From 83e369672002d553c9ec5196369c734ef60d4292 Mon Sep 17 00:00:00 2001 From: Philipp Gesang Date: Mon, 4 Aug 2014 22:33:43 +0200 Subject: [PATCH] luainit.w: cast checksum field to unsigned when reading font from Lua Addresses http://tracker.luatex.org/view.php?id=913 If the ``_font_checksum`` field is pulled from the font table using ``lua_numeric_field_by_index()`` it must be cast to unsigned first. Since ``lua_roundnumber()`` casts directly to integer, relevant information is lost. The patch fixes this by adding an ad-hoc exemption for the checksum field but it might make sense to add a dedicated function for pulling unsigned values instead. --- source/texk/web2c/luatexdir/lua/luainit.w | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/source/texk/web2c/luatexdir/lua/luainit.w b/source/texk/web2c/luatexdir/lua/luainit.w index 98660ca..f732987 100644 --- a/source/texk/web2c/luatexdir/lua/luainit.w +++ b/source/texk/web2c/luatexdir/lua/luainit.w @@ -272,7 +272,10 @@ int lua_numeric_field_by_index(lua_State * L, int name_index, int dflt) lua_rawgeti(L, LUA_REGISTRYINDEX, name_index); /* fetch the stringptr */ lua_rawget(L, -2); if (lua_type(L, -1) == LUA_TNUMBER) { - i = lua_roundnumber(L, -1); + if (name_index == lua_key_index(checksum)) + i = (unsigned)lua_tonumber(L, -1); + else + i = lua_roundnumber(L, -1); } lua_pop(L, 1); return i; -- 2.0.1