1 files changed, 0 insertions, 121 deletions
diff --git a/libgo/go/patch/git.go b/libgo/go/patch/git.go
deleted file mode 100644
index 5c233fbaebf..00000000000
--- a/libgo/go/patch/git.go
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright 2009 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 patch
-
-import (
-	"bytes"
-	"compress/zlib"
-	"crypto/sha1"
-	"encoding/git85"
-	"errors"
-	"fmt"
-	"io"
-)
-
-func gitSHA1(data []byte) []byte {
-	if len(data) == 0 {
-		// special case: 0 length is all zeros sum
-		return make([]byte, 20)
-	}
-	h := sha1.New()
-	fmt.Fprintf(h, "blob %d\x00", len(data))
-	h.Write(data)
-	return h.Sum(nil)
-}
-
-// BUG(rsc): The Git binary delta format is not implemented, only Git binary literals.
-
-// GitBinaryLiteral represents a Git binary literal diff.
-type GitBinaryLiteral struct {
-	OldSHA1 []byte // if non-empty, the SHA1 hash of the original
-	New     []byte // the new contents
-}
-
-// Apply implements the Diff interface's Apply method.
-func (d *GitBinaryLiteral) Apply(old []byte) ([]byte, error) {
-	if sum := gitSHA1(old); !bytes.HasPrefix(sum, d.OldSHA1) {
-		return nil, ErrPatchFailure
-	}
-	return d.New, nil
-}
-
-func unhex(c byte) uint8 {
-	switch {
-	case '0' <= c && c <= '9':
-		return c - '0'
-	case 'a' <= c && c <= 'f':
-		return c - 'a' + 10
-	case 'A' <= c && c <= 'F':
-		return c - 'A' + 10
-	}
-	return 255
-}
-
-func getHex(s []byte) (data []byte, rest []byte) {
-	n := 0
-	for n < len(s) && unhex(s[n]) != 255 {
-		n++
-	}
-	n &^= 1 // Only take an even number of hex digits.
-	data = make([]byte, n/2)
-	for i := range data {
-		data[i] = unhex(s[2*i])<<4 | unhex(s[2*i+1])
-	}
-	rest = s[n:]
-	return
-}
-
-// ParseGitBinary parses raw as a Git binary patch.
-func ParseGitBinary(raw []byte) (Diff, error) {
-	var oldSHA1, newSHA1 []byte
-	var sawBinary bool
-
-	for {
-		var first []byte
-		first, raw, _ = getLine(raw, 1)
-		first = bytes.TrimSpace(first)
-		if s, ok := skip(first, "index "); ok {
-			oldSHA1, s = getHex(s)
-			if s, ok = skip(s, ".."); !ok {
-				continue
-			}
-			newSHA1, s = getHex(s)
-			continue
-		}
-		if _, ok := skip(first, "GIT binary patch"); ok {
-			sawBinary = true
-			continue
-		}
-		if n, _, ok := atoi(first, "literal ", 10); ok && sawBinary {
-			data := make([]byte, n)
-			d := git85.NewDecoder(bytes.NewBuffer(raw))
-			z, err := zlib.NewReader(d)
-			if err != nil {
-				return nil, err
-			}
-			defer z.Close()
-			if _, err = io.ReadFull(z, data); err != nil {
-				if err == io.EOF {
-					err = io.ErrUnexpectedEOF
-				}
-				return nil, err
-			}
-			var buf [1]byte
-			m, err := z.Read(buf[0:])
-			if m != 0 || err != io.EOF {
-				return nil, errors.New("Git binary literal longer than expected")
-			}
-
-			if sum := gitSHA1(data); !bytes.HasPrefix(sum, newSHA1) {
-				return nil, errors.New("Git binary literal SHA1 mismatch")
-			}
-			return &GitBinaryLiteral{oldSHA1, data}, nil
-		}
-		if !sawBinary {
-			return nil, errors.New("unexpected Git patch header: " + string(first))
-		}
-	}
-	panic("unreachable")
-}