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strings.Split: make the default to split all.

Browse Source 
Change the signature of Split to have no count,
assuming a full split, and rename the existing
Split with a count to SplitN.
Do the same to package bytes.
Add a gofix module.

R=adg, dsymonds, alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/4661051
This commit is contained in:
Rob Pike 2011-06-28 09:43:14 +10:00
parent 82a8afdf14
commit ebb1566a46
60 changed files with 296 additions and 120 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
misc/dashboard/builder/main.go
View File

@ -161,7 +161,7 @@ func NewBuilder(builder string) (*Builder, os.Error) {
b := &Builder{name: builder}
// get goos/goarch from builder string
s := strings.Split(builder, "-", 3)
s := strings.SplitN(builder, "-", 3)
if len(s) >= 2 {
b.goos, b.goarch = s[0], s[1]
} else {
@ -177,7 +177,7 @@ func NewBuilder(builder string) (*Builder, os.Error) {
if err != nil {
return nil, fmt.Errorf("readKeys %s (%s): %s", b.name, fn, err)
}
v := strings.Split(string(c), "\n", -1)
v := strings.Split(string(c), "\n")
b.key = v[0]
if len(v) >= 3 {
b.codeUsername, b.codePassword = v[1], v[2]
@ -392,7 +392,7 @@ func (b *Builder) envvWindows() []string {
skip[name] = true
}
for _, kv := range os.Environ() {
s := strings.Split(kv, "=", 2)
s := strings.SplitN(kv, "=", 2)
name := strings.ToUpper(s[0])
switch {
case name == "":
@ -602,7 +602,7 @@ var revisionRe = regexp.MustCompile(`^([^ ]+) +[0-9]+:([0-9a-f]+)$`)
// firstTag returns the hash and tag of the most recent tag matching re.
func firstTag(re *regexp.Regexp) (hash string, tag string, err os.Error) {
o, _, err := runLog(nil, "", goroot, "hg", "tags")
for _, l := range strings.Split(o, "\n", -1) {
for _, l := range strings.Split(o, "\n") {
if l == "" {
continue
}

10
src/cmd/cgo/gcc.go
View File

@ -66,7 +66,7 @@ func cname(s string) string {
// preamble. Multiple occurrences are concatenated with a separating space,
// even across files.
func (p *Package) ParseFlags(f *File, srcfile string) {
linesIn := strings.Split(f.Preamble, "\n", -1)
linesIn := strings.Split(f.Preamble, "\n")
linesOut := make([]string, 0, len(linesIn))
NextLine:
@ -78,7 +78,7 @@ NextLine:
}
l = strings.TrimSpace(l[4:])
fields := strings.Split(l, ":", 2)
fields := strings.SplitN(l, ":", 2)
if len(fields) != 2 {
fatalf("%s: bad #cgo line: %s", srcfile, line)
}
@ -275,7 +275,7 @@ func (p *Package) loadDefines(f *File) {
b.WriteString(f.Preamble)
stdout := p.gccDefines(b.Bytes())
for _, line := range strings.Split(stdout, "\n", -1) {
for _, line := range strings.Split(stdout, "\n") {
if len(line) < 9 || line[0:7] != "#define" {
continue
}
@ -397,7 +397,7 @@ func (p *Package) guessKinds(f *File) []*Name {
isConst[i] = true // until proven otherwise
}
for _, line := range strings.Split(stderr, "\n", -1) {
for _, line := range strings.Split(stderr, "\n") {
if len(line) < 9 || line[0:9] != "cgo-test:" {
// the user will see any compiler errors when the code is compiled later.
continue
@ -1188,7 +1188,7 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
if ss, ok := dwarfToName[s]; ok {
s = ss
}
s = strings.Join(strings.Split(s, " ", -1), "") // strip spaces
s = strings.Join(strings.Split(s, " "), "") // strip spaces
name := c.Ident("_Ctype_" + s)
typedef[name.Name] = t.Go
t.Go = name

2
src/cmd/cgo/out.go
View File

@ -148,7 +148,7 @@ func dynimport(obj string) {
fatalf("cannot load imported symbols from PE file %s: %v", obj, err)
}
for _, s := range sym {
ss := strings.Split(s, ":", -1)
ss := strings.Split(s, ":")
fmt.Printf("#pragma dynimport %s %s %q\n", ss[0], ss[0], strings.ToLower(ss[1]))
}
return

4
src/cmd/godoc/dirtrees.go
View File

@ -267,8 +267,8 @@ func (dir *Directory) lookupLocal(name string) *Directory {
// lookup looks for the *Directory for a given path, relative to dir.
func (dir *Directory) lookup(path string) *Directory {
d := strings.Split(dir.Path, string(filepath.Separator), -1)
p := strings.Split(path, string(filepath.Separator), -1)
d := strings.Split(dir.Path, string(filepath.Separator))
p := strings.Split(path, string(filepath.Separator))
i := 0
for i < len(d) {
if i >= len(p) || d[i] != p[i] {

2
src/cmd/godoc/godoc.go
View File

@ -160,7 +160,7 @@ func readDirList(filename string) ([]string, os.Error) {
}
return e == nil && isPkgDir(d)
}
list := canonicalizePaths(strings.Split(string(contents), "\n", -1), filter)
list := canonicalizePaths(strings.Split(string(contents), "\n"), filter)
// for each parent path, remove all it's children q
// (requirement for binary search to work when filtering)
i := 0

