feat: add bitmasking example

Author: guidoschmidt

src/examples/networking/http-client.zig

@@ -4,24 +4,26 @@ pub fn main() !void {
     var gpa = std.heap.GeneralPurposeAllocator(.{}){};
     const allocator = gpa.allocator();
 
-    var client: std.http.Client = .{ .allocator = allocator };
-    defer client.deinit();
+    var client = std.http.Client{
+        .allocator = allocator,
+    };
 
-    var body = std.array_list.Managed(u8).init(allocator);
+    var body: std.Io.Writer.Allocating = .init(allocator);
     defer body.deinit();
+    try body.ensureUnusedCapacity(1024);
 
-    var writer_buffer: [1024]u8 = undefined;
-    var writer = std.fs.File.stdout().writer(&writer_buffer);
-
-    const req = try client.fetch(.{
-        .location = .{ .url = "https://ziglang.org" },
-        .extra_headers = &.{},
-        .response_writer = &writer.interface,
+    _ = try client.fetch(.{
+        .location = .{ .url = "https://adventofcode.com/2023/day/6/input" },
+        .extra_headers = &.{
+            .{
+                .name = "cookie",
+                .value = "***REMOVED***",
+            },
+        },
+        .method = .GET,
+        .response_writer = &body.writer,
     });
 
-    if (req.status == .ok) {
-        std.debug.print("\n200 -- Response {s}", .{body.items});
-    } else {
-        std.debug.print("\nSTATUS {d}", .{req.status});
-    }
+    const response = try body.toOwnedSlice();
+    std.debug.print("\nResult:\n{s}\n", .{response});
 }

src/examples/networking/http-to-file.zig

@@ -0,0 +1,27 @@
+const std = @import("std");
+
+pub fn main() !void {
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    const allocator = gpa.allocator();
+
+    var client = std.http.Client{
+        .allocator = allocator,
+    };
+
+    var body_file = try std.fs.cwd().createFile("aoc", .{});
+    defer body_file.close();
+    var buffer: [1]u8 = undefined;
+    var body_writer = body_file.writerStreaming(&buffer);
+
+    _ = try client.fetch(.{
+        .location = .{ .url = "https://adventofcode.com/2023/day/6/input" },
+        .extra_headers = &.{
+            .{
+                .name = "cookie",
+                .value = "***REMOVED***",
+            },
+        },
+        .method = .GET,
+        .response_writer = &body_writer.interface,
+    });
+}

src/examples/number/bitmasking.zig

@@ -0,0 +1,18 @@
+const std = @import("std");
+
+pub fn main() !void {
+    const input: u16 = 0b100001001001;
+    const one: u16 = 1;
+
+    for (0..12) |p| {
+        const port: u4 = @intCast(p);
+        const matches: bool = (input & (one << port)) >= 1;
+        const str = if (matches) "●" else "○";
+        std.debug.print("\nPort {d: >2} [{d: >8}]:    {s: >2}    {any: >4}", .{
+            port,
+            (input << port),
+            str,
+            matches,
+        });
+    }
+}