From 04001770116ea64607db8bbca192ec0c5e1c6085 Mon Sep 17 00:00:00 2001
From: Ulf Lilleengen <ulf.lilleengen@gmail.com>
Date: Tue, 30 Apr 2024 14:06:10 +0200
Subject: [PATCH] fix number of chunks constant

---
 src/file.rs | 5 ++++-
 src/page.rs | 3 +--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/file.rs b/src/file.rs
index 948f201..f3d9d1e 100644
--- a/src/file.rs
+++ b/src/file.rs
@@ -10,8 +10,11 @@ pub use crate::page::ReadError;
 use crate::page::{ChunkHeader, DehydratedPageReader, Header, PageHeader, PageReader, PageWriter};
 use crate::types::{OptionPageID, PageID};
 
+
+pub(crate) const CHUNKS_PER_PAGE: usize = (PAGE_SIZE - PageHeader::SIZE - size_of::<DataHeader>()).div_ceil(MAX_CHUNK_SIZE + ChunkHeader::SIZE);
 pub const PAGE_MAX_PAYLOAD_SIZE: usize =
-    PAGE_SIZE - PageHeader::SIZE - size_of::<DataHeader>() - (page::CHUNKS_PER_PAGE * ChunkHeader::SIZE);
+    PAGE_SIZE - PageHeader::SIZE - (CHUNKS_PER_PAGE * ChunkHeader::SIZE) - size_of::<DataHeader>();
+
 
 pub type FileID = u8;
 
diff --git a/src/page.rs b/src/page.rs
index 5066dcd..89a8df5 100644
--- a/src/page.rs
+++ b/src/page.rs
@@ -59,7 +59,6 @@ pub(crate) const MAX_CHUNK_SIZE: usize = if config::MAX_CHUNK_SIZE > (PAGE_SIZE
 } else {
     config::MAX_CHUNK_SIZE
 };
-pub(crate) const CHUNKS_PER_PAGE: usize = (PAGE_SIZE - PageHeader::SIZE) / (MAX_CHUNK_SIZE + ChunkHeader::SIZE);
 
 async fn write_header<F: Flash, H: Header>(flash: &mut F, page_id: PageID, header: H) -> Result<(), F::Error> {
     assert!(size_of::<H>() <= MAX_HEADER_SIZE);
@@ -649,7 +648,7 @@ mod tests {
 
     const HEADER: TestHeader = TestHeader { foo: 123456 };
     const MAX_PAYLOAD: usize =
-        PAGE_SIZE - PageHeader::SIZE - size_of::<TestHeader>() - (ChunkHeader::SIZE * CHUNKS_PER_PAGE);
+        PAGE_SIZE - PageHeader::SIZE - size_of::<TestHeader>() - ChunkHeader::SIZE;
 
     #[test_log::test]
     fn test_crc32() {