leveldb::Status Class Reference

#include <status.h>

Public Member Functions
	Status ()
	~Status ()
	Status (const Status &s)
void	operator= (const Status &s)
bool	ok () const
bool	IsNotFound () const
bool	IsCorruption () const
bool	IsIOError () const
bool	IsNotSupportedError () const
bool	IsInvalidArgument () const
std::string	ToString () const

Static Public Member Functions
static Status	OK ()
static Status	NotFound (const Slice &msg, const Slice &msg2=Slice())
static Status	Corruption (const Slice &msg, const Slice &msg2=Slice())
static Status	NotSupported (const Slice &msg, const Slice &msg2=Slice())
static Status	InvalidArgument (const Slice &msg, const Slice &msg2=Slice())
static Status	IOError (const Slice &msg, const Slice &msg2=Slice())

Private Types
enum	Code {   kOk = 0, kNotFound = 1, kCorruption = 2, kNotSupported = 3,   kInvalidArgument = 4, kIOError = 5 }

Private Member Functions
Code	code () const
	Status (Code code, const Slice &msg, const Slice &msg2)

Static Private Member Functions
static const char *	CopyState (const char *s)

Private Attributes
const char *	state_

Detailed Description

Definition at line 21 of file status.h.

Member Enumeration Documentation

Code

enum leveldb::Status::Code

private

Enumerator
kOk
kNotFound
kCorruption
kNotSupported
kInvalidArgument
kIOError

Definition at line 81 of file status.h.

            {
    kOk = 0,
    kNotFound = 1,
    kCorruption = 2,
    kNotSupported = 3,
    kInvalidArgument = 4,
    kIOError = 5
  };

Constructor & Destructor Documentation

Status() [1/3]

leveldb::Status::Status ( )

inline

Definition at line 24 of file status.h.

: state_(NULL) { }

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~Status()

leveldb::Status::~Status ( )

inline

Definition at line 25 of file status.h.

{ delete[] state_; }

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Status() [2/3]

leveldb::Status::Status ( const Status &  s )

inline

Definition at line 98 of file status.h.

                                     {
  state_ = (s.state_ == NULL) ? NULL : CopyState(s.state_);
}

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Status() [3/3]

leveldb::Status::Status ( Code  code, const Slice &  msg, const Slice &  msg2  )

private

Definition at line 19 of file status.cc.

                                                             {
  assert(code != kOk);
  const uint32_t len1 = msg.size();
  const uint32_t len2 = msg2.size();
  const uint32_t size = len1 + (len2 ? (2 + len2) : 0);
  char* result = new char[size + 5];
  memcpy(result, &size, sizeof(size));
  result[4] = static_cast<char>(code);
  memcpy(result + 5, msg.data(), len1);
  if (len2) {
    result[5 + len1] = ':';
    result[6 + len1] = ' ';
    memcpy(result + 7 + len1, msg2.data(), len2);
  }
  state_ = result;
}

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Member Function Documentation

code()

Code leveldb::Status::code ( ) const

inlineprivate

Definition at line 90 of file status.h.

                    {
    return (state_ == NULL) ? kOk : static_cast<Code>(state_[4]);
  }

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CopyState()

const char * leveldb::Status::CopyState ( const char *  s )

staticprivate

Definition at line 11 of file status.cc.

                                               {
  uint32_t size;
  memcpy(&size, state, sizeof(size));
  char* result = new char[size + 5];
  memcpy(result, state, size + 5);
  return result;
}

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Corruption()

static Status leveldb::Status::Corruption ( const Slice &  msg, const Slice &  msg2 = Slice()  )

inlinestatic

Definition at line 38 of file status.h.

                                                                          {
    return Status(kCorruption, msg, msg2);
  }

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InvalidArgument()

static Status leveldb::Status::InvalidArgument ( const Slice &  msg, const Slice &  msg2 = Slice()  )

inlinestatic

Definition at line 44 of file status.h.

                                                                               {
    return Status(kInvalidArgument, msg, msg2);
  }

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IOError()

static Status leveldb::Status::IOError ( const Slice &  msg, const Slice &  msg2 = Slice()  )

inlinestatic

Definition at line 47 of file status.h.

                                                                       {
    return Status(kIOError, msg, msg2);
  }

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IsCorruption()

bool leveldb::Status::IsCorruption ( ) const

inline

Definition at line 58 of file status.h.

{ return code() == kCorruption; }

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IsInvalidArgument()

bool leveldb::Status::IsInvalidArgument ( ) const

inline

Definition at line 67 of file status.h.

{ return code() == kInvalidArgument; }

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IsIOError()

bool leveldb::Status::IsIOError ( ) const

inline

Definition at line 61 of file status.h.

{ return code() == kIOError; }

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IsNotFound()

bool leveldb::Status::IsNotFound ( ) const

inline

Definition at line 55 of file status.h.

{ return code() == kNotFound; }

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IsNotSupportedError()

bool leveldb::Status::IsNotSupportedError ( ) const

inline

Definition at line 64 of file status.h.

{ return code() == kNotSupported; }

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NotFound()

static Status leveldb::Status::NotFound ( const Slice &  msg, const Slice &  msg2 = Slice()  )

inlinestatic

Definition at line 35 of file status.h.

                                                                        {
    return Status(kNotFound, msg, msg2);
  }

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NotSupported()

static Status leveldb::Status::NotSupported ( const Slice &  msg, const Slice &  msg2 = Slice()  )

inlinestatic

Definition at line 41 of file status.h.

                                                                            {
    return Status(kNotSupported, msg, msg2);
  }

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OK()

static Status leveldb::Status::OK ( )

inlinestatic

Definition at line 32 of file status.h.

{ return Status(); }

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ok()

bool leveldb::Status::ok ( ) const

inline

Definition at line 52 of file status.h.

{ return (state_ == NULL); }

operator=()

void leveldb::Status::operator= ( const Status &  s )

inline

Definition at line 101 of file status.h.

                                             {
  // The following condition catches both aliasing (when this == &s),
  // and the common case where both s and *this are ok.
  if (state_ != s.state_) {
    delete[] state_;
    state_ = (s.state_ == NULL) ? NULL : CopyState(s.state_);
  }
}

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ToString()

std::string leveldb::Status::ToString

(

)

const

Definition at line 36 of file status.cc.

                                 {
  if (state_ == NULL) {
    return "OK";
  } else {
    char tmp[30];
    const char* type;
    switch (code()) {
      case kOk:
        type = "OK";
        break;
      case kNotFound:
        type = "NotFound: ";
        break;
      case kCorruption:
        type = "Corruption: ";
        break;
      case kNotSupported:
        type = "Not implemented: ";
        break;
      case kInvalidArgument:
        type = "Invalid argument: ";
        break;
      case kIOError:
        type = "IO error: ";
        break;
      default:
        snprintf(tmp, sizeof(tmp), "Unknown code(%d): ",
                 static_cast<int>(code()));
        type = tmp;
        break;
    }
    std::string result(type);
    uint32_t length;
    memcpy(&length, state_, sizeof(length));
    result.append(state_ + 5, length);
    return result;
  }
}

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Member Data Documentation

state_

const char* leveldb::Status::state_

private

Definition at line 79 of file status.h.

---

The documentation for this class was generated from the following files:

• include/leveldb/status.h
• util/status.cc