derek.holloway
7502bf64a4
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102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/*
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* Copyright 2010 INRIA Saclay
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* Copyright 2013 Ecole Normale Superieure
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*
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* Use of this software is governed by the MIT license
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*
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* Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
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* Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
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* 91893 Orsay, France
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* and Ecole Normale Superieure, 45 rue d'Ulm, 75230 Paris, France
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*/
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#include <isl/val.h>
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#include <isl_space_private.h>
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#include <isl_point_private.h>
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#include <isl_pw_macro.h>
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#undef SUFFIX
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#define SUFFIX point
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#undef ARG1
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#define ARG1 PW
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#undef ARG2
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#define ARG2 isl_point
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static
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#include "isl_align_params_templ.c"
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/* Evaluate "pw" in the void point "pnt".
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* In particular, return the value NaN.
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*/
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static __isl_give isl_val *FN(PW,eval_void)(__isl_take PW *pw,
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__isl_take isl_point *pnt)
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{
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isl_ctx *ctx;
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ctx = isl_point_get_ctx(pnt);
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FN(PW,free)(pw);
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isl_point_free(pnt);
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return isl_val_nan(ctx);
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}
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/* Evaluate the piecewise function "pw" in "pnt".
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* If the point is void, then return NaN.
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* If the point lies outside the domain of "pw", then return 0 or NaN
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* depending on whether 0 is the default value for this type of function.
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*
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* Align the parameters if needed, but "pnt" should specify a value
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* for all parameters in "pw".
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*/
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__isl_give isl_val *FN(PW,eval)(__isl_take PW *pw, __isl_take isl_point *pnt)
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{
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int i;
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isl_bool is_void;
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isl_bool found;
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isl_ctx *ctx;
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isl_bool ok;
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isl_space *pnt_space, *pw_space;
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isl_val *v;
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FN(PW,align_params_point)(&pw, &pnt);
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pnt_space = isl_point_peek_space(pnt);
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pw_space = FN(PW,peek_space)(pw);
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ok = isl_space_is_domain_internal(pnt_space, pw_space);
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if (ok < 0)
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goto error;
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ctx = isl_point_get_ctx(pnt);
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if (!ok)
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isl_die(ctx, isl_error_invalid,
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"incompatible spaces", goto error);
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is_void = isl_point_is_void(pnt);
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if (is_void < 0)
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goto error;
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if (is_void)
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return FN(PW,eval_void)(pw, pnt);
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found = isl_bool_false;
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for (i = 0; i < pw->n; ++i) {
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found = isl_set_contains_point(pw->p[i].set, pnt);
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if (found < 0)
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goto error;
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if (found)
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break;
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}
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if (found) {
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v = FN(EL,eval)(FN(EL,copy)(pw->p[i].FIELD),
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isl_point_copy(pnt));
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} else if (DEFAULT_IS_ZERO) {
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v = isl_val_zero(ctx);
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} else {
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v = isl_val_nan(ctx);
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}
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FN(PW,free)(pw);
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isl_point_free(pnt);
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return v;
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error:
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FN(PW,free)(pw);
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isl_point_free(pnt);
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return NULL;
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}
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