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author | Hans Hagen <pragma@wxs.nl> | 2022-09-16 15:53:42 +0200 |
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committer | Context Git Mirror Bot <phg@phi-gamma.net> | 2022-09-16 15:53:42 +0200 |
commit | c161b7d6fe142231346cc1844e6e27c0ab7718c1 (patch) | |
tree | 3fd877b8986137703e987e4651a2db8e946a0f72 /source/luametatex/source/luacore/luasocket/src/compat.c | |
parent | e94fa4dc30ec28a6727aa85e17aaac18b76aeadb (diff) | |
download | context-c161b7d6fe142231346cc1844e6e27c0ab7718c1.tar.gz |
2022-09-16 14:41:00
Diffstat (limited to 'source/luametatex/source/luacore/luasocket/src/compat.c')
-rw-r--r-- | source/luametatex/source/luacore/luasocket/src/compat.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/source/luametatex/source/luacore/luasocket/src/compat.c b/source/luametatex/source/luacore/luasocket/src/compat.c new file mode 100644 index 000000000..34ffdaf71 --- /dev/null +++ b/source/luametatex/source/luacore/luasocket/src/compat.c @@ -0,0 +1,39 @@ +#include "luasocket.h" +#include "compat.h" + +#if LUA_VERSION_NUM==501 + +/* +** Adapted from Lua 5.2 +*/ +void luasocket_setfuncs (lua_State *L, const luaL_Reg *l, int nup) { + luaL_checkstack(L, nup+1, "too many upvalues"); + for (; l->name != NULL; l++) { /* fill the table with given functions */ + int i; + lua_pushstring(L, l->name); + for (i = 0; i < nup; i++) /* copy upvalues to the top */ + lua_pushvalue(L, -(nup+1)); + lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */ + lua_settable(L, -(nup + 3)); + } + lua_pop(L, nup); /* remove upvalues */ +} + +/* +** Duplicated from Lua 5.2 +*/ +void *luasocket_testudata (lua_State *L, int ud, const char *tname) { + void *p = lua_touserdata(L, ud); + if (p != NULL) { /* value is a userdata? */ + if (lua_getmetatable(L, ud)) { /* does it have a metatable? */ + luaL_getmetatable(L, tname); /* get correct metatable */ + if (!lua_rawequal(L, -1, -2)) /* not the same? */ + p = NULL; /* value is a userdata with wrong metatable */ + lua_pop(L, 2); /* remove both metatables */ + return p; + } + } + return NULL; /* value is not a userdata with a metatable */ +} + +#endif |