1323530Savg/* 2323530Savg** $Id: lzio.h,v 1.26.1.1 2013/04/12 18:48:47 roberto Exp $ 3323530Savg** Buffered streams 4323530Savg** See Copyright Notice in lua.h 5323530Savg*/ 6323530Savg 7323530Savg 8323530Savg#ifndef lzio_h 9323530Savg#define lzio_h 10323530Savg 11323530Savg#include "lua.h" 12323530Savg 13323530Savg#include "lmem.h" 14323530Savg 15323530Savg 16323530Savg#define EOZ (-1) /* end of stream */ 17323530Savg 18323530Savgtypedef struct Zio ZIO; 19323530Savg 20323530Savg#define zgetc(z) (((z)->n--)>0 ? cast_uchar(*(z)->p++) : luaZ_fill(z)) 21323530Savg 22323530Savg 23323530Savgtypedef struct Mbuffer { 24323530Savg char *buffer; 25323530Savg size_t n; 26323530Savg size_t buffsize; 27323530Savg} Mbuffer; 28323530Savg 29323530Savg#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0) 30323530Savg 31323530Savg#define luaZ_buffer(buff) ((buff)->buffer) 32323530Savg#define luaZ_sizebuffer(buff) ((buff)->buffsize) 33323530Savg#define luaZ_bufflen(buff) ((buff)->n) 34323530Savg 35323530Savg#define luaZ_resetbuffer(buff) ((buff)->n = 0) 36323530Savg 37323530Savg 38323530Savg#define luaZ_resizebuffer(L, buff, size) \ 39323530Savg (luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \ 40323530Savg (buff)->buffsize = size) 41323530Savg 42323530Savg#define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0) 43323530Savg 44323530Savg 45323530SavgLUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n); 46323530SavgLUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, 47323530Savg void *data); 48323530SavgLUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */ 49323530Savg 50323530Savg 51323530Savg 52323530Savg/* --------- Private Part ------------------ */ 53323530Savg 54323530Savgstruct Zio { 55323530Savg size_t n; /* bytes still unread */ 56323530Savg const char *p; /* current position in buffer */ 57323530Savg lua_Reader reader; /* reader function */ 58323530Savg void* data; /* additional data */ 59323530Savg lua_State *L; /* Lua state (for reader) */ 60323530Savg}; 61323530Savg 62323530Savg 63323530SavgLUAI_FUNC int luaZ_fill (ZIO *z); 64323530Savg 65323530Savg#endif 66