/****************************************************************************
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**
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** Copyright (C) 2015 Intel Corporation
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**
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** Permission is hereby granted, free of charge, to any person obtaining a copy
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** of this software and associated documentation files (the "Software"), to deal
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** in the Software without restriction, including without limitation the rights
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** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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** copies of the Software, and to permit persons to whom the Software is
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** furnished to do so, subject to the following conditions:
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**
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** The above copyright notice and this permission notice shall be included in
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** all copies or substantial portions of the Software.
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**
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** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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** THE SOFTWARE.
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**
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****************************************************************************/
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#ifndef CBOR_H
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#define CBOR_H
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#include <assert.h>
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#include <limits.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdio.h>
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#ifdef __cplusplus
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extern "C" {
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#else
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#include <stdbool.h>
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#endif
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#pragma diag_suppress 66
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#ifndef SIZE_MAX
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/* Some systems fail to define SIZE_MAX in <stdint.h>, even though C99 requires it...
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* Conversion from signed to unsigned is defined in 6.3.1.3 (Signed and unsigned integers) p2,
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* which says: "the value is converted by repeatedly adding or subtracting one more than the
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* maximum value that can be represented in the new type until the value is in the range of the
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* new type."
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* So -1 gets converted to size_t by adding SIZE_MAX + 1, which results in SIZE_MAX.
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*/
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# define SIZE_MAX ((size_t)-1)
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#endif
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#ifndef CBOR_API
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# define CBOR_API
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#endif
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#ifndef CBOR_PRIVATE_API
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# define CBOR_PRIVATE_API
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#endif
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#ifndef CBOR_INLINE_API
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# if defined(__cplusplus)
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# define CBOR_INLINE inline
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# define CBOR_INLINE_API inline
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# else
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# define CBOR_INLINE_API static CBOR_INLINE
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# if defined(_MSC_VER)
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# define CBOR_INLINE __inline
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# elif defined(__GNUC__)
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# define CBOR_INLINE __inline__
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# elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
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# define CBOR_INLINE inline
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# else
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# define CBOR_INLINE
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# endif
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# endif
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#endif
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typedef enum CborType {
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CborIntegerType = 0x00,
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CborByteStringType = 0x40,
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CborTextStringType = 0x60,
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CborArrayType = 0x80,
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CborMapType = 0xa0,
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CborTagType = 0xc0,
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CborSimpleType = 0xe0,
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CborBooleanType = 0xf5,
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CborNullType = 0xf6,
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CborUndefinedType = 0xf7,
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CborHalfFloatType = 0xf9,
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CborFloatType = 0xfa,
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CborDoubleType = 0xfb,
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CborInvalidType = 0xff /* equivalent to the break byte, so it will never be used */
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} CborType;
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typedef uint64_t CborTag;
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typedef enum CborKnownTags {
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CborDateTimeStringTag = 0, /* RFC 3339 format: YYYY-MM-DD hh:mm:ss+zzzz */
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CborUnixTime_tTag = 1,
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CborPositiveBignumTag = 2,
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CborNegativeBignumTag = 3,
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CborDecimalTag = 4,
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CborBigfloatTag = 5,
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CborExpectedBase64urlTag = 21,
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CborExpectedBase64Tag = 22,
