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scx1332 · Jul 16, 2024 · 77dd77f · 77dd77f
1 parent 280dc7a
commit 77dd77f
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/src/plan.rs b/src/plan.rs
@@ -30,8 +30,12 @@ pub fn plan_chunks(chunk_size: u64, file_size: u64) -> anyhow::Result<ChunkPlan>
 
 pub fn realize_plan(plan: ChunkPlan) -> anyhow::Result<()> {
     for i in 0..plan.start_chunks {
-        println!("Output chunk {}", i);
-        println!("Copy {} bytes", plan.chunk_size);
+        let dst_chunk_start = i * plan.chunk_size;
+        let dst_chunk_end = dst_chunk_start * plan.chunk_size;
+        let src_chunk_start = plan.file_size - ((i + 1) * plan.chunk_size);
+        let src_chunk_end = plan.file_size + plan.chunk_size;
+        println!("Output chunk {} - pos {}-{}", i, dst_chunk_start, dst_chunk_end);
+        println!("Copy {} bytes from {}-{} to {}-{}", plan.chunk_size, src_chunk_start, src_chunk_end, dst_chunk_start, dst_chunk_end);
         println!(
             "Truncate file to {} bytes",
             plan.file_size - ((i + 1) * plan.chunk_size)