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Diffstat (limited to 'src/3rdparty/tinycbor/src/cborencoder.c')
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diff --git a/src/3rdparty/tinycbor/src/cborencoder.c b/src/3rdparty/tinycbor/src/cborencoder.c new file mode 100644 index 0000000000..52a4025be1 --- /dev/null +++ b/src/3rdparty/tinycbor/src/cborencoder.c @@ -0,0 +1,677 @@ +/**************************************************************************** +** +** Copyright (C) 2018 Intel Corporation +** +** Permission is hereby granted, free of charge, to any person obtaining a copy +** of this software and associated documentation files (the "Software"), to deal +** in the Software without restriction, including without limitation the rights +** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +** copies of the Software, and to permit persons to whom the Software is +** furnished to do so, subject to the following conditions: +** +** The above copyright notice and this permission notice shall be included in +** all copies or substantial portions of the Software. +** +** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +** THE SOFTWARE. +** +****************************************************************************/ + +#ifndef _BSD_SOURCE +#define _BSD_SOURCE 1 +#endif +#ifndef _DEFAULT_SOURCE +#define _DEFAULT_SOURCE 1 +#endif +#ifndef __STDC_LIMIT_MACROS +# define __STDC_LIMIT_MACROS 1 +#endif + +#include "cbor.h" +#include "cborinternal_p.h" +#include "compilersupport_p.h" + +#include <stdlib.h> +#include <string.h> + +/** + * \defgroup CborEncoding Encoding to CBOR + * \brief Group of functions used to encode data to CBOR. + * + * CborEncoder is used to encode data into a CBOR stream. The outermost + * CborEncoder is initialized by calling cbor_encoder_init(), with the buffer + * where the CBOR stream will be stored. The outermost CborEncoder is usually + * used to encode exactly one item, most often an array or map. It is possible + * to encode more than one item, but care must then be taken on the decoder + * side to ensure the state is reset after each item was decoded. + * + * Nested CborEncoder objects are created using cbor_encoder_create_array() and + * cbor_encoder_create_map(), later closed with cbor_encoder_close_container() + * or cbor_encoder_close_container_checked(). The pairs of creation and closing + * must be exactly matched and their parameters are always the same. + * + * CborEncoder writes directly to the user-supplied buffer, without extra + * buffering. CborEncoder does not allocate memory and CborEncoder objects are + * usually created on the stack of the encoding functions. + * + * The example below initializes a CborEncoder object with a buffer and encodes + * a single integer. + * + * \code + * uint8_t buf[16]; + * CborEncoder encoder; + * cbor_encoder_init(&encoder, &buf, sizeof(buf), 0); + * cbor_encode_int(&encoder, some_value); + * \endcode + * + * As explained before, usually the outermost CborEncoder object is used to add + * one array or map, which in turn contains multiple elements. The example + * below creates a CBOR map with one element: a key "foo" and a boolean value. + * + * \code + * uint8_t buf[16]; + * CborEncoder encoder, mapEncoder; + * cbor_encoder_init(&encoder, &buf, sizeof(buf), 0); + * cbor_encoder_create_map(&encoder, &mapEncoder, 1); + * cbor_encode_text_stringz(&mapEncoder, "foo"); + * cbor_encode_boolean(&mapEncoder, some_value); + * cbor_encoder_close_container(&encoder, &mapEncoder); + * \endcode + * + * <h3 class="groupheader">Error checking and buffer size</h3> + * + * All functions operating on CborEncoder return a condition of type CborError. + * If the encoding was successful, they return CborNoError. Some functions do + * extra checking on the input provided and may return some other error + * conditions (for example, cbor_encode_simple_value() checks that the type is + * of the correct type). + * + * In addition, all functions check whether the buffer has enough