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- comment @ * @;
-
-
- 1.5
- date 88.07.29.18.56.38; author ouster; state Exp;
- branches 1.5.1.1;
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- 1.4
- date 88.07.28.16.48.47; author ouster; state Exp;
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- 1.3
- date 88.07.25.13.12.55; author ouster; state Exp;
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- 1.2
- date 88.07.11.09.11.07; author ouster; state Exp;
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- 1.1
- date 88.06.10.16.23.52; author ouster; state Exp;
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- 1.5.1.1
- date 91.12.02.19.58.22; author kupfer; state Exp;
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-
- desc
- @@
-
-
- 1.5
- log
- @Lint.
- @
- text
- @/*
- * ftell.c --
- *
- * Source code for the "ftell" library procedure.
- *
- * Copyright 1988 Regents of the University of California
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: ftell.c,v 1.4 88/07/28 16:48:47 ouster Exp $ SPRITE (Berkeley)";
- #endif not lint
-
- #include "stdio.h"
- #include "fileInt.h"
- #include <sys/file.h>
-
- extern long ftell(), lseek();
-
- /*
- *----------------------------------------------------------------------
- *
- * ftell --
- *
- * This procedure returns the current access position in a file
- * stream, as a byte count from the beginning of the file.
- *
- * Results:
- * The return value is the location (measured in bytes from the
- * beginning of the file associated with stream) where the next
- * byte will be read or written. If the stream doesn't
- * correspond to a file, or if there is an error during the operation,
- * then -1 is returned.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- long
- ftell(stream)
- register FILE *stream;
- {
- int count;
-
- if ((stream->readProc != (void (*)()) StdioFileReadProc) ||
- ((stream->flags & (STDIO_READ|STDIO_WRITE)) == 0)) {
- return -1;
- }
-
- count = lseek((int) stream->clientData, 0L, L_INCR);
- if (count < 0) {
- return -1;
- }
-
- /*
- * The code is different for reading and writing. For writing,
- * we add the system's idea of current position to the number
- * of bytes waiting in the buffer. For reading, subtract the
- * number of bytes still available in the buffer from the system's
- * idea of the current position.
- */
-
- if (stream->writeCount > 0) {
- count += stream->lastAccess + 1 - stream->buffer;
- } else if (stream->readCount > 0) {
- count -= stream->readCount;
- }
-
- return(count);
- }
- @
-
-
- 1.5.1.1
- log
- @Initial branch for Sprite server.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: /sprite/src/lib/c/stdio/RCS/ftell.c,v 1.5 88/07/29 18:56:38 ouster Exp $ SPRITE (Berkeley)";
- @
-
-
- 1.4
- log
- @Lint cleanup.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: ftell.c,v 1.3 88/07/25 13:12:55 ouster Exp $ SPRITE (Berkeley)";
- d58 1
- a58 1
- count = lseek((int) stream->clientData, 0, L_INCR);
- @
-
-
- 1.3
- log
- @Lint.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: ftell.c,v 1.2 88/07/11 09:11:07 ouster Exp $ SPRITE (Berkeley)";
- d24 1
- a24 1
- extern long ftell();
- @
-
-
- 1.2
- log
- @Change to return long instead of int.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: ftell.c,v 1.1 88/06/10 16:23:52 ouster Exp $ SPRITE (Berkeley)";
- d23 2
- @
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: atoi.c,v 1.1 88/04/28 17:20:23 ouster Exp $ SPRITE (Berkeley)";
- d45 1
- a45 1
- int
- @
-