Mercurial > hg > xemacs-beta
annotate src/elhash.c @ 5628:81fee4aee9b6
text_width methods interface cleanup.
-------------------- ChangeLog entries follow: --------------------
src/ChangeLog addition:
2011-12-28 Didier Verna <didier@xemacs.org>
* console-impl.h (struct console_methods): Have the text_width
methods expect a frame instead of a window pointer.
* console-stream.c (stream_text_width):
* redisplay-msw.c (mswindows_text_width):
* redisplay-tty.c (tty_text_width):
* redisplay-xlike-inc.c (XLIKE_text_width): Update accordingly.
* redisplay-msw.c (mswindows_output_string):
* redisplay-xlike-inc.c (XLIKE_output_string):
* redisplay.c (redisplay_window_text_width_ichar_string):
* redisplay.c (redisplay_text_width_string): Update the callers.
This also fixes an uncertainty about always getting a window from
a domain.
| author | Didier Verna <didier@xemacs.org> |
|---|---|
| date | Wed, 28 Dec 2011 11:21:38 +0100 |
| parents | 56144c8593a8 |
| children | 3192994c49ca |
| rev | line source |
|---|---|
| 428 | 1 /* Implementation of the hash table lisp object type. |
| 2 Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc. | |
|
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3 Copyright (C) 1995, 1996, 2002, 2004, 2010 Ben Wing. |
| 428 | 4 Copyright (C) 1997 Free Software Foundation, Inc. |
| 5 | |
| 6 This file is part of XEmacs. | |
| 7 | |
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8 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation, either version 3 of the License, or (at your |
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11 option) any later version. |
| 428 | 12 |
| 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 428 | 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
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19 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 20 |
| 21 /* Synched up with: Not in FSF. */ | |
| 22 | |
| 1292 | 23 /* Author: Lost in the mists of history. At least back to Lucid 19.3, |
| 24 circa Sep 1992. Early hash table implementation allowed only `eq' as a | |
| 25 test -- other tests possible only when these objects were created from | |
| 26 the C code. | |
| 27 | |
| 28 Expansion to allow general `equal'-test Lisp-creatable tables, and hash | |
| 29 methods for the various Lisp objects in existence at the time, added | |
| 30 during 19.12 I think (early 1995?), by Ben Wing. | |
| 31 | |
| 32 Weak hash tables added by Jamie (maybe?) early on, perhaps around 19.6, | |
| 33 maybe earlier; again, only possible through the C code, and only | |
| 34 supported fully weak hash tables. Expansion to other kinds of weakness, | |
| 35 and exporting of the interface to Lisp, by Ben Wing during 19.12 | |
| 36 (early-mid 1995) or maybe 19.13 cycle (mid 1995). | |
| 37 | |
| 38 Expansion to full Common Lisp spec and interface, redoing of the | |
| 39 implementation, by Martin Buchholz, 1997? (Former hash table | |
| 40 implementation used "double hashing", I'm pretty sure, and was weirdly | |
| 41 tied into the generic hash.c code. Martin completely separated them.) | |
| 42 */ | |
| 43 | |
| 489 | 44 /* This file implements the hash table lisp object type. |
| 45 | |
| 504 | 46 This implementation was mostly written by Martin Buchholz in 1997. |
| 47 | |
| 48 The Lisp-level API (derived from Common Lisp) is almost completely | |
| 49 compatible with GNU Emacs 21, even though the implementations are | |
| 50 totally independent. | |
| 51 | |
| 489 | 52 The hash table technique used is "linear probing". Collisions are |
| 53 resolved by putting the item in the next empty place in the array | |
| 54 following the collision. Finding a hash entry performs a linear | |
| 55 search in the cluster starting at the hash value. | |
| 56 | |
| 57 On deletions from the hash table, the entries immediately following | |
| 58 the deleted entry are re-entered in the hash table. We do not have | |
| 59 a special way to mark deleted entries (known as "tombstones"). | |
| 60 | |
| 61 At the end of the hash entries ("hentries"), we leave room for an | |
| 62 entry that is always empty (the "sentinel"). | |
| 63 | |
| 64 The traditional literature on hash table implementation | |
| 65 (e.g. Knuth) suggests that too much "primary clustering" occurs | |
| 66 with linear probing. However, this literature was written when | |
| 67 locality of reference was not a factor. The discrepancy between | |
| 68 CPU speeds and memory speeds is increasing, and the speed of access | |
| 69 to memory is highly dependent on memory caches which work best when | |
| 70 there is high locality of data reference. Random access to memory | |
| 71 is up to 20 times as expensive as access to the nearest address | |
| 72 (and getting worse). So linear probing makes sense. | |
| 73 | |
| 74 But the representation doesn't actually matter that much with the | |
| 75 current elisp engine. Funcall is sufficiently slow that the choice | |
| 76 of hash table implementation is noise. */ | |
| 77 | |
| 428 | 78 #include <config.h> |
| 79 #include "lisp.h" | |
| 80 #include "bytecode.h" | |
| 81 #include "elhash.h" | |
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82 #include "gc.h" |
| 489 | 83 #include "opaque.h" |
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84 #include "buffer.h" |
| 428 | 85 |
| 86 Lisp_Object Qhash_tablep; | |
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87 Lisp_Object Qeq, Qeql, Qequal, Qequalp; |
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88 Lisp_Object Qeq_hash, Qeql_hash, Qequal_hash, Qequalp_hash; |
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89 |
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90 static Lisp_Object Qhashtable, Qhash_table, Qmake_hash_table; |
| 442 | 91 static Lisp_Object Qweakness, Qvalue, Qkey_or_value, Qkey_and_value; |
| 428 | 92 static Lisp_Object Vall_weak_hash_tables; |
| 93 static Lisp_Object Qrehash_size, Qrehash_threshold; | |
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94 static Lisp_Object Q_size, Q_weakness, Q_rehash_size, Q_rehash_threshold; |
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95 static Lisp_Object Vhash_table_test_eq, Vhash_table_test_eql; |
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96 static Lisp_Object Vhash_table_test_weak_list; |
| 428 | 97 |
| 98 /* obsolete as of 19990901 in xemacs-21.2 */ | |
| 442 | 99 static Lisp_Object Qweak, Qkey_weak, Qvalue_weak, Qkey_or_value_weak; |
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100 static Lisp_Object Qnon_weak; |
| 428 | 101 |
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102 /* A hash table test, with its associated hash function. equal_function may |
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103 call lisp_equal_function, and hash_function similarly may call |
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104 lisp_hash_function. */ |
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105 struct Hash_Table_Test |
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106 { |
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107 NORMAL_LISP_OBJECT_HEADER header; |
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108 Lisp_Object name; |
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109 hash_table_equal_function_t equal_function; |
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110 hash_table_hash_function_t hash_function; |
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111 Lisp_Object lisp_equal_function; |
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112 Lisp_Object lisp_hash_function; |
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113 }; |
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114 |
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115 static Lisp_Object |
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116 mark_hash_table_test (Lisp_Object obj) |
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117 { |
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118 Hash_Table_Test *http = XHASH_TABLE_TEST (obj); |
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119 |
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120 mark_object (http->name); |
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121 mark_object (http->lisp_equal_function); |
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122 mark_object (http->lisp_hash_function); |
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123 |
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124 return Qnil; |
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125 } |
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126 |
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127 static const struct memory_description hash_table_test_description_1[] = |
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128 { |
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129 { XD_LISP_OBJECT, offsetof (struct Hash_Table_Test, name) }, |
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130 { XD_LISP_OBJECT, offsetof (struct Hash_Table_Test, lisp_equal_function) }, |
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131 { XD_LISP_OBJECT, offsetof (struct Hash_Table_Test, lisp_hash_function) }, |
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132 { XD_END } |
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133 }; |
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134 |
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135 static const struct sized_memory_description hash_table_test_description = |
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136 { |
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137 sizeof (struct Hash_Table_Test), |
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138 hash_table_test_description_1 |
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139 }; |
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140 |
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141 DEFINE_DUMPABLE_INTERNAL_LISP_OBJECT ("hash-table-test", hash_table_test, |
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142 mark_hash_table_test, |
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143 hash_table_test_description_1, |
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144 Hash_Table_Test); |
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145 /* A hash table. */ |
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146 |
| 428 | 147 struct Lisp_Hash_Table |
| 148 { | |
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149 NORMAL_LISP_OBJECT_HEADER header; |
| 665 | 150 Elemcount size; |
| 151 Elemcount count; | |
| 152 Elemcount rehash_count; | |
| 428 | 153 double rehash_size; |
| 154 double rehash_threshold; | |
| 665 | 155 Elemcount golden_ratio; |
| 1204 | 156 htentry *hentries; |
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157 Lisp_Object test; |
| 428 | 158 enum hash_table_weakness weakness; |
| 159 Lisp_Object next_weak; /* Used to chain together all of the weak | |
| 160 hash tables. Don't mark through this. */ | |
| 161 }; | |
| 162 | |
| 1204 | 163 #define CLEAR_HTENTRY(htentry) \ |
| 164 ((*(EMACS_UINT*)(&((htentry)->key))) = 0, \ | |
| 165 (*(EMACS_UINT*)(&((htentry)->value))) = 0) | |
| 428 | 166 |
| 167 #define HASH_TABLE_DEFAULT_SIZE 16 | |
| 168 #define HASH_TABLE_DEFAULT_REHASH_SIZE 1.3 | |
| 169 #define HASH_TABLE_MIN_SIZE 10 | |
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170 #define HASH_TABLE_DEFAULT_REHASH_THRESHOLD(size, test) \ |
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171 (((size) > 4096 && EQ (Vhash_table_test_eq, test)) ? 0.7 : 0.6) |
| 428 | 172 |
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173 #define HASHCODE(key, ht, http) \ |
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174 ((((!EQ (Vhash_table_test_eq, ht->test)) ? \ |
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175 (http)->hash_function (http, key) : \ |
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176 LISP_HASH (key)) * (ht)->golden_ratio) % (ht)->size) |
| 428 | 177 |
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178 #define KEYS_EQUAL_P(key1, key2, test, http) \ |
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179 (EQ (key1, key2) || ((!EQ (Vhash_table_test_eq, test) && \ |
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180 (http->equal_function) (http, key1, key2)))) |
| 428 | 181 |
| 182 #define LINEAR_PROBING_LOOP(probe, entries, size) \ | |
| 183 for (; \ | |
| 1204 | 184 !HTENTRY_CLEAR_P (probe) || \ |
| 428 | 185 (probe == entries + size ? \ |
| 1204 | 186 (probe = entries, !HTENTRY_CLEAR_P (probe)) : 0); \ |
| 428 | 187 probe++) |
| 188 | |
| 800 | 189 #ifdef ERROR_CHECK_STRUCTURES |
| 428 | 190 static void |
| 191 check_hash_table_invariants (Lisp_Hash_Table *ht) | |
| 192 { | |
| 193 assert (ht->count < ht->size); | |
| 194 assert (ht->count <= ht->rehash_count); | |
| 195 assert (ht->rehash_count < ht->size); | |
| 196 assert ((double) ht->count * ht->rehash_threshold - 1 <= (double) ht->rehash_count); | |
| 1204 | 197 assert (HTENTRY_CLEAR_P (ht->hentries + ht->size)); |
| 428 | 198 } |
| 199 #else | |
| 200 #define check_hash_table_invariants(ht) | |
| 201 #endif | |
| 202 | |
| 203 /* Return a suitable size for a hash table, with at least SIZE slots. */ | |
| 665 | 204 static Elemcount |
| 205 hash_table_size (Elemcount requested_size) | |
| 428 | 206 { |
| 207 /* Return some prime near, but greater than or equal to, SIZE. | |
| 208 Decades from the time of writing, someone will have a system large | |
| 209 enough that the list below will be too short... */ | |
| 665 | 210 static const Elemcount primes [] = |
| 428 | 211 { |
| 212 19, 29, 41, 59, 79, 107, 149, 197, 263, 347, 457, 599, 787, 1031, | |
| 213 1361, 1777, 2333, 3037, 3967, 5167, 6719, 8737, 11369, 14783, | |
| 214 19219, 24989, 32491, 42257, 54941, 71429, 92861, 120721, 156941, | |
| 215 204047, 265271, 344857, 448321, 582821, 757693, 985003, 1280519, | |
| 216 1664681, 2164111, 2813353, 3657361, 4754591, 6180989, 8035301, | |
| 217 10445899, 13579681, 17653589, 22949669, 29834603, 38784989, | |
| 218 50420551, 65546729, 85210757, 110774011, 144006217, 187208107, | |
| 219 243370577, 316381771, 411296309, 534685237, 695090819, 903618083, | |
| 647 | 220 1174703521, 1527114613, 1985248999 /* , 2580823717UL, 3355070839UL */ |
| 428 | 221 }; |
| 222 /* We've heard of binary search. */ | |
| 223 int low, high; | |
| 224 for (low = 0, high = countof (primes) - 1; high - low > 1;) | |
| 225 { | |
| 226 /* Loop Invariant: size < primes [high] */ | |
| 227 int mid = (low + high) / 2; | |
| 228 if (primes [mid] < requested_size) | |
| 229 low = mid; | |
| 230 else | |
| 231 high = mid; | |
| 232 } | |
| 233 return primes [high]; | |
| 234 } | |
| 235 | |
| 236 | |
| 237 | |
| 238 static int | |
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239 lisp_object_eql_equal (const Hash_Table_Test *UNUSED (http), Lisp_Object obj1, |
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240 Lisp_Object obj2) |
| 428 | 241 { |
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242 return EQ (obj1, obj2) || |
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243 (NON_FIXNUM_NUMBER_P (obj1) && internal_equal (obj1, obj2, 0)); |
| 428 | 244 } |
| 245 | |
| 665 | 246 static Hashcode |
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247 lisp_object_eql_hash (const Hash_Table_Test *UNUSED (http), Lisp_Object obj) |
| 428 | 248 { |
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249 return NON_FIXNUM_NUMBER_P (obj) ? |
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250 internal_hash (obj, 0, 0) : LISP_HASH (obj); |
| 428 | 251 } |
| 252 | |
| 253 static int | |
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254 lisp_object_equal_equal (const Hash_Table_Test *UNUSED (http), |
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255 Lisp_Object obj1, Lisp_Object obj2) |
| 428 | 256 { |
| 257 return internal_equal (obj1, obj2, 0); | |
| 258 } | |
| 259 | |
| 665 | 260 static Hashcode |
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261 lisp_object_equal_hash (const Hash_Table_Test *UNUSED (http), Lisp_Object obj) |
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262 { |
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263 return internal_hash (obj, 0, 0); |
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264 } |
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265 |
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266 static Hashcode |
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267 lisp_object_equalp_hash (const Hash_Table_Test *UNUSED (http), Lisp_Object obj) |
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268 { |
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269 return internal_hash (obj, 0, 1); |
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270 } |
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271 |
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272 static int |
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273 lisp_object_equalp_equal (const Hash_Table_Test *UNUSED (http), |
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274 Lisp_Object obj1, Lisp_Object obj2) |
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275 { |
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276 return internal_equalp (obj1, obj2, 0); |
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277 } |
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278 |
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279 static Hashcode |
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280 lisp_object_general_hash (const Hash_Table_Test *http, Lisp_Object obj) |
| 428 | 281 { |
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282 struct gcpro gcpro1; |
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283 Lisp_Object args[2] = { http->lisp_hash_function, obj }, res; |
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284 |
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285 /* Make sure any weakly referenced objects don't get collected before the |
