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/*-
* Copyright (c) 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
* Redistribution and modifications are permitted subject to BSD license.
*/
#ifndef _ASN1_CONSTRAINTS_VALIDATOR_H_
#define _ASN1_CONSTRAINTS_VALIDATOR_H_
#include <asn_types.h> /* System-dependent types */
struct asn1_TYPE_descriptor_s; /* Forward declaration */
/*
* Validate the structure according to the ASN.1 constraints.
* If errbuf and errlen are given, they shall be pointing to the appropriate
* buffer space and its length before calling this function. Alternatively,
* they could be passed as NULL's. If constraints validation fails,
* errlen will contain the actual number of bytes taken from the errbuf
* to encode an error message (properly 0-terminated).
*/
int
asn_check_constraints(struct asn1_TYPE_descriptor_s *type_descriptor,
const void *struct_ptr, /* Target language's structure */
char *errbuf, /* Returned error description */
size_t *errlen /* Length of the error description */
);
/*
* Generic type for constraint checking callback,
* associated with every type descriptor.
*/
typedef int (asn_constr_check_f)(
struct asn1_TYPE_descriptor_s *type_descriptor,
const void *struct_ptr,
asn_app_consume_bytes_f *optional_app_errlog, /* Log the error */
void *optional_app_key /* Opaque key passed to app_errlog */
);
/*******************************
* INTERNALLY USEFUL FUNCTIONS *
*******************************/
asn_constr_check_f asn_generic_no_constraint; /* No constraint whatsoever */
asn_constr_check_f asn_generic_unknown_constraint; /* Not fully supported */
/*
* Invoke the callback with a complete error message.
*/
#define _ASN_ERRLOG(fmt, args...) do { \
if(app_errlog) \
_asn_i_log_error(app_errlog, \
app_key, fmt, ##args); \
break; \
} while(0);
void _asn_i_log_error(asn_app_consume_bytes_f *, void *key,
const char *fmt, ...) __attribute__ ((format(printf, 3, 4)));
#endif /* _ASN1_CONSTRAINTS_VALIDATOR_H_ */
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