cpc_setgrp_nextset
extern cpc_set_t *cpc_setgrp_nextset(cpc_setgrp_t *sgrp);
this = cpc_setgrp_nextset(sgrp);
} while (cpc_setgrp_nextset(accum) != start);
} while (cpc_setgrp_nextset(sgrp) != start);
} while (cpc_setgrp_nextset(state->accum) != start);
} while (cpc_setgrp_nextset(state->accum) != start);
cpc_set_t *next = cpc_setgrp_nextset(sgrp);