1 /**************************************************************************** 2 * Copyright (c) 1998-2004,2007 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 1.15 2007/10/13 19:30:55 tom Exp $") 36 37 static FIELDTYPE const 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 NULL, /* field validation function */ 47 NULL, /* Character check function */ 48 NULL, /* enumerate next function */ 49 NULL /* enumerate previous function */ 50 }; 51 52 NCURSES_EXPORT_VAR(const FIELDTYPE *) 53 _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 occurred 69 +--------------------------------------------------------------------------*/ 70 NCURSES_EXPORT(FIELDTYPE *) 71 new_fieldtype(bool (*const field_check) (FIELD *, const void *), 72 bool (*const char_check) (int, const void *)) 73 { 74 FIELDTYPE *nftyp = (FIELDTYPE *)0; 75 76 T((T_CALLED("new_fieldtype(%p,%p)"), field_check, char_check)); 77 if ((field_check) || (char_check)) 78 { 79 nftyp = typeMalloc(FIELDTYPE, 1); 80 81 if (nftyp) 82 { 83 T((T_CREATE("fieldtype %p"), nftyp)); 84 *nftyp = default_fieldtype; 85 nftyp->fcheck = field_check; 86 nftyp->ccheck = char_check; 87 } 88 else 89 { 90 SET_ERROR(E_SYSTEM_ERROR); 91 } 92 } 93 else 94 { 95 SET_ERROR(E_BAD_ARGUMENT); 96 } 97 returnFieldType(nftyp); 98 } 99 100 /*--------------------------------------------------------------------------- 101 | Facility : libnform 102 | Function : int free_fieldtype(FIELDTYPE *typ) 103 | 104 | Description : Release the memory associated with this fieldtype. 105 | 106 | Return Values : E_OK - success 107 | E_CONNECTED - there are fields referencing the type 108 | E_BAD_ARGUMENT - invalid fieldtype pointer 109 +--------------------------------------------------------------------------*/ 110 NCURSES_EXPORT(int) 111 free_fieldtype(FIELDTYPE *typ) 112 { 113 T((T_CALLED("free_fieldtype(%p)"), typ)); 114 115 if (!typ) 116 RETURN(E_BAD_ARGUMENT); 117 118 if (typ->ref != 0) 119 RETURN(E_CONNECTED); 120 121 if (typ->status & _RESIDENT) 122 RETURN(E_CONNECTED); 123 124 if (typ->status & _LINKED_TYPE) 125 { 126 if (typ->left) 127 typ->left->ref--; 128 if (typ->right) 129 typ->right->ref--; 130 } 131 free(typ); 132 RETURN(E_OK); 133 } 134 135 /* fld_newftyp.c ends here */ 136