feat: add jextract & FFM API examples

java-panama/src/main/java/com/baeldung/java/panama/core/Greetings.java

@@ -1,14 +1,12 @@
-package com.baeldung.java.panama;
+package com.baeldung.java.panama.core;
 
 import java.lang.foreign.*;
 import java.lang.invoke.MethodHandle;
-import java.util.Objects;
 
-import static java.lang.foreign.ValueLayout.ADDRESS;
-import static java.lang.foreign.ValueLayout.JAVA_INT;
+import static java.lang.foreign.ValueLayout.*;
 
 
-public class HelloWorld {
+public class Greetings {
 
     public static void main(String[] args) throws Throwable {
 
@@ -27,7 +25,9 @@ public class HelloWorld {
                 .orElse(null);
 
 
-        Objects.requireNonNull(methodHandle);
+        if(methodHandle == null){
+            throw new NoSuchMethodError("Method Handle was not found");
+        };
 
         try (MemorySession memorySession = MemorySession.openConfined()) {
             MemorySegment greetingSegment = memorySession.allocateUtf8String(greeting);

java-panama/src/main/java/com/baeldung/java/panama/core/MemoryAllocation.java

@@ -0,0 +1,26 @@
+package com.baeldung.java.panama.core;
+
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.MemorySession;
+import java.lang.foreign.ValueLayout;
+import java.lang.foreign.SegmentAllocator;
+
+
+
+public class MemoryAllocation {
+
+    public static void main(String[] args) throws Throwable {
+
+
+        try (MemorySession session = MemorySession.openConfined()) {
+            String[] greetingStrings = {"hello", "world", "panama", "baeldung"};
+            SegmentAllocator allocator = SegmentAllocator.implicitAllocator();
+            MemorySegment offHeapSegment = allocator.allocateArray(ValueLayout.ADDRESS, greetingStrings.length);
+            for (int i = 0; i < greetingStrings.length; i++) {
+                // Allocate a string off-heap, then store a pointer to it
+                MemorySegment cString = allocator.allocateUtf8String(greetingStrings[i]);
+                offHeapSegment.setAtIndex(ValueLayout.ADDRESS, i, cString);
+            }
+        }
+    }
+}

java-panama/src/main/java/com/baeldung/java/panama/core/MemoryLayout.java

@@ -0,0 +1,56 @@
+package com.baeldung.java.panama.core;
+
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.MemorySession;
+import java.lang.foreign.SequenceLayout;
+import java.lang.invoke.VarHandle;
+
+import static java.lang.foreign.MemoryLayout.sequenceLayout;
+import static java.lang.foreign.MemoryLayout.structLayout;
+import static java.lang.foreign.ValueLayout.*;
+
+
+public class MemoryLayout {
+
+    public static void main(String[] args) {
+
+        GroupLayout pointLayout = structLayout(
+                JAVA_DOUBLE.withName("x"),
+                JAVA_DOUBLE.withName("y")
+        );
+
+        SequenceLayout ptsLayout = sequenceLayout(10,
+                pointLayout);
+
+        VarHandle xvarHandle = pointLayout.varHandle(PathElement.groupElement("x"));
+        VarHandle yvarHandle = pointLayout.varHandle(PathElement.groupElement("y"));
+
+        try (MemorySession memorySession = MemorySession.openConfined()) {
+
+            MemorySegment pointSegment = memorySession.allocate(pointLayout);
+            xvarHandle.set(pointSegment, 3d);
+            yvarHandle.set(pointSegment, 4d);
+
+            System.out.println(pointSegment.toString());
+
+        }
+
+    }
+
+    static class ValueLayout {
+
+        public static void main(String[] args) {
+
+            try (MemorySession memorySession = MemorySession.openConfined()) {
+                int byteSize = 5;
+                int index = 3;
+                float value = 6;
+                MemorySegment segment = MemorySegment.allocateNative(byteSize, memorySession);
+                segment.setAtIndex(JAVA_FLOAT, index, value);
+                float result = segment.getAtIndex(JAVA_FLOAT, index);
+                System.out.println("Float value is:" + result);
+            }
+        }
+    }
+}

java-panama/src/main/java/com/baeldung/java/panama/jextract/Greetings.java

@@ -0,0 +1,17 @@
+package com.baeldung.java.panama.jextract;
+
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.MemorySession;
+import static foreign.c.stdio_h.printf;
+
+public class Greetings {
+
+    public static void main(String[] args) {
+        String greeting = "Hello World from Project Panama Baeldung Article, using JExtract!";
+
+        try (MemorySession memorySession = MemorySession.openConfined()) {
+            MemorySegment greetingSegment = memorySession.allocateUtf8String(greeting);
+            printf(greetingSegment);
+        }
+    }
+}

java-panama/src/main/java/foreign/c/Constants$root.java

@@ -0,0 +1,23 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+public class Constants$root {
+
+    static final  OfBoolean C_BOOL$LAYOUT = JAVA_BOOLEAN;
+    static final  OfByte C_CHAR$LAYOUT = JAVA_BYTE;
+    static final  OfShort C_SHORT$LAYOUT = JAVA_SHORT.withBitAlignment(16);
+    static final  OfInt C_INT$LAYOUT = JAVA_INT.withBitAlignment(32);
+    static final  OfInt C_LONG$LAYOUT = JAVA_INT.withBitAlignment(32);
+    static final  OfLong C_LONG_LONG$LAYOUT = JAVA_LONG.withBitAlignment(64);
+    static final  OfFloat C_FLOAT$LAYOUT = JAVA_FLOAT.withBitAlignment(32);
+    static final  OfDouble C_DOUBLE$LAYOUT = JAVA_DOUBLE.withBitAlignment(64);
+    static final  OfAddress C_POINTER$LAYOUT = ADDRESS.withBitAlignment(64);
+}
+
+

java-panama/src/main/java/foreign/c/FILE.java

@@ -0,0 +1,14 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+public class FILE extends _iobuf {
+
+}
+
+

