ctx->compressinfo = (void *) ci;
ci->append = find_compress_hook (M_APPENDHOOK, ctx->path);
ci->open = find_compress_hook (M_OPENHOOK, ctx->path);
ctx->compressinfo = (void *) ci;
ci->append = find_compress_hook (M_APPENDHOOK, ctx->path);
ci->open = find_compress_hook (M_OPENHOOK, ctx->path);