From 2e468fb47ac58c2d5724b84d9b41c7a36fc4f299 Mon Sep 17 00:00:00 2001
From: Vinzenz Schroeter <vinzenz.f.s@gmail.com>
Date: Sat, 12 Apr 2025 18:41:43 +0200
Subject: [PATCH] add sp_bitmap_from_bitvec

---
 include/servicepoint.h |  9 +++++++++
 src/bitmap.rs          | 18 ++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/include/servicepoint.h b/include/servicepoint.h
index 2b9b07c..51b00ca 100644
--- a/include/servicepoint.h
+++ b/include/servicepoint.h
@@ -388,6 +388,15 @@ void sp_bitmap_fill(Bitmap */*notnull*/ bitmap, bool value);
  */
 void sp_bitmap_free(Bitmap */*notnull*/ bitmap);
 
+/**
+ * Tries to convert the BitVec to a Bitmap.
+ *
+ * The provided BitVec gets consumed.
+ *
+ * Returns NULL in case of error.
+ */
+Bitmap *sp_bitmap_from_bitvec(size_t width, SPBitVec */*notnull*/ bitvec);
+
 /**
  * Gets the current value at the specified position in the [Bitmap].
  *
diff --git a/src/bitmap.rs b/src/bitmap.rs
index 988a6ce..f203395 100644
--- a/src/bitmap.rs
+++ b/src/bitmap.rs
@@ -68,6 +68,24 @@ pub unsafe extern "C" fn sp_bitmap_load(
     }
 }
 
+/// Tries to convert the BitVec to a Bitmap.
+///
+/// The provided BitVec gets consumed.
+///
+/// Returns NULL in case of error.
+#[no_mangle]
+pub unsafe extern "C" fn sp_bitmap_from_bitvec(
+    width: usize,
+    bitvec: NonNull<SPBitVec>,
+) -> *mut Bitmap {
+    let bitvec = unsafe { *Box::from_raw(bitvec.as_ptr()) };
+    if let Ok(bitmap) = Bitmap::from_bitvec(width, bitvec.0) {
+        heap_move(bitmap)
+    } else {
+        std::ptr::null_mut()
+    }
+}
+
 /// Clones a [Bitmap].
 #[no_mangle]
 pub unsafe extern "C" fn sp_bitmap_clone(