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学校网站规划,seo优化顾问服务,wordpress 采集 公众号,网站运维可以做哪些相关头文件解释 lua.h:声明lua提供的基础函数,所有内容都有个前缀lua_; luaxlib.h:声明辅助库提供的函数,所有内容都有个前缀luaL_; lualib.h:声明了打开标准库的函数; 辅助库对…

相关头文件解释

lua.h:声明lua提供的基础函数,所有内容都有个前缀lua_;

luaxlib.h:声明辅助库提供的函数,所有内容都有个前缀luaL_;

lualib.h:声明了打开标准库的函数;

辅助库对lua.h声明的基础api进行了更高层次的抽象,基础库注重经济性和正交性,辅助库更追求常见任务的实用性。

辅助库不能直接访问lua的元素,都要通过lua.h提供的基础函数来访问。

辅助库能实现什么,开发者就能实现什么。

lua内核不会向任何输出流写数据,只会以返回错误信息的方式报错。

lua所有类型的定义

/*
** Union of all Lua values
*/
typedef union Value {struct GCObject *gc;    /* collectable objects */void *p;         /* light userdata */lua_CFunction f; /* light C functions */lua_Integer i;   /* integer numbers */lua_Number n;    /* float numbers *//* not used, but may avoid warnings for uninitialized value */lu_byte ub;
} Value;

状态机操作

/*
** state manipulation
*/
LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud);
LUA_API void       (lua_close) (lua_State *L);
LUA_API lua_State *(lua_newthread) (lua_State *L);
LUA_API int        (lua_closethread) (lua_State *L, lua_State *from);
LUA_API int        (lua_resetthread) (lua_State *L);  /* Deprecated! */LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf);LUA_API lua_Number (lua_version) (lua_State *L);

栈操作

/*
** basic stack manipulation
*/
LUA_API int   (lua_absindex) (lua_State *L, int idx);
LUA_API int   (lua_gettop) (lua_State *L);
LUA_API void  (lua_settop) (lua_State *L, int idx);
LUA_API void  (lua_pushvalue) (lua_State *L, int idx);
LUA_API void  (lua_rotate) (lua_State *L, int idx, int n);
LUA_API void  (lua_copy) (lua_State *L, int fromidx, int toidx);
LUA_API int   (lua_checkstack) (lua_State *L, int n);LUA_API void  (lua_xmove) (lua_State *from, lua_State *to, int n);

C语言访问栈/出栈操作

/*
** access functions (stack -> C)
*/LUA_API int             (lua_isnumber) (lua_State *L, int idx);
LUA_API int             (lua_isstring) (lua_State *L, int idx);
LUA_API int             (lua_iscfunction) (lua_State *L, int idx);
LUA_API int             (lua_isinteger) (lua_State *L, int idx);
LUA_API int             (lua_isuserdata) (lua_State *L, int idx);
LUA_API int             (lua_type) (lua_State *L, int idx);
LUA_API const char     *(lua_typename) (lua_State *L, int tp);LUA_API lua_Number      (lua_tonumberx) (lua_State *L, int idx, int *isnum);
LUA_API lua_Integer     (lua_tointegerx) (lua_State *L, int idx, int *isnum);
LUA_API int             (lua_toboolean) (lua_State *L, int idx);
LUA_API const char     *(lua_tolstring) (lua_State *L, int idx, size_t *len);
LUA_API lua_Unsigned    (lua_rawlen) (lua_State *L, int idx);
LUA_API lua_CFunction   (lua_tocfunction) (lua_State *L, int idx);
LUA_API void	       *(lua_touserdata) (lua_State *L, int idx);
LUA_API lua_State      *(lua_tothread) (lua_State *L, int idx);
LUA_API const void     *(lua_topointer) (lua_State *L, int idx);

C语言压栈操作

/*
** push functions (C -> stack)
*/
LUA_API void        (lua_pushnil) (lua_State *L);
LUA_API void        (lua_pushnumber) (lua_State *L, lua_Number n);
LUA_API void        (lua_pushinteger) (lua_State *L, lua_Integer n);
LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t len);
LUA_API const char *(lua_pushstring) (lua_State *L, const char *s);
LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,va_list argp);
LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...);
LUA_API void  (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n);
LUA_API void  (lua_pushboolean) (lua_State *L, int b);
LUA_API void  (lua_pushlightuserdata) (lua_State *L, void *p);
LUA_API int   (lua_pushthread) (lua_State *L);LUA_API void  (lua_clonefunction) (lua_State *L, const void * fp);
LUA_API void  (lua_sharefunction) (lua_State *L, int index);
LUA_API void  (lua_sharestring) (lua_State *L, int index);
LUA_API void  (lua_clonetable) (lua_State *L, const void * t);

C语言访问lua变量的操作(把lua变量放到栈里)