bytes to + * encode the item being appended. If that is not possible, they return + * CborErrorOutOfMemory. + * + * It is possible to continue with the encoding of data past the first function + * that returns CborErrorOutOfMemory. CborEncoder functions will not overrun + * the buffer, but will instead count how many more bytes are needed to + * complete the encoding. At the end, you can obtain that count by calling + * cbor_encoder_get_extra_bytes_needed(). + * + * \section1 Finalizing the encoding + * + * Once all items have been appended and the containers have all been properly + * closed, the user-supplied buffer will contain the CBOR stream and may be + * immediately used. To obtain the size of the buffer, call + * cbor_encoder_get_buffer_size() with the original buffer pointer. + * + * The example below illustrates how one can encode an item with error checking + * and then pass on the buffer for network sending. + * + * \code + * uint8_t buf[16]; + * CborError err; + * CborEncoder encoder, mapEncoder; + * cbor_encoder_init(&encoder, &buf, sizeof(buf), 0); + * err = cbor_encoder_create_map(&encoder, &mapEncoder, 1); + * if (!err) + * return err; + * err = cbor_encode_text_stringz(&mapEncoder, "foo"); + * if (!err) + * return err; + * err = cbor_encode_boolean(&mapEncoder, some_value); + * if (!err) + * return err; + * err = cbor_encoder_close_container_checked(&encoder, &mapEncoder); + * if (!err) + * return err; + * + * size_t len = cbor_encoder_get_buffer_size(&encoder, buf); + * send_payload(buf, len); + * return CborNoError; + * \endcode + * + * Finally, the example below expands on the one above and also + * deals with dynamically growing the buffer if the initial allocation wasn't + * big enough. Note the two places where the error checking was replaced with + * an cbor_assertion, showing where the author assumes no error can occur. + * + * \code + * uint8_t *encode_string_array(const char **strings, int n, size_t *bufsize) + * { + * CborError err; + * CborEncoder encoder, arrayEncoder; + * size_t size = 256; + * uint8_t *buf = NULL; + * + * while (1) { + * int i; + * size_t more_bytes; + * uint8_t *nbuf = realloc(buf, size); + * if (nbuf == NULL) + * goto error; + * buf = nbuf; + * + * cbor_encoder_init(&encoder, &buf, size, 0); + * err = cbor_encoder_create_array(&encoder, &arrayEncoder, n); + * cbor_assert(err); // can't fail, the buffer is always big enough + * + * for (i = 0; i < n; ++i) { + * err = cbor_encode_text_stringz(&arrayEncoder, strings[i]); + * if (err && err != CborErrorOutOfMemory) + * goto error; + * } + * + * err = cbor_encoder_close_container_checked(&encoder, &arrayEncoder); + * cbor_assert(err); // shouldn't fail! + * + * more_bytes = cbor_encoder_get_extra_bytes_needed(encoder); + * if (more_size) { + * // buffer wasn't big enough, try again + * size += more_bytes; + * continue; + * } + * + * *bufsize = cbor_encoder_get_buffer_size(encoder, buf); + * return buf; + * } + * error: + * free(buf); + * return NULL; + * } + * \endcode + */ + +/** + * \addtogroup CborEncoding + * @{ + */ + +/** + * \struct CborEncoder + * Structure used to encode to CBOR. + */ + +/** + * Initializes a CborEncoder structure \a encoder by pointing it to buffer \a + * buffer of size \a size. The \a flags field is currently unused and must be + * zero. + */ +void cbor_encoder_init(CborEncoder *encoder, uint8_t *buffer, size_t size, int flags) +{ + encoder->data.ptr = buffer; + encoder->end = buffer + size; + encoder->remaining = 2; + encoder->flags = flags; +} + +void cbor_encoder_init_writer(CborEncoder *encoder, CborEncoderWriteFunction writer, void *token) +{ +#ifdef CBOR_ENCODER_WRITE_FUNCTION + (void) writer; +#else + encoder->data.writer = writer; +#endif + encoder->end = (uint8_t *)token; + encoder->remaining = 2; + encoder->flags = CborIteratorFlag_WriterFunction; +} + +static inline void put16(void *where, uint16_t v) +{ + v = cbor_htons(v); + memcpy(where, &v, sizeof(v)); +} + +/* Note: Since this is currently only used in