1 files changed, 101 insertions, 0 deletions
diff --git a/system/libraries/format/table.zig b/system/libraries/format/table.zig
new file mode 100644
index 0000000..e26be32
--- /dev/null
+++ b/system/libraries/format/table.zig
@@ -0,0 +1,101 @@
+//! Table formatting
+
+const io = @import("io");
+const colors = @import("colors");
+
+pub const Alignment = enum {
+    left,
+    right,
+};
+
+pub const Column = struct {
+    name: []const u8,
+    color: u32 = colors.white,
+    alignment: Alignment = .left,
+};
+
+const MAX_COLUMNS = 8;
+const MAX_ROWS = 256;
+
+pub const Table = struct {
+    columns: []const Column,
+    col_widths: [MAX_COLUMNS]usize,
+    rows: [MAX_ROWS][MAX_COLUMNS][]const u8,
+    row_colors: [MAX_ROWS][MAX_COLUMNS]u32,
+    row_count: usize,
+
+    pub fn init(cols: []const Column) Table {
+        var t = Table{
+            .columns = cols,
+            .col_widths = [_]usize{0} ** MAX_COLUMNS,
+            .rows = undefined,
+            .row_colors = undefined,
+            .row_count = 0,
+        };
+
+        for (cols, 0..) |col, i| {
+            t.col_widths[i] = col.name.len;
+        }
+
+        return t;
+    }
+
+    pub fn row(self: *Table, cells: []const []const u8) void {
+        self.rowColored(cells, null);
+    }
+
+    pub fn rowColored(self: *Table, cells: []const []const u8, cell_colors: ?[]const u32) void {
+        if (self.row_count >= MAX_ROWS) return;
+
+        for (cells, 0..) |cell, i| {
+            if (i >= self.columns.len) break;
+            self.rows[self.row_count][i] = cell;
+
+            if (cell_colors) |cc| {
+                self.row_colors[self.row_count][i] = cc[i];
+            } else {
+                self.row_colors[self.row_count][i] = self.columns[i].color;
+            }
+
+            if (cell.len > self.col_widths[i]) {
+                self.col_widths[i] = cell.len;
+            }
+        }
+
+        self.row_count += 1;
+    }
+
+    pub fn print(self: *Table) void {
+        for (self.columns, 0..) |col, i| {
+            _ = io.mark(io.stream, col.name, colors.white) catch {};
+            self.printPadding(self.col_widths[i] - col.name.len + 2);
+        }
+        _ = io.mark(io.stream, "\n", colors.white) catch {};
+
+        for (0..self.row_count) |r| {
+            for (0..self.columns.len) |c| {
+                const cell = self.rows[r][c];
+                const col = self.columns[c];
+                const color = self.row_colors[r][c];
+
+                if (col.alignment == .right) {
+                    self.printPadding(self.col_widths[c] - cell.len);
+                    _ = io.mark(io.stream, cell, color) catch {};
+                    self.printPadding(2);
+                } else {
+                    _ = io.mark(io.stream, cell, color) catch {};
+                    self.printPadding(self.col_widths[c] - cell.len + 2);
+                }
+            }
+            _ = io.mark(io.stream, "\n", colors.white) catch {};
+        }
+    }
+
+    fn printPadding(self: *Table, count: usize) void {
+        _ = self;
+        var i: usize = 0;
+        while (i < count) : (i += 1) {
+            _ = io.mark(io.stream, " ", colors.white) catch {};
+        }
+    }
+};