From: Matt Corallo <git@bluematt.me>
Date: Tue, 6 Oct 2020 22:42:38 +0000 (-0400)
Subject: Make slice-vec-len generic
X-Git-Tag: v0.0.1~133
X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=3c8a5831ab3290356772f64d9c853b017a6281eb;p=ldk-java

Make slice-vec-len generic
---

diff --git a/genbindings.py b/genbindings.py
index a5e9ec41..9c647a63 100755
--- a/genbindings.py
+++ b/genbindings.py
@@ -544,7 +544,7 @@ void __attribute__((destructor)) check_leaks() {
 	public static native void free_heap_ptr(long ptr);
 	public static native byte[] get_u8_slice_bytes(long slice_ptr);
 	public static native long bytes_to_u8_vec(byte[] bytes);
-	public static native long u8_vec_len(long vec);
+	public static native long vec_slice_len(long vec);
 
 """)
     out_c.write("""
@@ -576,7 +576,12 @@ JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * _
 	(*_env)->GetByteArrayRegion (_env, bytes, 0, vec->datalen, vec->data);
 	return (long)vec;
 }
-JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_u8_1vec_1len (JNIEnv * env, jclass _a, jlong ptr) {
+JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
+        // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
+	_Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
+	_Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
+	_Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
+	_Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
 	LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
 	return (long)vec->datalen;
 }
diff --git a/src/main/java/org/ldk/impl/bindings.java b/src/main/java/org/ldk/impl/bindings.java
index b9d228b0..f4eef6ba 100644
--- a/src/main/java/org/ldk/impl/bindings.java
+++ b/src/main/java/org/ldk/impl/bindings.java
@@ -13,7 +13,7 @@ public class bindings {
 	public static native void free_heap_ptr(long ptr);
 	public static native byte[] get_u8_slice_bytes(long slice_ptr);
 	public static native long bytes_to_u8_vec(byte[] bytes);
-	public static native long u8_vec_len(long vec);
+	public static native long vec_slice_len(long vec);
 
 	public static native long LDKSecretKey_new();
 
diff --git a/src/main/jni/bindings.c b/src/main/jni/bindings.c
index 732c134c..d8f24ee2 100644
--- a/src/main/jni/bindings.c
+++ b/src/main/jni/bindings.c
@@ -77,7 +77,12 @@ JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * _
 	(*_env)->GetByteArrayRegion (_env, bytes, 0, vec->datalen, vec->data);
 	return (long)vec;
 }
-JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_u8_1vec_1len (JNIEnv * env, jclass _a, jlong ptr) {
+JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
+        // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
+	_Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
+	_Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
+	_Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
+	_Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
 	LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
 	return (long)vec->datalen;
 }
diff --git a/src/main/jni/org_ldk_impl_bindings.h b/src/main/jni/org_ldk_impl_bindings.h
index 44fec81e..557d5443 100644
--- a/src/main/jni/org_ldk_impl_bindings.h
+++ b/src/main/jni/org_ldk_impl_bindings.h
@@ -57,10 +57,10 @@ JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec
 
 /*
  * Class:     org_ldk_impl_bindings
- * Method:    u8_vec_len
+ * Method:    vec_slice_len
  * Signature: (J)J
  */
-JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_u8_1vec_1len
+JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len
   (JNIEnv *, jclass, jlong);
 
 /*