situations where OOM is the only + * valid error, we KNOW this to be true. Thus, this function now returns just 'true', + * but if in the future, any function starts returning a non-OOM error, this will need + * to be changed to the test. At the moment, this is done to prevent more branches + * being created in the tinycbor output */ +static inline bool isOomError(CborError err) +{ + if (CBOR_ENCODER_WRITER_CONTROL < 0) + return true; + + /* CborErrorOutOfMemory is the only negative error code, intentionally + * so we can write the test like this */ + return (int)err < 0; +} + +static inline void put32(void *where, uint32_t v) +{ + v = cbor_htonl(v); + memcpy(where, &v, sizeof(v)); +} + +static inline void put64(void *where, uint64_t v) +{ + v = cbor_htonll(v); + memcpy(where, &v, sizeof(v)); +} + +static inline bool would_overflow(CborEncoder *encoder, size_t len) +{ + ptrdiff_t remaining = (ptrdiff_t)encoder->end; + remaining -= remaining ? (ptrdiff_t)encoder->data.ptr : encoder->data.bytes_needed; + remaining -= (ptrdiff_t)len; + return unlikely(remaining < 0); +} + +static inline void advance_ptr(CborEncoder *encoder, size_t n) +{ + if (encoder->end) + encoder->data.ptr += n; + else + encoder->data.bytes_needed += n; +} + +static inline CborError append_to_buffer(CborEncoder *encoder, const void *data, size_t len, + CborEncoderAppendType appendType) +{ + if (CBOR_ENCODER_WRITER_CONTROL >= 0) { + if (encoder->flags & CborIteratorFlag_WriterFunction || CBOR_ENCODER_WRITER_CONTROL != 0) { +# ifdef CBOR_ENCODER_WRITE_FUNCTION + return CBOR_ENCODER_WRITE_FUNCTION(encoder->end, data, len, appendType); +# else + return encoder->data.writer(encoder->end, data, len, appendType); +# endif + } + } + +#if CBOR_ENCODER_WRITER_CONTROL <= 0 + if (would_overflow(encoder, len)) { + if (encoder->end != NULL) { + len -= encoder->end - encoder->data.ptr; + encoder->end = NULL; + encoder->data.bytes_needed = 0; + } + + advance_ptr(encoder, len); + return CborErrorOutOfMemory; + } + + memcpy(encoder->data.ptr, data, len); + encoder->data.ptr += len; +#endif + return CborNoError; +} + +static inline CborError append_byte_to_buffer(CborEncoder *encoder, uint8_t byte) +{ + return append_to_buffer(encoder, &byte, 1, CborEncoderAppendCborData); +} + +static inline CborError encode_number_no_update(CborEncoder *encoder, uint64_t ui, uint8_t shiftedMajorType) +{ + /* Little-endian would have been so much more convenient here: + * We could just write at the beginning of buf but append_to_buffer + * only the necessary bytes. + * Since it has to be big endian, do it the other way around: + * write from the end. */ + uint64_t buf[2]; + uint8_t *const bufend = (uint8_t *)buf + sizeof(buf); + uint8_t *bufstart = bufend - 1; + put64(buf + 1, ui); /* we probably have a bunch of zeros in the beginning */ + + if (ui < Value8Bit) { + *bufstart += shiftedMajorType; + } else { + uint8_t more = 0; + if (ui > 0xffU) + ++more; + if (ui > 0xffffU) + ++more; + if (ui > 0xffffffffU) + ++more; + bufstart -= (size_t)1 << more; + *bufstart = shiftedMajorType + Value8Bit + more; + } + + return append_to_buffer(encoder, bufstart, bufend - bufstart, CborEncoderAppendCborData); +} + +static inline void saturated_decrement(CborEncoder *encoder) +{ + if (encoder->remaining) + --encoder->remaining; +} + +static inline CborError encode_number(CborEncoder *encoder, uint64_t ui, uint8_t shiftedMajorType) +{ + saturated_decrement(encoder); + return encode_number_no_update(encoder, ui, shiftedMajorType); +} + +/** + * Appends the unsigned 64-bit integer \a value to the CBOR stream provided by + * \a encoder. + * + * \sa cbor_encode_negative_int, cbor_encode_int + */ +CborError cbor_encode_uint(CborEncoder *encoder, uint64_t value) +{ + return encode_number(encoder, value, UnsignedIntegerType << MajorTypeShift); +} + +/** + * Appends the negative 64-bit integer whose absolute value is \a + * absolute_value to the CBOR stream provided by \a encoder. + * + * If the value \a absolute_value is zero, this