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internal: use io.SeekStart, io.SeekCurrent, and io.SeekEnd

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Change-Id: I23ab738b73bc33d3b0b10013c3fadd95b5b24681
Reviewed-on: https://go-review.googlesource.com/c/go/+/436719
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
This commit is contained in:
cuiweixie 2022-09-29 21:46:56 +08:00 • committed by Gopher Robot
parent daf1612dc7
commit 1b5110268b
4 changed files with 7 additions and 7 deletions
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2
src/internal/coverage/decodecounter/decodecounterfile.go
View file

@ -63,7 +63,7 @@ func NewCounterDataReader(fn string, rs io.ReadSeeker) (*CounterDataReader, erro
}
// Seek back to just past the file header.
hsz := int64(unsafe.Sizeof(cdr.hdr))
if _, err := cdr.mr.Seek(hsz, os.SEEK_SET); err != nil {
if _, err := cdr.mr.Seek(hsz, io.SeekStart); err != nil {
return nil, err
}
// Read preamble for first segment.

2
src/internal/coverage/decodemeta/decodefile.go
View file

@ -213,7 +213,7 @@ func (r *CoverageMetaFileReader) GetPackagePayload(pkIdx uint32, payloadbuf []by
payload = make([]byte, 0, len)
}
payload = append(payload, make([]byte, len)...)
if _, err := r.f.Seek(int64(off), os.SEEK_SET); err != nil {
if _, err := r.f.Seek(int64(off), io.SeekStart); err != nil {
return nil, err
}
if _, err := io.ReadFull(r.f, payload); err != nil {

2
src/internal/coverage/encodemeta/encode.go
View file

@ -175,7 +175,7 @@ func (b *CoverageMetaDataBuilder) Emit(w io.WriteSeeker) ([16]byte, error) {
// Back-patch the length.
totalLength := uint32(off)
if _, err := w.Seek(0, os.SEEK_SET); err != nil {
if _, err := w.Seek(0, io.SeekStart); err != nil {
return digest, err
}
b.wrUint32(w, totalLength)

8
src/internal/coverage/slicewriter/slicewriter.go
View file

@ -6,7 +6,7 @@ package slicewriter
import (
"fmt"
"os"
"io"
)
// WriteSeeker is a helper object that implements the io.WriteSeeker
@ -37,20 +37,20 @@ func (sws *WriteSeeker) Write(p []byte) (n int, err error) {
// the slice will result in an error.
func (sws *WriteSeeker) Seek(offset int64, whence int) (int64, error) {
switch whence {
case os.SEEK_SET:
case io.SeekStart:
if sws.off != offset && (offset < 0 || offset >= int64(len(sws.payload))) {
return 0, fmt.Errorf("invalid seek: new offset %d (out of range [0 %d]", offset, len(sws.payload))
}
sws.off = offset
return offset, nil
case os.SEEK_CUR:
case io.SeekCurrent:
newoff := sws.off + offset
if newoff != sws.off && (newoff < 0 || newoff >= int64(len(sws.payload))) {
return 0, fmt.Errorf("invalid seek: new offset %d (out of range [0 %d]", newoff, len(sws.payload))
}
sws.off += offset
return sws.off, nil
case os.SEEK_END:
case io.SeekEnd:
newoff := int64(len(sws.payload)) + offset
if newoff != sws.off && (newoff < 0 || newoff >= int64(len(sws.payload))) {
return 0, fmt.Errorf("invalid seek: new offset %d (out of range [0 %d]", newoff, len(sws.payload))