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Diffstat (limited to 'tolua++-1.0.93/src/lib/tolua_map.c')
-rw-r--r--tolua++-1.0.93/src/lib/tolua_map.c704
1 files changed, 704 insertions, 0 deletions
diff --git a/tolua++-1.0.93/src/lib/tolua_map.c b/tolua++-1.0.93/src/lib/tolua_map.c
new file mode 100644
index 000000000..d00e7069b
--- /dev/null
+++ b/tolua++-1.0.93/src/lib/tolua_map.c
@@ -0,0 +1,704 @@
+/* tolua: functions to map features
+** 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 "tolua++.h"
+#include "tolua_event.h"
+#include "lauxlib.h"
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+
+/* Create metatable
+ * Create and register new metatable
+*/
+static int tolua_newmetatable (lua_State* L, char* name)
+{
+ int r = luaL_newmetatable(L,name);
+
+ #ifdef LUA_VERSION_NUM /* only lua 5.1 */
+ if (r) {
+ lua_pushvalue(L, -1);
+ lua_pushstring(L, name);
+ lua_settable(L, LUA_REGISTRYINDEX); /* reg[mt] = type_name */
+ };
+ #endif
+
+ if (r)
+ tolua_classevents(L); /* set meta events */
+ lua_pop(L,1);
+ return r;
+}
+
+/* Map super classes
+ * It sets 'name' as being also a 'base', mapping all super classes of 'base' in 'name'
+*/
+static void mapsuper (lua_State* L, const char* name, const char* base)
+{
+ /* push registry.super */
+ lua_pushstring(L,"tolua_super");
+ lua_rawget(L,LUA_REGISTRYINDEX); /* stack: super */
+ luaL_getmetatable(L,name); /* stack: super mt */
+ lua_rawget(L,-2); /* stack: super table */
+ if (lua_isnil(L,-1))
+ {
+ /* create table */
+ lua_pop(L,1);
+ lua_newtable(L); /* stack: super table */
+ luaL_getmetatable(L,name); /* stack: super table mt */
+ lua_pushvalue(L,-2); /* stack: super table mt table */
+ lua_rawset(L,-4); /* stack: super table */
+ }
+
+ /* set base as super class */
+ lua_pushstring(L,base);
+ lua_pushboolean(L,1);
+ lua_rawset(L,-3); /* stack: super table */
+
+ /* set all super class of base as super class of name */
+ luaL_getmetatable(L,base); /* stack: super table base_mt */
+ lua_rawget(L,-3); /* stack: super table base_table */
+ if (lua_istable(L,-1))
+ {
+ /* traverse base table */
+ lua_pushnil(L); /* first key */
+ while (lua_next(L,-2) != 0)
+ {
+ /* stack: ... base_table key value */
+ lua_pushvalue(L,-2); /* stack: ... base_table key value key */
+ lua_insert(L,-2); /* stack: ... base_table key key value */
+ lua_rawset(L,-5); /* stack: ... base_table key */
+ }
+ }
+ lua_pop(L,3); /* stack: <empty> */
+}
+
+/* creates a 'tolua_ubox' table for base clases, and
+// expects the metatable and base metatable on the stack */
+static void set_ubox(lua_State* L) {
+
+ /* mt basemt */
+ if (!lua_isnil(L, -1)) {
+ lua_pushstring(L, "tolua_ubox");
+ lua_rawget(L,-2);
+ } else {
+ lua_pushnil(L);
+ };
+ /* mt basemt base_ubox */
+ if (!lua_isnil(L,-1)) {
+ lua_pushstring(L, "tolua_ubox");
+ lua_insert(L, -2);
+ /* mt basemt key ubox */
