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829 lines
19 KiB
D
829 lines
19 KiB
D
//_ aaA.d
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/**
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* Part of the D programming language runtime library.
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* Implementation of associative arrays.
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*/
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/*
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* Copyright (C) 2000-2008 by Digital Mars, www.digitalmars.com
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* Written by Walter Bright
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* o The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* o Altered source versions must be plainly marked as such, and must not
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* be misrepresented as being the original software.
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* o This notice may not be removed or altered from any source
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* distribution.
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*/
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/*
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* Modified by Sean Kelly <sean@f4.ca> for use with Tango.
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* Modified by Tomas Lindquist Olsen <tomas@famolsen.dk> for use with LDC.
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*/
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private
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{
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import tango.stdc.stdarg;
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import tango.stdc.string;
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enum BlkAttr : uint
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{
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FINALIZE = 0b0000_0001,
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NO_SCAN = 0b0000_0010,
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NO_MOVE = 0b0000_0100,
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ALL_BITS = 0b1111_1111
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}
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extern (C) void* gc_malloc( size_t sz, uint ba = 0 );
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extern (C) void* gc_calloc( size_t sz, uint ba = 0 );
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extern (C) void gc_free( void* p );
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}
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// Auto-rehash and pre-allocate - Dave Fladebo
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static size_t[] prime_list = [
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97UL, 389UL,
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1_543UL, 6_151UL,
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24_593UL, 98_317UL,
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393_241UL, 1_572_869UL,
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6_291_469UL, 25_165_843UL,
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100_663_319UL, 402_653_189UL,
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1_610_612_741UL, 4_294_967_291UL,
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// 8_589_934_513UL, 17_179_869_143UL
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];
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struct aaA
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{
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aaA *left;
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aaA *right;
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hash_t hash;
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/* key */
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/* value */
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}
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struct BB
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{
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aaA*[] b;
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size_t nodes; // total number of aaA nodes
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TypeInfo keyti; // TODO: replace this with TypeInfo_AssociativeArray when available in _aaGet()
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}
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/* This is the type actually seen by the programmer, although
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* it is completely opaque.
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*/
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// LDC doesn't pass structs in registers so no need to wrap it ...
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alias BB* AA;
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/**********************************
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* Align to next pointer boundary, so that
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* GC won't be faced with misaligned pointers
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* in value.
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*/
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size_t aligntsize(size_t tsize)
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{
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return (tsize + size_t.sizeof - 1) & ~(size_t.sizeof - 1);
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}
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extern (C):
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/*************************************************
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* Invariant for aa.
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*/
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/+
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void _aaInvAh(aaA*[] aa)
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{
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for (size_t i = 0; i < aa.length; i++)
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{
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if (aa[i])
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_aaInvAh_x(aa[i]);
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}
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}
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private int _aaCmpAh_x(aaA *e1, aaA *e2)
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{ int c;
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c = e1.hash - e2.hash;
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if (c == 0)
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{
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c = e1.key.length - e2.key.length;
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if (c == 0)
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c = memcmp((char *)e1.key, (char *)e2.key, e1.key.length);
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}
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return c;
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}
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private void _aaInvAh_x(aaA *e)
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{
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hash_t key_hash;
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aaA *e1;
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aaA *e2;
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key_hash = getHash(e.key);
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assert(key_hash == e.hash);
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while (1)
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{ int c;
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e1 = e.left;
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if (e1)
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{
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_aaInvAh_x(e1); // ordinary recursion
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do
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{
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c = _aaCmpAh_x(e1, e);
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assert(c < 0);
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e1 = e1.right;
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} while (e1 != null);
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}
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e2 = e.right;
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if (e2)
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{
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do
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{
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c = _aaCmpAh_x(e, e2);
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assert(c < 0);
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e2 = e2.left;
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} while (e2 != null);
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e = e.right; // tail recursion
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}
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else
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break;
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}
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}
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+/
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/****************************************************
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* Determine number of entries in associative array.
