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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