datastream.h File Reference

#include "platform/assert.h"
#include "platform/utils.h"
#include "vm/allocation.h"
#include "vm/exceptions.h"
#include "vm/globals.h"
#include "vm/os.h"
#include "vm/zone.h"

Go to the source code of this file.

Classes
struct	dart::LEB128Constants
class	dart::ReadStream
class	dart::ReadStream::Raw< N, T >
class	dart::ReadStream::Raw< 1, T >
class	dart::ReadStream::Raw< 2, T >
class	dart::ReadStream::Raw< 4, T >
class	dart::ReadStream::Raw< 8, T >
class	dart::BaseWriteStream
class	dart::BaseWriteStream::Raw< N, T >
class	dart::BaseWriteStream::Raw< 1, T >
class	dart::BaseWriteStream::Raw< 2, T >
class	dart::BaseWriteStream::Raw< 4, T >
class	dart::BaseWriteStream::Raw< 8, T >
class	dart::NonStreamingWriteStream
class	dart::MallocWriteStream
class	dart::ZoneWriteStream
class	dart::StreamingWriteStream

Namespaces
namespace	dart

Macros
#define	STAGE
#define	UNROLLED_INIT()
#define	UNROLLED_BODY(bit_start)
#define	UNROLLED_END(bit_start)

Variables
static constexpr int8_t	dart::kDataBitsPerByte = 7
static constexpr int8_t	dart::kByteMask = (1 << kDataBitsPerByte) - 1
static constexpr int8_t	dart::kMaxUnsignedDataPerByte = kByteMask
static constexpr int8_t	dart::kMinDataPerByte = -(1 << (kDataBitsPerByte - 1))
static constexpr int8_t	dart::kMaxDataPerByte
static constexpr uint8_t	dart::kEndByteMarker = (255 - kMaxDataPerByte)
static constexpr uint8_t	dart::kEndUnsignedByteMarker

Macro Definition Documentation

STAGE

#define STAGE

Value:

    byte = *cursor++;              /* ldrsb byte, [result], 1  */              \
    result = byte + (result << 7); /* add result, byte, result lsl 7 */        \
    if (byte < 0) goto done;       /* tbnz byte, 63, done */

UNROLLED_BODY

#define UNROLLED_BODY

(

bit_start

)

Value:

  static_assert(bit_start % kDataBitsPerByte == 0,                             \
                "Bit start must be a multiple of the data bits per byte");     \
  static_assert(bit_start >= 0 && bit_start < kBitsPerByte * sizeof(T),        \
                "Starting unrolled body at invalid bit position");             \
  static_assert(bit_start + kDataBitsPerByte < kBitsPerByte * sizeof(T),       \
                "Unrolled body should not contain final bits in value");       \
  b = ReadByte();                                                              \
  if (b > kMaxUnsignedDataPerByte) {                                           \
    return r | (static_cast<T>(b - end_byte_marker) << bit_start);             \
  }                                                                            \
  r |= b << bit_start;

Definition at line 258 of file datastream.h.

                                   {                                           \
    return r | (static_cast<T>(b - end_byte_marker) << bit_start);             \
  }                                                                            \
  r |= b << bit_start;

UNROLLED_END

#define UNROLLED_END

(

bit_start

)

Value:

  static_assert(bit_start % kDataBitsPerByte == 0,                             \
                "Bit start must be a multiple of the data bits per byte");     \
  static_assert(bit_start >= 0 && bit_start < kBitsPerByte * sizeof(T),        \
                "Starting unrolled end at invalid bit position");              \
  static_assert(bit_start + kDataBitsPerByte >= kBitsPerByte * sizeof(T),      \
                "Unrolled end does not contain final bits in value");          \
  b = ReadByte();                                                              \
  ASSERT(b > kMaxUnsignedDataPerByte);                                         \
  return r | (static_cast<T>(b - end_byte_marker) << bit_start);

Definition at line 272 of file datastream.h.

UNROLLED_INIT

#define UNROLLED_INIT

(

)

Value:

  using Unsigned = typename std::make_unsigned<T>::type;                       \
  Unsigned b = ReadByte();                                                     \
  if (b > kMaxUnsignedDataPerByte) {                                           \
    return b - end_byte_marker;                                                \
  }                                                                            \
  T r = b;

Definition at line 248 of file datastream.h.

                                   {                                           \
    return b - end_byte_marker;                                                \
  }                                                                            \
  T r = b;