SEARCHFILES_BLOCK
csf->ids = solv_extend(csf->ids, csf->nfiles, 1, sizeof(Id), SEARCHFILES_BLOCK);
csf->dirs = solv_extend(csf->dirs, csf->nfiles, 1, sizeof(const char *), SEARCHFILES_BLOCK);
csf->names = solv_extend(csf->names, csf->nfiles, 1, sizeof(const char *), SEARCHFILES_BLOCK);