mirror of
https://github.com/golang/go
synced 2024-10-04 19:21:21 -06:00
d65a5cce89
parsing and printing to new syntax. Use -oldparser to parse the old syntax, use -oldprinter to print the old syntax. 2) Change default gofmt formatting settings to use tabs for indentation only and to use spaces for alignment. This will make the code alignment insensitive to an editor's tabwidth. Use -spaces=false to use tabs for alignment. 3) Manually changed src/exp/parser/parser_test.go so that it doesn't try to parse the parser's source files using the old syntax (they have new syntax now). 4) gofmt -w src misc test/bench 4th set of files. R=rsc CC=golang-dev https://golang.org/cl/180049
78 lines
1.8 KiB
Go
78 lines
1.8 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package os
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import (
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"syscall"
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"unsafe"
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)
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const (
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blockSize = 4096 // TODO(r): use statfs
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)
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func clen(n []byte) int {
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for i := 0; i < len(n); i++ {
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if n[i] == 0 {
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return i
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}
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}
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return len(n)
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}
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func (file *File) Readdirnames(count int) (names []string, err Error) {
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// If this file has no dirinfo, create one.
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if file.dirinfo == nil {
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file.dirinfo = new(dirInfo)
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// The buffer must be at least a block long.
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// TODO(r): use fstatfs to find fs block size.
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file.dirinfo.buf = make([]byte, blockSize)
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}
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d := file.dirinfo
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size := count
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if size < 0 {
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size = 100
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}
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names = make([]string, 0, size) // Empty with room to grow.
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for count != 0 {
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// Refill the buffer if necessary
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if d.bufp >= d.nbuf {
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var errno int
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d.nbuf, errno = syscall.Getdents(file.fd, d.buf)
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if errno != 0 {
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return names, NewSyscallError("getdents", errno)
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}
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if d.nbuf <= 0 {
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break // EOF
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}
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d.bufp = 0
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}
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// Drain the buffer
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for count != 0 && d.bufp < d.nbuf {
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dirent := (*syscall.Dirent)(unsafe.Pointer(&d.buf[d.bufp]))
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d.bufp += int(dirent.Reclen)
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if dirent.Ino == 0 { // File absent in directory.
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continue
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}
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bytes := (*[len(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
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var name = string(bytes[0:clen(bytes)])
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if name == "." || name == ".." { // Useless names
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continue
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}
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count--
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if len(names) == cap(names) {
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nnames := make([]string, len(names), 2*len(names))
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for i := 0; i < len(names); i++ {
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nnames[i] = names[i]
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}
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names = nnames
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}
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names = names[0 : len(names)+1]
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names[len(names)-1] = name
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}
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}
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return names, nil
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}
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