Re: [PATCH 15/22] read-cache: read index-v5

> Make git read the index file version 5 without complaining.
>
> This version of the reader doesn't read neither the cache-tree
> nor the resolve undo data, but doesn't choke on an index that
> includes such data.
> ---
> diff --git a/read-cache-v5.c b/read-cache-v5.c
> new file mode 100644
> index 0000000..e319f30
> --- /dev/null
> +++ b/read-cache-v5.c
> @@ -0,0 +1,658 @@
> +static struct directory_entry *read_directories(unsigned int *dir_offset,
> +                               unsigned int *dir_table_offset,
> +                               void *mmap,
> +                               int mmap_size)
> +{
> +       int i, ondisk_directory_size;
> +       uint32_t *filecrc, *beginning, *end;
> +       struct directory_entry *current = NULL;
> +       struct ondisk_directory_entry *disk_de;
> +       struct directory_entry *de;
> +       unsigned int data_len, len;
> +       char *name;
> +
> +       /* Length of pathname + nul byte for termination + size of
> +        * members of ondisk_directory_entry. (Just using the size
> +        * of the stuct doesn't work, because there may be padding