[WIP] Examples

Author: paulyoung

.gitignore

@@ -1,5 +1,5 @@
 .DS_Store
-/.build
+.build
 /Packages
 /*.xcodeproj
 xcuserdata/

Examples/API/Package.swift

@@ -0,0 +1,17 @@
+// swift-tools-version: 5.6
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+  name: "api",
+  products: [
+    .executable(name: "API", targets: ["API"])
+  ],
+  dependencies: [
+    .package(name: "CDK", path: "../../")
+  ],
+  targets: [
+    .executableTarget(name: "API", dependencies: ["CDK"])
+  ]
+)

Examples/API/Sources/API/main.swift

@@ -0,0 +1,6 @@
+import CDK
+
+@_cdecl("ic_init")
+func `init`() {
+    CDK.print("Hello Swift!")
+}

Sources/CDK/CDK.swift

@@ -1,6 +1,12 @@
 import IC
 
-@_cdecl("time")
+public func print(_ message: String) {
+    withUnsafePointer(to: message) { src in
+      let size = Int32(MemoryLayout.size(ofValue: message))
+      IC.debug_print(src, size)
+    }
+}
+
 public func time() -> Int64 {
     IC.time()
 }

Sources/IC/include/IC.h

@@ -5,11 +5,11 @@
 
 #if __wasm32__
 
+__attribute__((__import_module__("ic0"),__import_name__("debug_print")))
+extern void debug_print(const void *src, int32_t size);
+
 __attribute__((__import_module__("ic0"),__import_name__("time")))
 extern int64_t time(void);
 
-__attribute__((__import_module__("ic0"),__import_name__("debug_print")))
-extern void debug_print(int32_t src, int32_t size);
-
 #endif
 #endif /* ic_h */