c2047754c3
Compiler changes:
* Change map assignment to use mapassign and assign value directly.
* Change string iteration to use decoderune, faster for ASCII strings.
* Change makeslice to take int, and use makeslice64 for larger values.
* Add new noverflow field to hmap struct used for maps.
Unresolved problems, to be fixed later:
* Commented out test in go/types/sizes_test.go that doesn't compile.
* Commented out reflect.TestStructOf test for padding after zero-sized field.
Reviewed-on: https://go-review.googlesource.com/35231
gotools/:
Updates for Go 1.8rc1.
* Makefile.am (go_cmd_go_files): Add bug.go.
(s-zdefaultcc): Write defaultPkgConfig.
* Makefile.in: Rebuild.
From-SVN: r244456
103 lines
2.1 KiB
Go
103 lines
2.1 KiB
Go
// 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 os
|
|
|
|
import (
|
|
"io"
|
|
"sync/atomic"
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
//extern opendir
|
|
func libc_opendir(*byte) *syscall.DIR
|
|
|
|
//extern closedir
|
|
func libc_closedir(*syscall.DIR) int
|
|
|
|
// FIXME: pathconf returns long, not int.
|
|
//extern pathconf
|
|
func libc_pathconf(*byte, int) int
|
|
|
|
func clen(n []byte) int {
|
|
for i := 0; i < len(n); i++ {
|
|
if n[i] == 0 {
|
|
return i
|
|
}
|
|
}
|
|
return len(n)
|
|
}
|
|
|
|
var nameMax int32
|
|
|
|
func (file *File) readdirnames(n int) (names []string, err error) {
|
|
if file.dirinfo == nil {
|
|
p, err := syscall.BytePtrFromString(file.name)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
elen := int(atomic.LoadInt32(&nameMax))
|
|
if elen == 0 {
|
|
syscall.Entersyscall()
|
|
plen := libc_pathconf(p, syscall.PC_NAME_MAX)
|
|
syscall.Exitsyscall()
|
|
if plen < 1024 {
|
|
plen = 1024
|
|
}
|
|
var dummy syscall.Dirent
|
|
elen = int(unsafe.Offsetof(dummy.Name)) + plen + 1
|
|
atomic.StoreInt32(&nameMax, int32(elen))
|
|
}
|
|
|
|
syscall.Entersyscall()
|
|
r := libc_opendir(p)
|
|
errno := syscall.GetErrno()
|
|
syscall.Exitsyscall()
|
|
if r == nil {
|
|
return nil, &PathError{"opendir", file.name, errno}
|
|
}
|
|
|
|
file.dirinfo = new(dirInfo)
|
|
file.dirinfo.buf = make([]byte, elen)
|
|
file.dirinfo.dir = r
|
|
}
|
|
|
|
entryDirent := (*syscall.Dirent)(unsafe.Pointer(&file.dirinfo.buf[0]))
|
|
|
|
size := n
|
|
if size <= 0 {
|
|
size = 100
|
|
n = -1
|
|
}
|
|
|
|
names = make([]string, 0, size) // Empty with room to grow.
|
|
|
|
for n != 0 {
|
|
var dirent *syscall.Dirent
|
|
pr := &dirent
|
|
syscall.Entersyscall()
|
|
i := libc_readdir_r(file.dirinfo.dir, entryDirent, pr)
|
|
syscall.Exitsyscall()
|
|
if i != 0 {
|
|
return names, NewSyscallError("readdir_r", i)
|
|
}
|
|
if dirent == nil {
|
|
break // EOF
|
|
}
|
|
bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0]))
|
|
var name = string(bytes[0:clen(bytes[:])])
|
|
if name == "." || name == ".." { // Useless names
|
|
continue
|
|
}
|
|
names = append(names, name)
|
|
n--
|
|
}
|
|
if n >= 0 && len(names) == 0 {
|
|
return names, io.EOF
|
|
}
|
|
return names, nil
|
|
}
|