lean2/src/bindings/lua/options.cpp

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/*
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Author: Leonardo de Moura
*/
#ifdef LEAN_USE_LUA
#include <sstream>
#include <lua.hpp>
#include "util/debug.h"
#include "util/name.h"
#include "util/sexpr/options.h"
#include "util/sexpr/option_declarations.h"
#include "bindings/lua/util.h"
#include "bindings/lua/name.h"
namespace lean {
constexpr char const * options_mt = "options.mt";
bool is_options(lua_State * L, int idx) {
return testudata(L, idx, options_mt);
}
options & to_options(lua_State * L, int idx) {
return *static_cast<options*>(luaL_checkudata(L, idx, options_mt));
}
int push_options(lua_State * L, options const & o) {
void * mem = lua_newuserdata(L, sizeof(options));
new (mem) options(o);
luaL_getmetatable(L, options_mt);
lua_setmetatable(L, -2);
return 1;
}
static int mk_option(lua_State * L) {
// int nargs = lua_gettop(L);
options r;
return push_options(L, r);
}
static name to_key(lua_State * L, int idx) {
if (lua_isstring(L, idx)) {
char const * k = luaL_checkstring(L, idx);
return name(k);
} else {
return to_name(L, idx);
}
}
static int options_gc(lua_State * L) {
to_options(L, 1).~options();
return 0;
}
static int options_tostring(lua_State * L) {
std::ostringstream out;
out << to_options(L, 1);
lua_pushfstring(L, out.str().c_str());
return 1;
}
static int options_size(lua_State * L) {
lua_pushinteger(L, to_options(L, 1).size());
return 1;
}
static int options_contains(lua_State * L) {
lua_pushboolean(L, to_options(L, 1).contains(to_key(L, 2)));
return 1;
}
static int options_empty(lua_State * L) {
lua_pushboolean(L, to_options(L, 1).empty());
return 1;
}
static int options_get_bool(lua_State * L) {
int nargs = lua_gettop(L);
bool defval = nargs < 3 ? false : lua_toboolean(L, 3);
lua_pushboolean(L, to_options(L, 1).get_bool(to_key(L, 2), defval));
return 1;
}
static int options_get_int(lua_State * L) {
int nargs = lua_gettop(L);
int defval = nargs < 3 ? 0 : lua_tointeger(L, 3);
lua_pushinteger(L, to_options(L, 1).get_int(to_key(L, 2), defval));
return 1;
}
static int options_get_unsigned(lua_State * L) {
int nargs = lua_gettop(L);
unsigned defval = nargs < 3 ? 0 : lua_tointeger(L, 3);
lua_pushnumber(L, to_options(L, 1).get_unsigned(to_key(L, 2), defval));
return 1;
}
static int options_get_double(lua_State * L) {
int nargs = lua_gettop(L);
double defval = nargs < 3 ? 0.0 : lua_tonumber(L, 3);
lua_pushnumber(L, to_options(L, 1).get_double(to_key(L, 2), defval));
return 1;
}
static int options_get_string(lua_State * L) {
int nargs = lua_gettop(L);
char const * defval = nargs < 3 ? "" : lua_tostring(L, 3);
lua_pushfstring(L, to_options(L, 1).get_string(to_key(L, 2), defval));
return 1;
}
static int options_update_bool(lua_State * L) {
return push_options(L, to_options(L, 1).update(to_key(L, 2), static_cast<bool>(lua_toboolean(L, 3))));
}
static int options_update_int(lua_State * L) {
return push_options(L, to_options(L, 1).update(to_key(L, 2), static_cast<int>(lua_tointeger(L, 3))));
}
static int options_update_unsigned(lua_State * L) {
return push_options(L, to_options(L, 1).update(to_key(L, 2), static_cast<unsigned>(lua_tointeger(L, 3))));
}
static int options_update_double(lua_State * L) {
return push_options(L, to_options(L, 1).update(to_key(L, 2), lua_tonumber(L, 3)));
}
static int options_update_string(lua_State * L) {
return push_options(L, to_options(L, 1).update(to_key(L, 2), lua_tostring(L, 3)));
}
static int options_get(lua_State * L) {
name k = to_key(L, 2);
auto it = get_option_declarations().find(k);
if (it == get_option_declarations().end()) {
return luaL_error(L, "unknown option '%s'", k.to_string().c_str());
} else {
option_declaration const & d = it->second;
switch (d.kind()) {
case BoolOption: return options_get_bool(L);
case IntOption: return options_get_int(L);
case UnsignedOption: return options_get_unsigned(L);
case DoubleOption: return options_get_double(L);
case StringOption: return options_get_string(L);
default: return luaL_error(L, "unsupported option kind for '%s'", k.to_string().c_str());
}
}
}
static int options_update(lua_State * L) {
name k = to_key(L, 2);
auto it = get_option_declarations().find(k);
if (it == get_option_declarations().end()) {
return luaL_error(L, "unknown option '%s'", k.to_string().c_str());
} else {
option_declaration const & d = it->second;
switch (d.kind()) {
case BoolOption: return options_update_bool(L);
case IntOption: return options_update_int(L);
case UnsignedOption: return options_update_unsigned(L);
case DoubleOption: return options_update_double(L);
case StringOption: return options_update_string(L);
default: return luaL_error(L, "unsupported option kind for '%s'", k.to_string().c_str());
}
}
}
static const struct luaL_Reg options_m[] = {
{"__gc", options_gc}, // never throws
{"__tostring", safe_function<options_tostring>},
{"__len", safe_function<options_size> },
{"contains", safe_function<options_contains>},
{"size", safe_function<options_size>},
{"empty", safe_function<options_empty>},
{"get", safe_function<options_get>},
{"update", safe_function<options_update>},
// low-level API
{"get_bool", safe_function<options_get_bool>},
{"get_int", safe_function<options_get_int>},
{"get_unsigned", safe_function<options_get_unsigned>},
{"get_double", safe_function<options_get_double>},
{"get_string", safe_function<options_get_string>},
{"update_bool", safe_function<options_update_bool>},
{"update_int", safe_function<options_update_int>},
{"update_unsigned", safe_function<options_update_unsigned>},
{"update_double", safe_function<options_update_double>},
{"update_string", safe_function<options_update_string>},
{0, 0}
};
void open_options(lua_State * L) {
luaL_newmetatable(L, options_mt);
lua_pushvalue(L, -1);
lua_setfield(L, -2, "__index");
setfuncs(L, options_m, 0);
lua_pushcfunction(L, safe_function<mk_option>);
lua_setglobal(L, "options");
}
}
#endif