/*
** get functions (Lua -> stack)
*/
LUA_API int (lua_getglobal) (lua_State *L, const char *name);
LUA_API int (lua_gettable) (lua_State *L, int idx);
LUA_API int (lua_getfield) (lua_State *L, int idx, const char *k);
LUA_API int (lua_geti) (lua_State *L, int idx, lua_Integer n);
LUA_API int (lua_rawget) (lua_State *L, int idx);
LUA_API int (lua_rawgeti) (lua_State *L, int idx, lua_Integer n);
LUA_API int (lua_rawgetp) (lua_State *L, int idx, const void *p);LUA_API void  (lua_createtable) (lua_State *L, int narr, int nrec);
LUA_API void *(lua_newuserdatauv) (lua_State *L, size_t sz, int nuvalue);
LUA_API int   (lua_getmetatable) (lua_State *L, int objindex);
LUA_API int  (lua_getiuservalue) (lua_State *L, int idx, int n);

C语言修改lua变量

/*
** set functions (stack -> Lua)
*/
LUA_API void  (lua_setglobal) (lua_State *L, const char *name);
LUA_API void  (lua_settable) (lua_State *L, int idx);
LUA_API void  (lua_setfield) (lua_State *L, int idx, const char *k);
LUA_API void  (lua_seti) (lua_State *L, int idx, lua_Integer n);
LUA_API void  (lua_rawset) (lua_State *L, int idx);
LUA_API void  (lua_rawseti) (lua_State *L, int idx, lua_Integer n);
LUA_API void  (lua_rawsetp) (lua_State *L, int idx, const void *p);
LUA_API int   (lua_setmetatable) (lua_State *L, int objindex);
LUA_API int   (lua_setiuservalue) (lua_State *L, int idx, int n);

C语言运行lua函数

/*
** 'load' and 'call' functions (load and run Lua code)
*/
LUA_API void  (lua_callk) (lua_State *L, int nargs, int nresults,lua_KContext ctx, lua_KFunction k);
#define lua_call(L,n,r)		lua_callk(L, (n), (r), 0, NULL)LUA_API int   (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc,lua_KContext ctx, lua_KFunction k);
#define lua_pcall(L,n,r,f)	lua_pcallk(L, (n), (r), (f), 0, NULL)LUA_API int   (lua_load) (lua_State *L, lua_Reader reader, void *dt,const char *chunkname, const char *mode);LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data, int strip);

协程相关

/*
** coroutine functions
*/
LUA_API int  (lua_yieldk)     (lua_State *L, int nresults, lua_KContext ctx,lua_KFunction k);
LUA_API int  (lua_resume)     (lua_State *L, lua_State *from, int narg,int *nres);
LUA_API int  (lua_status)     (lua_State *L);
LUA_API int (lua_isyieldable) (lua_State *L);#define lua_yield(L,n)		lua_yieldk(L, (n), 0, NULL)

其他杂项


/*
** miscellaneous functions
*/LUA_API int   (lua_error) (lua_State *L);LUA_API int   (lua_next) (lua_State *L, int idx);LUA_API void  (lua_concat) (lua_State *L, int n);
LUA_API void  (lua_len)    (lua_State *L, int idx);LUA_API size_t   (lua_stringtonumber) (lua_State *L, const char *s);LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);LUA_API void (lua_toclose) (lua_State *L, int idx);
LUA_API void (lua_closeslot) (lua_State *L, int idx);

一些有用的宏定义

/*
** {==============================================================
** some useful macros
** ===============================================================
*/#define lua_getextraspace(L)	((void *)((char *)(L) - LUA_EXTRASPACE))#define lua_tonumber(L,i)	lua_tonumberx(L,(i),NULL)
#define lua_tointeger(L,i)	lua_tointegerx(L,(i),NULL)#define lua_pop(L,n)		lua_settop(L, -(n)-1)#define lua_newtable(L)		lua_createtable(L, 0, 0)#define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n)))#define lua_pushcfunction(L,f)	lua_pushcclosure(L, (f), 0)#define lua_isfunction(L,n)	(lua_type(L, (n)) == LUA_TFUNCTION)
#define lua_istable(L,n)	(lua_type(L, (n)) == LUA_TTABLE)
#define lua_islightuserdata(L,n)	(lua_type(L, (n)) == LUA_TLIGHTUSERDATA)
#define lua_isnil(L,n)		(lua_type(L, (n)) == LUA_TNIL)
#define lua_isboolean(L,n)	(lua_type(L, (n)) == LUA_TBOOLEAN)
#define lua_isthread(L,n)	(lua_type(L, (n)) == LUA_TTHREAD)
#define lua_isnone(L,n)		(lua_type(L, (n)) == LUA_TNONE)
#define lua_isnoneornil(L, n)	(lua_type(L, (n)) <= 0)#define lua_pushliteral(L, s)	lua_pushstring(L, "" s)#define lua_pushglobaltable(L)  \((void)lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS))#define lua_tostring(L,i)	lua_tolstring(L, (i), NULL)#define lua_insert(L,idx)	lua_rotate(L, (idx), 1)#define lua_remove(L,idx)	(lua_rotate(L, (idx), -1), lua_pop(L, 1))#define lua_replace(L,idx)	(lua_copy(L, -1, (idx)), lua_pop(L, 1))


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