File:
[ELWIX - Embedded LightWeight unIX -] /
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src /
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libpdel /
structs /
type /
union.h
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1.1.1.1 (vendor branch):
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Mon Jul 22 08:44:30 2013 UTC (11 years, 1 month ago) by
misho
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MAIN
CVS tags:
v5_9p16,
v5_9,
v5_8p7,
v5_8p1_cross,
v5_8p1,
v5_8,
v5_7p0,
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5.7
/*
* Copyright (c) 2001-2002 Packet Design, LLC.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty,
* use and redistribution of this software, in source or object code
* forms, with or without modifications are expressly permitted by
* Packet Design; provided, however, that:
*
* (i) Any and all reproductions of the source or object code
* must include the copyright notice above and the following
* disclaimer of warranties; and
* (ii) No rights are granted, in any manner or form, to use
* Packet Design trademarks, including the mark "PACKET DESIGN"
* on advertising, endorsements, or otherwise except as such
* appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
* THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
* OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
* OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
* OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
* RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
* LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
* OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
* DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
* USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* Author: Archie Cobbs <archie@freebsd.org>
*/
#ifndef _PDEL_STRUCTS_TYPE_UNION_H_
#define _PDEL_STRUCTS_TYPE_UNION_H_
/*********************************************************************
UNION TYPES
*********************************************************************/
/*
* Union type.
*
* The data must be a 'struct structs_union', or a structure
* defined using the DEFINE_STRUCTS_UNION() macro.
*/
struct structs_union {
#ifdef __cplusplus
const char *field_name; /* name of field in use */
#else
const char *const field_name; /* name of field in use */
#endif
void *un; /* pointer to field contents */
};
/*
* Use this to get the 'un' field declared having the correct type.
*/
#ifdef __cplusplus
#define DEFINE_STRUCTS_UNION(sname, uname) \
struct sname { \
const char *field_name; /* name of field in use */ \
union uname *un; /* pointer to the field */ \
}
#else
#define DEFINE_STRUCTS_UNION(sname, uname) \
struct sname { \
const char *const field_name; /* name of field in use */ \
union uname *un; /* pointer to the field */ \
}
#endif
/* This structure describes one field in a union */
struct structs_ufield {
const char *name; /* name of field */
const struct structs_type *type; /* type of field */
char *dummy; /* for type checking */
};
/* Use this macro to initialize a 'struct structs_ufield' */
#define STRUCTS_UNION_FIELD(fname, ftype) \
{ #fname, ftype, NULL }
/* This macro terminates a list of 'struct structs_ufield' structures */
#define STRUCTS_UNION_FIELD_END { NULL, NULL, NULL }
__BEGIN_DECLS
/*
* Union type
*
* Type-specific arguments:
* [const struct structs_ufield *] List of union fields, terminated
* by entry with name == NULL.
* [const char *] Memory allocation type for "un"
*/
extern structs_init_t structs_union_init;
extern structs_copy_t structs_union_copy;
extern structs_equal_t structs_union_equal;
extern structs_encode_t structs_union_encode;
extern structs_decode_t structs_union_decode;
extern structs_uninit_t structs_union_free;
#define STRUCTS_UNION_TYPE(uname, flist) { \
sizeof(struct structs_union), \
"union", \
STRUCTS_TYPE_UNION, \
structs_union_init, \
structs_union_copy, \
structs_union_equal, \
structs_notsupp_ascify, \
structs_notsupp_binify, \
structs_union_encode, \
structs_union_decode, \
structs_union_free, \
{ { (void *)(flist) }, { (void *)("union " #uname) }, { NULL } }\
}
/* Functions */
extern int structs_union_set(const struct structs_type *type,
const char *name, void *data, const char *field_name);
__END_DECLS
#endif /* _PDEL_STRUCTS_TYPE_UNION_H_ */
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