Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
5205 | clevermous | 1 | /* |
2 | ** $Id: lzio.h,v 1.26 2011/07/15 12:48:03 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 zgetc(z) (((z)->n--)>0 ? cast_uchar(*(z)->p++) : luaZ_fill(z)) |
||
21 | |||
22 | |||
23 | typedef struct Mbuffer { |
||
24 | char *buffer; |
||
25 | size_t n; |
||
26 | size_t buffsize; |
||
27 | } Mbuffer; |
||
28 | |||
29 | #define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0) |
||
30 | |||
31 | #define luaZ_buffer(buff) ((buff)->buffer) |
||
32 | #define luaZ_sizebuffer(buff) ((buff)->buffsize) |
||
33 | #define luaZ_bufflen(buff) ((buff)->n) |
||
34 | |||
35 | #define luaZ_resetbuffer(buff) ((buff)->n = 0) |
||
36 | |||
37 | |||
38 | #define luaZ_resizebuffer(L, buff, size) \ |
||
39 | (luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \ |
||
40 | (buff)->buffsize = size) |
||
41 | |||
42 | #define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0) |
||
43 | |||
44 | |||
45 | LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n); |
||
46 | LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, |
||
47 | void *data); |
||
48 | LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */ |
||
49 | |||
50 | |||
51 | |||
52 | /* --------- Private Part ------------------ */ |
||
53 | |||
54 | struct Zio { |
||
55 | size_t n; /* bytes still unread */ |
||
56 | const char *p; /* current position in buffer */ |
||
57 | lua_Reader reader; /* reader function */ |
||
58 | void* data; /* additional data */ |
||
59 | lua_State *L; /* Lua state (for reader) */ |
||
60 | }; |
||
61 | |||
62 | |||
63 | LUAI_FUNC int luaZ_fill (ZIO *z); |
||
64 | |||
65 | #endif |