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TSCBasic: implement support for width in the terminal #105

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Merged
merged 1 commit into from
Aug 10, 2020
Merged

TSCBasic: implement support for width in the terminal #105

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11 changes: 10 additions & 1 deletion Sources/TSCBasic/TerminalController.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -121,6 +121,14 @@ public final class TerminalController {
///
/// - Returns: Current width of terminal if it was determinable.
public static func terminalWidth() -> Int? {
#if os(Windows)
var csbi: CONSOLE_SCREEN_BUFFER_INFO = CONSOLE_SCREEN_BUFFER_INFO()
if !GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi) {
// GetLastError()
return nil
}
return Int(csbi.srWindow.Right - csbi.srWindow.Left) + 1
#else
// Try to get from environment.
if let columns = ProcessEnv.vars["COLUMNS"], let width = Int(columns) {
return width
Expand All @@ -130,13 +138,14 @@ public final class TerminalController {
// Following code does not compile on ppc64le well. TIOCGWINSZ is
// defined in system ioctl.h file which needs to be used. This is
// a temporary arrangement and needs to be fixed.
#if !(arch(powerpc64le) || os(Windows))
#if !arch(powerpc64le)
var ws = winsize()
if ioctl(1, UInt(TIOCGWINSZ), &ws) == 0 {
return Int(ws.ws_col)
}
#endif
return nil
#endif
}

/// Flushes the stream.
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