| [997] | 1 | /* tolua: functions to map features |
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| 2 | ** Support code for Lua bindings. |
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| 3 | ** Written by Waldemar Celes |
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| 4 | ** TeCGraf/PUC-Rio |
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| 5 | ** Apr 2003 |
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| 6 | ** $Id: $ |
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| 7 | */ |
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| 8 | |
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| 9 | /* This code is free software; you can redistribute it and/or modify it. |
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| 10 | ** The software provided hereunder is on an "as is" basis, and |
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| 11 | ** the author has no obligation to provide maintenance, support, updates, |
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| 12 | ** enhancements, or modifications. |
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| 13 | */ |
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| 14 | |
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| 15 | #include "tolua++.h" |
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| 16 | #include "tolua_event.h" |
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| 17 | #include "lauxlib.h" |
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| 18 | |
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| 19 | #include <string.h> |
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| 20 | #include <stdio.h> |
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| 21 | #include <stdlib.h> |
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| 22 | #include <math.h> |
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| 23 | |
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| 24 | |
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| 25 | /* Create metatable |
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| 26 | * Create and register new metatable |
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| 27 | */ |
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| 28 | static int tolua_newmetatable (lua_State* L, char* name) |
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| 29 | { |
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| 30 | int r = luaL_newmetatable(L,name); |
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| 31 | |
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| 32 | #ifdef LUA_VERSION_NUM /* only lua 5.1 */ |
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| 33 | if (r) { |
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| 34 | lua_pushvalue(L, -1); |
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| 35 | lua_pushstring(L, name); |
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| 36 | lua_settable(L, LUA_REGISTRYINDEX); /* reg[mt] = type_name */ |
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| 37 | }; |
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| 38 | #endif |
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| 39 | |
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| 40 | if (r) |
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| 41 | tolua_classevents(L); /* set meta events */ |
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| 42 | lua_pop(L,1); |
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| 43 | return r; |
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| 44 | } |
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| 45 | |
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| 46 | /* Map super classes |
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| 47 | * It sets 'name' as being also a 'base', mapping all super classes of 'base' in 'name' |
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| 48 | */ |
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| 49 | static void mapsuper (lua_State* L, const char* name, const char* base) |
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| 50 | { |
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| 51 | /* push registry.super */ |
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| 52 | lua_pushstring(L,"tolua_super"); |
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| 53 | lua_rawget(L,LUA_REGISTRYINDEX); /* stack: super */ |
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| 54 | luaL_getmetatable(L,name); /* stack: super mt */ |
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| 55 | lua_rawget(L,-2); /* stack: super table */ |
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| 56 | if (lua_isnil(L,-1)) |
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| 57 | { |
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| 58 | /* create table */ |
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| 59 | lua_pop(L,1); |
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| 60 | lua_newtable(L); /* stack: super table */ |
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| 61 | luaL_getmetatable(L,name); /* stack: super table mt */ |
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| 62 | lua_pushvalue(L,-2); /* stack: super table mt table */ |
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| 63 | lua_rawset(L,-4); /* stack: super table */ |
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| 64 | } |
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| 65 | |
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| 66 | /* set base as super class */ |
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| 67 | lua_pushstring(L,base); |
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| 68 | lua_pushboolean(L,1); |
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| 69 | lua_rawset(L,-3); /* stack: super table */ |
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| 70 | |
