FFI compatible token interface (#48)

Author: jackcmay

ci/token.sh

@@ -9,6 +9,7 @@ set -e
     ./do.sh build token
     ./do.sh doc token
     ./do.sh test token
+    cc token/inc/token.h -o token/target/token.gch
 )
 
 (

token/Cargo.lock

@@ -13,13 +13,17 @@ edition = "2018"
 [dependencies]
 num-derive = "0.2"
 num-traits = "0.2"
+remove_dir_all = "=0.5.0"
 solana-sdk = { version = "=1.2.0", default-features = false, features=["program"] }
 solana-sdk-bpf-test = { path = "../bin/bpf-sdk/rust/test", default-features = false }
 thiserror = "1.0"
 
 [dev-dependencies]
 rand = { version = "0.7.0"}
 
+[build-dependencies]
+cbindgen = "0.14"
+
 [lib]
 name = "spl_token"
 crate-type = ["cdylib", "lib"]

token/Cargo.toml

@@ -0,0 +1,10 @@
+extern crate cbindgen;
+
+use std::env;
+
+fn main() {
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+    cbindgen::generate(&crate_dir)
+        .unwrap()
+        .write_to_file("inc/token.h");
+}

token/build.rs

@@ -0,0 +1,15 @@
+language = "C"
+header = "/* Autogenerated SPL Token program C Bindings */"
+pragma_once = true
+cpp_compat = true
+line_length = 80
+tab_width = 4
+style = "both"
+
+[export]
+prefix = "Token"
+include = ["Instruction", "State"]
+
+[parse]
+parse_deps = true
+include = ["solana-sdk"]