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annotate src/util/win32.cc @ 19:6596be6917a1

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dep/animone: prepare for v1.0 release; it should be ready by now
author Paper <paper@paper.us.eu.org>
date Tue, 11 Jun 2024 04:38:51 -0400
parents 27b988a1048c
children 973734ebd2be
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19
6596be6917a1 dep/animone: prepare for v1.0 release; it should be ready by now
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1 /*
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2 * util/win32.cc: utility functions only useful on windows
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3 */
14
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4 #include "animone/util/win32.h"
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5
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6 #include <shlobj.h> /* SHGetKnownFolderPath */
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7 #include <subauth.h> /* UNICODE_STRING */
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8 #include <windows.h>
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9
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10 namespace animone::internal::win32 {
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11
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12 std::string ToUtf8String(const std::wstring& string) {
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13 if (string.empty())
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14 return std::string();
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15
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16 long size = ::WideCharToMultiByte(CP_UTF8, 0, string.c_str(), string.length(), nullptr, 0, nullptr, nullptr);
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17 std::string ret(size, '\0');
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18 ::WideCharToMultiByte(CP_UTF8, 0, string.c_str(), string.length(), &ret.front(), ret.length(), nullptr, nullptr);
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19 return ret;
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20 }
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21
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22 std::string ToUtf8String(const UNICODE_STRING& string) {
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23 const auto wctomb = [&string](LPSTR out, int size) -> int {
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24 return ::WideCharToMultiByte(CP_UTF8, 0, string.Buffer, string.Length, out, size, nullptr, nullptr);
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25 };
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26
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27 if (string.Length <= 0)
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28 return std::string();
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29
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30 long size = wctomb(nullptr, 0);
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31 std::string ret(size, '\0');
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32 wctomb(&ret.front(), ret.length());
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33 return ret;
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34 }
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35
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36 std::wstring ToWstring(const std::string& string) {
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37 const auto mbtowc = [&string](LPWSTR out, int size) -> int {
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38 return ::MultiByteToWideChar(CP_UTF8, 0, string.c_str(), string.length(), out, size);
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39 };
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40
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41 if (string.empty())
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42 return std::wstring();
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43
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44 long size = mbtowc(nullptr, 0);
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45 std::wstring ret(size, L'\0');
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46 mbtowc(&ret.front(), ret.length());
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47 return ret;
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48 }
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49
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50 std::wstring GetProcessPath(DWORD process_id) {
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51 // If we try to open a SYSTEM process, this function fails and the last error
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52 // code is ERROR_ACCESS_DENIED.
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53 //
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54 // Note that if we requested PROCESS_QUERY_INFORMATION access right instead
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55 // of PROCESS_QUERY_LIMITED_INFORMATION, this function would fail when used
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56 // to open an elevated process.
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57 Handle process_handle(::OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, process_id));
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58
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59 if (!process_handle)
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60 return std::wstring();
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61
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62 std::wstring buffer(MAX_PATH, L'\0');
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63 DWORD buf_size = buffer.length();
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64
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65 // Note that this function requires Windows Vista or above. You may use
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66 // GetProcessImageFileName or GetModuleFileNameEx on earlier versions.
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67 if (!::QueryFullProcessImageNameW(process_handle.get(), 0, &buffer.front(), &buf_size))
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68 return std::wstring();
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69
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70 buffer.resize(buf_size);
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71 return buffer;
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72 }
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73
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74 std::wstring GetFileNameFromPath(const std::wstring& path) {
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75 const auto pos = path.find_last_of(L"/\\");
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76 return pos != std::wstring::npos ? path.substr(pos + 1) : path;
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77 }
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78
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79 std::wstring GetFileNameWithoutExtension(const std::wstring& filename) {
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80 const auto pos = filename.find_last_of(L".");
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81 return pos != std::wstring::npos ? filename.substr(0, pos) : filename;
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82 }
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83
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84 static std::wstring GetSystemDirectory() {
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85 PWSTR path_wch;
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86 SHGetKnownFolderPath(FOLDERID_Windows, 0, NULL, &path_wch);
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87 std::wstring path_wstr(path_wch);
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88 CoTaskMemFree(path_wch);
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89 return path_wstr;
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90 }
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91
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92 bool IsSystemDirectory(const std::string& path) {
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93 return IsSystemDirectory(ToWstring(path));
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94 }
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95
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96 bool IsSystemDirectory(std::wstring path) {
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97 ::CharUpperBuffW(&path.front(), path.length());
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98
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99 std::wstring windir = GetSystemDirectory();
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100 ::CharUpperBuffW(&windir.front(), windir.length());
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101
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102 return path.find(windir) == 4;
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103 }
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104
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105 } // namespace animone::internal::win32