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134 lines
3.7 KiB
134 lines
3.7 KiB
// File: PrintUtil.zig
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// Created Time: 2023-01-07
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// Author: sjinzh (sjinzh@gmail.com)
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const std = @import("std");
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pub const ListUtil = @import("ListNode.zig");
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pub const ListNode = ListUtil.ListNode;
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pub const TreeUtil = @import("TreeNode.zig");
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pub const TreeNode = TreeUtil.TreeNode;
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// Print an array
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pub fn printArray(comptime T: type, nums: []T) void {
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std.debug.print("[", .{});
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if (nums.len > 0) {
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for (nums) |num, j| {
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std.debug.print("{}{s}", .{num, if (j == nums.len-1) "]" else ", " });
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}
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} else {
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std.debug.print("]", .{});
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}
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}
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// Print a list
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pub fn printList(comptime T: type, list: std.ArrayList(T)) void {
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std.debug.print("[", .{});
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if (list.items.len > 0) {
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for (list.items) |value, i| {
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std.debug.print("{}{s}", .{value, if (i == list.items.len-1) "]" else ", " });
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}
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} else {
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std.debug.print("]", .{});
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}
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}
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// Print a linked list
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pub fn printLinkedList(comptime T: type, node: ?*ListNode(T)) !void {
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if (node == null) return;
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var list = std.ArrayList(i32).init(std.heap.page_allocator);
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defer list.deinit();
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var head = node;
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while (head != null) {
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try list.append(head.?.val);
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head = head.?.next;
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}
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for (list.items) |value, i| {
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std.debug.print("{}{s}", .{value, if (i == list.items.len-1) "\n" else "->" });
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}
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}
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// Print a queue or deque
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pub fn printQueue(comptime T: type, queue: std.TailQueue(T)) void {
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var node = queue.first;
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std.debug.print("[", .{});
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var i: i32 = 0;
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while (node != null) : (i += 1) {
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var data = node.?.data;
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std.debug.print("{}{s}", .{data, if (i == queue.len - 1) "]" else ", " });
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node = node.?.next;
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}
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}
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// Print a hash map
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pub fn printHashMap(comptime TKey: type, comptime TValue: type, map: std.AutoHashMap(TKey, TValue)) void {
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var it = map.iterator();
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while (it.next()) |kv| {
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var key = kv.key_ptr.*;
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var value = kv.value_ptr.*;
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std.debug.print("{} -> {s}\n", .{key, value});
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}
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}
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// print a heap (PriorityQueue)
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pub fn printHeap(comptime T: type, mem_allocator: std.mem.Allocator, queue: anytype) !void {
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var arr = queue.items;
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var len = queue.len;
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std.debug.print("堆的数组表示：", .{});
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printArray(T, arr[0..len]);
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std.debug.print("\n堆的树状表示：\n", .{});
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var root = try TreeUtil.arrToTree(T, mem_allocator, arr[0..len]);
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try printTree(root, null, false);
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}
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// This tree printer is borrowed from TECHIE DELIGHT
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// https://www.techiedelight.com/c-program-print-binary-tree/
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const Trunk = struct {
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prev: ?*Trunk = null,
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str: []const u8 = undefined,
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pub fn init(self: *Trunk, prev: ?*Trunk, str: []const u8) void {
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self.prev = prev;
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self.str = str;
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}
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};
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// Helper function to print branches of the binary tree
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pub fn showTrunks(p: ?*Trunk) void {
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if (p == null) return;
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showTrunks(p.?.prev);
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std.debug.print("{s}", .{p.?.str});
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}
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// The interface of the tree printer
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// Print a binary tree
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pub fn printTree(root: ?*TreeNode(i32), prev: ?*Trunk, isLeft: bool) !void {
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if (root == null) {
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return;
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}
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var prev_str = " ";
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var trunk = Trunk{.prev = prev, .str = prev_str};
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try printTree(root.?.right, &trunk, true);
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if (prev == null) {
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trunk.str = "———";
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} else if (isLeft) {
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trunk.str = "/———";
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prev_str = " |";
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} else {
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trunk.str = "\\———";
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prev.?.str = prev_str;
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}
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showTrunks(&trunk);
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std.debug.print(" {}\n", .{root.?.val});
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if (prev) |_| {
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prev.?.str = prev_str;
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}
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trunk.str = " |";
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try printTree(root.?.left, &trunk, false);
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} |