Add ftello function
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a3e4dcafe0
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3 changed files with 13 additions and 2 deletions
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@ -120,6 +120,7 @@ _PROTOTYPE( int fseek, (FILE *_stream, long _offset, int _whence) );
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_PROTOTYPE( int fseeko, (FILE *_stream, off_t _offset, int _whence) );
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_PROTOTYPE( int fseeko, (FILE *_stream, off_t _offset, int _whence) );
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_PROTOTYPE( int fsetpos, (FILE *_stream, fpos_t *_pos) );
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_PROTOTYPE( int fsetpos, (FILE *_stream, fpos_t *_pos) );
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_PROTOTYPE( long ftell, (FILE *_stream) );
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_PROTOTYPE( long ftell, (FILE *_stream) );
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_PROTOTYPE( off_t ftello, (FILE *_stream) );
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_PROTOTYPE( void rewind, (FILE *_stream) );
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_PROTOTYPE( void rewind, (FILE *_stream) );
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_PROTOTYPE( void clearerr, (FILE *_stream) );
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_PROTOTYPE( void clearerr, (FILE *_stream) );
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_PROTOTYPE( int feof, (FILE *_stream) );
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_PROTOTYPE( int feof, (FILE *_stream) );
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@ -3,6 +3,7 @@
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*/
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*/
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/* $Header$ */
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/* $Header$ */
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#include <assert.h>
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#include <stdio.h>
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#include <stdio.h>
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#if (SEEK_CUR != 1) || (SEEK_SET != 0) || (SEEK_END != 2)
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#if (SEEK_CUR != 1) || (SEEK_SET != 0) || (SEEK_END != 2)
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@ -16,6 +17,12 @@
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off_t _lseek(int fildes, off_t offset, int whence);
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off_t _lseek(int fildes, off_t offset, int whence);
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long ftell(FILE *stream)
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long ftell(FILE *stream)
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{
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assert(sizeof(long) == sizeof(off_t));
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return (long) ftello(stream);
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}
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off_t ftello(FILE *stream)
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{
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{
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long result;
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long result;
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int adjust = 0;
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int adjust = 0;
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@ -3,7 +3,7 @@
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.TH FSEEK 3 "February 24, 1986"
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.TH FSEEK 3 "February 24, 1986"
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.AT 3
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.AT 3
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.SH NAME
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.SH NAME
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fseek, fseeko, ftell, rewind \- reposition a stream
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fseek, fseeko, ftell, ftello, rewind \- reposition a stream
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.SH SYNOPSIS
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.SH SYNOPSIS
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.nf
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.nf
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.ft B
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.ft B
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@ -12,6 +12,7 @@ fseek, fseeko, ftell, rewind \- reposition a stream
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int fseek(FILE *\fIstream\fP, long \fIoffset\fP, int \fIptrname\fP)
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int fseek(FILE *\fIstream\fP, long \fIoffset\fP, int \fIptrname\fP)
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int fseeko(FILE *\fIstream\fP, off_t \fIoffset\fP, int \fIptrname\fP)
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int fseeko(FILE *\fIstream\fP, off_t \fIoffset\fP, int \fIptrname\fP)
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long ftell(FILE *\fIstream\fP)
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long ftell(FILE *\fIstream\fP)
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off_t ftello(FILE *\fIstream\fP)
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void rewind(FILE *\fIstream\fP)
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void rewind(FILE *\fIstream\fP)
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.ft R
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.ft R
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.fi
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.fi
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@ -37,7 +38,9 @@ undo any effects of
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.BR ungetc (3).
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.BR ungetc (3).
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.PP
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.PP
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.B Ftell
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.B Ftell
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returns the current value of the offset relative to the beginning
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and
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.B ftello
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return the current value of the offset relative to the beginning
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of the file associated with the named
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of the file associated with the named
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.IR stream .
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.IR stream .
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It is measured in bytes on UNIX;
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It is measured in bytes on UNIX;
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