Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| 3 | * Redistribution and modifications are permitted subject to BSD license. |
| 4 | */ |
| 5 | #include <asn_internal.h> |
| 6 | #include <OPEN_TYPE.h> |
| 7 | #include <constr_CHOICE.h> |
| 8 | #include <per_opentype.h> |
| 9 | #include <errno.h> |
| 10 | |
Bi-Ruei, Chiu | 1f87ac0 | 2017-08-20 01:25:45 +0800 | [diff] [blame] | 11 | asn_TYPE_operation_t asn_OP_OPEN_TYPE = { |
| 12 | OPEN_TYPE_free, |
| 13 | OPEN_TYPE_print, |
| 14 | OPEN_TYPE_compare, |
| 15 | OPEN_TYPE_constraint, |
| 16 | OPEN_TYPE_decode_ber, |
| 17 | OPEN_TYPE_encode_der, |
| 18 | OPEN_TYPE_decode_xer, |
| 19 | OPEN_TYPE_encode_xer, |
| 20 | 0, 0, /* No OER support, use "-gen-OER" to enable */ |
| 21 | OPEN_TYPE_decode_uper, |
| 22 | OPEN_TYPE_encode_uper, |
| 23 | 0, /* Use generic outmost tag fetcher */ |
| 24 | }; |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 25 | |
Lev Walkin | f59dac9 | 2017-08-26 21:26:51 -0700 | [diff] [blame] | 26 | #undef XER_ADVANCE |
| 27 | #define XER_ADVANCE(num_bytes) \ |
| 28 | do { \ |
| 29 | size_t num = num_bytes; \ |
| 30 | ptr = ((const char *)ptr) + num; \ |
| 31 | size -= num; \ |
| 32 | consumed_myself += num; \ |
| 33 | } while(0) |
| 34 | |
| 35 | asn_dec_rval_t |
| 36 | OPEN_TYPE_xer_get(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td, |
| 37 | void *sptr, asn_TYPE_member_t *elm, const void *ptr, |
| 38 | size_t size) { |
| 39 | size_t consumed_myself = 0; |
| 40 | asn_type_selector_result_t selected; |
| 41 | void *memb_ptr; /* Pointer to the member */ |
| 42 | void **memb_ptr2; /* Pointer to that pointer */ |
| 43 | void *inner_value; |
| 44 | const char *xml_tag; |
| 45 | asn_dec_rval_t rv; |
| 46 | |
| 47 | int xer_context = 0; |
| 48 | ssize_t ch_size; |
| 49 | pxer_chunk_type_e ch_type; |
| 50 | |
| 51 | if(!(elm->flags & ATF_OPEN_TYPE) || !elm->type_selector) { |
| 52 | ASN__DECODE_FAILED; |
| 53 | } |
| 54 | |
| 55 | selected = elm->type_selector(td, sptr); |
| 56 | if(!selected.presence_index) { |
| 57 | ASN__DECODE_FAILED; |
| 58 | } |
| 59 | |
| 60 | /* Fetch the pointer to this member */ |
| 61 | assert(elm->flags == ATF_OPEN_TYPE); |
| 62 | if(elm->flags & ATF_POINTER) { |
| 63 | memb_ptr2 = (void **)((char *)sptr + elm->memb_offset); |
| 64 | } else { |
| 65 | memb_ptr = (char *)sptr + elm->memb_offset; |
| 66 | memb_ptr2 = &memb_ptr; |
| 67 | } |
| 68 | if(*memb_ptr2 != NULL) { |
| 69 | /* Make sure we reset the structure first before encoding */ |
| 70 | if(CHOICE_variant_set_presence(elm->type, *memb_ptr2, 0) |
| 71 | != 0) { |
| 72 | ASN__DECODE_FAILED; |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | /* |
| 77 | * Confirm wrapper. |
| 78 | */ |
| 79 | for(;;) { |
| 80 | ch_size = xer_next_token(&xer_context, ptr, size, &ch_type); |
| 81 | if(ch_size <= 0) { |
| 82 | ASN__DECODE_FAILED; |
| 83 | } else { |
| 84 | switch(ch_type) { |
