FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/module/lua/lzio.h

     /*
     ** $Id: lzio.h,v 1.26.1.1 2013/04/12 18:48:47 roberto Exp $
     ** Buffered streams
     ** See Copyright Notice in lua.h
     */
     
     
     #ifndef lzio_h
     #define lzio_h
    
    #include <sys/lua/lua.h>
    
    #include "lmem.h"
    
    
    #define EOZ     (-1)                    /* end of stream */
    
    typedef struct Zio ZIO;
    
    #define zgetc(z)  (((z)->n--)>0 ?  cast_uchar(*(z)->p++) : luaZ_fill(z))
    
    
    typedef struct Mbuffer {
      char *buffer;
      size_t n;
      size_t buffsize;
    } Mbuffer;
    
    #define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)
    
    #define luaZ_buffer(buff)       ((buff)->buffer)
    #define luaZ_sizebuffer(buff)   ((buff)->buffsize)
    #define luaZ_bufflen(buff)      ((buff)->n)
    
    #define luaZ_resetbuffer(buff) ((buff)->n = 0)
    
    
    #define luaZ_resizebuffer(L, buff, size) \
            (luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \
            (buff)->buffsize = size)
    
    #define luaZ_freebuffer(L, buff)        luaZ_resizebuffer(L, buff, 0)
    
    
    LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
    LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
                                            void *data);
    LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */
    
    
    
    /* --------- Private Part ------------------ */
    
    struct Zio {
      size_t n;                     /* bytes still unread */
      const char *p;                /* current position in buffer */
      lua_Reader reader;            /* reader function */
      void* data;                   /* additional data */
      lua_State *L;                 /* Lua state (for reader) */
    };
    
    
    LUAI_FUNC int luaZ_fill (ZIO *z);
    
    #endif

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