[1803] | 1 | /* |
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| 2 | ** $Id: lzio.h,v 1.15 2003/03/20 16:00:56 roberto Exp $ |
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| 3 | ** Buffered streams |
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| 4 | ** See Copyright Notice in lua.h |
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| 5 | */ |
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| 6 | |
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| 7 | |
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| 8 | #ifndef lzio_h |
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| 9 | #define lzio_h |
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| 10 | |
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| 11 | #include "lua.h" |
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| 12 | |
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| 13 | |
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| 14 | #define EOZ (-1) /* end of stream */ |
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| 15 | |
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| 16 | typedef struct Zio ZIO; |
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| 17 | |
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| 18 | |
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| 19 | #define char2int(c) cast(int, cast(unsigned char, (c))) |
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| 20 | |
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| 21 | #define zgetc(z) (((z)->n--)>0 ? char2int(*(z)->p++) : luaZ_fill(z)) |
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| 22 | |
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| 23 | #define zname(z) ((z)->name) |
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| 24 | |
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| 25 | void luaZ_init (ZIO *z, lua_Chunkreader reader, void *data, const char *name); |
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| 26 | size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */ |
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| 27 | int luaZ_lookahead (ZIO *z); |
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| 28 | |
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| 29 | |
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| 30 | |
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| 31 | typedef struct Mbuffer { |
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| 32 | char *buffer; |
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| 33 | size_t buffsize; |
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| 34 | } Mbuffer; |
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| 35 | |
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| 36 | |
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| 37 | char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n); |
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| 38 | |
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| 39 | #define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0) |
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| 40 | |
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| 41 | #define luaZ_sizebuffer(buff) ((buff)->buffsize) |
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| 42 | #define luaZ_buffer(buff) ((buff)->buffer) |
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| 43 | |
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| 44 | #define luaZ_resizebuffer(L, buff, size) \ |
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| 45 | (luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \ |
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| 46 | (buff)->buffsize = size) |
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| 47 | |
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| 48 | #define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0) |
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| 49 | |
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| 50 | |
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| 51 | /* --------- Private Part ------------------ */ |
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| 52 | |
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| 53 | struct Zio { |
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| 54 | size_t n; /* bytes still unread */ |
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| 55 | const char *p; /* current position in buffer */ |
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| 56 | lua_Chunkreader reader; |
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| 57 | void* data; /* additional data */ |
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| 58 | const char *name; |
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| 59 | }; |
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| 60 | |
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| 61 | |
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| 62 | int luaZ_fill (ZIO *z); |
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| 63 | |
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| 64 | #endif |
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