+ lua_rawset(L,-4);
+ /* (mt with ubox) basemt */
+ } else {
+ /* mt basemt nil */
+ lua_pop(L, 1);
+ lua_pushstring(L,"tolua_ubox"); lua_newtable(L);
+ /* make weak value metatable for ubox table to allow userdata to be
+ garbage-collected */
+ lua_newtable(L); lua_pushliteral(L, "__mode"); lua_pushliteral(L, "v"); lua_rawset(L, -3); /* stack: string ubox mt */
+ lua_setmetatable(L, -2); /* stack:mt basemt string ubox */
+ lua_rawset(L,-4);
+ };
+
+};
+
+/* Map inheritance
+ * It sets 'name' as derived from 'base' by setting 'base' as metatable of 'name'
+*/
+static void mapinheritance (lua_State* L, const char* name, const char* base)
+{
+ /* set metatable inheritance */
+ luaL_getmetatable(L,name);
+
+ if (base && *base)
+ luaL_getmetatable(L,base);
+ else {
+
+ if (lua_getmetatable(L, -1)) { /* already has a mt, we don't overwrite it */
+ lua_pop(L, 2);
+ return;
+ };
+ luaL_getmetatable(L,"tolua_commonclass");
+ };
+
+ set_ubox(L);
+
+ lua_setmetatable(L,-2);
+ lua_pop(L,1);
+}
+
+/* Object type
+*/
+static int tolua_bnd_type (lua_State* L)
+{
+ tolua_typename(L,lua_gettop(L));
+ return 1;
+}
+
+/* Take ownership
+*/
+static int tolua_bnd_takeownership (lua_State* L)
+{
+ int success = 0;
+ if (lua_isuserdata(L,1))
+ {
+ if (lua_getmetatable(L,1)) /* if metatable? */
+ {
+ lua_pop(L,1); /* clear metatable off stack */
+ /* force garbage collection to avoid C to reuse a to-be-collected address */
+ #ifdef LUA_VERSION_NUM
+ lua_gc(L, LUA_GCCOLLECT, 0);
+ #else
+ lua_setgcthreshold(L,0);
+ #endif
+
+ success = tolua_register_gc(L,1);
+ }
+ }
+ lua_pushboolean(L,success!=0);
+ return 1;
+}
+
+/* Release ownership
+*/
+static int tolua_bnd_releaseownership (lua_State* L)
+{
+ int done = 0;
+ if (lua_isuserdata(L,1))
+ {
+ void* u = *((void**)lua_touserdata(L,1));
+ /* force garbage collection to avoid releasing a to-be-collected address */
+ #ifdef LUA_VERSION_NUM
+ lua_gc(L, LUA_GCCOLLECT, 0);
+ #else
+ lua_setgcthreshold(L,0);
+ #endif
+ lua_pushstring(L,"tolua_gc");
+ lua_rawget(L,LUA_REGISTRYINDEX);
+ lua_pushlightuserdata(L,u);
+ lua_rawget(L,-2);
+ lua_getmetatable(L,1);
+ if (lua_rawequal(L,-1,-2)) /* check that we are releasing the correct type */
+ {
+ lua_pushlightuserdata(L,u);
+ lua_pushnil(L);
+ lua_rawset(L,-5);
+ done = 1;
+ }
+ }
+ lua_pushboolean(L,done!=0);
+ return 1;
+}
+
+/* Type casting
+*/
+static int tolua_bnd_cast (lua_State* L)
+{
+
+/* // old code
+ void* v = tolua_tousertype(L,1,NULL);
+ const char* s = tolua_tostring(L,2,NULL);
+ if (v && s)
+ tolua_pushusertype(L,v,s);
+ else
+ lua_pushnil(L);
+ return 1;
+*/
+
+ void* v;
+ const char* s;
+ if (lua_islightuserdata(L, 1)) {
+ v = tolua_touserdata(L, 1, NULL);
+ } else {
+ v = tolua_tousertype(L, 1, 0);
+ };
+
+ s = tolua_tostring(L,2,NULL);
+ if (v && s)
+ tolua_pushusertype(L,v,s);
+ else
+ lua_pushnil(L);
+ return 1;
+}
