const std = @import("std");

const Allocator = std.mem.Allocator;
const ArrayList = std.ArrayList;

pub fn escapeXml(writer: anytype, text: []const u8) !void {
    for (text) |ch| {
        try switch (ch) {
            '<' => writer.writeAll("&lt;"),
            '>' => writer.writeAll("&gt;"),
            '&' => writer.writeAll("&amp;"),
            '"' => writer.writeAll("&quot;"),
            else => writer.writeByte(ch),
        };
    }
}

pub inline fn isNull(value: anytype) bool {
    return switch (@typeInfo(@TypeOf(value))) {
        .Null => true,
        .Optional => value == null,
        else => false,
    };
}