1 files changed, 0 insertions, 157 deletions
diff --git a/vendor/github.com/ncruces/go-sqlite3/vfs/cksm.go b/vendor/github.com/ncruces/go-sqlite3/vfs/cksm.go
deleted file mode 100644
index 39493df99..000000000
--- a/vendor/github.com/ncruces/go-sqlite3/vfs/cksm.go
+++ /dev/null
@@ -1,157 +0,0 @@
-package vfs
-
-import (
-	"bytes"
-	"context"
-	_ "embed"
-	"encoding/binary"
-	"strconv"
-
-	"github.com/tetratelabs/wazero/api"
-
-	"github.com/ncruces/go-sqlite3/internal/util"
-	"github.com/ncruces/go-sqlite3/util/sql3util"
-)
-
-func cksmWrapFile(name *Filename, flags OpenFlag, file File) File {
-	// Checksum only main databases and WALs.
-	if flags&(OPEN_MAIN_DB|OPEN_WAL) == 0 {
-		return file
-	}
-
-	cksm := cksmFile{File: file}
-
-	if flags&OPEN_WAL != 0 {
-		main, _ := name.DatabaseFile().(cksmFile)
-		cksm.cksmFlags = main.cksmFlags
-	} else {
-		cksm.cksmFlags = new(cksmFlags)
-		cksm.isDB = true
-	}
-
-	return cksm
-}
-
-type cksmFile struct {
-	File
-	*cksmFlags
-	isDB bool
-}
-
-type cksmFlags struct {
-	computeCksm bool
-	verifyCksm  bool
-	inCkpt      bool
-	pageSize    int
-}
-
-func (c cksmFile) ReadAt(p []byte, off int64) (n int, err error) {
-	n, err = c.File.ReadAt(p, off)
-
-	// SQLite is reading the header of a database file.
-	if c.isDB && off == 0 && len(p) >= 100 &&
-		bytes.HasPrefix(p, []byte("SQLite format 3\000")) {
-		c.init(p)
-	}
-
-	// Verify checksums.
-	if c.verifyCksm && !c.inCkpt && len(p) == c.pageSize {
-		cksm1 := cksmCompute(p[:len(p)-8])
-		cksm2 := *(*[8]byte)(p[len(p)-8:])
-		if cksm1 != cksm2 {
-			return 0, _IOERR_DATA
-		}
-	}
-	return n, err
-}
-
-func (c cksmFile) WriteAt(p []byte, off int64) (n int, err error) {
-	// SQLite is writing the first page of a database file.
-	if c.isDB && off == 0 && len(p) >= 100 &&
-		bytes.HasPrefix(p, []byte("SQLite format 3\000")) {
-		c.init(p)
-	}
-
-	// Compute checksums.
-	if c.computeCksm && !c.inCkpt && len(p) == c.pageSize {
-		*(*[8]byte)(p[len(p)-8:]) = cksmCompute(p[:len(p)-8])
-	}
-
-	return c.File.WriteAt(p, off)
-}
-
-func (c cksmFile) Pragma(name string, value string) (string, error) {
-	switch name {
-	case "checksum_verification":
-		b, ok := sql3util.ParseBool(value)
-		if ok {
-			c.verifyCksm = b && c.computeCksm
-		}
-		if !c.verifyCksm {
-			return "0", nil
-		}
-		return "1", nil
-
-	case "page_size":
-		if c.computeCksm {
-			// Do not allow page size changes on a checksum database.
-			return strconv.Itoa(c.pageSize), nil
-		}
-	}
-	return "", _NOTFOUND
-}
-
-func (c cksmFile) DeviceCharacteristics() DeviceCharacteristic {
-	ret := c.File.DeviceCharacteristics()
-	if c.verifyCksm {
-		ret &^= IOCAP_SUBPAGE_READ
-	}
-	return ret
-}
-
-func (c cksmFile) fileControl(ctx context.Context, mod api.Module, op _FcntlOpcode, pArg ptr_t) _ErrorCode {
-	switch op {
-	case _FCNTL_CKPT_START:
-		c.inCkpt = true
-	case _FCNTL_CKPT_DONE:
-		c.inCkpt = false
-	}
-	if rc := vfsFileControlImpl(ctx, mod, c, op, pArg); rc != _NOTFOUND {
-		return rc
-	}
-	return vfsFileControlImpl(ctx, mod, c.File, op, pArg)
-}
-
-func (f *cksmFlags) init(header []byte) {
-	f.pageSize = 256 * int(binary.LittleEndian.Uint16(header[16:18]))
-	if r := header[20] == 8; r != f.computeCksm {
-		f.computeCksm = r
-		f.verifyCksm = r
-	}
-}
-
-func cksmCompute(a []byte) (cksm [8]byte) {
-	var s1, s2 uint32
-	for len(a) >= 8 {
-		s1 += binary.LittleEndian.Uint32(a[0:4]) + s2
-		s2 += binary.LittleEndian.Uint32(a[4:8]) + s1
-		a = a[8:]
-	}
-	if len(a) != 0 {
-		panic(util.AssertErr())
-	}
-	binary.LittleEndian.PutUint32(cksm[0:4], s1)
-	binary.LittleEndian.PutUint32(cksm[4:8], s2)
-	return
-}
-
-func (c cksmFile) SharedMemory() SharedMemory {
-	if f, ok := c.File.(FileSharedMemory); ok {
-		return f.SharedMemory()
-	}
-	return nil
-}
-
-func (c cksmFile) Unwrap() File {
-	return c.File
-}