1 /* $OpenBSD: fld_newftyp.c,v 1.8 2023/10/17 09:52:10 nicm Exp $ */ 2 /**************************************************************************** 3 * Copyright 2018,2020 Thomas E. Dickey * 4 * Copyright 1998-2010,2016 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, 1995,1997 * 33 ****************************************************************************/ 34 35 #include "form.priv.h" 36 37 MODULE_ID("$Id: fld_newftyp.c,v 1.8 2023/10/17 09:52:10 nicm Exp $") 38 39 static FIELDTYPE default_fieldtype = 40 { 41 0, /* status */ 42 0L, /* reference count */ 43 (FIELDTYPE *)0, /* pointer to left operand */ 44 (FIELDTYPE *)0, /* pointer to right operand */ 45 NULL, /* makearg function */ 46 NULL, /* copyarg function */ 47 NULL, /* freearg function */ 48 INIT_FT_FUNC(NULL), /* field validation function */ 49 INIT_FT_FUNC(NULL), /* Character check function */ 50 INIT_FT_FUNC(NULL), /* enumerate next function */ 51 INIT_FT_FUNC(NULL), /* enumerate previous function */ 52 #if NCURSES_INTEROP_FUNCS 53 NULL /* generic callback alternative to makearg */ 54 #endif 55 }; 56 57 FORM_EXPORT_VAR(FIELDTYPE *) 58 _nc_Default_FieldType = &default_fieldtype; 59 60 /*--------------------------------------------------------------------------- 61 | Facility : libnform 62 | Function : FIELDTYPE *new_fieldtype( 63 | bool (* const field_check)(FIELD *,const void *), 64 | bool (* const char_check) (int, const void *) ) 65 | 66 | Description : Create a new fieldtype. The application programmer must 67 | write a field_check and a char_check function and give 68 | them as input to this call. 69 | If an error occurs, errno is set to 70 | E_BAD_ARGUMENT - invalid arguments 71 | E_SYSTEM_ERROR - system error (no memory) 72 | 73 | Return Values : Fieldtype pointer or NULL if error occurred 74 +--------------------------------------------------------------------------*/ 75 FORM_EXPORT(FIELDTYPE *) 76 new_fieldtype(bool (*const field_check) (FIELD *, const void *), 77 bool (*const char_check) (int, const void *)) 78 { 79 FIELDTYPE *nftyp = (FIELDTYPE *)0; 80 81 TR_FUNC_BFR(2); 82 83 T((T_CALLED("new_fieldtype(%s,%s)"), 84 TR_FUNC_ARG(0, field_check), 85 TR_FUNC_ARG(1, char_check))); 86 87 if ((field_check) || (char_check)) 88 { 89 nftyp = typeMalloc(FIELDTYPE, 1); 90 91 if (nftyp) 92 { 93 T((T_CREATE("fieldtype %p"), (void *)nftyp)); 94 *nftyp = default_fieldtype; 95 #if NCURSES_INTEROP_FUNCS 96 nftyp->fieldcheck.ofcheck = field_check; 97 nftyp->charcheck.occheck = char_check; 98 #else 99 nftyp->fcheck = field_check; 100 nftyp->ccheck = char_check; 101 #endif 102 } 103 else 104 { 105 SET_ERROR(E_SYSTEM_ERROR); 106 } 107 } 108 else 109 { 110 SET_ERROR(E_BAD_ARGUMENT); 111 } 112 returnFieldType(nftyp); 113 } 114 115 /*--------------------------------------------------------------------------- 116 | Facility : libnform 117 | Function : int free_fieldtype(FIELDTYPE *typ) 118 | 119 | Description : Release the memory associated with this fieldtype. 120 | 121 | Return Values : E_OK - success 122 | E_CONNECTED - there are fields referencing the type 123 | E_BAD_ARGUMENT - invalid fieldtype pointer 124 +--------------------------------------------------------------------------*/ 125 FORM_EXPORT(int) 126 free_fieldtype(FIELDTYPE *typ) 127 { 128 T((T_CALLED("free_fieldtype(%p)"), (void *)typ)); 129 130 if (!typ) 131 RETURN(E_BAD_ARGUMENT); 132 133 if (typ->ref != 0) 134 RETURN(E_CONNECTED); 135 136 if (typ->status & _RESIDENT) 137 RETURN(E_CONNECTED); 138 139 if (typ->status & _LINKED_TYPE) 140 { 141 if (typ->left) 142 typ->left->ref--; 143 if (typ->right) 144 typ->right->ref--; 145 } 146 free(typ); 147 RETURN(E_OK); 148 } 149 150 /* fld_newftyp.c ends here */ 151