37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
/* An ftell() function that works around platform bugs.
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Copyright (C) 2007-2023 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <stdio.h>
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#include <errno.h>
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#include <limits.h>
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long
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ftell (FILE *fp)
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{
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/* Use the replacement ftello function with all its workarounds. */
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off_t offset = ftello (fp);
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if (LONG_MIN <= offset && offset <= LONG_MAX)
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return /* (long) */ offset;
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else
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{
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errno = EOVERFLOW;
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return -1;
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}
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}
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