2
src/cmd/godoc/index.go
View File

@ -901,7 +901,7 @@ func isIdentifier(s string) bool {
// identifier, Lookup returns a LookupResult, and a list of alternative
// spellings, if any. If the query syntax is wrong, an error is reported.
func (x *Index) Lookup(query string) (match *LookupResult, alt *AltWords, err os.Error) {
ss := strings.Split(query, ".", -1)
ss := strings.Split(query, ".")
// check query syntax
for _, s := range ss {

1
src/cmd/gofix/Makefile
View File

@ -19,6 +19,7 @@ GOFILES=\
procattr.go\
reflect.go\
sortslice.go\
stringssplit.go\
typecheck.go\
include ../../Make.cmd

2
src/cmd/gofix/main.go
View File

@ -53,7 +53,7 @@ func main() {
if *allowedRewrites != "" {
allowed = make(map[string]bool)
for _, f := range strings.Split(*allowedRewrites, ",", -1) {
for _, f := range strings.Split(*allowedRewrites, ",") {
allowed[f] = true
}
}

71
src/cmd/gofix/stringssplit.go Normal file
View File

@ -0,0 +1,71 @@
// Copyright 2011 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 main
import (
"go/ast"
"go/token"
)
var stringssplitFix = fix{
"stringssplit",
stringssplit,
`Restore strings.Split to its original meaning and add strings.SplitN. Bytes too.
http://codereview.appspot.com/4661051
`,
}
func init() {
register(stringssplitFix)
}
func stringssplit(f *ast.File) bool {
if !imports(f, "bytes") && !imports(f, "strings") {
return false
}
fixed := false
walk(f, func(n interface{}) {
call, ok := n.(*ast.CallExpr)
// func Split(s, sep string, n int) []string
// func SplitAfter(s, sep string, n int) []string
if !ok || len(call.Args) != 3 {
return
}
// Is this our function?
switch {
case isPkgDot(call.Fun, "bytes", "Split"):
case isPkgDot(call.Fun, "bytes", "SplitAfter"):
case isPkgDot(call.Fun, "strings", "Split"):
case isPkgDot(call.Fun, "strings", "SplitAfter"):
default:
return
}
sel := call.Fun.(*ast.SelectorExpr)
args := call.Args
fixed = true // We're committed.
// Is the last argument -1? If so, drop the arg.
// (Actually we just look for a negative integer literal.)
// Otherwise, Split->SplitN and keep the arg.
final := args[2]
if unary, ok := final.(*ast.UnaryExpr); ok && unary.Op == token.SUB {
if lit, ok := unary.X.(*ast.BasicLit); ok {
// Is it an integer? If so, it's a negative integer and that's what we're after.
if lit.Kind == token.INT {
// drop the last arg.
call.Args = args[0:2]
return
}
}
}
// If not, rename and keep the argument list.
sel.Sel.Name += "N"
})
return fixed
}

51
src/cmd/gofix/stringssplit_test.go Normal file
View File

@ -0,0 +1,51 @@
// Copyright 2011 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 main
func init() {
addTestCases(stringssplitTests)
}
var stringssplitTests = []testCase{
{
Name: "stringssplit.0",
In: `package main
import (
"bytes"
"strings"
)
func f() {
bytes.Split(a, b, c)
bytes.Split(a, b, -1)
bytes.SplitAfter(a, b, c)
bytes.SplitAfter(a, b, -1)
strings.Split(a, b, c)
strings.Split(a, b, -1)
strings.SplitAfter(a, b, c)
strings.SplitAfter(a, b, -1)
}
`,
Out: `package main
import (
"bytes"
"strings"
)
func f() {
bytes.SplitN(a, b, c)
bytes.Split(a, b)
bytes.SplitAfterN(a, b, c)
bytes.SplitAfter(a, b)
strings.SplitN(a, b, c)
strings.Split(a, b)
strings.SplitAfterN(a, b, c)
strings.SplitAfter(a, b)
}
`,
},
}

4
src/cmd/gofix/testdata/reflect.template.go.in vendored
View File

@ -444,7 +444,7 @@ func (t *Template) newVariable(words []string) *variableElement {
bar := strings.IndexRune(lastWord, '|')
if bar >= 0 {
words[len(words)-1] = lastWord[0:bar]
formatters = strings.Split(lastWord[bar+1:], "|", -1)
formatters = strings.Split(lastWord[bar+1:], "|")
}
// We could remember the function address here and avoid the lookup later,
@ -705,7 +705,7 @@ func (t *Template) findVar(st *state, s string) reflect.Value {
if s == "@" {
return indirectPtr(data, numStars)
}
for _, elem := range strings.Split(s, ".", -1) {
for _, elem := range strings.Split(s, ".") {
// Look up field; data must be a struct or map.
data = t.lookup(st, data, elem)
if data == nil {

4
src/cmd/gofix/testdata/reflect.template.go.out vendored
View File

@ -444,7 +444,7 @@ func (t *Template) newVariable(words []string) *variableElement {
bar := strings.IndexRune(lastWord, '|')
if bar >= 0 {
words[len(words)-1] = lastWord[0:bar]
formatters = strings.Split(lastWord[bar+1:], "|", -1)
formatters = strings.Split(lastWord[bar+1:], "|")
}
// We could remember the function address here and avoid the lookup later,
@ -705,7 +705,7 @@ func (t *Template) findVar(st *state, s string) reflect.Value {
if s == "@" {
return indirectPtr(data, numStars)
}
for _, elem := range strings.Split(s, ".", -1) {
for _, elem := range strings.Split(s, ".") {
// Look up field; data must be a struct or map.
data = t.lookup(st, data, elem)
if !data.IsValid() {