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286 funcall: */ |
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287 GCPRO1 (args[0]); |
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288 gcpro1.nvars = countof (args); |
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289 res = IGNORE_MULTIPLE_VALUES (Ffuncall (countof (args), args)); |
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290 UNGCPRO; |
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291 |
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292 if (FIXNUMP (res)) |
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293 { |
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294 return (Hashcode) (XFIXNUM (res)); |
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295 } |
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296 |
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297 #ifdef HAVE_BIGNUM |
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298 if (BIGNUMP (res)) |
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299 { |
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300 if (bignum_fits_emacs_int_p (XBIGNUM_DATA (res))) |
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301 { |
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302 return (Hashcode) bignum_to_emacs_int (XBIGNUM_DATA (res)); |
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303 } |
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304 |
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305 signal_error (Qrange_error, "Not a valid hash code", res); |
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306 } |
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307 #endif |
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308 |
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309 dead_wrong_type_argument (Qintegerp, res); |
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310 } |
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311 |
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312 static int |
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313 lisp_object_general_equal (const Hash_Table_Test *http, Lisp_Object obj1, |
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314 Lisp_Object obj2) |
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315 { |
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316 struct gcpro gcpro1; |
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317 Lisp_Object args[] = { http->lisp_equal_function, obj1, obj2 }, res; |
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318 |
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319 GCPRO1 (args[0]); |
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320 gcpro1.nvars = countof (args); |
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321 res = IGNORE_MULTIPLE_VALUES (Ffuncall (countof (args), args)); |
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322 UNGCPRO; |
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323 |
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324 return !(NILP (res)); |
| 428 | 325 } |
| 326 | |
| 327 | |
| 328 static Lisp_Object | |
| 329 mark_hash_table (Lisp_Object obj) | |
| 330 { | |
| 331 Lisp_Hash_Table *ht = XHASH_TABLE (obj); | |
| 332 | |
| 333 /* If the hash table is weak, we don't want to mark the keys and | |
| 334 values (we scan over them after everything else has been marked, | |
| 335 and mark or remove them as necessary). */ | |
| 336 if (ht->weakness == HASH_TABLE_NON_WEAK) | |
| 337 { | |
| 1204 | 338 htentry *e, *sentinel; |
| 428 | 339 |
| 340 for (e = ht->hentries, sentinel = e + ht->size; e < sentinel; e++) | |
| 1204 | 341 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 342 { |
| 343 mark_object (e->key); | |
| 344 mark_object (e->value); | |
| 345 } | |
| 346 } | |
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347 |
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348 mark_object (ht->test); |
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349 |
| 428 | 350 return Qnil; |
| 351 } | |
| 352 | |
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353 static int |
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354 nsubst_structures_map_hash_table (Lisp_Object key, Lisp_Object value, |
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355 void *extra_arg) |
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356 { |
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357 Lisp_Object number_table |
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358 = ((nsubst_structures_info_t *) extra_arg)->number_table; |
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359 Lisp_Object new_ = ((nsubst_structures_info_t *) extra_arg)->new_; |
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360 Lisp_Object old = ((nsubst_structures_info_t *) extra_arg)->old; |
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361 Lisp_Object hash_table |
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362 = ((nsubst_structures_info_t *) extra_arg)->current_object; |
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363 Boolint test_not_unboundp |
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364 = ((nsubst_structures_info_t *) extra_arg)->test_not_unboundp; |
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365 |
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366 if (EQ (old, key) == test_not_unboundp) |
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367 { |
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368 Fremhash (key, hash_table); |
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369 Fputhash (new_, value, hash_table); |
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370 } |
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371 else if (LRECORDP (key) && |
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372 HAS_OBJECT_METH_P (key, nsubst_structures_descend)) |
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373 { |
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374 nsubst_structures_descend (new_, old, key, number_table, |
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375 test_not_unboundp); |
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376 } |
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377 |
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378 if (EQ (old, value) == test_not_unboundp) |
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379 { |
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380 Fputhash (key, new_, hash_table); |
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381 } |
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382 else if (LRECORDP (value) && |
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383 HAS_OBJECT_METH_P (value, nsubst_structures_descend)) |
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384 { |
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385 nsubst_structures_descend (new_, old, value, number_table, |
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386 test_not_unboundp); |
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387 } |
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388 |
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389 return 0; |
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390 } |
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391 |
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392 static void |
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393 hash_table_nsubst_structures_descend (Lisp_Object new_, Lisp_Object old, |
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394 Lisp_Object object, |
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395 Lisp_Object number_table, |
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396 Boolint test_not_unboundp) |
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397 { |
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398 nsubst_structures_info_t nsubst_structures_info |
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399 = { number_table, new_, old, object, test_not_unboundp }; |
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400 |
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401 /* If we're happy with limiting nsubst_structures to use in the Lisp |
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402 reader, we don't have to worry about the hash table test here, because |
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403 the only point where NEW_ can be the test will be forms like so: |
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404 #%d=#:SOME-GENSYM, in which case OLD will most definitively not include |
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405 a hash table anywhere in its structure. */ |
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406 |
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407 elisp_maphash (nsubst_structures_map_hash_table, object, |
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408 &nsubst_structures_info); |
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409 } |
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410 |
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411 static int |
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412 print_preprocess_mapper (Lisp_Object key, Lisp_Object value, void *extra_arg) |
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413 { |
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414 Lisp_Object print_number_table = ((preprocess_info_t *) extra_arg)->table; |
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415 Elemcount *seen_number_count = ((preprocess_info_t *) extra_arg)->count; |
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416 |
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417 PRINT_PREPROCESS (key, print_number_table, seen_number_count); |
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418 PRINT_PREPROCESS (value, print_number_table, seen_number_count); |
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419 |
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420 return 0; |
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421 } |
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422 |
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423 static void |
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424 hash_table_print_preprocess (Lisp_Object obj, Lisp_Object number_table, |
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425 Elemcount *seen_object_count) |
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426 { |
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427 preprocess_info_t preprocess_info = { number_table, |
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428 seen_object_count }; |
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429 |
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430 print_preprocess (XHASH_TABLE_TEST (XHASH_TABLE (obj)->test)->name, |
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431 number_table, seen_object_count); |
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432 |
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433 elisp_maphash_unsafe (print_preprocess_mapper, obj, &preprocess_info); |
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434 } |
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435 |
| 428 | 436 /* Equality of hash tables. Two hash tables are equal when they are of |
| 437 the same weakness and test function, they have the same number of | |
| 438 elements, and for each key in the hash table, the values are `equal'. | |
| 439 | |
| 440 This is similar to Common Lisp `equalp' of hash tables, with the | |
| 441 difference that CL requires the keys to be compared with the test | |
| 442 function, which we don't do. Doing that would require consing, and | |
| 443 consing is a bad idea in `equal'. Anyway, our method should provide | |
| 444 the same result -- if the keys are not equal according to the test | |
| 445 function, then Fgethash() in hash_table_equal_mapper() will fail. */ | |
| 446 static int | |
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447 hash_table_equal (Lisp_Object hash_table1, Lisp_Object hash_table2, int depth, |
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448 int foldcase) |
| 428 | 449 { |
| 450 Lisp_Hash_Table *ht1 = XHASH_TABLE (hash_table1); | |
| 451 Lisp_Hash_Table *ht2 = XHASH_TABLE (hash_table2); | |
| 1204 | 452 htentry *e, *sentinel; |
| 428 | 453 |
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454 if (!(EQ (ht1->test, ht2->test)) || |
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455 (ht1->weakness != ht2->weakness) || |
| 428 | 456 (ht1->count != ht2->count)) |
| 457 return 0; | |
| 458 | |
| 459 depth++; | |
| 460 | |
| 461 for (e = ht1->hentries, sentinel = e + ht1->size; e < sentinel; e++) | |
| 1204 | 462 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 463 /* Look up the key in the other hash table, and compare the values. */ |
| 464 { | |
| 465 Lisp_Object value_in_other = Fgethash (e->key, hash_table2, Qunbound); | |
| 466 if (UNBOUNDP (value_in_other) || | |
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467 !internal_equal_0 (e->value, value_in_other, depth, foldcase)) |
| 428 | 468 return 0; /* Give up */ |
| 469 } | |
| 470 | |
| 471 return 1; | |
| 472 } | |
| 442 | 473 |
| 474 /* This is not a great hash function, but it _is_ correct and fast. | |
| 475 Examining all entries is too expensive, and examining a random | |
| 476 subset does not yield a correct hash function. */ | |
| 665 | 477 static Hashcode |
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478 hash_table_hash (Lisp_Object hash_table, int UNUSED (depth), |
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479 int UNUSED (equalp)) |
| 442 | 480 { |
| 481 return XHASH_TABLE (hash_table)->count; | |
| 482 } | |
| 483 | |
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484 #ifdef MEMORY_USAGE_STATS |
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485 |
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486 struct hash_table_stats |
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487 { |
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488 struct usage_stats u; |
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489 Bytecount hentries; |
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490 }; |
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491 |
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492 static void |
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493 hash_table_memory_usage (Lisp_Object hashtab, |
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494 struct generic_usage_stats *gustats) |
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495 { |
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496 Lisp_Hash_Table *ht = XHASH_TABLE (hashtab); |
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497 struct hash_table_stats *stats = (struct hash_table_stats *) gustats; |
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498 stats->hentries += |
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499 malloced_storage_size (ht->hentries, |
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500 sizeof (htentry) * (ht->size + 1), |
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501 &stats->u); |
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502 } |
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503 |
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504 #endif /* MEMORY_USAGE_STATS */ |
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505 |
| 428 | 506 |
| 507 /* Printing hash tables. | |
| 508 | |
| 509 This is non-trivial, because we use a readable structure-style | |
| 510 syntax for hash tables. This means that a typical hash table will be | |
| 511 readably printed in the form of: | |
| 512 | |
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513 #s(hash-table :size 2 :data (key1 value1 key2 value2)) |
| 428 | 514 |
| 515 The supported hash table structure keywords and their values are: | |
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516 `:test' (eql (or nil), eq or equal) |
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517 `:size' (a natnum or nil) |
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518 `:rehash-size' (a float) |
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519 `:rehash-threshold' (a float) |
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520 `:weakness' (nil, key, value, key-and-value, or key-or-value) |
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521 `:data' (a list) |
| 428 | 522 |
| 430 | 523 If `print-readably' is nil, then a simpler syntax is used, for example |
| 428 | 524 |
| 525 #<hash-table size 2/13 data (key1 value1 key2 value2) 0x874d> | |
| 526 | |
| 527 The data is truncated to four pairs, and the rest is shown with | |
| 528 `...'. This printer does not cons. */ | |
| 529 | |
| 530 | |
| 531 /* Print the data of the hash table. This maps through a Lisp | |
| 532 hash table and prints key/value pairs using PRINTCHARFUN. */ | |
| 533 static void | |
| 534 print_hash_table_data (Lisp_Hash_Table *ht, Lisp_Object printcharfun) | |
| 535 { | |
| 536 int count = 0; | |
| 1204 | 537 htentry *e, *sentinel; |
| 428 | 538 |
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539 write_ascstring (printcharfun, " :data ("); |
| 428 | 540 |
| 541 for (e = ht->hentries, sentinel = e + ht->size; e < sentinel; e++) | |
| 1204 | 542 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 543 { |
| 544 if (count > 0) | |
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545 write_ascstring (printcharfun, " "); |
| 428 | 546 if (!print_readably && count > 3) |
| 547 { | |
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548 write_ascstring (printcharfun, "..."); |
| 428 | 549 break; |
| 550 } | |
| 551 print_internal (e->key, printcharfun, 1); | |
| 800 | 552 write_fmt_string_lisp (printcharfun, " %S", 1, e->value); |
| 428 | 553 count++; |
| 554 } | |
| 555 | |
