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luaengine: fix read/write item (nw)

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This commit is contained in:
cracyc 2016-04-07 16:42:29 -05:00
parent 07b676038d
commit 65455f3369
1 changed files with 37 additions and 5 deletions
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42
src/emu/luaengine.cpp
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@ -755,12 +755,29 @@ int lua_engine::lua_item::l_item_read(lua_State *L)
{ {
luaL_argcheck(L, lua_isnumber(L, 2), 2, "offset (integer) expected"); luaL_argcheck(L, lua_isnumber(L, 2), 2, "offset (integer) expected");
int offset = lua_tounsigned(L, 2); int offset = lua_tounsigned(L, 2);
if(!l_item_base || (offset > (l_item_size * l_item_count))) int ret = 0;
if(!l_item_base || (offset > l_item_count))
{ {
lua_pushnil(L); lua_pushnil(L);
return 1; return 1;
} }
lua_pushunsigned(L, ((char *)l_item_base)[offset]); switch(l_item_size)
{
case 1:
default:
ret = ((UINT8 *)l_item_base)[offset];
break;
case 2:
ret = ((UINT16 *)l_item_base)[offset];
break;
case 4:
ret = ((UINT32 *)l_item_base)[offset];
break;
case 8:
ret = ((UINT64 *)l_item_base)[offset];
break;
}
lua_pushunsigned(L, ret);
return 1; return 1;
} }
@ -769,10 +786,25 @@ int lua_engine::lua_item::l_item_write(lua_State *L)
luaL_argcheck(L, lua_isnumber(L, 2), 2, "offset (integer) expected"); luaL_argcheck(L, lua_isnumber(L, 2), 2, "offset (integer) expected");
luaL_argcheck(L, lua_isnumber(L, 3), 3, "value (integer) expected"); luaL_argcheck(L, lua_isnumber(L, 3), 3, "value (integer) expected");
int offset = lua_tounsigned(L, 2); int offset = lua_tounsigned(L, 2);
UINT8 value = lua_tounsigned(L, 3); UINT64 value = lua_tounsigned(L, 3);
if(!l_item_base || (offset > (l_item_size * l_item_count))) if(!l_item_base || (offset > l_item_count))
return 1; return 1;
((char *)l_item_base)[offset] = value; switch(l_item_size)
{
case 1:
default:
((UINT8 *)l_item_base)[offset] = (UINT8)value;
break;
case 2:
((UINT16 *)l_item_base)[offset] = (UINT16)value;
break;
case 4:
((UINT32 *)l_item_base)[offset] = (UINT32)value;
break;
case 8:
((UINT64 *)l_item_base)[offset] = (UINT64)value;
break;
}
return 1; return 1;
} }