4
src/cmd/gofmt/gofmt_test.go
View File

@ -20,8 +20,8 @@ func runTest(t *testing.T, dirname, in, out, flags string) {
// process flags
*simplifyAST = false
*rewriteRule = ""
for _, flag := range strings.Split(flags, " ", -1) {
elts := strings.Split(flag, "=", 2)
for _, flag := range strings.Split(flags, " ") {
elts := strings.SplitN(flag, "=", 2)
name := elts[0]
value := ""
if len(elts) == 2 {

2
src/cmd/gofmt/rewrite.go
View File

@ -22,7 +22,7 @@ func initRewrite() {
rewrite = nil // disable any previous rewrite
return
}
f := strings.Split(*rewriteRule, "->", -1)
f := strings.Split(*rewriteRule, "->")
if len(f) != 2 {
fmt.Fprintf(os.Stderr, "rewrite rule must be of the form 'pattern -> replacement'\n")
os.Exit(2)

4
src/cmd/goinstall/download.go
View File

@ -146,11 +146,11 @@ var vcsList = []*vcs{&git, &hg, &bzr, &svn}
// hostname - i.e. contains at least one '.' and the last part is at least 2
// characters.
func isRemote(pkg string) bool {
parts := strings.Split(pkg, "/", 2)
parts := strings.SplitN(pkg, "/", 2)
if len(parts) != 2 {
return false
}
parts = strings.Split(parts[0], ".", -1)
parts = strings.Split(parts[0], ".")
if len(parts) < 2 || len(parts[len(parts)-1]) < 2 {
return false
}

2
src/cmd/govet/govet.go
View File

@ -50,7 +50,7 @@ func main() {
flag.Parse()
if *printfuncs != "" {
for _, name := range strings.Split(*printfuncs, ",", -1) {
for _, name := range strings.Split(*printfuncs, ",") {
if len(name) == 0 {
flag.Usage()
}

2
src/cmd/goyacc/goyacc.go
View File

@ -2834,7 +2834,7 @@ func others() {
// copy yaccpar
fmt.Fprintf(ftable, "\n//line yaccpar:1\n")
parts := strings.Split(yaccpar, prefix+"run()", 2)
parts := strings.SplitN(yaccpar, prefix+"run()", 2)
fmt.Fprintf(ftable, "%v", parts[0])
ftable.Write(fcode.Bytes())
fmt.Fprintf(ftable, "%v", parts[1])

2
src/cmd/hgpatch/main.go
View File

@ -282,7 +282,7 @@ func hgModified() ([]string, os.Error) {
if err != nil {
return nil, err
}
return strings.Split(strings.TrimSpace(out), "\n", -1), nil
return strings.Split(strings.TrimSpace(out), "\n"), nil
}
// hgAdd adds name to the repository.

2
src/pkg/asn1/common.go
View File

@ -83,7 +83,7 @@ type fieldParameters struct {
// parseFieldParameters will parse it into a fieldParameters structure,
// ignoring unknown parts of the string.
func parseFieldParameters(str string) (ret fieldParameters) {
for _, part := range strings.Split(str, ",", -1) {
for _, part := range strings.Split(str, ",") {
switch {
case part == "optional":
ret.optional = true

42
src/pkg/bytes/bytes.go
View File

@ -212,24 +212,38 @@ func genSplit(s, sep []byte, sepSave, n int) [][]byte {
return a[0 : na+1]
}
// Split slices s into subslices separated by sep and returns a slice of
// SplitN slices s into subslices separated by sep and returns a slice of
// the subslices between those separators.
// If sep is empty, SplitN splits after each UTF-8 sequence.
// The count determines the number of subslices to return:
// n > 0: at most n subslices; the last subslice will be the unsplit remainder.
// n == 0: the result is nil (zero subslices)
// n < 0: all subslices
func SplitN(s, sep []byte, n int) [][]byte { return genSplit(s, sep, 0, n) }
// SplitAfterN slices s into subslices after each instance of sep and
// returns a slice of those subslices.
// If sep is empty, SplitAfterN splits after each UTF-8 sequence.
// The count determines the number of subslices to return:
// n > 0: at most n subslices; the last subslice will be the unsplit remainder.
// n == 0: the result is nil (zero subslices)
// n < 0: all subslices
func SplitAfterN(s, sep []byte, n int) [][]byte {
return genSplit(s, sep, len(sep), n)
}
// Split slices s into all subslices separated by sep and returns a slice of
// the subslices between those separators.
// If sep is empty, Split splits after each UTF-8 sequence.
// The count determines the number of subslices to return:
// n > 0: at most n subslices; the last subslice will be the unsplit remainder.
// n == 0: the result is nil (zero subslices)
// n < 0: all subslices
func Split(s, sep []byte, n int) [][]byte { return genSplit(s, sep, 0, n) }
// It is equivalent to SplitN with a count of -1.
func Split(s, sep []byte) [][]byte { return genSplit(s, sep, 0, -1) }
// SplitAfter slices s into subslices after each instance of sep and
// SplitAfter slices s into all subslices after each instance of sep and
// returns a slice of those subslices.
// If sep is empty, Split splits after each UTF-8 sequence.
// The count determines the number of subslices to return:
// n > 0: at most n subslices; the last subslice will be the unsplit remainder.
// n == 0: the result is nil (zero subslices)
// n < 0: all subslices
func SplitAfter(s, sep []byte, n int) [][]byte {
return genSplit(s, sep, len(sep), n)
// If sep is empty, SplitAfter splits after each UTF-8 sequence.
// It is equivalent to SplitAfterN with a count of -1.
func SplitAfter(s, sep []byte) [][]byte {
return genSplit(s, sep, len(sep), -1)
}
// Fields splits the array s around each instance of one or more consecutive white space