java-panama/src/main/java/foreign/c/RuntimeHelper.java

@@ -0,0 +1,233 @@
+package foreign.c;
+// Generated by jextract
+
+import java.lang.foreign.Addressable;
+import java.lang.foreign.Linker;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.GroupLayout;
+import java.lang.foreign.SymbolLookup;
+import java.lang.foreign.MemoryAddress;
+import java.lang.foreign.MemoryLayout;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.MemorySession;
+import java.lang.foreign.SegmentAllocator;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.io.File;
+import java.nio.file.Path;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+import static java.lang.foreign.Linker.*;
+import static java.lang.foreign.ValueLayout.*;
+
+final class RuntimeHelper {
+
+    private RuntimeHelper() {}
+    private final static Linker LINKER = Linker.nativeLinker();
+    private final static ClassLoader LOADER = RuntimeHelper.class.getClassLoader();
+    private final static MethodHandles.Lookup MH_LOOKUP = MethodHandles.lookup();
+    private final static SymbolLookup SYMBOL_LOOKUP;
+
+    final static SegmentAllocator CONSTANT_ALLOCATOR =
+            (size, align) -> MemorySegment.allocateNative(size, align, MemorySession.openImplicit());
+
+    static {
+        
+        SymbolLookup loaderLookup = SymbolLookup.loaderLookup();
+        SYMBOL_LOOKUP = name -> loaderLookup.lookup(name).or(() -> LINKER.defaultLookup().lookup(name));
+    }
+
+    static <T> T requireNonNull(T obj, String symbolName) {
+        if (obj == null) {
+            throw new UnsatisfiedLinkError("unresolved symbol: " + symbolName);
+        }
+        return obj;
+    }
+
+    private final static SegmentAllocator THROWING_ALLOCATOR = (x, y) -> { throw new AssertionError("should not reach here"); };
+
+    static final MemorySegment lookupGlobalVariable(String name, MemoryLayout layout) {
+        return SYMBOL_LOOKUP.lookup(name).map(symbol -> MemorySegment.ofAddress(symbol.address(), layout.byteSize(), MemorySession.openShared())).orElse(null);
+    }
+
+    static final MethodHandle downcallHandle(String name, FunctionDescriptor fdesc) {
+        return SYMBOL_LOOKUP.lookup(name).
+                map(addr -> LINKER.downcallHandle(addr, fdesc)).
+                orElse(null);
+    }
+
+    static final MethodHandle downcallHandle(FunctionDescriptor fdesc) {
+        return LINKER.downcallHandle(fdesc);
+    }
+
+    static final MethodHandle downcallHandleVariadic(String name, FunctionDescriptor fdesc) {
+        return SYMBOL_LOOKUP.lookup(name).
+                map(addr -> VarargsInvoker.make(addr, fdesc)).
+                orElse(null);
+    }
+
+    static final <Z> MemorySegment upcallStub(Class<Z> fi, Z z, FunctionDescriptor fdesc, MemorySession session) {
+        try {
+            MethodHandle handle = MH_LOOKUP.findVirtual(fi, "apply", Linker.upcallType(fdesc));
+            handle = handle.bindTo(z);
+            return LINKER.upcallStub(handle, fdesc, session);
+        } catch (Throwable ex) {
+            throw new AssertionError(ex);
+        }
+    }
+
+    static MemorySegment asArray(MemoryAddress addr, MemoryLayout layout, int numElements, MemorySession session) {
+         return MemorySegment.ofAddress(addr, numElements * layout.byteSize(), session);
+    }
+
+    // Internals only below this point
+
+    private static class VarargsInvoker {
+        private static final MethodHandle INVOKE_MH;
+        private final MemorySegment symbol;
+        private final FunctionDescriptor function;
+
+        private VarargsInvoker(MemorySegment symbol, FunctionDescriptor function) {
+            this.symbol = symbol;
+            this.function = function;
+        }
+
+        static {
+            try {
+                INVOKE_MH = MethodHandles.lookup().findVirtual(VarargsInvoker.class, "invoke", MethodType.methodType(Object.class, SegmentAllocator.class, Object[].class));
+            } catch (ReflectiveOperationException e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        static MethodHandle make(MemorySegment symbol, FunctionDescriptor function) {
+            VarargsInvoker invoker = new VarargsInvoker(symbol, function);
+            MethodHandle handle = INVOKE_MH.bindTo(invoker).asCollector(Object[].class, function.argumentLayouts().size() + 1);
+            MethodType mtype = MethodType.methodType(function.returnLayout().isPresent() ? carrier(function.returnLayout().get(), true) : void.class);
+            for (MemoryLayout layout : function.argumentLayouts()) {
+                mtype = mtype.appendParameterTypes(carrier(layout, false));
+            }
+            mtype = mtype.appendParameterTypes(Object[].class);
+            if (mtype.returnType().equals(MemorySegment.class)) {
+                mtype = mtype.insertParameterTypes(0, SegmentAllocator.class);
+            } else {
+                handle = MethodHandles.insertArguments(handle, 0, THROWING_ALLOCATOR);
+            }
+            return handle.asType(mtype);
+        }
+
+        static Class<?> carrier(MemoryLayout layout, boolean ret) {
+            if (layout instanceof ValueLayout valueLayout) {
+                return (ret || valueLayout.carrier() != MemoryAddress.class) ?
+                        valueLayout.carrier() : Addressable.class;
+            } else if (layout instanceof GroupLayout) {
+                return MemorySegment.class;
+            } else {
+                throw new AssertionError("Cannot get here!");
+            }
+        }
+
+        private Object invoke(SegmentAllocator allocator, Object[] args) throws Throwable {
+            // one trailing Object[]
+            int nNamedArgs = function.argumentLayouts().size();
+            assert(args.length == nNamedArgs + 1);
+            // The last argument is the array of vararg collector
+            Object[] unnamedArgs = (Object[]) args[args.length - 1];
+
+            int argsCount = nNamedArgs + unnamedArgs.length;
+            Class<?>[] argTypes = new Class<?>[argsCount];
+            MemoryLayout[] argLayouts = new MemoryLayout[nNamedArgs + unnamedArgs.length];
+
+            int pos = 0;
+            for (pos = 0; pos < nNamedArgs; pos++) {
+                argLayouts[pos] = function.argumentLayouts().get(pos);
+            }
+
+            assert pos == nNamedArgs;
+            for (Object o: unnamedArgs) {
+                argLayouts[pos] = variadicLayout(normalize(o.getClass()));
+                pos++;
+            }
+            assert pos == argsCount;
+
+            FunctionDescriptor f = (function.returnLayout().isEmpty()) ?
+                    FunctionDescriptor.ofVoid(argLayouts) :
+                    FunctionDescriptor.of(function.returnLayout().get(), argLayouts);
+            MethodHandle mh = LINKER.downcallHandle(symbol, f);
+            if (mh.type().returnType() == MemorySegment.class) {
+                mh = mh.bindTo(allocator);
+            }
+            // flatten argument list so that it can be passed to an asSpreader MH
+            Object[] allArgs = new Object[nNamedArgs + unnamedArgs.length];
+            System.arraycopy(args, 0, allArgs, 0, nNamedArgs);
+            System.arraycopy(unnamedArgs, 0, allArgs, nNamedArgs, unnamedArgs.length);
+
+            return mh.asSpreader(Object[].class, argsCount).invoke(allArgs);
+        }
+
+        private static Class<?> unboxIfNeeded(Class<?> clazz) {
+            if (clazz == Boolean.class) {
+                return boolean.class;
+            } else if (clazz == Void.class) {
+                return void.class;
+            } else if (clazz == Byte.class) {
+                return byte.class;
+            } else if (clazz == Character.class) {
+                return char.class;
+            } else if (clazz == Short.class) {
+                return short.class;
+            } else if (clazz == Integer.class) {
+                return int.class;
+            } else if (clazz == Long.class) {
+                return long.class;
+            } else if (clazz == Float.class) {
+                return float.class;
+            } else if (clazz == Double.class) {
+                return double.class;
+            } else {
+                return clazz;
+            }
+        }
+
+        private Class<?> promote(Class<?> c) {
+            if (c == byte.class || c == char.class || c == short.class || c == int.class) {
+                return long.class;
+            } else if (c == float.class) {
+                return double.class;
+            } else {
+                return c;
+            }
+        }
+
+        private Class<?> normalize(Class<?> c) {
+            c = unboxIfNeeded(c);
+            if (c.isPrimitive()) {
+                return promote(c);
+            }
+            if (MemoryAddress.class.isAssignableFrom(c)) {
+                return MemoryAddress.class;
+            }
+            if (MemorySegment.class.isAssignableFrom(c)) {
+                return MemorySegment.class;
+            }
+            throw new IllegalArgumentException("Invalid type for ABI: " + c.getTypeName());
+        }
+
+        private MemoryLayout variadicLayout(Class<?> c) {
+            if (c == long.class) {
+                return JAVA_LONG;
+            } else if (c == double.class) {
+                return JAVA_DOUBLE;
+            } else if (MemoryAddress.class.isAssignableFrom(c)) {
+                return ADDRESS;
+            } else {
+                throw new IllegalArgumentException("Unhandled variadic argument class: " + c);
+            }
+        }
+    }
+}

