mirror of
https://github.com/lua/lua
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65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/*
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** $Id: lzio.h,v 1.14 2002/10/08 18:46:08 roberto Exp roberto $
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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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#define EOZ (-1) /* end of stream */
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typedef struct Zio ZIO;
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#define char2int(c) cast(int, cast(unsigned char, (c)))
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#define zgetc(z) (((z)->n--)>0 ? char2int(*(z)->p++) : luaZ_fill(z))
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#define zname(z) ((z)->name)
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void luaZ_init (ZIO *z, lua_Chunkreader reader, void *data, const char *name);
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size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */
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int luaZ_lookahead (ZIO *z);
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typedef struct Mbuffer {
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char *buffer;
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size_t buffsize;
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} Mbuffer;
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char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
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#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)
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#define luaZ_sizebuffer(buff) ((buff)->buffsize)
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#define luaZ_buffer(buff) ((buff)->buffer)
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#define luaZ_resizebuffer(L, buff, size) \
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(luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \
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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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/* --------- 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_Chunkreader reader;
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void* data; /* additional data */
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const char *name;
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};
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int luaZ_fill (ZIO *z);
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#endif
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