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| 6536 | serge | 1 | /* |
| 2 | * Copyright (c) 1990 The Regents of the University of California. |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms are permitted |
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| 6 | * provided that the above copyright notice and this paragraph are |
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| 7 | * duplicated in all such forms and that any documentation, |
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| 8 | * advertising materials, and other materials related to such |
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| 9 | * distribution and use acknowledge that the software was developed |
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| 10 | * by the University of California, Berkeley. The name of the |
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| 11 | * University may not be used to endorse or promote products derived |
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| 12 | * from this software without specific prior written permission. |
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| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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| 15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 16 | */ |
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| 17 | |||
| 18 | /* |
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| 19 | FUNCTION |
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| 20 | < |
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| 21 | |||
| 22 | INDEX |
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| 23 | fgetpos |
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| 24 | INDEX |
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| 25 | _fgetpos_r |
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| 26 | |||
| 27 | ANSI_SYNOPSIS |
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| 28 | #include |
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| 29 | int fgetpos(FILE *restrict <[fp]>, fpos_t *restrict <[pos]>); |
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| 30 | int _fgetpos_r(struct _reent *<[ptr]>, FILE *restrict <[fp]>, fpos_t *restrict <[pos]>); |
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| 31 | |||
| 32 | TRAD_SYNOPSIS |
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| 33 | #include |
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| 34 | int fgetpos(<[fp]>, <[pos]>) |
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| 35 | FILE *<[fp]>; |
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| 36 | fpos_t *<[pos]>; |
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| 37 | |||
| 38 | int _fgetpos_r(<[ptr]>, <[fp]>, <[pos]>) |
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| 39 | struct _reent *<[ptr]>; |
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| 40 | FILE *<[fp]>; |
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| 41 | fpos_t *<[pos]>; |
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| 42 | |||
| 43 | DESCRIPTION |
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| 44 | Objects of type < |
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| 45 | of the file your program has already read. Many of the < |
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| 46 | depend on this position, and many change it as a side effect. |
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| 47 | |||
| 48 | You can use < |
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| 49 | identified by <[fp]>; < |
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| 50 | representing that position at <<*<[pos]>>>. Later, you can |
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| 51 | use this value with < |
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| 52 | position. |
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| 53 | |||
| 54 | In the current implementation, < |
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| 55 | count to represent the file position; this is the same number that |
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| 56 | would be returned by < |
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| 57 | |||
| 58 | RETURNS |
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| 59 | < |
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| 60 | result is <<1>>. Failure occurs on streams that do not support |
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| 61 | positioning; the global < |
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| 62 | value < |
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| 63 | |||
| 64 | PORTABILITY |
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| 65 | < |
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| 66 | value it records is not specified beyond requiring that it be |
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| 67 | acceptable as an argument to < |
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| 68 | conforming C implementations may return a different result from |
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| 69 | < |
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| 70 | |||
| 71 | No supporting OS subroutines are required. |
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| 72 | */ |
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| 73 | |||
| 74 | #include <_ansi.h> |
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| 75 | #include |
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| 76 | #include |
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| 77 | |||
| 78 | int |
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| 79 | _DEFUN(_fgetpos_r, (ptr, fp, pos), |
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| 80 | struct _reent * ptr _AND |
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| 81 | FILE *__restrict fp _AND |
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| 82 | _fpos_t *__restrict pos) |
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| 83 | { |
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| 84 | *pos = _ftell_r (ptr, fp); |
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| 85 | |||
| 86 | if (*pos != -1) |
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| 87 | { |
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| 88 | return 0; |
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| 89 | } |
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| 90 | return 1; |
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| 91 | } |
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| 92 | |||
| 93 | #ifndef _REENT_ONLY |
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| 94 | |||
| 95 | int |
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| 96 | _DEFUN(fgetpos, (fp, pos), |
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| 97 | FILE *__restrict fp _AND |
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| 98 | _fpos_t *__restrict pos) |
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| 99 | { |
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| 100 | return _fgetpos_r (_REENT, fp, pos); |
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| 101 | } |
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| 102 | |||
| 103 | #endif /* !_REENT_ONLY */ |