diff options
Diffstat (limited to 'ncurses-5.3/form/fld_newftyp.c')
| -rw-r--r-- | ncurses-5.3/form/fld_newftyp.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/ncurses-5.3/form/fld_newftyp.c b/ncurses-5.3/form/fld_newftyp.c new file mode 100644 index 0000000..3c38c81 --- /dev/null +++ b/ncurses-5.3/form/fld_newftyp.c @@ -0,0 +1,128 @@ +/**************************************************************************** + * Copyright (c) 1998,2000 Free Software Foundation, Inc. * + * * + * Permission is hereby granted, free of charge, to any person obtaining a * + * copy of this software and associated documentation files (the * + * "Software"), to deal in the Software without restriction, including * + * without limitation the rights to use, copy, modify, merge, publish, * + * distribute, distribute with modifications, sublicense, and/or sell * + * copies of the Software, and to permit persons to whom the Software is * + * furnished to do so, subject to the following conditions: * + * * + * The above copyright notice and this permission notice shall be included * + * in all copies or substantial portions of the Software. * + * * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * + * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * + * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * + * * + * Except as contained in this notice, the name(s) of the above copyright * + * holders shall not be used in advertising or otherwise to promote the * + * sale, use or other dealings in this Software without prior written * + * authorization. * + ****************************************************************************/ + +/**************************************************************************** + * Author: Juergen Pfeifer, 1995,1997 * + * Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en * + ****************************************************************************/ + +#include "form.priv.h" + +MODULE_ID("$Id$") + +static FIELDTYPE const default_fieldtype = { + 0, /* status */ + 0L, /* reference count */ + (FIELDTYPE *)0, /* pointer to left operand */ + (FIELDTYPE *)0, /* pointer to right operand */ + NULL, /* makearg function */ + NULL, /* copyarg function */ + NULL, /* freearg function */ + NULL, /* field validation function */ + NULL, /* Character check function */ + NULL, /* enumerate next function */ + NULL /* enumerate previous function */ +}; + +NCURSES_EXPORT_VAR(const FIELDTYPE*) _nc_Default_FieldType = &default_fieldtype; + +/*--------------------------------------------------------------------------- +| Facility : libnform +| Function : FIELDTYPE *new_fieldtype( +| bool (* const field_check)(FIELD *,const void *), +| bool (* const char_check) (int, const void *) ) +| +| Description : Create a new fieldtype. The application programmer must +| write a field_check and a char_check function and give +| them as input to this call. +| If an error occurs, errno is set to +| E_BAD_ARGUMENT - invalid arguments +| E_SYSTEM_ERROR - system error (no memory) +| +| Return Values : Fieldtype pointer or NULL if error occured ++--------------------------------------------------------------------------*/ +NCURSES_EXPORT(FIELDTYPE *) +new_fieldtype ( + bool (* const field_check)(FIELD *,const void *), + bool (* const char_check) (int,const void *) ) +{ + FIELDTYPE *nftyp = (FIELDTYPE *)0; + + if ( (field_check) || (char_check) ) + { + nftyp = (FIELDTYPE *)malloc(sizeof(FIELDTYPE)); + if (nftyp) + { + *nftyp = default_fieldtype; + nftyp->fcheck = field_check; + nftyp->ccheck = char_check; + } + else + { + SET_ERROR( E_SYSTEM_ERROR ); + } + } + else + { + SET_ERROR( E_BAD_ARGUMENT ); + } + return nftyp; +} + +/*--------------------------------------------------------------------------- +| Facility : libnform +| Function : int free_fieldtype(FIELDTYPE *typ) +| +| Description : Release the memory associated with this fieldtype. +| +| Return Values : E_OK - success +| E_CONNECTED - there are fields referencing the type +| E_BAD_ARGUMENT - invalid fieldtype pointer ++--------------------------------------------------------------------------*/ +NCURSES_EXPORT(int) +free_fieldtype (FIELDTYPE *typ) +{ + if (!typ) + RETURN(E_BAD_ARGUMENT); + + if (typ->ref!=0) + RETURN(E_CONNECTED); + + if (typ->status & _RESIDENT) + RETURN(E_CONNECTED); + + if (typ->status & _LINKED_TYPE) + { + if (typ->left ) typ->left->ref--; + if (typ->right) typ->right->ref--; + } + free(typ); + RETURN(E_OK); +} + +/* fld_newftyp.c ends here */ |