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| 71 | /* set all super class of base as super class of name */ |
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| 72 | luaL_getmetatable(L,base); /* stack: super table base_mt */ |
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| 73 | lua_rawget(L,-3); /* stack: super table base_table */ |
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| 74 | if (lua_istable(L,-1)) |
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| 75 | { |
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| 76 | /* traverse base table */ |
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| 77 | lua_pushnil(L); /* first key */ |
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| 78 | while (lua_next(L,-2) != 0) |
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| 79 | { |
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| 80 | /* stack: ... base_table key value */ |
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| 81 | lua_pushvalue(L,-2); /* stack: ... base_table key value key */ |
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| 82 | lua_insert(L,-2); /* stack: ... base_table key key value */ |
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| 83 | lua_rawset(L,-5); /* stack: ... base_table key */ |
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| 84 | } |
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| 85 | } |
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| 86 | lua_pop(L,3); /* stack: <empty> */ |
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| 87 | } |
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| 88 | |
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| 89 | /* creates a 'tolua_ubox' table for base clases, and |
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| 90 | // expects the metatable and base metatable on the stack */ |
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| 91 | static void set_ubox(lua_State* L) { |
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| 92 | |
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| 93 | /* mt basemt */ |
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| 94 | if (!lua_isnil(L, -1)) { |
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| 95 | lua_pushstring(L, "tolua_ubox"); |
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| 96 | lua_rawget(L,-2); |
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| 97 | } else { |
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| 98 | lua_pushnil(L); |
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| 99 | }; |
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| 100 | /* mt basemt base_ubox */ |
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| 101 | if (!lua_isnil(L,-1)) { |
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| 102 | lua_pushstring(L, "tolua_ubox"); |
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| 103 | lua_insert(L, -2); |
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| 104 | /* mt basemt key ubox */ |
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| 105 | lua_rawset(L,-4); |
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| 106 | /* (mt with ubox) basemt */ |
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| 107 | } else { |
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| 108 | /* mt basemt nil */ |
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| 109 | lua_pop(L, 1); |
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| 110 | lua_pushstring(L,"tolua_ubox"); lua_newtable(L); |
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| 111 | /* make weak value metatable for ubox table to allow userdata to be |
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| 112 | garbage-collected */ |
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| 113 | lua_newtable(L); lua_pushliteral(L, "__mode"); lua_pushliteral(L, "v"); lua_rawset(L, -3); /* stack: string ubox mt */ |
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| 114 | lua_setmetatable(L, -2); /* stack:mt basemt string ubox */ |
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| 115 | lua_rawset(L,-4); |
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| 116 | }; |
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| 117 | |
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| 118 | }; |
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| 119 | |
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| 120 | /* Map inheritance |
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| 121 | * It sets 'name' as derived from 'base' by setting 'base' as metatable of 'name' |
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| 122 | */ |
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| 123 | static void mapinheritance (lua_State* L, const char* name, const char* base) |
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| 124 | { |
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| 125 | /* set metatable inheritance */ |
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| 126 | luaL_getmetatable(L,name); |
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| 127 | |
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| 128 | if (base && *base) |
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| 129 | luaL_getmetatable(L,base); |
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| 130 | else { |
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| 131 | |
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| 132 | if (lua_getmetatable(L, -1)) { /* already has a mt, we don't overwrite it */ |
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| 133 | lua_pop(L, 2); |
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| 134 | return; |
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| 135 | }; |
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| 136 | luaL_getmetatable(L,"tolua_commonclass"); |
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| 137 | }; |
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| 138 | |
