Add support for Cap'n Proto for the c++ language

Cap'n Proto is a 'cerialization protocol' similar to protobuf:
https://capnproto.org/index.html

This patch mainly focuses on the c++ support for the capnp protocol
keeping in mind the possibility to add other languages later.

Change-Id: Ib19a9df1f45f2787503197791ac597d06cc45e9d
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

14 files changed, 217 insertions, 0 deletions

diff --git a/tests/auto/blackbox/testdata/capnproto/bar.capnp b/tests/auto/blackbox/testdata/capnproto/bar.capnp
new file mode 100644
index 000000000..a0e8a0f8c
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/bar.capnp
@@ -0,0 +1,8 @@
+@0xc967c84bcca70a1d;
+
+using Foo = import "foo.capnp";
+
+struct Bar {
+  foo @0 :Foo.Foo;
+  # Use type "Foo" defined in foo.capnp.
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/baz.capnp b/tests/auto/blackbox/testdata/capnproto/baz.capnp
new file mode 100644
index 000000000..8b2fe4faf
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/baz.capnp
@@ -0,0 +1,8 @@
+@0xc967c84bcca70a1d;
+
+using Foo = import "/imports/foo.capnp";
+
+struct Baz {
+  foo @0 :Foo.Foo;
+  # Use type "Foo" defined in foo.capnp.
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/capnproto_absolute_import.cpp b/tests/auto/blackbox/testdata/capnproto/capnproto_absolute_import.cpp
new file mode 100644
index 000000000..0e8979eec
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/capnproto_absolute_import.cpp
@@ -0,0 +1,14 @@
+#include "baz.capnp.h"
+
+#include <capnp/message.h>
+
+int main()
+{
+    ::capnp::MallocMessageBuilder message;
+
+    auto baz = message.initRoot<Baz>();
+    auto foo = baz.initFoo();
+    foo.setStr("hello");
+
+    return 0;
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/capnproto_absolute_import.qbs b/tests/auto/blackbox/testdata/capnproto/capnproto_absolute_import.qbs
new file mode 100644
index 000000000..ee0903f73
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/capnproto_absolute_import.qbs
@@ -0,0 +1,18 @@
+CppApplication {
+    Depends { name: "capnproto.cpp"; required: false }
+    condition: {
+        var result = qbs.targetPlatform === qbs.hostPlatform;
+        if (!result)
+            console.info("targetPlatform differs from hostPlatform");
+        if (!capnproto.cpp.present)
+            console.info("capnproto is not present");
+        return result && capnproto.cpp.present;
+    }
+    cpp.minimumMacosVersion: "10.8"
+    capnproto.cpp.importPaths:  "."
+    files: [
+        "baz.capnp",
+        "capnproto_absolute_import.cpp",
+        "imports/foo.capnp",
+    ]
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/capnproto_cpp.cpp b/tests/auto/blackbox/testdata/capnproto/capnproto_cpp.cpp
new file mode 100644
index 000000000..b9f729955
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/capnproto_cpp.cpp
@@ -0,0 +1,13 @@
+#include "foo.capnp.h"
+
+#include <capnp/message.h>
+
+int main()
+{
+    ::capnp::MallocMessageBuilder message;
+
+    auto foo = message.initRoot<Foo>();
+    foo.setStr("hello");
+
+    return 0;
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/capnproto_cpp.qbs b/tests/auto/blackbox/testdata/capnproto/capnproto_cpp.qbs
new file mode 100644
index 000000000..d7ee1b4c9
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/capnproto_cpp.qbs
@@ -0,0 +1,16 @@
+CppApplication {
+    Depends { name: "capnproto.cpp"; required: false }
+    condition: {
+        var result = qbs.targetPlatform === qbs.hostPlatform;
+        if (!result)
+            console.info("targetPlatform differs from hostPlatform");
+        if (!capnproto.cpp.present)
+            console.info("capnproto is not present");
+        return result && capnproto.cpp.present;
+    }
+    cpp.minimumMacosVersion: "10.8"
+    files: [
+        "capnproto_cpp.cpp",
+        "foo.capnp"
+    ]
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/capnproto_relative_import.cpp b/tests/auto/blackbox/testdata/capnproto/capnproto_relative_import.cpp
new file mode 100644
index 000000000..5116bd3d6
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/capnproto_relative_import.cpp
@@ -0,0 +1,14 @@
+#include "bar.capnp.h"
+
+#include <capnp/message.h>
+
+int main()
+{
+    ::capnp::MallocMessageBuilder message;
+
+    auto bar = message.initRoot<Bar>();
+    auto foo = bar.initFoo();
+    foo.setStr("hello");
+
+    return 0;
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/capnproto_relative_import.qbs b/tests/auto/blackbox/testdata/capnproto/capnproto_relative_import.qbs
new file mode 100644
index 000000000..7c1991d8f
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/capnproto_relative_import.qbs
@@ -0,0 +1,17 @@
+CppApplication {
+    Depends { name: "capnproto.cpp"; required: false }
