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This is an example of documentation generated by ZigDoc, an alternative to Zig's built-in Auto Doc feature. See also examples in other modes/formats. The project being documented here (as the example) is the Zig standard library. Private Function

decodeAny

Private Function
std.crypto.codecs.base64_hex_ct.hex.decodeAny
fn decodeAny(
        bin: []u8,
        encoded: []const u8,
        ignored_chars: ?StaticBitSet(256),
    ) error

Params

  • bin: []u8
  • encoded: []const u8
  • ignored_chars: ?StaticBitSet(256)

File

crypto/codecs/base64_hex_ct.zig:106
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    fn decodeAny(
        bin: []u8,
        encoded: []const u8,
        ignored_chars: ?StaticBitSet(256),
    ) error{ NoSpaceLeft, InvalidCharacter, InvalidPadding }![]const u8 {
        var bin_pos: usize = 0;
        var state: bool = false;
        var c_acc: u8 = 0;
        for (encoded) |c| {
            const c_num = c ^ 48;
            const c_num0: u8 = @truncate((@as(u16, c_num) -% 10) >> 8);
            const c_alpha: u8 = (c & ~@as(u8, 32)) -% 55;
            const c_alpha0: u8 = @truncate(((@as(u16, c_alpha) -% 10) ^ (@as(u16, c_alpha) -% 16)) >> 8);
            if ((c_num0 | c_alpha0) == 0) {
                if (ignored_chars) |set| {
                    if (set.isSet(c)) {
                        continue;
                    }
                }
                return error.InvalidCharacter;
            }
            const c_val = (c_num0 & c_num) | (c_alpha0 & c_alpha);
            if (bin_pos >= bin.len) {
                return error.NoSpaceLeft;
            }
            if (!state) {
                c_acc = c_val << 4;
            } else {
                bin[bin_pos] = c_acc | c_val;
                bin_pos += 1;
            }
            state = !state;
        }
        if (state) {
            return error.InvalidPadding;
        }
        return bin[0..bin_pos];
    }