mirror of
https://github.com/lua/lua
synced 2024-11-22 21:01:26 +03:00
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
/*
|
|
** $Id: lzio.h,v 1.18 2003/08/28 14:38:46 roberto Exp roberto $
|
|
** 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))
|
|
|
|
void luaZ_init (lua_State *L, ZIO *z, lua_Chunkreader reader, void *data);
|
|
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 n;
|
|
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_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)
|
|
|
|
|
|
|
|
/* --------- Private Part ------------------ */
|
|
|
|
struct Zio {
|
|
size_t n; /* bytes still unread */
|
|
const char *p; /* current position in buffer */
|
|
lua_Chunkreader reader;
|
|
void* data; /* additional data */
|
|
lua_State *L; /* Lua state (for reader) */
|
|
};
|
|
|
|
|
|
int luaZ_fill (ZIO *z);
|
|
|
|
#endif
|