Merge pull request #427 from WebAssembly/c-api-nice

C API

1 files changed, 29 insertions, 0 deletions

diff --git a/test/example/c-api-hello-world.c b/test/example/c-api-hello-world.c
new file mode 100644
index 000000000..016c2404b
--- /dev/null
+++ b/test/example/c-api-hello-world.c
@@ -0,0 +1,29 @@
+
+#include <binaryen-c.h>
+
+// "hello world" type example: create a function that adds two i32s and returns the result
+
+int main() {
+  BinaryenModuleRef module = BinaryenModuleCreate();
+
+  // Creation a function type for  i32 (i32, i32)
+  BinaryenType params[2] = { BinaryenInt32(), BinaryenInt32() };
+  BinaryenFunctionTypeRef iii = BinaryenAddFunctionType(module, "iii", BinaryenInt32(), params, 2);
+
+  // Get the 0 and 1 arguments, and add them
+  BinaryenExpressionRef x = BinaryenGetLocal(module, 0, BinaryenInt32()),
+                        y = BinaryenGetLocal(module, 1, BinaryenInt32());
+  BinaryenExpressionRef add = BinaryenBinary(module, BinaryenAdd(), x, y);
+
+  // Create the add function
+  // Note: no additional local variables
+  // Note: no basic blocks here, we are an AST. The function body is just an expression node.
+  BinaryenFunctionRef adder = BinaryenAddFunction(module, "adder", iii, NULL, 0, add);
+
+  // Print it out
+  BinaryenModulePrint(module);
+
+  // Clean up the module, which owns all the objects we created above
+  BinaryenModuleDispose(module);
+}
+