1// Copyright (c) 2006, Google Inc.
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met:
7//
8//     * Redistributions of source code must retain the above copyright
9// notice, this list of conditions and the following disclaimer.
10//     * Redistributions in binary form must reproduce the above
11// copyright notice, this list of conditions and the following disclaimer
12// in the documentation and/or other materials provided with the
13// distribution.
14//     * Neither the name of Google Inc. nor the names of its
15// contributors may be used to endorse or promote products derived from
16// this software without specific prior written permission.
17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30#include <cassert>
31#include <vector>
32
33#include "common/windows/string_utils-inl.h"
34
35namespace google_breakpad {
36
37// static
38wstring WindowsStringUtils::GetBaseName(const wstring &filename) {
39  wstring base_name(filename);
40  size_t slash_pos = base_name.find_last_of(L"/\\");
41  if (slash_pos != wstring::npos) {
42    base_name.erase(0, slash_pos + 1);
43  }
44  return base_name;
45}
46
47// static
48bool WindowsStringUtils::safe_mbstowcs(const string &mbs, wstring *wcs) {
49  assert(wcs);
50
51  // First, determine the length of the destination buffer.
52  size_t wcs_length;
53
54#if _MSC_VER >= 1400  // MSVC 2005/8
55  errno_t err;
56  if ((err = mbstowcs_s(&wcs_length, NULL, 0, mbs.c_str(), _TRUNCATE)) != 0) {
57    return false;
58  }
59  assert(wcs_length > 0);
60#else  // _MSC_VER >= 1400
61  if ((wcs_length = mbstowcs(NULL, mbs.c_str(), mbs.length())) == (size_t)-1) {
62    return false;
63  }
64
65  // Leave space for the 0-terminator.
66  ++wcs_length;
67#endif  // _MSC_VER >= 1400
68
69  std::vector<wchar_t> wcs_v(wcs_length);
70
71  // Now, convert.
72#if _MSC_VER >= 1400  // MSVC 2005/8
73  if ((err = mbstowcs_s(NULL, &wcs_v[0], wcs_length, mbs.c_str(),
74                        _TRUNCATE)) != 0) {
75    return false;
76  }
77#else  // _MSC_VER >= 1400
78  if (mbstowcs(&wcs_v[0], mbs.c_str(), mbs.length()) == (size_t)-1) {
79    return false;
80  }
81
82  // Ensure presence of 0-terminator.
83  wcs_v[wcs_length - 1] = '\0';
84#endif  // _MSC_VER >= 1400
85
86  *wcs = &wcs_v[0];
87  return true;
88}
89
90// static
91bool WindowsStringUtils::safe_wcstombs(const wstring &wcs, string *mbs) {
92  assert(mbs);
93
94  // First, determine the length of the destination buffer.
95  size_t mbs_length;
96
97#if _MSC_VER >= 1400  // MSVC 2005/8
98  errno_t err;
99  if ((err = wcstombs_s(&mbs_length, NULL, 0, wcs.c_str(), _TRUNCATE)) != 0) {
100    return false;
101  }
102  assert(mbs_length > 0);
103#else  // _MSC_VER >= 1400
104  if ((mbs_length = wcstombs(NULL, wcs.c_str(), wcs.length())) == (size_t)-1) {
105    return false;
106  }
107
108  // Leave space for the 0-terminator.
109  ++mbs_length;
110#endif  // _MSC_VER >= 1400
111
112  std::vector<char> mbs_v(mbs_length);
113
114  // Now, convert.
115#if _MSC_VER >= 1400  // MSVC 2005/8
116  if ((err = wcstombs_s(NULL, &mbs_v[0], mbs_length, wcs.c_str(),
117                        _TRUNCATE)) != 0) {
118    return false;
119  }
120#else  // _MSC_VER >= 1400
121  if (wcstombs(&mbs_v[0], wcs.c_str(), wcs.length()) == (size_t)-1) {
122    return false;
123  }
124
125  // Ensure presence of 0-terminator.
126  mbs_v[mbs_length - 1] = '\0';
127#endif  // _MSC_VER >= 1400
128
129  *mbs = &mbs_v[0];
130  return true;
131}
132
133}  // namespace google_breakpad
134