Function nextCodepoint [src]
If the next codepoint is encoded by a surrogate pair, returns the
codepoint that the surrogate pair represents.
If the next codepoint is an unpaired surrogate, returns the codepoint
of the unpaired surrogate.
Prototype
pub fn nextCodepoint(it: *Wtf16LeIterator) ?u21 Parameters
it: *Wtf16LeIterator Source
pub fn nextCodepoint(it: *Wtf16LeIterator) ?u21 {
assert(it.i <= it.bytes.len);
if (it.i == it.bytes.len) return null;
var code_units: [2]u16 = undefined;
code_units[0] = mem.readInt(u16, it.bytes[it.i..][0..2], .little);
it.i += 2;
surrogate_pair: {
if (utf16IsHighSurrogate(code_units[0])) {
if (it.i >= it.bytes.len) break :surrogate_pair;
code_units[1] = mem.readInt(u16, it.bytes[it.i..][0..2], .little);
const codepoint = utf16DecodeSurrogatePair(&code_units) catch break :surrogate_pair;
it.i += 2;
return codepoint;
}
}
return code_units[0];
}