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*/
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size_t _aaLen(AA aa)
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in
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{
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//printf("_aaLen()+\n");
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//_aaInv(aa);
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}
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out (result)
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{
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size_t len = 0;
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void _aaLen_x(aaA* ex)
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{
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auto e = ex;
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len++;
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while (1)
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{
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if (e.right)
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_aaLen_x(e.right);
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e = e.left;
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if (!e)
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break;
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len++;
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}
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}
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if (aa)
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{
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foreach (e; aa.b)
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{
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if (e)
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_aaLen_x(e);
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}
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}
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assert(len == result);
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//printf("_aaLen()-\n");
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}
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body
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{
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return aa ? aa.nodes : 0;
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}
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/*************************************************
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* Get pointer to value in associative array indexed by key.
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* Add entry for key if it is not already there.
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*/
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void* _aaGet(AA* aa_arg, TypeInfo keyti, size_t valuesize, void* pkey)
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in
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{
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assert(aa_arg);
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}
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out (result)
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{
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assert(result);
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assert(*aa_arg);
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assert((*aa_arg).b.length);
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//assert(_aaInAh(*aa, key));
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}
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body
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{
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//auto pkey = cast(void *)(&valuesize + 1);
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size_t i;
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aaA *e;
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auto keysize = aligntsize(keyti.tsize());
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if (!*aa_arg)
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*aa_arg = new BB();
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auto aa = *aa_arg;
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aa.keyti = keyti;
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if (!aa.b.length)
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{
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alias aaA *pa;
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auto len = prime_list[0];
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aa.b = new pa[len];
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}
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auto key_hash = keyti.getHash(pkey);
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//printf("hash = %d\n", key_hash);
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i = key_hash % aa.b.length;
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auto pe = &aa.b[i];
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while ((e = *pe) !is null)
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{
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if (key_hash == e.hash)
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{
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auto c = keyti.compare(pkey, e + 1);
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if (c == 0)
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goto Lret;
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pe = (c < 0) ? &e.left : &e.right;
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}
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else
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pe = (key_hash < e.hash) ? &e.left : &e.right;
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}
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// Not found, create new elem
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//printf("create new one\n");
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size_t size = aaA.sizeof + keysize + valuesize;
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e = cast(aaA *) gc_calloc(size);
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memcpy(e + 1, pkey, keysize);
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e.hash = key_hash;
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*pe = e;
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auto nodes = ++aa.nodes;
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//printf("length = %d, nodes = %d\n", (*aa).length, nodes);
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if (nodes > aa.b.length * 4)
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{
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_aaRehash(aa_arg,keyti);
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}
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Lret:
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return cast(void *)(e + 1) + keysize;
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}
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/*************************************************
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* Get pointer to value in associative array indexed by key.
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* Returns null if it is not already there.
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*/
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void* _aaGetRvalue(AA aa, TypeInfo keyti, size_t valuesize, void *pkey)
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{
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//printf("_aaGetRvalue(valuesize = %u)\n", valuesize);
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if (!aa)
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return null;
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//auto pkey = cast(void *)(&valuesize + 1);
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auto keysize = aligntsize(keyti.tsize());
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auto len = aa.b.length;
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if (len)
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{
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auto key_hash = keyti.getHash(pkey);
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//printf("hash = %d\n", key_hash);
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size_t i = key_hash % len;
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auto e = aa.b[i];
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while (e !is null)
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{
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if (key_hash == e.hash)
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{
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auto c = keyti.compare(pkey, e + 1);
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if (c == 0)
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return cast(void *)(e + 1) + keysize;
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e = (c < 0) ? e.left : e.right;
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}
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else
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e = (key_hash < e.hash) ? e.left : e.right;
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}
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}
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return null; // not found, caller will throw exception
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}
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/*************************************************
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* Determine if key is in aa.