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CborExpectedBase16Tag = 23,
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CborUriTag = 32,
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CborBase64urlTag = 33,
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CborBase64Tag = 34,
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CborRegularExpressionTag = 35,
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CborMimeMessageTag = 36, /* RFC 2045-2047 */
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CborSignatureTag = 55799
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} CborKnownTags;
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/* Error API */
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typedef enum CborError {
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CborNoError = 0,
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/* errors in all modes */
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CborUnknownError,
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CborErrorUnknownLength, /* request for length in array, map, or string with indeterminate length */
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CborErrorAdvancePastEOF,
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CborErrorIO,
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/* parser errors streaming errors */
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CborErrorGarbageAtEnd = 256,
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CborErrorUnexpectedEOF,
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CborErrorUnexpectedBreak,
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CborErrorUnknownType, /* can only heppen in major type 7 */
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CborErrorIllegalType, /* type not allowed here */
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CborErrorIllegalNumber,
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CborErrorIllegalSimpleType, /* types of value less than 32 encoded in two bytes */
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/* parser errors in strict mode parsing only */
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CborErrorUnknownSimpleType = 512,
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CborErrorUnknownTag,
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CborErrorInappropriateTagForType,
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CborErrorDuplicateObjectKeys,
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CborErrorInvalidUtf8TextString,
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/* encoder errors */
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CborErrorTooManyItems = 768,
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CborErrorTooFewItems,
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/* internal implementation errors */
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CborErrorDataTooLarge = 1024,
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CborErrorNestingTooDeep,
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CborErrorUnsupportedType,
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/* errors in converting to JSON */
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CborErrorJsonObjectKeyIsAggregate,
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CborErrorJsonObjectKeyNotString,
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CborErrorJsonNotImplemented,
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CborErrorOutOfMemory = ~0U / 2 + 1,
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CborErrorInternalError = ~0U
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} CborError;
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CBOR_API const char *cbor_error_string(CborError error);
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struct cbor_encoder_writer;
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typedef int (cbor_encoder_write)(struct cbor_encoder_writer *, const char *data, int len);
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typedef struct cbor_encoder_writer {
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cbor_encoder_write* write_func;
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int bytes_written;
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} cbor_encoder_writer;
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struct cbor_iovec {
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void *iov_base;
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size_t iov_len;
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};
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/* Encoder API */
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struct CborEncoder {
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cbor_encoder_writer *writer;
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void *writer_arg;
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size_t added;
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int flags;
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};
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typedef struct CborEncoder CborEncoder;
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static const size_t CborIndefiniteLength = SIZE_MAX;
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CBOR_API void cbor_encoder_init(CborEncoder *encoder, cbor_encoder_writer *pwriter, int flags);
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CBOR_API CborError cbor_encode_uint(CborEncoder *encoder, uint64_t value);
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CBOR_API CborError cbor_encode_int(CborEncoder *encoder, int64_t value);
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CBOR_API CborError cbor_encode_negative_int(CborEncoder *encoder, uint64_t absolute_value);
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CBOR_API CborError cbor_encode_simple_value(CborEncoder *encoder, uint8_t value);
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CBOR_API CborError cbor_encode_tag(CborEncoder *encoder, CborTag tag);
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CBOR_API CborError cbor_encode_text_string(CborEncoder *encoder, const char *string, size_t length);
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CBOR_INLINE_API CborError cbor_encode_text_stringz(CborEncoder *encoder, const char *string)
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{ return cbor_encode_text_string(encoder, string, strlen(string)); }
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CBOR_API CborError cbor_encode_byte_string(CborEncoder *encoder, const uint8_t *string, size_t length);
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CBOR_API CborError cbor_encode_byte_iovec(CborEncoder *encoder,
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const struct cbor_iovec iov[],
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int iov_len);
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CBOR_API CborError cbor_encode_floating_point(CborEncoder *encoder, CborType fpType, const void *value);
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CBOR_INLINE_API int cbor_encode_bytes_written(CborEncoder *encoder)
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{ return encoder->writer->bytes_written; }
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CBOR_INLINE_API CborError cbor_encode_boolean(CborEncoder *encoder, bool value)
