String length: Difference between revisions
Add Zig utf32le, utf32be will follow someday.
(add Crystal example) |
(Add Zig utf32le, utf32be will follow someday.) |
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Line 3,841:
<syntaxhighlight lang="zig">const std = @import("std");
fn printResults(alloc: std.mem.Allocator, string: []const u8) !void {
pub fn main() !void {▼
const string: []const u8 = "Hello, world!";▼
const cnt_codepts_utf8 = try std.unicode.utf8CountCodepoints(string);
// There is no sane and portable extended ascii, so the best
Line 3,848 ⟶ 3,847:
const cnt_bytes_utf8 = string.len;
const stdout_wr = std.io.getStdOut().writer();
try stdout_wr.print("utf8 codepoints = {d}, bytes = {d}\n", .{ cnt_codepts_utf8, cnt_bytes_utf8 });
const utf16str = try std.unicode.utf8ToUtf16LeWithNull(alloc, string);
const cnt_codepts_utf16 = try std.unicode.utf16CountCodepoints(utf16str);
const cnt_2bytes_utf16 = try std.unicode.calcUtf16LeLen(string);
try stdout_wr.print("utf16 codepoints = {d}, bytes = {d}\n", .{ cnt_codepts_utf16, 2 * cnt_2bytes_utf16 });
}
▲pub fn main() !void {
var arena_instance = std.heap.ArenaAllocator.init(std.heap.page_allocator);
defer arena_instance.deinit();
const arena = arena_instance.allocator();
try printResults(arena, string1);
const string2: []const u8 = "møøse";
try printResults(arena, string2);
const string3: []const u8 = "𝔘𝔫𝔦𝔠𝔬𝔡𝔢";
try printResults(arena, string3);
// \u{332} is underscore of previous character, which the browser may not
// copy correctly
const string4: []const u8 = "J\u{332}o\u{332}s\u{332}e\u{301}\u{332}";
try printResults(arena, string4);
// utf8 codepoints = 13, bytes = 13
// utf16 codepoints = 13, bytes = 26
// utf8 codepoints = 5, bytes = 7
// utf16 codepoints = 5, bytes = 10
// utf8 codepoints = 7, bytes = 28
// utf16 codepoints = 7, bytes = 28
// utf8 codepoints = 9, bytes = 14
// utf16 codepoints = 9, bytes = 18
}</syntaxhighlight>
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