| 1 | /* |
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| 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 | |
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| 18 | /* |
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| 19 | FUNCTION |
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| 20 | <<rewind>>---reinitialize a file or stream |
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| 21 | |
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| 22 | INDEX |
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| 23 | rewind |
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| 24 | INDEX |
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| 25 | _rewind_r |
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| 26 | |
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| 27 | SYNOPSIS |
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| 28 | #include <stdio.h> |
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| 29 | void rewind(FILE *<[fp]>); |
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| 30 | void _rewind_r(struct _reent *<[ptr]>, FILE *<[fp]>); |
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| 31 | |
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| 32 | DESCRIPTION |
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| 33 | <<rewind>> returns the file position indicator (if any) for the file |
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| 34 | or stream identified by <[fp]> to the beginning of the file. It also |
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| 35 | clears any error indicator and flushes any pending output. |
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| 36 | |
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| 37 | RETURNS |
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| 38 | <<rewind>> does not return a result. |
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| 39 | |
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| 40 | PORTABILITY |
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| 41 | ANSI C requires <<rewind>>. |
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| 42 | |
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| 43 | No supporting OS subroutines are required. |
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| 44 | */ |
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| 45 | |
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| 46 | #if defined(LIBC_SCCS) && !defined(lint) |
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| 47 | static char sccsid[] = "%W% (Berkeley) %G%"; |
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| 48 | #endif /* LIBC_SCCS and not lint */ |
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| 49 | |
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| 50 | #include <_ansi.h> |
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| 51 | #include <reent.h> |
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| 52 | #include <stdio.h> |
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| 53 | |
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| 54 | void |
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| 55 | _rewind_r (struct _reent * ptr, |
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| 56 | register FILE * fp) |
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| 57 | { |
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| 58 | (void) _fseek_r (ptr, fp, 0L, SEEK_SET); |
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| 59 | clearerr (fp); |
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| 60 | } |
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| 61 | |
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| 62 | #ifndef _REENT_ONLY |
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| 63 | |
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| 64 | void |
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| 65 | rewind (register FILE * fp) |
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| 66 | { |
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| 67 | _rewind_r (_REENT, fp); |
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| 68 | } |
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| 69 | |
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| 70 | #endif /* !_REENT_ONLY */ |
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