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* Returns:
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* null not in aa
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* !=null in aa, return pointer to value
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*/
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void* _aaIn(AA aa, TypeInfo keyti, void *pkey)
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in
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{
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}
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out (result)
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{
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//assert(result == 0 || result == 1);
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}
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body
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{
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if (aa)
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{
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//auto pkey = cast(void *)(&keyti + 1);
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//printf("_aaIn(), .length = %d, .ptr = %x\n", aa.length, cast(uint)aa.ptr);
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auto len = aa.b.length;
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if (len)
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{
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auto key_hash = keyti.getHash(pkey);
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//printf("hash = %d\n", key_hash);
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size_t i = key_hash % len;
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auto e = aa.b[i];
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while (e !is null)
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{
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if (key_hash == e.hash)
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{
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auto c = keyti.compare(pkey, e + 1);
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if (c == 0)
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return cast(void *)(e + 1) + aligntsize(keyti.tsize());
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e = (c < 0) ? e.left : e.right;
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}
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else
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e = (key_hash < e.hash) ? e.left : e.right;
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}
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}
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}
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// Not found
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return null;
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}
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/*************************************************
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* Delete key entry in aa[].
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* If key is not in aa[], do nothing.
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*/
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void _aaDel(AA aa, TypeInfo keyti, void *pkey)
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{
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//auto pkey = cast(void *)(&keyti + 1);
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aaA *e;
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if (aa && aa.b.length)
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{
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auto key_hash = keyti.getHash(pkey);
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//printf("hash = %d\n", key_hash);
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size_t i = key_hash % aa.b.length;
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auto pe = &aa.b[i];
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while ((e = *pe) !is null) // null means not found
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{
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if (key_hash == e.hash)
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{
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auto c = keyti.compare(pkey, e + 1);
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if (c == 0)
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{
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if (!e.left && !e.right)
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{
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*pe = null;
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}
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else if (e.left && !e.right)
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{
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*pe = e.left;
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e.left = null;
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}
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else if (!e.left && e.right)
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{
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*pe = e.right;
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e.right = null;
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}
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else
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{
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*pe = e.left;
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e.left = null;
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do
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pe = &(*pe).right;
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while (*pe);
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*pe = e.right;
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e.right = null;
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}
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aa.nodes--;
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gc_free(e);
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break;
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}
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pe = (c < 0) ? &e.left : &e.right;
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}
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else
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pe = (key_hash < e.hash) ? &e.left : &e.right;
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}
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}
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}
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/********************************************
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* Produce array of values from aa.
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* The actual type is painted on the return value by the frontend
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* This means the returned length should be the number of elements
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*/
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void[] _aaValues(AA aa, size_t keysize, size_t valuesize)
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in
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{
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assert(keysize == aligntsize(keysize));
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}
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body
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{
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size_t resi;
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void[] a;
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void _aaValues_x(aaA* e)
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{
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do
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{
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memcpy(a.ptr + resi * valuesize,
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cast(byte*)e + aaA.sizeof + keysize,
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valuesize);
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resi++;
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if (e.left)
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{ if (!e.right)
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{ e = e.left;
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continue;
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}
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_aaValues_x(e.left);
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}
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e = e.right;
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} while (e !is null);
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}
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if (aa)
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{
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auto len = _aaLen(aa);
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auto ptr = cast(byte*) gc_malloc(len * valuesize,
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valuesize < (void*).sizeof ? BlkAttr.NO_SCAN : 0);
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a = ptr[0 .. len];
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resi = 0;
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foreach (e; aa.b)
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{
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if (e)
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_aaValues_x(e);
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}
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assert(resi == a.length);
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}
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return a;
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}
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/********************************************
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* Rehash an array.
