​ 最近项目中需要使用JS引擎，在经历了V7引擎的正则表达式存在Bug、V8引擎实现多线程操作资源占用太大导致软件崩溃后，从网上找到Duktape引擎。Duktape 引擎对ECMAScript兼容性较好且项目比较活跃，授权协议为MIT。

引用Duktape

只需要将duktape.h、duktape.c 及duk_config.h 添加到VS工程即可。

定义导出类

class CLog{public:    CLog () {}    void Info(const char* msg) {        printf("[Info] %s\n", msg);    }    void Err(const char* msg) {        printf("[Err] %s\n", msg);    }    void Warn(const char* msg) {        printf("[Warn] %s\n", msg);    }    };

声明全局对象及操作函数

static CLog s_log;static duk_ret_t Info(duk_context *ctx) {    const char *msg = duk_safe_to_string(ctx, 0);    duk_push_current_function(ctx);    duk_get_prop_string(ctx, -1, "_ptr");    CLog *log = static_cast<CLog*>(duk_to_pointer(ctx, -1));    log->Info(msg);    duk_push_boolean(ctx, 1);    return 1;}static duk_ret_t Warn(duk_context *ctx) {    const char *msg = duk_safe_to_string(ctx, 0);    duk_push_current_function(ctx);    duk_get_prop_string(ctx, -1, "_ptr");    CLog *log = static_cast<CLog*>(duk_to_pointer(ctx, -1));    log->Warn(msg);    duk_push_boolean(ctx, 1);    return 1;}static duk_ret_t Err(duk_context *ctx) {    const char *msg = duk_safe_to_string(ctx, 0);    duk_push_current_function(ctx);    duk_get_prop_string(ctx, -1, "_ptr");    CLog *log = static_cast<CLog*>(duk_to_pointer(ctx, -1));    log->Err(msg);    duk_push_boolean(ctx, 1);    return 1;}static duk_ret_t GetMsg(duk_context *ctx) {    duk_push_string(ctx, "测试 Test");    return 1;}

声明导出对象函数

void AddLogObj(duk_context *ctx) {    struct {        const char      *name;        duk_c_function  fn;    } fnItems[] = {        {"Info"     , Info},        {"Warn"     , Warn},        {"Err"      , Err},        {"GetMsg"   , GetMsg}    };    duk_push_global_object(ctx);    duk_push_object(ctx);    size_t fnCnt = sizeof(fnItems)/sizeof(fnItems[0]);    for (size_t i = 0; i < fnCnt; ++i) {        duk_push_c_function(ctx, fnItems[i].fn, 1);        duk_push_pointer(ctx, &s_log);        duk_put_prop_string(ctx, -2, "_ptr");        duk_put_prop_string(ctx, -2, fnItems[i].name);    }    duk_put_prop_string(ctx, -2, "Log");}

程序入口函数

int main(int argc, char *argv[]) {    duk_context *ctx;    if (argc < 2) { exit(1);}    ctx = duk_create_heap_default();    if (!ctx) { exit(1);}    AddLogObj(ctx);    duk_eval_string(ctx, "print(Log.Info(123)); print(Log.GetMsg());");    duk_destroy_heap(ctx);        return 0;}

代码下载

http://download.csdn.net/detail/sdhongjun/9609026

参考资料

https://github.com/civetweb/civetweb/blob/master/src/mod_duktape.inl