function encodes -2^64. + * + * \sa cbor_encode_uint, cbor_encode_int + */ +CborError cbor_encode_negative_int(CborEncoder *encoder, uint64_t absolute_value) +{ + return encode_number(encoder, absolute_value - 1, NegativeIntegerType << MajorTypeShift); +} + +/** + * Appends the signed 64-bit integer \a value to the CBOR stream provided by + * \a encoder. + * + * \sa cbor_encode_negative_int, cbor_encode_uint + */ +CborError cbor_encode_int(CborEncoder *encoder, int64_t value) +{ + /* adapted from code in RFC 7049 appendix C (pseudocode) */ + uint64_t ui = value >> 63; /* extend sign to whole length */ + uint8_t majorType = ui & 0x20; /* extract major type */ + ui ^= value; /* complement negatives */ + return encode_number(encoder, ui, majorType); +} + +/** + * Appends the CBOR Simple Type of value \a value to the CBOR stream provided by + * \a encoder. + * + * This function may return error CborErrorIllegalSimpleType if the \a value + * variable contains a number that is not a valid simple type. + */ +CborError cbor_encode_simple_value(CborEncoder *encoder, uint8_t value) +{ +#ifndef CBOR_ENCODER_NO_CHECK_USER + /* check if this is a valid simple type */ + if (value >= HalfPrecisionFloat && value <= Break) + return CborErrorIllegalSimpleType; +#endif + return encode_number(encoder, value, SimpleTypesType << MajorTypeShift); +} + +/** + * Appends the floating-point value of type \a fpType and pointed to by \a + * value to the CBOR stream provided by \a encoder. The value of \a fpType must + * be one of CborHalfFloatType, CborFloatType or CborDoubleType, otherwise the + * behavior of this function is undefined. + * + * This function is useful for code that needs to pass through floating point + * values but does not wish to have the actual floating-point code. + * + * \sa cbor_encode_half_float, cbor_encode_float, cbor_encode_double + */ +CborError cbor_encode_floating_point(CborEncoder *encoder, CborType fpType, const void *value) +{ + unsigned size; + uint8_t buf[1 + sizeof(uint64_t)]; + cbor_assert(fpType == CborHalfFloatType || fpType == CborFloatType || fpType == CborDoubleType); + buf[0] = fpType; + + size = 2U << (fpType - CborHalfFloatType); + if (size == 8) + put64(buf + 1, *(const uint64_t*)value); + else if (size == 4) + put32(buf + 1, *(const uint32_t*)value); + else + put16(buf + 1, *(const uint16_t*)value); + saturated_decrement(encoder); + return append_to_buffer(encoder, buf, size + 1, CborEncoderAppendCborData); +} + +/** + * Appends the CBOR tag \a tag to the CBOR stream provided by \a encoder. + * + * \sa CborTag + */ +CborError cbor_encode_tag(CborEncoder *encoder, CborTag tag) +{ + /* tags don't count towards the number of elements in an array or map */ + return encode_number_no_update(encoder, tag, TagType << MajorTypeShift); +} + +static CborError encode_string(CborEncoder *encoder, size_t length, uint8_t shiftedMajorType, const void *string) +{ + CborError err = encode_number(encoder, length, shiftedMajorType); + if (err && !isOomError(err)) + return err; + return append_to_buffer(encoder, string, length, CborEncoderAppendStringData); +} + +/** + * \fn CborError cbor_encode_text_stringz(CborEncoder *encoder, const char *string) + * + * Appends the null-terminated text string \a string to the CBOR stream + * provided by \a encoder. CBOR requires that \a string be valid UTF-8, but + * TinyCBOR makes no verification of correctness. The terminating null is not + * included in the stream. + * + * \sa cbor_encode_text_string, cbor_encode_byte_string + */ + +/** + * Appends the text string \a string of length \a length to the CBOR stream + * provided by \a encoder. CBOR requires that \a string be valid UTF-8, but + * TinyCBOR makes no verification of correctness. + * + * \sa CborError cbor_encode_text_stringz, cbor_encode_byte_string + */ +CborError cbor_encode_byte_string(CborEncoder *encoder, const uint8_t *string, size_t length) +{ + return encode_string(encoder, length, ByteStringType << MajorTypeShift, string); +} + +/** + * Appends