Writer

[gorecfile.git] / w.go

diff --git a/w.go b/w.go
new file mode 100644 (file)
index 0000000..fd71e18
--- /dev/null
+++ b/w.go
@@ -0,0 +1,65 @@
+/*
+recfile -- GNU recutils'es recfiles parser on pure Go
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 3 of the License.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+// GNU recutils'es recfiles parser on pure Go
+package recfile
+
+import (
+       "io"
+       "strings"
+)
+
+type Writer struct {
+       w io.StringWriter
+}
+
+func NewWriter(w io.StringWriter) *Writer {
+       return &Writer{w}
+}
+
+func (w *Writer) RecordStart(fs ...Field) (written int, err error) {
+       return w.w.WriteString("\n")
+}
+
+func (w *Writer) WriteFields(fs ...Field) (written int, err error) {
+       var n int
+       for _, f := range fs {
+               n, err = w.w.WriteString(f.Name + ": " + strings.TrimLeft(f.Value, " ") + "\n")
+               written += n
+               if err != nil {
+                       return
+               }
+       }
+       return
+}
+
+func (w *Writer) WriteFieldMultiline(name string, lines []string) (written int, err error) {
+       var n int
+       n, err = w.w.WriteString(name + ": " + strings.TrimLeft(lines[0], " ") + "\n")
+       written += n
+       if err != nil {
+               return
+       }
+       for _, l := range lines[1:] {
+               n, err = w.w.WriteString("+ " + l + "\n")
+               written += n
+               if err != nil {
+                       return
+               }
+       }
+       return
+}