ref: a4d34b295bef512c4d523d0e30cb9fe30d040299
dir: /lzio.h/
/* ** $Id: lzio.h $ ** Buffered streams ** See Copyright Notice in lua.h */ #ifndef lzio_h #define lzio_h #include "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_buffremove(buff,i) ((buff)->n -= (i)) #define luaZ_resetbuffer(buff) ((buff)->n = 0) #define luaZ_resizebuffer(L, buff, size) \ ((buff)->buffer = luaM_reallocvchar(L, (buff)->buffer, \ (buff)->buffsize, size), \ (buff)->buffsize = size) #define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0) 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