the byte string \a string of length \a length to the CBOR stream + * provided by \a encoder. CBOR byte strings are arbitrary raw data. + * + * \sa cbor_encode_text_stringz, cbor_encode_text_string + */ +CborError cbor_encode_text_string(CborEncoder *encoder, const char *string, size_t length) +{ + return encode_string(encoder, length, TextStringType << MajorTypeShift, string); +} + +#ifdef __GNUC__ +__attribute__((noinline)) +#endif +static CborError create_container(CborEncoder *encoder, CborEncoder *container, size_t length, uint8_t shiftedMajorType) +{ + CborError err; + container->data.ptr = encoder->data.ptr; + container->end = encoder->end; + saturated_decrement(encoder); + container->remaining = length + 1; /* overflow ok on CborIndefiniteLength */ + + cbor_static_assert((int)CborIteratorFlag_ContainerIsMap_ == (int)CborIteratorFlag_ContainerIsMap); + cbor_static_assert(((MapType << MajorTypeShift) & CborIteratorFlag_ContainerIsMap) == CborIteratorFlag_ContainerIsMap); + cbor_static_assert(((ArrayType << MajorTypeShift) & CborIteratorFlag_ContainerIsMap) == 0); + container->flags = shiftedMajorType & CborIteratorFlag_ContainerIsMap; + if (CBOR_ENCODER_WRITER_CONTROL == 0) + container->flags |= encoder->flags & CborIteratorFlag_WriterFunction; + + if (length == CborIndefiniteLength) { + container->flags |= CborIteratorFlag_UnknownLength; + err = append_byte_to_buffer(container, shiftedMajorType + IndefiniteLength); + } else { + if (shiftedMajorType & CborIteratorFlag_ContainerIsMap) + container->remaining += length; + err = encode_number_no_update(container, length, shiftedMajorType); + } + return err; +} + +/** + * Creates a CBOR array in the CBOR stream provided by \a encoder and + * initializes \a arrayEncoder so that items can be added to the array using + * the CborEncoder functions. The array must be terminated by calling either + * cbor_encoder_close_container() or cbor_encoder_close_container_checked() + * with the same \a encoder and \a arrayEncoder parameters. + * + * The number of items inserted into the array must be exactly \a length items, + * otherwise the stream is invalid. If the number of items is not known when + * creating the array, the constant \ref CborIndefiniteLength may be passed as + * length instead. + * + * \sa cbor_encoder_create_map + */ +CborError cbor_encoder_create_array(CborEncoder *encoder, CborEncoder *arrayEncoder, size_t length) +{ + return create_container(encoder, arrayEncoder, length, ArrayType << MajorTypeShift); +} + +/** + * Creates a CBOR map in the CBOR stream provided by \a encoder and + * initializes \a mapEncoder so that items can be added to the map using + * the CborEncoder functions. The map must be terminated by calling either + * cbor_encoder_close_container() or cbor_encoder_close_container_checked() + * with the same \a encoder and \a mapEncoder parameters. + * + * The number of pair of items inserted into the map must be exactly \a length + * items, otherwise the stream is invalid. If the number is not known + * when creating the map, the constant \ref CborIndefiniteLength may be passed as + * length instead. + * + * \b{Implementation limitation:} TinyCBOR cannot encode more than SIZE_MAX/2 + * key-value pairs in the stream. If the length \a length is larger than this + * value (and is not \ref CborIndefiniteLength), this function returns error + * CborErrorDataTooLarge. + * + * \sa cbor_encoder_create_array + */ +CborError cbor_encoder_create_map(CborEncoder *encoder, CborEncoder *mapEncoder, size_t length) +{ + if (length != CborIndefiniteLength && length > SIZE_MAX / 2) + return CborErrorDataTooLarge; + return create_container(encoder, mapEncoder, length, MapType << MajorTypeShift); +} + +/** + * Closes the CBOR container (array or map) provided by \a containerEncoder and + * updates the CBOR stream provided by \a encoder. Both parameters must be the + * same as were passed to cbor_encoder_create_array() or + * cbor_encoder_create_map(). + * + * Since version 0.5, this function verifies that the number of items (or pairs + * of items, in the case of a map) was correct. It is no longer necessary to call + * cbor_encoder_close_container_checked() instead. + * + * \sa cbor_encoder_create_array(), cbor_encoder_create_map() + */ +CborError cbor_encoder_close_container(CborEncoder *encoder, const CborEncoder *containerEncoder) +{ + if (encoder->end && !