docs/source/cpp/gandiva/external_func.mmd

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graph TD
    Rust(Rust) --> CFunction(C function)
    Cpp(C++) --> CFunction
    OtherLangs(Other langs) --> CFunction

    C(C) --clang--> LLVMIR(LLVM IR)
    Cpp1(C++) --clang--> LLVMIR
    OtherLangs1(Other langs) --rustc/etc--> LLVMIR

    LLVMIR --LLVM toolchain--> LLVMBitcode(LLVM bitcode)

    CFunction --> Application(application)
    LLVMBitcode --> Application

    Application --Register--> FunctionRegistry
    
    subgraph Gandiva
        BuiltInIRFunctions(built-in IR functions) --> LLVMGenerator(LLVMGenerator)
        BuiltInCFunctions(built-in C functions) --> LLVMGenerator

        FunctionRegistry(FunctionRegistry) --> LLVMGenerator


        LLVMGenerator --> LLVMJITEngine(LLVM JIT engine)

        LLVMJITEngine --codegen--> MachineCode(machine code)
    end

classDef node stroke-width:0px;
class Rust,Cpp,OtherLangs,C,Cpp1,OtherLangs1,LLVMIR,LLVMBitcode,CFunction,Application,BuiltInIRFunctions,BuiltInCFunctions,FunctionRegistry,LLVMGenerator,LLVMJITEngine,MachineCode node;
classDef subGraph fill:#f5f5f5,stroke:#5a5a5a,stroke-width:2px,rx:10,ry:10;
class Gandiva subGraph;