繼上一篇windows下lua調用C++的想法,我那麼linux下也想折騰一下,看看他們之間有多大的差別,使用環境centos7 ,vscode,lua5.3.4版本 有這三樣就行了
extern "C" {
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
};
#include <iostream>
#include <vector>
#include <set>
using namespace std;
static const char* const ERROR_ARGUMENT_COUNT = "error param num!";
static const char* const ERROR_ARGUMENT_TYPE = "error param type!";
class Solution {
public:
vector<string> Permutation(string str, vector<string>&result) {
loc_Permutation(str, 0);
if (str.size() == 0)return result;
for (auto item : all_str){
result.push_back(item);
}
//result = all_str;
return result;
}
void loc_Permutation(string str, int loc){
all_str.insert(str);
//all_str.push_back(str);
//cout << str << endl;
int size = str.size();
if (loc == size - 1)return;
//loc_Permutation(str, loc + 1);
for (int idx_swap = loc; idx_swap < size; idx_swap++){
//cout << loc << " " << idx_swap << " ";
swap(str[loc], str[idx_swap]);
loc_Permutation(str, loc + 1);
swap(str[loc], str[idx_swap]);
}
}
public:
set<string> all_str;
};
void ErrorMsg(lua_State* L, const char* const pszErrorInfo)
{
lua_pushstring(L, pszErrorInfo);
lua_error(L);
}
// ��⺯�����ò��������Ƿ�����
void CheckParamCount(lua_State* L, int paramCount)
{
// lua_gettop��ȡջ��Ԫ�ظ���.
if (lua_gettop(L) != paramCount)
{
ErrorMsg(L, ERROR_ARGUMENT_COUNT);
}
}
//ȫ�����㷨
extern "C" int AllSort(lua_State* L)
{
// ��ȡ����.
const char* str= luaL_checkstring(L, 1);
if (str)
{
Solution sln;
vector<string> strResult;
strResult = sln.Permutation(str, strResult);
//lua_settop(L, 0);
lua_newtable(L);
lua_newtable(L);
int count = 1;
for (int i = 0; i < strResult.size();i++)
{
lua_pushstring(L, strResult[i].c_str());
//lua_setfield(L, -2, i);
lua_rawseti(L, -2, count++);
}
//Ƕ��school������������
lua_pushstring(L, "array");
lua_insert(L, -2); /* school table */
lua_settable(L, -3); /* param.school = school */
//return strResult.size();
}
else
{
ErrorMsg(L, ERROR_ARGUMENT_TYPE);
}
// ����ֵ����Ϊ0��.
return 1;
}
// ��ʾWindows�Ի���.
// @param [in] pszMessage string 1
// @param [in] pszCaption string 2
extern "C" int ShowMsgBox(lua_State* L)
{
const char* pszMessage = "hdc";
const char* pszCaption = "hdc";
// �����������Ƿ���ȷ.
CheckParamCount(L, 2);
// ��ȡ����.
pszMessage = luaL_checkstring(L, 1);
pszCaption = luaL_checkstring(L, 2);
if (pszCaption && pszMessage)
{
cout << "Hello world from clibs!" << endl;
lua_pushstring(L, "Hello world from clibs!");
}
else
{
ErrorMsg(L, ERROR_ARGUMENT_TYPE);
}
// ����ֵ����Ϊ0��.
return 1;
}
extern "C" int sub2(lua_State* L)
{
double op1 = luaL_checknumber(L, 1);
double op2 = luaL_checknumber(L, 2);
int temp = op1 - op2;
lua_pushnumber(L, temp);
return 1;
}
// ���������б�.
static luaL_Reg luaLibs[] =
{
{ "ShowMsgBox", ShowMsgBox },
{ "sub2", sub2 },
{ "AllSort", AllSort },
{ NULL, NULL }
};
// part two: DLL��ں�����Lua���ô�DLL����ں���.
extern "C"
int luaopen_WinFeature(lua_State* L) { //WinFeature��modole��, ����require�������
const char* const LIBRARY_NAME = "WinFeature"; //����ҲдWinFeature
//luaL_register(L, LIBRARY_NAME, luaLibs); //�ؼ�һ��, ��luaState��ע������lib
lua_newtable(L);
luaL_setfuncs(L, luaLibs,0);
return 1;
}
跟windows版本的區別在於
extern "C" __declspec(dllexport)
int luaopen_WinFeature(lua_State* L) { //WinFeature是modole名, 將來require這個名字
const char* const LIBRARY_NAME = "WinFeature"; //這裏也寫WinFeature
//luaL_register(L, LIBRARY_NAME, luaLibs); //關鍵一行, 在luaState上註冊好這個lib
lua_newtable(L);
luaL_setfuncs(L, luaLibs,0);
return 1;
}
這個函數__declspec(dllexport)這個linux下是不需要的,否則編譯不通過，C++代碼準備好了，那一般系統安裝的是5.1版本的lua，先升級到5.3.4，
wget http://www.lua.org/ftp/lua-5.3.4.tar.gz yum install libtermcap-devel ncurses-devel libevent-devel readline-devel -y tar -xzf lua-5.3.4.tar.gz cd lua-5.3.4 make linux test
編譯成功後,
rm -rf /usr/bin/lua
ln -s /home/hdc001/testLua/lua-5.3.4/src/lua /usr/bin/lua
lua -v
Lua 5.3.4 Copyright (C) 1994-2017 Lua.org, PUC-Rio
複製文件庫和頭文件到系統目錄
cp /home/hdc001/testLua/lua-5.3.4/src/liblua.a /usr/lib
cp /home/hdc001/testLua/lua-5.3.4/src/lua.h /usr/include
cp /home/hdc001/testLua/lua-5.3.4/src/lauxlib.h /usr/include
cp /home/hdc001/testLua/lua-5.3.4/src/lualib.h /usr/include
cp /home/hdc001/testLua/lua-5.3.4/src/luaconf.h /usr/include
接下來配置makefile文件
WinFeature.so : DllMain.cpp
g++ -g -Wall --shared -fPIC -llua DllMain.cpp -o WinFeature.so
clean :
rm *.so
main.lua文件
local WinFeature=require "WinFeature"
print(WinFeature.sub2(1,2));
local msg=WinFeature.AllSort("123456")
for i = 1, #msg.array do
print(msg.array[i])
end
print(msg);
lua main.lua命令運行，得到結果
順利運行，整個過程碰到一個坑怎麼都調用so出錯，後來才知道，一定要用g++編譯才行，gcc報錯的，這兩者區別可以谷歌一下。
工程示例下載地址https://download.csdn.net/download/huangdecai2/12400642