1 /**************************************************************************** 2 * Copyright (c) 1998-2009,2010 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, 1995,1997 * 31 ****************************************************************************/ 32 33 #include "form.priv.h" 34 35 MODULE_ID("$Id: fld_newftyp.c,v 1.19 2010/01/23 21:14:36 tom Exp $") 36 37 static FIELDTYPE default_fieldtype = 38 { 39 0, /* status */ 40 0L, /* reference count */ 41 (FIELDTYPE *)0, /* pointer to left operand */ 42 (FIELDTYPE *)0, /* pointer to right operand */ 43 NULL, /* makearg function */ 44 NULL, /* copyarg function */ 45 NULL, /* freearg function */ 46 INIT_FT_FUNC(NULL), /* field validation function */ 47 INIT_FT_FUNC(NULL), /* Character check function */ 48 INIT_FT_FUNC(NULL), /* enumerate next function */ 49 INIT_FT_FUNC(NULL), /* enumerate previous function */ 50 #if NCURSES_INTEROP_FUNCS 51 NULL /* generic callback alternative to makearg */ 52 #endif 53 }; 54 55 NCURSES_EXPORT_VAR(FIELDTYPE *) 56 _nc_Default_FieldType = &default_fieldtype; 57 58 /*--------------------------------------------------------------------------- 59 | Facility : libnform 60 | Function : FIELDTYPE *new_fieldtype( 61 | bool (* const field_check)(FIELD *,const void *), 62 | bool (* const char_check) (int, const void *) ) 63 | 64 | Description : Create a new fieldtype. The application programmer must 65 | write a field_check and a char_check function and give 66 | them as input to this call. 67 | If an error occurs, errno is set to 68 | E_BAD_ARGUMENT - invalid arguments 69 | E_SYSTEM_ERROR - system error (no memory) 70 | 71 | Return Values : Fieldtype pointer or NULL if error occurred 72 +--------------------------------------------------------------------------*/ 73 NCURSES_EXPORT(FIELDTYPE *) 74 new_fieldtype(bool (*const field_check) (FIELD *, const void *), 75 bool (*const char_check) (int, const void *)) 76 { 77 FIELDTYPE *nftyp = (FIELDTYPE *)0; 78 79 T((T_CALLED("new_fieldtype(%p,%p)"), field_check, char_check)); 80 if ((field_check) || (char_check)) 81 { 82 nftyp = typeMalloc(FIELDTYPE, 1); 83 84 if (nftyp) 85 { 86 T((T_CREATE("fieldtype %p"), (void *)nftyp)); 87 *nftyp = default_fieldtype; 88 #if NCURSES_INTEROP_FUNCS 89 nftyp->fieldcheck.ofcheck = field_check; 90 nftyp->charcheck.occheck = char_check; 91 #else 92 nftyp->fcheck = field_check; 93 nftyp->ccheck = char_check; 94 #endif 95 } 96 else 97 { 98 SET_ERROR(E_SYSTEM_ERROR); 99 } 100 } 101 else 102 { 103 SET_ERROR(E_BAD_ARGUMENT); 104 } 105 returnFieldType(nftyp); 106 } 107 108 /*--------------------------------------------------------------------------- 109 | Facility : libnform 110 | Function : int free_fieldtype(FIELDTYPE *typ) 111 | 112 | Description : Release the memory associated with this fieldtype. 113 | 114 | Return Values : E_OK - success 115 | E_CONNECTED - there are fields referencing the type 116 | E_BAD_ARGUMENT - invalid fieldtype pointer 117 +--------------------------------------------------------------------------*/ 118 NCURSES_EXPORT(int) 119 free_fieldtype(FIELDTYPE *typ) 120 { 121 T((T_CALLED("free_fieldtype(%p)"), (void *)typ)); 122 123 if (!typ) 124 RETURN(E_BAD_ARGUMENT); 125 126 if (typ->ref != 0) 127 RETURN(E_CONNECTED); 128 129 if (typ->status & _RESIDENT) 130 RETURN(E_CONNECTED); 131 132 if (typ->status & _LINKED_TYPE) 133 { 134 if (typ->left) 135 typ->left->ref--; 136 if (typ->right) 137 typ->right->ref--; 138 } 139 free(typ); 140 RETURN(E_OK); 141 } 142 143 /* fld_newftyp.c ends here */ 144