From b0ff49fdd4ae82af5cf89180078ea7314072c29f Mon Sep 17 00:00:00 2001
From: cc <cc@localhost>
Date: Wed, 20 Aug 2025 18:59:47 -0700
Subject: Add binary file output function

---
 src/binfile.rs | 14 ++++++++++++++
 src/lib.rs     | 11 ++++-------
 2 files changed, 18 insertions(+), 7 deletions(-)
 create mode 100644 src/binfile.rs

diff --git a/src/binfile.rs b/src/binfile.rs
new file mode 100644
index 0000000..9b50a70
--- /dev/null
+++ b/src/binfile.rs
@@ -0,0 +1,14 @@
+pub fn dump_u32_vec(file_name: &str, data: Vec<u32>) -> Result<(), String> {
+    use std::fs::File;
+    use std::io::Write;
+    if let Ok(mut file) = File::create(file_name) {
+        for value in data {
+            if let Err(error) = file.write_all(&value.to_le_bytes()) {
+                return Err(error.to_string());
+            }
+        }
+    } else {
+        return Err(String::from("Error creating file"));
+    }
+    Ok(())
+}
diff --git a/src/lib.rs b/src/lib.rs
index 422d332..ee27191 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,7 @@
 pub mod tiff;
+mod binfile;
+
+pub use binfile::dump_u32_vec;
 
 pub const TEST_IMAGE_PATH: &str = "../test.tif";
 pub const TEST_OUTPUT_PATH: &str = "../test.bin";
@@ -77,15 +80,9 @@ mod tests {
 
     #[test]
     fn tiff_data_dump_test() {
-        use std::fs::File;
-        use std::io::Write;
         tiff::ignore_warnings();
         if let Some(standard_format) = tiff::as_standard_format(TEST_IMAGE_PATH) {
-            if let Ok(mut file) = File::create(TEST_OUTPUT_PATH) {
-                for value in standard_format {
-                    let _ = file.write_all(&value.to_le_bytes());
-                }
-            }
+            dump_u32_vec(TEST_OUTPUT_PATH, standard_format).expect("File output error");
         } else {
             assert!(false);
         }
-- 
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