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556 write_ascstring (printcharfun, ")"); |
| 428 | 557 } |
| 558 | |
| 559 static void | |
| 2286 | 560 print_hash_table (Lisp_Object obj, Lisp_Object printcharfun, |
| 561 int UNUSED (escapeflag)) | |
| 428 | 562 { |
| 563 Lisp_Hash_Table *ht = XHASH_TABLE (obj); | |
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564 Ascbyte pigbuf[350]; |
| 428 | 565 |
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566 write_ascstring (printcharfun, |
| 826 | 567 print_readably ? "#s(hash-table" : "#<hash-table"); |
| 428 | 568 |
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569 if (!(EQ (ht->test, Vhash_table_test_eql))) |
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570 { |
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571 write_fmt_string_lisp (printcharfun, " :test %S", |
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572 1, XHASH_TABLE_TEST (ht->test)->name); |
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573 } |
| 428 | 574 |
| 575 if (ht->count || !print_readably) | |
| 576 { | |
| 577 if (print_readably) | |
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578 write_fmt_string (printcharfun, " :size %ld", (long) ht->count); |
| 428 | 579 else |
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580 write_fmt_string (printcharfun, " :size %ld/%ld", (long) ht->count, |
| 800 | 581 (long) ht->size); |
| 428 | 582 } |
| 583 | |
| 584 if (ht->weakness != HASH_TABLE_NON_WEAK) | |
| 585 { | |
| 800 | 586 write_fmt_string |
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587 (printcharfun, " :weakness %s", |
| 800 | 588 (ht->weakness == HASH_TABLE_WEAK ? "key-and-value" : |
| 589 ht->weakness == HASH_TABLE_KEY_WEAK ? "key" : | |
| 590 ht->weakness == HASH_TABLE_VALUE_WEAK ? "value" : | |
| 591 ht->weakness == HASH_TABLE_KEY_VALUE_WEAK ? "key-or-value" : | |
| 592 "you-d-better-not-see-this")); | |
| 428 | 593 } |
| 594 | |
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595 if (ht->rehash_size != HASH_TABLE_DEFAULT_REHASH_SIZE) |
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596 { |
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597 float_to_string (pigbuf, ht->rehash_size); |
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598 write_fmt_string (printcharfun, " :rehash-size %s", pigbuf); |
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599 } |
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600 |
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601 if (ht->rehash_threshold |
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602 != HASH_TABLE_DEFAULT_REHASH_THRESHOLD (ht->size, ht->test)) |
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603 { |
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604 float_to_string (pigbuf, ht->rehash_threshold); |
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605 write_fmt_string (printcharfun, " :rehash-threshold %s", pigbuf); |
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606 } |
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607 |
| 428 | 608 if (ht->count) |
| 609 print_hash_table_data (ht, printcharfun); | |
| 610 | |
| 611 if (print_readably) | |
|
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612 write_ascstring (printcharfun, ")"); |
| 428 | 613 else |
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614 write_fmt_string (printcharfun, " 0x%x>", LISP_OBJECT_UID (obj)); |
| 428 | 615 } |
| 616 | |
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617 #ifdef ERROR_CHECK_STRUCTURES |
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618 #define USED_IF_ERROR_CHECK_STRUCTURES(x) x |
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619 #else |
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620 #define USED_IF_ERROR_CHECK_STRUCTURES(x) UNUSED (x) |
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621 #endif |
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622 |
| 4117 | 623 #ifndef NEW_GC |
| 428 | 624 static void |
| 4117 | 625 free_hentries (htentry *hentries, |
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626 Elemcount USED_IF_ERROR_CHECK_STRUCTURES (size)) |
| 489 | 627 { |
| 800 | 628 #ifdef ERROR_CHECK_STRUCTURES |
| 489 | 629 /* Ensure a crash if other code uses the discarded entries afterwards. */ |
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630 deadbeef_memory (hentries, |
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631 (Rawbyte *) (hentries + size) - (Rawbyte *) hentries); |
| 489 | 632 #endif |
| 633 | |
| 634 if (!DUMPEDP (hentries)) | |
|
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635 xfree (hentries); |
| 489 | 636 } |
| 637 | |
| 638 static void | |
|
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639 finalize_hash_table (Lisp_Object obj) |
| 428 | 640 { |
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641 Lisp_Hash_Table *ht = XHASH_TABLE (obj); |
|
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642 free_hentries (ht->hentries, ht->size); |
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643 ht->hentries = 0; |
| 428 | 644 } |
| 3263 | 645 #endif /* not NEW_GC */ |
| 428 | 646 |
| 1204 | 647 static const struct memory_description htentry_description_1[] = { |
| 648 { XD_LISP_OBJECT, offsetof (htentry, key) }, | |
| 649 { XD_LISP_OBJECT, offsetof (htentry, value) }, | |
| 428 | 650 { XD_END } |
| 651 }; | |
| 652 | |
| 1204 | 653 static const struct sized_memory_description htentry_description = { |
| 654 sizeof (htentry), | |
| 655 htentry_description_1 | |
| 428 | 656 }; |
| 657 | |
| 3092 | 658 #ifdef NEW_GC |
| 659 static const struct memory_description htentry_weak_description_1[] = { | |
| 660 { XD_LISP_OBJECT, offsetof (htentry, key), 0, { 0 }, XD_FLAG_NO_KKCC}, | |
| 661 { XD_LISP_OBJECT, offsetof (htentry, value), 0, { 0 }, XD_FLAG_NO_KKCC}, | |
| 662 { XD_END } | |
| 663 }; | |
| 664 | |
| 665 static const struct sized_memory_description htentry_weak_description = { | |
| 666 sizeof (htentry), | |
| 667 htentry_weak_description_1 | |
| 668 }; | |
| 669 | |
|
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670 DEFINE_DUMPABLE_INTERNAL_LISP_OBJECT ("hash-table-entry", hash_table_entry, |
|
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671 0, htentry_description_1, |
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672 Lisp_Hash_Table_Entry); |
| 3092 | 673 #endif /* NEW_GC */ |
| 674 | |
| 1204 | 675 static const struct memory_description htentry_union_description_1[] = { |
| 676 /* Note: XD_INDIRECT in this table refers to the surrounding table, | |
| 677 and so this will work. */ | |
| 3092 | 678 #ifdef NEW_GC |
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679 { XD_INLINE_LISP_OBJECT_BLOCK_PTR, HASH_TABLE_NON_WEAK, |
| 3092 | 680 XD_INDIRECT (0, 1), { &htentry_description } }, |
|
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681 { XD_INLINE_LISP_OBJECT_BLOCK_PTR, 0, XD_INDIRECT (0, 1), |
| 3092 | 682 { &htentry_weak_description }, XD_FLAG_UNION_DEFAULT_ENTRY }, |
| 683 #else /* not NEW_GC */ | |
| 2367 | 684 { XD_BLOCK_PTR, HASH_TABLE_NON_WEAK, XD_INDIRECT (0, 1), |
| 2551 | 685 { &htentry_description } }, |
| 686 { XD_BLOCK_PTR, 0, XD_INDIRECT (0, 1), { &htentry_description }, | |
| 1204 | 687 XD_FLAG_UNION_DEFAULT_ENTRY | XD_FLAG_NO_KKCC }, |
| 3092 | 688 #endif /* not NEW_GC */ |
| 1204 | 689 { XD_END } |
| 690 }; | |
| 691 | |
| 692 static const struct sized_memory_description htentry_union_description = { | |
| 693 sizeof (htentry *), | |
| 694 htentry_union_description_1 | |
| 695 }; | |
| 696 | |
| 697 const struct memory_description hash_table_description[] = { | |
| 698 { XD_ELEMCOUNT, offsetof (Lisp_Hash_Table, size) }, | |
| 699 { XD_INT, offsetof (Lisp_Hash_Table, weakness) }, | |
| 700 { XD_UNION, offsetof (Lisp_Hash_Table, hentries), XD_INDIRECT (1, 0), | |
| 2551 | 701 { &htentry_union_description } }, |
| 440 | 702 { XD_LO_LINK, offsetof (Lisp_Hash_Table, next_weak) }, |
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703 { XD_LISP_OBJECT,offsetof (Lisp_Hash_Table, test) }, |
| 428 | 704 { XD_END } |
| 705 }; | |
| 706 | |
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707 DEFINE_DUMPABLE_LISP_OBJECT ("hash-table", hash_table, |
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708 mark_hash_table, print_hash_table, |
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709 IF_OLD_GC (finalize_hash_table), |
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710 hash_table_equal, hash_table_hash, |
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711 hash_table_description, |
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712 Lisp_Hash_Table); |
| 428 | 713 |
| 714 static Lisp_Hash_Table * | |
| 715 xhash_table (Lisp_Object hash_table) | |
| 716 { | |
| 1123 | 717 /* #### What's going on here? Why the gc_in_progress check? */ |
| 428 | 718 if (!gc_in_progress) |
| 719 CHECK_HASH_TABLE (hash_table); | |
| 720 check_hash_table_invariants (XHASH_TABLE (hash_table)); | |
| 721 return XHASH_TABLE (hash_table); | |
| 722 } | |
| 723 | |
| 724 | |
| 725 /************************************************************************/ | |
| 726 /* Creation of Hash Tables */ | |
| 727 /************************************************************************/ | |
| 728 | |
| 729 /* Creation of hash tables, without error-checking. */ | |
| 730 static void | |
| 731 compute_hash_table_derived_values (Lisp_Hash_Table *ht) | |
| 732 { | |
| 665 | 733 ht->rehash_count = (Elemcount) |
| 438 | 734 ((double) ht->size * ht->rehash_threshold); |
| 665 | 735 ht->golden_ratio = (Elemcount) |
| 428 | 736 ((double) ht->size * (.6180339887 / (double) sizeof (Lisp_Object))); |
| 737 } | |
| 738 | |
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739 static htentry * |
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740 allocate_hash_table_entries (Elemcount size) |
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741 { |
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742 #ifdef NEW_GC |
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743 return XHASH_TABLE_ENTRY (alloc_lrecord_array |
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744 (size, &lrecord_hash_table_entry)); |
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745 #else /* not NEW_GC */ |
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746 return xnew_array_and_zero (htentry, size); |
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747 #endif /* not NEW_GC */ |
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748 } |
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749 |
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750 static Lisp_Object decode_hash_table_test (Lisp_Object obj); |
| 450 | 751 |
| 752 Lisp_Object | |
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753 make_general_lisp_hash_table (Lisp_Object test, |
| 665 | 754 Elemcount size, |
| 428 | 755 double rehash_size, |
| 756 double rehash_threshold, | |
| 757 enum hash_table_weakness weakness) | |
| 758 { | |
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759 Lisp_Object hash_table = ALLOC_NORMAL_LISP_OBJECT (hash_table); |
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760 Lisp_Hash_Table *ht = XHASH_TABLE (hash_table); |
| 428 | 761 |
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762 assert (HASH_TABLE_TESTP (test)); |
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763 |
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764 ht->test = test; |
| 438 | 765 ht->weakness = weakness; |
| 766 | |
| 767 ht->rehash_size = | |
| 768 rehash_size > 1.0 ? rehash_size : HASH_TABLE_DEFAULT_REHASH_SIZE; | |
| 769 | |
| 770 ht->rehash_threshold = | |
| 771 rehash_threshold > 0.0 ? rehash_threshold : | |
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772 HASH_TABLE_DEFAULT_REHASH_THRESHOLD (size, ht->test); |
| 438 | 773 |
| 428 | 774 if (size < HASH_TABLE_MIN_SIZE) |
| 775 size = HASH_TABLE_MIN_SIZE; | |
| 665 | 776 ht->size = hash_table_size ((Elemcount) (((double) size / ht->rehash_threshold) |
| 438 | 777 + 1.0)); |
| 428 | 778 ht->count = 0; |
| 438 | 779 |
| 428 | 780 compute_hash_table_derived_values (ht); |
| 781 | |
| 1204 | 782 /* We leave room for one never-occupied sentinel htentry at the end. */ |
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783 ht->hentries = allocate_hash_table_entries (ht->size + 1); |
| 428 | 784 |
| 785 if (weakness == HASH_TABLE_NON_WEAK) | |
| 786 ht->next_weak = Qunbound; | |
| 787 else | |
| 788 ht->next_weak = Vall_weak_hash_tables, Vall_weak_hash_tables = hash_table; | |
| 789 | |
| 790 return hash_table; | |
| 791 } | |
| 792 | |
| 793 Lisp_Object | |
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794 make_lisp_hash_table (Elemcount size, enum hash_table_weakness weakness, |
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795 Lisp_Object test) |
| 428 | 796 { |
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797 test = decode_hash_table_test (test); |
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798 return make_general_lisp_hash_table (test, size, -1.0, -1.0, weakness); |
| 428 | 799 } |
| 800 | |
| 801 /* Pretty reading of hash tables. | |
| 802 | |
| 803 Here we use the existing structures mechanism (which is, | |
| 804 unfortunately, pretty cumbersome) for validating and instantiating | |
| 805 the hash tables. The idea is that the side-effect of reading a | |
| 806 #s(hash-table PLIST) object is creation of a hash table with desired | |
| 807 properties, and that the hash table is returned. */ | |
| 808 | |
| 809 /* Validation functions: each keyword provides its own validation | |
| 810 function. The errors should maybe be continuable, but it is | |
| 811 unclear how this would cope with ERRB. */ | |
| 812 static int | |
| 2286 | 813 hash_table_size_validate (Lisp_Object UNUSED (keyword), Lisp_Object value, |
| 814 Error_Behavior errb) | |
| 428 | 815 { |
| 816 if (NATNUMP (value)) | |
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817 { |
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818 if (BIGNUMP (value)) |
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819 { |
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820 /* hash_table_size() can't handle excessively large sizes. */ |
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821 maybe_signal_error_1 (Qargs_out_of_range, |
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822 list3 (value, Qzero, |
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823 make_integer (MOST_POSITIVE_FIXNUM)), |
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824 Qhash_table, errb); |
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825 return 0; |
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826 } |
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827 else |
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828 { |
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829 return 1; |
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830 } |
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831 } |
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832 else |
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833 { |
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834 maybe_signal_error_1 (Qwrong_type_argument, list2 (Qnatnump, value), |
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835 Qhash_table, errb); |
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836 } |
| 428 | 837 |
| 838 return 0; | |
| 839 } | |
| 840 | |
| 665 | 841 static Elemcount |
| 428 | 842 decode_hash_table_size (Lisp_Object obj) |
| 843 { | |
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844 return NILP (obj) ? HASH_TABLE_DEFAULT_SIZE : XFIXNUM (obj); |
| 428 | 845 } |
| 846 | |
| 847 static int | |
| 2286 | 848 hash_table_weakness_validate (Lisp_Object UNUSED (keyword), Lisp_Object value, |
| 578 | 849 Error_Behavior errb) |
| 428 | 850 { |
| 442 | 851 if (EQ (value, Qnil)) return 1; |
| 852 if (EQ (value, Qt)) return 1; | |
| 853 if (EQ (value, Qkey)) return 1; | |
| 854 if (EQ (value, Qkey_and_value)) return 1; | |
| 855 if (EQ (value, Qkey_or_value)) return 1; | |
| 856 if (EQ (value, Qvalue)) return 1; | |
| 428 | 857 |
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858 #ifdef NEED_TO_HANDLE_21_4_CODE |
| 428 | 859 /* Following values are obsolete as of 19990901 in xemacs-21.2 */ |
| 442 | 860 if (EQ (value, Qnon_weak)) return 1; |
| 861 if (EQ (value, Qweak)) return 1; | |
| 862 if (EQ (value, Qkey_weak)) return 1; | |
| 863 if (EQ (value, Qkey_or_value_weak)) return 1; | |
| 864 if (EQ (value, Qvalue_weak)) return 1; | |
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865 #endif |
| 428 | 866 |
| 563 | 867 maybe_invalid_constant ("Invalid hash table weakness", |
| 428 | 868 value, Qhash_table, errb); |
| 869 return 0; | |
| 870 } | |
| 871 | |
| 872 static enum hash_table_weakness | |
| 873 decode_hash_table_weakness (Lisp_Object obj) | |
| 874 { | |
| 442 | 875 if (EQ (obj, Qnil)) return HASH_TABLE_NON_WEAK; |
| 876 if (EQ (obj, Qt)) return HASH_TABLE_WEAK; | |
| 877 if (EQ (obj, Qkey_and_value)) return HASH_TABLE_WEAK; | |
| 878 if (EQ (obj, Qkey)) return HASH_TABLE_KEY_WEAK; | |
| 879 if (EQ (obj, Qkey_or_value)) return HASH_TABLE_KEY_VALUE_WEAK; | |
| 880 if (EQ (obj, Qvalue)) return HASH_TABLE_VALUE_WEAK; | |
| 428 | 881 |
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882 #ifdef NEED_TO_HANDLE_21_4_CODE |
| 428 | 883 /* Following values are obsolete as of 19990901 in xemacs-21.2 */ |
| 442 | 884 if (EQ (obj, Qnon_weak)) return HASH_TABLE_NON_WEAK; |
| 885 if (EQ (obj, Qweak)) return HASH_TABLE_WEAK; | |
| 886 if (EQ (obj, Qkey_weak)) return HASH_TABLE_KEY_WEAK; | |
| 887 if (EQ (obj, Qkey_or_value_weak)) return HASH_TABLE_KEY_VALUE_WEAK; | |
| 888 if (EQ (obj, Qvalue_weak)) return HASH_TABLE_VALUE_WEAK; | |
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889 #endif |
| 428 | 890 |
| 563 | 891 invalid_constant ("Invalid hash table weakness", obj); |
| 1204 | 892 RETURN_NOT_REACHED (HASH_TABLE_NON_WEAK); |
| 428 | 893 } |
| 894 | |
