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https://github.com/lua/lua
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063d4e4543
This is the first commit for the branch Lua 5.3. All source files were copied from the official distribution of 5.3.5 in the Lua site. The test files are the same of 5.3.4. The manual came from the previous RCS repository, revision 1.167.1.2.
67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
/*
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** $Id: lzio.h,v 1.31.1.1 2017/04/19 17:20:42 roberto Exp $
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** Buffered streams
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** See Copyright Notice in lua.h
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*/
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#ifndef lzio_h
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#define lzio_h
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#include "lua.h"
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#include "lmem.h"
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#define EOZ (-1) /* end of stream */
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typedef struct Zio ZIO;
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#define zgetc(z) (((z)->n--)>0 ? cast_uchar(*(z)->p++) : luaZ_fill(z))
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typedef struct Mbuffer {
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char *buffer;
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size_t n;
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size_t buffsize;
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} Mbuffer;
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#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)
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#define luaZ_buffer(buff) ((buff)->buffer)
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#define luaZ_sizebuffer(buff) ((buff)->buffsize)
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#define luaZ_bufflen(buff) ((buff)->n)
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#define luaZ_buffremove(buff,i) ((buff)->n -= (i))
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#define luaZ_resetbuffer(buff) ((buff)->n = 0)
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#define luaZ_resizebuffer(L, buff, size) \
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((buff)->buffer = luaM_reallocvchar(L, (buff)->buffer, \
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(buff)->buffsize, size), \
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(buff)->buffsize = size)
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#define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0)
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LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
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void *data);
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LUAI_FUNC size_t luaZ_read (ZIO* z, void *b, size_t n); /* read next n bytes */
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/* --------- Private Part ------------------ */
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struct Zio {
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size_t n; /* bytes still unread */
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const char *p; /* current position in buffer */
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lua_Reader reader; /* reader function */
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void *data; /* additional data */
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lua_State *L; /* Lua state (for reader) */
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};
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LUAI_FUNC int luaZ_fill (ZIO *z);
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#endif
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