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|
// +build js
package syscall
import (
"unsafe"
"github.com/gopherjs/gopherjs/js"
)
var warningPrinted = false
var lineBuffer []byte
func init() {
js.Global.Set("$flushConsole", js.InternalObject(func() {
if len(lineBuffer) != 0 {
js.Global.Get("console").Call("log", string(lineBuffer))
lineBuffer = nil
}
}))
}
func printWarning() {
if !warningPrinted {
js.Global.Get("console").Call("error", "warning: system calls not available, see https://github.com/gopherjs/gopherjs/blob/master/doc/syscalls.md")
}
warningPrinted = true
}
func printToConsole(b []byte) {
goPrintToConsole := js.Global.Get("goPrintToConsole")
if goPrintToConsole != js.Undefined {
goPrintToConsole.Invoke(js.InternalObject(b))
return
}
lineBuffer = append(lineBuffer, b...)
for {
i := indexByte(lineBuffer, '\n')
if i == -1 {
break
}
js.Global.Get("console").Call("log", string(lineBuffer[:i])) // don't use println, since it does not externalize multibyte characters
lineBuffer = lineBuffer[i+1:]
}
}
func use(p unsafe.Pointer) {
// no-op
}
func Exit(code int) {
Syscall(exitTrap, uintptr(code), 0, 0)
}
// indexByte is copied from bytes package to avoid importing it (since the real syscall package doesn't).
func indexByte(s []byte, c byte) int {
for i, b := range s {
if b == c {
return i
}
}
return -1
}
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