1 /* $OpenBSD: fld_newftyp.c,v 1.5 2001/01/22 18:02:13 millert Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998,2000 Free Software Foundation, Inc. * 5 * * 6 * Permission is hereby granted, free of charge, to any person obtaining a * 7 * copy of this software and associated documentation files (the * 8 * "Software"), to deal in the Software without restriction, including * 9 * without limitation the rights to use, copy, modify, merge, publish, * 10 * distribute, distribute with modifications, sublicense, and/or sell * 11 * copies of the Software, and to permit persons to whom the Software is * 12 * furnished to do so, subject to the following conditions: * 13 * * 14 * The above copyright notice and this permission notice shall be included * 15 * in all copies or substantial portions of the Software. * 16 * * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 24 * * 25 * Except as contained in this notice, the name(s) of the above copyright * 26 * holders shall not be used in advertising or otherwise to promote the * 27 * sale, use or other dealings in this Software without prior written * 28 * authorization. * 29 ****************************************************************************/ 30 31 /**************************************************************************** 32 * Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997 * 33 ****************************************************************************/ 34 35 #include "form.priv.h" 36 37 MODULE_ID("$From: fld_newftyp.c,v 1.6 2000/12/10 02:09:38 tom Exp $") 38 39 static FIELDTYPE const default_fieldtype = { 40 0, /* status */ 41 0L, /* reference count */ 42 (FIELDTYPE *)0, /* pointer to left operand */ 43 (FIELDTYPE *)0, /* pointer to right operand */ 44 NULL, /* makearg function */ 45 NULL, /* copyarg function */ 46 NULL, /* freearg function */ 47 NULL, /* field validation function */ 48 NULL, /* Character check function */ 49 NULL, /* enumerate next function */ 50 NULL /* enumerate previous function */ 51 }; 52 53 NCURSES_EXPORT_VAR(const FIELDTYPE*) _nc_Default_FieldType = &default_fieldtype; 54 55 /*--------------------------------------------------------------------------- 56 | Facility : libnform 57 | Function : FIELDTYPE *new_fieldtype( 58 | bool (* const field_check)(FIELD *,const void *), 59 | bool (* const char_check) (int, const void *) ) 60 | 61 | Description : Create a new fieldtype. The application programmer must 62 | write a field_check and a char_check function and give 63 | them as input to this call. 64 | If an error occurs, errno is set to 65 | E_BAD_ARGUMENT - invalid arguments 66 | E_SYSTEM_ERROR - system error (no memory) 67 | 68 | Return Values : Fieldtype pointer or NULL if error occured 69 +--------------------------------------------------------------------------*/ 70 NCURSES_EXPORT(FIELDTYPE *) 71 new_fieldtype ( 72 bool (* const field_check)(FIELD *,const void *), 73 bool (* const char_check) (int,const void *) ) 74 { 75 FIELDTYPE *nftyp = (FIELDTYPE *)0; 76 77 if ( (field_check) || (char_check) ) 78 { 79 nftyp = (FIELDTYPE *)malloc(sizeof(FIELDTYPE)); 80 if (nftyp) 81 { 82 *nftyp = default_fieldtype; 83 nftyp->fcheck = field_check; 84 nftyp->ccheck = char_check; 85 } 86 else 87 { 88 SET_ERROR( E_SYSTEM_ERROR ); 89 } 90 } 91 else 92 { 93 SET_ERROR( E_BAD_ARGUMENT ); 94 } 95 return nftyp; 96 } 97 98 /*--------------------------------------------------------------------------- 99 | Facility : libnform 100 | Function : int free_fieldtype(FIELDTYPE *typ) 101 | 102 | Description : Release the memory associated with this fieldtype. 103 | 104 | Return Values : E_OK - success 105 | E_CONNECTED - there are fields referencing the type 106 | E_BAD_ARGUMENT - invalid fieldtype pointer 107 +--------------------------------------------------------------------------*/ 108 NCURSES_EXPORT(int) 109 free_fieldtype (FIELDTYPE *typ) 110 { 111 if (!typ) 112 RETURN(E_BAD_ARGUMENT); 113 114 if (typ->ref!=0) 115 RETURN(E_CONNECTED); 116 117 if (typ->status & _RESIDENT) 118 RETURN(E_CONNECTED); 119 120 if (typ->status & _LINKED_TYPE) 121 { 122 if (typ->left ) typ->left->ref--; 123 if (typ->right) typ->right->ref--; 124 } 125 free(typ); 126 RETURN(E_OK); 127 } 128 129 /* fld_newftyp.c ends here */ 130