Perl's best known library Terxt::CSV has both a pure-perl and a C implementation. Here is the C version https://github.com/Tux/Text-CSV_XS/blob/master/CSV_XS.

Perl's best known library Terxt::CSV has both a pure-perl and a C implementation. Here is the C version https://github.com/Tux/Text-CSV_XS/blob/master/CSV_XS.xs https://github.com/Tux/Text-CSV_XS/blob/master/CSV_XS.xs