emitLiteral

private fnvoid emitLiteral(ref ubyte * op, const(ubyte) * src, size_t len) pure nothrow @nogc

Emit a literal element using raw pointers.

Writes the literal header and copies literal data to output.

`op`	Output pointer (updated in place).
`src`	Source pointer to literal data.
`len`	Length of literal data.