1 /* $OpenBSD: fld_newftyp.c,v 1.7 2015/01/23 22:48:51 krw Exp $ */ 2 /**************************************************************************** 3 * Copyright (c) 1998-2004,2007 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Juergen Pfeifer, 1995,1997 * 32 ****************************************************************************/ 33 34 #include "form.priv.h" 35 36 MODULE_ID("$Id: fld_newftyp.c,v 1.7 2015/01/23 22:48:51 krw Exp $") 37 38 static FIELDTYPE const default_fieldtype = 39 { 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 *) 54 _nc_Default_FieldType = &default_fieldtype; 55 56 /*--------------------------------------------------------------------------- 57 | Facility : libnform 58 | Function : FIELDTYPE *new_fieldtype( 59 | bool (* const field_check)(FIELD *,const void *), 60 | bool (* const char_check) (int, const void *) ) 61 | 62 | Description : Create a new fieldtype. The application programmer must 63 | write a field_check and a char_check function and give 64 | them as input to this call. 65 | If an error occurs, errno is set to 66 | E_BAD_ARGUMENT - invalid arguments 67 | E_SYSTEM_ERROR - system error (no memory) 68 | 69 | Return Values : Fieldtype pointer or NULL if error occurred 70 +--------------------------------------------------------------------------*/ 71 NCURSES_EXPORT(FIELDTYPE *) 72 new_fieldtype(bool (*const field_check) (FIELD *, const void *), 73 bool (*const char_check) (int, const void *)) 74 { 75 FIELDTYPE *nftyp = (FIELDTYPE *)0; 76 77 T((T_CALLED("new_fieldtype(%p,%p)"), field_check, char_check)); 78 if ((field_check) || (char_check)) 79 { 80 nftyp = typeMalloc(FIELDTYPE, 1); 81 82 if (nftyp) 83 { 84 T((T_CREATE("fieldtype %p"), nftyp)); 85 *nftyp = default_fieldtype; 86 nftyp->fcheck = field_check; 87 nftyp->ccheck = char_check; 88 } 89 else 90 { 91 SET_ERROR(E_SYSTEM_ERROR); 92 } 93 } 94 else 95 { 96 SET_ERROR(E_BAD_ARGUMENT); 97 } 98 returnFieldType(nftyp); 99 } 100 101 /*--------------------------------------------------------------------------- 102 | Facility : libnform 103 | Function : int free_fieldtype(FIELDTYPE *typ) 104 | 105 | Description : Release the memory associated with this fieldtype. 106 | 107 | Return Values : E_OK - success 108 | E_CONNECTED - there are fields referencing the type 109 | E_BAD_ARGUMENT - invalid fieldtype pointer 110 +--------------------------------------------------------------------------*/ 111 NCURSES_EXPORT(int) 112 free_fieldtype(FIELDTYPE *typ) 113 { 114 T((T_CALLED("free_fieldtype(%p)"), typ)); 115 116 if (!typ) 117 RETURN(E_BAD_ARGUMENT); 118 119 if (typ->ref != 0) 120 RETURN(E_CONNECTED); 121 122 if (typ->status & _RESIDENT) 123 RETURN(E_CONNECTED); 124 125 if (typ->status & _LINKED_TYPE) 126 { 127 if (typ->left) 128 typ->left->ref--; 129 if (typ->right) 130 typ->right->ref--; 131 } 132 free(typ); 133 RETURN(E_OK); 134 } 135 136 /* fld_newftyp.c ends here */ 137