| 85 | case PXER_WMORE: |
| 86 | ASN__DECODE_STARVED; |
| 87 | case PXER_COMMENT: |
| 88 | case PXER_TEXT: |
| 89 | XER_ADVANCE(ch_size); |
| 90 | continue; |
| 91 | case PXER_TAG: |
| 92 | break; |
| 93 | } |
| 94 | break; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | /* |
| 99 | * Wrapper value confirmed. |
| 100 | */ |
| 101 | switch(xer_check_tag(ptr, ch_size, elm->name)) { |
| 102 | case XCT_OPENING: |
| 103 | XER_ADVANCE(ch_size); |
| 104 | break; |
| 105 | case XCT_BROKEN: |
| 106 | default: |
| 107 | ASN__DECODE_FAILED; |
| 108 | } |
| 109 | |
| 110 | inner_value = |
| 111 | (char *)*memb_ptr2 |
| 112 | + elm->type->elements[selected.presence_index - 1].memb_offset; |
| 113 | |
| 114 | rv = selected.type_descriptor->op->xer_decoder( |
| 115 | opt_codec_ctx, selected.type_descriptor, &inner_value, NULL, ptr, size); |
| 116 | XER_ADVANCE(rv.consumed); |
| 117 | rv.consumed = 0; |
| 118 | switch(rv.code) { |
| 119 | case RC_OK: |
| 120 | if(CHOICE_variant_set_presence(elm->type, *memb_ptr2, |
| 121 | selected.presence_index) |
| 122 | == 0) { |
| 123 | break; |
| 124 | } else { |
| 125 | rv.code = RC_FAIL; |
| 126 | } |
| 127 | /* Fall through */ |
| 128 | case RC_FAIL: |
| 129 | /* Point to a best position where failure occurred */ |
| 130 | rv.consumed = consumed_myself; |
| 131 | /* Fall through */ |
| 132 | case RC_WMORE: |
| 133 | /* Wrt. rv.consumed==0: |
| 134 | * In case a genuine RC_WMORE, the whole Open Type decoding |
| 135 | * will have to be restarted. |
| 136 | */ |
| 137 | if(*memb_ptr2) { |
| 138 | asn_CHOICE_specifics_t *specs = selected.type_descriptor->specifics; |
| 139 | if(elm->flags & ATF_POINTER) { |
| 140 | ASN_STRUCT_FREE(*selected.type_descriptor, inner_value); |
| 141 | *memb_ptr2 = NULL; |
| 142 | } else { |
| 143 | ASN_STRUCT_FREE_CONTENTS_ONLY(*selected.type_descriptor, |
| 144 | inner_value); |
| 145 | memset(*memb_ptr2, 0, specs->struct_size); |
| 146 | } |
| 147 | } |
| 148 | return rv; |
| 149 | } |
| 150 | |
| 151 | /* |
| 152 | * Finalize wrapper. |
| 153 | */ |
| 154 | for(;;) { |
| 155 | ch_size = xer_next_token(&xer_context, ptr, size, &ch_type); |
| 156 | if(ch_size <= 0) { |
| 157 | ASN__DECODE_FAILED; |
| 158 | } else { |
| 159 | switch(ch_type) { |
| 160 | case PXER_WMORE: |
| 161 | ASN__DECODE_STARVED; |
| 162 | case PXER_COMMENT: |
| 163 | case PXER_TEXT: |
| 164 | XER_ADVANCE(ch_size); |
| 165 | continue; |
| 166 | case PXER_TAG: |
| 167 | break; |
| 168 | } |
| 169 | break; |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | /* |
| 174 | * Wrapper value confirmed. |
| 175 | */ |
| 176 | switch(xer_check_tag(ptr, ch_size, elm->name)) { |
| 177 | case XCT_CLOSING: |
| 178 | XER_ADVANCE(ch_size); |
| 179 | break; |
| 180 | case XCT_BROKEN: |
| 181 | default: |
| 182 | ASN__DECODE_FAILED; |
| 183 | } |
| 184 | |
| 185 | rv.consumed += consumed_myself; |
| 186 | |
