Viewing file:  isl_pw_eval.c (2.03 KB) -rw-r--r--
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/*
* Copyright 2010 INRIA Saclay
* Copyright 2013 Ecole Normale Superieure
*
* 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
* and Ecole Normale Superieure, 45 rue d'Ulm, 75230 Paris, France
*/
#include <isl/val.h>
#include <isl_space_private.h>
#include <isl_point_private.h>
#include <isl_pw_macro.h>
/* Evaluate "pw" in the void point "pnt".
* In particular, return the value NaN.
*/
static __isl_give isl_val *FN(PW,eval_void)(__isl_take PW *pw,
__isl_take isl_point *pnt)
{
isl_ctx *ctx;
ctx = isl_point_get_ctx(pnt);
FN(PW,free)(pw);
isl_point_free(pnt);
return isl_val_nan(ctx);
}
/* Evaluate the piecewise function "pw" in "pnt".
* If the point is void, then return NaN.
* If the point lies outside the domain of "pw", then return 0 or NaN
* depending on whether 0 is the default value for this type of function.
*/
__isl_give isl_val *FN(PW,eval)(__isl_take PW *pw, __isl_take isl_point *pnt)
{
int i;
isl_bool is_void;
isl_bool found;
isl_ctx *ctx;
isl_bool ok;
isl_space *pnt_space, *pw_space;
isl_val *v;
pnt_space = isl_point_peek_space(pnt);
pw_space = FN(PW,peek_space)(pw);
ok = isl_space_is_domain_internal(pnt_space, pw_space);
if (ok < 0)
goto error;
ctx = isl_point_get_ctx(pnt);
if (!ok)
isl_die(ctx, isl_error_invalid,
"incompatible spaces", goto error);
is_void = isl_point_is_void(pnt);
if (is_void < 0)
goto error;
if (is_void)
return FN(PW,eval_void)(pw, pnt);
found = isl_bool_false;
for (i = 0; i < pw->n; ++i) {
found = isl_set_contains_point(pw->p[i].set, pnt);
if (found < 0)
goto error;
if (found)
break;
}
if (found) {
v = FN(EL,eval)(FN(EL,copy)(pw->p[i].FIELD),
isl_point_copy(pnt));
} else if (DEFAULT_IS_ZERO) {
v = isl_val_zero(ctx);
} else {
v = isl_val_nan(ctx);
}
FN(PW,free)(pw);
isl_point_free(pnt);
return v;
error:
FN(PW,free)(pw);
isl_point_free(pnt);
return NULL;
}
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