/*** $Id: lzio.h,v 1.30 2014/12/19 17:26:14 roberto Exp $** Buffered streams** See Copyright Notice in lua.h*/  #ifndef lzio_h#define lzio_h #include "lua.h" #include "lmem.h"  #define EOZ	(-1)			/* end of stream */ typedef struct Zio ZIO; #define zgetc(z)  (((z)->n--)>0 ?  cast_uchar(*(z)->p++) : luaZ_fill(z))  typedef struct Mbuffer {  char *buffer;  size_t n;  size_t buffsize;} Mbuffer; #define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0) #define luaZ_buffer(buff)	((buff)->buffer)#define luaZ_sizebuffer(buff)	((buff)->buffsize)#define luaZ_bufflen(buff)	((buff)->n) #define luaZ_buffremove(buff,i)	((buff)->n -= (i))#define luaZ_resetbuffer(buff) ((buff)->n = 0)  #define luaZ_resizebuffer(L, buff, size) \	((buff)->buffer = luaM_reallocvchar(L, (buff)->buffer, \				(buff)->buffsize, size), \	(buff)->buffsize = size) #define luaZ_freebuffer(L, buff)	luaZ_resizebuffer(L, buff, 0)  LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,                                        void *data);LUAI_FUNC size_t luaZ_read (ZIO* z, void *b, size_t n);	/* read next n bytes */   /* --------- Private Part ------------------ */ struct Zio {  size_t n;			/* bytes still unread */  const char *p;		/* current position in buffer */  lua_Reader reader;		/* reader function */  void *data;			/* additional data */  lua_State *L;			/* Lua state (for reader) */};  LUAI_FUNC int luaZ_fill (ZIO *z); #endif