| 187 | return rv; |
| 188 | } |
| 189 | |
| 190 | |
Lev Walkin | 6903380 | 2017-08-25 12:15:58 -0700 | [diff] [blame] | 191 | #ifndef ASN_DISABLE_PER_SUPPORT |
| 192 | |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 193 | asn_dec_rval_t |
| 194 | OPEN_TYPE_uper_get(asn_codec_ctx_t *opt_codec_ctx, |
| 195 | asn_TYPE_descriptor_t *td, void *sptr, |
| 196 | asn_TYPE_member_t *elm, asn_per_data_t *pd) { |
| 197 | asn_type_selector_result_t selected; |
| 198 | void *memb_ptr; /* Pointer to the member */ |
| 199 | void **memb_ptr2; /* Pointer to that pointer */ |
Lev Walkin | f59dac9 | 2017-08-26 21:26:51 -0700 | [diff] [blame] | 200 | void *inner_value; |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 201 | asn_dec_rval_t rv; |
| 202 | |
| 203 | if(!(elm->flags & ATF_OPEN_TYPE) || !elm->type_selector) { |
| 204 | ASN__DECODE_FAILED; |
| 205 | } |
| 206 | |
| 207 | selected = elm->type_selector(td, sptr); |
| 208 | if(!selected.presence_index) { |
| 209 | ASN__DECODE_FAILED; |
| 210 | } |
| 211 | |
| 212 | /* Fetch the pointer to this member */ |
| 213 | assert(elm->flags == ATF_OPEN_TYPE); |
| 214 | if(elm->flags & ATF_POINTER) { |
| 215 | memb_ptr2 = (void **)((char *)sptr + elm->memb_offset); |
| 216 | } else { |
| 217 | memb_ptr = (char *)sptr + elm->memb_offset; |
| 218 | memb_ptr2 = &memb_ptr; |
| 219 | } |
| 220 | if(*memb_ptr2 != NULL) { |
| 221 | /* Make sure we reset the structure first before encoding */ |
| 222 | if(CHOICE_variant_set_presence(elm->type, *memb_ptr2, 0) |
| 223 | != 0) { |
| 224 | ASN__DECODE_FAILED; |
| 225 | } |
| 226 | } |
| 227 | |
Lev Walkin | f59dac9 | 2017-08-26 21:26:51 -0700 | [diff] [blame] | 228 | inner_value = |
Lev Walkin | f6853ce | 2017-08-11 00:50:27 -0700 | [diff] [blame] | 229 | (char *)*memb_ptr2 |
| 230 | + elm->type->elements[selected.presence_index - 1].memb_offset; |
| 231 | |
| 232 | rv = uper_open_type_get(opt_codec_ctx, selected.type_descriptor, NULL, |
| 233 | &inner_value, pd); |
| 234 | switch(rv.code) { |
| 235 | case RC_OK: |
| 236 | if(CHOICE_variant_set_presence(elm->type, *memb_ptr2, |
| 237 | selected.presence_index) |
| 238 | == 0) { |
| 239 | break; |
| 240 | } else { |
| 241 | rv.code = RC_FAIL; |
| 242 | } |
| 243 | /* Fall through */ |
| 244 | case RC_WMORE: |
| 245 | case RC_FAIL: |
| 246 | if(*memb_ptr2) { |
| 247 | asn_CHOICE_specifics_t *specs = selected.type_descriptor->specifics; |
| 248 | if(elm->flags & ATF_POINTER) { |
| 249 | ASN_STRUCT_FREE(*selected.type_descriptor, inner_value); |
| 250 | *memb_ptr2 = NULL; |
| 251 | } else { |
| 252 | ASN_STRUCT_FREE_CONTENTS_ONLY(*selected.type_descriptor, |
| 253 | inner_value); |
| 254 | memset(*memb_ptr2, 0, specs->struct_size); |
| 255 | } |
| 256 | } |
| 257 | } |
| 258 | return rv; |
| 259 | } |
| 260 | |
Lev Walkin | 6903380 | 2017-08-25 12:15:58 -0700 | [diff] [blame] | 261 | #endif /* ASN_DISABLE_PER_SUPPORT */ |