// Package csv reads and writes comma-separated values (CSV) files.
// There are many kinds of CSV files; this package supports the format
// described in RFC 4180.
//
// A csv file contains zero or more records of one or more fields per record.
// Each record is separated by the newline character. The final record may
// optionally be followed by a newline character.
//
// field1,field2,field3
//
// White space is considered part of a field.
//
// Carriage returns before newline characters are silently removed.
//
// Blank lines are ignored. A line with only whitespace characters (excluding
// the ending newline character) is not considered a blank line.
//
// Fields which start and stop with the quote character " are called
// quoted-fields. The beginning and ending quote are not part of the
// field.
//
// The source:
//
// normal string,"quoted-field"
//
// results in the fields
//
// {`normal string`, `quoted-field`}
//
// Within a quoted-field a quote character followed by a second quote
// character is considered a single quote.
//
// "the ""word"" is true","a ""quoted-field"""
//
// results in
//
// {`the "word" is true`, `a "quoted-field"`}
//
// Newlines and commas may be included in a quoted-field
//
// "Multi-line
// field","comma is ,"
//
// results in
//
// {`Multi-line
// field`, `comma is ,`}
//
This package is forked from encoding/csv from Go upstream, original package is under feature freeze and we had to expand the scope of CSV RFC for S3 Select CSV support.
// Modified to be used with MinIO. Main modifications include
// - Configurable 'quote' parameter
// - Performance improvements
// benchmark old ns/op new ns/op delta
// BenchmarkRead-8 2807 2189 -22.02%
// BenchmarkReadWithFieldsPerRecord-8 2802 2179 -22.23%
// BenchmarkReadWithoutFieldsPerRecord-8 2824 2181 -22.77%
// BenchmarkReadLargeFields-8 3584 3371 -5.94%
// BenchmarkReadReuseRecord-8 2044 1480 -27.59%
// BenchmarkReadReuseRecordWithFieldsPerRecord-8 2056 1483 -27.87%
// BenchmarkReadReuseRecordWithoutFieldsPerRecord-8 2047 1482 -27.60%
// BenchmarkReadReuseRecordLargeFields-8 2777 2594 -6.59%
