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75 regels
1.9 KiB
75 regels
1.9 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include <stdio.h>
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#include "port/port.h"
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#include "leveldb/status.h"
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namespace leveldb {
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const char* Status::CopyState(const char* state) {
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uint32_t size;
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memcpy(&size, state, sizeof(size));
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char* result = new char[size + 5];
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memcpy(result, state, size + 5);
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return result;
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}
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Status::Status(Code code, const Slice& msg, const Slice& msg2) {
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assert(code != kOk);
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const uint32_t len1 = msg.size();
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const uint32_t len2 = msg2.size();
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const uint32_t size = len1 + (len2 ? (2 + len2) : 0);
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char* result = new char[size + 5];
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memcpy(result, &size, sizeof(size));
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result[4] = static_cast<char>(code);
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memcpy(result + 5, msg.data(), len1);
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if (len2) {
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result[5 + len1] = ':';
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result[6 + len1] = ' ';
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memcpy(result + 7 + len1, msg2.data(), len2);
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}
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state_ = result;
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}
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std::string Status::ToString() const {
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if (state_ == NULL) {
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return "OK";
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} else {
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char tmp[30];
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const char* type;
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switch (code()) {
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case kOk:
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type = "OK";
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break;
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case kNotFound:
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type = "NotFound: ";
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break;
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case kCorruption:
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type = "Corruption: ";
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break;
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case kNotSupported:
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type = "Not implemented: ";
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break;
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case kInvalidArgument:
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type = "Invalid argument: ";
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break;
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case kIOError:
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type = "IO error: ";
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break;
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default:
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snprintf(tmp, sizeof(tmp), "Unknown code(%d): ",
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static_cast<int>(code()));
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type = tmp;
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break;
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}
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std::string result(type);
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uint32_t length;
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memcpy(&length, state_, sizeof(length));
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result.append(state_ + 5, length);
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return result;
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}
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}
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} // namespace leveldb
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