software: Implement serial port detection

1 files changed, 33 insertions, 0 deletions

diff --git a/software/vendor/github.com/creack/goselect/fdset.go b/software/vendor/github.com/creack/goselect/fdset.go
new file mode 100644
index 0000000..2ff3f6c
--- /dev/null
+++ b/software/vendor/github.com/creack/goselect/fdset.go
@@ -0,0 +1,33 @@
+// +build !freebsd,!windows,!plan9
+
+package goselect
+
+import "syscall"
+
+const FD_SETSIZE = syscall.FD_SETSIZE
+
+// FDSet wraps syscall.FdSet with convenience methods
+type FDSet syscall.FdSet
+
+// Set adds the fd to the set
+func (fds *FDSet) Set(fd uintptr) {
+	fds.Bits[fd/NFDBITS] |= (1 << (fd % NFDBITS))
+}
+
+// Clear remove the fd from the set
+func (fds *FDSet) Clear(fd uintptr) {
+	fds.Bits[fd/NFDBITS] &^= (1 << (fd % NFDBITS))
+}
+
+// IsSet check if the given fd is set
+func (fds *FDSet) IsSet(fd uintptr) bool {
+	return fds.Bits[fd/NFDBITS]&(1<<(fd%NFDBITS)) != 0
+}
+
+// Keep a null set to avoid reinstatiation
+var nullFdSet = &FDSet{}
+
+// Zero empties the Set
+func (fds *FDSet) Zero() {
+	copy(fds.Bits[:], (nullFdSet).Bits[:])
+}