java-panama/src/main/java/foreign/c/_iobuf.java

@@ -0,0 +1,162 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+public class _iobuf {
+
+    static final  GroupLayout $struct$LAYOUT = MemoryLayout.structLayout(
+        Constants$root.C_POINTER$LAYOUT.withName("_ptr"),
+        Constants$root.C_LONG$LAYOUT.withName("_cnt"),
+        MemoryLayout.paddingLayout(32),
+        Constants$root.C_POINTER$LAYOUT.withName("_base"),
+        Constants$root.C_LONG$LAYOUT.withName("_flag"),
+        Constants$root.C_LONG$LAYOUT.withName("_file"),
+        Constants$root.C_LONG$LAYOUT.withName("_charbuf"),
+        Constants$root.C_LONG$LAYOUT.withName("_bufsiz"),
+        Constants$root.C_POINTER$LAYOUT.withName("_tmpfname")
+    ).withName("_iobuf");
+    public static MemoryLayout $LAYOUT() {
+        return _iobuf.$struct$LAYOUT;
+    }
+    static final VarHandle _ptr$VH = $struct$LAYOUT.varHandle(MemoryLayout.PathElement.groupElement("_ptr"));
+    public static VarHandle _ptr$VH() {
+        return _iobuf._ptr$VH;
+    }
+    public static MemoryAddress _ptr$get(MemorySegment seg) {
+        return (java.lang.foreign.MemoryAddress)_iobuf._ptr$VH.get(seg);
+    }
+    public static void _ptr$set( MemorySegment seg, MemoryAddress x) {
+        _iobuf._ptr$VH.set(seg, x);
+    }
+    public static MemoryAddress _ptr$get(MemorySegment seg, long index) {
+        return (java.lang.foreign.MemoryAddress)_iobuf._ptr$VH.get(seg.asSlice(index*sizeof()));
+    }
+    public static void _ptr$set(MemorySegment seg, long index, MemoryAddress x) {
+        _iobuf._ptr$VH.set(seg.asSlice(index*sizeof()), x);
+    }
+    static final VarHandle _cnt$VH = $struct$LAYOUT.varHandle(MemoryLayout.PathElement.groupElement("_cnt"));
+    public static VarHandle _cnt$VH() {
+        return _iobuf._cnt$VH;
+    }
+    public static int _cnt$get(MemorySegment seg) {
+        return (int)_iobuf._cnt$VH.get(seg);
+    }
+    public static void _cnt$set( MemorySegment seg, int x) {
+        _iobuf._cnt$VH.set(seg, x);
+    }
+    public static int _cnt$get(MemorySegment seg, long index) {
+        return (int)_iobuf._cnt$VH.get(seg.asSlice(index*sizeof()));
+    }
+    public static void _cnt$set(MemorySegment seg, long index, int x) {
+        _iobuf._cnt$VH.set(seg.asSlice(index*sizeof()), x);
+    }
+    static final VarHandle _base$VH = $struct$LAYOUT.varHandle(MemoryLayout.PathElement.groupElement("_base"));
+    public static VarHandle _base$VH() {
+        return _iobuf._base$VH;
+    }
+    public static MemoryAddress _base$get(MemorySegment seg) {
+        return (java.lang.foreign.MemoryAddress)_iobuf._base$VH.get(seg);
+    }
+    public static void _base$set( MemorySegment seg, MemoryAddress x) {
+        _iobuf._base$VH.set(seg, x);
+    }
+    public static MemoryAddress _base$get(MemorySegment seg, long index) {
+        return (java.lang.foreign.MemoryAddress)_iobuf._base$VH.get(seg.asSlice(index*sizeof()));
+    }
+    public static void _base$set(MemorySegment seg, long index, MemoryAddress x) {
+        _iobuf._base$VH.set(seg.asSlice(index*sizeof()), x);
+    }
+    static final VarHandle _flag$VH = $struct$LAYOUT.varHandle(MemoryLayout.PathElement.groupElement("_flag"));
+    public static VarHandle _flag$VH() {
+        return _iobuf._flag$VH;
+    }
+    public static int _flag$get(MemorySegment seg) {
+        return (int)_iobuf._flag$VH.get(seg);
+    }
+    public static void _flag$set( MemorySegment seg, int x) {
+        _iobuf._flag$VH.set(seg, x);
+    }
+    public static int _flag$get(MemorySegment seg, long index) {
+        return (int)_iobuf._flag$VH.get(seg.asSlice(index*sizeof()));
+    }
+    public static void _flag$set(MemorySegment seg, long index, int x) {
+        _iobuf._flag$VH.set(seg.asSlice(index*sizeof()), x);
+    }
+    static final VarHandle _file$VH = $struct$LAYOUT.varHandle(MemoryLayout.PathElement.groupElement("_file"));
+    public static VarHandle _file$VH() {
+        return _iobuf._file$VH;
+    }
+    public static int _file$get(MemorySegment seg) {
+        return (int)_iobuf._file$VH.get(seg);
+    }
+    public static void _file$set( MemorySegment seg, int x) {
+        _iobuf._file$VH.set(seg, x);
+    }
+    public static int _file$get(MemorySegment seg, long index) {
+        return (int)_iobuf._file$VH.get(seg.asSlice(index*sizeof()));
+    }
+    public static void _file$set(MemorySegment seg, long index, int x) {
+        _iobuf._file$VH.set(seg.asSlice(index*sizeof()), x);
+    }
+    static final VarHandle _charbuf$VH = $struct$LAYOUT.varHandle(MemoryLayout.PathElement.groupElement("_charbuf"));
+    public static VarHandle _charbuf$VH() {
+        return _iobuf._charbuf$VH;
+    }
+    public static int _charbuf$get(MemorySegment seg) {
+        return (int)_iobuf._charbuf$VH.get(seg);
+    }
+    public static void _charbuf$set( MemorySegment seg, int x) {
+        _iobuf._charbuf$VH.set(seg, x);
