first console driver abstraction

1 files changed, 34 insertions, 0 deletions

diff --git a/src/console.zig b/src/console.zig
new file mode 100644
index 0000000..1a7539e
--- /dev/null
+++ b/src/console.zig
@@ -0,0 +1,34 @@
+const std = @import("std");
+const Writer = std.Io.Writer;
+
+pub const Console = struct {
+    setup: *const fn (*const @This()) void,
+    write: *const fn (*const @This(), []const u8) void,
+};
+
+var cur: ?*const Console = null;
+
+fn drain(
+    _: *Writer,
+    data: []const []const u8,
+    _: usize,
+) Writer.Error!usize {
+    if (cur) |c| {
+        c.write(c, data[0]);
+    }
+    return data[0].len;
+}
+
+var writer: Writer = .{
+    .vtable = &.{ .drain = drain },
+    .buffer = &.{},
+};
+
+pub fn print(comptime fmt: []const u8, args: anytype) void {
+    writer.print(fmt, args) catch {};
+}
+
+pub fn set_console(console: *const Console) void {
+    console.setup(console);
+    cur = console;
+}