1 files changed, 109 insertions, 0 deletions
diff --git a/src/common/library.h b/src/common/library.h
new file mode 100644
index 0000000..97500ac
--- /dev/null
+++ b/src/common/library.h
@@ -0,0 +1,109 @@
+#pragma once
+
+#include "fastfetch.h"
+
+#ifndef FF_DISABLE_DLOPEN
+
+    #if defined(_WIN32)
+        #define FF_DLOPEN_FLAGS 0
+FF_A_NODISCARD void* dlopen(const char* path, int mode);
+FF_A_NODISCARD void* dlsym(void* handle, const char* symbol);
+int dlclose(void* handle);
+    #else
+        #include <dlfcn.h>
+    #endif
+
+    #ifdef _WIN32
+        #define FF_LIBRARY_EXTENSION ".dll"
+    #elif defined(__APPLE__)
+        #define FF_LIBRARY_EXTENSION ".dylib"
+    #else
+        #define FF_LIBRARY_EXTENSION ".so"
+    #endif
+
+static inline void ffLibraryUnload(void** handle) {
+    assert(handle);
+    if (*handle) {
+        dlclose(*handle);
+    }
+}
+
+    #if __cplusplus
+        #define __auto_type auto
+    #endif
+
+    #define FF_LIBRARY_SYMBOL(symbolName) \
+        __typeof__(&symbolName) ff##symbolName;
+
+    #define FF_LIBRARY_LOAD(libraryObjectName, returnValue, ...)                                  \
+        void* FF_A_CLEANUP(ffLibraryUnload) libraryObjectName = ffLibraryLoad(__VA_ARGS__, NULL); \
+        if (libraryObjectName == NULL)                                                            \
+            return returnValue;
+
+    #define FF_LIBRARY_LOAD_MESSAGE(libraryObjectName, libraryFileName, maxVersion, ...) \
+        FF_LIBRARY_LOAD(libraryObjectName, "dlopen(" libraryFileName ") failed", libraryFileName, maxVersion, ##__VA_ARGS__)
+
+    #define FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, symbolMapping, symbolName, returnValue) \
+        symbolMapping = (__typeof__(&symbolName)) dlsym(library, #symbolName);              \
+        if (symbolMapping == NULL)                                                          \
+            return returnValue;
+
+    #define FF_LIBRARY_LOAD_SYMBOL(library, symbolName, returnValue) \
+        __auto_type FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, ff##symbolName, symbolName, returnValue);
+
+    #define FF_LIBRARY_LOAD_SYMBOL_LAZY(library, symbolName) \
+        __auto_type ff##symbolName = (__typeof__(&symbolName)) dlsym(library, #symbolName);
+
+    #define FF_LIBRARY_LOAD_SYMBOL_MESSAGE(library, symbolName) \
+        __auto_type FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, ff##symbolName, symbolName, "dlsym " #symbolName " failed");
+
+    #define FF_LIBRARY_LOAD_SYMBOL_VAR(library, varName, symbolName, returnValue) \
+        FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, (varName).ff##symbolName, symbolName, returnValue);
+
+    #define FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(library, varName, symbolName) \
+        FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, (varName).ff##symbolName, symbolName, "dlsym " #symbolName " failed");
+
+    #define FF_LIBRARY_LOAD_SYMBOL_PTR(library, varName, symbolName, returnValue) \
+        FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, (varName)->ff##symbolName, symbolName, returnValue);
+
+void* ffLibraryLoad(const char* path, int maxVersion, ...);
+
+#else
+
+    #define FF_LIBRARY_EXTENSION ""
+
+    #define FF_LIBRARY_SYMBOL(symbolName) \
+        __typeof__(&symbolName) ff##symbolName;
+
+    #define FF_LIBRARY_LOAD(libraryObjectName, returnValue, ...) \
+        FF_A_UNUSED void* libraryObjectName = NULL; // Placeholder
+
+    #define FF_LIBRARY_LOAD_MESSAGE(libraryObjectName, libraryFileName, maxVersion, ...) \
+        FF_LIBRARY_LOAD(libraryObjectName, , libraryFileName, maxVersion, ##__VA_ARGS__)
+
+    #define FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, symbolMapping, symbolName, returnValue) \
+        symbolMapping = (__typeof__(&symbolName)) &symbolName;
+
+    #define FF_LIBRARY_LOAD_SYMBOL(library, symbolName, returnValue) \
+        FF_A_UNUSED __auto_type FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, ff##symbolName, symbolName, returnValue);
+
+    #define FF_LIBRARY_LOAD_SYMBOL_LAZY(library, symbolName) \
+        FF_A_UNUSED __auto_type ff##symbolName = (__typeof__(&symbolName)) &symbolName;
+
+    #define FF_LIBRARY_LOAD_SYMBOL_MESSAGE(library, symbolName) \
+        FF_A_UNUSED __auto_type FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, ff##symbolName, symbolName, "dlsym " #symbolName " failed");
+
+    #define FF_LIBRARY_LOAD_SYMBOL_VAR(library, varName, symbolName, returnValue) \
+        FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, (varName).ff##symbolName, symbolName, returnValue);
+
+    #define FF_LIBRARY_LOAD_SYMBOL_VAR_MESSAGE(library, varName, symbolName) \
+        FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, (varName).ff##symbolName, symbolName, "dlsym " #symbolName " failed");
+
+    #define FF_LIBRARY_LOAD_SYMBOL_PTR(library, varName, symbolName, returnValue) \
+        FF_LIBRARY_LOAD_SYMBOL_ADDRESS(library, (varName)->ff##symbolName, symbolName, returnValue);
+
+#endif
+
+#if _WIN32
+void* ffLibraryGetModule(const wchar_t* libraryFileName);
+#endif