19
src/pkg/bytes/bytes_test.go
View File

@ -6,6 +6,7 @@ package bytes_test
import (
. "bytes"
"reflect"
"testing"
"unicode"
"utf8"
@ -315,7 +316,7 @@ var explodetests = []ExplodeTest{
func TestExplode(t *testing.T) {
for _, tt := range explodetests {
a := Split([]byte(tt.s), nil, tt.n)
a := SplitN([]byte(tt.s), nil, tt.n)
result := arrayOfString(a)
if !eq(result, tt.a) {
t.Errorf(`Explode("%s", %d) = %v; want %v`, tt.s, tt.n, result, tt.a)
@ -354,7 +355,7 @@ var splittests = []SplitTest{
func TestSplit(t *testing.T) {
for _, tt := range splittests {
a := Split([]byte(tt.s), []byte(tt.sep), tt.n)
a := SplitN([]byte(tt.s), []byte(tt.sep), tt.n)
result := arrayOfString(a)
if !eq(result, tt.a) {
t.Errorf(`Split(%q, %q, %d) = %v; want %v`, tt.s, tt.sep, tt.n, result, tt.a)
@ -367,6 +368,12 @@ func TestSplit(t *testing.T) {
if string(s) != tt.s {
t.Errorf(`Join(Split(%q, %q, %d), %q) = %q`, tt.s, tt.sep, tt.n, tt.sep, s)
}
if tt.n < 0 {
b := Split([]byte(tt.s), []byte(tt.sep))
if !reflect.DeepEqual(a, b) {
t.Errorf("Split disagrees withSplitN(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, b, a)
}
}
}
}
@ -388,7 +395,7 @@ var splitaftertests = []SplitTest{
func TestSplitAfter(t *testing.T) {
for _, tt := range splitaftertests {
a := SplitAfter([]byte(tt.s), []byte(tt.sep), tt.n)
a := SplitAfterN([]byte(tt.s), []byte(tt.sep), tt.n)
result := arrayOfString(a)
if !eq(result, tt.a) {
t.Errorf(`Split(%q, %q, %d) = %v; want %v`, tt.s, tt.sep, tt.n, result, tt.a)
@ -398,6 +405,12 @@ func TestSplitAfter(t *testing.T) {
if string(s) != tt.s {
t.Errorf(`Join(Split(%q, %q, %d), %q) = %q`, tt.s, tt.sep, tt.n, tt.sep, s)
}
if tt.n < 0 {
b := SplitAfter([]byte(tt.s), []byte(tt.sep))
if !reflect.DeepEqual(a, b) {
t.Errorf("SplitAfter disagrees withSplitAfterN(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, b, a)
}
}
}
}

2
src/pkg/compress/lzw/reader_test.go
View File

@ -84,7 +84,7 @@ var lzwTests = []lzwTest{
func TestReader(t *testing.T) {
b := bytes.NewBuffer(nil)
for _, tt := range lzwTests {
d := strings.Split(tt.desc, ";", -1)
d := strings.Split(tt.desc, ";")
var order Order
switch d[1] {
case "LSB":

4
src/pkg/crypto/x509/verify.go
View File

@ -202,8 +202,8 @@ func matchHostnames(pattern, host string) bool {
return false
}
patternParts := strings.Split(pattern, ".", -1)
hostParts := strings.Split(host, ".", -1)
patternParts := strings.Split(pattern, ".")
hostParts := strings.Split(host, ".")
if len(patternParts) != len(hostParts) {
return false

2
src/pkg/debug/proc/proc_linux.go
View File

@ -1229,7 +1229,7 @@ func (p *process) attachAllThreads() os.Error {
return err
}
statParts := strings.Split(string(statFile), " ", 4)
statParts := strings.SplitN(string(statFile), " ", 4)
if len(statParts) > 2 && statParts[2] == "Z" {
// tid is a zombie
p.logTrace("thread %d is a zombie", tid)

2
src/pkg/exec/exec_test.go
View File

@ -55,7 +55,7 @@ func TestCatGoodAndBadFile(t *testing.T) {
t.Errorf("expected Waitmsg from cat combined; got %T: %v", err, err)
}
s := string(bs)
sp := strings.Split(s, "\n", 2)
sp := strings.SplitN(s, "\n", 2)
if len(sp) != 2 {
t.Fatalf("expected two lines from cat; got %q", s)
}

2
src/pkg/exec/lp_plan9.go
View File

@ -42,7 +42,7 @@ func LookPath(file string) (string, os.Error) {
}
path := os.Getenv("path")
for _, dir := range strings.Split(path, "\000", -1) {
for _, dir := range strings.Split(path, "\000") {
if err := findExecutable(dir + "/" + file); err == nil {
return dir + "/" + file, nil
}

2
src/pkg/exec/lp_unix.go
View File

@ -39,7 +39,7 @@ func LookPath(file string) (string, os.Error) {
return "", &Error{file, err}
}
pathenv := os.Getenv("PATH")
for _, dir := range strings.Split(pathenv, ":", -1) {
for _, dir := range strings.Split(pathenv, ":") {
if dir == "" {
// Unix shell semantics: path element "" means "."
dir = "."

