From def5c50960eea4c112647f88361a3ae7155901a8 Mon Sep 17 00:00:00 2001 From: egor-tensin Date: Tue, 4 Jul 2023 00:48:00 +0000 Subject: =?UTF-8?q?Deploying=20to=20gh-pages=20from=20@=20egor-tensin/wina?= =?UTF-8?q?pi-common@0c196cbe8b4927c78c02b2c7312fc69a507db845=20?= =?UTF-8?q?=F0=9F=9A=80?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- error_8cpp_source.html | 148 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 error_8cpp_source.html (limited to 'error_8cpp_source.html') diff --git a/error_8cpp_source.html b/error_8cpp_source.html new file mode 100644 index 0000000..7ab038d --- /dev/null +++ b/error_8cpp_source.html @@ -0,0 +1,148 @@ + + + + + + + +winapi_common: src/error.cpp Source File + + + + + + + + + +
+
+ + + + + + +
+
winapi_common +
+
+
+ + + + + + + + +
+
+ + +
+ +
+ + +
+
+
+
error.cpp
+
+
+
1 // Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
+
2 // This file is part of the "winapi-common" project.
+
3 // For details, see https://github.com/egor-tensin/winapi-common.
+
4 // Distributed under the MIT License.
+
5 
+
6 #include <winapi/error.hpp>
+
7 #include <winapi/utf8.hpp>
+
8 
+
9 #include <windows.h>
+
10 
+
11 #include <cstdint>
+
12 #include <sstream>
+
13 #include <string>
+
14 #include <system_error>
+
15 
+
16 namespace winapi {
+
17 namespace error {
+
18 namespace {
+
19 
+
20 std::wstring trim_trailing_newline(const std::wstring& s) {
+
21  const auto last_pos = s.find_last_not_of(L"\r\n");
+
22  if (std::wstring::npos == last_pos)
+
23  return {};
+
24  return s.substr(0, last_pos + 1);
+
25 }
+
26 
+
27 std::string build_what(DWORD code, const char* function) {
+
28  std::ostringstream what;
+
29  what << "Function " << function << " failed with error code " << code;
+
30  return what.str();
+
31 }
+
32 
+
33 std::string format_message(int32_t code) {
+
34  wchar_t* buf;
+
35 
+
36  const auto len = ::FormatMessageW(
+
37  FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+
38  NULL,
+
39  code,
+
40  MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+
41  reinterpret_cast<wchar_t*>(&buf),
+
42  0,
+
43  NULL);
+
44 
+
45  if (0 == len) {
+
46  ::LocalFree(buf);
+
47  return "Couldn't format the error message";
+
48  }
+
49 
+
50  std::wstring msg{buf, len};
+
51  ::LocalFree(buf);
+
52  return narrow(trim_trailing_newline(msg));
+
53 }
+
54 
+
55 } // namespace
+
56 
+
57 std::string CategoryWindows::message(int32_t code) const {
+
58  return format_message(code);
+
59 }
+
60 
+
61 std::system_error windows(DWORD code, const char* function) {
+
62  static_assert(sizeof(DWORD) == sizeof(int32_t), "Aren't DWORDs the same size as ints?");
+
63  return std::system_error{
+
64  static_cast<int32_t>(code), category_windows(), build_what(code, function)};
+
65 }
+
66 
+
67 } // namespace error
+
68 } // namespace winapi
+
error.hpp
Make std::system_error work with GetLastError().
+
winapi::error::windows
std::system_error windows(DWORD code, const char *function)
Definition: error.cpp:61
+
+ +
+Generated by doxygen 1.9.1 +
+ + -- cgit v1.2.3