(encoder->flags & CborIteratorFlag_WriterFunction)) + encoder->data.ptr = containerEncoder->data.ptr; + else + encoder->data.bytes_needed = containerEncoder->data.bytes_needed; + encoder->end = containerEncoder->end; + if (containerEncoder->flags & CborIteratorFlag_UnknownLength) + return append_byte_to_buffer(encoder, BreakByte); + + if (containerEncoder->remaining != 1) + return containerEncoder->remaining == 0 ? CborErrorTooManyItems : CborErrorTooFewItems; + + if (!encoder->end) + return CborErrorOutOfMemory; /* keep the state */ + return CborNoError; +} + +/** + * \fn CborError cbor_encode_boolean(CborEncoder *encoder, bool value) + * + * Appends the boolean value \a value to the CBOR stream provided by \a encoder. + */ + +/** + * \fn CborError cbor_encode_null(CborEncoder *encoder) + * + * Appends the CBOR type representing a null value to the CBOR stream provided + * by \a encoder. + * + * \sa cbor_encode_undefined() + */ + +/** + * \fn CborError cbor_encode_undefined(CborEncoder *encoder) + * + * Appends the CBOR type representing an undefined value to the CBOR stream + * provided by \a encoder. + * + * \sa cbor_encode_null() + */ + +/** + * \fn CborError cbor_encode_half_float(CborEncoder *encoder, const void *value) + * + * Appends the IEEE 754 half-precision (16-bit) floating point value pointed to + * by \a value to the CBOR stream provided by \a encoder. + * + * \sa cbor_encode_floating_point(), cbor_encode_float(), cbor_encode_double() + */ + +/** + * \fn CborError cbor_encode_float(CborEncoder *encoder, float value) + * + * Appends the IEEE 754 single-precision (32-bit) floating point value \a value + * to the CBOR stream provided by \a encoder. + * + * \sa cbor_encode_floating_point(), cbor_encode_half_float(), cbor_encode_double() + */ + +/** + * \fn CborError cbor_encode_double(CborEncoder *encoder, double value) + * + * Appends the IEEE 754 double-precision (64-bit) floating point value \a value + * to the CBOR stream provided by \a encoder. + * + * \sa cbor_encode_floating_point(), cbor_encode_half_float(), cbor_encode_float() + */ + +/** + * \fn size_t cbor_encoder_get_buffer_size(const CborEncoder *encoder, const uint8_t *buffer) + * + * Returns the total size of the buffer starting at \a buffer after the + * encoding finished without errors. The \a encoder and \a buffer arguments + * must be the same as supplied to cbor_encoder_init(). + * + * If the encoding process had errors, the return value of this function is + * meaningless. If the only errors were CborErrorOutOfMemory, instead use + * cbor_encoder_get_extra_bytes_needed() to find out by how much to grow the + * buffer before encoding again. + * + * See \ref CborEncoding for an example of using this function. + * + * \sa cbor_encoder_init(), cbor_encoder_get_extra_bytes_needed(), CborEncoding + */ + +/** + * \fn size_t cbor_encoder_get_extra_bytes_needed(const CborEncoder *encoder) + * + * Returns how many more bytes the original buffer supplied to + * cbor_encoder_init() needs to be extended by so that no CborErrorOutOfMemory + * condition will happen for the encoding. If the buffer was big enough, this + * function returns 0. The \a encoder must be the original argument as passed + * to cbor_encoder_init(). + * + * This function is usually called after an encoding sequence ended with one or + * more CborErrorOutOfMemory errors, but no other error. If any other error + * happened, the return value of this function is meaningless. + * + * See \ref CborEncoding for an example of using this function. + * + * \sa cbor_encoder_init(), cbor_encoder_get_buffer_size(), CborEncoding + */ + +/** @} */ |