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{ return cbor_encode_simple_value(encoder, (int)value - 1 + (CborBooleanType & 0x1f)); }
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CBOR_INLINE_API CborError cbor_encode_null(CborEncoder *encoder)
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{ return cbor_encode_simple_value(encoder, CborNullType & 0x1f); }
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CBOR_INLINE_API CborError cbor_encode_undefined(CborEncoder *encoder)
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{ return cbor_encode_simple_value(encoder, CborUndefinedType & 0x1f); }
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CBOR_INLINE_API CborError cbor_encode_half_float(CborEncoder *encoder, const void *value)
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{ return cbor_encode_floating_point(encoder, CborHalfFloatType, value); }
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CBOR_INLINE_API CborError cbor_encode_float(CborEncoder *encoder, float value)
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{ return cbor_encode_floating_point(encoder, CborFloatType, &value); }
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CBOR_INLINE_API CborError cbor_encode_double(CborEncoder *encoder, double value)
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{ return cbor_encode_floating_point(encoder, CborDoubleType, &value); }
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CBOR_API CborError cbor_encoder_create_array(CborEncoder *encoder, CborEncoder *arrayEncoder, size_t length);
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CBOR_API CborError cbor_encoder_create_map(CborEncoder *encoder, CborEncoder *mapEncoder, size_t length);
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CBOR_API CborError cbor_encoder_create_indef_text_string(CborEncoder *encoder, CborEncoder *stringEncoder);
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CBOR_API CborError cbor_encoder_create_indef_byte_string(CborEncoder *encoder, CborEncoder *stringEncoder);
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CBOR_API CborError cbor_encoder_close_container(CborEncoder *encoder, const CborEncoder *containerEncoder);
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CBOR_API CborError cbor_encoder_close_container_checked(CborEncoder *encoder, const CborEncoder *containerEncoder);
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/* Parser API */
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enum CborParserIteratorFlags
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{
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CborIteratorFlag_IntegerValueTooLarge = 0x01,
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CborIteratorFlag_NegativeInteger = 0x02,
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CborIteratorFlag_UnknownLength = 0x04,
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CborIteratorFlag_ContainerIsMap = 0x20
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};
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struct cbor_decoder_reader;
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typedef uint8_t (cbor_reader_get8)(struct cbor_decoder_reader *d, int offset);
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typedef uint16_t (cbor_reader_get16)(struct cbor_decoder_reader *d, int offset);
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typedef uint32_t (cbor_reader_get32)(struct cbor_decoder_reader *d, int offset);
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typedef uint64_t (cbor_reader_get64)(struct cbor_decoder_reader *d, int offset);
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typedef uintptr_t (cbor_memcmp)(struct cbor_decoder_reader *d, char *buf, int offset, size_t len);
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typedef uintptr_t (cbor_memcpy)(struct cbor_decoder_reader *d, char *buf, int offset, size_t len);
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struct cbor_decoder_reader {
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cbor_reader_get8 *get8;
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cbor_reader_get16 *get16;
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cbor_reader_get32 *get32;
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cbor_reader_get64 *get64;
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cbor_memcmp *cmp;
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cbor_memcpy *cpy;
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size_t message_size;
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};
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struct CborParser
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{
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struct cbor_decoder_reader *d;
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int end;
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int flags;
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};
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typedef struct CborParser CborParser;
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struct CborValue
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{
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const CborParser *parser;
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int offset;
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uint32_t remaining;
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uint16_t extra;
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uint8_t type;
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uint8_t flags;
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};
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typedef struct CborValue CborValue;
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CBOR_API CborError cbor_parser_init(struct cbor_decoder_reader *d, int flags, CborParser *parser, CborValue *it);
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CBOR_INLINE_API bool cbor_value_at_end(const CborValue *it)
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{ return it->remaining == 0; }
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CBOR_API CborError cbor_value_advance_fixed(CborValue *it);
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CBOR_API CborError cbor_value_advance(CborValue *it);
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CBOR_INLINE_API bool cbor_value_is_container(const CborValue *it)
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{ return it->type == CborArrayType || it->type == CborMapType; }
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CBOR_API CborError cbor_value_enter_container(const CborValue *it, CborValue *recursed);
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CBOR_API CborError cbor_value_leave_container(CborValue *it, const CborValue *recursed);
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CBOR_PRIVATE_API uint64_t _cbor_value_decode_int64_internal(const CborValue *value);
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CBOR_INLINE_API uint64_t _cbor_value_extract_int64_helper(const CborValue *value)
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{
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return value->flags & CborIteratorFlag_IntegerValueTooLarge ?
