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Viewing changes to src/stdio/fseek.c

  • Committer: Package Import Robot
  • Author(s): Kevin Bortis
  • Date: 2013-09-20 20:54:14 UTC
  • Revision ID: package-import@ubuntu.com-20130920205414-5b61trtmma18w58o
Tags: upstream-0.9.13
Import upstream version 0.9.13

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src/stdio/fseek.c
 
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#include "stdio_impl.h"
 
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int __fseeko_unlocked(FILE *f, off_t off, int whence)
 
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{
 
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        /* Adjust relative offset for unread data in buffer, if any. */
 
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        if (whence == SEEK_CUR) off -= f->rend - f->rpos;
 
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        /* Flush write buffer, and report error on failure. */
 
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        if (f->wpos > f->wbase) {
 
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                f->write(f, 0, 0);
 
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                if (!f->wpos) return -1;
 
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        }
 
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        /* Leave writing mode */
 
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        f->wpos = f->wbase = f->wend = 0;
 
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        /* Perform the underlying seek. */
 
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        if (f->seek(f, off, whence) < 0) return -1;
 
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        /* If seek succeeded, file is seekable and we discard read buffer. */
 
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        f->rpos = f->rend = 0;
 
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        f->flags &= ~F_EOF;
 
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        return 0;
 
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}
 
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int __fseeko(FILE *f, off_t off, int whence)
 
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{
 
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        int result;
 
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        FLOCK(f);
 
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        result = __fseeko_unlocked(f, off, whence);
 
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        FUNLOCK(f);
 
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        return result;
 
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}
 
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int fseek(FILE *f, long off, int whence)
 
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{
 
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        return __fseeko(f, off, whence);
 
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}
 
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weak_alias(__fseeko, fseeko);
 
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LFS64(fseeko);