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authorfaketruth <faketruth@0a769ca7-a7f5-676a-18bf-c427514a06d6>2011-10-03 21:25:04 +0200
committerfaketruth <faketruth@0a769ca7-a7f5-676a-18bf-c427514a06d6>2011-10-03 21:25:04 +0200
commitaafef187ef856a36c3f8e599afea2dee44f08904 (patch)
treec84762cc768da2800a0f80b902c704e782bd29ef /tolua++-1.0.93/src/lib/tolua_event.c
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Diffstat (limited to 'tolua++-1.0.93/src/lib/tolua_event.c')
-rw-r--r--tolua++-1.0.93/src/lib/tolua_event.c536
1 files changed, 536 insertions, 0 deletions
diff --git a/tolua++-1.0.93/src/lib/tolua_event.c b/tolua++-1.0.93/src/lib/tolua_event.c
new file mode 100644
index 000000000..8258867b4
--- /dev/null
+++ b/tolua++-1.0.93/src/lib/tolua_event.c
@@ -0,0 +1,536 @@
+/* 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);
+}
+