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luaengine: save a copy of the search path so it doesn't get thrown away (nw)

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This commit is contained in:
cracyc 2016-04-19 13:15:50 -05:00
parent 48042b1e0a
commit 520111798e
2 changed files with 34 additions and 18 deletions
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33
src/emu/luaengine.cpp
View File

@ -1523,12 +1523,12 @@ int lua_engine::lua_screen::l_draw_text(lua_State *L)
int lua_engine::lua_emu_file::l_emu_file_read(lua_State *L)
{
emu_file *file = luabridge::Stack<emu_file *>::get(L, 1);
lua_emu_file *file = luabridge::Stack<lua_emu_file *>::get(L, 1);
luaL_argcheck(L, lua_isnumber(L, 2), 2, "length (integer) expected");
int ret, len = lua_tonumber(L, 2);
luaL_Buffer buff;
char *ptr = luaL_buffinitsize(L, &buff, len);
ret = file->read(ptr, len);
ret = file->file.read(ptr, len);
luaL_pushresultsize(&buff, ret);
return 1;
}
@ -1738,6 +1738,7 @@ int lua_engine::compile_with_env(const char *envname, const char *script, const
if(env)
{
error = luaL_loadstring(m_lua_state, env);
if(error == LUA_OK)
lua_pushvalue(m_lua_state, -2);
if((error != LUA_OK) || ((error = lua_pcall(m_lua_state, 1, 0, 0)) != LUA_OK))
{
@ -1770,6 +1771,9 @@ Tout lua_engine::run(const char *env, int ref, Tin in)
lua_settop(m_lua_state, 0);
luabridge::Stack<Tin>::push(m_lua_state, in);
run_internal(env, ref);
if(lua_isnil(m_lua_state, 1))
ret = reinterpret_cast<Tout>(0);
else
ret = luabridge::Stack<Tout>::get(m_lua_state, 1);
lua_pop(m_lua_state, 1);
return ret;
@ -1782,6 +1786,9 @@ Tout lua_engine::run(const char *env, int ref)
lua_settop(m_lua_state, 0);
lua_pushnil(m_lua_state);
run_internal(env, ref);
if(lua_isnil(m_lua_state, 1))
ret = reinterpret_cast<Tout>(0);
else
ret = luabridge::Stack<Tout>::get(m_lua_state, 1);
lua_pop(m_lua_state, 1);
return ret;
@ -1906,7 +1913,7 @@ int lua_engine::l_emu_register_menu(lua_State *L)
{
luaL_argcheck(L, lua_isfunction(L, 1), 1, "callback function expected");
luaL_argcheck(L, lua_isfunction(L, 2), 2, "callback function expected");
luaL_argcheck(L, lua_isstring(L, 3), 3, "message (string) expected");
luaL_argcheck(L, lua_isstring(L, 3), 3, "name (string) expected");
std::string name = luaL_checkstring(L, 3);
std::string cbfield = "menu_cb_" + name;
std::string popfield = "menu_pop_" + name;
@ -2476,19 +2483,15 @@ void lua_engine::initialize()
.addProperty <bool> ("is_creatable", &device_image_interface::is_creatable)
.addProperty <bool> ("is_reset_on_load", &device_image_interface::is_reset_on_load)
.endClass()
.beginClass <lua_emu_file> ("lua_file")
.addCFunction ("read", &lua_emu_file::l_emu_file_read)
.endClass()
// make sure there's a reference to the emu_file search path in your script as long as you need it
// otherwise it might be garbage collected as emu_file doesn't copy the string
.deriveClass <emu_file, lua_emu_file> ("file")
.beginClass <lua_emu_file> ("file")
.addConstructor <void (*)(const char *, UINT32)> ()
.addFunction ("open", static_cast<osd_file::error (emu_file::*)(const char *)>(&emu_file::open))
.addFunction ("open_next", &emu_file::open_next)
.addFunction ("seek", &emu_file::seek)
.addFunction ("size", &emu_file::size)
.addFunction ("filename", &emu_file::filename)
.addFunction ("fullpath", &emu_file::fullpath)
.addCFunction ("read", &lua_emu_file::l_emu_file_read)
.addFunction ("open", &lua_emu_file::open)
.addFunction ("open_next", &lua_emu_file::open_next)
.addFunction ("seek", &lua_emu_file::seek)
.addFunction ("size", &lua_emu_file::size)
.addFunction ("filename", &lua_emu_file::filename)
.addFunction ("fullpath", &lua_emu_file::fullpath)
.endClass()
.beginClass <lua_item> ("item")
.addConstructor <void (*)(int)> ()

13
src/emu/luaengine.h
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@ -208,7 +208,20 @@ private:
};
struct lua_emu_file {
lua_emu_file(const char *searchpath, UINT32 openflags) :
path(searchpath),
file(path.c_str(), openflags) {}
int l_emu_file_read(lua_State *L);
osd_file::error open(const char *name) {return file.open(name);}
osd_file::error open_next() {return file.open_next();}
int seek(INT64 offset, int whence) {return file.seek(offset, whence);}
UINT64 size() {return file.size();}
const char *filename() {return file.filename();}
const char *fullpath() {return file.fullpath();}
std::string path;
emu_file file;
};
struct lua_item {