+    }
+    public static int _charbuf$get(MemorySegment seg, long index) {
+        return (int)_iobuf._charbuf$VH.get(seg.asSlice(index*sizeof()));
+    }
+    public static void _charbuf$set(MemorySegment seg, long index, int x) {
+        _iobuf._charbuf$VH.set(seg.asSlice(index*sizeof()), x);
+    }
+    static final VarHandle _bufsiz$VH = $struct$LAYOUT.varHandle(MemoryLayout.PathElement.groupElement("_bufsiz"));
+    public static VarHandle _bufsiz$VH() {
+        return _iobuf._bufsiz$VH;
+    }
+    public static int _bufsiz$get(MemorySegment seg) {
+        return (int)_iobuf._bufsiz$VH.get(seg);
+    }
+    public static void _bufsiz$set( MemorySegment seg, int x) {
+        _iobuf._bufsiz$VH.set(seg, x);
+    }
+    public static int _bufsiz$get(MemorySegment seg, long index) {
+        return (int)_iobuf._bufsiz$VH.get(seg.asSlice(index*sizeof()));
+    }
+    public static void _bufsiz$set(MemorySegment seg, long index, int x) {
+        _iobuf._bufsiz$VH.set(seg.asSlice(index*sizeof()), x);
+    }
+    static final VarHandle _tmpfname$VH = $struct$LAYOUT.varHandle(MemoryLayout.PathElement.groupElement("_tmpfname"));
+    public static VarHandle _tmpfname$VH() {
+        return _iobuf._tmpfname$VH;
+    }
+    public static MemoryAddress _tmpfname$get(MemorySegment seg) {
+        return (java.lang.foreign.MemoryAddress)_iobuf._tmpfname$VH.get(seg);
+    }
+    public static void _tmpfname$set( MemorySegment seg, MemoryAddress x) {
+        _iobuf._tmpfname$VH.set(seg, x);
+    }
+    public static MemoryAddress _tmpfname$get(MemorySegment seg, long index) {
+        return (java.lang.foreign.MemoryAddress)_iobuf._tmpfname$VH.get(seg.asSlice(index*sizeof()));
+    }
+    public static void _tmpfname$set(MemorySegment seg, long index, MemoryAddress x) {
+        _iobuf._tmpfname$VH.set(seg.asSlice(index*sizeof()), x);
+    }
+    public static long sizeof() { return $LAYOUT().byteSize(); }
+    public static MemorySegment allocate(SegmentAllocator allocator) { return allocator.allocate($LAYOUT()); }
+    public static MemorySegment allocateArray(int len, SegmentAllocator allocator) {
+        return allocator.allocate(MemoryLayout.sequenceLayout(len, $LAYOUT()));
+    }
+    public static MemorySegment ofAddress(MemoryAddress addr, MemorySession session) { return RuntimeHelper.asArray(addr, $LAYOUT(), 1, session); }
+}
+
+

java-panama/src/main/java/foreign/c/constants$0.java

@@ -0,0 +1,52 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$0 {
+
+    static final FunctionDescriptor fopen$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fopen$MH = RuntimeHelper.downcallHandle(
+        "fopen",
+        constants$0.fopen$FUNC
+    );
+    static final FunctionDescriptor freopen$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle freopen$MH = RuntimeHelper.downcallHandle(
+        "freopen",
+        constants$0.freopen$FUNC
+    );
+    static final FunctionDescriptor fflush$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fflush$MH = RuntimeHelper.downcallHandle(
+        "fflush",
+        constants$0.fflush$FUNC
+    );
+    static final FunctionDescriptor fclose$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fclose$MH = RuntimeHelper.downcallHandle(
+        "fclose",
+        constants$0.fclose$FUNC
+    );
+    static final FunctionDescriptor remove$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle remove$MH = RuntimeHelper.downcallHandle(
+        "remove",
+        constants$0.remove$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$1.java

@@ -0,0 +1,54 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$1 {
+
+    static final FunctionDescriptor rename$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle rename$MH = RuntimeHelper.downcallHandle(
+        "rename",
+        constants$1.rename$FUNC
+    );
+    static final FunctionDescriptor tmpfile$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT);
+    static final MethodHandle tmpfile$MH = RuntimeHelper.downcallHandle(
+        "tmpfile",
+        constants$1.tmpfile$FUNC
+    );
+    static final FunctionDescriptor tmpnam$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle tmpnam$MH = RuntimeHelper.downcallHandle(
+        "tmpnam",
+        constants$1.tmpnam$FUNC
+    );
+    static final FunctionDescriptor _tempnam$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _tempnam$MH = RuntimeHelper.downcallHandle(
+        "_tempnam",
+        constants$1._tempnam$FUNC
+    );
+    static final FunctionDescriptor _rmtmp$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle _rmtmp$MH = RuntimeHelper.downcallHandle(
+        "_rmtmp",
+        constants$1._rmtmp$FUNC
+    );
+    static final FunctionDescriptor _unlink$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _unlink$MH = RuntimeHelper.downcallHandle(
+        "_unlink",
+        constants$1._unlink$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$10.java

