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https://github.com/lua/lua
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51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
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** $Id: lzio.h,v 1.5 1999/08/16 20:52:00 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 <stdio.h>
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/* For Lua only */
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#define zFopen luaZ_Fopen
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#define zsopen luaZ_sopen
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#define zmopen luaZ_mopen
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#define zread luaZ_read
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#define EOZ (-1) /* end of stream */
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typedef struct zio ZIO;
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ZIO* zFopen (ZIO* z, FILE* f, const char *name); /* open FILEs */
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ZIO* zsopen (ZIO* z, const char* s, const char *name); /* string */
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ZIO* zmopen (ZIO* z, const char* b, size_t size, const char *name); /* memory */
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size_t zread (ZIO* z, void* b, size_t n); /* read next n bytes */
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#define zgetc(z) (((z)->n--)>0 ? ((int)*(z)->p++): (z)->filbuf(z))
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#define zungetc(z) (++(z)->n,--(z)->p)
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#define zname(z) ((z)->name)
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/* --------- Private Part ------------------ */
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#define ZBSIZE 256 /* buffer size */
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struct zio {
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size_t n; /* bytes still unread */
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const unsigned char* p; /* current position in buffer */
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int (*filbuf)(ZIO* z);
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void* u; /* additional data */
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const char *name;
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unsigned char buffer[ZBSIZE]; /* buffer */
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};
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#endif
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