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author | Ian Lance Taylor <ian@gcc.gnu.org> | 2011-12-07 01:11:29 +0000 |
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committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2011-12-07 01:11:29 +0000 |
commit | 9c63abc9a1d127f95162756467284cf76b47aff8 (patch) | |
tree | 84f27a6ab44d932e4b0455f18390b070b4de626e /libgo/go/csv/writer.go | |
parent | 374280238f934fa851273e2ee16ba53be890c6b8 (diff) | |
download | gcc-9c63abc9a1d127f95162756467284cf76b47aff8.zip gcc-9c63abc9a1d127f95162756467284cf76b47aff8.tar.gz gcc-9c63abc9a1d127f95162756467284cf76b47aff8.tar.bz2 |
libgo: Update to weekly 2011-11-09.
From-SVN: r182073
Diffstat (limited to 'libgo/go/csv/writer.go')
-rw-r--r-- | libgo/go/csv/writer.go | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/libgo/go/csv/writer.go b/libgo/go/csv/writer.go deleted file mode 100644 index 5ea20e1..0000000 --- a/libgo/go/csv/writer.go +++ /dev/null @@ -1,121 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package csv - -import ( - "bufio" - "io" - "strings" - "unicode" - "utf8" -) - -// A Writer writes records to a CSV encoded file. -// -// As returned by NewWriter, a Writer writes records terminated by a -// newline and uses ',' as the field delimiter. The exported fields can be -// changed to customize the details before the first call to Write or WriteAll. -// -// Comma is the field delimiter. -// -// If UseCRLF is true, the Writer ends each record with \r\n instead of \n. -type Writer struct { - Comma rune // Field delimiter (set to to ',' by NewWriter) - UseCRLF bool // True to use \r\n as the line terminator - w *bufio.Writer -} - -// NewWriter returns a new Writer that writes to w. -func NewWriter(w io.Writer) *Writer { - return &Writer{ - Comma: ',', - w: bufio.NewWriter(w), - } -} - -// Writer writes a single CSV record to w along with any necessary quoting. -// A record is a slice of strings with each string being one field. -func (w *Writer) Write(record []string) (err error) { - for n, field := range record { - if n > 0 { - if _, err = w.w.WriteRune(w.Comma); err != nil { - return - } - } - - // If we don't have to have a quoted field then just - // write out the field and continue to the next field. - if !w.fieldNeedsQuotes(field) { - if _, err = w.w.WriteString(field); err != nil { - return - } - continue - } - if err = w.w.WriteByte('"'); err != nil { - return - } - - for _, r1 := range field { - switch r1 { - case '"': - _, err = w.w.WriteString(`""`) - case '\r': - if !w.UseCRLF { - err = w.w.WriteByte('\r') - } - case '\n': - if w.UseCRLF { - _, err = w.w.WriteString("\r\n") - } else { - err = w.w.WriteByte('\n') - } - default: - _, err = w.w.WriteRune(r1) - } - if err != nil { - return - } - } - - if err = w.w.WriteByte('"'); err != nil { - return - } - } - if w.UseCRLF { - _, err = w.w.WriteString("\r\n") - } else { - err = w.w.WriteByte('\n') - } - return -} - -// Flush writes any buffered data to the underlying io.Writer. -func (w *Writer) Flush() { - w.w.Flush() -} - -// WriteAll writes multiple CSV records to w using Write and then calls Flush. -func (w *Writer) WriteAll(records [][]string) (err error) { - for _, record := range records { - err = w.Write(record) - if err != nil { - break - } - } - w.Flush() - return nil -} - -// fieldNeedsQuotes returns true if our field must be enclosed in quotes. -// Empty fields, files with a Comma, fields with a quote or newline, and -// fields which start with a space must be enclosed in quotes. -func (w *Writer) fieldNeedsQuotes(field string) bool { - if len(field) == 0 || strings.IndexRune(field, w.Comma) >= 0 || strings.IndexAny(field, "\"\r\n") >= 0 { - return true - } - - r1, _ := utf8.DecodeRuneInString(field) - return unicode.IsSpace(r1) -} |