1 files changed, 45 insertions, 0 deletions

diff --git a/src/StringBuilder.zig b/src/StringBuilder.zig
new file mode 100644
index 0000000..632b1b3
--- /dev/null
+++ b/src/StringBuilder.zig
@@ -0,0 +1,45 @@
+const std = @import("std");
+
+const Allocator = std.mem.Allocator;
+const ArrayList = std.ArrayList;
+const StringBuilder = @This();
+
+pub const Error = std.mem.Allocator.Error;
+pub const Writer = std.io.Writer(*StringBuilder, Error, writeFn);
+
+data: ArrayList(u8),
+
+pub fn init(allocator: std.mem.Allocator) StringBuilder {
+    return .{
+        .data = ArrayList(u8).init(allocator),
+    };
+}
+
+pub fn deinit(self: StringBuilder) void {
+    self.data.deinit();
+}
+
+pub fn append(self: *StringBuilder, char: u8) Error!void {
+    return self.data.append(char);
+}
+
+pub fn appendMany(self: *StringBuilder, chars: []const u8) Error!void {
+    return self.data.appendSlice(chars);
+}
+
+pub fn seeSlice(self: *StringBuilder) []const u8 {
+    return self.data.items;
+}
+
+pub fn toOwnedSlice(self: StringBuilder) []u8 {
+    return self.data.toOwnedSlice();
+}
+
+pub fn writer(self: *StringBuilder) Writer {
+    return Writer { .context = self };
+}
+
+fn writeFn(self: *StringBuilder, chars: []const u8) Error!usize {
+    try self.appendMany(chars);
+    return chars.len;
+}