+
+/* Inheritance
+*/
+static int tolua_bnd_inherit (lua_State* L) {
+
+ /* stack: lua object, c object */
+ lua_pushstring(L, ".c_instance");
+ lua_pushvalue(L, -2);
+ lua_rawset(L, -4);
+ /* l_obj[".c_instance"] = c_obj */
+
+ return 0;
+};
+
+#ifdef LUA_VERSION_NUM /* lua 5.1 */
+static int tolua_bnd_setpeer(lua_State* L) {
+
+ /* stack: userdata, table */
+ if (!lua_isuserdata(L, -2)) {
+ lua_pushstring(L, "Invalid argument #1 to setpeer: userdata expected.");
+ lua_error(L);
+ };
+
+ if (lua_isnil(L, -1)) {
+
+ lua_pop(L, 1);
+ lua_pushvalue(L, TOLUA_NOPEER);
+ };
+ lua_setfenv(L, -2);
+
+ return 0;
+};
+
+static int tolua_bnd_getpeer(lua_State* L) {
+
+ /* stack: userdata */
+ lua_getfenv(L, -1);
+ if (lua_rawequal(L, -1, TOLUA_NOPEER)) {
+ lua_pop(L, 1);
+ lua_pushnil(L);
+ };
+ return 1;
+};
+#endif
+
+/* static int class_gc_event (lua_State* L); */
+
+TOLUA_API void tolua_open (lua_State* L)
+{
+ int top = lua_gettop(L);
+ lua_pushstring(L,"tolua_opened");
+ lua_rawget(L,LUA_REGISTRYINDEX);
+ if (!lua_isboolean(L,-1))
+ {
+ lua_pushstring(L,"tolua_opened"); lua_pushboolean(L,1); lua_rawset(L,LUA_REGISTRYINDEX);
+
+ #ifndef LUA_VERSION_NUM /* only prior to lua 5.1 */
+ /* create peer object table */
+ lua_pushstring(L, "tolua_peers"); lua_newtable(L);
+ /* make weak key metatable for peers indexed by userdata object */
+ lua_newtable(L); lua_pushliteral(L, "__mode"); lua_pushliteral(L, "k"); lua_rawset(L, -3); /* stack: string peers mt */
+ lua_setmetatable(L, -2); /* stack: string peers */
+ lua_rawset(L,LUA_REGISTRYINDEX);
+ #endif
+
+ /* create object ptr -> udata mapping table */
+ lua_pushstring(L,"tolua_ubox"); lua_newtable(L);
+ /* make weak value metatable for ubox table to allow userdata to be
+ garbage-collected */
+ lua_newtable(L); lua_pushliteral(L, "__mode"); lua_pushliteral(L, "v"); lua_rawset(L, -3); /* stack: string ubox mt */
+ lua_setmetatable(L, -2); /* stack: string ubox */
+ lua_rawset(L,LUA_REGISTRYINDEX);
+
+ lua_pushstring(L,"tolua_super"); lua_newtable(L); lua_rawset(L,LUA_REGISTRYINDEX);
+ lua_pushstring(L,"tolua_gc"); lua_newtable(L);lua_rawset(L,LUA_REGISTRYINDEX);
+
+ /* create gc_event closure */
+ lua_pushstring(L, "tolua_gc_event");
+ lua_pushstring(L, "tolua_gc");
+ lua_rawget(L, LUA_REGISTRYINDEX);
+ lua_pushstring(L, "tolua_super");
+ lua_rawget(L, LUA_REGISTRYINDEX);
+ lua_pushcclosure(L, class_gc_event, 2);
+ lua_rawset(L, LUA_REGISTRYINDEX);
+
+ tolua_newmetatable(L,"tolua_commonclass");
+
+ tolua_module(L,NULL,0);
+ tolua_beginmodule(L,NULL);
+ tolua_module(L,"tolua",0);
+ tolua_beginmodule(L,"tolua");
+ tolua_function(L,"type",tolua_bnd_type);
+ tolua_function(L,"takeownership",tolua_bnd_takeownership);
+ tolua_function(L,"releaseownership",tolua_bnd_releaseownership);
+ tolua_function(L,"cast",tolua_bnd_cast);
+ tolua_function(L,"inherit", tolua_bnd_inherit);