| 895 static int | |
| 2286 | 896 hash_table_test_validate (Lisp_Object UNUSED (keyword), Lisp_Object value, |
| 897 Error_Behavior errb) | |
| 428 | 898 { |
|
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899 Lisp_Object lookup; |
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900 |
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901 if (NILP (value)) |
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902 { |
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903 return 1; |
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904 } |
| 428 | 905 |
|
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906 lookup = Fassq (value, XWEAK_LIST_LIST (Vhash_table_test_weak_list)); |
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907 if (NILP (lookup)) |
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908 { |
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909 maybe_invalid_constant ("Invalid hash table test", |
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910 value, Qhash_table, errb); |
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911 } |
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|
912 |
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913 return 1; |
| 428 | 914 } |
| 915 | |
|
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916 static Lisp_Object |
| 428 | 917 decode_hash_table_test (Lisp_Object obj) |
| 918 { | |
|
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919 Lisp_Object result; |
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920 |
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921 if (NILP (obj)) |
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922 { |
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923 obj = Qeql; |
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924 } |
| 428 | 925 |
|
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926 result = Fassq (obj, XWEAK_LIST_LIST (Vhash_table_test_weak_list)); |
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927 if (NILP (result)) |
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928 { |
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929 invalid_constant ("Invalid hash table test", obj); |
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930 } |
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931 |
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932 return XCDR (result); |
| 428 | 933 } |
| 934 | |
| 935 static int | |
| 2286 | 936 hash_table_rehash_size_validate (Lisp_Object UNUSED (keyword), |
| 937 Lisp_Object value, Error_Behavior errb) | |
| 428 | 938 { |
| 939 if (!FLOATP (value)) | |
| 940 { | |
| 563 | 941 maybe_signal_error_1 (Qwrong_type_argument, list2 (Qfloatp, value), |
| 428 | 942 Qhash_table, errb); |
| 943 return 0; | |
| 944 } | |
| 945 | |
| 946 { | |
| 947 double rehash_size = XFLOAT_DATA (value); | |
| 948 if (rehash_size <= 1.0) | |
| 949 { | |
| 563 | 950 maybe_invalid_argument |
| 428 | 951 ("Hash table rehash size must be greater than 1.0", |
| 952 value, Qhash_table, errb); | |
| 953 return 0; | |
| 954 } | |
| 955 } | |
| 956 | |
| 957 return 1; | |
| 958 } | |
| 959 | |
| 960 static double | |
| 961 decode_hash_table_rehash_size (Lisp_Object rehash_size) | |
| 962 { | |
|
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963 /* -1.0 signals make_general_lisp_hash_table to use the default. */ |
| 428 | 964 return NILP (rehash_size) ? -1.0 : XFLOAT_DATA (rehash_size); |
| 965 } | |
| 966 | |
| 967 static int | |
| 2286 | 968 hash_table_rehash_threshold_validate (Lisp_Object UNUSED (keyword), |
| 969 Lisp_Object value, Error_Behavior errb) | |
| 428 | 970 { |
| 971 if (!FLOATP (value)) | |
| 972 { | |
| 563 | 973 maybe_signal_error_1 (Qwrong_type_argument, list2 (Qfloatp, value), |
| 428 | 974 Qhash_table, errb); |
| 975 return 0; | |
| 976 } | |
| 977 | |
| 978 { | |
| 979 double rehash_threshold = XFLOAT_DATA (value); | |
| 980 if (rehash_threshold <= 0.0 || rehash_threshold >= 1.0) | |
| 981 { | |
| 563 | 982 maybe_invalid_argument |
| 428 | 983 ("Hash table rehash threshold must be between 0.0 and 1.0", |
| 984 value, Qhash_table, errb); | |
| 985 return 0; | |
| 986 } | |
| 987 } | |
| 988 | |
| 989 return 1; | |
| 990 } | |
| 991 | |
| 992 static double | |
| 993 decode_hash_table_rehash_threshold (Lisp_Object rehash_threshold) | |
| 994 { | |
|
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995 /* -1.0 signals make_general_lisp_hash_table to use the default. */ |
| 428 | 996 return NILP (rehash_threshold) ? -1.0 : XFLOAT_DATA (rehash_threshold); |
| 997 } | |
| 998 | |
| 999 static int | |
| 2286 | 1000 hash_table_data_validate (Lisp_Object UNUSED (keyword), Lisp_Object value, |
| 1001 Error_Behavior errb) | |
| 428 | 1002 { |
| 1003 int len; | |
| 1004 | |
|
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1005 /* Check for improper lists while getting length. */ |
| 428 | 1006 GET_EXTERNAL_LIST_LENGTH (value, len); |
| 1007 | |
| 1008 if (len & 1) | |
| 1009 { | |
| 563 | 1010 maybe_sferror |
| 428 | 1011 ("Hash table data must have alternating key/value pairs", |
| 1012 value, Qhash_table, errb); | |
| 1013 return 0; | |
| 1014 } | |
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1015 |
| 428 | 1016 return 1; |
| 1017 } | |
| 1018 | |
| 1019 /* The actual instantiation of a hash table. This does practically no | |
| 1020 error checking, because it relies on the fact that the paranoid | |
| 1021 functions above have error-checked everything to the last details. | |
| 1022 If this assumption is wrong, we will get a crash immediately (with | |
| 1023 error-checking compiled in), and we'll know if there is a bug in | |
| 1024 the structure mechanism. So there. */ | |
| 1025 static Lisp_Object | |
| 1026 hash_table_instantiate (Lisp_Object plist) | |
| 1027 { | |
| 1028 Lisp_Object hash_table; | |
| 1029 Lisp_Object test = Qnil; | |
| 1030 Lisp_Object size = Qnil; | |
| 1031 Lisp_Object rehash_size = Qnil; | |
| 1032 Lisp_Object rehash_threshold = Qnil; | |
| 1033 Lisp_Object weakness = Qnil; | |
| 1034 Lisp_Object data = Qnil; | |
| 1035 | |
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1036 if (KEYWORDP (Fcar (plist))) |
| 428 | 1037 { |
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1038 PROPERTY_LIST_LOOP_3 (key, value, plist) |
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1039 { |
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1040 if (EQ (key, Q_test)) test = value; |
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1041 else if (EQ (key, Q_size)) size = value; |
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1042 else if (EQ (key, Q_rehash_size)) rehash_size = value; |
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1043 else if (EQ (key, Q_rehash_threshold)) rehash_threshold = value; |
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1044 else if (EQ (key, Q_weakness)) weakness = value; |
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1045 else if (EQ (key, Q_data)) data = value; |
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1046 else if (!KEYWORDP (key)) |
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1047 signal_error (Qinvalid_read_syntax, |
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1048 "can't mix keyword and non-keyword hash table syntax", |
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1049 key); |
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1050 else ABORT(); |
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1051 } |
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1052 } |
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1053 else |
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1054 { |
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1055 PROPERTY_LIST_LOOP_3 (key, value, plist) |
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1056 { |
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1057 if (EQ (key, Qtest)) test = value; |
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1058 else if (EQ (key, Qsize)) size = value; |
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1059 else if (EQ (key, Qrehash_size)) rehash_size = value; |
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1060 else if (EQ (key, Qrehash_threshold)) rehash_threshold = value; |
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1061 else if (EQ (key, Qweakness)) weakness = value; |
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1062 else if (EQ (key, Qdata)) data = value; |
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1063 #ifdef NEED_TO_HANDLE_21_4_CODE |
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1064 else if (EQ (key, Qtype))/*obsolete*/ weakness = value; |
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1065 #endif |
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1066 else if (KEYWORDP (key)) |
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1067 signal_error (Qinvalid_read_syntax, |
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1068 "can't mix keyword and non-keyword hash table syntax", |
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1069 key); |
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1070 else ABORT(); |
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1071 } |
| 428 | 1072 } |
| 1073 | |
| 1074 /* Create the hash table. */ | |
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1075 hash_table = make_general_lisp_hash_table |
| 428 | 1076 (decode_hash_table_test (test), |
| 1077 decode_hash_table_size (size), | |
| 1078 decode_hash_table_rehash_size (rehash_size), | |
| 1079 decode_hash_table_rehash_threshold (rehash_threshold), | |
| 1080 decode_hash_table_weakness (weakness)); | |
| 1081 | |
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1082 /* This can GC with a user-specified test. */ |
| 428 | 1083 { |
| 1084 struct gcpro gcpro1; | |
| 1085 GCPRO1 (hash_table); | |
| 1086 | |
| 1087 /* And fill it with data. */ | |
| 1088 while (!NILP (data)) | |
| 1089 { | |
| 1090 Lisp_Object key, value; | |
| 1091 key = XCAR (data); data = XCDR (data); | |
| 1092 value = XCAR (data); data = XCDR (data); | |
| 1093 Fputhash (key, value, hash_table); | |
| 1094 } | |
| 1095 UNGCPRO; | |
| 1096 } | |
| 1097 | |
| 1098 return hash_table; | |
| 1099 } | |
| 1100 | |
| 1101 static void | |
| 1102 structure_type_create_hash_table_structure_name (Lisp_Object structure_name) | |
| 1103 { | |
| 1104 struct structure_type *st; | |
| 1105 | |
| 1106 st = define_structure_type (structure_name, 0, hash_table_instantiate); | |
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1107 |
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1108 /* First the keyword syntax: */ |
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1109 define_structure_type_keyword (st, Q_test, hash_table_test_validate); |
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1110 define_structure_type_keyword (st, Q_size, hash_table_size_validate); |
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1111 define_structure_type_keyword (st, Q_rehash_size, hash_table_rehash_size_validate); |
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1112 define_structure_type_keyword (st, Q_rehash_threshold, hash_table_rehash_threshold_validate); |
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1113 define_structure_type_keyword (st, Q_weakness, hash_table_weakness_validate); |
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1114 define_structure_type_keyword (st, Q_data, hash_table_data_validate); |
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1115 |
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1116 #ifdef NEED_TO_HANDLE_21_4_CODE |
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1117 /* Next the mutually exclusive, older, non-keyword syntax: */ |
| 428 | 1118 define_structure_type_keyword (st, Qtest, hash_table_test_validate); |
| 1119 define_structure_type_keyword (st, Qsize, hash_table_size_validate); | |
| 1120 define_structure_type_keyword (st, Qrehash_size, hash_table_rehash_size_validate); | |
| 1121 define_structure_type_keyword (st, Qrehash_threshold, hash_table_rehash_threshold_validate); | |
| 1122 define_structure_type_keyword (st, Qweakness, hash_table_weakness_validate); | |
| 1123 define_structure_type_keyword (st, Qdata, hash_table_data_validate); | |
| 1124 | |
| 1125 /* obsolete as of 19990901 in xemacs-21.2 */ | |
| 1126 define_structure_type_keyword (st, Qtype, hash_table_weakness_validate); | |
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1127 #endif |
| 428 | 1128 } |
| 1129 | |
| 1130 /* Create a built-in Lisp structure type named `hash-table'. | |
| 1131 We make #s(hashtable ...) equivalent to #s(hash-table ...), | |
| 1132 for backward compatibility. | |
| 1133 This is called from emacs.c. */ | |
| 1134 void | |
| 1135 structure_type_create_hash_table (void) | |
| 1136 { | |
| 1137 structure_type_create_hash_table_structure_name (Qhash_table); | |
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1138 #ifdef NEED_TO_HANDLE_21_4_CODE |
| 428 | 1139 structure_type_create_hash_table_structure_name (Qhashtable); /* compat */ |
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1140 #endif |
| 428 | 1141 } |
| 1142 | |
| 1143 | |
| 1144 /************************************************************************/ | |
| 1145 /* Definition of Lisp-visible methods */ | |
| 1146 /************************************************************************/ | |
| 1147 | |
| 1148 DEFUN ("hash-table-p", Fhash_table_p, 1, 1, 0, /* | |
| 1149 Return t if OBJECT is a hash table, else nil. | |
| 1150 */ | |
| 1151 (object)) | |
| 1152 { | |
| 1153 return HASH_TABLEP (object) ? Qt : Qnil; | |
| 1154 } | |
| 1155 | |
| 1156 DEFUN ("make-hash-table", Fmake_hash_table, 0, MANY, 0, /* | |
| 1157 Return a new empty hash table object. | |
| 1158 Use Common Lisp style keywords to specify hash table properties. | |
| 1159 | |
|
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1160 Keyword :test can be `eq', `eql' (default), `equal' or `equalp'. |
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1161 Comparison between keys is done using this function. If speed is important, |
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1162 consider using `eq'. When storing strings in the hash table, you will |
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1163 likely need to use `equal' or `equalp' (for case-insensitivity). With other |
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1164 objects, consider using a test function defined with |
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1165 `define-hash-table-test', an emacs extension to this Common Lisp hash table |
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1166 API. |
| 428 | 1167 |
| 1168 Keyword :size specifies the number of keys likely to be inserted. | |
| 1169 This number of entries can be inserted without enlarging the hash table. | |
| 1170 | |
| 1171 Keyword :rehash-size must be a float greater than 1.0, and specifies | |
| 1172 the factor by which to increase the size of the hash table when enlarging. | |
| 1173 | |
| 1174 Keyword :rehash-threshold must be a float between 0.0 and 1.0, | |
| 1175 and specifies the load factor of the hash table which triggers enlarging. | |
| 1176 | |
| 442 | 1177 Non-standard keyword :weakness can be `nil' (default), `t', `key-and-value', |
| 1178 `key', `value' or `key-or-value'. `t' is an alias for `key-and-value'. | |
| 428 | 1179 |
| 442 | 1180 A key-and-value-weak hash table, also known as a fully-weak or simply |
| 1181 as a weak hash table, is one whose pointers do not count as GC | |
| 1182 referents: for any key-value pair in the hash table, if the only | |
| 1183 remaining pointer to either the key or the value is in a weak hash | |
| 1184 table, then the pair will be removed from the hash table, and the key | |
| 1185 and value collected. A non-weak hash table (or any other pointer) | |
| 1186 would prevent the object from being collected. | |
| 428 | 1187 |
| 1188 A key-weak hash table is similar to a fully-weak hash table except that | |
| 1189 a key-value pair will be removed only if the key remains unmarked | |
| 1190 outside of weak hash tables. The pair will remain in the hash table if | |
| 1191 the key is pointed to by something other than a weak hash table, even | |
| 1192 if the value is not. | |
| 1193 | |
| 1194 A value-weak hash table is similar to a fully-weak hash table except | |
| 1195 that a key-value pair will be removed only if the value remains | |
| 1196 unmarked outside of weak hash tables. The pair will remain in the | |
| 1197 hash table if the value is pointed to by something other than a weak | |
| 1198 hash table, even if the key is not. | |
| 442 | 1199 |
| 1200 A key-or-value-weak hash table is similar to a fully-weak hash table except | |
| 1201 that a key-value pair will be removed only if the value and the key remain | |
| 1202 unmarked outside of weak hash tables. The pair will remain in the | |
| 1203 hash table if the value or key are pointed to by something other than a weak | |
| 1204 hash table, even if the other is not. | |
|
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1205 |
|
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1206 arguments: (&key TEST SIZE REHASH-SIZE REHASH-THRESHOLD WEAKNESS) |
| 428 | 1207 */ |
| 1208 (int nargs, Lisp_Object *args)) | |
| 1209 { | |
|
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1210 #ifndef NEED_TO_HANDLE_21_4_CODE |
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1211 PARSE_KEYWORDS (Fmake_hash_table, nargs, args, 5, |
|
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1212 (test, size, rehash_size, rehash_threshold, weakness), |
|
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1213 NULL); |
|
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1214 #else |
|
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1215 PARSE_KEYWORDS (Fmake_hash_table, nargs, args, 6, |
|
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1216 (test, size, rehash_size, rehash_threshold, weakness, |
|
