cborinternal_p.h File Reference

Go to the source code of this file.

Functions
static unsigned short	encode_half (double val)
static double	decode_half (unsigned short half)
CborError	_cbor_value_extract_number (const uint8_t **ptr, const uint8_t *end, uint64_t *len)
CborError	_cbor_value_prepare_string_iteration (CborValue *it)
CborError	_cbor_value_get_string_chunk (const CborValue *value, const void **bufferptr, size_t *len, CborValue *next)

Enumerations
enum	CborMajorTypes {   UnsignedIntegerType = 0U , NegativeIntegerType = 1U , ByteStringType = 2U , TextStringType = 3U ,   ArrayType = 4U , MapType = 5U , TagType = 6U , SimpleTypesType = 7U }
enum	CborSimpleTypes {   FalseValue = 20 , TrueValue = 21 , NullValue = 22 , UndefinedValue = 23 ,   SimpleTypeInNextByte = 24 , HalfPrecisionFloat = 25 , SinglePrecisionFloat = 26 , DoublePrecisionFloat = 27 ,   Break = 31 }
enum	{   SmallValueBitLength = 5U , SmallValueMask = (1U << SmallValueBitLength) - 1 , Value8Bit = 24U , Value16Bit = 25U ,   Value32Bit = 26U , Value64Bit = 27U , IndefiniteLength = 31U , MajorTypeShift = SmallValueBitLength ,   MajorTypeMask = (int) (~0U << MajorTypeShift) , BreakByte = (unsigned)Break | (SimpleTypesType << MajorTypeShift) }

Macros
#define	CBOR_INTERNAL_API
#define	CBOR_PARSER_MAX_RECURSIONS   1024

Function Documentation

_cbor_value_extract_number()

CborError _cbor_value_extract_number	(	const uint8_t **	ptr,
		const uint8_t *	end,
		uint64_t *	len
	)

_cbor_value_get_string_chunk()

CborError _cbor_value_get_string_chunk	(	const CborValue *	value,
		const void **	bufferptr,
		size_t *	len,
		CborValue *	next
	)

_cbor_value_prepare_string_iteration()

CborError _cbor_value_prepare_string_iteration

(

CborValue *

it

)

decode_half()

static double decode_half ( unsigned short  half )

static

Definition at line 86 of file cborinternal_p.h.

{
    int exp = (half >> 10) & 0x1f;
    int mant = half & 0x3ff;
    double val;
    if (exp == 0) val = ldexp(mant, -24);
    else if (exp != 31) val = ldexp(mant + 1024, exp - 25);
    else val = mant == 0 ? INFINITY : NAN;
    return half & 0x8000 ? -val : val;
}

encode_half()

static unsigned short encode_half ( double  val )

static

Definition at line 52 of file cborinternal_p.h.

{
    uint64_t v;
    int sign, exp, mant;
    memcpy(&v, &val, sizeof(v));
    sign = v >> 63 << 15;
    exp = (v >> 52) & 0x7ff;
    mant = v << 12 >> 12 >> (53-11);    /* keep only the 11 most significant bits of the mantissa */
    exp -= 1023;
    if (exp == 1024) {
        /* infinity or NaN */
        exp = 16;
        mant >>= 1;
    } else if (exp >= 16) {
        /* overflow, as largest number */
        exp = 15;
        mant = 1023;
    } else if (exp >= -14) {
        /* regular normal */
    } else if (exp >= -24) {
        /* subnormal */
        mant |= 1024;
        mant >>= -(exp + 14);
        exp = -15;
    } else {
        /* underflow, make zero */
        return 0;
    }
 
    /* safe cast here as bit operations above guarantee not to overflow */
    return (unsigned short)(sign | ((exp + 15) << 10) | mant);
}

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
SmallValueBitLength
SmallValueMask
Value8Bit
Value16Bit
Value32Bit
Value64Bit
IndefiniteLength
MajorTypeShift
MajorTypeMask
BreakByte

Definition at line 140 of file cborinternal_p.h.

     {
    SmallValueBitLength     = 5U,
    SmallValueMask          = (1U << SmallValueBitLength) - 1,      /* 31 */
    Value8Bit               = 24U,
    Value16Bit              = 25U,
    Value32Bit              = 26U,
    Value64Bit              = 27U,
    IndefiniteLength        = 31U,
 
    MajorTypeShift          = SmallValueBitLength,
    MajorTypeMask           = (int) (~0U << MajorTypeShift),
 
    BreakByte               = (unsigned)Break | (SimpleTypesType << MajorTypeShift)
};

CborMajorTypes

enum CborMajorTypes

Enumerator
UnsignedIntegerType
NegativeIntegerType
ByteStringType
TextStringType
ArrayType
MapType
TagType
SimpleTypesType

Definition at line 112 of file cborinternal_p.h.

                            {
    UnsignedIntegerType = 0U,
    NegativeIntegerType = 1U,
    ByteStringType = 2U,
    TextStringType = 3U,
    ArrayType = 4U,
    MapType = 5U,           /* a.k.a. object */
    TagType = 6U,
    SimpleTypesType = 7U
} CborMajorTypes;

CborSimpleTypes

enum CborSimpleTypes

Enumerator
FalseValue
TrueValue
NullValue
UndefinedValue
SimpleTypeInNextByte
HalfPrecisionFloat
SinglePrecisionFloat
DoublePrecisionFloat
Break

Definition at line 128 of file cborinternal_p.h.

                             {
    FalseValue              = 20,
    TrueValue               = 21,
    NullValue               = 22,
    UndefinedValue          = 23,
    SimpleTypeInNextByte    = 24,   /* not really a simple type */
    HalfPrecisionFloat      = 25,   /* ditto */
    SinglePrecisionFloat    = 26,   /* ditto */
    DoublePrecisionFloat    = 27,   /* ditto */
    Break                   = 31
} CborSimpleTypes;

Macro Definition Documentation

CBOR_INTERNAL_API

#define CBOR_INTERNAL_API

Definition at line 100 of file cborinternal_p.h.

CBOR_PARSER_MAX_RECURSIONS

#define CBOR_PARSER_MAX_RECURSIONS   1024

Definition at line 104 of file cborinternal_p.h.