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/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Unlicense OR CC0-1.0
*/
#include <stdio.h>
#include <freertos/FreeRTOS.h>
#include "unity.h"
#if __has_include("esp_random.h")
#include "esp_random.h"
#else
#include "esp_system.h"
#endif
#include "cbor.h"
#define CBOR_CHECK(a, str, goto_tag, ret_value, ...) \
do \
{ \
if ((a) != CborNoError) \
{ \
printf("%s(%d): " str, __FUNCTION__, __LINE__, ##__VA_ARGS__); \
ret = ret_value; \
goto goto_tag; \
} \
} while (0)
static void indent(int nestingLevel)
{
while (nestingLevel--) {
printf(" ");
}
}
static void dumpbytes(const uint8_t *buf, size_t len)
{
while (len--) {
printf("%02X ", *buf++);
}
}
/**
* Decode CBOR data manuallly
*/
static CborError example_dump_cbor_buffer(CborValue *it, int nestingLevel)
{
CborError ret = CborNoError;
while (!cbor_value_at_end(it)) {
CborType type = cbor_value_get_type(it);
indent(nestingLevel);
switch (type) {
case CborArrayType: {
CborValue recursed;
assert(cbor_value_is_container(it));
puts("Array[");
ret = cbor_value_enter_container(it, &recursed);
CBOR_CHECK(ret, "enter container failed", err, ret);
ret = example_dump_cbor_buffer(&recursed, nestingLevel + 1);
CBOR_CHECK(ret, "recursive dump failed", err, ret);
ret = cbor_value_leave_container(it, &recursed);
CBOR_CHECK(ret, "leave container failed", err, ret);
indent(nestingLevel);
puts("]");
continue;
}
case CborMapType: {
CborValue recursed;
assert(cbor_value_is_container(it));
puts("Map{");
ret = cbor_value_enter_container(it, &recursed);
CBOR_CHECK(ret, "enter container failed", err, ret);
ret = example_dump_cbor_buffer(&recursed, nestingLevel + 1);
CBOR_CHECK(ret, "recursive dump failed", err, ret);
ret = cbor_value_leave_container(it, &recursed);
CBOR_CHECK(ret, "leave container failed", err, ret);
indent(nestingLevel);
puts("}");
continue;
}
case CborIntegerType: {
int64_t val;
ret = cbor_value_get_int64(it, &val);
CBOR_CHECK(ret, "parse int64 failed", err, ret);
printf("%lld\n", (long long)val);
break;
}
case CborByteStringType: {
uint8_t *buf;
size_t n;
ret = cbor_value_dup_byte_string(it, &buf, &n, it);
CBOR_CHECK(ret, "parse byte string failed", err, ret);
dumpbytes(buf, n);
puts("");
free(buf);
continue;
}
case CborTextStringType: {
char *buf;
size_t n;
ret = cbor_value_dup_text_string(it, &buf, &n, it);
CBOR_CHECK(ret, "parse text string failed", err, ret);
puts(buf);
free(buf);
continue;
}
case CborTagType: {
CborTag tag;
ret = cbor_value_get_tag(it, &tag);
CBOR_CHECK(ret, "parse tag failed", err, ret);
printf("Tag(%lld)\n", (long long)tag);
break;
}
case CborSimpleType: {
uint8_t type;
ret = cbor_value_get_simple_type(it, &type);
CBOR_CHECK(ret, "parse simple type failed", err, ret);
printf("simple(%u)\n", type);
break;
}
case CborNullType:
puts("null");
break;
case CborUndefinedType:
puts("undefined");
break;
case CborBooleanType: {
bool val;
ret = cbor_value_get_boolean(it, &val);
CBOR_CHECK(ret, "parse boolean type failed", err, ret);
puts(val ? "true" : "false");
break;
}
case CborHalfFloatType: {
uint16_t val;
ret = cbor_value_get_half_float(it, &val);
CBOR_CHECK(ret, "parse half float type failed", err, ret);
printf("__f16(%04x)\n", val);
break;
}
case CborFloatType: {
float val;
ret = cbor_value_get_float(it, &val);
CBOR_CHECK(ret, "parse float type failed", err, ret);
printf("%g\n", val);
break;
}
case CborDoubleType: {
double val;
ret = cbor_value_get_double(it, &val);
CBOR_CHECK(ret, "parse double float type failed", err, ret);
printf("%g\n", val);
break;
}
case CborInvalidType: {
ret = CborErrorUnknownType;
CBOR_CHECK(ret, "unknown cbor type", err, ret);
break;
}
}
ret = cbor_value_advance_fixed(it);
CBOR_CHECK(ret, "fix value failed", err, ret);
}
return CborNoError;
err:
return ret;
}
TEST_CASE("CBOR example", "[cbor]")
{
CborEncoder root_encoder;
CborParser root_parser;
CborValue it;
uint8_t buf[100];
// Initialize the outermost cbor encoder
cbor_encoder_init(&root_encoder, buf, sizeof(buf), 0);
// Create an array containing several items
CborEncoder array_encoder;
CborEncoder map_encoder;
cbor_encoder_create_array(&root_encoder, &array_encoder, 5); // [
// 1. Create a map containing several pairs
cbor_encoder_create_map(&array_encoder, &map_encoder, 3); // {
// chip:esp32
cbor_encode_text_stringz(&map_encoder, "chip");
cbor_encode_text_stringz(&map_encoder, "esp32");
// unicore:false
cbor_encode_text_stringz(&map_encoder, "unicore");
cbor_encode_boolean(&map_encoder, false);
// ip:[192,168,1,100]
cbor_encode_text_stringz(&map_encoder, "ip");
CborEncoder array2;
cbor_encoder_create_array(&map_encoder, &array2, 4); // [
// Encode several numbers
cbor_encode_uint(&array2, 192);
cbor_encode_uint(&array2, 168);
cbor_encode_uint(&array2, 1);
cbor_encode_uint(&array2, 100);
cbor_encoder_close_container(&map_encoder, &array2); // ]
cbor_encoder_close_container(&array_encoder, &map_encoder); // }
// 2. Encode float number
cbor_encode_float(&array_encoder, 3.14);
// 3. Encode simple value
cbor_encode_simple_value(&array_encoder, 99);
// 4. Encode a string
cbor_encode_text_stringz(&array_encoder, "2019-07-10 09:00:00+0000");
// 5. Encode a undefined value
cbor_encode_undefined(&array_encoder);
cbor_encoder_close_container(&root_encoder, &array_encoder); // ]
// If error happend when encoding, then this value should be meaningless
printf("encoded buffer size %d", cbor_encoder_get_buffer_size(&root_encoder, buf));
// Initialize the cbor parser and the value iterator
cbor_parser_init(buf, sizeof(buf), 0, &root_parser, &it);
printf("convert CBOR to JSON");
// Dump the values in JSON format
cbor_value_to_json(stdout, &it, 0);
puts("");
printf("decode CBOR manually: ");
// Decode CBOR data manully
TEST_ESP_OK(example_dump_cbor_buffer(&it, 0));
}
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