Mercurial > vba-linux

     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
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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