35 lines
877 B
C
35 lines
877 B
C
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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#include <stdio.h>
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#include <io.h>
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#include <errno.h>
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int fseeko64 (FILE* stream, _off64_t offset, int whence)
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{
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fpos_t pos;
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if (whence == SEEK_CUR)
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{
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/* If stream is invalid, fgetpos sets errno. */
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if (fgetpos (stream, &pos))
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return (-1);
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pos += (fpos_t) offset;
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}
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else if (whence == SEEK_END)
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{
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/* If writing, we need to flush before getting file length. */
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fflush (stream);
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pos = (fpos_t) (_filelengthi64 (_fileno (stream)) + offset);
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}
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else if (whence == SEEK_SET)
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pos = (fpos_t) offset;
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else
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{
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errno = EINVAL;
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return (-1);
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}
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return fsetpos (stream, &pos);
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}
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