@@ -0,0 +1,61 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$10 {
+
+    static final FunctionDescriptor getc$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle getc$MH = RuntimeHelper.downcallHandle(
+        "getc",
+        constants$10.getc$FUNC
+    );
+    static final FunctionDescriptor putc$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle putc$MH = RuntimeHelper.downcallHandle(
+        "putc",
+        constants$10.putc$FUNC
+    );
+    static final FunctionDescriptor getchar$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle getchar$MH = RuntimeHelper.downcallHandle(
+        "getchar",
+        constants$10.getchar$FUNC
+    );
+    static final FunctionDescriptor putchar$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT
+    );
+    static final MethodHandle putchar$MH = RuntimeHelper.downcallHandle(
+        "putchar",
+        constants$10.putchar$FUNC
+    );
+    static final FunctionDescriptor fread$FUNC = FunctionDescriptor.of(Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fread$MH = RuntimeHelper.downcallHandle(
+        "fread",
+        constants$10.fread$FUNC
+    );
+    static final FunctionDescriptor fwrite$FUNC = FunctionDescriptor.of(Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fwrite$MH = RuntimeHelper.downcallHandle(
+        "fwrite",
+        constants$10.fwrite$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$11.java

@@ -0,0 +1,60 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$11 {
+
+    static final FunctionDescriptor fseek$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT
+    );
+    static final MethodHandle fseek$MH = RuntimeHelper.downcallHandle(
+        "fseek",
+        constants$11.fseek$FUNC
+    );
+    static final FunctionDescriptor ftell$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle ftell$MH = RuntimeHelper.downcallHandle(
+        "ftell",
+        constants$11.ftell$FUNC
+    );
+    static final FunctionDescriptor rewind$FUNC = FunctionDescriptor.ofVoid(
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle rewind$MH = RuntimeHelper.downcallHandle(
+        "rewind",
+        constants$11.rewind$FUNC
+    );
+    static final FunctionDescriptor fgetpos$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fgetpos$MH = RuntimeHelper.downcallHandle(
+        "fgetpos",
+        constants$11.fgetpos$FUNC
+    );
+    static final FunctionDescriptor fsetpos$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fsetpos$MH = RuntimeHelper.downcallHandle(
+        "fsetpos",
+        constants$11.fsetpos$FUNC
+    );
+    static final FunctionDescriptor feof$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle feof$MH = RuntimeHelper.downcallHandle(
+        "feof",
+        constants$11.feof$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$12.java

@@ -0,0 +1,58 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$12 {
+
+    static final FunctionDescriptor ferror$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle ferror$MH = RuntimeHelper.downcallHandle(
+        "ferror",
+        constants$12.ferror$FUNC
+    );
+    static final FunctionDescriptor clearerr$FUNC = FunctionDescriptor.ofVoid(
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle clearerr$MH = RuntimeHelper.downcallHandle(
+        "clearerr",
+        constants$12.clearerr$FUNC
+    );
+    static final FunctionDescriptor perror$FUNC = FunctionDescriptor.ofVoid(
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle perror$MH = RuntimeHelper.downcallHandle(
+        "perror",
+        constants$12.perror$FUNC
+    );
+    static final FunctionDescriptor _popen$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _popen$MH = RuntimeHelper.downcallHandle(
+        "_popen",
+        constants$12._popen$FUNC
+    );
+    static final FunctionDescriptor _pclose$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _pclose$MH = RuntimeHelper.downcallHandle(
+        "_pclose",
+        constants$12._pclose$FUNC
+    );
+    static final FunctionDescriptor popen$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle popen$MH = RuntimeHelper.downcallHandle(
+        "popen",
+        constants$12.popen$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$13.java

@@ -0,0 +1,53 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$13 {
+
+    static final FunctionDescriptor pclose$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle pclose$MH = RuntimeHelper.downcallHandle(
+        "pclose",
+        constants$13.pclose$FUNC
+    );
+    static final FunctionDescriptor _flushall$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle _flushall$MH = RuntimeHelper.downcallHandle(
+        "_flushall",
+        constants$13._flushall$FUNC
+    );
+    static final FunctionDescriptor _fgetchar$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle _fgetchar$MH = RuntimeHelper.downcallHandle(
+        "_fgetchar",
+        constants$13._fgetchar$FUNC
+    );
+    static final FunctionDescriptor _fputchar$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT
+    );
+    static final MethodHandle _fputchar$MH = RuntimeHelper.downcallHandle(
+        "_fputchar",
+        constants$13._fputchar$FUNC
+    );
+    static final FunctionDescriptor _fdopen$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _fdopen$MH = RuntimeHelper.downcallHandle(
+        "_fdopen",
+        constants$13._fdopen$FUNC
+    );
+    static final FunctionDescriptor _fileno$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _fileno$MH = RuntimeHelper.downcallHandle(
+        "_fileno",
+        constants$13._fileno$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$14.java

@@ -0,0 +1,52 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$14 {
+
+    static final FunctionDescriptor _fcloseall$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle _fcloseall$MH = RuntimeHelper.downcallHandle(
+        "_fcloseall",
+        constants$14._fcloseall$FUNC
+    );
+    static final FunctionDescriptor _fsopen$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG$LAYOUT
+    );
+    static final MethodHandle _fsopen$MH = RuntimeHelper.downcallHandle(
+        "_fsopen",
+        constants$14._fsopen$FUNC
+    );
+    static final FunctionDescriptor __mingw_get_output_format$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle __mingw_get_output_format$MH = RuntimeHelper.downcallHandle(
+        "__mingw_get_output_format",
+        constants$14.__mingw_get_output_format$FUNC
+    );
+    static final FunctionDescriptor __mingw_set_output_format$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT
+    );
+    static final MethodHandle __mingw_set_output_format$MH = RuntimeHelper.downcallHandle(
+        "__mingw_set_output_format",
+        constants$14.__mingw_set_output_format$FUNC
+    );
+    static final FunctionDescriptor __mingw_get_printf_count_output$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle __mingw_get_printf_count_output$MH = RuntimeHelper.downcallHandle(
+        "__mingw_get_printf_count_output",
+        constants$14.__mingw_get_printf_count_output$FUNC
+    );
+    static final FunctionDescriptor __mingw_set_printf_count_output$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT
+    );
+    static final MethodHandle __mingw_set_printf_count_output$MH = RuntimeHelper.downcallHandle(
+        "__mingw_set_printf_count_output",
+        constants$14.__mingw_set_printf_count_output$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$15.java

