+
−/*
+
−** $Id: lzio.h,v 1.21.1.1 2007/12/27 13:02:25 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