg 54 | 55 | At least make_arg must be non-NULL. 56 | You may pass NULL for copy_arg and free_arg if your 57 | make_arg function doesn't allocate memory and your 58 | arg fits into the storage for a (void*). 59 | 60 | Return Values : E_OK - success 61 | E_BAD_ARGUMENT - invalid argument 62 +--------------------------------------------------------------------------*/ 63 NCURSES_EXPORT(int) 64 set_fieldtype_arg 65 (FIELDTYPE * typ, 66 void * (* const make_arg)(va_list *), 67 void * (* const copy_arg)(const void *), 68 void (* const free_arg)(void *)) 69 { 70 if ( !typ || !make_arg ) 71 RETURN(E_BAD_ARGUMENT); 72 73 typ->status |= _HAS_ARGS; 74 typ->makearg = make_arg; 75 typ->copyarg = copy_arg; 76 typ->freearg = free_arg; 77 RETURN(E_OK); 78 } 79 80 /*--------------------------------------------------------------------------- 81 | Facility : libnform 82 | Function : void *field_arg(const FIELD *field) 83 | 84 | Description : Retrieve pointer to the fields argument structure. 85 | 86 | Return Values : Pointer to structure or NULL if none is defined. 87 +--------------------------------------------------------------------------*/ 88 NCURSES_EXPORT(void *) 89 field_arg (const FIELD * field) 90 { 91 return Normalize_Field(field)->arg; 92 } 93 94 /* fld_arg.c ends here */ 95