4
src/pkg/exec/lp_windows.go
View File

@ -47,7 +47,7 @@ func LookPath(file string) (f string, err os.Error) {
x = `.COM;.EXE;.BAT;.CMD`
}
exts := []string{}
for _, e := range strings.Split(strings.ToLower(x), `;`, -1) {
for _, e := range strings.Split(strings.ToLower(x), `;`) {
if e == "" {
continue
}
@ -67,7 +67,7 @@ func LookPath(file string) (f string, err os.Error) {
return
}
} else {
for _, dir := range strings.Split(pathenv, `;`, -1) {
for _, dir := range strings.Split(pathenv, `;`) {
if f, err = findExecutable(dir+`\`+file, exts); err == nil {
return
}

2
src/pkg/exp/ogle/cmd.go
View File

@ -154,7 +154,7 @@ func cmdLoad(args []byte) os.Error {
}
println("Attached to", pid)
} else {
parts := strings.Split(path, " ", -1)
parts := strings.Split(path, " ")
if len(parts) == 0 {
fname = ""
} else {

2
src/pkg/go/ast/print_test.go
View File

@ -53,7 +53,7 @@ var tests = []struct {
// Split s into lines, trim whitespace from all lines, and return
// the concatenated non-empty lines.
func trim(s string) string {
lines := strings.Split(s, "\n", -1)
lines := strings.Split(s, "\n")
i := 0
for _, line := range lines {
line = strings.TrimSpace(line)

2
src/pkg/go/build/dir.go
View File

@ -139,7 +139,7 @@ func goodOSArch(filename string) bool {
if dot := strings.Index(filename, "."); dot != -1 {
filename = filename[:dot]
}
l := strings.Split(filename, "_", -1)
l := strings.Split(filename, "_")
n := len(l)
if n == 0 {
return true

2
src/pkg/go/doc/comment.go
View File

@ -58,7 +58,7 @@ func CommentText(comment *ast.CommentGroup) string {
}
// Split on newlines.
cl := strings.Split(c, "\n", -1)
cl := strings.Split(c, "\n")
// Walk lines, stripping trailing white space and adding to list.
for _, l := range cl {

2
src/pkg/html/token_test.go
View File

@ -161,7 +161,7 @@ func TestTokenizer(t *testing.T) {
loop:
for _, tt := range tokenTests {
z := NewTokenizer(bytes.NewBuffer([]byte(tt.html)))
for i, s := range strings.Split(tt.golden, "$", -1) {
for i, s := range strings.Split(tt.golden, "$") {
if z.Next() == ErrorToken {
t.Errorf("%s token %d: want %q got error %v", tt.desc, i, s, z.Error())
continue loop

2
src/pkg/http/cgi/host.go
View File

@ -197,7 +197,7 @@ func (h *Handler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
if len(line) == 0 {
break
}
parts := strings.Split(string(line), ":", 2)
parts := strings.SplitN(string(line), ":", 2)
if len(parts) < 2 {
h.printf("cgi: bogus header line: %s", string(line))
continue

2
src/pkg/http/cgi/host_test.go
View File

@ -46,7 +46,7 @@ readlines:
}
linesRead++
trimmedLine := strings.TrimRight(line, "\r\n")
split := strings.Split(trimmedLine, "=", 2)
split := strings.SplitN(trimmedLine, "=", 2)
if len(split) != 2 {
t.Fatalf("Unexpected %d parts from invalid line number %v: %q; existing map=%v",
len(split), linesRead, line, m)

4
src/pkg/http/cookie.go
View File

@ -41,7 +41,7 @@ type Cookie struct {
func readSetCookies(h Header) []*Cookie {
cookies := []*Cookie{}
for _, line := range h["Set-Cookie"] {
parts := strings.Split(strings.TrimSpace(line), ";", -1)
parts := strings.Split(strings.TrimSpace(line), ";")
if len(parts) == 1 && parts[0] == "" {
continue
}
@ -175,7 +175,7 @@ func readCookies(h Header, filter string) []*Cookie {
}
for _, line := range lines {
parts := strings.Split(strings.TrimSpace(line), ";", -1)
parts := strings.Split(strings.TrimSpace(line), ";")
if len(parts) == 1 && parts[0] == "" {
continue
}

2
src/pkg/http/fs.go
View File

@ -259,7 +259,7 @@ func parseRange(s string, size int64) ([]httpRange, os.Error) {
return nil, os.NewError("invalid range")
}
var ranges []httpRange
for _, ra := range strings.Split(s[len(b):], ",", -1) {
for _, ra := range strings.Split(s[len(b):], ",") {
i := strings.Index(ra, "-")
if i < 0 {
return nil, os.NewError("invalid range")

8
src/pkg/http/request.go
View File

@ -543,7 +543,7 @@ func ReadRequest(b *bufio.Reader) (req *Request, err os.Error) {
}
var f []string
if f = strings.Split(s, " ", 3); len(f) < 3 {
if f = strings.SplitN(s, " ", 3); len(f) < 3 {
return nil, &badStringError{"malformed HTTP request", s}
}
req.Method, req.RawURL, req.Proto = f[0], f[1], f[2]
@ -662,11 +662,11 @@ func ParseQuery(query string) (m Values, err os.Error) {
}
func parseQuery(m Values, query string) (err os.Error) {
for _, kv := range strings.Split(query, "&", -1) {
for _, kv := range strings.Split(query, "&") {
if len(kv) == 0 {
continue
}
kvPair := strings.Split(kv, "=", 2)
kvPair := strings.SplitN(kv, "=", 2)
var key, value string
var e os.Error
@ -703,7 +703,7 @@ func (r *Request) ParseForm() (err os.Error) {
return os.NewError("missing form body")
}
ct := r.Header.Get("Content-Type")
switch strings.Split(ct, ";", 2)[0] {
switch strings.SplitN(ct, ";", 2)[0] {
case "text/plain", "application/x-www-form-urlencoded", "":
const maxFormSize = int64(10 << 20) // 10 MB is a lot of text.
b, e := ioutil.ReadAll(io.LimitReader(r.Body, maxFormSize+1))

