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Commit | Line | Data |
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ba8b5c17 | 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 |