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1217 type), (type = Qunbound, weakness = Qunbound)); |
| 428 | 1218 |
|
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1219 if (EQ (weakness, Qunbound)) |
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1220 { |
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1221 if (EQ (weakness, Qunbound) && !EQ (type, Qunbound)) |
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1222 { |
|
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1223 weakness = type; |
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1224 } |
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1225 else |
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1226 { |
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1227 weakness = Qnil; |
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1228 } |
| 428 | 1229 } |
|
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1230 #endif |
| 428 | 1231 |
| 1232 #define VALIDATE_VAR(var) \ | |
| 1233 if (!NILP (var)) hash_table_##var##_validate (Q##var, var, ERROR_ME); | |
| 1234 | |
| 1235 VALIDATE_VAR (test); | |
| 1236 VALIDATE_VAR (size); | |
| 1237 VALIDATE_VAR (rehash_size); | |
| 1238 VALIDATE_VAR (rehash_threshold); | |
| 1239 VALIDATE_VAR (weakness); | |
| 1240 | |
|
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1241 return make_general_lisp_hash_table |
| 428 | 1242 (decode_hash_table_test (test), |
| 1243 decode_hash_table_size (size), | |
| 1244 decode_hash_table_rehash_size (rehash_size), | |
| 1245 decode_hash_table_rehash_threshold (rehash_threshold), | |
| 1246 decode_hash_table_weakness (weakness)); | |
| 1247 } | |
| 1248 | |
| 1249 DEFUN ("copy-hash-table", Fcopy_hash_table, 1, 1, 0, /* | |
| 1250 Return a new hash table containing the same keys and values as HASH-TABLE. | |
| 1251 The keys and values will not themselves be copied. | |
| 1252 */ | |
| 1253 (hash_table)) | |
| 1254 { | |
| 442 | 1255 const Lisp_Hash_Table *ht_old = xhash_table (hash_table); |
|
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1256 Lisp_Object obj = ALLOC_NORMAL_LISP_OBJECT (hash_table); |
|
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1257 Lisp_Hash_Table *ht = XHASH_TABLE (obj); |
|
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1258 copy_lisp_object (obj, hash_table); |
| 428 | 1259 |
|
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1260 /* We leave room for one never-occupied sentinel htentry at the end. */ |
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1261 ht->hentries = allocate_hash_table_entries (ht_old->size + 1); |
| 1204 | 1262 memcpy (ht->hentries, ht_old->hentries, (ht_old->size + 1) * sizeof (htentry)); |
| 428 | 1263 |
| 1264 if (! EQ (ht->next_weak, Qunbound)) | |
| 1265 { | |
| 1266 ht->next_weak = Vall_weak_hash_tables; | |
|
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1267 Vall_weak_hash_tables = obj; |
| 428 | 1268 } |
| 1269 | |
|
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1270 return obj; |
| 428 | 1271 } |
| 1272 | |
| 1273 static void | |
| 665 | 1274 resize_hash_table (Lisp_Hash_Table *ht, Elemcount new_size) |
| 428 | 1275 { |
| 1204 | 1276 htentry *old_entries, *new_entries, *sentinel, *e; |
| 665 | 1277 Elemcount old_size; |
|
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1278 Hash_Table_Test *http = XHASH_TABLE_TEST (ht->test); |
| 428 | 1279 |
| 1280 old_size = ht->size; | |
| 1281 ht->size = new_size; | |
| 1282 | |
| 1283 old_entries = ht->hentries; | |
| 1284 | |
|
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1285 /* We leave room for one never-occupied sentinel htentry at the end. */ |
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1286 ht->hentries = allocate_hash_table_entries (new_size + 1); |
| 428 | 1287 new_entries = ht->hentries; |
| 1288 | |
| 1289 compute_hash_table_derived_values (ht); | |
| 1290 | |
| 440 | 1291 for (e = old_entries, sentinel = e + old_size; e < sentinel; e++) |
| 1204 | 1292 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 1293 { |
|
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1294 htentry *probe = new_entries + HASHCODE (e->key, ht, http); |
| 428 | 1295 LINEAR_PROBING_LOOP (probe, new_entries, new_size) |
| 1296 ; | |
| 1297 *probe = *e; | |
| 1298 } | |
| 1299 | |
| 4117 | 1300 #ifndef NEW_GC |
| 489 | 1301 free_hentries (old_entries, old_size); |
| 4117 | 1302 #endif /* not NEW_GC */ |
| 428 | 1303 } |
| 1304 | |
| 440 | 1305 /* After a hash table has been saved to disk and later restored by the |
| 1306 portable dumper, it contains the same objects, but their addresses | |
| 665 | 1307 and thus their HASHCODEs have changed. */ |
| 428 | 1308 void |
| 440 | 1309 pdump_reorganize_hash_table (Lisp_Object hash_table) |
| 428 | 1310 { |
| 442 | 1311 const Lisp_Hash_Table *ht = xhash_table (hash_table); |
|
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1312 /* We leave room for one never-occupied sentinel htentry at the end. */ |
|
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1313 htentry *new_entries = allocate_hash_table_entries (ht->size + 1); |
| 1204 | 1314 htentry *e, *sentinel; |
|
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1315 Hash_Table_Test *http = XHASH_TABLE_TEST (ht->test); |
| 440 | 1316 |
| 1317 for (e = ht->hentries, sentinel = e + ht->size; e < sentinel; e++) | |
| 1204 | 1318 if (!HTENTRY_CLEAR_P (e)) |
| 440 | 1319 { |
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1320 htentry *probe = new_entries + HASHCODE (e->key, ht, http); |
| 440 | 1321 LINEAR_PROBING_LOOP (probe, new_entries, ht->size) |
| 1322 ; | |
| 1323 *probe = *e; | |
| 1324 } | |
| 1325 | |
| 1204 | 1326 memcpy (ht->hentries, new_entries, ht->size * sizeof (htentry)); |
| 440 | 1327 |
| 4117 | 1328 #ifndef NEW_GC |
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1329 xfree (new_entries); |
| 3092 | 1330 #endif /* not NEW_GC */ |
| 428 | 1331 } |
| 1332 | |
| 1333 static void | |
| 1334 enlarge_hash_table (Lisp_Hash_Table *ht) | |
| 1335 { | |
| 665 | 1336 Elemcount new_size = |
| 1337 hash_table_size ((Elemcount) ((double) ht->size * ht->rehash_size)); | |
| 428 | 1338 resize_hash_table (ht, new_size); |
| 1339 } | |
| 1340 | |
| 4072 | 1341 htentry * |
| 1204 | 1342 find_htentry (Lisp_Object key, const Lisp_Hash_Table *ht) |
| 428 | 1343 { |
|
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1344 Lisp_Object test = ht->test; |
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1345 Hash_Table_Test *http = XHASH_TABLE_TEST (test); |
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1346 |
| 1204 | 1347 htentry *entries = ht->hentries; |
|
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1348 htentry *probe = entries + HASHCODE (key, ht, http); |
| 428 | 1349 |
| 1350 LINEAR_PROBING_LOOP (probe, entries, ht->size) | |
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1351 if (KEYS_EQUAL_P (probe->key, key, test, http)) |
| 428 | 1352 break; |
| 1353 | |
| 1354 return probe; | |
| 1355 } | |
| 1356 | |
| 2421 | 1357 /* A version of Fputhash() that increments the value by the specified |
|
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1358 amount and dispenses with all error checks. Assumes that tables does |
| 2421 | 1359 comparison using EQ. Used by the profiling routines to avoid |
| 1360 overhead -- profiling overhead was being recorded at up to 15% of the | |
| 1361 total time. */ | |
| 1362 | |
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1363 htentry * |
| 2421 | 1364 inchash_eq (Lisp_Object key, Lisp_Object table, EMACS_INT offset) |
| 1365 { | |
| 1366 Lisp_Hash_Table *ht = XHASH_TABLE (table); | |
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1367 Hash_Table_Test *http = XHASH_TABLE_TEST (ht->test); |
| 2421 | 1368 htentry *entries = ht->hentries; |
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1369 htentry *probe = entries + HASHCODE (key, ht, http); |
| 2421 | 1370 |
| 1371 LINEAR_PROBING_LOOP (probe, entries, ht->size) | |
| 1372 if (EQ (probe->key, key)) | |
| 1373 break; | |
| 1374 | |
| 1375 if (!HTENTRY_CLEAR_P (probe)) | |
|
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1376 probe->value = make_fixnum (XFIXNUM (probe->value) + offset); |
| 2421 | 1377 else |
| 1378 { | |
| 1379 probe->key = key; | |
|
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1380 probe->value = make_fixnum (offset); |
| 2421 | 1381 |
| 1382 if (++ht->count >= ht->rehash_count) | |
|
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1383 { |
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1384 enlarge_hash_table (ht); |
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1385 return NULL; |
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1386 } |
| 2421 | 1387 } |
|
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Implement print-circle, allowing recursive and circular structures to be read.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1388 |
|
58b38d5b32d0
Implement print-circle, allowing recursive and circular structures to be read.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5520
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changeset
|
1389 return probe; |
| 2421 | 1390 } |
| 1391 | |
| 428 | 1392 DEFUN ("gethash", Fgethash, 2, 3, 0, /* |
| 1393 Find hash value for KEY in HASH-TABLE. | |
| 1394 If there is no corresponding value, return DEFAULT (which defaults to nil). | |
| 1395 */ | |
| 1396 (key, hash_table, default_)) | |
| 1397 { | |
| 442 | 1398 const Lisp_Hash_Table *ht = xhash_table (hash_table); |
| 1204 | 1399 htentry *e = find_htentry (key, ht); |
| 428 | 1400 |
| 1204 | 1401 return HTENTRY_CLEAR_P (e) ? default_ : e->value; |
| 428 | 1402 } |
| 1403 | |
| 1404 DEFUN ("puthash", Fputhash, 3, 3, 0, /* | |
|
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aae1994dfeec
Document return values for #'puthash, #'clrhash.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4398
diff
changeset
|
1405 Hash KEY to VALUE in HASH-TABLE, and return VALUE. |
| 428 | 1406 */ |
| 1407 (key, value, hash_table)) | |
| 1408 { | |
| 1409 Lisp_Hash_Table *ht = xhash_table (hash_table); | |
| 1204 | 1410 htentry *e = find_htentry (key, ht); |
| 428 | 1411 |
| 1204 | 1412 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 1413 return e->value = value; |
| 1414 | |
| 1415 e->key = key; | |
| 1416 e->value = value; | |
| 1417 | |
| 1418 if (++ht->count >= ht->rehash_count) | |
| 1419 enlarge_hash_table (ht); | |
| 1420 | |
| 1421 return value; | |
| 1422 } | |
| 1423 | |
| 1204 | 1424 /* Remove htentry pointed at by PROBE. |
| 428 | 1425 Subsequent entries are removed and reinserted. |
| 1426 We don't use tombstones - too wasteful. */ | |
| 1427 static void | |
| 1204 | 1428 remhash_1 (Lisp_Hash_Table *ht, htentry *entries, htentry *probe) |
| 428 | 1429 { |
|
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71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
parents:
5169
diff
changeset
|
1430 Hash_Table_Test *http = XHASH_TABLE_TEST (ht->test); |
| 665 | 1431 Elemcount size = ht->size; |
| 1204 | 1432 CLEAR_HTENTRY (probe); |
| 428 | 1433 probe++; |
| 1434 ht->count--; | |
| 1435 | |
| 1436 LINEAR_PROBING_LOOP (probe, entries, size) | |
| 1437 { | |
| 1438 Lisp_Object key = probe->key; | |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
parents:
5169
diff
changeset
|
1439 htentry *probe2 = entries + HASHCODE (key, ht, http); |
| 428 | 1440 LINEAR_PROBING_LOOP (probe2, entries, size) |
| 1441 if (EQ (probe2->key, key)) | |
| 1204 | 1442 /* htentry at probe doesn't need to move. */ |
| 428 | 1443 goto continue_outer_loop; |
| 1204 | 1444 /* Move htentry from probe to new home at probe2. */ |
| 428 | 1445 *probe2 = *probe; |
| 1204 | 1446 CLEAR_HTENTRY (probe); |
| 428 | 1447 continue_outer_loop: continue; |
| 1448 } | |
| 1449 } | |
| 1450 | |
| 1451 DEFUN ("remhash", Fremhash, 2, 2, 0, /* | |
| 1452 Remove the entry for KEY from HASH-TABLE. | |
| 1453 Do nothing if there is no entry for KEY in HASH-TABLE. | |
| 617 | 1454 Return non-nil if an entry was removed. |
| 428 | 1455 */ |
| 1456 (key, hash_table)) | |
| 1457 { | |
| 1458 Lisp_Hash_Table *ht = xhash_table (hash_table); | |
| 1204 | 1459 htentry *e = find_htentry (key, ht); |
| 428 | 1460 |
| 1204 | 1461 if (HTENTRY_CLEAR_P (e)) |
| 428 | 1462 return Qnil; |
| 1463 | |
| 1464 remhash_1 (ht, ht->hentries, e); | |
| 1465 return Qt; | |
| 1466 } | |
| 1467 | |
| 1468 DEFUN ("clrhash", Fclrhash, 1, 1, 0, /* | |
| 1469 Remove all entries from HASH-TABLE, leaving it empty. | |
|
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|
1470 Return HASH-TABLE. |
| 428 | 1471 */ |
| 1472 (hash_table)) | |
| 1473 { | |
| 1474 Lisp_Hash_Table *ht = xhash_table (hash_table); | |
| 1204 | 1475 htentry *e, *sentinel; |
| 428 | 1476 |
| 1477 for (e = ht->hentries, sentinel = e + ht->size; e < sentinel; e++) | |
| 1204 | 1478 CLEAR_HTENTRY (e); |
| 428 | 1479 ht->count = 0; |
| 1480 | |
| 1481 return hash_table; | |
| 1482 } | |
| 1483 | |
| 1484 /************************************************************************/ | |
| 1485 /* Accessor Functions */ | |
| 1486 /************************************************************************/ | |
| 1487 | |
| 1488 DEFUN ("hash-table-count", Fhash_table_count, 1, 1, 0, /* | |
| 1489 Return the number of entries in HASH-TABLE. | |
| 1490 */ | |
| 1491 (hash_table)) | |
| 1492 { | |
|
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|
1493 return make_fixnum (xhash_table (hash_table)->count); |
| 428 | 1494 } |
| 1495 | |
| 1496 DEFUN ("hash-table-test", Fhash_table_test, 1, 1, 0, /* | |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
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|
1497 Return HASH-TABLE's test. |
|
71ee43b8a74d
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Aidan Kehoe <kehoea@parhasard.net>
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|
1498 |
|
71ee43b8a74d
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Aidan Kehoe <kehoea@parhasard.net>
parents:
5169
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changeset
|
1499 This can be one of `eq', `eql', `equal', `equalp', or some symbol supplied |
|
71ee43b8a74d
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Aidan Kehoe <kehoea@parhasard.net>
parents:
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|
1500 as the NAME argument to `define-hash-table-test', which see. |
| 428 | 1501 */ |
| 1502 (hash_table)) | |
| 1503 { | |
|
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parents:
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|
1504 CHECK_HASH_TABLE (hash_table); |
|
71ee43b8a74d
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parents:
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diff
changeset
|
1505 return XHASH_TABLE_TEST (XHASH_TABLE (hash_table)->test)->name; |
| 428 | 1506 } |
| 1507 | |
| 1508 DEFUN ("hash-table-size", Fhash_table_size, 1, 1, 0, /* | |
| 1509 Return the size of HASH-TABLE. | |
| 1510 This is the current number of slots in HASH-TABLE, whether occupied or not. | |
| 1511 */ | |
| 1512 (hash_table)) | |
| 1513 { | |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
5560
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changeset
|
1514 return make_fixnum (xhash_table (hash_table)->size); |
| 428 | 1515 } |
| 1516 | |
| 1517 DEFUN ("hash-table-rehash-size", Fhash_table_rehash_size, 1, 1, 0, /* | |
| 1518 Return the current rehash size of HASH-TABLE. | |
| 1519 This is a float greater than 1.0; the factor by which HASH-TABLE | |
| 1520 is enlarged when the rehash threshold is exceeded. | |
| 1521 */ | |
| 1522 (hash_table)) | |
| 1523 { | |
| 1524 return make_float (xhash_table (hash_table)->rehash_size); | |
| 1525 } | |
| 1526 | |
| 1527 DEFUN ("hash-table-rehash-threshold", Fhash_table_rehash_threshold, 1, 1, 0, /* | |
| 1528 Return the current rehash threshold of HASH-TABLE. | |
| 1529 This is a float between 0.0 and 1.0; the maximum `load factor' of HASH-TABLE, | |
| 1530 beyond which the HASH-TABLE is enlarged by rehashing. | |
| 1531 */ | |
| 1532 (hash_table)) | |
| 1533 { | |
| 438 | 1534 return make_float (xhash_table (hash_table)->rehash_threshold); |
| 428 | 1535 } |
| 1536 | |
| 1537 DEFUN ("hash-table-weakness", Fhash_table_weakness, 1, 1, 0, /* | |
| 1538 Return the weakness of HASH-TABLE. | |
| 442 | 1539 This can be one of `nil', `key-and-value', `key-or-value', `key' or `value'. |
| 428 | 1540 */ |
| 1541 (hash_table)) | |
| 1542 { | |
| 1543 switch (xhash_table (hash_table)->weakness) | |
| 1544 { | |
| 442 | 1545 case HASH_TABLE_WEAK: return Qkey_and_value; |
| 1546 case HASH_TABLE_KEY_WEAK: return Qkey; | |
| 1547 case HASH_TABLE_KEY_VALUE_WEAK: return Qkey_or_value; | |
| 1548 case HASH_TABLE_VALUE_WEAK: return Qvalue; | |
| 1549 default: return Qnil; | |
| 428 | 1550 } |
| 1551 } | |
| 1552 | |
| 1553 /* obsolete as of 19990901 in xemacs-21.2 */ | |
| 1554 DEFUN ("hash-table-type", Fhash_table_type, 1, 1, 0, /* | |
| 1555 Return the type of HASH-TABLE. | |
| 1556 This can be one of `non-weak', `weak', `key-weak' or `value-weak'. | |
| 1557 */ | |
| 1558 (hash_table)) | |
| 1559 { | |
| 1560 switch (xhash_table (hash_table)->weakness) | |
| 1561 { | |
| 442 | 1562 case HASH_TABLE_WEAK: return Qweak; |
| 1563 case HASH_TABLE_KEY_WEAK: return Qkey_weak; | |
| 1564 case HASH_TABLE_KEY_VALUE_WEAK: return Qkey_or_value_weak; | |
| 1565 case HASH_TABLE_VALUE_WEAK: return Qvalue_weak; | |
| 1566 default: return Qnon_weak; | |
| 428 | 1567 } |
| 1568 } | |
| 1569 | |
| 1570 /************************************************************************/ | |
| 1571 /* Mapping Functions */ | |
| 1572 /************************************************************************/ | |
| 489 | 1573 |
| 1574 /* We need to be careful when mapping over hash tables because the | |
| 1575 hash table might be modified during the mapping operation: | |
| 1576 - by the mapping function | |
| 1577 - by gc (if the hash table is weak) | |
| 1578 | |
| 1579 So we make a copy of the hentries at the beginning of the mapping | |
| 497 | 1580 operation, and iterate over the copy. Naturally, this is |
| 1581 expensive, but not as expensive as you might think, because no | |