+ #ifdef LUA_VERSION_NUM /* lua 5.1 */
+ tolua_function(L, "setpeer", tolua_bnd_setpeer);
+ tolua_function(L, "getpeer", tolua_bnd_getpeer);
+ #endif
+
+ tolua_endmodule(L);
+ tolua_endmodule(L);
+ }
+ lua_settop(L,top);
+}
+
+/* Copy a C object
+*/
+TOLUA_API void* tolua_copy (lua_State* L, void* value, unsigned int size)
+{
+ void* clone = (void*)malloc(size);
+ if (clone)
+ memcpy(clone,value,size);
+ else
+ tolua_error(L,"insuficient memory",NULL);
+ return clone;
+}
+
+/* Default collect function
+*/
+TOLUA_API int tolua_default_collect (lua_State* tolua_S)
+{
+ void* self = tolua_tousertype(tolua_S,1,0);
+ free(self);
+ return 0;
+}
+
+/* Do clone
+*/
+TOLUA_API int tolua_register_gc (lua_State* L, int lo)
+{
+ int success = 1;
+ void *value = *(void **)lua_touserdata(L,lo);
+ lua_pushstring(L,"tolua_gc");
+ lua_rawget(L,LUA_REGISTRYINDEX);
+ lua_pushlightuserdata(L,value);
+ lua_rawget(L,-2);
+ if (!lua_isnil(L,-1)) /* make sure that object is not already owned */
+ success = 0;
+ else
+ {
+ lua_pushlightuserdata(L,value);
+ lua_getmetatable(L,lo);
+ lua_rawset(L,-4);
+ }
+ lua_pop(L,2);
+ return success;
+}
+
+/* Register a usertype
+ * It creates the correspoding metatable in the registry, for both 'type' and 'const type'.
+ * It maps 'const type' as being also a 'type'
+*/
+TOLUA_API void tolua_usertype (lua_State* L, const char* type)
+{
+ char ctype[128] = "const ";
+ strncat(ctype,type,120);
+
+ /* create both metatables */
+ if (tolua_newmetatable(L,ctype) && tolua_newmetatable(L,type))
+ mapsuper(L,type,ctype); /* 'type' is also a 'const type' */
+}
+
+
+/* Begin module
+ * It pushes the module (or class) table on the stack
+*/
+TOLUA_API void tolua_beginmodule (lua_State* L, const char* name)
+{
+ if (name)
+ {
+ lua_pushstring(L,name);
+ lua_rawget(L,-2);
+ }
+ else
+ lua_pushvalue(L,LUA_GLOBALSINDEX);
+}
+
+/* End module
+ * It pops the module (or class) from the stack
+*/
+TOLUA_API void tolua_endmodule (lua_State* L)
+{
+ lua_pop(L,1);
+}
+
+/* Map module
+ * It creates a new module
+*/
+#if 1
+TOLUA_API void tolua_module (lua_State* L, const char* name, int hasvar)
+{
+ if (name)
+ {
+ /* tolua module */
+ lua_pushstring(L,name);
+ lua_rawget(L,-2);
+ if (!lua_istable(L,-1)) /* check if module already exists */
+ {
+ lua_pop(L,1);
+ lua_newtable(L);
+ lua_pushstring(L,name);
+ lua_pushvalue(L,-2);
+ lua_rawset(L,-4); /* assing module into module */
+ }
+ }
+ else
+ {
+ /* global table */
+ lua_pushvalue(L,LUA_GLOBALSINDEX);
+ }
+ if (hasvar)
+ {
+ if (!tolua_ismodulemetatable(L)) /* check if it already has a module metatable */
+ {
+ /* create metatable to get/set C/C++ variable */
+ lua_newtable(L);
+ tolua_moduleevents(L);
+ if (lua_getmetatable(L,-2))
+ lua_setmetatable(L,-2); /* set old metatable as metatable of metatable */
+ lua_setmetatable(L,-2);
+ }
+ }
+ lua_pop(L,1); /* pop module */
