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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4973 | right-hear | 1 | /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */ |
| 2 | #include |
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| 3 | #include |
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| 4 | #include |
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| 5 | #include |
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| 6 | #include |
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| 7 | #include |
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| 8 | #include |
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| 9 | |||
| 10 | int _filbuf(FILE *f) |
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| 11 | { |
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| 12 | int size; |
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| 13 | char c; |
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| 14 | |||
| 15 | if (f->_flag & _IORW) |
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| 16 | f->_flag |= _IOREAD; |
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| 17 | |||
| 18 | if ((f->_flag&_IOREAD) == 0) |
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| 19 | return EOF; |
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| 20 | if (f->_flag&(_IOSTRG|_IOEOF)) |
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| 21 | return EOF; |
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| 22 | tryagain: |
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| 23 | if (f->_base==NULL) { |
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| 24 | if (f->_flag&_IONBF) { |
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| 25 | f->_base = &c; |
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| 26 | goto tryagain; |
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| 27 | } |
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| 28 | size = 512; |
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| 29 | if ((f->_base = malloc(size)) == NULL) { |
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| 30 | f->_flag |= _IONBF; |
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| 31 | goto tryagain; |
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| 32 | } |
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| 33 | f->_flag |= _IOMYBUF; |
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| 34 | f->_bufsiz = size; |
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| 35 | } |
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| 36 | if (f == stdin) { |
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| 37 | if (stdout->_flag&_IOLBF) |
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| 38 | fflush(stdout); |
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| 39 | if (stderr->_flag&_IOLBF) |
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| 40 | fflush(stderr); |
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| 41 | } |
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| 42 | if(f->std_ops && STM_OP(f,read)) |
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| 43 | { |
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| 44 | f->_cnt=STM_OP(f,read)(f,f->_base,f->_flag & _IONBF ? 1 : f->_bufsiz); |
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| 45 | } else { |
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| 46 | f->_cnt = read(fileno(f), f->_base,f->_flag & _IONBF ? 1 : f->_bufsiz); |
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| 47 | } |
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| 48 | f->_ptr = f->_base; |
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| 49 | if (f->_flag & _IONBF && f->_base == &c) |
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| 50 | f->_base = NULL; |
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| 51 | if (--f->_cnt < 0) { |
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| 52 | if (f->_cnt == -1) { |
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| 53 | f->_flag |= _IOEOF; |
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| 54 | if (f->_flag & _IORW) |
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| 55 | f->_flag &= ~_IOREAD; |
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| 56 | } else |
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| 57 | f->_flag |= _IOERR; |
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| 58 | f->_cnt = 0; |
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| 59 | return EOF; |
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| 60 | } |
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| 61 | return *f->_ptr++ & 0377; |
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| 62 | } |