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83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/*
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* Copyright 2010 INRIA Saclay
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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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*/
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#include <isl_union_macro.h>
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/* Evaluate "u" 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(UNION,eval_void)(__isl_take UNION *u,
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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(UNION,free)(u);
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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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/* Internal data structure for isl_union_*_eval.
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*
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* "pnt" is the point in which the function is evaluated.
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* "v" stores the result and is initialized to zero.
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*/
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S(UNION,eval_data) {
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isl_point *pnt;
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isl_val *v;
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};
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/* Update the evaluation in data->v based on the evaluation of "part".
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*
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* Only (at most) a single part on which this function is called
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* is assumed to evaluate to anything other than zero.
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* Since the value is initialized to zero, the evaluation of "part"
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* can simply be added.
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*/
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static isl_stat FN(UNION,eval_entry)(__isl_take PART *part, void *user)
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{
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S(UNION,eval_data) *data = user;
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isl_val *v;
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v = FN(PART,eval)(part, isl_point_copy(data->pnt));
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data->v = isl_val_add(data->v, v);
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return isl_stat_non_null(data->v);
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}
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/* Evaluate "u" in the point "pnt".
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*/
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__isl_give isl_val *FN(UNION,eval)(__isl_take UNION *u,
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__isl_take isl_point *pnt)
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{
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S(UNION,eval_data) data = { pnt };
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isl_bool is_void;
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isl_space *space;
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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(UNION,eval_void)(u, pnt);
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data.v = isl_val_zero(isl_point_get_ctx(pnt));
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space = isl_point_peek_space(pnt);
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if (FN(UNION,foreach_on_domain)(u, space,
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&FN(UNION,eval_entry), &data) < 0)
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data.v = isl_val_free(data.v);
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FN(UNION,free)(u);
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isl_point_free(pnt);
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return data.v;
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error:
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FN(UNION,free)(u);
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isl_point_free(pnt);
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return NULL;
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}
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