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Some folks might think: “you still use RCS”?!? And we will say, hey, at least we switched from SCCS to RCS back in … I think it was around 1994 ... at least we are keeping up! :-) :-) :-) Logs say that SCCS version 18 became RCS version 19 on 1994 March 18. RCS served us well. But now it is time to move on. And so we are switching to git. Calc releases produce a lot of file changes. In the 125 releases of calc since 1996, when I started managing calc releases, there have been 15473 file mods!
90 lines
2.6 KiB
Plaintext
90 lines
2.6 KiB
Plaintext
NAME
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fseek - set a file position
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SYNOPSIS
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fseek(fd, offset [, whence])
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TYPES
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fd open file stream
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pos integer
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whence 0, 1 or 2, defaulting to 0
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return null or error value
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DESCRIPTION
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This function sets the file position indicator for the stream by
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adding offset to zero, the current value, or the size of the
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file, according as whence is 0, 1 or 2. The effect is equivalent to
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moving the signed distance offset from the beginning, the current
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position, or the end of the file.
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The function also clears the end-of-file flag and flushes any
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buffered data waiting to be output to the stream.
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An implementation-defined error occurs if the effect would be to
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give a negative value to the position indicator; on some systems, the
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file position will be set to end-of-file.
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The file position indicator may have a value greater than the file
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size. If characters are then written to the file, the gap is
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filled by null ('\0') characters.
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EXAMPLE
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; fd = fopen("/tmp/curds", "w")
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; fputs(fd, "0123456789abcdef")
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; freopen(fd, "r")
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; fsize(fd)
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16
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; fseek(fd, 5)
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; fgets(fd)
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"56789abcdef"
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; fseek(fd, 0)
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; fscanf(fd, "%*5c")
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0
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; fseek(fd, 5, 1)
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; fgets(fd)
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"abcdef"
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; ftell(fd)
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16
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; fseek(fd, -5, 2)
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; fgets(fd)
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"bcdef"
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; fseek(fd, -2)
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System error 22
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; ftell(fd)
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16
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The results for the last four lines may be different for different systems.
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LIMITS
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Some details of the operation of this function may be implementation-
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dependent, particularly for older systems.
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LINK LIBRARY
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none
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SEE ALSO
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ftell, fgetpos, fsetpos, rewind, strerror
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## Copyright (C) 1999 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 1995/03/04 11:33:20
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## File existed as early as: 1995
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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