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  1. /*
  2.  * Copyright (c) 1990 The Regents of the University of California.
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms are permitted
  6.  * provided that the above copyright notice and this paragraph are
  7.  * duplicated in all such forms and that any documentation,
  8.  * advertising materials, and other materials related to such
  9.  * distribution and use acknowledge that the software was developed
  10.  * by the University of California, Berkeley.  The name of the
  11.  * University may not be used to endorse or promote products derived
  12.  * from this software without specific prior written permission.
  13.  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14.  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15.  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16.  */
  17.  
  18. /*
  19. FUNCTION
  20. <<rewind>>---reinitialize a file or stream
  21.  
  22. INDEX
  23.         rewind
  24. INDEX
  25.         _rewind_r
  26.  
  27. ANSI_SYNOPSIS
  28.         #include <stdio.h>
  29.         void rewind(FILE *<[fp]>);
  30.         void _rewind_r(struct _reent *<[ptr]>, FILE *<[fp]>);
  31.  
  32. TRAD_SYNOPSIS
  33.         #include <stdio.h>
  34.         void rewind(<[fp]>)
  35.         FILE *<[fp]>;
  36.  
  37.         void _rewind_r(<[ptr]>, <[fp]>)
  38.         struct _reent *<[ptr]>;
  39.         FILE *<[fp]>;
  40.  
  41. DESCRIPTION
  42. <<rewind>> returns the file position indicator (if any) for the file
  43. or stream identified by <[fp]> to the beginning of the file.  It also
  44. clears any error indicator and flushes any pending output.
  45.  
  46. RETURNS
  47. <<rewind>> does not return a result.
  48.  
  49. PORTABILITY
  50. ANSI C requires <<rewind>>.
  51.  
  52. No supporting OS subroutines are required.
  53. */
  54.  
  55. #if defined(LIBC_SCCS) && !defined(lint)
  56. static char sccsid[] = "%W% (Berkeley) %G%";
  57. #endif /* LIBC_SCCS and not lint */
  58.  
  59. #include <_ansi.h>
  60. #include <reent.h>
  61. #include <stdio.h>
  62.  
  63. _VOID
  64. _DEFUN(_rewind_r, (ptr, fp),
  65.        struct _reent * ptr _AND
  66.        register FILE * fp)
  67. {
  68.   _CAST_VOID _fseek_r (ptr, fp, 0L, SEEK_SET);
  69.   clearerr (fp);
  70. }
  71.  
  72. #ifndef _REENT_ONLY
  73.  
  74. _VOID
  75. _DEFUN(rewind, (fp),
  76.        register FILE * fp)
  77. {
  78.   _rewind_r (_REENT, fp);
  79. }
  80.  
  81. #endif /* !_REENT_ONLY */
  82.