mirror of https://github.com/AxioDL/metaforce.git
109 lines
3.4 KiB
C++
109 lines
3.4 KiB
C++
#include "hecl/SteamFinder.hpp"
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#include "hecl/hecl.hpp"
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#ifdef WIN32
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#include <winreg.h>
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#define PATH_SEP L'\\'
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#else
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#define PATH_SEP '/'
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#endif
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namespace hecl
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{
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/* Used to extract alternate steam install directories from libraryfolders.vdf */
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static const std::regex regSteamPath(R"(^\s+\"[0-9]+\"\s+\"(.*)\")",
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std::regex::ECMAScript|std::regex::optimize);
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hecl::SystemString FindCommonSteamApp(const hecl::SystemChar* name)
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{
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hecl::SystemString steamInstallDir;
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hecl::Sstat theStat;
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#ifdef WIN32
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HKEY hkey;
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hecl::SystemChar _steamInstallDir[MAX_PATH] = {0};
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if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _S("Software\\Valve\\Steam"),
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0, KEY_QUERY_VALUE, &hkey) != ERROR_SUCCESS)
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{
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if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _S("Software\\Valve\\Steam"),
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0, KEY_QUERY_VALUE | KEY_WOW64_32KEY, &hkey) != ERROR_SUCCESS)
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return {};
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}
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DWORD size = MAX_PATH;
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if (RegQueryValueEx(hkey, _S("InstallPath"), nullptr, nullptr,
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(LPBYTE)_steamInstallDir, &size) == ERROR_SUCCESS)
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steamInstallDir = _steamInstallDir;
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RegCloseKey(hkey);
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if (steamInstallDir.empty())
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return {};
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#elif defined(__APPLE__)
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steamInstallDir = getenv("HOME");
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steamInstallDir += "/Library/Application Support/Steam";
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if (hecl::Stat(steamInstallDir.c_str(), &theStat) || !S_ISDIR(theStat.st_mode))
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return {};
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#else
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steamInstallDir = getenv("HOME");
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steamInstallDir += "/.local/share/Steam";
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if (hecl::Stat(steamInstallDir.c_str(), &theStat) || !S_ISDIR(theStat.st_mode))
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{
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steamInstallDir = getenv("HOME");
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steamInstallDir += "/.steam/steam";
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if (hecl::Stat(steamInstallDir.c_str(), &theStat) || !S_ISDIR(theStat.st_mode))
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return {};
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}
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#endif
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hecl::SystemString appPath = hecl::SystemString(_S("common")) + PATH_SEP + name;
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/* Try main steam install directory first */
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hecl::SystemString steamAppsMain = steamInstallDir + PATH_SEP + _S("steamapps");
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hecl::SystemString mainAppPath = steamAppsMain + PATH_SEP + appPath;
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if (!hecl::Stat(mainAppPath.c_str(), &theStat) && S_ISDIR(theStat.st_mode))
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return mainAppPath;
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/* Iterate alternate steam install dirs */
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hecl::SystemString libraryFoldersVdfPath = steamAppsMain + PATH_SEP + _S("libraryfolders.vdf");
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FILE* fp = hecl::Fopen(libraryFoldersVdfPath.c_str(), _S("r"));
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if (!fp)
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return {};
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hecl::FSeek(fp, 0, SEEK_END);
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int64_t fileLen = hecl::FTell(fp);
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if (fileLen <= 0)
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{
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fclose(fp);
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return {};
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}
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hecl::FSeek(fp, 0, SEEK_SET);
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std::string fileBuf;
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fileBuf.resize(fileLen);
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if (fread(&fileBuf[0], 1, fileLen, fp) != fileLen)
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{
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fclose(fp);
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return {};
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}
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fclose(fp);
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std::smatch dirMatch;
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auto begin = fileBuf.cbegin();
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auto end = fileBuf.cend();
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while (std::regex_search(begin, end, dirMatch, regSteamPath))
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{
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std::string match = dirMatch[1].str();
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hecl::SystemStringView otherInstallDir(match);
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hecl::SystemString otherAppPath = otherInstallDir.sys_str() + PATH_SEP +
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_S("steamapps") + PATH_SEP + appPath;
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if (!hecl::Stat(otherAppPath.c_str(), &theStat) && S_ISDIR(theStat.st_mode))
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return otherAppPath;
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begin = dirMatch.suffix().first;
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}
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return {};
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}
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}
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