[bun ffi] Support pointers

2 files changed, 28 insertions, 0 deletions

diff --git a/integration/bunjs-only-snippets/ffi-test.c b/integration/bunjs-only-snippets/ffi-test.c
index 4b2784a84..562d31784 100644
--- a/integration/bunjs-only-snippets/ffi-test.c
+++ b/integration/bunjs-only-snippets/ffi-test.c
@@ -1,5 +1,6 @@
 #include <stdbool.h>
 #include <stdint.h>
+#include <stdlib.h>
 
 bool returns_true();
 bool returns_false();
@@ -83,3 +84,13 @@ uint8_t add_uint8_t(uint8_t a, uint8_t b) { return a + b; }
 uint16_t add_uint16_t(uint16_t a, uint16_t b) { return a + b; }
 uint32_t add_uint32_t(uint32_t a, uint32_t b) { return a + b; }
 uint64_t add_uint64_t(uint64_t a, uint64_t b) { return a + b; }
+
+void *ptr_should_point_to_42_as_int32_t();
+void *ptr_should_point_to_42_as_int32_t() {
+  int32_t *ptr = malloc(sizeof(int32_t));
+  *ptr = 42;
+  return ptr;
+}
+
+bool does_pointer_equal_42_as_int32_t(int32_t *ptr);
+bool does_pointer_equal_42_as_int32_t(int32_t *ptr) { return *ptr == 42; }
diff --git a/integration/bunjs-only-snippets/ffi.test.js b/integration/bunjs-only-snippets/ffi.test.js
index 1a18ae2cd..cd51a4594 100644
--- a/integration/bunjs-only-snippets/ffi.test.js
+++ b/integration/bunjs-only-snippets/ffi.test.js
@@ -153,6 +153,16 @@ it("ffi run", () => {
       return_type: "uint32_t",
       params: ["uint32_t", "uint32_t"],
     },
+
+    does_pointer_equal_42_as_int32_t: {
+      return_type: "bool",
+      params: ["ptr"],
+    },
+
+    ptr_should_point_to_42_as_int32_t: {
+      return_type: "ptr",
+      params: [],
+    },
     // add_uint64_t: {
     //   return_type: "uint64_t",
     //   params: ["uint64_t", "uint64_t"],
@@ -197,6 +207,8 @@ it("ffi run", () => {
       add_uint16_t,
       add_uint32_t,
       add_uint64_t,
+      does_pointer_equal_42_as_int32_t,
+      ptr_should_point_to_42_as_int32_t,
     },
     close,
   } = Bun.dlopen("/tmp/bun-ffi-test.dylib", types);
@@ -236,6 +248,11 @@ it("ffi run", () => {
   expect(add_uint8_t(1, 1)).toBe(2);
   expect(add_uint16_t(1, 1)).toBe(2);
   expect(add_uint32_t(1, 1)).toBe(2);
+
+  const ptr = ptr_should_point_to_42_as_int32_t();
+  expect(ptr != 0).toBe(true);
+  expect(typeof ptr === "number").toBe(true);
+  expect(does_pointer_equal_42_as_int32_t(ptr)).toBe(true);
   //   expect(add_uint64_t(1, 1)).toBe(2);
   close();
 });