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/*
** $Id: lzio.h,v 1.1 2004/03/16 21:58:30 niemeyer 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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