28 lines
562 B
C
28 lines
562 B
C
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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 __cdecl
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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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pos = (fpos_t) (_filelengthi64 (_fileno (stream)) + offset);
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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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