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comparison src/lua/lzio.h @ 11:27763b933818

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raise lua sources up one level
author Robert McIntyre <rlm@mit.edu>
date Sat, 03 Mar 2012 11:07:39 -0600
parents src/lua/src/lzio.h@f9f4f1b99eed
children
comparison
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10:48b74a4e4692 11:27763b933818
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