Annotation of embedaddon/mpd/src/contrib/libpdel/structs/type/union.h, revision 1.1.1.1
1.1 misho 1:
2: /*
3: * Copyright (c) 2001-2002 Packet Design, LLC.
4: * All rights reserved.
5: *
6: * Subject to the following obligations and disclaimer of warranty,
7: * use and redistribution of this software, in source or object code
8: * forms, with or without modifications are expressly permitted by
9: * Packet Design; provided, however, that:
10: *
11: * (i) Any and all reproductions of the source or object code
12: * must include the copyright notice above and the following
13: * disclaimer of warranties; and
14: * (ii) No rights are granted, in any manner or form, to use
15: * Packet Design trademarks, including the mark "PACKET DESIGN"
16: * on advertising, endorsements, or otherwise except as such
17: * appears in the above copyright notice or in the software.
18: *
19: * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
20: * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
21: * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
22: * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
23: * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
24: * OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
25: * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
26: * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
27: * RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
28: * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
29: * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
30: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
31: * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
32: * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
33: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
35: * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
36: * THE POSSIBILITY OF SUCH DAMAGE.
37: *
38: * Author: Archie Cobbs <archie@freebsd.org>
39: */
40:
41: #ifndef _PDEL_STRUCTS_TYPE_UNION_H_
42: #define _PDEL_STRUCTS_TYPE_UNION_H_
43:
44: /*********************************************************************
45: UNION TYPES
46: *********************************************************************/
47:
48: /*
49: * Union type.
50: *
51: * The data must be a 'struct structs_union', or a structure
52: * defined using the DEFINE_STRUCTS_UNION() macro.
53: */
54: struct structs_union {
55: #ifdef __cplusplus
56: const char *field_name; /* name of field in use */
57: #else
58: const char *const field_name; /* name of field in use */
59: #endif
60: void *un; /* pointer to field contents */
61: };
62:
63: /*
64: * Use this to get the 'un' field declared having the correct type.
65: */
66: #ifdef __cplusplus
67: #define DEFINE_STRUCTS_UNION(sname, uname) \
68: struct sname { \
69: const char *field_name; /* name of field in use */ \
70: union uname *un; /* pointer to the field */ \
71: }
72: #else
73: #define DEFINE_STRUCTS_UNION(sname, uname) \
74: struct sname { \
75: const char *const field_name; /* name of field in use */ \
76: union uname *un; /* pointer to the field */ \
77: }
78: #endif
79:
80: /* This structure describes one field in a union */
81: struct structs_ufield {
82: const char *name; /* name of field */
83: const struct structs_type *type; /* type of field */
84: char *dummy; /* for type checking */
85: };
86:
87: /* Use this macro to initialize a 'struct structs_ufield' */
88: #define STRUCTS_UNION_FIELD(fname, ftype) \
89: { #fname, ftype, NULL }
90:
91: /* This macro terminates a list of 'struct structs_ufield' structures */
92: #define STRUCTS_UNION_FIELD_END { NULL, NULL, NULL }
93:
94: __BEGIN_DECLS
95:
96: /*
97: * Union type
98: *
99: * Type-specific arguments:
100: * [const struct structs_ufield *] List of union fields, terminated
101: * by entry with name == NULL.
102: * [const char *] Memory allocation type for "un"
103: */
104: extern structs_init_t structs_union_init;
105: extern structs_copy_t structs_union_copy;
106: extern structs_equal_t structs_union_equal;
107: extern structs_encode_t structs_union_encode;
108: extern structs_decode_t structs_union_decode;
109: extern structs_uninit_t structs_union_free;
110:
111: #define STRUCTS_UNION_TYPE(uname, flist) { \
112: sizeof(struct structs_union), \
113: "union", \
114: STRUCTS_TYPE_UNION, \
115: structs_union_init, \
116: structs_union_copy, \
117: structs_union_equal, \
118: structs_notsupp_ascify, \
119: structs_notsupp_binify, \
120: structs_union_encode, \
121: structs_union_decode, \
122: structs_union_free, \
123: { { (void *)(flist) }, { (void *)("union " #uname) }, { NULL } }\
124: }
125:
126: /* Functions */
127: extern int structs_union_set(const struct structs_type *type,
128: const char *name, void *data, const char *field_name);
129:
130: __END_DECLS
131:
132: #endif /* _PDEL_STRUCTS_TYPE_UNION_H_ */
133:
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