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| 139 | set_ubox(L); |
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| 140 | |
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| 141 | lua_setmetatable(L,-2); |
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| 142 | lua_pop(L,1); |
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| 143 | } |
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| 144 | |
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| 145 | /* Object type |
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| 146 | */ |
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| 147 | static int tolua_bnd_type (lua_State* L) |
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| 148 | { |
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| 149 | tolua_typename(L,lua_gettop(L)); |
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| 150 | return 1; |
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| 151 | } |
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| 152 | |
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| 153 | /* Take ownership |
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| 154 | */ |
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| 155 | static int tolua_bnd_takeownership (lua_State* L) |
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| 156 | { |
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| 157 | int success = 0; |
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| 158 | if (lua_isuserdata(L,1)) |
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| 159 | { |
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| 160 | if (lua_getmetatable(L,1)) /* if metatable? */ |
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| 161 | { |
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| 162 | lua_pop(L,1); /* clear metatable off stack */ |
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| 163 | /* force garbage collection to avoid C to reuse a to-be-collected address */ |
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| 164 | #ifdef LUA_VERSION_NUM |
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| 165 | lua_gc(L, LUA_GCCOLLECT, 0); |
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| 166 | #else |
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| 167 | lua_setgcthreshold(L,0); |
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| 168 | #endif |
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| 169 | |
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| 170 | success = tolua_register_gc(L,1); |
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| 171 | } |
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| 172 | } |
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| 173 | lua_pushboolean(L,success!=0); |
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| 174 | return 1; |
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| 175 | } |
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| 176 | |
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| 177 | /* Release ownership |
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| 178 | */ |
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| 179 | static int tolua_bnd_releaseownership (lua_State* L) |
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| 180 | { |
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| 181 | int done = 0; |
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| 182 | if (lua_isuserdata(L,1)) |
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| 183 | { |
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| 184 | void* u = *((void**)lua_touserdata(L,1)); |
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| 185 | /* force garbage collection to avoid releasing a to-be-collected address */ |
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| 186 | #ifdef LUA_VERSION_NUM |
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| 187 | lua_gc(L, LUA_GCCOLLECT, 0); |
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| 188 | #else |
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| 189 | lua_setgcthreshold(L,0); |
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| 190 | #endif |
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| 191 | lua_pushstring(L,"tolua_gc"); |
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| 192 | lua_rawget(L,LUA_REGISTRYINDEX); |
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| 193 | lua_pushlightuserdata(L,u); |
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| 194 | lua_rawget(L,-2); |
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| 195 | lua_getmetatable(L,1); |
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| 196 | if (lua_rawequal(L,-1,-2)) /* check that we are releasing the correct type */ |
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| 197 | { |
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| 198 | lua_pushlightuserdata(L,u); |
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| 199 | lua_pushnil(L); |
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| 200 | lua_rawset(L,-5); |
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| 201 | done = 1; |
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| 202 | } |
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| 203 | } |
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| 204 | lua_pushboolean(L,done!=0); |
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| 205 | return 1; |
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| 206 | } |
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| 207 | |
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| 208 | /* Type casting |
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| 209 | */ |
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| 210 | static int tolua_bnd_cast (lua_State* L) |
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| 211 | { |
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| 212 | |