| 1582 actual memory has to be collected by our notoriously inefficient | |
| 1583 GC; we use an unwind-protect instead to free the memory directly. | |
| 1584 | |
| 1585 We could avoid the copying by having the hash table modifiers | |
| 1586 puthash and remhash check for currently active mapping functions. | |
| 1587 Disadvantages: it's hard to get right, and IMO hash mapping | |
| 1588 functions are basically rare, and no extra space in the hash table | |
| 1589 object and no extra cpu in puthash or remhash should be wasted to | |
| 1590 make maphash 3% faster. From a design point of view, the basic | |
| 1591 functions gethash, puthash and remhash should be implementable | |
| 1592 without having to think about maphash. | |
| 1593 | |
| 1594 Note: We don't (yet) have Common Lisp's with-hash-table-iterator. | |
| 1595 If you implement this naively, you cannot have more than one | |
| 1596 concurrently active iterator over the same hash table. The `each' | |
| 1597 function in perl has this limitation. | |
| 1598 | |
| 1599 Note: We GCPRO memory on the heap, not on the stack. There is no | |
| 1600 obvious reason why this is bad, but as of this writing this is the | |
| 1601 only known occurrence of this technique in the code. | |
| 504 | 1602 |
| 1603 -- Martin | |
| 1604 */ | |
| 1605 | |
| 1606 /* Ben disagrees with the "copying hentries" design, and says: | |
| 1607 | |
| 1608 Another solution is the same as I've already proposed -- when | |
| 1609 mapping, mark the table as "change-unsafe", and in this case, use a | |
| 1610 secondary table to maintain changes. this could be basically a | |
| 1611 standard hash table, but with entries only for added or deleted | |
| 1612 entries in the primary table, and a marker like Qunbound to | |
| 1613 indicate a deleted entry. puthash, gethash and remhash need a | |
| 1614 single extra check for this secondary table -- totally | |
| 1615 insignificant speedwise. if you really cared about making | |
| 1616 recursive maphashes completely correct, you'd have to do a bit of | |
| 1617 extra work here -- when maphashing, if the secondary table exists, | |
| 1618 make a copy of it, and use the copy in conjunction with the primary | |
| 1619 table when mapping. the advantages of this are | |
| 1620 | |
| 1621 [a] easy to demonstrate correct, even with weak hashtables. | |
| 1622 | |
| 1623 [b] no extra overhead in the general maphash case -- only when you | |
| 1624 modify the table while maphashing, and even then the overhead is | |
| 1625 very small. | |
| 497 | 1626 */ |
| 1627 | |
| 489 | 1628 static Lisp_Object |
| 1629 maphash_unwind (Lisp_Object unwind_obj) | |
| 1630 { | |
| 1631 void *ptr = (void *) get_opaque_ptr (unwind_obj); | |
|
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Ben Wing <ben@xemacs.org>
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4962
diff
changeset
|
1632 xfree (ptr); |
| 489 | 1633 free_opaque_ptr (unwind_obj); |
| 1634 return Qnil; | |
| 1635 } | |
| 1636 | |
| 1637 /* Return a malloced array of alternating key/value pairs from HT. */ | |
| 1638 static Lisp_Object * | |
| 1639 copy_compress_hentries (const Lisp_Hash_Table *ht) | |
| 1640 { | |
| 1641 Lisp_Object * const objs = | |
| 1642 /* If the hash table is empty, ht->count could be 0. */ | |
| 1643 xnew_array (Lisp_Object, 2 * (ht->count > 0 ? ht->count : 1)); | |
| 1204 | 1644 const htentry *e, *sentinel; |
| 489 | 1645 Lisp_Object *pobj; |
| 1646 | |
| 1647 for (e = ht->hentries, sentinel = e + ht->size, pobj = objs; e < sentinel; e++) | |
| 1204 | 1648 if (!HTENTRY_CLEAR_P (e)) |
| 489 | 1649 { |
| 1650 *(pobj++) = e->key; | |
| 1651 *(pobj++) = e->value; | |
| 1652 } | |
| 1653 | |
| 1654 type_checking_assert (pobj == objs + 2 * ht->count); | |
| 1655 | |
| 1656 return objs; | |
| 1657 } | |
| 1658 | |
| 428 | 1659 DEFUN ("maphash", Fmaphash, 2, 2, 0, /* |
| 1660 Map FUNCTION over entries in HASH-TABLE, calling it with two args, | |
| 1661 each key and value in HASH-TABLE. | |
| 1662 | |
| 489 | 1663 FUNCTION must not modify HASH-TABLE, with the one exception that FUNCTION |
| 428 | 1664 may remhash or puthash the entry currently being processed by FUNCTION. |
| 1665 */ | |
| 1666 (function, hash_table)) | |
| 1667 { | |
| 489 | 1668 const Lisp_Hash_Table * const ht = xhash_table (hash_table); |
| 1669 Lisp_Object * const objs = copy_compress_hentries (ht); | |
| 1670 Lisp_Object args[3]; | |
| 1671 const Lisp_Object *pobj, *end; | |
| 1672 int speccount = specpdl_depth (); | |
| 1673 struct gcpro gcpro1; | |
| 1674 | |
| 1675 record_unwind_protect (maphash_unwind, make_opaque_ptr ((void *)objs)); | |
| 1676 GCPRO1 (objs[0]); | |
| 1677 gcpro1.nvars = 2 * ht->count; | |
| 428 | 1678 |
| 489 | 1679 args[0] = function; |
| 1680 | |
| 1681 for (pobj = objs, end = pobj + 2 * ht->count; pobj < end; pobj += 2) | |
| 1682 { | |
| 1683 args[1] = pobj[0]; | |
| 1684 args[2] = pobj[1]; | |
| 1685 Ffuncall (countof (args), args); | |
| 1686 } | |
| 1687 | |
| 771 | 1688 unbind_to (speccount); |
| 489 | 1689 UNGCPRO; |
| 428 | 1690 |
| 1691 return Qnil; | |
| 1692 } | |
| 1693 | |
| 489 | 1694 /* Map *C* function FUNCTION over the elements of a non-weak lisp hash table. |
| 1695 FUNCTION must not modify HASH-TABLE, with the one exception that FUNCTION | |
| 1696 may puthash the entry currently being processed by FUNCTION. | |
| 1697 Mapping terminates if FUNCTION returns something other than 0. */ | |
| 428 | 1698 void |
| 489 | 1699 elisp_maphash_unsafe (maphash_function_t function, |
| 428 | 1700 Lisp_Object hash_table, void *extra_arg) |
| 1701 { | |
| 442 | 1702 const Lisp_Hash_Table *ht = XHASH_TABLE (hash_table); |
| 1204 | 1703 const htentry *e, *sentinel; |
| 428 | 1704 |
| 1705 for (e = ht->hentries, sentinel = e + ht->size; e < sentinel; e++) | |
| 1204 | 1706 if (!HTENTRY_CLEAR_P (e)) |
| 489 | 1707 if (function (e->key, e->value, extra_arg)) |
| 1708 return; | |
| 428 | 1709 } |
| 1710 | |
| 489 | 1711 /* Map *C* function FUNCTION over the elements of a lisp hash table. |
| 1712 It is safe for FUNCTION to modify HASH-TABLE. | |
| 1713 Mapping terminates if FUNCTION returns something other than 0. */ | |
| 1714 void | |
| 1715 elisp_maphash (maphash_function_t function, | |
| 1716 Lisp_Object hash_table, void *extra_arg) | |
| 1717 { | |
| 1718 const Lisp_Hash_Table * const ht = xhash_table (hash_table); | |
| 1719 Lisp_Object * const objs = copy_compress_hentries (ht); | |
| 1720 const Lisp_Object *pobj, *end; | |
| 1721 int speccount = specpdl_depth (); | |
| 1722 struct gcpro gcpro1; | |
| 1723 | |
| 1724 record_unwind_protect (maphash_unwind, make_opaque_ptr ((void *)objs)); | |
| 1725 GCPRO1 (objs[0]); | |
| 1726 gcpro1.nvars = 2 * ht->count; | |
| 1727 | |
| 1728 for (pobj = objs, end = pobj + 2 * ht->count; pobj < end; pobj += 2) | |
| 1729 if (function (pobj[0], pobj[1], extra_arg)) | |
| 1730 break; | |
| 1731 | |
| 771 | 1732 unbind_to (speccount); |
| 489 | 1733 UNGCPRO; |
| 1734 } | |
| 1735 | |
| 1736 /* Remove all elements of a lisp hash table satisfying *C* predicate PREDICATE. | |
| 1737 PREDICATE must not modify HASH-TABLE. */ | |
| 428 | 1738 void |
| 1739 elisp_map_remhash (maphash_function_t predicate, | |
| 1740 Lisp_Object hash_table, void *extra_arg) | |
| 1741 { | |
| 489 | 1742 const Lisp_Hash_Table * const ht = xhash_table (hash_table); |
| 1743 Lisp_Object * const objs = copy_compress_hentries (ht); | |
| 1744 const Lisp_Object *pobj, *end; | |
| 1745 int speccount = specpdl_depth (); | |
| 1746 struct gcpro gcpro1; | |
| 428 | 1747 |
| 489 | 1748 record_unwind_protect (maphash_unwind, make_opaque_ptr ((void *)objs)); |
| 1749 GCPRO1 (objs[0]); | |
| 1750 gcpro1.nvars = 2 * ht->count; | |
| 1751 | |
| 1752 for (pobj = objs, end = pobj + 2 * ht->count; pobj < end; pobj += 2) | |
| 1753 if (predicate (pobj[0], pobj[1], extra_arg)) | |
| 1754 Fremhash (pobj[0], hash_table); | |
| 1755 | |
| 771 | 1756 unbind_to (speccount); |
| 489 | 1757 UNGCPRO; |
| 428 | 1758 } |
| 1759 | |
| 1760 | |
| 1761 /************************************************************************/ | |
| 1762 /* garbage collecting weak hash tables */ | |
| 1763 /************************************************************************/ | |
| 1598 | 1764 #ifdef USE_KKCC |
| 2645 | 1765 #define MARK_OBJ(obj) do { \ |
| 1766 Lisp_Object mo_obj = (obj); \ | |
| 1767 if (!marked_p (mo_obj)) \ | |
| 1768 { \ | |
|
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|
1769 kkcc_gc_stack_push_lisp_object_0 (mo_obj); \ |
| 2645 | 1770 did_mark = 1; \ |
| 1771 } \ | |
| 1598 | 1772 } while (0) |
| 1773 | |
| 1774 #else /* NO USE_KKCC */ | |
| 1775 | |
| 442 | 1776 #define MARK_OBJ(obj) do { \ |
| 1777 Lisp_Object mo_obj = (obj); \ | |
| 1778 if (!marked_p (mo_obj)) \ | |
| 1779 { \ | |
| 1780 mark_object (mo_obj); \ | |
| 1781 did_mark = 1; \ | |
| 1782 } \ | |
| 1783 } while (0) | |
| 1598 | 1784 #endif /*NO USE_KKCC */ |
| 442 | 1785 |
| 428 | 1786 |
| 1787 /* Complete the marking for semi-weak hash tables. */ | |
| 1788 int | |
| 1789 finish_marking_weak_hash_tables (void) | |
| 1790 { | |
| 1791 Lisp_Object hash_table; | |
| 1792 int did_mark = 0; | |
| 1793 | |
| 1794 for (hash_table = Vall_weak_hash_tables; | |
| 1795 !NILP (hash_table); | |
| 1796 hash_table = XHASH_TABLE (hash_table)->next_weak) | |
| 1797 { | |
| 442 | 1798 const Lisp_Hash_Table *ht = XHASH_TABLE (hash_table); |
| 1204 | 1799 const htentry *e = ht->hentries; |
| 1800 const htentry *sentinel = e + ht->size; | |
| 428 | 1801 |
| 1802 if (! marked_p (hash_table)) | |
| 1803 /* The hash table is probably garbage. Ignore it. */ | |
| 1804 continue; | |
| 1805 | |
| 1806 /* Now, scan over all the pairs. For all pairs that are | |
| 1807 half-marked, we may need to mark the other half if we're | |
| 1808 keeping this pair. */ | |
| 1809 switch (ht->weakness) | |
| 1810 { | |
| 1811 case HASH_TABLE_KEY_WEAK: | |
| 1812 for (; e < sentinel; e++) | |
| 1204 | 1813 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 1814 if (marked_p (e->key)) |
| 1815 MARK_OBJ (e->value); | |
| 1816 break; | |
| 1817 | |
| 1818 case HASH_TABLE_VALUE_WEAK: | |
| 1819 for (; e < sentinel; e++) | |
| 1204 | 1820 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 1821 if (marked_p (e->value)) |
| 1822 MARK_OBJ (e->key); | |
| 1823 break; | |
| 1824 | |
| 442 | 1825 case HASH_TABLE_KEY_VALUE_WEAK: |
| 1826 for (; e < sentinel; e++) | |
| 1204 | 1827 if (!HTENTRY_CLEAR_P (e)) |
| 442 | 1828 { |
| 1829 if (marked_p (e->value)) | |
| 1830 MARK_OBJ (e->key); | |
| 1831 else if (marked_p (e->key)) | |
| 1832 MARK_OBJ (e->value); | |
| 1833 } | |
| 1834 break; | |
| 1835 | |
| 428 | 1836 case HASH_TABLE_KEY_CAR_WEAK: |
| 1837 for (; e < sentinel; e++) | |
| 1204 | 1838 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 1839 if (!CONSP (e->key) || marked_p (XCAR (e->key))) |
| 1840 { | |
| 1841 MARK_OBJ (e->key); | |
| 1842 MARK_OBJ (e->value); | |
| 1843 } | |
| 1844 break; | |
| 1845 | |
| 450 | 1846 /* We seem to be sprouting new weakness types at an alarming |
| 1847 rate. At least this is not externally visible - and in | |
| 1848 fact all of these KEY_CAR_* types are only used by the | |
| 1849 glyph code. */ | |
| 1850 case HASH_TABLE_KEY_CAR_VALUE_WEAK: | |
| 1851 for (; e < sentinel; e++) | |
| 1204 | 1852 if (!HTENTRY_CLEAR_P (e)) |
| 450 | 1853 { |
| 1854 if (!CONSP (e->key) || marked_p (XCAR (e->key))) | |
| 1855 { | |
| 1856 MARK_OBJ (e->key); | |
| 1857 MARK_OBJ (e->value); | |
| 1858 } | |
| 1859 else if (marked_p (e->value)) | |
| 1860 MARK_OBJ (e->key); | |
| 1861 } | |
| 1862 break; | |
| 1863 | |
| 428 | 1864 case HASH_TABLE_VALUE_CAR_WEAK: |
| 1865 for (; e < sentinel; e++) | |
| 1204 | 1866 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 1867 if (!CONSP (e->value) || marked_p (XCAR (e->value))) |
| 1868 { | |
| 1869 MARK_OBJ (e->key); | |
| 1870 MARK_OBJ (e->value); | |
| 1871 } | |
| 1872 break; | |
| 1873 | |
| 1874 default: | |
| 1875 break; | |
| 1876 } | |
| 1877 } | |
| 1878 | |
| 1879 return did_mark; | |
| 1880 } | |
| 1881 | |
| 1882 void | |
| 1883 prune_weak_hash_tables (void) | |
| 1884 { | |
| 1885 Lisp_Object hash_table, prev = Qnil; | |
| 1886 for (hash_table = Vall_weak_hash_tables; | |
| 1887 !NILP (hash_table); | |
| 1888 hash_table = XHASH_TABLE (hash_table)->next_weak) | |
| 1889 { | |
| 1890 if (! marked_p (hash_table)) | |
| 1891 { | |
| 1892 /* This hash table itself is garbage. Remove it from the list. */ | |
| 1893 if (NILP (prev)) | |
| 1894 Vall_weak_hash_tables = XHASH_TABLE (hash_table)->next_weak; | |
| 1895 else | |
| 1896 XHASH_TABLE (prev)->next_weak = XHASH_TABLE (hash_table)->next_weak; | |
| 1897 } | |
| 1898 else | |
| 1899 { | |
| 1900 /* Now, scan over all the pairs. Remove all of the pairs | |
| 1901 in which the key or value, or both, is unmarked | |
| 1902 (depending on the weakness of the hash table). */ | |
| 1903 Lisp_Hash_Table *ht = XHASH_TABLE (hash_table); | |
| 1204 | 1904 htentry *entries = ht->hentries; |
| 1905 htentry *sentinel = entries + ht->size; | |
| 1906 htentry *e; | |
| 428 | 1907 |
| 1908 for (e = entries; e < sentinel; e++) | |
| 1204 | 1909 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 1910 { |
| 1911 again: | |
| 1912 if (!marked_p (e->key) || !marked_p (e->value)) | |
| 1913 { | |
| 1914 remhash_1 (ht, entries, e); | |
| 1204 | 1915 if (!HTENTRY_CLEAR_P (e)) |
| 428 | 1916 goto again; |
| 1917 } | |
| 1918 } | |
| 1919 | |
| 1920 prev = hash_table; | |
| 1921 } | |
| 1922 } | |
| 1923 } | |
| 1924 | |
| 1925 /* Return a hash value for an array of Lisp_Objects of size SIZE. */ | |
| 1926 | |
| 665 | 1927 Hashcode |
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1928 internal_array_hash (Lisp_Object *arr, int size, int depth, Boolint equalp) |
| 428 | 1929 { |
| 1930 int i; | |
| 665 | 1931 Hashcode hash = 0; |
| 442 | 1932 depth++; |
| 428 | 1933 |
| 1934 if (size <= 5) | |
| 1935 { | |
| 1936 for (i = 0; i < size; i++) | |
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1937 hash = HASH2 (hash, internal_hash (arr[i], depth, equalp)); |
| 428 | 1938 return hash; |
| 1939 } | |
| 1940 | |
| 1941 /* just pick five elements scattered throughout the array. | |
| 1942 A slightly better approach would be to offset by some | |
| 1943 noise factor from the points chosen below. */ | |
| 1944 for (i = 0; i < 5; i++) | |
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1945 hash = HASH2 (hash, internal_hash (arr[i*size/5], depth, equalp)); |
| 428 | 1946 |
| 1947 return hash; | |
| 1948 } | |
| 1949 | |
|
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1950 /* This needs to be algorithmically the same as |
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1951 internal_array_hash(). Unfortunately, for strings with non-ASCII content, |
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1952 it has to be O(2N), I don't see a reasonable alternative to hashing |
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1953 sequence relying on their length. It is O(1) for pure ASCII strings, |
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1954 though. */ |
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1955 |
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1956 static Hashcode |
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1957 string_equalp_hash (Lisp_Object string) |
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1958 { |
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1959 Bytecount len = XSTRING_LENGTH (string), |
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1960 ascii_begin = (Bytecount) XSTRING_ASCII_BEGIN (string); |
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1961 const Ibyte *ptr = XSTRING_DATA (string), *pend = ptr + len; |
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1962 Charcount clen; |
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1963 Hashcode hash = 0; |
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1964 |
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1965 if (len == ascii_begin) |
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1966 { |
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1967 clen = len; |
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1968 } |
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1969 else |
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1970 { |
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1971 clen = string_char_length (string); |
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1972 } |
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1973 |
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1974 if (clen <= 5) |
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1975 { |
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1976 while (ptr < pend) |
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1977 { |
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1978 hash = HASH2 (hash, |
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1979 LISP_HASH (make_char (CANONCASE (NULL, |
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1980 itext_ichar (ptr))))); |
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1981 INC_IBYTEPTR (ptr); |
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1982 } |
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1983 } |
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1984 else |
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1985 { |
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1986 int ii; |
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1987 |
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1988 if (clen == len) |
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1989 { |
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1990 for (ii = 0; ii < 5; ii++) |
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1991 { |
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1992 hash = HASH2 (hash, |
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1993 LISP_HASH (make_char |
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1994 (CANONCASE (NULL, |
