Version C header (#105)

Author: jackcmay

token/build.rs

@@ -4,7 +4,45 @@ use std::env;
 
 fn main() {
     let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
-    cbindgen::generate(&crate_dir)
+    let config = cbindgen::Config {
+        header: Some("/* Autogenerated SPL Token program C Bindings */".to_string()),
+        after_includes: Some(format!(
+            "{}{}{}",
+            format!(
+                "\n#define TOKEN_MAJOR_VERSION {}",
+                env!("CARGO_PKG_VERSION_MAJOR")
+            ),
+            format!(
+                "\n#define TOKEN_MINOR_VERSION {}",
+                env!("CARGO_PKG_VERSION_MINOR")
+            ),
+            format!(
+                "\n#define TOKEN_PATCH_VERSION {}",
+                env!("CARGO_PKG_VERSION_PATCH")
+            )
+        )),
+        language: cbindgen::Language::C,
+        line_length: 80,
+        style: cbindgen::Style::Both,
+        tab_width: 4,
+        cpp_compat: true,
+        pragma_once: true,
+        export: cbindgen::ExportConfig {
+            prefix: Some("Token_".to_string()),
+            include: vec!["TokenInstruction".to_string(), "State".to_string()],
+            ..cbindgen::ExportConfig::default()
+        },
+        parse: cbindgen::ParseConfig {
+            parse_deps: true,
+            include: Some(vec!["solana-sdk".to_string()]),
+            ..cbindgen::ParseConfig::default()
+        },
+        ..cbindgen::Config::default()
+    };
+    cbindgen::Builder::new()
+        .with_crate(crate_dir)
+        .with_config(config)
+        .generate()
         .unwrap()
         .write_to_file("inc/token.h");
 }

token/inc/token.h

@@ -7,6 +7,10 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+#define TOKEN_MAJOR_VERSION 0
+#define TOKEN_MINOR_VERSION 1
+#define TOKEN_PATCH_VERSION 0
+
 /**
  * Maximum number of multisignature signers (max N)
  */