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| 213 | /* // old code |
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| 214 | void* v = tolua_tousertype(L,1,NULL); |
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| 215 | const char* s = tolua_tostring(L,2,NULL); |
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| 216 | if (v && s) |
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| 217 | tolua_pushusertype(L,v,s); |
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| 218 | else |
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| 219 | lua_pushnil(L); |
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| 220 | return 1; |
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| 221 | */ |
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| 222 | |
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| 223 | void* v; |
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| 224 | const char* s; |
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| 225 | if (lua_islightuserdata(L, 1)) { |
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| 226 | v = tolua_touserdata(L, 1, NULL); |
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| 227 | } else { |
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| 228 | v = tolua_tousertype(L, 1, 0); |
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| 229 | }; |
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| 230 | |
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| 231 | s = tolua_tostring(L,2,NULL); |
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| 232 | if (v && s) |
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| 233 | tolua_pushusertype(L,v,s); |
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| 234 | else |
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| 235 | lua_pushnil(L); |
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| 236 | return 1; |
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| 237 | } |
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| 238 | |
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| 239 | /* Inheritance |
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| 240 | */ |
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| 241 | static int tolua_bnd_inherit (lua_State* L) { |
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| 242 | |
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| 243 | /* stack: lua object, c object */ |
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| 244 | lua_pushstring(L, ".c_instance"); |
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| 245 | lua_pushvalue(L, -2); |
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| 246 | lua_rawset(L, -4); |
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| 247 | /* l_obj[".c_instance"] = c_obj */ |
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| 248 | |
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| 249 | return 0; |
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| 250 | }; |
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| 251 | |
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| 252 | #ifdef LUA_VERSION_NUM /* lua 5.1 */ |
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| 253 | static int tolua_bnd_setpeer(lua_State* L) { |
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| 254 | |
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| 255 | /* stack: userdata, table */ |
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| 256 | if (!lua_isuserdata(L, -2)) { |
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| 257 | lua_pushstring(L, "Invalid argument #1 to setpeer: userdata expected."); |
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| 258 | lua_error(L); |
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| 259 | }; |
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| 260 | |
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| 261 | if (lua_isnil(L, -1)) { |
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| 262 | |
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| 263 | lua_pop(L, 1); |
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| 264 | lua_pushvalue(L, TOLUA_NOPEER); |
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| 265 | }; |
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| 266 | lua_setfenv(L, -2); |
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| 267 | |
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| 268 | return 0; |
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| 269 | }; |
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| 270 | |
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| 271 | static int tolua_bnd_getpeer(lua_State* L) { |
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| 272 | |
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| 273 | /* stack: userdata */ |
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| 274 | lua_getfenv(L, -1); |
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| 275 | if (lua_rawequal(L, -1, TOLUA_NOPEER)) { |
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| 276 | lua_pop(L, 1); |
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| 277 | lua_pushnil(L); |
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| 278 | }; |
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| 279 | return 1; |
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| 280 | }; |
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| 281 | #endif |
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| 282 | |
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| 283 | /* static int class_gc_event (lua_State* L); */ |
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| 284 | |
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| 285 | TOLUA_API void tolua_open (lua_State* L) |
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| 286 | { |
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| 287 | int top = lua_gettop(L); |