@@ -0,0 +1,50 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$15 {
+
+    static final FunctionDescriptor _get_output_format$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle _get_output_format$MH = RuntimeHelper.downcallHandle(
+        "_get_output_format",
+        constants$15._get_output_format$FUNC
+    );
+    static final FunctionDescriptor _set_output_format$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT
+    );
+    static final MethodHandle _set_output_format$MH = RuntimeHelper.downcallHandle(
+        "_set_output_format",
+        constants$15._set_output_format$FUNC
+    );
+    static final FunctionDescriptor _get_printf_count_output$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle _get_printf_count_output$MH = RuntimeHelper.downcallHandle(
+        "_get_printf_count_output",
+        constants$15._get_printf_count_output$FUNC
+    );
+    static final FunctionDescriptor _set_printf_count_output$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT
+    );
+    static final MethodHandle _set_printf_count_output$MH = RuntimeHelper.downcallHandle(
+        "_set_printf_count_output",
+        constants$15._set_printf_count_output$FUNC
+    );
+    static final FunctionDescriptor fgetchar$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle fgetchar$MH = RuntimeHelper.downcallHandle(
+        "fgetchar",
+        constants$15.fgetchar$FUNC
+    );
+    static final FunctionDescriptor fputchar$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT
+    );
+    static final MethodHandle fputchar$MH = RuntimeHelper.downcallHandle(
+        "fputchar",
+        constants$15.fputchar$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$16.java

@@ -0,0 +1,61 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$16 {
+
+    static final FunctionDescriptor fdopen$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fdopen$MH = RuntimeHelper.downcallHandle(
+        "fdopen",
+        constants$16.fdopen$FUNC
+    );
+    static final FunctionDescriptor fileno$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fileno$MH = RuntimeHelper.downcallHandle(
+        "fileno",
+        constants$16.fileno$FUNC
+    );
+    static final FunctionDescriptor fwprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fwprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "fwprintf",
+        constants$16.fwprintf$FUNC
+    );
+    static final FunctionDescriptor wprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle wprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "wprintf",
+        constants$16.wprintf$FUNC
+    );
+    static final FunctionDescriptor vfwprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vfwprintf$MH = RuntimeHelper.downcallHandle(
+        "vfwprintf",
+        constants$16.vfwprintf$FUNC
+    );
+    static final FunctionDescriptor vwprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vwprintf$MH = RuntimeHelper.downcallHandle(
+        "vwprintf",
+        constants$16.vwprintf$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$17.java

@@ -0,0 +1,64 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$17 {
+
+    static final FunctionDescriptor _snwprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _snwprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "_snwprintf",
+        constants$17._snwprintf$FUNC
+    );
+    static final FunctionDescriptor _vscwprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _vscwprintf$MH = RuntimeHelper.downcallHandle(
+        "_vscwprintf",
+        constants$17._vscwprintf$FUNC
+    );
+    static final FunctionDescriptor _vsnwprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _vsnwprintf$MH = RuntimeHelper.downcallHandle(
+        "_vsnwprintf",
+        constants$17._vsnwprintf$FUNC
+    );
+    static final FunctionDescriptor fwscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fwscanf$MH = RuntimeHelper.downcallHandleVariadic(
+        "fwscanf",
+        constants$17.fwscanf$FUNC
+    );
+    static final FunctionDescriptor wscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle wscanf$MH = RuntimeHelper.downcallHandleVariadic(
+        "wscanf",
+        constants$17.wscanf$FUNC
+    );
+    static final FunctionDescriptor swscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle swscanf$MH = RuntimeHelper.downcallHandleVariadic(
+        "swscanf",
+        constants$17.swscanf$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$18.java

@@ -0,0 +1,63 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$18 {
+
+    static final FunctionDescriptor fgetwc$FUNC = FunctionDescriptor.of(Constants$root.C_SHORT$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fgetwc$MH = RuntimeHelper.downcallHandle(
+        "fgetwc",
+        constants$18.fgetwc$FUNC
+    );
+    static final FunctionDescriptor fputwc$FUNC = FunctionDescriptor.of(Constants$root.C_SHORT$LAYOUT,
+        Constants$root.C_SHORT$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fputwc$MH = RuntimeHelper.downcallHandle(
+        "fputwc",
+        constants$18.fputwc$FUNC
+    );
+    static final FunctionDescriptor ungetwc$FUNC = FunctionDescriptor.of(Constants$root.C_SHORT$LAYOUT,
+        Constants$root.C_SHORT$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle ungetwc$MH = RuntimeHelper.downcallHandle(
+        "ungetwc",
+        constants$18.ungetwc$FUNC
+    );
+    static final FunctionDescriptor swprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle swprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "swprintf",
+        constants$18.swprintf$FUNC
+    );
+    static final FunctionDescriptor vswprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vswprintf$MH = RuntimeHelper.downcallHandle(
+        "vswprintf",
+        constants$18.vswprintf$FUNC
+    );
+    static final FunctionDescriptor snwprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle snwprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "snwprintf",
+        constants$18.snwprintf$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$19.java

@@ -0,0 +1,62 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$19 {
+
+    static final FunctionDescriptor vsnwprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vsnwprintf$MH = RuntimeHelper.downcallHandle(
+        "vsnwprintf",
+        constants$19.vsnwprintf$FUNC
+    );
+    static final FunctionDescriptor vwscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vwscanf$MH = RuntimeHelper.downcallHandle(
+        "vwscanf",
+        constants$19.vwscanf$FUNC
+    );
+    static final FunctionDescriptor vfwscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vfwscanf$MH = RuntimeHelper.downcallHandle(
+        "vfwscanf",
+        constants$19.vfwscanf$FUNC
+    );
+    static final FunctionDescriptor vswscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vswscanf$MH = RuntimeHelper.downcallHandle(
+        "vswscanf",
+        constants$19.vswscanf$FUNC
+    );
+    static final FunctionDescriptor _fgetwchar$FUNC = FunctionDescriptor.of(Constants$root.C_SHORT$LAYOUT);
+    static final MethodHandle _fgetwchar$MH = RuntimeHelper.downcallHandle(
+        "_fgetwchar",
+        constants$19._fgetwchar$FUNC
+    );
+    static final FunctionDescriptor _fputwchar$FUNC = FunctionDescriptor.of(Constants$root.C_SHORT$LAYOUT,
+        Constants$root.C_SHORT$LAYOUT
+    );
+    static final MethodHandle _fputwchar$MH = RuntimeHelper.downcallHandle(
+        "_fputwchar",
+        constants$19._fputwchar$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$2.java

