Merge pull request #12 from clacke/ndn-cpp-c-bindings

 Problem: No ffi bindings for ndn-cpp-c

Author: sjmackenzie

ndn-cpp-c-bindings/common.rkt

@@ -0,0 +1,17 @@
+#lang racket/base
+
+(require ffi/unsafe)
+
+(require ndn-cpp-c-bindings/ffi)
+
+(provide (all-defined-out))
+
+(define ndn_Milliseconds _double)
+(define ndn_MillisecondsSince1970 _double)
+
+(define-ndn get-now-milliseconds (_fun -> ndn_MillisecondsSince1970) #:c-id ndn_getNowMilliseconds)
+
+
+(define MAX_NDN_PACKET_SIZE 8800)
+(define ndn_SHA256_DIGEST_SIZE 32)
+(define ndn_AES_128_BLOCK_SIZE 16)

ndn-cpp-c-bindings/default.nix

@@ -0,0 +1,10 @@
+{ pkgs ? import (import ../pins/nixpkgs) {}
+, ndn-cpp ? pkgs.callPackage ../ndn-cpp {}
+, racket2nix ? import (import ../pins/racket2nix) {}
+}:
+
+let
+  inherit (racket2nix) buildRacketPackage;
+in
+
+(buildRacketPackage ./.).overrideAttrs (oldAttrs: { LD_LIBRARY_PATH = "${ndn-cpp}/lib"; })

ndn-cpp-c-bindings/ffi.rkt

@@ -0,0 +1,10 @@
+#lang racket/base
+
+(require ffi/unsafe)
+(require ffi/unsafe/define)
+
+(provide (all-defined-out))
+
+(define ndn-lib (ffi-lib "libndn-c" "0"))
+
+(define-ffi-definer define-ndn ndn-lib)

ndn-cpp-c-bindings/info.rkt

@@ -0,0 +1,6 @@
+#lang setup/infotab
+
+(define collection "ndn-cpp-c-bindings")
+(define deps '("base"))
+(define racket-launcher-names '("test-ndn-cpp-c-bindings"))
+(define racket-launcher-libraries '("test/main.rkt"))

ndn-cpp-c-bindings/test/main.rkt

@@ -0,0 +1,6 @@
+#lang racket
+
+(require ndn-cpp-c-bindings/common)
+
+(module+ main
+  (printf "epoch milliseconds: ~a~n" (get-now-milliseconds)))