2 * Copyright (c) 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
3 * Redistribution and modifications are permitted subject to BSD license.
5 #ifndef _XER_DECODER_H_
6 #define _XER_DECODER_H_
8 #include <asn_application.h>
14 struct asn_TYPE_descriptor_s; /* Forward declaration */
17 * The XER decoder of any ASN.1 type. May be invoked by the application.
19 asn_dec_rval_t xer_decode(struct asn_codec_ctx_s *opt_codec_ctx,
20 struct asn_TYPE_descriptor_s *type_descriptor,
21 void **struct_ptr, /* Pointer to a target structure's pointer */
22 const void *buffer, /* Data to be decoded */
23 size_t size /* Size of data buffer */
27 * Type of the type-specific XER decoder function.
29 typedef asn_dec_rval_t (xer_type_decoder_f)(asn_codec_ctx_t *opt_codec_ctx,
30 struct asn_TYPE_descriptor_s *type_descriptor,
32 const char *opt_mname, /* Member name */
33 const void *buf_ptr, size_t size
36 /*******************************
37 * INTERNALLY USEFUL FUNCTIONS *
38 *******************************/
41 * Generalized function for decoding the primitive values.
42 * Used by more specialized functions, such as OCTET_STRING_decode_xer_utf8
43 * and others. This function should not be used by applications, as its API
44 * is subject to changes.
46 asn_dec_rval_t xer_decode_general(asn_codec_ctx_t *opt_codec_ctx,
47 asn_struct_ctx_t *ctx, /* Type decoder context */
48 void *struct_key, /* Treated as opaque pointer */
49 const char *xml_tag, /* Expected XML tag name */
50 const void *buf_ptr, size_t size,
51 int (*opt_unexpected_tag_decoder)
52 (void *struct_key, const void *chunk_buf, size_t chunk_size),
53 ssize_t (*body_receiver)
54 (void *struct_key, const void *chunk_buf, size_t chunk_size,
60 * Fetch the next XER (XML) token from the stream.
61 * The function returns the number of bytes occupied by the chunk type,
62 * returned in the _ch_type. The _ch_type is only set (and valid) when
63 * the return value is greater than 0.
65 typedef enum pxer_chunk_type {
66 PXER_TAG, /* Complete XER tag */
67 PXER_TEXT, /* Plain text between XER tags */
68 PXER_COMMENT /* A comment, may be part of */
70 ssize_t xer_next_token(int *stateContext,
71 const void *buffer, size_t size, pxer_chunk_type_e *_ch_type);
74 * This function checks the buffer against the tag name is expected to occur.
76 typedef enum xer_check_tag {
77 XCT_BROKEN = 0, /* The tag is broken */
78 XCT_OPENING = 1, /* This is the <opening> tag */
79 XCT_CLOSING = 2, /* This is the </closing> tag */
80 XCT_BOTH = 3, /* This is the <modified/> tag */
81 XCT__UNK__MASK = 4, /* Mask of everything unexpected */
82 XCT_UNKNOWN_OP = 5, /* Unexpected <opening> tag */
83 XCT_UNKNOWN_CL = 6, /* Unexpected </closing> tag */
84 XCT_UNKNOWN_BO = 7 /* Unexpected <modified/> tag */
86 xer_check_tag_e xer_check_tag(const void *buf_ptr, int size,
87 const char *need_tag);
90 * Check whether this buffer consists of entirely XER whitespace characters.
92 * 1: Whitespace or empty string
95 int xer_is_whitespace(const void *chunk_buf, size_t chunk_size);
98 * Skip the series of anticipated extensions.
100 int xer_skip_unknown(xer_check_tag_e tcv, ber_tlv_len_t *depth);
106 #endif /* _XER_DECODER_H_ */