| 1 | /****************************************************************************
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| 2 | * Copyright (c) 1998-2004,2010 Free Software Foundation, Inc. *
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| 3 | * *
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a *
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| 5 | * copy of this software and associated documentation files (the *
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| 6 | * "Software"), to deal in the Software without restriction, including *
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| 7 | * without limitation the rights to use, copy, modify, merge, publish, *
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| 8 | * distribute, distribute with modifications, sublicense, and/or sell *
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| 9 | * copies of the Software, and to permit persons to whom the Software is *
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| 10 | * furnished to do so, subject to the following conditions: *
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| 11 | * *
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| 12 | * The above copyright notice and this permission notice shall be included *
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| 13 | * in all copies or substantial portions of the Software. *
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| 14 | * *
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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| 16 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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| 18 | * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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| 19 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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| 20 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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| 21 | * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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| 22 | * *
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| 23 | * Except as contained in this notice, the name(s) of the above copyright *
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| 24 | * holders shall not be used in advertising or otherwise to promote the *
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| 25 | * sale, use or other dealings in this Software without prior written *
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| 26 | * authorization. *
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| 27 | ****************************************************************************/
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| 28 |
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| 29 | /****************************************************************************
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| 30 | * Author: Juergen Pfeifer, 1995,1997 *
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| 31 | ****************************************************************************/
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| 32 |
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| 33 | #include "form.priv.h"
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| 34 |
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| 35 | MODULE_ID("$Id: fld_arg.c,v 1.12 2010/01/23 21:14:35 tom Exp $")
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| 36 |
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| 37 | /*---------------------------------------------------------------------------
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| 38 | | Facility : libnform
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| 39 | | Function : int set_fieldtype_arg(
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| 40 | | FIELDTYPE *typ,
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| 41 | | void * (* const make_arg)(va_list *),
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| 42 | | void * (* const copy_arg)(const void *),
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| 43 | | void (* const free_arg)(void *) )
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| 44 | |
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| 45 | | Description : Connects to the type additional arguments necessary
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| 46 | | for a set_field_type call. The various function pointer
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| 47 | | arguments are:
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| 48 | | make_arg : allocates a structure for the field
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| 49 | | specific parameters.
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| 50 | | copy_arg : duplicate the structure created by
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| 51 | | make_arg
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| 52 | | free_arg : Release the memory allocated by make_arg
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| 53 | | or copy_arg
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| 54 | |
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| 55 | | At least make_arg must be non-NULL.
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| 56 | | You may pass NULL for copy_arg and free_arg if your
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| 57 | | make_arg function doesn't allocate memory and your
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| 58 | | arg fits into the storage for a (void*).
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| 59 | |
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| 60 | | Return Values : E_OK - success
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| 61 | | E_BAD_ARGUMENT - invalid argument
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| 62 | +--------------------------------------------------------------------------*/
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| 63 | NCURSES_EXPORT(int)
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| 64 | set_fieldtype_arg(FIELDTYPE *typ,
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| 65 | void *(*const make_arg)(va_list *),
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| 66 | void *(*const copy_arg)(const void *),
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| 67 | void (*const free_arg) (void *))
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| 68 | {
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| 69 | T((T_CALLED("set_fieldtype_arg(%p,%p,%p,%p)"),
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| 70 | (void *)typ, make_arg, copy_arg, free_arg));
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| 71 |
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| 72 | if (typ != 0 && make_arg != (void *)0)
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| 73 | {
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| 74 | typ->status |= _HAS_ARGS;
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| 75 | typ->makearg = make_arg;
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| 76 | typ->copyarg = copy_arg;
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| 77 | typ->freearg = free_arg;
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| 78 | RETURN(E_OK);
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| 79 | }
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| 80 | RETURN(E_BAD_ARGUMENT);
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| 81 | }
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| 82 |
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| 83 | /*---------------------------------------------------------------------------
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| 84 | | Facility : libnform
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| 85 | | Function : void *field_arg(const FIELD *field)
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| 86 | |
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| 87 | | Description : Retrieve pointer to the fields argument structure.
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| 88 | |
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| 89 | | Return Values : Pointer to structure or NULL if none is defined.
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| 90 | +--------------------------------------------------------------------------*/
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| 91 | NCURSES_EXPORT(void *)
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| 92 | field_arg(const FIELD *field)
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| 93 | {
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| 94 | T((T_CALLED("field_arg(%p)"), (const void *)field));
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| 95 | returnVoidPtr(Normalize_Field(field)->arg);
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| 96 | }
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| 97 |
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| 98 | /* fld_arg.c ends here */
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