From c97c816133b42257d0bcf1ee4bd178bb2a7a2b9e Mon Sep 17 00:00:00 2001
From: Taras Madan <tarasmadan@google.com>
Date: Tue, 10 Sep 2024 12:16:33 +0200
Subject: vendor: update

---
 .../vtprotobuf/protohelpers/protohelpers.go        | 122 +++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 vendor/github.com/planetscale/vtprotobuf/protohelpers/protohelpers.go

(limited to 'vendor/github.com/planetscale/vtprotobuf/protohelpers')

diff --git a/vendor/github.com/planetscale/vtprotobuf/protohelpers/protohelpers.go b/vendor/github.com/planetscale/vtprotobuf/protohelpers/protohelpers.go
new file mode 100644
index 000000000..64bde83ed
--- /dev/null
+++ b/vendor/github.com/planetscale/vtprotobuf/protohelpers/protohelpers.go
@@ -0,0 +1,122 @@
+// Package protohelpers provides helper functions for encoding and decoding protobuf messages.
+// The spec can be found at https://protobuf.dev/programming-guides/encoding/.
+package protohelpers
+
+import (
+	"fmt"
+	"io"
+	"math/bits"
+)
+
+var (
+	// ErrInvalidLength is returned when decoding a negative length.
+	ErrInvalidLength = fmt.Errorf("proto: negative length found during unmarshaling")
+	// ErrIntOverflow is returned when decoding a varint representation of an integer that overflows 64 bits.
+	ErrIntOverflow = fmt.Errorf("proto: integer overflow")
+	// ErrUnexpectedEndOfGroup is returned when decoding a group end without a corresponding group start.
+	ErrUnexpectedEndOfGroup = fmt.Errorf("proto: unexpected end of group")
+)
+
+// EncodeVarint encodes a uint64 into a varint-encoded byte slice and returns the offset of the encoded value.
+// The provided offset is the offset after the last byte of the encoded value.
+func EncodeVarint(dAtA []byte, offset int, v uint64) int {
+	offset -= SizeOfVarint(v)
+	base := offset
+	for v >= 1<<7 {
+		dAtA[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	dAtA[offset] = uint8(v)
+	return base
+}
+
+// SizeOfVarint returns the size of the varint-encoded value.
+func SizeOfVarint(x uint64) (n int) {
+	return (bits.Len64(x|1) + 6) / 7
+}
+
+// SizeOfZigzag returns the size of the zigzag-encoded value.
+func SizeOfZigzag(x uint64) (n int) {
+	return SizeOfVarint(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+
+// Skip the first record of the byte slice and return the offset of the next record.
+func Skip(dAtA []byte) (n int, err error) {
+	l := len(dAtA)
+	iNdEx := 0
+	depth := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return 0, ErrIntOverflow
+			}
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if dAtA[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+		case 1:
+			iNdEx += 8
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if length < 0 {
+				return 0, ErrInvalidLength
+			}
+			iNdEx += length
+		case 3:
+			depth++
+		case 4:
+			if depth == 0 {
+				return 0, ErrUnexpectedEndOfGroup
+			}
+			depth--
+		case 5:
+			iNdEx += 4
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+		if iNdEx < 0 {
+			return 0, ErrInvalidLength
+		}
+		if depth == 0 {
+			return iNdEx, nil
+		}
+	}
+	return 0, io.ErrUnexpectedEOF
+}
-- 
cgit mrf-deployment