1 /**************************************************************************** 2 * Copyright 2018,2020 Thomas E. Dickey * 3 * Copyright 1998-2010,2016 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 1.22 2020/02/02 23:34:34 tom Exp $") 37 38 static FIELDTYPE 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 INIT_FT_FUNC(NULL), /* field validation function */ 48 INIT_FT_FUNC(NULL), /* Character check function */ 49 INIT_FT_FUNC(NULL), /* enumerate next function */ 50 INIT_FT_FUNC(NULL), /* enumerate previous function */ 51 #if NCURSES_INTEROP_FUNCS 52 NULL /* generic callback alternative to makearg */ 53 #endif 54 }; 55 56 NCURSES_EXPORT_VAR(FIELDTYPE *) 57 _nc_Default_FieldType = &default_fieldtype; 58 59 /*--------------------------------------------------------------------------- 60 | Facility : libnform 61 | Function : FIELDTYPE *new_fieldtype( 62 | bool (* const field_check)(FIELD *,const void *), 63 | bool (* const char_check) (int, const void *) ) 64 | 65 | Description : Create a new fieldtype. The application programmer must 66 | write a field_check and a char_check function and give 67 | them as input to this call. 68 | If an error occurs, errno is set to 69 | E_BAD_ARGUMENT - invalid arguments 70 | E_SYSTEM_ERROR - system error (no memory) 71 | 72 | Return Values : Fieldtype pointer or NULL if error occurred 73 +--------------------------------------------------------------------------*/ 74 NCURSES_EXPORT(FIELDTYPE *) 75 new_fieldtype(bool (*const field_check) (FIELD *, const void *), 76 bool (*const char_check) (int, const void *)) 77 { 78 FIELDTYPE *nftyp = (FIELDTYPE *)0; 79 80 TR_FUNC_BFR(2); 81 82 T((T_CALLED("new_fieldtype(%s,%s)"), 83 TR_FUNC_ARG(0, field_check), 84 TR_FUNC_ARG(1, char_check))); 85 86 if ((field_check) || (char_check)) 87 { 88 nftyp = typeMalloc(FIELDTYPE, 1); 89 90 if (nftyp) 91 { 92 T((T_CREATE("fieldtype %p"), (void *)nftyp)); 93 *nftyp = default_fieldtype; 94 #if NCURSES_INTEROP_FUNCS 95 nftyp->fieldcheck.ofcheck = field_check; 96 nftyp->charcheck.occheck = char_check; 97 #else 98 nftyp->fcheck = field_check; 99 nftyp->ccheck = char_check; 100 #endif 101 } 102 else 103 { 104 SET_ERROR(E_SYSTEM_ERROR); 105 } 106 } 107 else 108 { 109 SET_ERROR(E_BAD_ARGUMENT); 110 } 111 returnFieldType(nftyp); 112 } 113 114 /*--------------------------------------------------------------------------- 115 | Facility : libnform 116 | Function : int free_fieldtype(FIELDTYPE *typ) 117 | 118 | Description : Release the memory associated with this fieldtype. 119 | 120 | Return Values : E_OK - success 121 | E_CONNECTED - there are fields referencing the type 122 | E_BAD_ARGUMENT - invalid fieldtype pointer 123 +--------------------------------------------------------------------------*/ 124 NCURSES_EXPORT(int) 125 free_fieldtype(FIELDTYPE *typ) 126 { 127 T((T_CALLED("free_fieldtype(%p)"), (void *)typ)); 128 129 if (!typ) 130 RETURN(E_BAD_ARGUMENT); 131 132 if (typ->ref != 0) 133 RETURN(E_CONNECTED); 134 135 if (typ->status & _RESIDENT) 136 RETURN(E_CONNECTED); 137 138 if (typ->status & _LINKED_TYPE) 139 { 140 if (typ->left) 141 typ->left->ref--; 142 if (typ->right) 143 typ->right->ref--; 144 } 145 free(typ); 146 RETURN(E_OK); 147 } 148 149 /* fld_newftyp.c ends here */ 150