100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
/*
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Copyright (c) 2013 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#include "util/lua.h"
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#include "util/luaref.h"
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#include "util/splay_map.h"
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namespace lean {
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typedef splay_map<luaref, luaref, luaref_lt_proc> lua_splay_map;
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DECL_UDATA(lua_splay_map)
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static int mk_lua_splay_map(lua_State * L) {
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lua_splay_map r;
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return push_lua_splay_map(L, r);
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}
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static int lua_splay_map_size(lua_State * L) {
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lua_pushinteger(L, to_lua_splay_map(L, 1).size());
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return 1;
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}
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static int lua_splay_map_contains(lua_State * L) {
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lua_pushboolean(L, to_lua_splay_map(L, 1).contains(luaref(L, 2)));
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return 1;
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}
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static int lua_splay_map_empty(lua_State * L) {
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lua_pushboolean(L, to_lua_splay_map(L, 1).empty());
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return 1;
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}
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static int lua_splay_map_insert(lua_State * L) {
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to_lua_splay_map(L, 1).insert(luaref(L, 2), luaref(L, 3));
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return 0;
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}
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static int lua_splay_map_erase(lua_State * L) {
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to_lua_splay_map(L, 1).erase(luaref(L, 2));
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return 0;
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}
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static int lua_splay_map_find(lua_State * L) {
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lua_splay_map & m = to_lua_splay_map(L, 1);
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luaref const * val = m.find(luaref(L, 2));
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if (val) {
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lean_assert(val->get_state() == L);
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val->push();
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} else {
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lua_pushnil(L);
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}
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return 1;
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}
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static int lua_splay_map_copy(lua_State * L) {
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return push_lua_splay_map(L, to_lua_splay_map(L, 1));
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}
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static int lua_splay_map_for_each(lua_State * L) {
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// Remark: we take a copy of the map to make sure
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// for_each will not crash if the map is updated while being
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// traversed.
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// The copy operation is very cheap O(1).
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lua_splay_map m(to_lua_splay_map(L, 1)); // map
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luaL_checktype(L, 2, LUA_TFUNCTION); // user-fun
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m.for_each([&](luaref const & k, luaref const & v) {
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lua_pushvalue(L, 2); // push user-fun
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k.push();
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v.push();
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pcall(L, 2, 0, 0);
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});
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return 0;
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}
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static const struct luaL_Reg lua_splay_map_m[] = {
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{"__gc", lua_splay_map_gc}, // never throws
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{"__len", safe_function<lua_splay_map_size> },
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{"contains", safe_function<lua_splay_map_contains>},
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{"size", safe_function<lua_splay_map_size>},
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{"empty", safe_function<lua_splay_map_empty>},
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{"insert", safe_function<lua_splay_map_insert>},
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{"erase", safe_function<lua_splay_map_erase>},
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{"find", safe_function<lua_splay_map_find>},
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{"copy", safe_function<lua_splay_map_copy>},
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{"for_each", safe_function<lua_splay_map_for_each>},
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{0, 0}
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};
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void open_splay_map(lua_State * L) {
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luaL_newmetatable(L, lua_splay_map_mt);
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lua_pushvalue(L, -1);
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lua_setfield(L, -2, "__index");
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setfuncs(L, lua_splay_map_m, 0);
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SET_GLOBAL_FUN(mk_lua_splay_map, "splay_map");
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SET_GLOBAL_FUN(lua_splay_map_pred, "is_splay_map");
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}
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}
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