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os: clarify windows read console code

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R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9458043
This commit is contained in:
Alex Brainman 2013-05-17 17:26:44 +10:00
parent c15ca825ad
commit fad27ec5d4
1 changed files with 4 additions and 4 deletions
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8
src/pkg/os/file_windows.go
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@ -253,12 +253,12 @@ func (f *File) readConsole(b []byte) (n int, err error) {
if len(f.readbuf) == 0 { if len(f.readbuf) == 0 {
// syscall.ReadConsole seems to fail, if given large buffer. // syscall.ReadConsole seems to fail, if given large buffer.
// So limit the buffer to 16000 characters. // So limit the buffer to 16000 characters.
readN := 16000 numBytes := len(b)
if len(b) < readN { if numBytes > 16000 {
readN = len(b) numBytes = 16000
} }
// get more input data from os // get more input data from os
wchars := make([]uint16, readN) wchars := make([]uint16, numBytes)
var p *uint16 var p *uint16
if len(b) > 0 { if len(b) > 0 {
p = &wchars[0] p = &wchars[0]