2
src/pkg/http/response.go
View File

@ -95,7 +95,7 @@ func ReadResponse(r *bufio.Reader, req *Request) (resp *Response, err os.Error)
}
return nil, err
}
f := strings.Split(line, " ", 3)
f := strings.SplitN(line, " ", 3)
if len(f) < 2 {
return nil, &badStringError{"malformed HTTP response", line}
}

2
src/pkg/http/server.go
View File

@ -421,7 +421,7 @@ func errorKludge(w *response) {
msg += " would ignore this error page if this text weren't here.\n"
// Is it text? ("Content-Type" is always in the map)
baseType := strings.Split(w.header.Get("Content-Type"), ";", 2)[0]
baseType := strings.SplitN(w.header.Get("Content-Type"), ";", 2)[0]
switch baseType {
case "text/html":
io.WriteString(w, "<!-- ")

2
src/pkg/http/spdy/read.go
View File

@ -174,7 +174,7 @@ func parseHeaderValueBlock(r io.Reader, streamId uint32) (http.Header, os.Error)
if _, err := io.ReadFull(r, value); err != nil {
return nil, err
}
valueList := strings.Split(string(value), "\x00", -1)
valueList := strings.Split(string(value), "\x00")
for _, v := range valueList {
h.Add(name, v)
}

4
src/pkg/http/transfer.go
View File

@ -334,7 +334,7 @@ func fixTransferEncoding(requestMethod string, header Header) ([]string, os.Erro
return nil, nil
}
encodings := strings.Split(raw[0], ",", -1)
encodings := strings.Split(raw[0], ",")
te := make([]string, 0, len(encodings))
// TODO: Even though we only support "identity" and "chunked"
// encodings, the loop below is designed with foresight. One
@ -450,7 +450,7 @@ func fixTrailer(header Header, te []string) (Header, os.Error) {
header.Del("Trailer")
trailer := make(Header)
keys := strings.Split(raw, ",", -1)
keys := strings.Split(raw, ",")
for _, key := range keys {
key = CanonicalHeaderKey(strings.TrimSpace(key))
switch key {

4
src/pkg/http/transport.go
View File

@ -329,7 +329,7 @@ func (t *Transport) getConn(cm *connectMethod) (*persistConn, os.Error) {
return nil, err
}
if resp.StatusCode != 200 {
f := strings.Split(resp.Status, " ", 2)
f := strings.SplitN(resp.Status, " ", 2)
conn.Close()
return nil, os.NewError(f[1])
}
@ -383,7 +383,7 @@ func useProxy(addr string) bool {
addr = addr[:strings.LastIndex(addr, ":")]
}
for _, p := range strings.Split(no_proxy, ",", -1) {
for _, p := range strings.Split(no_proxy, ",") {
p = strings.ToLower(strings.TrimSpace(p))
if len(p) == 0 {
continue

4
src/pkg/http/url.go
View File

@ -508,8 +508,8 @@ func (v Values) Encode() string {
// resolvePath applies special path segments from refs and applies
// them to base, per RFC 2396.
func resolvePath(basepath string, refpath string) string {
base := strings.Split(basepath, "/", -1)
refs := strings.Split(refpath, "/", -1)
base := strings.Split(basepath, "/")
refs := strings.Split(refpath, "/")
if len(base) == 0 {
base = []string{""}
}

2
src/pkg/mail/message.go
View File

@ -425,7 +425,7 @@ func (p *addrParser) len() int {
}
func decodeRFC2047Word(s string) (string, os.Error) {
fields := strings.Split(s, "?", -1)
fields := strings.Split(s, "?")
if len(fields) != 5 || fields[0] != "=" || fields[4] != "=" {
return "", os.NewError("mail: address not RFC 2047 encoded")
}

2
src/pkg/mime/mediatype.go
View File

@ -134,7 +134,7 @@ func ParseMediaType(v string) (mediatype string, params map[string]string) {
}
func decode2231Enc(v string) string {
sv := strings.Split(v, "'", 3)
sv := strings.SplitN(v, "'", 3)
if len(sv) != 3 {
return ""
}

2
src/pkg/patch/patch.go
View File

@ -319,4 +319,4 @@ func hasPrefix(s []byte, t string) bool {
// splitLines returns the result of splitting s into lines.
// The \n on each line is preserved.
func splitLines(s []byte) [][]byte { return bytes.SplitAfter(s, newline, -1) }
func splitLines(s []byte) [][]byte { return bytes.SplitAfter(s, newline) }

2
src/pkg/path/filepath/path.go
View File

@ -136,7 +136,7 @@ func SplitList(path string) []string {
if path == "" {
return []string{}
}
return strings.Split(path, string(ListSeparator), -1)
return strings.Split(path, string(ListSeparator))
}
// Split splits path immediately following the final Separator,

2
src/pkg/rpc/server.go
View File

@ -495,7 +495,7 @@ func (server *Server) readRequest(codec ServerCodec) (req *Request, service *ser
return
}
serviceMethod := strings.Split(req.ServiceMethod, ".", -1)
serviceMethod := strings.Split(req.ServiceMethod, ".")
if len(serviceMethod) != 2 {
err = os.NewError("rpc: service/method request ill-formed: " + req.ServiceMethod)
return

2
src/pkg/runtime/debug/stack.go
View File

@ -52,7 +52,7 @@ func stack() []byte {
if err != nil {
continue
}
lines = bytes.Split(data, []byte{'\n'}, -1)
lines = bytes.Split(data, []byte{'\n'})
lastFile = file
}
line-- // in stack trace, lines are 1-indexed but our array is 0-indexed

