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#include "cbor_decoder.hpp"
#include <cstdint>
#include "esp-idf/components/cbor/tinycbor/src/cbor.h"
#include "include/cbor_decoder.hpp"
namespace cbor {
static auto ArrayDecoder::Create(uint8_t* buffer, size_t buffer_len)
-> cpp::result<std::unique_ptr<ArrayDecoder>, CborError> {
auto decoder = std::make_unique<ArrayDecoder>();
cbor_parser_init(buffer, buffer_len, &decoder->parser_, &decoder->root_);
if (!cbor_value_is_array(&decoder->root_)) {
return cpp::fail(CborErrorIllegalType);
}
CborError err = cbor_value_enter_container(&decoder->root_, &decoder->it_);
if (err != CborNoError) {
return cpp::fail(err);
}
return std::move(decoder);
}
static auto ArrayDecoder::Create(CborValue& root)
-> cpp::result<std::unique_ptr<ArrayDecoder>, CborError> {
auto decoder = std::make_unique<ArrayDecoder>();
decoder->root_ = root;
if (!cbor_value_is_array(&decoder->root_)) {
return cpp::fail(CborErrorIllegalType);
}
CborError err = cbor_value_enter_container(&decoder->root_, &decoder->it_);
if (err != CborNoError) {
return cpp::fail(err);
}
return std::move(decoder);
}
static auto MapDecoder::Create(uint8_t* buffer, size_t buffer_len)
-> cpp::result<std::unique_ptr<MapDecoder>, CborError> {
auto decoder = std::make_unique<MapDecoder>();
cbor_parser_init(buffer, buffer_len, &decoder->parser_, &decoder->root_);
if (!cbor_value_is_map(&decoder->root_)) {
return cpp::fail(CborErrorIllegalType);
}
CborError err = cbor_value_enter_container(&decoder->root_, &decoder->it_);
if (err != CborNoError) {
return cpp::fail(err);
}
return std::move(decoder);
}
static auto MapDecoder::Create(CborValue& root)
-> cpp::result<std::unique_ptr<MapDecoder>, CborError> {
auto decoder = std::make_unique<MapDecoder>();
decoder->root_ = root;
if (!cbor_value_is_map(&decoder->root_)) {
return cpp::fail(CborErrorIllegalType);
}
CborError err = cbor_value_enter_container(&decoder->root_, &decoder->it_);
if (err != CborNoError) {
return cpp::fail(err);
}
return std::move(decoder);
}
auto MapDecoder::FindString(const std::string& key)
-> std::optional<std::string> {
CborValue val;
if (error_ != CborNoError) {
return {};
}
if (cbor_value_map_find_value(&it_, key.c_str(), &val) != CborNoError) {
return {};
}
if (!cbor_value_is_byte_string(&val)) {
error_ = CborErrorIllegalType;
return {};
}
uint8_t* buf;
size_t len;
error_ = cbor_value_dup_byte_string(&val, &buf, &len, NULL);
if (error_ != CborNoError) {
return cpp::fail(error_);
}
std::string ret(buf, len);
free(buf);
return ret;
}
auto MapDecoder::FindUnsigned(const std::string& key)
-> std::optional<uint32_t> {
CborValue val;
if (error_ != CborNoError) {
return {};
}
if (cbor_value_map_find_value(&it_, key.c_str(), &val) != CborNoError) {
return {};
}
if (!cbor_value_is_unsigned_integer(&val)) {
error_ = CborErrorIllegalType;
return {};
}
uint64_t ret;
error_ = cbor_value_get_uint64(&val, &ret);
if (error_ != CborNoError) {
return cpp::fail(error_);
}
return ret;
}
auto MapDecoder::FindSigned(const std::string& key) -> std::optional<int32_t> {
CborValue val;
if (error_ != CborNoError) {
return {};
}
if (cbor_value_map_find_value(&it_, key.c_str(), &val) != CborNoError) {
// Don't store this as an error; missing keys are fine.
return {};
}
if (!cbor_value_is_integer(&val)) {
error_ = CborErrorIllegalType;
return {};
}
int32_t ret;
error_ = cbor_value_get_int(&val, &ret);
if (error_ != CborNoError) {
return cpp::fail(error_);
}
return ret;
}
} // namespace cbor
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