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/*
* Copyright 2010 INRIA Saclay
*
* Use of this software is governed by the MIT license
*
* Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
* Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
* 91893 Orsay, France
*/
#include <isl_union_macro.h>
/* Evaluate "u" in the void point "pnt".
* In particular, return the value NaN.
*/
static __isl_give isl_val *FN(UNION,eval_void)(__isl_take UNION *u,
__isl_take isl_point *pnt)
{
isl_ctx *ctx;
ctx = isl_point_get_ctx(pnt);
FN(UNION,free)(u);
isl_point_free(pnt);
return isl_val_nan(ctx);
}
/* Internal data structure for isl_union_*_eval.
*
* "pnt" is the point in which the function is evaluated.
* "v" stores the result and is initialized to zero.
*/
S(UNION,eval_data) {
isl_point *pnt;
isl_val *v;
};
/* Update the evaluation in data->v based on the evaluation of "part".
*
* Only (at most) a single part on which this function is called
* is assumed to evaluate to anything other than zero.
* Since the value is initialized to zero, the evaluation of "part"
* can simply be added.
*/
static isl_stat FN(UNION,eval_entry)(__isl_take PART *part, void *user)
{
S(UNION,eval_data) *data = user;
isl_val *v;
v = FN(PART,eval)(part, isl_point_copy(data->pnt));
data->v = isl_val_add(data->v, v);
return isl_stat_non_null(data->v);
}
/* Evaluate "u" in the point "pnt".
*/
__isl_give isl_val *FN(UNION,eval)(__isl_take UNION *u,
__isl_take isl_point *pnt)
{
S(UNION,eval_data) data = { pnt };
isl_bool is_void;
isl_space *space;
is_void = isl_point_is_void(pnt);
if (is_void < 0)
goto error;
if (is_void)
return FN(UNION,eval_void)(u, pnt);
data.v = isl_val_zero(isl_point_get_ctx(pnt));
space = isl_point_peek_space(pnt);
if (FN(UNION,foreach_on_domain)(u, space,
&FN(UNION,eval_entry), &data) < 0)
data.v = isl_val_free(data.v);
FN(UNION,free)(u);
isl_point_free(pnt);
return data.v;
error:
FN(UNION,free)(u);
isl_point_free(pnt);
return NULL;
}
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