Vigenère cipher: Difference between revisions
Add Zig solution
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Recombinant (talk | contribs) (Add Zig solution) |
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outfile = PACKMYBOXWITHFIVEDOZENLIQUORJUGS
</pre>
=={{header|Zig}}==
{{works with|Zig|0.11.0dev}}
<syntaxhighlight lang="zig">const std = @import("std");
const Allocator = std.mem.Allocator;
</syntaxhighlight>
<syntaxhighlight lang="zig">/// Caller owns the returned slice memory.
fn vigenere(allocator: Allocator, text: []const u8, key: []const u8, encrypt: bool) Allocator.Error![]u8 {
var dynamic_string = std.ArrayList(u8).init(allocator);
var key_index: usize = 0;
for (text) |letter| {
const c = if (std.ascii.isLower(letter)) std.ascii.toUpper(letter) else letter;
if (std.ascii.isUpper(c)) {
const k = key[key_index];
const n = if (encrypt) ((c - 'A') + (k - 'A')) else 26 + c - k;
try dynamic_string.append(n % 26 + 'A'); // A-Z
key_index += 1;
key_index %= key.len;
}
}
return dynamic_string.toOwnedSlice();
}</syntaxhighlight>
<syntaxhighlight lang="zig">pub fn main() anyerror!void {
// allocator
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer {
const ok = gpa.deinit();
std.debug.assert(ok == .ok);
}
const allocator = gpa.allocator();
//
const stdout = std.io.getStdOut().writer();
//
const key = "VIGENERECIPHER";
const text = "Beware the Jabberwock, my son! The jaws that bite, the claws that catch!";
const encoded = try vigenere(allocator, text, key, true);
defer allocator.free(encoded);
_ = try stdout.print("{s}\n", .{encoded});
const decoded = try vigenere(allocator, encoded, key, false);
defer allocator.free(decoded);
_ = try stdout.print("{s}\n", .{decoded});
}</syntaxhighlight>
{{out}}
<pre>WMCEEIKLGRPIFVMEUGXQPWQVIOIAVEYXUEKFKBTALVXTGAFXYEVKPAGY
BEWARETHEJABBERWOCKMYSONTHEJAWSTHATBITETHECLAWSTHATCATCH</pre>
=={{header|zkl}}==
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