42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
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#include <cstdlib>
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#include <iostream>
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#include <string.h>
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#include <dart_api.h>
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// Forward declaration of ResolveName function.
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Dart_NativeFunction ResolveName(Dart_Handle name, int argc, bool* auto_setup_scope);
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// The name of the initialization function is the extension name followed
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// by _Init.
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DART_EXPORT Dart_Handle angel_wings_Init(Dart_Handle parent_library) {
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if (Dart_IsError(parent_library)) return parent_library;
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Dart_Handle result_code =
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Dart_SetNativeResolver(parent_library, ResolveName, NULL);
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if (Dart_IsError(result_code)) return result_code;
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return Dart_Null();
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}
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Dart_Handle HandleError(Dart_Handle handle) {
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if (Dart_IsError(handle)) Dart_PropagateError(handle);
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return handle;
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}
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// Native functions get their arguments in a Dart_NativeArguments structure
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// and return their results with Dart_SetReturnValue.
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void SayHello(Dart_NativeArguments arguments) {
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std::cout << "Hello, native world!" << std::endl;
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Dart_SetReturnValue(arguments, Dart_Null());
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}
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Dart_NativeFunction ResolveName(Dart_Handle name, int argc, bool* auto_setup_scope) {
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// If we fail, we return NULL, and Dart throws an exception.
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if (!Dart_IsString(name)) return NULL;
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Dart_NativeFunction result = NULL;
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const char* cname;
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HandleError(Dart_StringToCString(name, &cname));
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if (strcmp("SayHello", cname) == 0) result = SayHello;
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return result;
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}
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