About exif metadata

[guvenacar]

I want to read and write metadata information of Jpeg files in byte or binary format. How can I find where the exif information starts and ends when I open a jpeg file in byte format? Does the Start Of Scan section in the diagram below mean that image pixels (RGB) are located in this area? I think this diagram represents a jpeg model without exif. If it contained exif information, where would it appear in the diagram below? Thanks.

[angea]

an App0 segment, followed by an App1 segment containing Exif data in an TIFF-like IFD...

[guvenacar]

Thanks angea.