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1995 ptr[ii * clen / 5])))); |
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1996 } |
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1997 } |
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1998 else |
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1999 { |
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2000 Charcount this_char = 0, last_char = 0; |
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2001 for (ii = 0; ii < 5; ii++) |
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2002 { |
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2003 this_char = ii * clen / 5; |
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2004 ptr = itext_n_addr (ptr, this_char - last_char); |
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2005 last_char = this_char; |
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2006 |
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2007 hash = HASH2 (hash, |
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2008 LISP_HASH (make_char |
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2009 (CANONCASE (NULL, itext_ichar (ptr))))); |
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2010 } |
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2011 } |
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2012 } |
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2013 |
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2014 return HASH2 (clen, hash); |
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2015 } |
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2016 |
| 428 | 2017 /* Return a hash value for a Lisp_Object. This is for use when hashing |
| 2018 objects with the comparison being `equal' (for `eq', you can just | |
| 2019 use the Lisp_Object itself as the hash value). You need to make a | |
| 2020 tradeoff between the speed of the hash function and how good the | |
| 2021 hashing is. In particular, the hash function needs to be FAST, | |
| 2022 so you can't just traipse down the whole tree hashing everything | |
| 2023 together. Most of the time, objects will differ in the first | |
| 2024 few elements you hash. Thus, we only go to a short depth (5) | |
| 2025 and only hash at most 5 elements out of a vector. Theoretically | |
| 2026 we could still take 5^5 time (a big big number) to compute a | |
| 2027 hash, but practically this won't ever happen. */ | |
| 2028 | |
| 665 | 2029 Hashcode |
|
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2030 internal_hash (Lisp_Object obj, int depth, Boolint equalp) |
| 428 | 2031 { |
| 2032 if (depth > 5) | |
| 2033 return 0; | |
|
4398
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2034 |
|
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changeset
|
2035 if (CONSP (obj)) |
| 428 | 2036 { |
|
4398
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2037 Hashcode hash, h; |
|
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2038 int s; |
|
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2039 |
|
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2040 depth += 1; |
|
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2041 |
|
5193
41ac827cb71b
fix cygwin compile, fix warning and style in elhash.c
Ben Wing <ben@xemacs.org>
parents:
5191
diff
changeset
|
2042 if (!CONSP (XCDR (obj))) |
|
4398
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2043 { |
|
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2044 /* special case for '(a . b) conses */ |
|
5193
41ac827cb71b
fix cygwin compile, fix warning and style in elhash.c
Ben Wing <ben@xemacs.org>
parents:
5191
diff
changeset
|
2045 return HASH2 (internal_hash (XCAR(obj), depth, equalp), |
|
41ac827cb71b
fix cygwin compile, fix warning and style in elhash.c
Ben Wing <ben@xemacs.org>
parents:
5191
diff
changeset
|
2046 internal_hash (XCDR (obj), depth, equalp)); |
|
4398
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2047 } |
|
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2048 |
|
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2049 /* Don't simply tail recurse; we want to hash lists with the |
|
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4117
diff
changeset
|
2050 same contents in distinct orders differently. */ |
|
5193
41ac827cb71b
fix cygwin compile, fix warning and style in elhash.c
Ben Wing <ben@xemacs.org>
parents:
5191
diff
changeset
|
2051 hash = internal_hash (XCAR (obj), depth, equalp); |
|
4398
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
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4117
diff
changeset
|
2052 |
|
5193
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fix cygwin compile, fix warning and style in elhash.c
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
2053 obj = XCDR (obj); |
|
41ac827cb71b
fix cygwin compile, fix warning and style in elhash.c
Ben Wing <ben@xemacs.org>
parents:
5191
diff
changeset
|
2054 for (s = 1; s < 6 && CONSP (obj); obj = XCDR (obj), s++) |
|
4398
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
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4117
diff
changeset
|
2055 { |
|
5193
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fix cygwin compile, fix warning and style in elhash.c
Ben Wing <ben@xemacs.org>
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changeset
|
2056 h = internal_hash (XCAR (obj), depth, equalp); |
|
41ac827cb71b
fix cygwin compile, fix warning and style in elhash.c
Ben Wing <ben@xemacs.org>
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diff
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|
2057 hash = HASH3 (hash, h, s); |
|
4398
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Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2058 } |
|
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
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4117
diff
changeset
|
2059 |
|
479443c0f95a
Have list hashes depend on the order of the contents, as is the case for vectors.
Aidan Kehoe <kehoea@parhasard.net>
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4117
diff
changeset
|
2060 return hash; |
| 428 | 2061 } |
| 2062 if (STRINGP (obj)) | |
| 2063 { | |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2064 if (equalp) |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2065 { |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2066 return string_equalp_hash (obj); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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changeset
|
2067 } |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2068 |
| 428 | 2069 return hash_string (XSTRING_DATA (obj), XSTRING_LENGTH (obj)); |
| 2070 } | |
| 2071 if (LRECORDP (obj)) | |
| 2072 { | |
| 442 | 2073 const struct lrecord_implementation |
| 428 | 2074 *imp = XRECORD_LHEADER_IMPLEMENTATION (obj); |
| 2075 if (imp->hash) | |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2076 return imp->hash (obj, depth, equalp); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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changeset
|
2077 } |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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changeset
|
2078 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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changeset
|
2079 if (equalp) |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2080 { |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2081 if (CHARP (obj)) |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2082 { |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
2083 /* Characters and numbers of the same numeric value hash |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2084 differently, which is fine, they're not equalp. */ |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2085 return LISP_HASH (make_char (CANONCASE (NULL, XCHAR (obj)))); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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changeset
|
2086 } |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
parents:
5169
diff
changeset
|
2087 |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5560
diff
changeset
|
2088 if (FIXNUMP (obj)) |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2089 { |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
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5560
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|
2090 return FLOAT_HASHCODE_FROM_DOUBLE ((double) (XFIXNUM (obj))); |
|
5191
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2091 } |
| 428 | 2092 } |
| 2093 | |
| 2094 return LISP_HASH (obj); | |
| 2095 } | |
| 2096 | |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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changeset
|
2097 DEFUN ("eq-hash", Feq_hash, 1, 1, 0, /* |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2098 Return a hash value for OBJECT appropriate for use with `eq.' |
|
5520
05c1ad4f7a7b
Expand the documentation of #'eq-hash, mention the CL PRINT-OBJECT protocol
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
2099 |
|
05c1ad4f7a7b
Expand the documentation of #'eq-hash, mention the CL PRINT-OBJECT protocol
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
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|
2100 If OBJECT is not immediate (it is not a fixnum or character) this hash value |
|
05c1ad4f7a7b
Expand the documentation of #'eq-hash, mention the CL PRINT-OBJECT protocol
Aidan Kehoe <kehoea@parhasard.net>
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5474
diff
changeset
|
2101 will be unique among currently-reachable objects, and is appropriate for |
|
05c1ad4f7a7b
Expand the documentation of #'eq-hash, mention the CL PRINT-OBJECT protocol
Aidan Kehoe <kehoea@parhasard.net>
parents:
5474
diff
changeset
|
2102 implementing the Common Lisp PRINT-OBJECT protocol. |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2103 */ |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2104 (object)) |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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|
2105 { |
|
5193
41ac827cb71b
fix cygwin compile, fix warning and style in elhash.c
Ben Wing <ben@xemacs.org>
parents:
5191
diff
changeset
|
2106 return make_integer ((EMACS_INT) XPNTRVAL (object)); |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2107 } |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
parents:
5169
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|
2108 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
parents:
5169
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changeset
|
2109 DEFUN ("eql-hash", Feql_hash, 1, 1, 0, /* |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
parents:
5169
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changeset
|
2110 Return a hash value for OBJECT appropriate for use with `eql.' |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2111 */ |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2112 (object)) |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2113 { |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
parents:
5169
diff
changeset
|
2114 EMACS_INT hashed = lisp_object_eql_hash (NULL, object); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
diff
changeset
|
2115 return make_integer (hashed); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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|
2116 } |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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changeset
|
2117 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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changeset
|
2118 DEFUN ("equal-hash", Fequal_hash, 1, 1, 0, /* |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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5169
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changeset
|
2119 Return a hash value for OBJECT appropriate for use with `equal.' |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2120 \(equal obj1 obj2) implies (= (equal-hash obj1) (equal-hash obj2)). |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2121 */ |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2122 (object)) |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2123 { |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2124 EMACS_INT hashed = internal_hash (object, 0, 0); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2125 return make_integer (hashed); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2126 } |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2127 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2128 DEFUN ("equalp-hash", Fequalp_hash, 1, 1, 0, /* |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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changeset
|
2129 Return a hash value for OBJECT appropriate for use with `equalp.' |
| 428 | 2130 */ |
| 2131 (object)) | |
| 2132 { | |
|
5191
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2133 EMACS_INT hashed = internal_hash (object, 0, 1); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2134 return make_integer (hashed); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2135 } |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2136 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2137 static Lisp_Object |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2138 make_hash_table_test (Lisp_Object name, |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2139 hash_table_equal_function_t equal_function, |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2140 hash_table_hash_function_t hash_function, |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2141 Lisp_Object lisp_equal_function, |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2142 Lisp_Object lisp_hash_function) |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2143 { |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
2144 Lisp_Object result = ALLOC_NORMAL_LISP_OBJECT (hash_table_test); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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changeset
|
2145 Hash_Table_Test *http = XHASH_TABLE_TEST (result); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2146 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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2147 http->name = name; |
|
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|
2148 http->equal_function = equal_function; |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2149 http->hash_function = hash_function; |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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2150 http->lisp_equal_function = lisp_equal_function; |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2151 http->lisp_hash_function = lisp_hash_function; |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2152 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2153 return result; |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2154 } |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2155 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2156 Lisp_Object |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2157 define_hash_table_test (Lisp_Object name, |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2158 hash_table_equal_function_t equal_function, |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2159 hash_table_hash_function_t hash_function, |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2160 Lisp_Object lisp_equal_function, |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2161 Lisp_Object lisp_hash_function) |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2162 { |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2163 Lisp_Object result = make_hash_table_test (name, equal_function, |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2164 hash_function, |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2165 lisp_equal_function, |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2166 lisp_hash_function); |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2167 XWEAK_LIST_LIST (Vhash_table_test_weak_list) |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2168 = Fcons (Fcons (name, result), |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2169 XWEAK_LIST_LIST (Vhash_table_test_weak_list)); |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2170 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2171 return result; |
| 428 | 2172 } |
| 2173 | |
|
5191
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|
2174 DEFUN ("define-hash-table-test", Fdefine_hash_table_test, 3, 3, 0, /* |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2175 Define a new hash table test with name NAME, a symbol. |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2176 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2177 In a hash table created with NAME as its test, use EQUAL-FUNCTION to compare |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2178 keys, and HASH-FUNCTION for computing hash codes of keys. |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2179 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2180 EQUAL-FUNCTION must be a function taking two arguments and returning non-nil |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2181 if both arguments are the same. HASH-FUNCTION must be a function taking one |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2182 argument and returning an integer that is the hash code of the argument. |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2183 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2184 Computation should use the whole value range of the underlying machine long |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2185 type. In XEmacs this will necessitate bignums for values above |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2186 `most-positive-fixnum' but below (1+ (* most-positive-fixnum 2)) and |
|
5384
3889ef128488
Fix misspelled words, and some grammar, across the entire source tree.