@@ -0,0 +1,60 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$2 {
+
+    static final FunctionDescriptor tempnam$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle tempnam$MH = RuntimeHelper.downcallHandle(
+        "tempnam",
+        constants$2.tempnam$FUNC
+    );
+    static final FunctionDescriptor rmtmp$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT);
+    static final MethodHandle rmtmp$MH = RuntimeHelper.downcallHandle(
+        "rmtmp",
+        constants$2.rmtmp$FUNC
+    );
+    static final FunctionDescriptor unlink$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle unlink$MH = RuntimeHelper.downcallHandle(
+        "unlink",
+        constants$2.unlink$FUNC
+    );
+    static final FunctionDescriptor setvbuf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT
+    );
+    static final MethodHandle setvbuf$MH = RuntimeHelper.downcallHandle(
+        "setvbuf",
+        constants$2.setvbuf$FUNC
+    );
+    static final FunctionDescriptor setbuf$FUNC = FunctionDescriptor.ofVoid(
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle setbuf$MH = RuntimeHelper.downcallHandle(
+        "setbuf",
+        constants$2.setbuf$FUNC
+    );
+    static final FunctionDescriptor __mingw_fprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __mingw_fprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "__mingw_fprintf",
+        constants$2.__mingw_fprintf$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$20.java

@@ -0,0 +1,56 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$20 {
+
+    static final FunctionDescriptor _getw$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _getw$MH = RuntimeHelper.downcallHandle(
+        "_getw",
+        constants$20._getw$FUNC
+    );
+    static final FunctionDescriptor _putw$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _putw$MH = RuntimeHelper.downcallHandle(
+        "_putw",
+        constants$20._putw$FUNC
+    );
+    static final FunctionDescriptor fgetwchar$FUNC = FunctionDescriptor.of(Constants$root.C_SHORT$LAYOUT);
+    static final MethodHandle fgetwchar$MH = RuntimeHelper.downcallHandle(
+        "fgetwchar",
+        constants$20.fgetwchar$FUNC
+    );
+    static final FunctionDescriptor fputwchar$FUNC = FunctionDescriptor.of(Constants$root.C_SHORT$LAYOUT,
+        Constants$root.C_SHORT$LAYOUT
+    );
+    static final MethodHandle fputwchar$MH = RuntimeHelper.downcallHandle(
+        "fputwchar",
+        constants$20.fputwchar$FUNC
+    );
+    static final FunctionDescriptor getw$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle getw$MH = RuntimeHelper.downcallHandle(
+        "getw",
+        constants$20.getw$FUNC
+    );
+    static final FunctionDescriptor putw$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle putw$MH = RuntimeHelper.downcallHandle(
+        "putw",
+        constants$20.putw$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$21.java

@@ -0,0 +1,18 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$21 {
+
+    static final MemoryAddress NULL$ADDR = MemoryAddress.ofLong(0L);
+    static final MemorySegment _P_tmpdir$SEGMENT = RuntimeHelper.CONSTANT_ALLOCATOR.allocateUtf8String("\\");
+    static final MemorySegment P_tmpdir$SEGMENT = RuntimeHelper.CONSTANT_ALLOCATOR.allocateUtf8String("\\");
+    static final MemorySegment _wP_tmpdir$SEGMENT = RuntimeHelper.CONSTANT_ALLOCATOR.allocateUtf8String("\\");
+}
+
+

java-panama/src/main/java/foreign/c/constants$3.java

@@ -0,0 +1,64 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$3 {
+
+    static final FunctionDescriptor __mingw_printf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __mingw_printf$MH = RuntimeHelper.downcallHandleVariadic(
+        "__mingw_printf",
+        constants$3.__mingw_printf$FUNC
+    );
+    static final FunctionDescriptor __mingw_sprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __mingw_sprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "__mingw_sprintf",
+        constants$3.__mingw_sprintf$FUNC
+    );
+    static final FunctionDescriptor __mingw_snprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __mingw_snprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "__mingw_snprintf",
+        constants$3.__mingw_snprintf$FUNC
+    );
+    static final FunctionDescriptor __mingw_vfprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __mingw_vfprintf$MH = RuntimeHelper.downcallHandle(
+        "__mingw_vfprintf",
+        constants$3.__mingw_vfprintf$FUNC
+    );
+    static final FunctionDescriptor __mingw_vprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __mingw_vprintf$MH = RuntimeHelper.downcallHandle(
+        "__mingw_vprintf",
+        constants$3.__mingw_vprintf$FUNC
+    );
+    static final FunctionDescriptor __mingw_vsprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __mingw_vsprintf$MH = RuntimeHelper.downcallHandle(
+        "__mingw_vsprintf",
+        constants$3.__mingw_vsprintf$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$4.java

@@ -0,0 +1,64 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$4 {
+
+    static final FunctionDescriptor __mingw_vsnprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __mingw_vsnprintf$MH = RuntimeHelper.downcallHandle(
+        "__mingw_vsnprintf",
+        constants$4.__mingw_vsnprintf$FUNC
+    );
+    static final FunctionDescriptor _mingw_output_format_control$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT
+    );
+    static final MethodHandle _mingw_output_format_control$MH = RuntimeHelper.downcallHandle(
+        "_mingw_output_format_control",
+        constants$4._mingw_output_format_control$FUNC
+    );
+    static final FunctionDescriptor fprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "fprintf",
+        constants$4.fprintf$FUNC
+    );
+    static final FunctionDescriptor printf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle printf$MH = RuntimeHelper.downcallHandleVariadic(
+        "printf",
+        constants$4.printf$FUNC
+    );
+    static final FunctionDescriptor sprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle sprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "sprintf",
+        constants$4.sprintf$FUNC
+    );
+    static final FunctionDescriptor vfprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vfprintf$MH = RuntimeHelper.downcallHandle(
+        "vfprintf",
+        constants$4.vfprintf$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$5.java