+}
+#else
+TOLUA_API void tolua_module (lua_State* L, const char* name, int hasvar)
+{
+ if (name)
+ {
+ /* tolua module */
+ lua_pushstring(L,name);
+ lua_newtable(L);
+ }
+ else
+ {
+ /* global table */
+ lua_pushvalue(L,LUA_GLOBALSINDEX);
+ }
+ if (hasvar)
+ {
+ /* create metatable to get/set C/C++ variable */
+ lua_newtable(L);
+ tolua_moduleevents(L);
+ if (lua_getmetatable(L,-2))
+ lua_setmetatable(L,-2); /* set old metatable as metatable of metatable */
+ lua_setmetatable(L,-2);
+ }
+ if (name)
+ lua_rawset(L,-3); /* assing module into module */
+ else
+ lua_pop(L,1); /* pop global table */
+}
+#endif
+
+static void push_collector(lua_State* L, const char* type, lua_CFunction col) {
+
+ /* push collector function, but only if it's not NULL, or if there's no
+ collector already */
+ if (!col) return;
+ luaL_getmetatable(L,type);
+ lua_pushstring(L,".collector");
+ /*
+ if (!col) {
+ lua_pushvalue(L, -1);
+ lua_rawget(L, -3);
+ if (!lua_isnil(L, -1)) {
+ lua_pop(L, 3);
+ return;
+ };
+ lua_pop(L, 1);
+ };
+ // */
+ lua_pushcfunction(L,col);
+
+ lua_rawset(L,-3);
+ lua_pop(L, 1);
+};
+
+/* Map C class
+ * It maps a C class, setting the appropriate inheritance and super classes.
+*/
+TOLUA_API void tolua_cclass (lua_State* L, const char* lname, const char* name, const char* base, lua_CFunction col)
+{
+ char cname[128] = "const ";
+ char cbase[128] = "const ";
+ strncat(cname,name,120);
+ strncat(cbase,base,120);
+
+ mapinheritance(L,name,base);
+ mapinheritance(L,cname,name);
+
+ mapsuper(L,cname,cbase);
+ mapsuper(L,name,base);
+
+ lua_pushstring(L,lname);
+
+ push_collector(L, name, col);
+ /*
+ luaL_getmetatable(L,name);
+ lua_pushstring(L,".collector");
+ lua_pushcfunction(L,col);
+
+ lua_rawset(L,-3);
+ */
+
+ luaL_getmetatable(L,name);
+ lua_rawset(L,-3); /* assign class metatable to module */
+
+ /* now we also need to store the collector table for the const
+ instances of the class */
+ push_collector(L, cname, col);
+ /*
+ luaL_getmetatable(L,cname);
+ lua_pushstring(L,".collector");
+ lua_pushcfunction(L,col);
+ lua_rawset(L,-3);
+ lua_pop(L,1);
+ */
+
+
+}
+
+/* Add base
+ * It adds additional base classes to a class (for multiple inheritance)
+ * (not for now)
+TOLUA_API void tolua_addbase(lua_State* L, char* name, char* base) {
+
+ char cname[128] = "const ";
+ char cbase[128] = "const ";
+ strncat(cname,name,120);
+ strncat(cbase,base,120);
+
+ mapsuper(L,cname,cbase);
+ mapsuper(L,name,base);
+};
+*/
+
+/* Map function
+ * It assigns a function into the current module (or class)
+*/
+TOLUA_API void tolua_function (lua_State* L, const char* name, lua_CFunction func)
+{
+ lua_pushstring(L,name);
+ lua_pushcfunction(L,func);
+ lua_rawset(L,-3);
+}
+
+/* sets the __call event for the class (expects the class' main table on top) */
+/* never really worked :(
