Inside Bitcoin

1// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file. See the AUTHORS file for names of contributors.
4
5#include "leveldb/status.h"
6
7#include <stdio.h>
8
9#include "port/port.h"
10
11namespace leveldb {
12
13const char* Status::CopyState(const char* state) {
14  uint32_t size;
15  memcpy(&size, state, sizeof(size));
16  char* result = new char[size + 5];
17  memcpy(result, state, size + 5);
18  return result;
19}
20
21Status::Status(Code code, const Slice& msg, const Slice& msg2) {
22  assert(code != kOk);
23  const uint32_t len1 = static_cast<uint32_t>(msg.size());
24  const uint32_t len2 = static_cast<uint32_t>(msg2.size());
25  const uint32_t size = len1 + (len2 ? (2 + len2) : 0);
26  char* result = new char[size + 5];
27  memcpy(result, &size, sizeof(size));
28  result[4] = static_cast<char>(code);
29  memcpy(result + 5, msg.data(), len1);
30  if (len2) {
31    result[5 + len1] = ':';
32    result[6 + len1] = ' ';
33    memcpy(result + 7 + len1, msg2.data(), len2);
34  }
35  state_ = result;
36}
37
38std::string Status::ToString() const {
39  if (state_ == nullptr) {
40    return "OK";
41  } else {
42    char tmp[30];
43    const char* type;
44    switch (code()) {
45      case kOk:
46        type = "OK";
47        break;
48      case kNotFound:
49        type = "NotFound: ";
50        break;
51      case kCorruption:
52        type = "Corruption: ";
53        break;
54      case kNotSupported:
55        type = "Not implemented: ";
56        break;
57      case kInvalidArgument:
58        type = "Invalid argument: ";
59        break;
60      case kIOError:
61        type = "IO error: ";
62        break;
63      default:
64        snprintf(tmp, sizeof(tmp),
65                 "Unknown code(%d): ", static_cast<int>(code()));
66        type = tmp;
67        break;
68    }
69    std::string result(type);
70    uint32_t length;
71    memcpy(&length, state_, sizeof(length));
72    result.append(state_ + 5, length);
73    return result;
74  }
75}
76
77}  // namespace leveldb
78