Number of rows in SQL dump
You should be safely calculate using wc -l filename.sql
On windows you may use following in command prompt: findstr /R /N "^" filename.sql | find /C ":"


As such not a part of question but out of intereset, you can also list content of the 32G dump using mysqldumpsplitter:
mysqldumpsplitter.sh --source filename --desc [More how-tos]