/*** $Id: lzio.h,v 1.21 2005/05/17 19:49:15 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 char2int(c)	cast(int, cast(unsigned char, (c)))#define zgetc(z)  (((z)->n--)>0 ?  char2int(*(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_resetbuffer(buff) ((buff)->n = 0)#define luaZ_resizebuffer(L, buff, size) \	(luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \	(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 */LUAI_FUNC int luaZ_lookahead (ZIO *z);/* --------- Private Part ------------------ */struct Zio {  size_t n;			/* bytes still unread */  const char *p;		/* current position in buffer */  lua_Reader reader;  void* data;			/* additional data */  lua_State *L;			/* Lua state (for reader) */};LUAI_FUNC int luaZ_fill (ZIO *z);#endif