Ref: #2 Improve error message for API parse_exif()

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "nom-exif"
-version = "1.0.0"
+version = "1.0.1"
 edition = "2021"
 license-file = "LICENSE"
 description = "Exif/metadata parsing library written in pure Rust, both JPEG/HEIF/HEIC images and MOV/MP4 videos are supported."

src/exif/parser.rs

@@ -36,7 +36,9 @@ pub fn parse_exif<'a>(input: &'a [u8]) -> crate::Result<Exif> {
     };
 
     // parse ifd0
-    let (_, ifd0) = parser.parse_ifd(input.len() - remain.len())?;
+    let (_, ifd0) = parser
+        .parse_ifd(input.len() - remain.len())
+        .map_err(|e| format!("Parse exif failed; {e}"))?;
 
     let exif = Exif {
         header,

src/jpeg.rs

@@ -186,6 +186,7 @@ fn parse_segment<'a>(marker_code: u8, input: &'a [u8]) -> IResult<&'a [u8], Segm
 ///
 /// The returned data might include several other SOS markers if the image is a
 /// progressive JPEG.
+#[allow(dead_code)]
 fn read_image_data<T: Read + Seek>(mut reader: T) -> crate::Result<Vec<u8>> {
     let mut header = [0u8; 2];
     loop {