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_cbor_value_decode_int64_internal(value) : value->extra;
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}
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CBOR_INLINE_API bool cbor_value_is_valid(const CborValue *value)
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{ return value && value->type != CborInvalidType; }
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CBOR_INLINE_API CborType cbor_value_get_type(const CborValue *value)
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{ return (CborType)value->type; }
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/* Null & undefined type */
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CBOR_INLINE_API bool cbor_value_is_null(const CborValue *value)
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{ return value->type == CborNullType; }
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CBOR_INLINE_API bool cbor_value_is_undefined(const CborValue *value)
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{ return value->type == CborUndefinedType; }
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/* Booleans */
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CBOR_INLINE_API bool cbor_value_is_boolean(const CborValue *value)
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{ return value->type == CborBooleanType; }
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CBOR_INLINE_API CborError cbor_value_get_boolean(const CborValue *value, bool *result)
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{
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assert(cbor_value_is_boolean(value));
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*result = !!value->extra;
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return CborNoError;
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}
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/* Simple types */
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CBOR_INLINE_API bool cbor_value_is_simple_type(const CborValue *value)
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{ return value->type == CborSimpleType; }
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CBOR_INLINE_API CborError cbor_value_get_simple_type(const CborValue *value, uint8_t *result)
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{
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assert(cbor_value_is_simple_type(value));
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*result = (uint8_t)value->extra;
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return CborNoError;
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}
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/* Integers */
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CBOR_INLINE_API bool cbor_value_is_integer(const CborValue *value)
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{ return value->type == CborIntegerType; }
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CBOR_INLINE_API bool cbor_value_is_unsigned_integer(const CborValue *value)
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{ return cbor_value_is_integer(value) && (value->flags & CborIteratorFlag_NegativeInteger) == 0; }
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CBOR_INLINE_API bool cbor_value_is_negative_integer(const CborValue *value)
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{ return cbor_value_is_integer(value) && (value->flags & CborIteratorFlag_NegativeInteger); }
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CBOR_INLINE_API CborError cbor_value_get_raw_integer(const CborValue *value, uint64_t *result)
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{
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assert(cbor_value_is_integer(value));
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*result = _cbor_value_extract_int64_helper(value);
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return CborNoError;
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}
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CBOR_INLINE_API CborError cbor_value_get_uint64(const CborValue *value, uint64_t *result)
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{
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assert(cbor_value_is_unsigned_integer(value));
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*result = _cbor_value_extract_int64_helper(value);
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return CborNoError;
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}
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CBOR_INLINE_API CborError cbor_value_get_int64(const CborValue *value, int64_t *result)
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{
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assert(cbor_value_is_integer(value));
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*result = (int64_t) _cbor_value_extract_int64_helper(value);
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if (value->flags & CborIteratorFlag_NegativeInteger)
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*result = -*result - 1;
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return CborNoError;
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}
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CBOR_INLINE_API CborError cbor_value_get_int(const CborValue *value, int *result)
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{
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assert(cbor_value_is_integer(value));
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*result = (int) _cbor_value_extract_int64_helper(value);
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if (value->flags & CborIteratorFlag_NegativeInteger)
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*result = -*result - 1;
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return CborNoError;
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}
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CBOR_API CborError cbor_value_get_int64_checked(const CborValue *value, int64_t *result);
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CBOR_API CborError cbor_value_get_int_checked(const CborValue *value, int *result);
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CBOR_INLINE_API bool cbor_value_is_length_known(const CborValue *value)
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{ return (value->flags & CborIteratorFlag_UnknownLength) == 0; }
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/* Tags */
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CBOR_INLINE_API bool cbor_value_is_tag(const CborValue *value)
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{ return value->type == CborTagType; }
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CBOR_INLINE_API CborError cbor_value_get_tag(const CborValue *value, CborTag *result)
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{
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assert(cbor_value_is_tag(value));
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*result = _cbor_value_extract_int64_helper(value);
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return CborNoError;
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}
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CBOR_API CborError cbor_value_skip_tag(CborValue *it);
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/* Strings */
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CBOR_INLINE_API bool cbor_value_is_byte_string(const CborValue *value)
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{ return value->type == CborByteStringType; }
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CBOR_INLINE_API bool cbor_value_is_text_string(const CborValue *value)
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{ return value->type == CborTextStringType; }
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CBOR_INLINE_API CborError cbor_value_get_string_length(const CborValue *value, size_t *length)
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{
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assert(cbor_value_is_byte_string(value) || cbor_value_is_text_string(value));
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if (!cbor_value_is_length_known(value))
