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Integrating Lua into C++

, 2 Sep 2005
An article about embedding the Lua scripting language with C++ objects.
/*
** $Id: lzio.h,v 1.15 2003/03/20 16:00:56 roberto Exp $
** Buffered streams
** See Copyright Notice in lua.h
*/


#ifndef lzio_h
#define lzio_h

#include "lua.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))

#define zname(z)	((z)->name)

void luaZ_init (ZIO *z, lua_Chunkreader reader, void *data, const char *name);
size_t luaZ_read (ZIO* z, void* b, size_t n);	/* read next n bytes */
int luaZ_lookahead (ZIO *z);



typedef struct Mbuffer {
  char *buffer;
  size_t buffsize;
} Mbuffer;


char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);

#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)

#define luaZ_sizebuffer(buff)	((buff)->buffsize)
#define luaZ_buffer(buff)	((buff)->buffer)

#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)


/* --------- Private Part ------------------ */

struct Zio {
  size_t n;			/* bytes still unread */
  const char *p;		/* current position in buffer */
  lua_Chunkreader reader;
  void* data;			/* additional data */
  const char *name;
};


int luaZ_fill (ZIO *z);

#endif

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

RichardS
Software Developer (Senior)
South Africa South Africa
No Biography provided

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