ref: 8164505a0df98c04b04ae40eb0780bbadf710e1d
dir: /os/boot/libflate/zlib.h/
/* * zlib header fields */ enum { ZlibMeth = 0x0f, /* mask of compression methods */ ZlibDeflate = 0x08, ZlibCInfo = 0xf0, /* mask of compression aux. info */ ZlibWin32k = 0x70, /* 32k history window */ };