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return CborErrorUnknownLength;
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uint64_t v = _cbor_value_extract_int64_helper(value);
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*length = v;
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if (*length != v)
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return CborErrorDataTooLarge;
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return CborNoError;
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}
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CBOR_PRIVATE_API CborError _cbor_value_copy_string(const CborValue *value, void *buffer,
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size_t *buflen, CborValue *next);
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CBOR_PRIVATE_API CborError _cbor_value_dup_string(const CborValue *value, void **buffer,
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size_t *buflen, CborValue *next);
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CBOR_API CborError cbor_value_calculate_string_length(const CborValue *value, size_t *length);
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CBOR_INLINE_API CborError cbor_value_copy_text_string(const CborValue *value, char *buffer,
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size_t *buflen, CborValue *next)
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{
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assert(cbor_value_is_text_string(value));
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return _cbor_value_copy_string(value, buffer, buflen, next);
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}
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CBOR_INLINE_API CborError cbor_value_copy_byte_string(const CborValue *value, uint8_t *buffer,
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size_t *buflen, CborValue *next)
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{
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assert(cbor_value_is_byte_string(value));
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return _cbor_value_copy_string(value, buffer, buflen, next);
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}
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CBOR_INLINE_API CborError cbor_value_dup_text_string(const CborValue *value, char **buffer,
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size_t *buflen, CborValue *next)
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{
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assert(cbor_value_is_text_string(value));
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return _cbor_value_dup_string(value, (void **)buffer, buflen, next);
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}
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CBOR_INLINE_API CborError cbor_value_dup_byte_string(const CborValue *value, uint8_t **buffer,
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size_t *buflen, CborValue *next)
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{
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assert(cbor_value_is_byte_string(value));
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return _cbor_value_dup_string(value, (void **)buffer, buflen, next);
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}
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/* ### TBD: partial reading API */
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CBOR_API CborError cbor_value_text_string_equals(const CborValue *value, const char *string, bool *result);
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/* Maps and arrays */
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CBOR_INLINE_API bool cbor_value_is_array(const CborValue *value)
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{ return value->type == CborArrayType; }
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CBOR_INLINE_API bool cbor_value_is_map(const CborValue *value)
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{ return value->type == CborMapType; }
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CBOR_INLINE_API CborError cbor_value_get_array_length(const CborValue *value, size_t *length)
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{
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assert(cbor_value_is_array(value));
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if (!cbor_value_is_length_known(value))
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return CborErrorUnknownLength;
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uint64_t v = _cbor_value_extract_int64_helper(value);
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*length = v;
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if (*length != v)
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return CborErrorDataTooLarge;
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return CborNoError;
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}
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CBOR_INLINE_API CborError cbor_value_get_map_length(const CborValue *value, size_t *length)
|
{
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assert(cbor_value_is_map(value));
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if (!cbor_value_is_length_known(value))
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return CborErrorUnknownLength;
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uint64_t v = _cbor_value_extract_int64_helper(value);
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*length = v;
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if (*length != v)
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return CborErrorDataTooLarge;
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return CborNoError;
|
}
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CBOR_API CborError cbor_value_map_find_value(const CborValue *map, const char *string, CborValue *element);
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/* Floating point */
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CBOR_INLINE_API bool cbor_value_is_half_float(const CborValue *value)
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{ return value->type == CborHalfFloatType; }
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CBOR_API CborError cbor_value_get_half_float(const CborValue *value, void *result);
|
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CBOR_INLINE_API bool cbor_value_is_float(const CborValue *value)
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{ return value->type == CborFloatType; }
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CBOR_INLINE_API CborError cbor_value_get_float(const CborValue *value, float *result)
|
{
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assert(cbor_value_is_float(value));
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assert(value->flags & CborIteratorFlag_IntegerValueTooLarge);
|
uint32_t data = (uint32_t)_cbor_value_decode_int64_internal(value);
|
memcpy(result, &data, sizeof(*result));
|
return CborNoError;
|
}
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CBOR_INLINE_API bool cbor_value_is_double(const CborValue *value)
|
{ return value->type == CborDoubleType; }
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CBOR_INLINE_API CborError cbor_value_get_double(const CborValue *value, double *result)
|
{
|
assert(cbor_value_is_double(value));
|
assert(value->flags & CborIteratorFlag_IntegerValueTooLarge);
|
uint64_t data = _cbor_value_decode_int64_internal(value);
|
memcpy(result, &data, sizeof(*result));
|
return CborNoError;
|
}
|
|
/* Human-readable (dump) API */
|
CBOR_API CborError cbor_value_to_pretty_advance(FILE *out, CborValue *value);
|
CBOR_INLINE_API CborError cbor_value_to_pretty(FILE *out, const CborValue *value)
|
{
|
CborValue copy = *value;
|
return cbor_value_to_pretty_advance(out, ©);
|
}
|
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struct mgmt_cbuf {
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struct CborParser parser;
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struct CborEncoder encoder;
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struct CborValue it;
|
};
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|
#ifdef __cplusplus
|
}
|
#endif
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#endif /* CBOR_H */
|