diff options
Diffstat (limited to 'tolua++-1.0.93/src/lib/tolua_event.c')
| -rw-r--r-- | tolua++-1.0.93/src/lib/tolua_event.c | 536 |
1 files changed, 0 insertions, 536 deletions
diff --git a/tolua++-1.0.93/src/lib/tolua_event.c b/tolua++-1.0.93/src/lib/tolua_event.c deleted file mode 100644 index 8258867b4..000000000 --- a/tolua++-1.0.93/src/lib/tolua_event.c +++ /dev/null @@ -1,536 +0,0 @@ -/* tolua: event functions -** Support code for Lua bindings. -** Written by Waldemar Celes -** TeCGraf/PUC-Rio -** Apr 2003 -** $Id: $ -*/ - -/* This code is free software; you can redistribute it and/or modify it. -** The software provided hereunder is on an "as is" basis, and -** the author has no obligation to provide maintenance, support, updates, -** enhancements, or modifications. -*/ - -#include <stdio.h> - -#include "tolua++.h" - -/* Store at ubox - * It stores, creating the corresponding table if needed, - * the pair key/value in the corresponding ubox table -*/ -static void storeatubox (lua_State* L, int lo) -{ - #ifdef LUA_VERSION_NUM - lua_getfenv(L, lo); - if (lua_rawequal(L, -1, TOLUA_NOPEER)) { - lua_pop(L, 1); - lua_newtable(L); - lua_pushvalue(L, -1); - lua_setfenv(L, lo); /* stack: k,v,table */ - }; - lua_insert(L, -3); - lua_settable(L, -3); /* on lua 5.1, we trade the "tolua_peers" lookup for a settable call */ - lua_pop(L, 1); - #else - /* stack: key value (to be stored) */ - lua_pushstring(L,"tolua_peers"); - lua_rawget(L,LUA_REGISTRYINDEX); /* stack: k v ubox */ - lua_pushvalue(L,lo); - lua_rawget(L,-2); /* stack: k v ubox ubox[u] */ - if (!lua_istable(L,-1)) - { - lua_pop(L,1); /* stack: k v ubox */ - lua_newtable(L); /* stack: k v ubox table */ - lua_pushvalue(L,1); - lua_pushvalue(L,-2); /* stack: k v ubox table u table */ - lua_rawset(L,-4); /* stack: k v ubox ubox[u]=table */ - } - lua_insert(L,-4); /* put table before k */ - lua_pop(L,1); /* pop ubox */ - lua_rawset(L,-3); /* store at table */ - lua_pop(L,1); /* pop ubox[u] */ - #endif -} - -/* Module index function -*/ -static int module_index_event (lua_State* L) -{ - lua_pushstring(L,".get"); - lua_rawget(L,-3); - if (lua_istable(L,-1)) - { - lua_pushvalue(L,2); /* key */ - lua_rawget(L,-2); - if (lua_iscfunction(L,-1)) - { - lua_call(L,0,1); - return 1; - } - else if (lua_istable(L,-1)) - return 1; - } - /* call old index meta event */ - if (lua_getmetatable(L,1)) - { - lua_pushstring(L,"__index"); - lua_rawget(L,-2); - lua_pushvalue(L,1); - lua_pushvalue(L,2); - if (lua_isfunction(L,-1)) - { - lua_call(L,2,1); - return 1; - } - else if (lua_istable(L,-1)) - { - lua_gettable(L,-3); - return 1; - } - } - lua_pushnil(L); - return 1; -} - -/* Module newindex function -*/ -static int module_newindex_event (lua_State* L) -{ - lua_pushstring(L,".set"); - lua_rawget(L,-4); - if (lua_istable(L,-1)) - { - lua_pushvalue(L,2); /* key */ - lua_rawget(L,-2); - if (lua_iscfunction(L,-1)) - { - lua_pushvalue(L,1); /* only to be compatible with non-static vars */ - lua_pushvalue(L,3); /* value */ - lua_call(L,2,0); - return 0; - } - } - /* call old newindex meta event */ - if (lua_getmetatable(L,1) && lua_getmetatable(L,-1)) - { - lua_pushstring(L,"__newindex"); - lua_rawget(L,-2); - if (lua_isfunction(L,-1)) - { - lua_pushvalue(L,1); - lua_pushvalue(L,2); - lua_pushvalue(L,3); - lua_call(L,3,0); - } - } - lua_settop(L,3); - lua_rawset(L,-3); - return 