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      1 /*
      2  * Copyright 2010      INRIA Saclay
      3  *
      4  * Use of this software is governed by the MIT license
      5  *
      6  * Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
      7  * Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
      8  * 91893 Orsay, France
      9  */
     10 
     11 #include <isl_pw_macro.h>
     12 
     13 __isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
     14 	enum isl_dim_type type, unsigned first, unsigned n)
     15 {
     16 	int i;
     17 	isl_size n_piece;
     18 
     19 	n_piece = FN(PW,n_piece)(pw);
     20 	if (n_piece < 0)
     21 		return FN(PW,free)(pw);
     22 	if (n == 0)
     23 		return pw;
     24 
     25 	if (type == isl_dim_in)
     26 		type = isl_dim_set;
     27 
     28 	for (i = 0; i < n; ++i) {
     29 		isl_set *domain;
     30 
     31 		domain = FN(PW,take_domain_at)(pw, i);
     32 		domain = isl_set_split_dims(domain, type, first, n);
     33 		pw = FN(PW,restore_domain_at)(pw, i, domain);
     34 	}
     35 
     36 	return pw;
     37 }
     38