+TOLUA_API void tolua_set_call_event(lua_State* L, lua_CFunction func, char* type) {
+
+ lua_getmetatable(L, -1);
+ //luaL_getmetatable(L, type);
+ lua_pushstring(L,"__call");
+ lua_pushcfunction(L,func);
+ lua_rawset(L,-3);
+ lua_pop(L, 1);
+};
+*/
+
+/* Map constant number
+ * It assigns a constant number into the current module (or class)
+*/
+TOLUA_API void tolua_constant (lua_State* L, const char* name, lua_Number value)
+{
+ lua_pushstring(L,name);
+ tolua_pushnumber(L,value);
+ lua_rawset(L,-3);
+}
+
+
+/* Map variable
+ * It assigns a variable into the current module (or class)
+*/
+TOLUA_API void tolua_variable (lua_State* L, const char* name, lua_CFunction get, lua_CFunction set)
+{
+ /* get func */
+ lua_pushstring(L,".get");
+ lua_rawget(L,-2);
+ if (!lua_istable(L,-1))
+ {
+ /* create .get table, leaving it at the top */
+ lua_pop(L,1);
+ lua_newtable(L);
+ lua_pushstring(L,".get");
+ lua_pushvalue(L,-2);
+ lua_rawset(L,-4);
+ }
+ lua_pushstring(L,name);
+ lua_pushcfunction(L,get);
+ lua_rawset(L,-3); /* store variable */
+ lua_pop(L,1); /* pop .get table */
+
+ /* set func */
+ if (set)
+ {
+ lua_pushstring(L,".set");
+ lua_rawget(L,-2);
+ if (!lua_istable(L,-1))
+ {
+ /* create .set table, leaving it at the top */
+ lua_pop(L,1);
+ lua_newtable(L);
+ lua_pushstring(L,".set");
+ lua_pushvalue(L,-2);
+ lua_rawset(L,-4);
+ }
+ lua_pushstring(L,name);
+ lua_pushcfunction(L,set);
+ lua_rawset(L,-3); /* store variable */
+ lua_pop(L,1); /* pop .set table */
+ }
+}
+
+/* Access const array
+ * It reports an error when trying to write into a const array
+*/
+static int const_array (lua_State* L)
+{
+ luaL_error(L,"value of const array cannot be changed");
+ return 0;
+}
+
+/* Map an array
+ * It assigns an array into the current module (or class)
+*/
+TOLUA_API void tolua_array (lua_State* L, const char* name, lua_CFunction get, lua_CFunction set)
+{
+ lua_pushstring(L,".get");
+ lua_rawget(L,-2);
+ if (!lua_istable(L,-1))
+ {
+ /* create .get table, leaving it at the top */
+ lua_pop(L,1);
+ lua_newtable(L);
+ lua_pushstring(L,".get");
+ lua_pushvalue(L,-2);
+ lua_rawset(L,-4);
+ }
+ lua_pushstring(L,name);
+
+ lua_newtable(L); /* create array metatable */
+ lua_pushvalue(L,-1);
+ lua_setmetatable(L,-2); /* set the own table as metatable (for modules) */
+ lua_pushstring(L,"__index");
+ lua_pushcfunction(L,get);
+ lua_rawset(L,-3);
+ lua_pushstring(L,"__newindex");
+ lua_pushcfunction(L,set?set:const_array);
+ lua_rawset(L,-3);
+
+ lua_rawset(L,-3); /* store variable */
+ lua_pop(L,1); /* pop .get table */
+}
+
+
+TOLUA_API void tolua_dobuffer(lua_State* L, char* B, unsigned int size, const char* name) {
+
+ #ifdef LUA_VERSION_NUM /* lua 5.1 */
+ luaL_loadbuffer(L, B, size, name) || lua_pcall(L, 0, 0, 0);
+ #else
+ lua_dobuffer(L, B, size, name);
+ #endif
+};
+
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