/usr/lib/gcc-cross/mips64el-linux-gnuabi64/5/plugin/include/hash-set.h is in gcc-5-plugin-dev-mips64el-linux-gnuabi64 5.5.0-12ubuntu1cross1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 | /* A type-safe hash set.
Copyright (C) 2014-2015 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef hash_set_h
#define hash_set_h
#include "hash-table.h"
/* implement default behavior for traits when types allow it. */
struct default_hashset_traits
{
/* Hashes the passed in key. */
template<typename T>
static hashval_t
hash (T *p)
{
return uintptr_t(p) >> 3;
}
template<typename T> static hashval_t hash(const T &v) { return v; }
/* Return true if the two keys passed as arguments are equal. */
template<typename T>
static bool
equal (const T &a, const T &b)
{
return a == b;
}
/* Called to dispose of the key before marking the entry as deleted. */
template<typename T> static void remove (T &v) { v.~T (); }
/* Mark the passed in entry as being deleted. */
template<typename T>
static void
mark_deleted (T *&e)
{
e = reinterpret_cast<void *> (1);
}
/* Mark the passed in entry as being empty. */
template<typename T>
static void
mark_empty (T *&e)
{
e = NULL;
}
/* Return true if the passed in entry is marked as deleted. */
template<typename T>
static bool
is_deleted (T *e)
{
return e == reinterpret_cast<void *> (1);
}
/* Return true if the passed in entry is marked as empty. */
template<typename T> static bool is_empty (T *e) { return e == NULL; }
/* ggc walking routine, mark all objects refered to by this one. */
template<typename T>
static void
ggc_mx (T &x)
{
extern void gt_ggc_mx (T &);
gt_ggc_mx (x);
}
/* pch walking routine, note all objects refered to by this element. */
template<typename T>
static void
pch_nx (T &x)
{
extern void gt_pch_nx (T &);
gt_pch_nx (x);
}
};
template<typename Key, typename Traits = default_hashset_traits>
class hash_set
{
struct hash_entry
{
Key m_key;
typedef hash_entry value_type;
typedef Key compare_type;
typedef int store_values_directly;
static hashval_t hash (const hash_entry &e)
{
return Traits::hash (e.m_key);
}
static bool equal (const hash_entry &a, const Key &b)
{
return Traits::equal (a.m_key, b);
}
static void remove (hash_entry &e) { Traits::remove (e.m_key); }
static void
mark_deleted (hash_entry &e)
{
Traits::mark_deleted (e.m_key);
}
static bool is_deleted (const hash_entry &e)
{
return Traits::is_deleted (e.m_key);
}
static void
mark_empty (hash_entry &e)
{
Traits::mark_empty (e.m_key);
}
static bool
is_empty (const hash_entry &e)
{
return Traits::is_empty (e.m_key);
}
static void ggc_mx (hash_entry &e)
{
Traits::ggc_mx (e.m_key);
}
static void pch_nx (hash_entry &e)
{
Traits::pch_nx (e.m_key);
}
static void pch_nx (hash_entry &e, gt_pointer_operator op, void *c)
{
pch_nx_helper (e.m_key, op, c);
}
private:
template<typename T>
static void
pch_nx_helper (T &x, gt_pointer_operator op, void *cookie)
{
gt_pch_nx (&x, op, cookie);
}
template<typename T>
static void
pch_nx_helper (T *&x, gt_pointer_operator op, void *cookie)
{
op (&x, cookie);
}
};
public:
explicit hash_set (size_t n = 13, bool ggc = false) : m_table (n, ggc) {}
/* Create a hash_set in gc memory with space for at least n elements. */
static hash_set *
create_ggc (size_t n)
{
hash_set *set = ggc_alloc<hash_set> ();
new (set) hash_set (n, true);
return set;
}
/* If key k isn't already in the map add it to the map, and
return false. Otherwise return true. */
bool add (const Key &k)
{
hash_entry *e = m_table.find_slot_with_hash (k, Traits::hash (k),
INSERT);
bool existed = !hash_entry::is_empty (*e);
if (!existed)
e->m_key = k;
return existed;
}
/* if the passed in key is in the map return its value otherwise NULL. */
bool contains (const Key &k)
{
hash_entry &e = m_table.find_with_hash (k, Traits::hash (k));
return !Traits::is_empty (e.m_key);
}
/* Call the call back on each pair of key and value with the passed in
arg. */
template<typename Arg, bool (*f)(const Key &, Arg)>
void traverse (Arg a) const
{
for (typename hash_table<hash_entry>::iterator iter = m_table.begin ();
iter != m_table.end (); ++iter)
f ((*iter).m_key, a);
}
/* Return the number of elements in the set. */
size_t elements () const { return m_table.elements (); }
private:
template<typename T, typename U> friend void gt_ggc_mx (hash_set<T, U> *);
template<typename T, typename U> friend void gt_pch_nx (hash_set<T, U> *);
template<typename T, typename U> friend void gt_pch_nx (hash_set<T, U> *, gt_pointer_operator, void *);
hash_table<hash_entry> m_table;
};
/* ggc marking routines. */
template<typename K, typename H>
static inline void
gt_ggc_mx (hash_set<K, H> *h)
{
gt_ggc_mx (&h->m_table);
}
template<typename K, typename H>
static inline void
gt_pch_nx (hash_set<K, H> *h)
{
gt_pch_nx (&h->m_table);
}
template<typename K, typename H>
static inline void
gt_pch_nx (hash_set<K, H> *h, gt_pointer_operator op, void *cookie)
{
op (&h->m_table.m_entries, cookie);
}
#endif
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