+    condition: {
+        var result = qbs.targetPlatform === qbs.hostPlatform;
+        if (!result)
+            console.info("targetPlatform differs from hostPlatform");
+        if (!capnproto.cpp.present)
+            console.info("capnproto is not present");
+        return result && capnproto.cpp.present;
+    }
+    cpp.minimumMacosVersion: "10.8"
+    files: [
+        "bar.capnp",
+        "capnproto_relative_import.cpp",
+        "foo.capnp",
+    ]
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/foo.capnp b/tests/auto/blackbox/testdata/capnproto/foo.capnp
new file mode 100644
index 000000000..146a2969f
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/foo.capnp
@@ -0,0 +1,6 @@
+@0x8a2efe67220790be;
+
+struct Foo {
+    num @0 :UInt32;
+    str @1 :Text;
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/greeter-client.cpp b/tests/auto/blackbox/testdata/capnproto/greeter-client.cpp
new file mode 100644
index 000000000..d3fcdb4e3
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/greeter-client.cpp
@@ -0,0 +1,25 @@
+#include "greeter.capnp.h"
+
+#include <capnp/ez-rpc.h>
+
+#include <iostream>
+
+int main(int argc, char *argv[])
+{
+        const char address[] = "localhost:5050";
+    capnp::EzRpcClient client(address);
+    Greeter::Client greeter = client.getMain<Greeter>();
+
+    auto& waitScope = client.getWaitScope();
+
+    for (int i = 0; i < 2; ++i) {
+        auto request = greeter.sayHelloRequest();
+        request.initRequest().setName("hello workd");
+        auto promise = request.send();
+
+        auto response = promise.wait(waitScope);
+        std::cout << response.getResponse().getName().cStr() << std::endl;
+    }
+
+    return 0;
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/greeter-server.cpp b/tests/auto/blackbox/testdata/capnproto/greeter-server.cpp
new file mode 100644
index 000000000..a7f482cc8
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/greeter-server.cpp
@@ -0,0 +1,27 @@
+#include "greeter.capnp.h"
+
+#include <capnp/ez-rpc.h>
+#include <capnp/message.h>
+
+#include <iostream>
+
+class GreeterImpl final: public Greeter::Server
+{
+public:
+    ::kj::Promise<void> sayHello(SayHelloContext context) override
+    {
+        auto response = context.getResults().initResponse();
+        response.setName(context.getParams().getRequest().getName());
+        return kj::READY_NOW;
+    };
+};
+
+int main(int argc, char *argv[])
+{
+        const char address[] = "localhost:5050";
+    capnp::EzRpcServer server(kj::heap<GreeterImpl>(), address);
+
+    auto& waitScope = server.getWaitScope();
+    // Run forever, accepting connections and handling requests.
+    kj::NEVER_DONE.wait(waitScope);
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/greeter.capnp b/tests/auto/blackbox/testdata/capnproto/greeter.capnp
new file mode 100644
index 000000000..b9188f634
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/greeter.capnp
@@ -0,0 +1,13 @@
+@0x85150b117366d14b;
+
+struct HelloRequest {
+    name @0 :Text;
+}
+
+struct HelloResponse {
+    name @0 :Text;
+}
+
+interface Greeter {
+    sayHello @0 (request: HelloRequest) -> (response: HelloResponse);
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/greeter_cpp.qbs b/tests/auto/blackbox/testdata/capnproto/greeter_cpp.qbs
new file mode 100644
index 000000000..cf95b968b
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/greeter_cpp.qbs
@@ -0,0 +1,32 @@
+Project {
+    CppApplication {
+        Depends { name: "capnproto.cpp"; required: false }
+        condition: {
+            var result = qbs.targetPlatform === qbs.hostPlatform;
+            if (!result)
+                console.info("targetPlatform differs from hostPlatform");
+            if (!capnproto.cpp.present)
+                console.info("capnproto is not present");
+            return result && capnproto.cpp.present;
+        }
+        name: "server"
+        consoleApplication: true
+        cpp.minimumMacosVersion: "10.8"
+        capnproto.cpp.useRpc: true
+        files: [
+            "greeter.capnp",
+            "greeter-server.cpp"
+        ]
+    }
+    CppApplication {
+        Depends { name: "capnproto.cpp"; required: false }
+        name: "client"
+        consoleApplication: true
+        capnproto.cpp.useRpc: true
+        cpp.minimumMacosVersion: "10.8"
+        files: [
+            "greeter.capnp",
+            "greeter-client.cpp"
+        ]
+    }
+}
diff --git a/tests/auto/blackbox/testdata/capnproto/imports/foo.capnp b/tests/auto/blackbox/testdata/capnproto/imports/foo.capnp
new file mode 100644
index 000000000..146a2969f
--- /dev/null
+++ b/tests/auto/blackbox/testdata/capnproto/imports/foo.capnp
@@ -0,0 +1,6 @@
+@0x8a2efe67220790be;
+
+struct Foo {
+    num @0 :UInt32;
+    str @1 :Text;
+}