0; -} - -/* Class index function - * If the object is a userdata (ie, an object), it searches the field in - * the alternative table stored in the corresponding "ubox" table. -*/ -static int class_index_event (lua_State* L) -{ - int t = lua_type(L,1); - if (t == LUA_TUSERDATA) - { - /* Access alternative table */ - #ifdef LUA_VERSION_NUM /* new macro on version 5.1 */ - lua_getfenv(L,1); - if (!lua_rawequal(L, -1, TOLUA_NOPEER)) { - lua_pushvalue(L, 2); /* key */ - lua_gettable(L, -2); /* on lua 5.1, we trade the "tolua_peers" lookup for a gettable call */ - if (!lua_isnil(L, -1)) - return 1; - }; - #else - lua_pushstring(L,"tolua_peers"); - lua_rawget(L,LUA_REGISTRYINDEX); /* stack: obj key ubox */ - lua_pushvalue(L,1); - lua_rawget(L,-2); /* stack: obj key ubox ubox[u] */ - if (lua_istable(L,-1)) - { - lua_pushvalue(L,2); /* key */ - lua_rawget(L,-2); /* stack: obj key ubox ubox[u] value */ - if (!lua_isnil(L,-1)) - return 1; - } - #endif - lua_settop(L,2); /* stack: obj key */ - /* Try metatables */ - lua_pushvalue(L,1); /* stack: obj key obj */ - while (lua_getmetatable(L,-1)) - { /* stack: obj key obj mt */ - lua_remove(L,-2); /* stack: obj key mt */ - if (lua_isnumber(L,2)) /* check if key is a numeric value */ - { - /* try operator[] */ - lua_pushstring(L,".geti"); - lua_rawget(L,-2); /* stack: obj key mt func */ - if (lua_isfunction(L,-1)) - { - lua_pushvalue(L,1); - lua_pushvalue(L,2); - lua_call(L,2,1); - return 1; - } - } - else - { - lua_pushvalue(L,2); /* stack: obj key mt key */ - lua_rawget(L,-2); /* stack: obj key mt value */ - if (!lua_isnil(L,-1)) - return 1; - else - lua_pop(L,1); - /* try C/C++ variable */ - lua_pushstring(L,".get"); - lua_rawget(L,-2); /* stack: obj key mt tget */ - if (lua_istable(L,-1)) - { - lua_pushvalue(L,2); - lua_rawget(L,-2); /* stack: obj key mt value */ - if (lua_iscfunction(L,-1)) - { - lua_pushvalue(L,1); - lua_pushvalue(L,2); - lua_call(L,2,1); - return 1; - } - else if (lua_istable(L,-1)) - { - /* deal with array: create table to be returned and cache it in ubox */ - void* u = *((void**)lua_touserdata(L,1)); - lua_newtable(L); /* stack: obj key mt value table */ - lua_pushstring(L,".self"); - lua_pushlightuserdata(L,u); - lua_rawset(L,-3); /* store usertype in ".self" */ - lua_insert(L,-2); /* stack: obj key mt table value */ - lua_setmetatable(L,-2); /* set stored value as metatable */ - lua_pushvalue(L,-1); /* stack: obj key met table table */ - lua_pushvalue(L,2); /* stack: obj key mt table table key */ - lua_insert(L,-2); /* stack: obj key mt table key table */ - storeatubox(L,1); /* stack: obj key mt table */ - return 1; - } - } - } - lua_settop(L,3); - } - lua_pushnil(L); - return 1; - } - else if (t== LUA_TTABLE) - { - module_index_event(L); - return 1; - } - lua_pushnil(L); - return 1; -} - -/* Newindex function - * It first searches for a C/C++ varaible to be set. - * Then, it either stores it in the alternative ubox table (in the case it is - * an object) or in the own table (that represents the class or module). -*/ -static int class_newindex_event (lua_State* L) -{ - int t = lua_type(L,1); - if (t == LUA_TUSERDATA) - { - /* Try accessing a C/C++ variable to be set */ - lua_getmetatable(L,1); - while (lua_istable(L,-1)) /* stack: t k v mt */ - { - if (lua_isnumber(L,2)) /* check if key is a numeric value */ - { - /* try operator[] */ - lua_pushstring(L,".seti"); - lua_rawget(L,-2); /* stack: obj key mt func */ - if (lua_isfunction(L,-1)) - { - lua_pushvalue(L,1); - lua_pushvalue(L,2); - lua_pushvalue(L,3); - lua_call(L,3,0); - return 0; - } - } - else - { - lua_pushstring(L,".set"); - lua_rawget(L,-2); /* stack: t k v mt tset */ - if (lua_istable(L,-1)) - { - lua_pushvalue(L,2); - lua_rawget(L,-2); /* stack: t k v mt tset func */ - if (lua_iscfunction(L,-1)) - { - lua_pushvalue(L,1); - lua_pushvalue(L,3); - lua_call(L,2,0); - return 0; - } - lua_pop(L,1); /* stack: t k v mt tset */ - } - lua_pop(L,1); /* stack: t k v mt */ - if (!lua_getmetatable(L,-1)) /* stack: t k v mt mt */ - lua_pushnil(L); - lua_remove(L,-2); /* stack: t k v mt */ - } - } - lua_settop(L,3); /* stack: t k v */ - - /* then, store as a new field */ - storeatubox(L,1); - } - else if (t== LUA_TTABLE) - { - module_newindex_event(L); - } - return 0; -} - -static int class_call_event(lua_State* L) { - - if (lua_istable(L, 1)) { - lua_pushstring(L, ".call"); - lua_rawget(L, 1); - if (lua_isfunction(L, -1)) { - - lua_insert(L, 1); - lua_call(L, lua_gettop(L)-1, 1); - - return 1; - }; - }; - tolua_error(L,"Attempt to call a non-callable object.",NULL); - return 0; -}; - -static int do_operator (lua_State* L, const char* op) -{ - if (lua_isuserdata(L,1)) - { - /* Try metatables */ - lua_pushvalue(L,1); /* stack: op1 op2 */ - while (lua_getmetatable(L,-1)) - { /* stack: op1 op2 op1 mt */ - lua_remove(L,-2); /* stack: op1 op2 mt */ - lua_pushstring(L,op); /* stack: op1 op2 mt key */ - lua_rawget(L,-2); /* stack: obj key mt func */ - if (lua_isfunction(L,-1)) - { - lua_pushvalue(L,1); - lua_pushvalue(L,2); - lua_call(L,2,1); - return 1; - } - lua_settop(L,3); - } - } - tolua_error(L,"Attempt to perform operation on an invalid operand",NULL); - return 0; -} - -static int class_add_event (lua_State* L) -{ - return do_operator(L,".add"); -} - -static int class_sub_event (lua_State* L) -{ - return do_operator(L,".sub"); -} - -static int class_mul_event (lua_State* L) -{ - return do_operator(L,".mul"); -} - -static int class_div_event (lua_State* L) -{ - return do_operator(L,".div"); -} - -static int class_lt_event (lua_State* L) -{ - return do_operator(L,".lt"); -} - -static int class_le_event (lua_State* L) -{ - return do_operator(L,".le"); -} - -static int class_eq_event (lua_State* L) -{ - /* copying code from do_operator here to return false when no operator is found */ - if (lua_isuserdata(L,1)) - { - /* Try metatables */ - lua_pushvalue(L,1); /* stack: op1 op2 */ - while (lua_getmetatable(L,-1)) - { /* stack: op1 op2 op1 mt */ - lua_remove(L,-2); /* stack: op1 op2 mt */ - lua_pushstring(L,".eq"); /* stack: op1 op2 mt key */ - lua_rawget(L,-2); /* stack: obj key mt func */ - if (lua_isfunction(L,-1)) - { - lua_pushvalue(L,1); - lua_pushvalue(L,2); - lua_call(L,2,1); - return 1; - } - lua_settop(L,3); - } - } - - lua_settop(L, 3); - lua_pushboolean(L, 0); - return 1; -} - -/* -static int class_gc_event (lua_State* L) -{ - void* u = *((void**)lua_touserdata(L,1)); - fprintf(stderr, "collecting: looking at %p\n", u); - lua_pushstring(L,"tolua_gc"); - lua_rawget(L,LUA_REGISTRYINDEX); - lua_pushlightuserdata(L,u); - lua_rawget(L,-2); - if (lua_isfunction(L,-1)) - { - lua_pushvalue(L,1); - lua_call(L,1,0); - lua_pushlightuserdata(L,u); - lua_pushnil(L); - lua_rawset(L,-3); - } - lua_pop(L,2); - return 0; -} -*/ -TOLUA_API int class_gc_event (lua_State* L) -{ - void* u = *((void**)lua_touserdata(L,1)); - int top; - /*fprintf(stderr, "collecting: looking at %p\n", u);*/ - /* - lua_pushstring(L,"tolua_gc"); - lua_rawget(L,LUA_REGISTRYINDEX); - */ - lua_pushvalue(L, lua_upvalueindex(1)); - lua_pushlightuserdata(L,u); - lua_rawget(L,-2); /* stack: gc umt */ - lua_getmetatable(L,1); /* stack: gc umt mt */ - /*fprintf(stderr, "checking type\n");*/ - top = lua_gettop(L); - if (tolua_fast_isa(L,top,top-1, lua_upvalueindex(2))) /* make sure we collect correct type */ - { - /*fprintf(stderr, "Found type!\n");*/ - /* get gc function */ - lua_pushliteral(L,".collector"); - lua_rawget(L,-2); /* stack: gc umt mt collector */ - if (lua_isfunction(L,-1)) { - /*fprintf(stderr, "Found .collector!\n");*/ - } - else { - lua_pop(L,1); - /*fprintf(stderr, "Using default cleanup\n");*/ - lua_pushcfunction(L,tolua_default_collect); - } - - lua_pushvalue(L,1); /* stack: gc umt mt collector u */ - lua_call(L,1,0); - - lua_pushlightuserdata(L,u); /* stack: gc umt mt u */ - lua_pushnil(L); /* stack: gc umt mt u nil */ - lua_rawset(L,-5); /* stack: gc umt mt */ - } - lua_pop(L,3); - return 0; -} - - -/* Register module events - * It expects the metatable on the top of the stack -*/ -TOLUA_API void tolua_moduleevents (lua_State* L) -{ - lua_pushstring(L,"__index"); - lua_pushcfunction(L,module_index_event); - lua_rawset(L,-3); - lua_pushstring(L,"__newindex"); - lua_pushcfunction(L,module_newindex_event); - lua_rawset(L,-3); -} - -/* Check if the object on the top has a module metatable -*/ -TOLUA_API int tolua_ismodulemetatable (lua_State* L) -{ - int r = 0; - if (lua_getmetatable(L,-1)) - { - lua_pushstring(L,"__index"); - lua_rawget(L,-2); - r = (lua_tocfunction(L,-1) == module_index_event); - lua_pop(L,2); - } - return r; -} - -/* Register class events - * It expects the metatable on the top of the stack -*/ -TOLUA_API void tolua_classevents (lua_State* L) -{ - lua_pushstring(L,"__index"); - lua_pushcfunction(L,class_index_event); - lua_rawset(L,-3); - lua_pushstring(L,"__newindex"); - lua_pushcfunction(L,class_newindex_event); - lua_rawset(L,-3); - - lua_pushstring(L,"__add"); - lua_pushcfunction(L,class_add_event); - lua_rawset(L,-3); - lua_pushstring(L,"__sub"); - lua_pushcfunction(L,class_sub_event); - lua_rawset(L,-3); - lua_pushstring(L,"__mul"); - lua_pushcfunction(L,class_mul_event); - lua_rawset(L,-3); - lua_pushstring(L,"__div"); - lua_pushcfunction(L,class_div_event); - lua_rawset(L,-3); - - lua_pushstring(L,"__lt"); - lua_pushcfunction(L,class_lt_event); - lua_rawset(L,-3); - lua_pushstring(L,"__le"); - lua_pushcfunction(L,class_le_event); - lua_rawset(L,-3); - lua_pushstring(L,"__eq"); - lua_pushcfunction(L,class_eq_event); - lua_rawset(L,-3); - - lua_pushstring(L,"__call"); - lua_pushcfunction(L,class_call_event); - lua_rawset(L,-3); - - lua_pushstring(L,"__gc"); - lua_pushstring(L, "tolua_gc_event"); - lua_rawget(L, LUA_REGISTRYINDEX); - /*lua_pushcfunction(L,class_gc_event);*/ - lua_rawset(L,-3); -} - |