Add bsd support

Author: nqv

serial_bsd.go

@@ -0,0 +1,93 @@
+// +build freebsd openbsd netbsd
+
+package serial
+
+import (
+	"fmt"
+	"syscall"
+	"unsafe"
+)
+
+var baudRates = map[int]uint32{
+	50:     syscall.B50,
+	75:     syscall.B75,
+	110:    syscall.B110,
+	134:    syscall.B134,
+	150:    syscall.B150,
+	200:    syscall.B200,
+	300:    syscall.B300,
+	600:    syscall.B600,
+	1200:   syscall.B1200,
+	1800:   syscall.B1800,
+	2400:   syscall.B2400,
+	4800:   syscall.B4800,
+	9600:   syscall.B9600,
+	19200:  syscall.B19200,
+	38400:  syscall.B38400,
+	57600:  syscall.B57600,
+	115200: syscall.B115200,
+	230400: syscall.B230400,
+	460800: syscall.B460800,
+}
+
+var charSizes = map[int]uint32{
+	5: syscall.CS5,
+	6: syscall.CS6,
+	7: syscall.CS7,
+	8: syscall.CS8,
+}
+
+// syscallSelect is a wapper for syscall.Select that only returns error.
+func syscallSelect(n int, r *syscall.FdSet, w *syscall.FdSet, e *syscall.FdSet, tv *syscall.Timeval) error {
+	return syscall.Select(n, r, w, e, tv)
+}
+
+// tcsetattr sets terminal file descriptor parameters.
+// See man tcsetattr(3).
+func tcsetattr(fd int, termios *syscall.Termios) (err error) {
+	r, _, errno := syscall.Syscall(uintptr(syscall.SYS_IOCTL),
+		uintptr(fd), uintptr(syscall.TIOCSETA), uintptr(unsafe.Pointer(termios)))
+	if errno != 0 {
+		err = errno
+		return
+	}
+	if r != 0 {
+		err = fmt.Errorf("tcsetattr failed %v", r)
+	}
+	return
+}
+
+// tcgetattr gets terminal file descriptor parameters.
+// See man tcgetattr(3).
+func tcgetattr(fd int, termios *syscall.Termios) (err error) {
+	r, _, errno := syscall.Syscall(uintptr(syscall.SYS_IOCTL),
+		uintptr(fd), uintptr(syscall.TIOCGETA), uintptr(unsafe.Pointer(termios)))
+	if errno != 0 {
+		err = errno
+		return
+	}
+	if r != 0 {
+		err = fmt.Errorf("tcgetattr failed %v", r)
+		return
+	}
+	return
+}
+
+// fdget returns index and offset of fd in fds.
+func fdget(fd int, fds *syscall.FdSet) (index, offset int) {
+	index = fd / (syscall.FD_SETSIZE / len(fds.X__fds_bits)) % len(fds.X__fds_bits)
+	offset = fd % (syscall.FD_SETSIZE / len(fds.X__fds_bits))
+	return
+}
+
+// fdset implements FD_SET macro.
+func fdset(fd int, fds *syscall.FdSet) {
+	idx, pos := fdget(fd, fds)
+	fds.X__fds_bits[idx] = 1 << uint(pos)
+}
+
+// fdisset implements FD_ISSET macro.
+func fdisset(fd int, fds *syscall.FdSet) bool {
+	idx, pos := fdget(fd, fds)
+	return fds.X__fds_bits[idx]&(1<<uint(pos)) != 0
+}

serial_darwin.go

@@ -69,3 +69,22 @@ func tcgetattr(fd int, termios *syscall.Termios) (err error) {
 	}
 	return
 }
+
+// fdget returns index and offset of fd in fds.
+func fdget(fd int, fds *syscall.FdSet) (index, offset int) {
+	index = fd / (syscall.FD_SETSIZE / len(fds.Bits)) % len(fds.Bits)
+	offset = fd % (syscall.FD_SETSIZE / len(fds.Bits))
+	return
+}
+
+// fdset implements FD_SET macro.
+func fdset(fd int, fds *syscall.FdSet) {
+	idx, pos := fdget(fd, fds)
+	fds.Bits[idx] = 1 << uint(pos)
+}
+
+// fdisset implements FD_ISSET macro.
+func fdisset(fd int, fds *syscall.FdSet) bool {
+	idx, pos := fdget(fd, fds)
+	return fds.Bits[idx]&(1<<uint(pos)) != 0
+}

serial_linux.go

@@ -82,3 +82,22 @@ func tcgetattr(fd int, termios *syscall.Termios) (err error) {
 	}
 	return
 }
+
+// fdget returns index and offset of fd in fds.
+func fdget(fd int, fds *syscall.FdSet) (index, offset int) {
+	index = fd / (syscall.FD_SETSIZE / len(fds.Bits)) % len(fds.Bits)
+	offset = fd % (syscall.FD_SETSIZE / len(fds.Bits))
+	return
+}
+
+// fdset implements FD_SET macro.
+func fdset(fd int, fds *syscall.FdSet) {
+	idx, pos := fdget(fd, fds)
+	fds.Bits[idx] = 1 << uint(pos)
+}
+
+// fdisset implements FD_ISSET macro.
+func fdisset(fd int, fds *syscall.FdSet) bool {
+	idx, pos := fdget(fd, fds)
+	return fds.Bits[idx]&(1<<uint(pos)) != 0
+}

serial_posix.go

@@ -1,4 +1,4 @@
-// +build darwin linux
+// +build darwin linux freebsd openbsd netbsd
 
 package serial
 
@@ -64,7 +64,7 @@ func (p *port) Read(b []byte) (n int, err error) {
 	var rfds syscall.FdSet
 
 	fd := p.fd
-	fdSet(fd, &rfds)
+	fdset(fd, &rfds)
 
 	var tv *syscall.Timeval
 	if p.timeout > 0 {
@@ -81,7 +81,7 @@ func (p *port) Read(b []byte) (n int, err error) {
 			return
 		}
 	}
-	if !fdIsSet(fd, &rfds) {
+	if !fdisset(fd, &rfds) {
 		// Timeout
 		err = ErrTimeout
 		return
@@ -203,22 +203,3 @@ func newTermios(c *Config) (termios *syscall.Termios, err error) {
 	// Both are unused as NDELAY is we utilized when opening device.
 	return
 }
-
-// fdGet returns index and offset of fd in fds.
-func fdGet(fd int, fds *syscall.FdSet) (index, offset int) {
-	index = fd / (syscall.FD_SETSIZE / len(fds.Bits)) % len(fds.Bits)
-	offset = fd % (syscall.FD_SETSIZE / len(fds.Bits))
-	return
-}
-
-// fdSet implements FD_SET macro.
-func fdSet(fd int, fds *syscall.FdSet) {
-	idx, pos := fdGet(fd, fds)
-	fds.Bits[idx] = 1 << uint(pos)
-}
-
-// fdIsSet implements FD_ISSET macro.
-func fdIsSet(fd int, fds *syscall.FdSet) bool {
-	idx, pos := fdGet(fd, fds)
-	return fds.Bits[idx]&(1<<uint(pos)) != 0
-}