77 lines
2.2 KiB
Zig
77 lines
2.2 KiB
Zig
const std = @import("std");
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const ascii = std.ascii;
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const ErrCtx = @import("ErrCtx.zig");
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pub fn downCast(comptime T: type, n: u64) error{InvalidRecord}!T {
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return std.math.cast(T, n) orelse return error.InvalidRecord;
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}
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pub fn utf8(s: []const u8) error{InvalidRecord}!void {
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if (!std.unicode.utf8ValidateSlice(s)) {
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return error.InvalidRecord;
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}
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}
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// # adduser žmogus
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// adduser: To avoid problems, the username should consist only of letters,
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// digits, underscores, periods, at signs and dashes, and not start with a dash
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// (as defined by IEEE Std 1003.1-2001). For compatibility with Samba machine
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// accounts $ is also supported at the end of the username
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pub fn name(s: []const u8, err: *ErrCtx) error{InvalidRecord}!void {
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if (s.len == 0)
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return err.returnf("cannot be empty", .{}, error.InvalidRecord);
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const c0 = s[0];
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if (!(ascii.isAlNum(c0) or c0 == '_' or c0 == '.' or c0 == '@'))
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return err.returnf("invalid character at position 0", .{}, error.InvalidRecord);
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for (s[1..]) |c, i| {
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if (!(ascii.isAlNum(c) or c == '_' or c == '.' or c == '@' or c == '-'))
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return err.returnf(
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"invalid character at position {d}",
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.{i + 2},
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error.InvalidRecord,
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);
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}
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}
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const testing = std.testing;
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test "validate name" {
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const examples = [_]struct {
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name: []const u8,
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wantErr: ?[]const u8 = null,
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}{
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.{
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.name = "all-good",
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},
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.{
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.name = "...",
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},
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.{
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.name = "",
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.wantErr = "cannot be empty",
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},
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.{
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.name = "-no-start-dash",
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.wantErr = "invalid character at position 0",
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},
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.{
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.name = "Herbasž",
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.wantErr = "invalid character at position 7",
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},
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};
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for (examples) |tt| {
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var err = ErrCtx{};
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if (tt.wantErr) |wantErr| {
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try testing.expectError(error.InvalidRecord, name(tt.name, &err));
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try testing.expectEqualStrings(wantErr, err.unwrap().constSlice());
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} else {
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try name(tt.name, &err);
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try testing.expectEqualStrings("", err.unwrap().constSlice());
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}
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}
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}
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