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| 288 | lua_pushstring(L,"tolua_opened"); |
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| 289 | lua_rawget(L,LUA_REGISTRYINDEX); |
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| 290 | if (!lua_isboolean(L,-1)) |
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| 291 | { |
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| 292 | lua_pushstring(L,"tolua_opened"); lua_pushboolean(L,1); lua_rawset(L,LUA_REGISTRYINDEX); |
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| 293 | |
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| 294 | #ifndef LUA_VERSION_NUM /* only prior to lua 5.1 */ |
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| 295 | /* create peer object table */ |
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| 296 | lua_pushstring(L, "tolua_peers"); lua_newtable(L); |
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| 297 | /* make weak key metatable for peers indexed by userdata object */ |
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| 298 | lua_newtable(L); lua_pushliteral(L, "__mode"); lua_pushliteral(L, "k"); lua_rawset(L, -3); /* stack: string peers mt */ |
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| 299 | lua_setmetatable(L, -2); /* stack: string peers */ |
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| 300 | lua_rawset(L,LUA_REGISTRYINDEX); |
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| 301 | #endif |
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| 302 | |
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| 303 | /* create object ptr -> udata mapping table */ |
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| 304 | lua_pushstring(L,"tolua_ubox"); lua_newtable(L); |
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| 305 | /* make weak value metatable for ubox table to allow userdata to be |
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| 306 | garbage-collected */ |
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| 307 | lua_newtable(L); lua_pushliteral(L, "__mode"); lua_pushliteral(L, "v"); lua_rawset(L, -3); /* stack: string ubox mt */ |
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| 308 | lua_setmetatable(L, -2); /* stack: string ubox */ |
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| 309 | lua_rawset(L,LUA_REGISTRYINDEX); |
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| 310 | |
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| 311 | lua_pushstring(L,"tolua_super"); lua_newtable(L); lua_rawset(L,LUA_REGISTRYINDEX); |
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| 312 | lua_pushstring(L,"tolua_gc"); lua_newtable(L);lua_rawset(L,LUA_REGISTRYINDEX); |
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| 313 | |
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| 314 | /* create gc_event closure */ |
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| 315 | lua_pushstring(L, "tolua_gc_event"); |
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| 316 | lua_pushstring(L, "tolua_gc"); |
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| 317 | lua_rawget(L, LUA_REGISTRYINDEX); |
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| 318 | lua_pushstring(L, "tolua_super"); |
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| 319 | lua_rawget(L, LUA_REGISTRYINDEX); |
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| 320 | lua_pushcclosure(L, class_gc_event, 2); |
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| 321 | lua_rawset(L, LUA_REGISTRYINDEX); |
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| 322 | |
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| 323 | tolua_newmetatable(L,"tolua_commonclass"); |
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| 324 | |
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| 325 | tolua_module(L,NULL,0); |
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| 326 | tolua_beginmodule(L,NULL); |
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| 327 | tolua_module(L,"tolua",0); |
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| 328 | tolua_beginmodule(L,"tolua"); |
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| 329 | tolua_function(L,"type",tolua_bnd_type); |
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| 330 | tolua_function(L,"takeownership",tolua_bnd_takeownership); |
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| 331 | tolua_function(L,"releaseownership",tolua_bnd_releaseownership); |
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| 332 | tolua_function(L,"cast",tolua_bnd_cast); |
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| 333 | tolua_function(L,"inherit", tolua_bnd_inherit); |
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| 334 | #ifdef LUA_VERSION_NUM /* lua 5.1 */ |
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| 335 | tolua_function(L, "setpeer", tolua_bnd_setpeer); |
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| 336 | tolua_function(L, "getpeer", tolua_bnd_getpeer); |
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| 337 | #endif |
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| 338 | |
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| 339 | tolua_endmodule(L); |
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| 340 | tolua_endmodule(L); |
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| 341 | } |
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| 342 | lua_settop(L,top); |
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| 343 | } |
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| 344 | |
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| 345 | /* Copy a C object |
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| 346 | */ |
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| 347 | TOLUA_API void* tolua_copy (lua_State* L, void* value, unsigned int size) |
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| 348 | { |
