From 9d041894e485f3dcd93a952266273a25f6614f07 Mon Sep 17 00:00:00 2001 From: Nguyễn Gia Phong Date: Fri, 10 Dec 2021 21:09:19 +0700 Subject: [aoc/2021/10] Get rid of bullshit --- aoc/2021/10/Stack.zig | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 aoc/2021/10/Stack.zig (limited to 'aoc/2021/10/Stack.zig') diff --git a/aoc/2021/10/Stack.zig b/aoc/2021/10/Stack.zig new file mode 100644 index 0000000..1aab8eb --- /dev/null +++ b/aoc/2021/10/Stack.zig @@ -0,0 +1,35 @@ +const Allocator = @import("std").mem.Allocator; +const Self = @This(); + +allocator: *Allocator, +memory: []u8, +len: usize, + +pub fn alloc(allocator: *Allocator, size: usize) !Self { + return Self{ + .allocator = allocator, + .memory = try allocator.alloc(u8, size), + .len = 0, + }; +} + +pub fn free(self: *Self) void { + self.allocator.free(self.memory); + self.* = undefined; +} + +pub fn push(self: *Self, node: u8) void { + self.memory[self.len] = node; + self.len += 1; +} + +pub fn pop(self: *Self) ?u8 { + if (self.len < 1) + return null; + self.len -= 1; + return self.memory[self.len]; +} + +pub fn reset(self: *Self) void { + self.len = 0; +} -- cgit 1.4.1