83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
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/*
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Copyright (c) 2014 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 <limits>
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#include "util/lua_named_param.h"
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#include "util/sstream.h"
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namespace lean {
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bool get_bool_named_param(lua_State * L, int idx, char const * opt_name, bool def_value) {
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if (lua_istable(L, idx)) {
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bool result = def_value;
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push_string(L, opt_name);
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lua_gettable(L, idx);
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if (lua_isboolean(L, -1)) {
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result = lua_toboolean(L, -1);
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lua_pop(L, 1);
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return result;
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} else if (lua_isnil(L, -1)) {
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lua_pop(L, 1);
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return result;
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} else {
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lua_pop(L, 1);
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throw exception(sstream() << "field '" << opt_name << "' must be a Boolean in table at arg #" << idx);
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}
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} else if (idx <= lua_gettop(L) && !lua_isnil(L, idx)) {
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throw exception(sstream() << "arg #" << idx << " must be a table");
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} else {
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return def_value;
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}
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}
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int get_int_named_param(lua_State * L, int idx, char const * opt_name, int def_value) {
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if (lua_istable(L, idx)) {
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int result = def_value;
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push_string(L, opt_name);
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lua_gettable(L, idx);
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if (lua_isnumber(L, -1)) {
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result = lua_tointeger(L, -1);
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lua_pop(L, 1);
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return result;
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} else if (lua_isnil(L, -1)) {
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lua_pop(L, 1);
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return result;
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} else {
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lua_pop(L, 1);
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throw exception(sstream() << "field '" << opt_name << "' must be an integer in table at arg #" << idx);
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}
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} else if (idx <= lua_gettop(L) && !lua_isnil(L, idx)) {
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throw exception(sstream() << "arg #" << idx << " must be a table");
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} else {
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return def_value;
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}
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}
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unsigned get_uint_named_param(lua_State * L, int idx, char const * opt_name, unsigned def_value) {
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if (lua_istable(L, idx)) {
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push_string(L, opt_name);
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lua_gettable(L, idx);
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if (lua_isnumber(L, -1)) {
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long result = lua_tointeger(L, -1);
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lua_pop(L, 1);
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if (result < 0 || result > std::numeric_limits<unsigned>::max())
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throw exception(sstream() << "field '" << opt_name << "' must be a unsigned integer in table at arg #" << idx);
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return static_cast<unsigned>(result);
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} else if (lua_isnil(L, -1)) {
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lua_pop(L, 1);
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return static_cast<unsigned>(def_value);
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} else {
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lua_pop(L, 1);
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throw exception(sstream() << "field '" << opt_name << "' must be an integer in table at arg #" << idx);
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}
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} else if (idx <= lua_gettop(L) && !lua_isnil(L, idx)) {
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throw exception(sstream() << "arg #" << idx << " must be a table");
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} else {
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return def_value;
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}
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}
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}
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