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| 349 | void* clone = (void*)malloc(size); |
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| 350 | if (clone) |
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| 351 | memcpy(clone,value,size); |
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| 352 | else |
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| 353 | tolua_error(L,"insuficient memory",NULL); |
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| 354 | return clone; |
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| 355 | } |
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| 356 | |
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| 357 | /* Default collect function |
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| 358 | */ |
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| 359 | TOLUA_API int tolua_default_collect (lua_State* tolua_S) |
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| 360 | { |
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| 361 | void* self = tolua_tousertype(tolua_S,1,0); |
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| 362 | free(self); |
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| 363 | return 0; |
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| 364 | } |
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| 365 | |
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| 366 | /* Do clone |
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| 367 | */ |
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| 368 | TOLUA_API int tolua_register_gc (lua_State* L, int lo) |
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| 369 | { |
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| 370 | int success = 1; |
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| 371 | void *value = *(void **)lua_touserdata(L,lo); |
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| 372 | lua_pushstring(L,"tolua_gc"); |
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| 373 | lua_rawget(L,LUA_REGISTRYINDEX); |
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| 374 | lua_pushlightuserdata(L,value); |
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| 375 | lua_rawget(L,-2); |
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| 376 | if (!lua_isnil(L,-1)) /* make sure that object is not already owned */ |
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| 377 | success = 0; |
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| 378 | else |
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| 379 | { |
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| 380 | lua_pushlightuserdata(L,value); |
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| 381 | lua_getmetatable(L,lo); |
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| 382 | lua_rawset(L,-4); |
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| 383 | } |
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| 384 | lua_pop(L,2); |
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| 385 | return success; |
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| 386 | } |
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| 387 | |
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| 388 | /* Register a usertype |
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| 389 | * It creates the correspoding metatable in the registry, for both 'type' and 'const type'. |
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| 390 | * It maps 'const type' as being also a 'type' |
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| 391 | */ |
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| 392 | TOLUA_API void tolua_usertype (lua_State* L, char* type) |
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| 393 | { |
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| 394 | char ctype[128] = "const "; |
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| 395 | strncat(ctype,type,120); |
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| 396 | |
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| 397 | /* create both metatables */ |
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| 398 | if (tolua_newmetatable(L,ctype) && tolua_newmetatable(L,type)) |
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| 399 | mapsuper(L,type,ctype); /* 'type' is also a 'const type' */ |
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| 400 | } |
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| 401 | |
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| 402 | |
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| 403 | /* Begin module |
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| 404 | * It pushes the module (or class) table on the stack |
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| 405 | */ |
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| 406 | TOLUA_API void tolua_beginmodule (lua_State* L, char* name) |
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| 407 | { |
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| 408 | if (name) |
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| 409 | { |
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| 410 | lua_pushstring(L,name); |
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| 411 | lua_rawget(L,-2); |
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| 412 | } |
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| 413 | else |
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| 414 | lua_pushvalue(L,LUA_GLOBALSINDEX); |
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| 415 | } |
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| 416 | |
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| 417 | /* End module |
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| 418 | * It pops the module (or class) from the stack |
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| 419 | */ |
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| 420 | TOLUA_API void tolua_endmodule (lua_State* L) |