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*/
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void* _aaRehash(AA* paa, TypeInfo keyti)
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in
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{
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//_aaInvAh(paa);
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}
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out (result)
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{
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//_aaInvAh(result);
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}
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body
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{
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BB newb;
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void _aaRehash_x(aaA* olde)
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{
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while (1)
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{
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auto left = olde.left;
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auto right = olde.right;
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olde.left = null;
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olde.right = null;
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aaA *e;
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//printf("rehash %p\n", olde);
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auto key_hash = olde.hash;
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size_t i = key_hash % newb.b.length;
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auto pe = &newb.b[i];
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while ((e = *pe) !is null)
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{
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//printf("\te = %p, e.left = %p, e.right = %p\n", e, e.left, e.right);
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assert(e.left != e);
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assert(e.right != e);
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if (key_hash == e.hash)
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{
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auto c = keyti.compare(olde + 1, e + 1);
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assert(c != 0);
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pe = (c < 0) ? &e.left : &e.right;
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}
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else
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pe = (key_hash < e.hash) ? &e.left : &e.right;
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}
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*pe = olde;
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if (right)
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{
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if (!left)
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{ olde = right;
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continue;
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}
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_aaRehash_x(right);
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}
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if (!left)
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break;
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olde = left;
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}
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}
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//printf("Rehash\n");
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if (*paa)
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{
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auto aa = *paa;
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auto len = _aaLen(aa);
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if (len)
|
|
{ size_t i;
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|
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for (i = 0; i < prime_list.length - 1; i++)
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{
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if (len <= prime_list[i])
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break;
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}
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len = prime_list[i];
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newb.b = new aaA*[len];
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newb.keyti = keyti;
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foreach (e; aa.b)
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{
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if (e)
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_aaRehash_x(e);
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}
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newb.nodes = (*aa).nodes;
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}
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**paa = newb;
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}
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return *paa;
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}
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|
|
|
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/********************************************
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|
* Produce array of N byte keys from aa.
|
|
* The actual type is painted on the return value by the frontend
|
|
* This means the returned length should be the number of elements
|
|
*/
|
|
|
|
void[] _aaKeys(AA aa, size_t keysize)
|
|
{
|
|
byte[] res;
|
|
size_t resi;
|
|
|
|
void _aaKeys_x(aaA* e)
|
|
{
|
|
do
|
|
{
|
|
memcpy(&res[resi * keysize], cast(byte*)(e + 1), keysize);
|
|
resi++;
|
|
if (e.left)
|
|
{ if (!e.right)
|
|
{ e = e.left;
|
|
continue;
|
|
}
|
|
_aaKeys_x(e.left);
|
|
}
|
|
e = e.right;
|
|
} while (e !is null);
|
|
}
|
|
|
|
auto len = _aaLen(aa);
|
|
if (!len)
|
|
return null;
|
|
res = (cast(byte*) gc_malloc(len * keysize,
|
|
!(aa.keyti.flags() & 1) ? BlkAttr.NO_SCAN : 0)) [0 .. len * keysize];
|
|
resi = 0;
|
|
foreach (e; aa.b)
|
|
{
|
|
if (e)
|
|
_aaKeys_x(e);
|
|
}
|
|
assert(resi == len);
|
|
|
|
return res.ptr[0 .. len];
|
|
}
|
|
|
|
|
|
/**********************************************
|
|
* 'apply' for associative arrays - to support foreach
|
|
*/
|
|
|
|
// dg is D, but _aaApply() is C
|
|
extern (D) typedef int delegate(void *) dg_t;
|
|
|
|
int _aaApply(AA aa, size_t keysize, dg_t dg)
|
|
in
|
|
{
|
|
assert(aligntsize(keysize) == keysize);
|
|
}
|
|
body
|
|
{ int result;
|
|
|
|
//printf("_aaApply(aa = x%llx, keysize = %d, dg = x%llx)\n", aa, keysize, dg);
|
|
|
|
int treewalker(aaA* e)
|
|
{ int result;
|
|
|
|
do
|
|
{
|
|
//printf("treewalker(e = %p, dg = x%llx)\n", e, dg);
|
|
result = dg(cast(void *)(e + 1) + keysize);
|
|
if (result)
|
|
break;
|
|
if (e.right)
|
|
{ if (!e.left)
|
|
{
|
|
e = e.right;
|
|
continue;
|
|
}
|
|
result = treewalker(e.right);
|
|
if (result)
|
|
break;
|
|
}
|
|
e = e.left;
|
|
} while (e);
|
|
|
|
return result;
|
|
}
|
|
|
|
if (aa)
|
|
{
|
|
foreach (e; aa.b)
|
|
{
|
|
if (e)
|
|
{
|
|
result = treewalker(e);
|
|
if (result)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
// dg is D, but _aaApply2() is C
|
|
extern (D) typedef int delegate(void *, void *) dg2_t;
|
|
|
|
int _aaApply2(AA aa, size_t keysize, dg2_t dg)
|
|
in
|
|
{
|
|
assert(aligntsize(keysize) == keysize);
|
|
}
|
|
body
|
|
{ int result;
|
|
|
|
//printf("_aaApply(aa = x%llx, keysize = %d, dg = x%llx)\n", aa, keysize, dg);
|
|
|
|
int treewalker(aaA* e)
|
|
{ int result;
|
|
|
|
do
|
|
{
|
|
//printf("treewalker(e = %p, dg = x%llx)\n", e, dg);
|
|
result = dg(cast(void *)(e + 1), cast(void *)(e + 1) + keysize);
|
|
if (result)
|
|
break;
|
|
if (e.right)
|
|
{ if (!e.left)
|
|
{
|
|
e = e.right;
|
|
continue;
|
|
}
|
|
result = treewalker(e.right);
|
|
if (result)
|
|
break;
|
|
}
|
|
e = e.left;
|
|
} while (e);
|
|
|
|
return result;
|
|
}
|
|
|
|
if (aa)
|
|
{
|
|
foreach (e; aa.b)
|
|
{
|
|
if (e)
|
|
{
|
|
result = treewalker(e);
|
|
if (result)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
/***********************************
|
|
* Construct an associative array of type ti from
|
|
* length pairs of key/value pairs.
