1 files changed, 145 insertions, 0 deletions
diff --git a/vendor/github.com/blevesearch/zap/v14/write.go b/vendor/github.com/blevesearch/zap/v14/write.go
new file mode 100644
index 0000000000..77aefdbfc8
--- /dev/null
+++ b/vendor/github.com/blevesearch/zap/v14/write.go
@@ -0,0 +1,145 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package zap
+
+import (
+	"encoding/binary"
+	"io"
+
+	"github.com/RoaringBitmap/roaring"
+)
+
+// writes out the length of the roaring bitmap in bytes as varint
+// then writes out the roaring bitmap itself
+func writeRoaringWithLen(r *roaring.Bitmap, w io.Writer,
+	reuseBufVarint []byte) (int, error) {
+	buf, err := r.ToBytes()
+	if err != nil {
+		return 0, err
+	}
+
+	var tw int
+
+	// write out the length
+	n := binary.PutUvarint(reuseBufVarint, uint64(len(buf)))
+	nw, err := w.Write(reuseBufVarint[:n])
+	tw += nw
+	if err != nil {
+		return tw, err
+	}
+
+	// write out the roaring bytes
+	nw, err = w.Write(buf)
+	tw += nw
+	if err != nil {
+		return tw, err
+	}
+
+	return tw, nil
+}
+
+func persistFields(fieldsInv []string, w *CountHashWriter, dictLocs []uint64) (uint64, error) {
+	var rv uint64
+	var fieldsOffsets []uint64
+
+	for fieldID, fieldName := range fieldsInv {
+		// record start of this field
+		fieldsOffsets = append(fieldsOffsets, uint64(w.Count()))
+
+		// write out the dict location and field name length
+		_, err := writeUvarints(w, dictLocs[fieldID], uint64(len(fieldName)))
+		if err != nil {
+			return 0, err
+		}
+
+		// write out the field name
+		_, err = w.Write([]byte(fieldName))
+		if err != nil {
+			return 0, err
+		}
+	}
+
+	// now write out the fields index
+	rv = uint64(w.Count())
+	for fieldID := range fieldsInv {
+		err := binary.Write(w, binary.BigEndian, fieldsOffsets[fieldID])
+		if err != nil {
+			return 0, err
+		}
+	}
+
+	return rv, nil
+}
+
+// FooterSize is the size of the footer record in bytes
+// crc + ver + chunk + field offset + stored offset + num docs + docValueOffset
+const FooterSize = 4 + 4 + 4 + 8 + 8 + 8 + 8
+
+func persistFooter(numDocs, storedIndexOffset, fieldsIndexOffset, docValueOffset uint64,
+	chunkMode uint32, crcBeforeFooter uint32, writerIn io.Writer) error {
+	w := NewCountHashWriter(writerIn)
+	w.crc = crcBeforeFooter
+
+	// write out the number of docs
+	err := binary.Write(w, binary.BigEndian, numDocs)
+	if err != nil {
+		return err
+	}
+	// write out the stored field index location:
+	err = binary.Write(w, binary.BigEndian, storedIndexOffset)
+	if err != nil {
+		return err
+	}
+	// write out the field index location
+	err = binary.Write(w, binary.BigEndian, fieldsIndexOffset)
+	if err != nil {
+		return err
+	}
+	// write out the fieldDocValue location
+	err = binary.Write(w, binary.BigEndian, docValueOffset)
+	if err != nil {
+		return err
+	}
+	// write out 32-bit chunk factor
+	err = binary.Write(w, binary.BigEndian, chunkMode)
+	if err != nil {
+		return err
+	}
+	// write out 32-bit version
+	err = binary.Write(w, binary.BigEndian, Version)
+	if err != nil {
+		return err
+	}
+	// write out CRC-32 of everything upto but not including this CRC
+	err = binary.Write(w, binary.BigEndian, w.crc)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func writeUvarints(w io.Writer, vals ...uint64) (tw int, err error) {
+	buf := make([]byte, binary.MaxVarintLen64)
+	for _, val := range vals {
+		n := binary.PutUvarint(buf, val)
+		var nw int
+		nw, err = w.Write(buf[:n])
+		tw += nw
+		if err != nil {
+			return tw, err
+		}
+	}
+	return tw, err
+}