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| 421 | { |
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| 422 | lua_pop(L,1); |
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| 423 | } |
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| 424 | |
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| 425 | /* Map module |
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| 426 | * It creates a new module |
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| 427 | */ |
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| 428 | #if 1 |
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| 429 | TOLUA_API void tolua_module (lua_State* L, char* name, int hasvar) |
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| 430 | { |
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| 431 | if (name) |
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| 432 | { |
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| 433 | /* tolua module */ |
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| 434 | lua_pushstring(L,name); |
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| 435 | lua_rawget(L,-2); |
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| 436 | if (!lua_istable(L,-1)) /* check if module already exists */ |
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| 437 | { |
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| 438 | lua_pop(L,1); |
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| 439 | lua_newtable(L); |
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| 440 | lua_pushstring(L,name); |
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| 441 | lua_pushvalue(L,-2); |
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| 442 | lua_rawset(L,-4); /* assing module into module */ |
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| 443 | } |
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| 444 | } |
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| 445 | else |
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| 446 | { |
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| 447 | /* global table */ |
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| 448 | lua_pushvalue(L,LUA_GLOBALSINDEX); |
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| 449 | } |
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| 450 | if (hasvar) |
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| 451 | { |
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| 452 | if (!tolua_ismodulemetatable(L)) /* check if it already has a module metatable */ |
|---|
| 453 | { |
|---|
| 454 | /* create metatable to get/set C/C++ variable */ |
|---|
| 455 | lua_newtable(L); |
|---|
| 456 | tolua_moduleevents(L); |
|---|
| 457 | if (lua_getmetatable(L,-2)) |
|---|
| 458 | lua_setmetatable(L,-2); /* set old metatable as metatable of metatable */ |
|---|
| 459 | lua_setmetatable(L,-2); |
|---|
| 460 | } |
|---|
| 461 | } |
|---|
| 462 | lua_pop(L,1); /* pop module */ |
|---|
| 463 | } |
|---|
| 464 | #else |
|---|
| 465 | TOLUA_API void tolua_module (lua_State* L, char* name, int hasvar) |
|---|
| 466 | { |
|---|
| 467 | if (name) |
|---|
| 468 | { |
|---|
| 469 | /* tolua module */ |
|---|
| 470 | lua_pushstring(L,name); |
|---|
| 471 | lua_newtable(L); |
|---|
| 472 | } |
|---|
| 473 | else |
|---|
| 474 | { |
|---|
| 475 | /* global table */ |
|---|
| 476 | lua_pushvalue(L,LUA_GLOBALSINDEX); |
|---|
| 477 | } |
|---|
| 478 | if (hasvar) |
|---|
| 479 | { |
|---|
| 480 | /* create metatable to get/set C/C++ variable */ |
|---|
| 481 | lua_newtable(L); |
|---|
| 482 | tolua_moduleevents(L); |
|---|
| 483 | if (lua_getmetatable(L,-2)) |
|---|
| 484 | lua_setmetatable(L,-2); /* set old metatable as metatable of metatable */ |
|---|
| 485 | lua_setmetatable(L,-2); |
|---|
| 486 | } |
|---|
| 487 | if (name) |
|---|
| 488 | lua_rawset(L,-3); /* assing module into module */ |
|---|
| 489 | else |
|---|
| 490 | lua_pop(L,1); /* pop global table */ |
|---|
| 491 | } |
|---|
| 492 | #endif |
|---|
| 493 | |
|---|
| 494 | static void push_collector(lua_State* L, const char* type, lua_CFunction col) { |
|---|
| 495 | |
|---|
| 496 | /* push collector function, but only if it's not NULL, or if there's no |
|---|
| 497 | collector already */ |
|---|
| 498 | if (!col) return; |
|---|
| 499 | luaL_getmetatable(L,type); |
|---|
| 500 | lua_pushstring(L,".collector"); |
|---|
| 501 | /* |
|---|
| 502 | if (!col) { |
|---|
| 503 | lua_pushvalue(L, -1); |
|---|
| 504 | lua_rawget(L, -3); |
|---|
| 505 | if (!lua_isnil(L, -1)) { |
|---|
| 506 | lua_pop(L, 3); |
|---|
| 507 | return; |
|---|
| 508 | }; |
|---|
| 509 | lua_pop(L, 1); |
|---|
| 510 | }; |
|---|
| 511 | // */ |
|---|
| 512 | lua_pushcfunction(L,col); |
|---|
| 513 | |
|---|
| 514 | lua_rawset(L,-3); |
|---|
| 515 | lua_pop(L, 1); |
|---|
| 516 | }; |
|---|
| 517 | |
|---|
| 518 | /* Map C class |
|---|
| 519 | * It maps a C class, setting the appropriate inheritance and super classes. |
|---|
| 520 | */ |
|---|
| 521 | TOLUA_API void tolua_cclass (lua_State* L, char* lname, char* name, char* base, lua_CFunction col) |
|---|
| 522 | { |
|---|
| 523 | char cname[128] = "const "; |
|---|
| 524 | char cbase[128] = "const "; |
|---|
| 525 | strncat(cname,name,120); |
|---|
| 526 | strncat(cbase,base,120); |
|---|
| 527 | |
|---|
| 528 | mapinheritance(L,name,base); |
|---|
| 529 | mapinheritance(L,cname,name); |
|---|
| 530 | |
|---|
| 531 | mapsuper(L,cname,cbase); |
|---|
| 532 | mapsuper(L,name,base); |
|---|
| 533 | |
|---|
| 534 | lua_pushstring(L,lname); |
|---|
| 535 | |
|---|
| 536 | push_collector(L, name, col); |
|---|
| 537 | /* |
|---|
| 538 | luaL_getmetatable(L,name); |
|---|
| 539 | lua_pushstring(L,".collector"); |
|---|
| 540 | lua_pushcfunction(L,col); |
|---|
| 541 | |
|---|
| 542 | lua_rawset(L,-3); |
|---|
| 543 | */ |
|---|
| 544 | |
|---|
| 545 | luaL_getmetatable(L,name); |
|---|
| 546 | lua_rawset(L,-3); /* assign class metatable to module */ |
|---|
| 547 | |
|---|
