2812
|
1 |
/*
|
|
2 |
** $Id: lzio.h,v 1.21.1.1 2007/12/27 13:02:25 roberto Exp $
|
|
3 |
** Buffered streams
|
|
4 |
** See Copyright Notice in lua.h
|
|
5 |
*/
|
|
6 |
|
|
7 |
|
|
8 |
#ifndef lzio_h
|
|
9 |
#define lzio_h
|
|
10 |
|
|
11 |
#include "lua.h"
|
|
12 |
|
|
13 |
#include "lmem.h"
|
|
14 |
|
|
15 |
|
|
16 |
#define EOZ (-1) /* end of stream */
|
|
17 |
|
|
18 |
typedef struct Zio ZIO;
|
|
19 |
|
|
20 |
#define char2int(c) cast(int, cast(unsigned char, (c)))
|
|
21 |
|
|
22 |
#define zgetc(z) (((z)->n--)>0 ? char2int(*(z)->p++) : luaZ_fill(z))
|
|
23 |
|
|
24 |
typedef struct Mbuffer {
|
|
25 |
char *buffer;
|
|
26 |
size_t n;
|
|
27 |
size_t buffsize;
|
|
28 |
} Mbuffer;
|
|
29 |
|
|
30 |
#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)
|
|
31 |
|
|
32 |
#define luaZ_buffer(buff) ((buff)->buffer)
|
|
33 |
#define luaZ_sizebuffer(buff) ((buff)->buffsize)
|
|
34 |
#define luaZ_bufflen(buff) ((buff)->n)
|
|
35 |
|
|
36 |
#define luaZ_resetbuffer(buff) ((buff)->n = 0)
|
|
37 |
|
|
38 |
|
|
39 |
#define luaZ_resizebuffer(L, buff, size) \
|
|
40 |
(luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \
|
|
41 |
(buff)->buffsize = size)
|
|
42 |
|
|
43 |
#define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0)
|
|
44 |
|
|
45 |
|
|
46 |
LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
|
|
47 |
LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
|
|
48 |
void *data);
|
|
49 |
LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */
|
|
50 |
LUAI_FUNC int luaZ_lookahead (ZIO *z);
|
|
51 |
|
|
52 |
|
|
53 |
|
|
54 |
/* --------- Private Part ------------------ */
|
|
55 |
|
|
56 |
struct Zio {
|
|
57 |
size_t n; /* bytes still unread */
|
|
58 |
const char *p; /* current position in buffer */
|
|
59 |
lua_Reader reader;
|
|
60 |
void* data; /* additional data */
|
|
61 |
lua_State *L; /* Lua state (for reader) */
|
|
62 |
};
|
|
63 |
|
|
64 |
|
|
65 |
LUAI_FUNC int luaZ_fill (ZIO *z);
|
|
66 |
|
|
67 |
#endif
|