unable to read csv file content by delimiter

Summary:

User needs to attach a csv file as attachment and read content and add as line item using api.

I am able to read content from csv file but unable to store line by line content as array as there is no delimiter to detect new line.

Is there any solution to read csv file line by line and store it in an array ?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

CPQ Version: 23C Patch 5

Code Snippet (add any code snippets that support your topic, if applicable):

using function getattachmentData()