在C/C++项目中接入LuaSQLite3

首先需要



这3个文件，lsqlite3.c下载地址：

这里写链接内容

sqlite3.c和sqlite3.h下载地址：

这里写链接内容

将这3个文件导入到项目中，并增加一个头文件lsqlite3.h，

//
//  lsqlite3.h
//  LuaAndCpp
//

#ifndef lsqlite3_h
#define lsqlite3_h

int luaopen_lsqlite3(lua_State* L);

#endif /* lsqlite3_h */

将sqlite3注册到Lua中：

//
//  main.cpp
//  LuaAndCpp
//

#include <iostream>

#include "lua.hpp"

#if __cplusplus
extern "C"{
#endif

#include "lsqlite3.h"

static luaL_Reg lua_sqlite3Lib[] = {
{"lsqlite3",luaopen_lsqlite3},
{NULL,NULL}
};

#if __cplusplus
}
#endif

int main(int argc, const char * argv[]) {
// insert code here...
std::cout << "Hello, World!\n";

lua_State* m_luaState = luaL_newstate();

luaL_openlibs(m_luaState);

luaL_Reg* lib = lua_sqlite3Lib;

lua_getglobal(m_luaState, "package");
lua_getfield(m_luaState, -1, "preload");

for (; lib->func; lib++) {
lua_pushcfunction(m_luaState, lib->func);
lua_setfield(m_luaState, -2, lib->name);
}
lua_pop(m_luaState, 2);

luaL_dofile(m_luaState, "/Users/Forest/Documents/LuaAndCpp/LuaAndCpp/scripts/DataBase.lua");

lua_close(m_luaState);

return 0;
}

在DataBase.lua中：

local sqlite3 = require "lsqlite3"

print('--->>',sqlite3)

结果

--->>    table: 0x100400cf0

验证是否能创建数据库：

local sq = {}

local sqlite3 = require "lsqlite3"

local db = nil

-- print('--->>',sqlite3)
sq.create_db = function ( path , name )
path = path..name
db = sqlite3.open(path)
end

local path = "/Users/Forest/Documents/LuaAndCpp/LuaAndCpp/"

sq.create_db(path,"config")

return sq

运行之后在指定目录下创建了config



完善对config数据库的操作

local sq = {}

local sqlite3 = require "lsqlite3"

local db = nil

-- 创建数据库
sq.create_db = function ( path , name )
path = path..name
db = sqlite3.open(path)
end

-- 创建表
sq.create_table = function ( table_name )
local str = 'create table '..table_name..' (id integer primary key , content);'
db:exec(str)
end

-- 增
sq.insert_info = function ( table_name , key , value )
local str = 'insert into '..table_name..' values('..key..','..'\"'..value..'\"'..');'
print(str)
db:exec(str)
end

-- 查找
sq.select = function ( table_name )
local str = 'select * from '..table_name
local tab = {}

for row in db:nrows(str) do
print(row.id,row.content)
-- tab[row.id] = row.content
if row.id == 1 then
row.content = "rotation"
end
local index = tonumber(row.id)
local content = tostring(row.content)
table.insert(tab , content)
end

for k,v in pairs(tab) do
print(k,v)
end

return tab
end

-- 删除
sq.delete = function ( table_name )
local str = 'delete from '..table_name
db:exec(str)
end

local path = "/Users/Forest/Documents/LuaAndCpp/LuaAndCpp/"

sq.create_db(path,"config")

-- 创建 sceneInfo 表
sq.create_table('sceneInfo')

sq.insert_info('sceneInfo', 1280, "width")
sq.insert_info('sceneInfo', 720,  "height")
sq.insert_info('sceneInfo', 1, "scale")

sq.select('sceneInfo')

return sq

运行结果

Hello, World!
insert into sceneInfo values(1280,"width");
insert into sceneInfo values(720,"height");
insert into sceneInfo values(1,"scale");
1   scale
720 height
1280    width
1   rotation
2   height
3   width
Program ended with exit code: 0

通过终端验证

ForestdeMBP:LuaAndCpp Forest$ sqlite3 config
SQLite version 3.8.10.2 2015-05-20 18:17:19
Enter ".help" for usage hints.
sqlite> .tables
sceneInfo
sqlite> .schema
CREATE TABLE sceneInfo (id integer primary key , content);
sqlite> select * from sceneInfo;
1|scale
720|height
1280|width
sqlite> .mode line
sqlite> select * from sceneInfo;
id = 1
content = scale

id = 720
content = height

id = 1280
content = width
sqlite> .mode column
sqlite> select * from sceneInfo;
1           scale
720         height
1280        width
sqlite> .headers on
sqlite> select * from sceneInfo;
id          content
----------  ----------
1           scale
720         height
1280        width
sqlite>