int mongoc_gridfs_file_seek (mongoc_gridfs_file_t *file, int64_t delta, int whence);
- file: A mongoc_gridfs_file_t.
- delta: The amount to move the file position. May be positive or negative.
- whence: One of SEEK_SET, SEEK_CUR or SEEK_END.
Adjust the file position pointer in the given file by delta, starting from the position whence. The whence argument is interpreted as in fseek(2):
|SEEK_SET||Set the position relative to the start of the file.|
|SEEK_CUR||Move delta relative to the current file position.|
|SEEK_END||Move delta relative to the end of the file.|
On success, the file's underlying position pointer is set appropriately. On failure, the file position is NOT changed and errno is set to indicate the error.
|EINVAL||whence is not one of SEEK_SET, SEEK_CUR or SEEK_END.|
|EINVAL||The resulting file position would be negative.|
Returns 0 if successful; otherwise -1 and errno is set.
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