| 548 | /* now we also need to store the collector table for the const |
|---|
| 549 | instances of the class */ |
|---|
| 550 | push_collector(L, cname, col); |
|---|
| 551 | /* |
|---|
| 552 | luaL_getmetatable(L,cname); |
|---|
| 553 | lua_pushstring(L,".collector"); |
|---|
| 554 | lua_pushcfunction(L,col); |
|---|
| 555 | lua_rawset(L,-3); |
|---|
| 556 | lua_pop(L,1); |
|---|
| 557 | */ |
|---|
| 558 | |
|---|
| 559 | |
|---|
| 560 | } |
|---|
| 561 | |
|---|
| 562 | /* Add base |
|---|
| 563 | * It adds additional base classes to a class (for multiple inheritance) |
|---|
| 564 | * (not for now) |
|---|
| 565 | TOLUA_API void tolua_addbase(lua_State* L, char* name, char* base) { |
|---|
| 566 | |
|---|
| 567 | char cname[128] = "const "; |
|---|
| 568 | char cbase[128] = "const "; |
|---|
| 569 | strncat(cname,name,120); |
|---|
| 570 | strncat(cbase,base,120); |
|---|
| 571 | |
|---|
| 572 | mapsuper(L,cname,cbase); |
|---|
| 573 | mapsuper(L,name,base); |
|---|
| 574 | }; |
|---|
| 575 | */ |
|---|
| 576 | |
|---|
| 577 | /* Map function |
|---|
| 578 | * It assigns a function into the current module (or class) |
|---|
| 579 | */ |
|---|
| 580 | TOLUA_API void tolua_function (lua_State* L, char* name, lua_CFunction func) |
|---|
| 581 | { |
|---|
| 582 | lua_pushstring(L,name); |
|---|
| 583 | lua_pushcfunction(L,func); |
|---|
| 584 | lua_rawset(L,-3); |
|---|
| 585 | } |
|---|
| 586 | |
|---|
| 587 | /* sets the __call event for the class (expects the class' main table on top) */ |
|---|
| 588 | /* never really worked :( |
|---|
| 589 | TOLUA_API void tolua_set_call_event(lua_State* L, lua_CFunction func, char* type) { |
|---|
| 590 | |
|---|
| 591 | lua_getmetatable(L, -1); |
|---|
| 592 | //luaL_getmetatable(L, type); |
|---|
| 593 | lua_pushstring(L,"__call"); |
|---|
| 594 | lua_pushcfunction(L,func); |
|---|
| 595 | lua_rawset(L,-3); |
|---|
| 596 | lua_pop(L, 1); |
|---|
| 597 | }; |
|---|
| 598 | */ |
|---|
| 599 | |
|---|
| 600 | /* Map constant number |
|---|
| 601 | * It assigns a constant number into the current module (or class) |
|---|
| 602 | */ |
|---|
| 603 | TOLUA_API void tolua_constant (lua_State* L, char* name, double value) |
|---|
| 604 | { |
|---|
| 605 | lua_pushstring(L,name); |
|---|
| 606 | tolua_pushnumber(L,value); |
|---|
| 607 | lua_rawset(L,-3); |
|---|
| 608 | } |
|---|
| 609 | |
|---|
| 610 | |
|---|
| 611 | /* Map variable |
|---|
| 612 | * It assigns a variable into the current module (or class) |
|---|
| 613 | */ |
|---|
| 614 | TOLUA_API void tolua_variable (lua_State* L, char* name, lua_CFunction get, lua_CFunction set) |
|---|
| 615 | { |
|---|
| 616 | /* get func */ |
|---|
| 617 | lua_pushstring(L,".get"); |
|---|
| 618 | lua_rawget(L,-2); |
|---|
| 619 | if (!lua_istable(L,-1)) |
|---|
| 620 | { |
|---|
| 621 | /* create .get table, leaving it at the top */ |
|---|
| 622 | lua_pop(L,1); |
|---|
| 623 | lua_newtable(L); |
|---|
| 624 | lua_pushstring(L,".get"); |
|---|
| 625 | lua_pushvalue(L,-2); |
|---|
| 626 | lua_rawset(L,-4); |
|---|
| 627 | } |
|---|
| 628 | lua_pushstring(L,name); |
|---|
| 629 | lua_pushcfunction(L,get); |
|---|
| 630 | lua_rawset(L,-3); /* store variable */ |
|---|
| 631 | lua_pop(L,1); /* pop .get table */ |
|---|
| 632 | |
|---|
| 633 | /* set func */ |
|---|
| 634 | if (set) |
|---|
| 635 | { |
|---|
| 636 | lua_pushstring(L,".set"); |
|---|
| 637 | lua_rawget(L,-2); |
|---|
| 638 | if (!lua_istable(L,-1)) |
|---|
| 639 | { |
|---|
| 640 | /* create .set table, leaving it at the top */ |
|---|
| 641 | lua_pop(L,1); |
|---|
| 642 | lua_newtable(L); |
|---|
| 643 | lua_pushstring(L,".set"); |
|---|
| 644 | lua_pushvalue(L,-2); |
|---|
| 645 | lua_rawset(L,-4); |
|---|
| 646 | } |
|---|
| 647 | lua_pushstring(L,name); |
|---|
| 648 | lua_pushcfunction(L,set); |
|---|
| 649 | lua_rawset(L,-3); /* store variable */ |
|---|
| 650 | lua_pop(L,1); /* pop .set table */ |
|---|
| 651 | } |
|---|
| 652 | } |
|---|
| 653 | |
|---|
| 654 | /* Access const array |
|---|
| 655 | * It reports an error when trying to write into a const array |
|---|
| 656 | */ |
|---|
| 657 | static int const_array (lua_State* L) |
|---|
| 658 | { |
|---|
| 659 | luaL_error(L,"value of const array cannot be changed"); |
|---|
| 660 | return 0; |
|---|
| 661 | } |
|---|
| 662 | |
|---|
| 663 | /* Map an array |
|---|
| 664 | * It assigns an array into the current module (or class) |
|---|
| 665 | */ |
|---|
| 666 | TOLUA_API void tolua_array (lua_State* L, char* name, lua_CFunction get, lua_CFunction set) |
|---|
| 667 | { |
|---|
| 668 | lua_pushstring(L,".get"); |
|---|
| 669 | lua_rawget(L,-2); |
|---|
| 670 | if (!lua_istable(L,-1)) |
|---|
| 671 | { |
|---|
| 672 | /* create .get table, leaving it at the top */ |
|---|
| 673 | lua_pop(L,1); |
|---|
| 674 | lua_newtable(L); |
|---|
| 675 | lua_pushstring(L,".get"); |
|---|
| 676 | lua_pushvalue(L,-2); |
|---|
| 677 | lua_rawset(L,-4); |
|---|
| 678 | } |
|---|
| 679 | lua_pushstring(L,name); |
|---|
| 680 | |
|---|
| 681 | lua_newtable(L); /* create array metatable */ |
|---|
| 682 | lua_pushvalue(L,-1); |
|---|
| 683 | lua_setmetatable(L,-2); /* set the own table as metatable (for modules) */ |
|---|
| 684 | lua_pushstring(L,"__index"); |
|---|
| 685 | lua_pushcfunction(L,get); |
|---|
| 686 | lua_rawset(L,-3); |
|---|
| 687 | lua_pushstring(L,"__newindex"); |
|---|
| 688 | lua_pushcfunction(L,set?set:const_array); |
|---|
| 689 | lua_rawset(L,-3); |
|---|
| 690 | |
|---|
| 691 | lua_rawset(L,-3); /* store variable */ |
|---|
| 692 | lua_pop(L,1); /* pop .get table */ |
|---|
| 693 | } |
|---|
| 694 | |
|---|
| 695 | |
|---|
| 696 | TOLUA_API void tolua_dobuffer(lua_State* L, char* B, unsigned int size, const char* name) { |
|---|
| 697 | |
|---|
| 698 | #ifdef LUA_VERSION_NUM /* lua 5.1 */ |
|---|
| 699 | luaL_loadbuffer(L, B, size, name) || lua_pcall(L, 0, 0, 0); |
|---|
| 700 | #else |
|---|
| 701 | lua_dobuffer(L, B, size, name); |
|---|
| 702 | #endif |
|---|
| 703 | }; |
|---|
| 704 | |
|---|