@@ -0,0 +1,63 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$5 {
+
+    static final FunctionDescriptor vprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vprintf$MH = RuntimeHelper.downcallHandle(
+        "vprintf",
+        constants$5.vprintf$FUNC
+    );
+    static final FunctionDescriptor vsprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vsprintf$MH = RuntimeHelper.downcallHandle(
+        "vsprintf",
+        constants$5.vsprintf$FUNC
+    );
+    static final FunctionDescriptor __msvcrt_fprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __msvcrt_fprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "__msvcrt_fprintf",
+        constants$5.__msvcrt_fprintf$FUNC
+    );
+    static final FunctionDescriptor __msvcrt_printf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __msvcrt_printf$MH = RuntimeHelper.downcallHandleVariadic(
+        "__msvcrt_printf",
+        constants$5.__msvcrt_printf$FUNC
+    );
+    static final FunctionDescriptor __msvcrt_sprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __msvcrt_sprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "__msvcrt_sprintf",
+        constants$5.__msvcrt_sprintf$FUNC
+    );
+    static final FunctionDescriptor __msvcrt_vfprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __msvcrt_vfprintf$MH = RuntimeHelper.downcallHandle(
+        "__msvcrt_vfprintf",
+        constants$5.__msvcrt_vfprintf$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$6.java

@@ -0,0 +1,67 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$6 {
+
+    static final FunctionDescriptor __msvcrt_vprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __msvcrt_vprintf$MH = RuntimeHelper.downcallHandle(
+        "__msvcrt_vprintf",
+        constants$6.__msvcrt_vprintf$FUNC
+    );
+    static final FunctionDescriptor __msvcrt_vsprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle __msvcrt_vsprintf$MH = RuntimeHelper.downcallHandle(
+        "__msvcrt_vsprintf",
+        constants$6.__msvcrt_vsprintf$FUNC
+    );
+    static final FunctionDescriptor _snprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _snprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "_snprintf",
+        constants$6._snprintf$FUNC
+    );
+    static final FunctionDescriptor _vsnprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _vsnprintf$MH = RuntimeHelper.downcallHandle(
+        "_vsnprintf",
+        constants$6._vsnprintf$FUNC
+    );
+    static final FunctionDescriptor _vscprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _vscprintf$MH = RuntimeHelper.downcallHandle(
+        "_vscprintf",
+        constants$6._vscprintf$FUNC
+    );
+    static final FunctionDescriptor snprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle snprintf$MH = RuntimeHelper.downcallHandleVariadic(
+        "snprintf",
+        constants$6.snprintf$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$7.java

@@ -0,0 +1,69 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$7 {
+
+    static final FunctionDescriptor vsnprintf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vsnprintf$MH = RuntimeHelper.downcallHandle(
+        "vsnprintf",
+        constants$7.vsnprintf$FUNC
+    );
+    static final FunctionDescriptor vscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vscanf$MH = RuntimeHelper.downcallHandle(
+        "vscanf",
+        constants$7.vscanf$FUNC
+    );
+    static final FunctionDescriptor vfscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vfscanf$MH = RuntimeHelper.downcallHandle(
+        "vfscanf",
+        constants$7.vfscanf$FUNC
+    );
+    static final FunctionDescriptor vsscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle vsscanf$MH = RuntimeHelper.downcallHandle(
+        "vsscanf",
+        constants$7.vsscanf$FUNC
+    );
+    static final FunctionDescriptor getdelim$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle getdelim$MH = RuntimeHelper.downcallHandle(
+        "getdelim",
+        constants$7.getdelim$FUNC
+    );
+    static final FunctionDescriptor getline$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle getline$MH = RuntimeHelper.downcallHandle(
+        "getline",
+        constants$7.getline$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$8.java

@@ -0,0 +1,61 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$8 {
+
+    static final FunctionDescriptor fscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fscanf$MH = RuntimeHelper.downcallHandleVariadic(
+        "fscanf",
+        constants$8.fscanf$FUNC
+    );
+    static final FunctionDescriptor scanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle scanf$MH = RuntimeHelper.downcallHandleVariadic(
+        "scanf",
+        constants$8.scanf$FUNC
+    );
+    static final FunctionDescriptor sscanf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle sscanf$MH = RuntimeHelper.downcallHandleVariadic(
+        "sscanf",
+        constants$8.sscanf$FUNC
+    );
+    static final FunctionDescriptor fgetc$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fgetc$MH = RuntimeHelper.downcallHandle(
+        "fgetc",
+        constants$8.fgetc$FUNC
+    );
+    static final FunctionDescriptor fgets$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fgets$MH = RuntimeHelper.downcallHandle(
+        "fgets",
+        constants$8.fgets$FUNC
+    );
+    static final FunctionDescriptor fputc$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fputc$MH = RuntimeHelper.downcallHandle(
+        "fputc",
+        constants$8.fputc$FUNC
+    );
+}
+
+

java-panama/src/main/java/foreign/c/constants$9.java

@@ -0,0 +1,59 @@
+// Generated by jextract
+
+package foreign.c;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+import java.lang.foreign.*;
+import static java.lang.foreign.ValueLayout.*;
+class constants$9 {
+
+    static final FunctionDescriptor fputs$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle fputs$MH = RuntimeHelper.downcallHandle(
+        "fputs",
+        constants$9.fputs$FUNC
+    );
+    static final FunctionDescriptor gets$FUNC = FunctionDescriptor.of(Constants$root.C_POINTER$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle gets$MH = RuntimeHelper.downcallHandle(
+        "gets",
+        constants$9.gets$FUNC
+    );
+    static final FunctionDescriptor puts$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle puts$MH = RuntimeHelper.downcallHandle(
+        "puts",
+        constants$9.puts$FUNC
+    );
+    static final FunctionDescriptor ungetc$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle ungetc$MH = RuntimeHelper.downcallHandle(
+        "ungetc",
+        constants$9.ungetc$FUNC
+    );
+    static final FunctionDescriptor _filbuf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _filbuf$MH = RuntimeHelper.downcallHandle(
+        "_filbuf",
+        constants$9._filbuf$FUNC
+    );
+    static final FunctionDescriptor _flsbuf$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_LONG$LAYOUT,
+        Constants$root.C_POINTER$LAYOUT
+    );
+    static final MethodHandle _flsbuf$MH = RuntimeHelper.downcallHandle(
+        "_flsbuf",
+        constants$9._flsbuf$FUNC
+    );
+}
+
+

java-panama/src/main/resources/hello.c

@@ -0,0 +1,5 @@
+#include <stdio.h>
+int main() {
+   printf("Hello World from Project Panama Baeldung Article");
+   return 0;
+}