Add Steam app finder, fix missing blender cube bug

2025-12-09 00:27:42 +00:00 · 2017-07-22 23:20:28 -10:00
parent 1fd94a59fc
commit 14277fa386
5 changed files with 157 additions and 9 deletions
--- a/hecl/lib/SteamFinder.cpp
+++ b/hecl/lib/SteamFinder.cpp
@@ -0,0 +1,108 @@
+#include "hecl/SteamFinder.hpp"
+#include "hecl/hecl.hpp"
+#ifdef WIN32
+#include <winreg.h>
+#define PATH_SEP L'\\'
+#else
+#define PATH_SEP '/'
+#endif
+
+namespace hecl
+{
+
+/* Used to extract alternate steam install directories from libraryfolders.vdf */
+static const std::regex regSteamPath("^\\s+\\\"[0-9]+\\\"\\s+\\\"(.*)\\\"",
+                                     std::regex::ECMAScript|std::regex::optimize);
+
+hecl::SystemString FindCommonSteamApp(const hecl::SystemChar* name)
+{
+    hecl::SystemString steamInstallDir;
+    hecl::Sstat theStat;
+
+#ifdef WIN32
+    HKEY hkey;
+    hecl::SystemChar _steamInstallDir[MAX_PATH] = {0};
+    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _S("Software\\Valve\\Steam"),
+                     0, KEY_QUERY_VALUE, &hkey) != ERROR_SUCCESS)
+    {
+        if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _S("Software\\Valve\\Steam"),
+                         0, KEY_QUERY_VALUE | KEY_WOW64_32KEY, &hkey) != ERROR_SUCCESS)
+            return {};
+    }
+
+    DWORD size = MAX_PATH;
+    if (RegQueryValueEx(hkey, _S("InstallPath"), nullptr, nullptr,
+                        (LPBYTE)_steamInstallDir, &size) == ERROR_SUCCESS)
+        steamInstallDir = _steamInstallDir;
+    RegCloseKey(hkey);
+
+    if (steamInstallDir.empty())
+        return {};
+
+#elif defined(__APPLE__)
+    steamInstallDir = getenv("HOME");
+    steamInstallDir += "/Library/Application Support/Steam";
+    if (hecl::Stat(steamInstallDir.c_str(), &theStat) || !S_ISDIR(theStat.st_mode))
+        return {};
+
+#else
+    steamInstallDir = getenv("HOME");
+    steamInstallDir += "/.local/share/Steam";
+    if (hecl::Stat(steamInstallDir.c_str(), &theStat) || !S_ISDIR(theStat.st_mode))
+    {
+        steamInstallDir = getenv("HOME");
+        steamInstallDir += "/.steam/steam";
+        if (hecl::Stat(steamInstallDir.c_str(), &theStat) || !S_ISDIR(theStat.st_mode))
+            return {};
+    }
+
+#endif
+
+    hecl::SystemString appPath = hecl::SystemString(_S("common")) + PATH_SEP + name;
+
+    /* Try main steam install directory first */
+    hecl::SystemString steamAppsMain = steamInstallDir + PATH_SEP + _S("steamapps");
+    hecl::SystemString mainAppPath = steamAppsMain + PATH_SEP + appPath;
+    if (!hecl::Stat(mainAppPath.c_str(), &theStat) && S_ISDIR(theStat.st_mode))
+        return mainAppPath;
+
+    /* Iterate alternate steam install dirs */
+    hecl::SystemString libraryFoldersVdfPath = steamAppsMain + PATH_SEP + _S("libraryfolders.vdf");
+    FILE* fp = hecl::Fopen(libraryFoldersVdfPath.c_str(), _S("r"));
+    if (!fp)
+        return {};
+    hecl::FSeek(fp, 0, SEEK_END);
+    int64_t fileLen = hecl::FTell(fp);
+    if (fileLen <= 0)
+    {
+        fclose(fp);
+        return {};
+    }
+    hecl::FSeek(fp, 0, SEEK_SET);
+    std::string fileBuf;
+    fileBuf.resize(fileLen);
+    if (fread(&fileBuf[0], 1, fileLen, fp) != fileLen)
+    {
+        fclose(fp);
+        return {};
+    }
+    fclose(fp);
+
+    std::smatch dirMatch;
+    auto begin = fileBuf.cbegin();
+    auto end = fileBuf.cend();
+    while (std::regex_search(begin, end, dirMatch, regSteamPath))
+    {
+        std::string match = dirMatch[1].str();
+        hecl::SystemStringView otherInstallDir(match);
+        hecl::SystemString otherAppPath = otherInstallDir.sys_str() + PATH_SEP +
+            _S("steamapps") + PATH_SEP + appPath;
+        if (!hecl::Stat(otherAppPath.c_str(), &theStat) && S_ISDIR(theStat.st_mode))
+            return otherAppPath;
+        begin = dirMatch.suffix().first;
+    }
+
+    return {};
+}
+
+}