Sfall: add support for loading mods / mod_order.txt

CMakeLists.txt

@@ -267,6 +267,8 @@ target_sources(${EXECUTABLE_NAME} PUBLIC
     "src/settings.h"
     "src/sfall_config.cc"
     "src/sfall_config.h"
+    "src/sfall_ext.cc"
+    "src/sfall_ext.h"
     "src/sfall_global_vars.cc"
     "src/sfall_global_vars.h"
     "src/sfall_global_scripts.cc"

src/game.cc

@@ -52,6 +52,7 @@
 #include "settings.h"
 #include "sfall_arrays.h"
 #include "sfall_config.h"
+#include "sfall_ext.h"
 #include "sfall_global_scripts.h"
 #include "sfall_global_vars.h"
 #include "sfall_ini.h"
@@ -1378,6 +1379,8 @@ static int gameDbInit()
         }
     }
 
+    sfallLoadMods();
+
     if (compat_access("f2_res.dat", 0) == 0) {
         dbOpen("f2_res.dat", 0, nullptr, 1);
     }

src/sfall_ext.cc

@@ -0,0 +1,85 @@
+#include "sfall_ext.h"
+
+#include <algorithm>
+#include <string>
+
+#include "db.h"
+#include "debug.h"
+#include "platform_compat.h"
+
+namespace fallout {
+
+/**
+ * Load mods from the mod directory
+ */
+void sfallLoadMods()
+{
+    // SFALL: additional mods from the mods directory / mods_order.txt
+    const char* modsPath = "mods";
+    const char* loadOrderFilename = "mods_order.txt";
+
+    char loadOrderFilepath[COMPAT_MAX_PATH];
+    compat_makepath(loadOrderFilepath, nullptr, modsPath, loadOrderFilename, nullptr);
+
+    // If the mods folder does not exist, create it.
+    compat_mkdir(modsPath);
+
+    // If load order file does not exist, initialize it automatically with mods already in the mods folder.
+    if (compat_access(loadOrderFilepath, 0) != 0) {
+        debugPrint("Generating Mods Order file based on the contents of Mods folder: %s\n", loadOrderFilepath);
+
+        File* stream = fileOpen(loadOrderFilepath, "wt");
+        if (stream != nullptr) {
+            char** fileList;
+            int fileListLength = fileNameListInit("mods\\*.dat", &fileList, 0, 0);
+
+            for (int index = 0; index < fileListLength; index++) {
+                fileWriteString(fileList[index], stream);
+                fileWriteString("\n", stream);
+            }
+            fileClose(stream);
+            fileNameListFree(&fileList, 0);
+        }
+    }
+
+    // Add mods from load order file.
+    File* stream = fileOpen(loadOrderFilepath, "r");
+    if (stream != nullptr) {
+        char mod[COMPAT_MAX_PATH];
+        while (fileReadString(mod, COMPAT_MAX_PATH, stream)) {
+            std::string modPath { mod };
+
+            if (modPath.find_first_of(";#") != std::string::npos)
+                continue; // skip comments
+
+            // ltrim
+            modPath.erase(modPath.begin(), std::find_if(modPath.begin(), modPath.end(), [](unsigned char ch) {
+                return !isspace(ch);
+            }));
+
+            // rtrim
+            modPath.erase(std::find_if(modPath.rbegin(), modPath.rend(), [](unsigned char ch) {
+                return !isspace(ch);
+            }).base(),
+                modPath.end());
+
+            if (modPath.empty())
+                continue; // skip empty lines
+
+            char normalizedModPath[COMPAT_MAX_PATH];
+            compat_makepath(normalizedModPath, nullptr, modsPath, modPath.c_str(), nullptr);
+
+            if (compat_access(normalizedModPath, 0) == 0) {
+                debugPrint("Loading mod %s\n", normalizedModPath);
+                dbOpen(normalizedModPath, 0, nullptr, 1);
+            } else {
+                debugPrint("Skipping invalid mod entry %s in %s\n", normalizedModPath, loadOrderFilepath);
+            }
+        }
+        fileClose(stream);
+    } else {
+        debugPrint("Error opening %s for read\n", loadOrderFilepath);
+    }
+}
+
+} // namespace fallout

src/sfall_ext.h

@@ -0,0 +1,10 @@
+#ifndef SFALL_EXT_H
+#define SFALL_EXT_H
+
+namespace fallout {
+
+void sfallLoadMods();
+
+} // namespace fallout
+
+#endif /* SFALL_EXT_H */