|
|
*/
|
|
|
|
/+
|
|
|
|
extern (C)
|
|
BB* _d_assocarrayliteralT(TypeInfo_AssociativeArray ti, size_t length, ...)
|
|
{
|
|
auto valuesize = ti.next.tsize(); // value size
|
|
auto keyti = ti.key;
|
|
auto keysize = keyti.tsize(); // key size
|
|
BB* result;
|
|
|
|
//printf("_d_assocarrayliteralT(keysize = %d, valuesize = %d, length = %d)\n", keysize, valuesize, length);
|
|
//printf("tivalue = %.*s\n", ti.next.classinfo.name);
|
|
if (length == 0 || valuesize == 0 || keysize == 0)
|
|
{
|
|
;
|
|
}
|
|
else
|
|
{
|
|
va_list q;
|
|
va_start!(size_t)(q, length);
|
|
|
|
result = new BB();
|
|
size_t i;
|
|
|
|
for (i = 0; i < prime_list.length - 1; i++)
|
|
{
|
|
if (length <= prime_list[i])
|
|
break;
|
|
}
|
|
auto len = prime_list[i];
|
|
result.b = new aaA*[len];
|
|
|
|
size_t keystacksize = (keysize + int.sizeof - 1) & ~(int.sizeof - 1);
|
|
size_t valuestacksize = (valuesize + int.sizeof - 1) & ~(int.sizeof - 1);
|
|
|
|
size_t keytsize = aligntsize(keysize);
|
|
|
|
for (size_t j = 0; j < length; j++)
|
|
{ void* pkey = q;
|
|
q += keystacksize;
|
|
void* pvalue = q;
|
|
q += valuestacksize;
|
|
aaA* e;
|
|
|
|
auto key_hash = keyti.getHash(pkey);
|
|
//printf("hash = %d\n", key_hash);
|
|
i = key_hash % len;
|
|
auto pe = &result.b[i];
|
|
while (1)
|
|
{
|
|
e = *pe;
|
|
if (!e)
|
|
{
|
|
// Not found, create new elem
|
|
//printf("create new one\n");
|
|
e = cast(aaA *) cast(void*) new void[aaA.sizeof + keytsize + valuesize];
|
|
memcpy(e + 1, pkey, keysize);
|
|
e.hash = key_hash;
|
|
*pe = e;
|
|
result.nodes++;
|
|
break;
|
|
}
|
|
if (key_hash == e.hash)
|
|
{
|
|
auto c = keyti.compare(pkey, e + 1);
|
|
if (c == 0)
|
|
break;
|
|
pe = (c < 0) ? &e.left : &e.right;
|
|
}
|
|
else
|
|
pe = (key_hash < e.hash) ? &e.left : &e.right;
|
|
}
|
|
memcpy(cast(void *)(e + 1) + keytsize, pvalue, valuesize);
|
|
}
|
|
|
|
va_end(q);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
+/
|