Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| 3 | * Redistribution and modifications are permitted subject to BSD license. |
| 4 | */ |
| 5 | #ifndef _BER_DECODER_H_ |
| 6 | #define _BER_DECODER_H_ |
| 7 | |
Lev Walkin | 11c3e17 | 2004-09-24 21:00:50 +0000 | [diff] [blame] | 8 | #include <asn_application.h> |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 9 | |
Lev Walkin | 1cbd222 | 2004-09-29 13:24:10 +0000 | [diff] [blame] | 10 | struct asn_TYPE_descriptor_s; /* Forward declaration */ |
| 11 | struct asn_codec_ctx_s; /* Forward declaration */ |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 12 | |
| 13 | /* |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 14 | * The BER decoder of any type. |
| 15 | * This function may be invoked directly from the application. |
| 16 | */ |
Lev Walkin | dc06f6b | 2004-10-20 15:50:55 +0000 | [diff] [blame] | 17 | asn_dec_rval_t ber_decode(struct asn_codec_ctx_s *opt_codec_ctx, |
Lev Walkin | 1cbd222 | 2004-09-29 13:24:10 +0000 | [diff] [blame] | 18 | struct asn_TYPE_descriptor_s *type_descriptor, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 19 | void **struct_ptr, /* Pointer to a target structure's pointer */ |
| 20 | void *buffer, /* Data to be decoded */ |
| 21 | size_t size /* Size of that buffer */ |
| 22 | ); |
| 23 | |
| 24 | /* |
| 25 | * Type of generic function which decodes the byte stream into the structure. |
| 26 | */ |
Lev Walkin | dc06f6b | 2004-10-20 15:50:55 +0000 | [diff] [blame] | 27 | typedef asn_dec_rval_t (ber_type_decoder_f)( |
Lev Walkin | 1cbd222 | 2004-09-29 13:24:10 +0000 | [diff] [blame] | 28 | struct asn_codec_ctx_s *opt_codec_ctx, |
| 29 | struct asn_TYPE_descriptor_s *type_descriptor, |
Lev Walkin | dc06f6b | 2004-10-20 15:50:55 +0000 | [diff] [blame] | 30 | void **struct_ptr, void *buf_ptr, size_t size, |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 31 | int tag_mode); |
| 32 | |
| 33 | /******************************* |
| 34 | * INTERNALLY USEFUL FUNCTIONS * |
| 35 | *******************************/ |
| 36 | |
| 37 | /* |
| 38 | * Check that all tags correspond to the type definition (as given in head). |
| 39 | * On return, last_length would contain either a non-negative length of the |
| 40 | * value part of the last TLV, or the negative number of expected |
| 41 | * "end of content" sequences. The number may only be negative if the |
| 42 | * head->last_tag_form is non-zero. |
| 43 | */ |
Lev Walkin | dc06f6b | 2004-10-20 15:50:55 +0000 | [diff] [blame] | 44 | asn_dec_rval_t ber_check_tags( |
Lev Walkin | 1cbd222 | 2004-09-29 13:24:10 +0000 | [diff] [blame] | 45 | struct asn_codec_ctx_s *opt_codec_ctx, /* optional context */ |
| 46 | struct asn_TYPE_descriptor_s *type_dsc, |
| 47 | asn_struct_ctx_t *opt_ctx, /* saved decoding context */ |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 48 | void *ptr, size_t size, |
| 49 | int tag_mode, /* {-1,0,1}: IMPLICIT, no, EXPLICIT */ |
Lev Walkin | 8e8078a | 2004-09-26 13:10:40 +0000 | [diff] [blame] | 50 | int last_tag_form, /* {-1,0:1}: any, primitive, constr */ |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 51 | ber_tlv_len_t *last_length, |
Lev Walkin | 1cbd222 | 2004-09-29 13:24:10 +0000 | [diff] [blame] | 52 | int *opt_tlv_form /* optional tag form */ |
| 53 | ); |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 54 | |
| 55 | #endif /* _BER_DECODER_H_ */ |