libbanshee/engine/ufind.h

   1 /*
   2  * Copyright (c) 2000-2001
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  */
  30
  31 #ifndef UFIND_H
  32 #define UFIND_H
  33
  34 #include <regions.h>
  35 #include "linkage.h"
  36 #include "bool.h"
  37
  38 EXTERN_C_BEGIN
  39
  40 struct uf_element;
  41
  42 typedef struct uf_element *uf_element;
  43 typedef void *uf_info;
  44
  45 typedef uf_info (*combine_fn_ptr)(uf_info,uf_info);
  46
  47 struct uf_element *new_uf_element(region r,uf_info i);
  48 uf_info uf_get_info(struct uf_element *);
  49 bool uf_unify(combine_fn_ptr,struct uf_element *,struct uf_element *);
  50 bool uf_union(struct uf_element *,struct uf_element *);
  51 bool uf_eq(struct uf_element *,struct uf_element *);
  52 void uf_update(struct uf_element *,uf_info i);
  53
  54 #define DECLARE_UFIND(name,type) \
  55 typedef struct name *name; \
  56 typedef type (* name ## _combine_fn_ptr)(type info1,type info2); \
  57 name new_ ## name(region r, type info); \
  58 type name ## _get_info(name); \
  59 bool name ## _unify(name ## _combine_fn_ptr,name e1, name e2); \
  60 bool name ## _union(name e1, name e2); \
  61 bool name ## _eq(name e1, name e2); \
  62 void name ## _update(name e1, type info);
  63
  64 #define DEFINE_UFIND(name,type) \
  65 name new_ ## name(region r, type info) \
  66 { \
  67  return (name)new_uf_element(r,info);\
  68 }\
  69 type name ## _get_info(name elem) \
  70 { \
  71  return (type)uf_get_info((struct uf_element *)elem);\
  72 } \
  73 bool name ## _unify(name ## _combine_fn_ptr cmb,name e1, name e2) \
  74 { \
  75  return uf_unify((combine_fn_ptr)cmb,(struct uf_element *)e1,(struct uf_element *)e2); \
  76 } \
  77 bool name ## _union(name e1, name e2) \
  78 { \
  79  return uf_union((struct uf_element *)e1,(struct uf_element *)e2); \
  80 }\
  81 bool name ## _eq(name e1, name e2) \
  82 { \
  83  return uf_eq((struct uf_element *)e1,(struct uf_element *)e2); \
  84 } \
  85 void name ##_update(name e1, type info) \
  86 { \
  87  uf_update((struct uf_element *)e1,(uf_info)info); \
  88 } \
  89
  90 EXTERN_C_END
  91
  92 #endif /* UFIND_H */
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