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Check for zero-sentinel on Windows #44

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Check for zero-sentinel on Windows #44

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19 changes: 15 additions & 4 deletions src/serial.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -92,10 +92,17 @@ const WindowsPortIterator = struct {
self.data_size = 256;

return switch (RegEnumValueA(self.key, self.index, &self.name, &self.name_size, null, null, &self.data, &self.data_size)) {
0 => SerialPortDescription{
.file_name = try std.fmt.bufPrint(&self.filepath_data, "\\\\.\\{s}", .{self.data[0 .. self.data_size - 1]}),
.display_name = self.data[0 .. self.data_size - 1],
.driver = self.name[0..self.name_size],
0 => ser_desc: {
// if zero-sentinel, drop it.
if (self.data[self.data_size - 1] == 0) {
self.data_size -= 1;
}

break :ser_desc SerialPortDescription{
.file_name = try std.fmt.bufPrint(&self.filepath_data, "\\\\.\\{s}", .{self.data[0..self.data_size]}),
.display_name = self.data[0..self.data_size],
.driver = self.name[0..self.name_size],
};
},
259 => null,
else => error.WindowsError,
Expand Down Expand Up @@ -246,6 +253,10 @@ const WindowsInformationIterator = struct {

// if this is valid, return now
if (result == 0 and port_length > 0) {
// if zero-sentinel, drop it.
if (port_name[port_length - 1] == 0) {
port_length -= 1;
}
return port_length;
}
}
Expand Down