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/*
* Copyright (c) 2018 Vasile Vilvoiu <vasi.vilvoiu@gmail.com>
*
* libecbor is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#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:
if (item->is_indefinite) {
return ECBOR_ERR_WONT_RETURN_INDEFINITE;
}
*((uint8_t **)value) = (uint8_t *) item->value.string.str;
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:
case ECBOR_MT_ARRAY:
*length = item->length;
break;
case ECBOR_MT_MAP:
*length = item->length / 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->length <= 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_MAP) {
return ECBOR_ERR_INVALID_TYPE;
}
if (map->length <= (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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