diff options
Diffstat (limited to 'src/ecbor.c')
| -rw-r--r-- | src/ecbor.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/src/ecbor.c b/src/ecbor.c index 11984a6..882f729 100644 --- a/src/ecbor.c +++ b/src/ecbor.c @@ -6,3 +6,221 @@ */ #include "ecbor.h" + +extern ecbor_major_type_t +ecbor_get_type (ecbor_item_t *item) +{ + if (!item) { + return ECBOR_MT_UNDEFINED; + } + if (item->major_type < ECBOR_MT_UINT + || item->major_type > ECBOR_MT_SPECIAL) { + return ECBOR_MT_UNDEFINED; + } + return item->major_type; +} + +extern ecbor_error_t +ecbor_get_value (ecbor_item_t *item, void *value) +{ + if (!item) { + return ECBOR_ERR_NULL_ITEM; + } + if (!value) { + return ECBOR_ERR_NULL_VALUE; + } + + switch (item->major_type) { + case ECBOR_MT_NINT: + *((int64_t *)value) = item->value.integer; + break; + + case ECBOR_MT_UINT: + *((uint64_t *)value) = item->value.uinteger; + break; + + case ECBOR_MT_BSTR: + case ECBOR_MT_STR: + *((uint8_t **)value) = (uint8_t *) item->value.string; + break; + + case ECBOR_MT_TAG: + *((uint64_t *)value) = item->value.tag.tag_value; + break; + + default: + return ECBOR_ERR_INVALID_TYPE; + } + + return ECBOR_OK; +} + +extern ecbor_error_t +ecbor_get_length (ecbor_item_t *item, uint64_t *length) +{ + if (!item) { + return ECBOR_ERR_NULL_ITEM; + } + if (!length) { + return ECBOR_ERR_NULL_VALUE; + } + + switch (item->major_type) { + case ECBOR_MT_BSTR: + case ECBOR_MT_STR: + *length = item->size; + break; + + case ECBOR_MT_ARRAY: + *length = item->n_chunks; + break; + + case ECBOR_MT_MAP: + *length = item->n_chunks / 2; + break; + + default: + return ECBOR_ERR_INVALID_TYPE; + } + + return ECBOR_OK; +} + +extern ecbor_error_t +ecbor_get_array_item (ecbor_item_t *array, uint64_t index, + ecbor_item_t *item) +{ + ecbor_decode_context_t context; + ecbor_error_t rc; + uint64_t i; + + if (!array) { + return ECBOR_ERR_NULL_ARRAY; + } + if (array->major_type != ECBOR_MT_ARRAY) { + return ECBOR_ERR_INVALID_TYPE; + } + if (array->n_chunks <= index) { + return ECBOR_ERR_INDEX_OUT_OF_BOUNDS; + } + if (!item) { + return ECBOR_ERR_NULL_ITEM; + } + + rc = ecbor_initialize_decode (&context, array->value.items, array->size); + if (rc != ECBOR_OK) { + return rc; + } + + for (i = 0; i < index; i ++) { + rc = ecbor_decode (&context, item); + if (rc != ECBOR_OK) { + if (rc == ECBOR_END_OF_BUFFER) { + return ECBOR_ERR_INVALID_END_OF_BUFFER; + } else { + return rc; + } + } + } + + return ECBOR_OK; +} + +extern ecbor_error_t +ecbor_get_map_item (ecbor_item_t *map, uint64_t index, ecbor_item_t *key, + ecbor_item_t *value) +{ + ecbor_decode_context_t context; + ecbor_error_t rc; + uint64_t i; + + if (!map) { + return ECBOR_ERR_NULL_MAP; + } + if (map->major_type != ECBOR_MT_ARRAY) { + return ECBOR_ERR_INVALID_TYPE; + } + if (map->n_chunks <= (index * 2)) { + return ECBOR_ERR_INDEX_OUT_OF_BOUNDS; + } + if (!key || !value) { + return ECBOR_ERR_NULL_ITEM; + } + + rc = ecbor_initialize_decode (&context, map->value.items, map->size); + if (rc != ECBOR_OK) { + return rc; + } + + for (i = 0; i < index; i ++) { + rc = ecbor_decode (&context, key); + if (rc != ECBOR_OK) { + if (rc == ECBOR_END_OF_BUFFER) { + return ECBOR_ERR_INVALID_END_OF_BUFFER; + } else { + return rc; + } + } + + rc = ecbor_decode (&context, value); + if (rc != ECBOR_OK) { + if (rc == ECBOR_END_OF_BUFFER) { + return ECBOR_ERR_INVALID_END_OF_BUFFER; + } else { + return rc; + } + } + } + + return ECBOR_OK; +} + +extern ecbor_error_t +ecbor_get_tag_item (ecbor_item_t *tag, ecbor_item_t *item) +{ + ecbor_decode_context_t context; + ecbor_error_t rc; + + if (!tag) { + return ECBOR_ERR_NULL_ITEM; + } + if (tag->major_type != ECBOR_MT_ARRAY) { + return ECBOR_ERR_INVALID_TYPE; + } + if (!item) { + return ECBOR_ERR_NULL_VALUE; + } + + rc = ecbor_initialize_decode (&context, tag->value.items, tag->size); + if (rc != ECBOR_OK) { + return rc; + } + + rc = ecbor_decode (&context, item); + if (rc != ECBOR_OK) { + if (rc == ECBOR_END_OF_BUFFER) { + return ECBOR_ERR_INVALID_END_OF_BUFFER; + } else { + return rc; + } + } + + return ECBOR_OK; +} + +extern ecbor_error_t +ecbor_get_root (ecbor_decode_context_t *context, ecbor_node_t **root) +{ + if (!context) { + return ECBOR_ERR_NULL_CONTEXT; + } + if (!root) { + return ECBOR_ERR_NULL_NODE; + } + if (context->n_nodes <= 0) { + return ECBOR_ERR_EMPTY_NODE_BUFFER; + } + + *root = &context->nodes[0]; + return ECBOR_OK; +}
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