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[stg.git] / libs / smux / include / stg / oer_encoder.h
1 /*
2  * Copyright (c) 2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
3  * Redistribution and modifications are permitted subject to BSD license.
4  */
5 #ifndef OER_ENCODER_H
6 #define OER_ENCODER_H
7
8 #include <asn_application.h>
9
10 #ifdef __cplusplus
11 extern "C" {
12 #endif
13
14 struct asn_TYPE_descriptor_s;   /* Forward declaration */
15
16 /*
17  * The Octet Encoding Rules (OER, X.696 08/2015) encoder for any type.
18  * This function may be invoked directly by the application.
19  * Produces CANONICAL-OER output compatible with CANONICAL-OER
20  * and BASIC-OER decoders.
21  */
22 asn_enc_rval_t oer_encode(const struct asn_TYPE_descriptor_s *type_descriptor,
23                           const void *struct_ptr, /* Structure to be encoded */
24                           asn_app_consume_bytes_f *consume_bytes_cb,
25                           void *app_key /* Arbitrary callback argument */
26 );
27
28 /* A variant of oer_encode() which encodes data into the pre-allocated buffer */
29 asn_enc_rval_t oer_encode_to_buffer(
30     const struct asn_TYPE_descriptor_s *type_descriptor,
31     const asn_oer_constraints_t *constraints,
32     const void *struct_ptr, /* Structure to be encoded */
33     void *buffer,           /* Pre-allocated buffer */
34     size_t buffer_size      /* Initial buffer size (maximum) */
35 );
36
37 /*
38  * Type of the generic OER encoder.
39  */
40 typedef asn_enc_rval_t(oer_type_encoder_f)(
41     const struct asn_TYPE_descriptor_s *type_descriptor,
42     const asn_oer_constraints_t *constraints,
43     const void *struct_ptr,                    /* Structure to be encoded */
44     asn_app_consume_bytes_f *consume_bytes_cb, /* Callback */
45     void *app_key                              /* Arbitrary callback argument */
46 );
47
48 /*
49  * Write out the Open Type (X.696 (08/2015), #30).
50  * RETURN VALUES:
51  *  -1: Fatal error encoding the type.
52  *  >0: Number of bytes serialized.
53  */
54 ssize_t oer_open_type_put(const struct asn_TYPE_descriptor_s *td,
55                           const asn_oer_constraints_t *constraints,
56                           const void *struct_ptr,
57                           asn_app_consume_bytes_f *consume_bytes_cb,
58                           void *app_key);
59
60
61 /*
62  * Length-prefixed buffer encoding for primitive types.
63  */
64 oer_type_encoder_f oer_encode_primitive;
65
66 #ifdef __cplusplus
67 }
68 #endif
69
70 #endif  /* OER_ENCODER_H */