2 ** $Id: lzio.h,v 1.21.1.1 2007/12/27 13:02:25 roberto Exp $
4 ** See Copyright Notice in lua.h
14 #define EOZ (-1) /* end of stream */
16 typedef struct Zio ZIO;
18 #define char2int(c) cast(int, cast(unsigned char, (c)))
20 #define zgetc(z) (((z)->n--)>0 ? char2int(*(z)->p++) : pdep_fill(z))
22 typedef struct Mbuffer {
28 #define pdep_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)
30 #define pdep_buffer(buff) ((buff)->buffer)
31 #define pdep_sizebuffer(buff) ((buff)->buffsize)
32 #define pdep_bufflen(buff) ((buff)->n)
34 #define pdep_resetbuffer(buff) ((buff)->n = 0)
37 #define pdep_resizebuffer(L, buff, size) \
38 (pdep_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \
39 (buff)->buffsize = size)
41 #define pdep_freebuffer(L, buff) pdep_resizebuffer(L, buff, 0)
44 LUAI_FUNC char *pdep_openspace (lua_State *L, Mbuffer *buff, size_t n);
45 LUAI_FUNC void pdep_init (lua_State *L, ZIO *z, lua_Reader reader,
47 LUAI_FUNC size_t pdep_read (ZIO* z, void* b, size_t n); /* read next n bytes */
48 LUAI_FUNC int pdep_lookahead (ZIO *z);
52 /* --------- Private Part ------------------ */
55 size_t n; /* bytes still unread */
56 const char *p; /* current position in buffer */
58 void* data; /* additional data */
59 lua_State *L; /* Lua state (for reader) */
63 LUAI_FUNC int pdep_fill (ZIO *z);