108 lines
3.5 KiB
C
108 lines
3.5 KiB
C
|
|
||
|
|
/*-
|
||
|
|
* Copyright (c) 2004-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
|
||
|
|
* Redistribution and modifications are permitted subject to BSD license.
|
||
|
|
*/
|
||
|
|
#ifndef _XER_DECODER_H_
|
||
|
|
#define _XER_DECODER_H_
|
||
|
|
|
||
|
|
#include <asn_application.h>
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
struct asn_TYPE_descriptor_s; /* Forward declaration */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The XER decoder of any ASN.1 type. May be invoked by the application.
|
||
|
|
* Decodes CANONICAL-XER and BASIC-XER.
|
||
|
|
*/
|
||
|
|
asn_dec_rval_t xer_decode(
|
||
|
|
const struct asn_codec_ctx_s *opt_codec_ctx,
|
||
|
|
const struct asn_TYPE_descriptor_s *type_descriptor,
|
||
|
|
void **struct_ptr, /* Pointer to a target structure's pointer */
|
||
|
|
const void *buffer, /* Data to be decoded */
|
||
|
|
size_t size /* Size of data buffer */
|
||
|
|
);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Type of the type-specific XER decoder function.
|
||
|
|
*/
|
||
|
|
typedef asn_dec_rval_t(xer_type_decoder_f)(
|
||
|
|
const asn_codec_ctx_t *opt_codec_ctx,
|
||
|
|
const struct asn_TYPE_descriptor_s *type_descriptor, void **struct_ptr,
|
||
|
|
const char *opt_mname, /* Member name */
|
||
|
|
const void *buf_ptr, size_t size);
|
||
|
|
|
||
|
|
/*******************************
|
||
|
|
* INTERNALLY USEFUL FUNCTIONS *
|
||
|
|
*******************************/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Generalized function for decoding the primitive values.
|
||
|
|
* Used by more specialized functions, such as OCTET_STRING_decode_xer_utf8
|
||
|
|
* and others. This function should not be used by applications, as its API
|
||
|
|
* is subject to changes.
|
||
|
|
*/
|
||
|
|
asn_dec_rval_t xer_decode_general(
|
||
|
|
const asn_codec_ctx_t *opt_codec_ctx,
|
||
|
|
asn_struct_ctx_t *ctx, /* Type decoder context */
|
||
|
|
void *struct_key, /* Treated as opaque pointer */
|
||
|
|
const char *xml_tag, /* Expected XML tag name */
|
||
|
|
const void *buf_ptr, size_t size,
|
||
|
|
int (*opt_unexpected_tag_decoder)(void *struct_key, const void *chunk_buf,
|
||
|
|
size_t chunk_size),
|
||
|
|
ssize_t (*body_receiver)(void *struct_key, const void *chunk_buf,
|
||
|
|
size_t chunk_size, int have_more));
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Fetch the next XER (XML) token from the stream.
|
||
|
|
* The function returns the number of bytes occupied by the chunk type,
|
||
|
|
* returned in the _ch_type. The _ch_type is only set (and valid) when
|
||
|
|
* the return value is >= 0.
|
||
|
|
*/
|
||
|
|
typedef enum pxer_chunk_type {
|
||
|
|
PXER_WMORE, /* Chunk type is not clear, more data expected. */
|
||
|
|
PXER_TAG, /* Complete XER tag */
|
||
|
|
PXER_TEXT, /* Plain text between XER tags */
|
||
|
|
PXER_COMMENT /* A comment, may be part of */
|
||
|
|
} pxer_chunk_type_e;
|
||
|
|
ssize_t xer_next_token(int *stateContext,
|
||
|
|
const void *buffer, size_t size, pxer_chunk_type_e *_ch_type);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This function checks the buffer against the tag name is expected to occur.
|
||
|
|
*/
|
||
|
|
typedef enum xer_check_tag {
|
||
|
|
XCT_BROKEN = 0, /* The tag is broken */
|
||
|
|
XCT_OPENING = 1, /* This is the <opening> tag */
|
||
|
|
XCT_CLOSING = 2, /* This is the </closing> tag */
|
||
|
|
XCT_BOTH = 3, /* This is the <modified/> tag */
|
||
|
|
XCT__UNK__MASK = 4, /* Mask of everything unexpected */
|
||
|
|
XCT_UNKNOWN_OP = 5, /* Unexpected <opening> tag */
|
||
|
|
XCT_UNKNOWN_CL = 6, /* Unexpected </closing> tag */
|
||
|
|
XCT_UNKNOWN_BO = 7 /* Unexpected <modified/> tag */
|
||
|
|
} xer_check_tag_e;
|
||
|
|
xer_check_tag_e xer_check_tag(const void *buf_ptr, int size,
|
||
|
|
const char *need_tag);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Get the number of bytes consisting entirely of XER whitespace characters.
|
||
|
|
* RETURN VALUES:
|
||
|
|
* >=0: Number of whitespace characters in the string.
|
||
|
|
*/
|
||
|
|
size_t xer_whitespace_span(const void *chunk_buf, size_t chunk_size);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Skip the series of anticipated extensions.
|
||
|
|
*/
|
||
|
|
int xer_skip_unknown(xer_check_tag_e tcv, ber_tlv_len_t *depth);
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _XER_DECODER_H_ */
|