2
src/pkg/runtime/debug/stack_test.go
View File

@ -35,7 +35,7 @@ func (t T) method() []byte {
*/
func TestStack(t *testing.T) {
b := T(0).method()
lines := strings.Split(string(b), "\n", -1)
lines := strings.Split(string(b), "\n")
if len(lines) <= 6 {
t.Fatal("too few lines")
}

6
src/pkg/smtp/smtp.go
View File

@ -93,11 +93,11 @@ func (c *Client) ehlo() os.Error {
return err
}
ext := make(map[string]string)
extList := strings.Split(msg, "\n", -1)
extList := strings.Split(msg, "\n")
if len(extList) > 1 {
extList = extList[1:]
for _, line := range extList {
args := strings.Split(line, " ", 2)
args := strings.SplitN(line, " ", 2)
if len(args) > 1 {
ext[args[0]] = args[1]
} else {
@ -106,7 +106,7 @@ func (c *Client) ehlo() os.Error {
}
}
if mechs, ok := ext["AUTH"]; ok {
c.auth = strings.Split(mechs, " ", -1)
c.auth = strings.Split(mechs, " ")
}
c.ext = ext
return err

4
src/pkg/smtp/smtp_test.go
View File

@ -64,8 +64,8 @@ func (f faker) Close() os.Error {
}
func TestBasic(t *testing.T) {
basicServer = strings.Join(strings.Split(basicServer, "\n", -1), "\r\n")
basicClient = strings.Join(strings.Split(basicClient, "\n", -1), "\r\n")
basicServer = strings.Join(strings.Split(basicServer, "\n"), "\r\n")
basicClient = strings.Join(strings.Split(basicClient, "\n"), "\r\n")
var cmdbuf bytes.Buffer
bcmdbuf := bufio.NewWriter(&cmdbuf)

6
src/pkg/strconv/fp_test.go
View File

@ -28,7 +28,7 @@ func pow2(i int) float64 {
// Wrapper around strconv.Atof64. Handles dddddp+ddd (binary exponent)
// itself, passes the rest on to strconv.Atof64.
func myatof64(s string) (f float64, ok bool) {
a := strings.Split(s, "p", 2)
a := strings.SplitN(s, "p", 2)
if len(a) == 2 {
n, err := strconv.Atoi64(a[0])
if err != nil {
@ -72,7 +72,7 @@ func myatof64(s string) (f float64, ok bool) {
// Wrapper around strconv.Atof32. Handles dddddp+ddd (binary exponent)
// itself, passes the rest on to strconv.Atof32.
func myatof32(s string) (f float32, ok bool) {
a := strings.Split(s, "p", 2)
a := strings.SplitN(s, "p", 2)
if len(a) == 2 {
n, err := strconv.Atoi(a[0])
if err != nil {
@ -116,7 +116,7 @@ func TestFp(t *testing.T) {
if len(line) == 0 || line[0] == '#' {
continue
}
a := strings.Split(line, " ", -1)
a := strings.Split(line, " ")
if len(a) != 4 {
t.Error("testfp.txt:", lineno, ": wrong field count")
continue

42
src/pkg/strings/strings.go
View File

@ -198,24 +198,38 @@ func genSplit(s, sep string, sepSave, n int) []string {
return a[0 : na+1]
}
// Split slices s into substrings separated by sep and returns a slice of
// SplitN slices s into substrings separated by sep and returns a slice of
// the substrings between those separators.
// If sep is empty, SplitN splits after each UTF-8 sequence.
// The count determines the number of substrings to return:
// n > 0: at most n substrings; the last substring will be the unsplit remainder.
// n == 0: the result is nil (zero substrings)
// n < 0: all substrings
func SplitN(s, sep string, n int) []string { return genSplit(s, sep, 0, n) }
// SplitAfterN slices s into substrings after each instance of sep and
// returns a slice of those substrings.
// If sep is empty, SplitAfterN splits after each UTF-8 sequence.
// The count determines the number of substrings to return:
// n > 0: at most n substrings; the last substring will be the unsplit remainder.
// n == 0: the result is nil (zero substrings)
// n < 0: all substrings
func SplitAfterN(s, sep string, n int) []string {
return genSplit(s, sep, len(sep), n)
}
// Split slices s into all substrings separated by sep and returns a slice of
// the substrings between those separators.
// If sep is empty, Split splits after each UTF-8 sequence.
// The count determines the number of substrings to return:
// n > 0: at most n substrings; the last substring will be the unsplit remainder.
// n == 0: the result is nil (zero substrings)
// n < 0: all substrings
func Split(s, sep string, n int) []string { return genSplit(s, sep, 0, n) }
// It is equivalent to SplitN with a count of -1.
func Split(s, sep string) []string { return genSplit(s, sep, 0, -1) }
// SplitAfter slices s into substrings after each instance of sep and
// SplitAfter slices s into all substrings after each instance of sep and
// returns a slice of those substrings.
// If sep is empty, Split splits after each UTF-8 sequence.
// The count determines the number of substrings to return:
// n > 0: at most n substrings; the last substring will be the unsplit remainder.
// n == 0: the result is nil (zero substrings)
// n < 0: all substrings
func SplitAfter(s, sep string, n int) []string {
return genSplit(s, sep, len(sep), n)
// If sep is empty, SplitAfter splits after each UTF-8 sequence.
// It is equivalent to SplitAfterN with a count of -1.
func SplitAfter(s, sep string) []string {
return genSplit(s, sep, len(sep), -1)
}
// Fields splits the string s around each instance of one or more consecutive white space

