mirror of https://github.com/chzyer/readline.git
34 lines
512 B
Go
34 lines
512 B
Go
// +build darwin dragonfly freebsd linux,!appengine netbsd openbsd
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package readline
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import (
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"syscall"
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"unsafe"
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)
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var (
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StdinFd = syscall.Stdin
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)
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type winsize struct {
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Row uint16
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Col uint16
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Xpixel uint16
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Ypixel uint16
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}
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// get width of the terminal
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func getWidth() int {
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ws := &winsize{}
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retCode, _, errno := syscall.Syscall(syscall.SYS_IOCTL,
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uintptr(StdinFd),
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uintptr(syscall.TIOCGWINSZ),
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uintptr(unsafe.Pointer(ws)))
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if int(retCode) == -1 {
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panic(errno)
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}
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return int(ws.Col)
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}
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