= csv: comma-separated values     include "bufio.m";    include "csv.m";    csv := load CSV CSV->PATH;     init:    fn(bufio: Bufio);    getline: fn(fd: ref Bufio->Iobuf): list of string;    quote:   fn(s: string): string; CSV  provides  a few functions to help read and write data in``comma-separated value''  format.   The  csv  format  has  asequence  of  fields on a line (terminated by a newline, car‐riage return, or carriage return and  newline).   Fields  areseparated  by  commas, and may be empty.  A field that startswith a double-quote is a quoted field, continuing to the nextlone double-quote character, including commas and line termi‐nators, but taking two double-quotes to represent one double-quote.   Any text following quoted text, up to the next commaor line terminator, is included in  the  field  value.   Notethat in a field that does not start with a double-quote, dou‐ble-quotes are not treated specially. Init must be called before any other operation of the module.Bufio  is  the instance of the bufio(2) module that will pro‐vide the open files to be read. Getline reads a sequence of fields in csv format  from  Iobuffd, unquotes fields as required, and returns them in order ina list.  It returns nil on end-of-file (or read  error).   Anempty line is regarded as containing a single empty field. Quote  returns string s quoted as required by the csv format:the result is quoted if s contains comma, newline, or a quote(and all embedded quotes are doubled). == source/appl/lib/csv.b == see ALSOsh-csv(1)