22
src/pkg/strings/strings_test.go
View File

@ -186,7 +186,7 @@ var explodetests = []ExplodeTest{
func TestExplode(t *testing.T) {
for _, tt := range explodetests {
a := Split(tt.s, "", tt.n)
a := SplitN(tt.s, "", tt.n)
if !eq(a, tt.a) {
t.Errorf("explode(%q, %d) = %v; want %v", tt.s, tt.n, a, tt.a)
continue
@ -223,7 +223,7 @@ var splittests = []SplitTest{
func TestSplit(t *testing.T) {
for _, tt := range splittests {
a := Split(tt.s, tt.sep, tt.n)
a := SplitN(tt.s, tt.sep, tt.n)
if !eq(a, tt.a) {
t.Errorf("Split(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, a, tt.a)
continue
@ -235,6 +235,12 @@ func TestSplit(t *testing.T) {
if s != tt.s {
t.Errorf("Join(Split(%q, %q, %d), %q) = %q", tt.s, tt.sep, tt.n, tt.sep, s)
}
if tt.n < 0 {
b := Split(tt.s, tt.sep)
if !reflect.DeepEqual(a, b) {
t.Errorf("Split disagrees with SplitN(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, b, a)
}
}
}
}
@ -256,7 +262,7 @@ var splitaftertests = []SplitTest{
func TestSplitAfter(t *testing.T) {
for _, tt := range splitaftertests {
a := SplitAfter(tt.s, tt.sep, tt.n)
a := SplitAfterN(tt.s, tt.sep, tt.n)
if !eq(a, tt.a) {
t.Errorf(`Split(%q, %q, %d) = %v; want %v`, tt.s, tt.sep, tt.n, a, tt.a)
continue
@ -265,6 +271,12 @@ func TestSplitAfter(t *testing.T) {
if s != tt.s {
t.Errorf(`Join(Split(%q, %q, %d), %q) = %q`, tt.s, tt.sep, tt.n, tt.sep, s)
}
if tt.n < 0 {
b := SplitAfter(tt.s, tt.sep)
if !reflect.DeepEqual(a, b) {
t.Errorf("SplitAfter disagrees with SplitAfterN(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, b, a)
}
}
}
}
@ -623,8 +635,8 @@ func equal(m string, s1, s2 string, t *testing.T) bool {
if s1 == s2 {
return true
}
e1 := Split(s1, "", -1)
e2 := Split(s2, "", -1)
e1 := Split(s1, "")
e2 := Split(s2, "")
for i, c1 := range e1 {
if i > len(e2) {
break

2
src/pkg/template/execute.go
View File

@ -114,7 +114,7 @@ func (t *Template) findVar(st *state, s string) reflect.Value {
if s == "@" {
return indirectPtr(data, numStars)
}
for _, elem := range strings.Split(s, ".", -1) {
for _, elem := range strings.Split(s, ".") {
// Look up field; data must be a struct or map.
data = t.lookup(st, data, elem)
if !data.IsValid() {

2
src/pkg/template/parse.go
View File

@ -483,7 +483,7 @@ func extractFormatters(words []string) (formatters []string) {
}
}
words[len(words)-1] = lastWord[0:bar]
formatters = strings.Split(lastWord[bar+1:], "|", -1)
formatters = strings.Split(lastWord[bar+1:], "|")
return
}

2
src/pkg/testing/testing.go
View File

@ -287,7 +287,7 @@ func parseCpuList() {
if len(*cpuListStr) == 0 {
cpuList = append(cpuList, runtime.GOMAXPROCS(-1))
} else {
for _, val := range strings.Split(*cpuListStr, ",", -1) {
for _, val := range strings.Split(*cpuListStr, ",") {
cpu, err := strconv.Atoi(val)
if err != nil || cpu <= 0 {
println("invalid value for -test.cpu")

12
src/pkg/unicode/maketables.go
View File

@ -156,7 +156,7 @@ const (
)
func parseCategory(line string) (state State) {
field := strings.Split(line, ";", -1)
field := strings.Split(line, ";")
if len(field) != NumField {
logger.Fatalf("%5s: %d fields (expected %d)\n", line, len(field), NumField)
}
@ -253,7 +253,7 @@ func all(scripts map[string][]Script) []string {
// Extract the version number from the URL
func version() string {
// Break on slashes and look for the first numeric field
fields := strings.Split(*url, "/", -1)
fields := strings.Split(*url, "/")
for _, f := range fields {
if len(f) > 0 && '0' <= f[0] && f[0] <= '9' {
return f
@ -336,7 +336,7 @@ func loadCasefold() {
if line[0] == '#' {
continue
}
field := strings.Split(line, "; ", -1)
field := strings.Split(line, "; ")
if len(field) != 4 {
logger.Fatalf("CaseFolding.txt %.5s...: %d fields (expected %d)\n", line, len(field), 4)
}
@ -372,7 +372,7 @@ func printCategories() {
return
}
// Find out which categories to dump
list := strings.Split(*tablelist, ",", -1)
list := strings.Split(*tablelist, ",")
if *tablelist == "all" {
list = allCategories()
}
@ -588,7 +588,7 @@ func parseScript(line string, scripts map[string][]Script) {
if len(line) == 0 {
return
}
field := strings.Split(line, ";", -1)
field := strings.Split(line, ";")
if len(field) != 2 {
logger.Fatalf("%s: %d fields (expected 2)\n", line, len(field))
}
@ -685,7 +685,7 @@ func printScriptOrProperty(doProps bool) {
resp.Body.Close()
// Find out which scripts to dump
list := strings.Split(flaglist, ",", -1)
list := strings.Split(flaglist, ",")
if flaglist == "all" {
list = all(table)
}