?login_element?

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  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
  68.