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- /*
- 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):
-
- Alternatively, the contents of this file may be used under the terms
- of the GNU General Public License (the "GPL"), in which case the
- provisions of the GPL are applicable instead of those above. If you
- wish to allow use of your version of this file only under the terms of
- the GPL and not to allow others to use your version of this file under
- the MPL, indicate your decision by deleting the provisions above and
- replace them with the notice and other provisions required by the
- GPL. If you do not delete the provisions above, a recipient may use
- your version of this file under either the MPL or the GPL.
- */
-
- #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];
- }
- 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)
- free(p);
- }
- 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;
- }
-
-