| 1 | #ifndef MTOOLS_LLONG_H
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| 2 | #define MTOOLS_LLONG_H
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| 3 |
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| 4 | #if 1
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| 5 |
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| 6 |
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| 7 | #ifdef HAVE_OFF_T_64
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| 8 | /* if off_t is already 64 bits, be happy, and don't worry about the
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| 9 | * loff_t and llseek stuff */
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| 10 | #define MT_OFF_T off_t
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| 11 | #endif
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| 12 |
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| 13 | #ifndef MT_OFF_T
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| 14 | # ifdef HAVE_LLSEEK
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| 15 | /* we have llseek. Now, what's its type called? loff_t or offset_t ? */
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| 16 | # ifdef HAVE_LOFF_T
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| 17 | # define MT_OFF_T loff_t
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| 18 | # else
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| 19 | # ifdef HAVE_OFFSET_T
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| 20 | # define MT_OFF_T offset_t
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| 21 | # endif
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| 22 | # endif
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| 23 | # endif
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| 24 | #endif
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| 25 |
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| 26 | #ifndef MT_OFF_T
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| 27 | /* we still don't have a suitable mt_off_t type...*/
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| 28 | # ifdef HAVE_LONG_LONG
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| 29 | /* ... first try long long ... */
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| 30 | # define MT_OFF_T long long
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| 31 | # else
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| 32 | /* ... and if that fails, fall back on good ole' off_t */
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| 33 | # define MT_OFF_T off_t
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| 34 | # endif
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| 35 | #endif
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| 36 |
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| 37 | typedef MT_OFF_T mt_off_t;
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| 38 |
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| 39 | #else
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| 40 | /* testing: meant to flag dubious assignments between 32 bit length types
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| 41 | * and 64 bit ones */
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| 42 | typedef struct {
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| 43 | int lo;
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| 44 | int high;
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| 45 | } *mt_off_t;
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| 46 |
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| 47 |
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| 48 | #endif
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| 49 |
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| 50 | typedef mt_off_t mt_size_t;
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| 51 |
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| 52 | #define min(a,b) ((a) < (b) ? (a) : (b))
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| 53 | #define MAX_OFF_T_B(bits) \
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| 54 | (((mt_off_t) 1 << min(bits, sizeof(mt_off_t)*8 - 1)) - 1)
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| 55 |
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| 56 | #ifdef HAVE_LLSEEK
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| 57 | # define SEEK_BITS 63
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| 58 | #else
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| 59 | # define SEEK_BITS (sizeof(off_t) * 8 - 1)
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| 60 | #endif
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| 61 |
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| 62 | extern const mt_off_t max_off_t_31;
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| 63 | extern const mt_off_t max_off_t_41;
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| 64 | extern const mt_off_t max_off_t_seek;
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| 65 |
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| 66 | extern off_t truncBytes32(mt_off_t off);
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| 67 | mt_off_t sectorsToBytes(Stream_t *This, off_t off);
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| 68 |
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| 69 | mt_size_t getfree(Stream_t *Stream);
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| 70 | int getfreeMinBytes(Stream_t *Stream, mt_size_t ref);
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| 71 |
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| 72 | Stream_t *find_device(char *drive, int mode, struct device *out_dev,
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| 73 | struct bootsector *boot,
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| 74 | char *name, int *media, mt_size_t *maxSize);
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| 75 |
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| 76 | int mt_lseek(int fd, mt_off_t where, int whence);
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| 77 |
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| 78 |
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| 79 | int log_2(int);
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| 80 |
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| 81 | #endif
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