Jerry James <james@xemacs.org>
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5320
diff
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|
2187 analogous values below `most-negative-fixnum'. Relatively poor hashing |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2188 performance is guaranteed in a build without bignums. |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2189 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2190 This function returns t if successful, and errors if NAME |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2191 cannot be defined as a hash table test. |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2192 */ |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2193 (name, equal_function, hash_function)) |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2194 { |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2195 Lisp_Object min, max, lookup; |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2196 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2197 CHECK_SYMBOL (name); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2198 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2199 lookup = Fassq (name, XWEAK_LIST_LIST (Vhash_table_test_weak_list)); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2200 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2201 if (!NILP (lookup)) |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2202 { |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2203 invalid_change ("Cannot redefine existing hash table test", name); |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2204 } |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2205 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2206 min = Ffunction_min_args (equal_function); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2207 max = Ffunction_max_args (equal_function); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2208 |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
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5560
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|
2209 if (!((XFIXNUM (min) <= 2) && (NILP (max) || 2 <= XFIXNUM (max)))) |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2210 { |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2211 signal_wrong_number_of_arguments_error (equal_function, 2); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2212 } |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2213 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2214 min = Ffunction_min_args (hash_function); |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2215 max = Ffunction_max_args (hash_function); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2216 |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
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|
2217 if (!((XFIXNUM (min) <= 1) && (NILP (max) || 1 <= XFIXNUM (max)))) |
|
5191
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2218 { |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2219 signal_wrong_number_of_arguments_error (hash_function, 1); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2220 } |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2221 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2222 define_hash_table_test (name, lisp_object_general_equal, |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2223 lisp_object_general_hash, equal_function, |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2224 hash_function); |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2225 return Qt; |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2226 } |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2227 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2228 DEFUN ("valid-hash-table-test-p", Fvalid_hash_table_test_p, 1, 1, 0, /* |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2229 Return t if OBJECT names a hash table test, nil otherwise. |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2230 |
|
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|
2231 A valid hash table test is one of the symbols `eq', `eql', `equal', |
|
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|
2232 `equalp', or some symbol passed as the NAME argument to |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2233 `define-hash-table-test'. As a special case, `nil' is regarded as |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2234 equivalent to `eql'. |
| 428 | 2235 */ |
| 2236 (object)) | |
| 2237 { | |
|
5191
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|
2238 Lisp_Object lookup; |
|
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|
2239 |
|
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|
2240 if (NILP (object)) |
|
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|
2241 { |
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|
2242 return Qt; |
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2243 } |
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2244 |
|
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2245 lookup = Fassq (object, XWEAK_LIST_LIST (Vhash_table_test_weak_list)); |
|
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2246 |
|
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2247 if (!NILP (lookup)) |
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2248 { |
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2249 return Qt; |
|
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2250 } |
|
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2251 |
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2252 return Qnil; |
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2253 } |
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|
2254 |
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|
2255 DEFUN ("hash-table-test-list", Fhash_table_test_list, 0, 0, 0, /* |
|
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2256 Return a list of symbols naming valid hash table tests. |
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2257 These can be passed as the value of the TEST keyword to `make-hash-table'. |
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2258 This list does not include nil, regarded as equivalent to `eql' by |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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2259 `make-hash-table'. |
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2260 */ |
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2261 ()) |
|
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2262 { |
|
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2263 Lisp_Object result = Qnil; |
|
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2264 |
|
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2265 LIST_LOOP_2 (test, XWEAK_LIST_LIST (Vhash_table_test_weak_list)) |
|
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2266 { |
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2267 if (!UNBOUNDP (XCAR (test))) |
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2268 { |
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2269 result = Fcons (XCAR (test), result); |
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2270 } |
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2271 } |
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2272 |
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2273 return result; |
| 428 | 2274 } |
|
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2275 |
|
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2276 DEFUN ("hash-table-test-equal-function", |
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2277 Fhash_table_test_equal_function, 1, 1, 0, /* |
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2278 Return the comparison function used for hash table test TEST. |
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2279 See `define-hash-table-test' and `make-hash-table'. |
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2280 */ |
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2281 (test)) |
|
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2282 { |
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2283 Lisp_Object lookup; |
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2284 |
|
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2285 if (NILP (test)) |
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2286 { |
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2287 test = Qeql; |
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2288 } |
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2289 |
|
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2290 lookup = Fassq (test, XWEAK_LIST_LIST (Vhash_table_test_weak_list)); |
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2291 if (NILP (lookup)) |
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2292 { |
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2293 invalid_argument ("Not a defined hash table test", test); |
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2294 } |
| 428 | 2295 |
|
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2296 return XHASH_TABLE_TEST (XCDR (lookup))->lisp_equal_function; |
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2297 } |
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2298 |
|
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2299 DEFUN ("hash-table-test-hash-function", |
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2300 Fhash_table_test_hash_function, 1, 1, 0, /* |
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2301 Return the hash function used for hash table test TEST. |
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2302 See `define-hash-table-test' and `make-hash-table'. |
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2303 */ |
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2304 (test)) |
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2305 { |
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2306 Lisp_Object lookup; |
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2307 |
|
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2308 if (NILP (test)) |
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2309 { |
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|
2310 test = Qeql; |
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2311 } |
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|
2312 |
|
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|
2313 lookup = Fassq (test, XWEAK_LIST_LIST (Vhash_table_test_weak_list)); |
|
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2314 if (NILP (lookup)) |
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2315 { |
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|
2316 invalid_argument ("Not a defined hash table test", test); |
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2317 } |
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|
2318 |
|
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2319 return XHASH_TABLE_TEST (XCDR (lookup))->lisp_hash_function; |
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2320 } |
| 428 | 2321 |
| 2322 /************************************************************************/ | |
| 2323 /* initialization */ | |
| 2324 /************************************************************************/ | |
| 2325 | |
| 2326 void | |
|
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|
2327 hash_table_objects_create (void) |
|
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|
2328 { |
|
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|
2329 #ifdef MEMORY_USAGE_STATS |
|
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|
2330 OBJECT_HAS_METHOD (hash_table, memory_usage); |
|
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|
2331 #endif |
|
5560
58b38d5b32d0
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|
2332 OBJECT_HAS_METHOD (hash_table, print_preprocess); |
|
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|
2333 OBJECT_HAS_METHOD (hash_table, nsubst_structures_descend); |
|
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|
2334 } |
|
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|
2335 |
|
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|
2336 void |
| 428 | 2337 syms_of_elhash (void) |
| 2338 { | |
| 2339 DEFSUBR (Fhash_table_p); | |
| 2340 DEFSUBR (Fmake_hash_table); | |
| 2341 DEFSUBR (Fcopy_hash_table); | |
| 2342 DEFSUBR (Fgethash); | |
| 2343 DEFSUBR (Fremhash); | |
| 2344 DEFSUBR (Fputhash); | |
| 2345 DEFSUBR (Fclrhash); | |
| 2346 DEFSUBR (Fmaphash); | |
| 2347 DEFSUBR (Fhash_table_count); | |
| 2348 DEFSUBR (Fhash_table_test); | |
| 2349 DEFSUBR (Fhash_table_size); | |
| 2350 DEFSUBR (Fhash_table_rehash_size); | |
| 2351 DEFSUBR (Fhash_table_rehash_threshold); | |
| 2352 DEFSUBR (Fhash_table_weakness); | |
| 2353 DEFSUBR (Fhash_table_type); /* obsolete */ | |
|
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|
2354 |
|
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|
2355 DEFSUBR (Feq_hash); |
|
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|
2356 DEFSUBR (Feql_hash); |
|
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|
2357 DEFSUBR (Fequal_hash); |
|
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|
2358 Ffset (intern ("sxhash"), intern ("equal-hash")); |
|
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|
2359 DEFSUBR (Fequalp_hash); |
|
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2360 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2361 DEFSUBR (Fdefine_hash_table_test); |
|
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|
2362 DEFSUBR (Fvalid_hash_table_test_p); |
|
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2363 DEFSUBR (Fhash_table_test_list); |
|
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|
2364 DEFSUBR (Fhash_table_test_equal_function); |
|
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|
2365 DEFSUBR (Fhash_table_test_hash_function); |
| 428 | 2366 |
| 563 | 2367 DEFSYMBOL_MULTIWORD_PREDICATE (Qhash_tablep); |
|
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2368 |
| 563 | 2369 DEFSYMBOL (Qhash_table); |
| 2370 DEFSYMBOL (Qhashtable); | |
|
5084
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
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|
2371 DEFSYMBOL (Qmake_hash_table); |
| 563 | 2372 DEFSYMBOL (Qweakness); |
| 2373 DEFSYMBOL (Qvalue); | |
| 2374 DEFSYMBOL (Qkey_or_value); | |
| 2375 DEFSYMBOL (Qkey_and_value); | |
| 2376 DEFSYMBOL (Qrehash_size); | |
| 2377 DEFSYMBOL (Qrehash_threshold); | |
| 428 | 2378 |
| 563 | 2379 DEFSYMBOL (Qweak); /* obsolete */ |
| 2380 DEFSYMBOL (Qkey_weak); /* obsolete */ | |
| 2381 DEFSYMBOL (Qkey_or_value_weak); /* obsolete */ | |
| 2382 DEFSYMBOL (Qvalue_weak); /* obsolete */ | |
| 2383 DEFSYMBOL (Qnon_weak); /* obsolete */ | |
| 428 | 2384 |
|
4820
e6dec75ded0e
Use keywords, not ordinary symbols, in the structure syntax for hash tables.
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|
2385 DEFKEYWORD (Q_data); |
| 563 | 2386 DEFKEYWORD (Q_size); |
| 2387 DEFKEYWORD (Q_rehash_size); | |
| 2388 DEFKEYWORD (Q_rehash_threshold); | |
| 2389 DEFKEYWORD (Q_weakness); | |
| 428 | 2390 } |
| 2391 | |
| 2392 void | |
|
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|
2393 vars_of_elhash (void) |
|
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2394 { |
|
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2395 Lisp_Object weak_list_list = XWEAK_LIST_LIST (Vhash_table_test_weak_list); |
|
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|
2396 |
|
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|
2397 /* This var was staticpro'd and initialised in |
|
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|
2398 init_elhash_once_early, but its Vall_weak_lists isn't sane, since |
|
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|
2399 that was done before vars_of_data() was called. Create a sane |
|
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|
2400 weak list object now, set its list appropriately, assert that our |
|
71ee43b8a74d
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|
2401 data haven't been garbage collected. */ |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2402 assert (!NILP (Fassq (Qeq, weak_list_list))); |
|
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|
2403 assert (!NILP (Fassq (Qeql, weak_list_list))); |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2404 assert (!NILP (Fassq (Qequal, weak_list_list))); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2405 assert (!NILP (Fassq (Qequalp, weak_list_list))); |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
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5560
diff
changeset
|
2406 assert (4 == XFIXNUM (Flength (weak_list_list))); |
|
5191
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|
2407 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2408 Vhash_table_test_weak_list = make_weak_list (WEAK_LIST_KEY_ASSOC); |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
2409 XWEAK_LIST_LIST (Vhash_table_test_weak_list) = weak_list_list; |
|
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|
2410 |
|
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|
2411 #ifdef MEMORY_USAGE_STATS |
|
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|
2412 OBJECT_HAS_PROPERTY |
|
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|
2413 (hash_table, memusage_stats_list, list1 (intern ("hash-entries"))); |
|
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|
2414 #endif /* MEMORY_USAGE_STATS */ |
|
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|
2415 } |
|
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|
2416 |
|
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|
2417 void |
| 771 | 2418 init_elhash_once_early (void) |
| 428 | 2419 { |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3017
diff
changeset
|
2420 INIT_LISP_OBJECT (hash_table); |
|
5191
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|
2421 INIT_LISP_OBJECT (hash_table_test); |
|
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|
2422 |
| 3092 | 2423 #ifdef NEW_GC |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
2424 INIT_LISP_OBJECT (hash_table_entry); |
| 3092 | 2425 #endif /* NEW_GC */ |
| 771 | 2426 |
|
5191
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2427 /* init_elhash_once_early() is called very early, we can't have these |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2428 DEFSYMBOLs in syms_of_elhash(), unfortunately. */ |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
Aidan Kehoe <kehoea@parhasard.net>
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|
2429 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2430 DEFSYMBOL (Qeq); |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2431 DEFSYMBOL (Qeql); |
|
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|
2432 DEFSYMBOL (Qequal); |
|
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|
2433 DEFSYMBOL (Qequalp); |
|
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|
2434 |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2435 DEFSYMBOL (Qeq_hash); |
|
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|
2436 DEFSYMBOL (Qeql_hash); |
|
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|
2437 DEFSYMBOL (Qequal_hash); |
|
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|
2438 DEFSYMBOL (Qequalp_hash); |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2439 |
| 428 | 2440 /* This must NOT be staticpro'd */ |
| 2441 Vall_weak_hash_tables = Qnil; | |
| 452 | 2442 dump_add_weak_object_chain (&Vall_weak_hash_tables); |
|
5191
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|
2443 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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changeset
|
2444 staticpro (&Vhash_table_test_weak_list); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2445 Vhash_table_test_weak_list = make_weak_list (WEAK_LIST_KEY_ASSOC); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2446 |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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changeset
|
2447 staticpro (&Vhash_table_test_eq); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2448 Vhash_table_test_eq = define_hash_table_test (Qeq, NULL, NULL, Qeq, Qeq_hash); |
|
71ee43b8a74d
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|
2449 staticpro (&Vhash_table_test_eql); |
|
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|
2450 Vhash_table_test_eql |
|
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|
2451 = define_hash_table_test (Qeql, lisp_object_eql_equal, |
|
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|
2452 lisp_object_eql_hash, Qeql, Qeql_hash); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2453 (void) define_hash_table_test (Qequal, lisp_object_equal_equal, |
|
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Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2454 lisp_object_equal_hash, Qequal, Qequal_hash); |
|
71ee43b8a74d
Add #'equalp as a hash test by default; add #'define-hash-table-test, GNU API
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|
2455 (void) define_hash_table_test (Qequalp, lisp_object_equalp_equal, |
|
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|
2456 lisp_object_equalp_hash, Qequalp, Qequalp_hash); |
| 428 | 2457 } |