1 files changed, 63 insertions, 0 deletions
diff --git a/src/cmd/lib/types.zig b/src/cmd/lib/types.zig
new file mode 100644
index 0000000..1f0e162
--- /dev/null
+++ b/src/cmd/lib/types.zig
@@ -0,0 +1,63 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const ArrayList = std.ArrayList;
+
+pub const CommandStatus = union(enum) {
+    Code: u16,
+    ExitShell,
+};
+
+pub const OutputCapture = struct {
+    buffer: ArrayList(u8),
+
+    pub fn init(allocator: Allocator) OutputCapture {
+        return OutputCapture{
+            .buffer = ArrayList(u8).init(allocator),
+        };
+    }
+
+    pub fn deinit(self: *OutputCapture) void {
+        self.buffer.deinit();
+    }
+
+    pub fn write(self: *OutputCapture, data: []const u8) !void {
+        try self.buffer.appendSlice(data);
+    }
+
+    pub fn getContents(self: *const OutputCapture) []const u8 {
+        return self.buffer.items;
+    }
+};
+
+pub const InputSource = struct {
+    data: []const u8,
+    position: usize,
+
+    pub fn init(data: []const u8) InputSource {
+        return InputSource{
+            .data = data,
+            .position = 0,
+        };
+    }
+
+    pub fn readLine(self: *InputSource, allocator: Allocator) !?[]const u8 {
+        if (self.position >= self.data.len) {
+            return null; // EOF
+        }
+
+        var line_end = self.position;
+        while (line_end < self.data.len and self.data[line_end] != '\n') {
+            line_end += 1;
+        }
+
+        const line = self.data[self.position..line_end];
+        self.position = if (line_end < self.data.len) line_end + 1 else self.data.len;
+
+        // Remove trailing \r if present (DOS line endings)
+        if (line.len > 0 and line[line.len - 1] == '\r') {
+            return try allocator.dupe(u8, line[0 .. line.len - 1]);
+        } else {
+            return try allocator.dupe(u8, line);
+        }
+    }
+};