1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in
csompliance with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/
Software distributed under the License is distributed on an "AS IS"
basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
License for the specific language governing rights and limitations
under the License.
The Original Code is expat.
The Initial Developer of the Original Code is James Clark.
Portions created by James Clark are Copyright (C) 1998, 1999
James Clark. All Rights Reserved.
Contributor(s):
*/
#include "xmldef.h"
#ifdef XML_UNICODE_WCHAR_T
#ifndef XML_UNICODE
#define XML_UNICODE
#endif
#endif
#include "hashtable.h"
#define INIT_SIZE 64
static
int keyeq(KEY s1, KEY s2)
{
for (; *s1 == *s2; s1++, s2++)
if (*s1 == 0)
return 1;
return 0;
}
static
unsigned long hash(KEY s)
{
unsigned long h = 0;
while (*s)
h = (h << 5) + h + (unsigned char)*s++;
return h;
}
NAMED *lookup(HASH_TABLE *table, KEY name, size_t createSize)
{
size_t i;
if (table->size == 0) {
if (!createSize)
return 0;
table->v = calloc(INIT_SIZE, sizeof(NAMED *));
if (!table->v)
return 0;
table->size = INIT_SIZE;
table->usedLim = INIT_SIZE / 2;
i = hash(name) & (table->size - 1);
}
else {
unsigned long h = hash(name);
for (i = h & (table->size - 1);
table->v[i];
i == 0 ? i = table->size - 1 : --i) {
if (keyeq(name, table->v[i]->name))
return table->v[i];
}
if (!createSize)
return 0;
if (table->used == table->usedLim) {
/* check for overflow */
size_t newSize = table->size * 2;
NAMED **newV = calloc(newSize, sizeof(NAMED *));
if (!newV)
return 0;
for (i = 0; i < table->size; i++)
if (table->v[i]) {
size_t j;
for (j = hash(table->v[i]->name) & (newSize - 1);
newV[j];
j == 0 ? j = newSize - 1 : --j)
;
newV[j] = table->v[i];
}
g_free(table->v);
table->v = newV;
table->size = newSize;
table->usedLim = newSize/2;
for (i = h & (table->size - 1);
table->v[i];
i == 0 ? i = table->size - 1 : --i)
;
}
}
table->v[i] = calloc(1, createSize);
if (!table->v[i])
return 0;
table->v[i]->name = name;
(table->used)++;
return table->v[i];
}
void hashTableDestroy(HASH_TABLE *table)
{
size_t i;
for (i = 0; i < table->size; i++) {
NAMED *p = table->v[i];
if (p)
g_free(p);
}
g_free(table->v);
}
void hashTableInit(HASH_TABLE *p)
{
p->size = 0;
p->usedLim = 0;
p->used = 0;
p->v = 0;
}
void hashTableIterInit(HASH_TABLE_ITER *iter, const HASH_TABLE *table)
{
iter->p = table->v;
iter->end = iter->p + table->size;
}
NAMED *hashTableIterNext(HASH_TABLE_ITER *iter)
{
while (iter->p != iter->end) {
NAMED *tem = *(iter->p)++;
if (tem)
return tem;
}
return 0;
}
|
