On Sun, 15 Feb 2026 at 04:16, David Chiang <[email protected]> wrote:
> Greetings, it looks like node.protect_glyph changes a subtype of 256 to
> 512, and node.unprotect_glyph does not change a subtype of 256 to 0. Are
> the following changes correct:
>
> --- a/source/texk/web2c/luatexdir/lua/lnodelib.c
> +++ b/source/texk/web2c/luatexdir/lua/lnodelib.c
> @@ -6151,7 +6151,7 @@ static int lang_tex_direct_hyphenating(lua_State * L)
> #define protect_one_indeed(n) \
> if (n != null) { \
> int s = subtype(n); \
> - if (s <= 256) { \
> + if (s < 256) { \
> subtype(n) = (quarterword) (s == 1 ? 256 : 256 + s); \
> } \
> }
> @@ -6162,7 +6162,7 @@ static int lang_tex_direct_hyphenating(lua_State * L)
> while (h != null) { \
> if (type(h) == glyph_node) { \
> int s = subtype(h); \
> - if (s <= 256) { \
> + if (s < 256) { \
> subtype(h) = (quarterword) (s == 1 ? 256 : 256 + s); \
> } \
> } \
> @@ -6182,7 +6182,7 @@ static int lang_tex_direct_hyphenating(lua_State * L)
> #define unprotect_one_indeed(n) \
> if (n != null) { \
> int s = subtype(n); \
> - if (s > 256) { \
> + if (s >= 256) { \
> subtype(n) = (quarterword) (s - 256); \
> } \
> }
> @@ -6193,7 +6193,7 @@ static int lang_tex_direct_hyphenating(lua_State * L)
> while (h != null) { \
> if (type(h) == glyph_node) { \
> int s = subtype(h); \
> - if (s <= 256) { \
> + if (s >= 256) { \
> subtype(h) = (quarterword) (s - 256); \
> } \
> } \
>
>
>
checking.
--
luigi
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