1 files changed, 96 insertions, 0 deletions
diff --git a/lib/3rdparty/cdl.c b/lib/3rdparty/cdl.c
new file mode 100644
index 0000000..d7a226a
--- /dev/null
+++ b/lib/3rdparty/cdl.c
@@ -0,0 +1,96 @@
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#ifndef size_t
+#  include <stddef.h>
+#endif
+
+#if defined(_WIN32) || defined(_WIN64)
+#  include <windows.h>
+#elif defined(__posix__) || defined(__unix__) || defined(__linux__) || defined(__APPLE__)
+#  include <dlfcn.h>
+#else
+#  warning "cdl: unsupported os"
+#endif
+
+void* chckDlLoad(const char *file, const char **outError)
+{
+   assert(file);
+   void *handle = NULL;
+   const char *error = NULL;
+
+#if defined(_WIN32) || defined(_WIN64)
+#if defined(__WINRT__)
+   /**
+    * WinRT only publically supports LoadPackagedLibrary() for loading .dll
+    * files. LoadLibrary() is a private API, and not available for apps
+    * (that can be published to MS' Windows Store.)
+    */
+   handle = (void*)LoadPackagedLibrary(file, 0);
+#else
+   handle = (void*)LoadLibrary(file);
+#endif
+
+   if (!handle)
+      error = "Failed to load dll file.";
+#elif defined(__posix__) || defined(__unix__) || defined(__linux__) || defined(__APPLE__)
+   if (!(handle = dlopen(file, RTLD_NOW | RTLD_LOCAL)))
+      error = dlerror();
+#else
+   error = "cdl: unsupported os";
+#endif
+
+   if (outError)
+      *outError = error;
+
+   return handle;
+}
+
+void* chckDlLoadSymbol(void *handle, const char *name, const char **outError)
+{
+   assert(handle);
+   void *symbol = NULL;
+   const char *error = NULL;
+
+#if defined(_WIN32) || defined(_WIN64)
+   if (!(symbol = (void*)GetProcAddress((HMODULE)handle, name)))
+      error = "Failed to load symbol.";
+#elif defined(__posix__) || defined(__unix__) || defined(__linux__) || defined(__APPLE__)
+   if (!(symbol = dlsym(handle, name))) {
+      size_t len = strlen(name) + 1;
+      char *nname = calloc(1, len + 1);
+
+      if (nname) {
+         /* append an underscore for platforms that need that. */
+         nname[0] = '_';
+         memcpy(nname + 1, name, len);
+         symbol = dlsym(handle, nname);
+         free(nname);
+      }
+   }
+
+   if (!symbol)
+      error = dlerror();
+#else
+   error = "cdl: unsupported os";
+#endif
+
+   if (outError)
+      *outError = error;
+
+   return symbol;
+}
+
+void chckDlUnload(void *handle)
+{
+   assert(handle);
+
+#if defined(_WIN32) || defined(_WIN64)
+   FreeLibrary((HMODULE)handle);
+#elif defined(__posix__) || defined(__unix__) || defined(__linux__) || defined(__APPLE__)
+   dlclose(handle);
+#endif
+}
+
+/* vim: set ts=8 sw=3 tw=0 :*/