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/*-
* Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
* Redistribution and modifications are permitted subject to BSD license.
*/
#ifndef _CONSTR_TYPE_H_
#define _CONSTR_TYPE_H_
#include <asn_types.h> /* System-dependent types */
#include <ber_tlv_length.h>
#include <ber_tlv_tag.h>
#include <ber_decoder.h>
#include <der_encoder.h>
#include <constraints.h>
struct asn1_TYPE_descriptor_s; /* Forward declaration */
/*
* Free the structure according to its specification.
* If (free_contents_only) is set, the wrapper structure itself (struct_ptr)
* will not be freed. (It may be useful in case the structure is allocated
* statically or arranged on the stack, yet its elements are allocated
* dynamically.)
*/
typedef void (asn_struct_free_f)(
struct asn1_TYPE_descriptor_s *type_descriptor,
void *struct_ptr, int free_contents_only);
/*
* Print the structure according to its specification.
*/
typedef int (asn_struct_print_f)(
struct asn1_TYPE_descriptor_s *type_descriptor,
const void *struct_ptr,
int level, /* Indentation level */
asn_app_consume_bytes_f *callback, void *app_key);
/*
* Return the outmost tag of the type.
* If the type is untagged CHOICE, the dynamic operation is performed.
* NOTE: This function pointer type is only useful internally.
* Do not use it in your application.
*/
typedef ber_tlv_tag_t (asn_outmost_tag_f)(
struct asn1_TYPE_descriptor_s *type_descriptor,
const void *struct_ptr, int tag_mode, ber_tlv_tag_t tag);
/* The instance of the above function type */
asn_outmost_tag_f asn1_TYPE_outmost_tag;
/*
* The definitive description of the destination language's structure.
*/
typedef struct asn1_TYPE_descriptor_s {
char *name; /* A name of the ASN.1 type */
/*
* Generalized functions for dealing with the specific type.
* May be directly invoked by applications.
*/
asn_constr_check_f *check_constraints; /* Constraints validator */
ber_type_decoder_f *ber_decoder; /* Free-form BER decoder */
der_type_encoder_f *der_encoder; /* Canonical DER encoder */
asn_struct_print_f *print_struct; /* Human readable output */
asn_struct_free_f *free_struct; /* Free the structure */
/*
* Functions used internally. Should not be used by applications.
*/
asn_outmost_tag_f *outmost_tag; /* <optional, internal> */
/*
* Tags that are expected, with some of their vital properties.
*/
ber_tlv_tag_t *tags; /* At least one tag must be specified */
int tags_count; /* Number of tags which are expected */
int tags_impl_skip; /* Tags to skip in implicit mode */
int last_tag_form; /* Acceptable form of the tag (prim, constr) */
/*
* Additional information describing the type, used by appropriate
* functions above.
*/
void *specifics;
} asn1_TYPE_descriptor_t;
/*
* This function is a wrapper around (td)->print_struct, which prints out
* the contents of the target language's structure (struct_ptr) into the
* file pointer (stream) in human readable form.
* RETURN VALUES:
* 0: The structure is printed.
* -1: Problem dumping the structure.
*/
int asn_fprint(FILE *stream, /* Destination stream descriptor */
asn1_TYPE_descriptor_t *td, /* ASN.1 type descriptor */
const void *struct_ptr); /* Structure to be printed */
#endif /* _CONSTR_TYPE_H_ */
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