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authorRoberto Ierusalimschy <roberto@inf.puc-rio.br>2018-02-27 15:47:32 -0300
committerRoberto Ierusalimschy <roberto@inf.puc-rio.br>2018-02-27 15:47:32 -0300
commit34b00c16e28c2bbc3e633b4007de956130905ed6 (patch)
treefca960c3f8f1945a052a776722ccef4944b748fa /lauxlib.c
parent12110dec0eda3813b7609051aedb0cde932fbf93 (diff)
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removed compatibility code with older versions
Diffstat (limited to 'lauxlib.c')
-rw-r--r--lauxlib.c83
1 files changed, 1 insertions, 82 deletions
diff --git a/lauxlib.c b/lauxlib.c
index febd3eb1..215a83b1 100644
--- a/lauxlib.c
+++ b/lauxlib.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lauxlib.c,v 1.292 2018/01/29 19:13:27 roberto Exp roberto $ 2** $Id: lauxlib.c,v 1.293 2018/02/21 13:48:44 roberto Exp roberto $
3** Auxiliary functions for building Lua libraries 3** Auxiliary functions for building Lua libraries
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -846,87 +846,6 @@ LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
846 846
847 847
848/* 848/*
849** {======================================================
850** Compatibility with 5.1 module functions
851** =======================================================
852*/
853#if defined(LUA_COMPAT_MODULE)
854
855static const char *luaL_findtable (lua_State *L, int idx,
856 const char *fname, int szhint) {
857 const char *e;
858 if (idx) lua_pushvalue(L, idx);
859 do {
860 e = strchr(fname, '.');
861 if (e == NULL) e = fname + strlen(fname);
862 lua_pushlstring(L, fname, e - fname);
863 if (lua_rawget(L, -2) == LUA_TNIL) { /* no such field? */
864 lua_pop(L, 1); /* remove this nil */
865 lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */
866 lua_pushlstring(L, fname, e - fname);
867 lua_pushvalue(L, -2);
868 lua_settable(L, -4); /* set new table into field */
869 }
870 else if (!lua_istable(L, -1)) { /* field has a non-table value? */
871 lua_pop(L, 2); /* remove table and value */
872 return fname; /* return problematic part of the name */
873 }
874 lua_remove(L, -2); /* remove previous table */
875 fname = e + 1;
876 } while (*e == '.');
877 return NULL;
878}
879
880
881/*
882** Count number of elements in a luaL_Reg list.
883*/
884static int libsize (const luaL_Reg *l) {
885 int size = 0;
886 for (; l && l->name; l++) size++;
887 return size;
888}
889
890
891/*
892** Find or create a module table with a given name. The function
893** first looks at the LOADED table and, if that fails, try a
894** global variable with that name. In any case, leaves on the stack
895** the module table.
896*/
897LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname,
898 int sizehint) {
899 luaL_findtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE, 1);
900 if (lua_getfield(L, -1, modname) != LUA_TTABLE) { /* no LOADED[modname]? */
901 lua_pop(L, 1); /* remove previous result */
902 /* try global variable (and create one if it does not exist) */
903 lua_pushglobaltable(L);
904 if (luaL_findtable(L, 0, modname, sizehint) != NULL)
905 luaL_error(L, "name conflict for module '%s'", modname);
906 lua_pushvalue(L, -1);
907 lua_setfield(L, -3, modname); /* LOADED[modname] = new table */
908 }
909 lua_remove(L, -2); /* remove LOADED table */
910}
911
912
913LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
914 const luaL_Reg *l, int nup) {
915 luaL_checkversion(L);
916 if (libname) {
917 luaL_pushmodule(L, libname, libsize(l)); /* get/create library table */
918 lua_insert(L, -(nup + 1)); /* move library table to below upvalues */
919 }
920 if (l)
921 luaL_setfuncs(L, l, nup);
922 else
923 lua_pop(L, nup); /* remove upvalues */
924}
925
926#endif
927/* }====================================================== */
928
929/*
930** set functions from list 'l' into table at top - 'nup'; each 849** set functions from list 'l' into table at top - 'nup'; each
931** function gets the 'nup' elements at the top as upvalues. 850** function gets the 'nup' elements at the top as upvalues.
932** Returns with only the table at the stack. 851** Returns with only the table at the stack.