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 35MODULE_ID("$Id: fld_newftyp.c,v 1.19 2010/01/23 21:14:36 tom Exp $") 36 37static 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 55NCURSES_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+--------------------------------------------------------------------------*/ 73NCURSES_EXPORT(FIELDTYPE *) 74new_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+--------------------------------------------------------------------------*/ 118NCURSES_EXPORT(int) 119free_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