/src/xpdf-4.06/goo/GHash.cc

Source
//========================================================================
//
// GHash.cc
//
// Copyright 2001-2003 Glyph & Cog, LLC
//
//========================================================================

#include <aconf.h>

#include "gmem.h"
#include "gmempp.h"
#include "GString.h"
#include "GHash.h"

//------------------------------------------------------------------------

struct GHashBucket {
  GString *key;
  union {
    void *p;
    int i;
  } val;
  GHashBucket *next;
};

struct GHashIter {
  int h;
  GHashBucket *p;
};

//------------------------------------------------------------------------

GHash::GHash(GBool deleteKeysA) {
  int h;

  deleteKeys = deleteKeysA;
  size = 7;
  tab = (GHashBucket **)gmallocn(size, sizeof(GHashBucket *));
  for (h = 0; h < size; ++h) {
    tab[h] = NULL;
  }
  len = 0;
}

GHash::~GHash() {
  GHashBucket *p;
  int h;

  for (h = 0; h < size; ++h) {
    while (tab[h]) {
      p = tab[h];
      tab[h] = p->next;
      if (deleteKeys) {
  delete p->key;
      }
      delete p;
    }
  }
  gfree(tab);
}

void GHash::add(GString *key, void *val) {
  GHashBucket *p;
  int h;

  // expand the table if necessary
  if (len >= size) {
    expand();
  }

  // add the new symbol
  p = new GHashBucket;
  p->key = key;
  p->val.p = val;
  h = hash(key);
  p->next = tab[h];
  tab[h] = p;
  ++len;
}

void GHash::add(GString *key, int val) {
  GHashBucket *p;
  int h;

  // expand the table if necessary
  if (len >= size) {
    expand();
  }

  // add the new symbol
  p = new GHashBucket;
  p->key = key;
  p->val.i = val;
  h = hash(key);
  p->next = tab[h];
  tab[h] = p;
  ++len;
}

void GHash::replace(GString *key, void *val) {
  GHashBucket *p;
  int h;

  if ((p = find(key, &h))) {
    p->val.p = val;
    if (deleteKeys) {
      delete key;
    }
  } else {
    add(key, val);
  }
}

void GHash::replace(GString *key, int val) {
  GHashBucket *p;
  int h;

  if ((p = find(key, &h))) {
    p->val.i = val;
    if (deleteKeys) {
      delete key;
    }
  } else {
    add(key, val);
  }
}

void *GHash::lookup(GString *key) {
  GHashBucket *p;
  int h;

  if (!(p = find(key, &h))) {
    return NULL;
  }
  return p->val.p;
}

int GHash::lookupInt(GString *key) {
  GHashBucket *p;
  int h;

  if (!(p = find(key, &h))) {
    return 0;
  }
  return p->val.i;
}

void *GHash::lookup(const char *key) {
  GHashBucket *p;
  int h;

  if (!(p = find(key, &h))) {
    return NULL;
  }
  return p->val.p;
}

int GHash::lookupInt(const char *key) {
  GHashBucket *p;
  int h;

  if (!(p = find(key, &h))) {
    return 0;
  }
  return p->val.i;
}

void *GHash::remove(GString *key) {
  GHashBucket *p;
  GHashBucket **q;
  void *val;
  int h;

  if (!(p = find(key, &h))) {
    return NULL;
  }
  q = &tab[h];
  while (*q != p) {
    q = &((*q)->next);
  }
  *q = p->next;
  if (deleteKeys) {
    delete p->key;
  }
  val = p->val.p;
  delete p;
  --len;
  return val;
}

int GHash::removeInt(GString *key) {
  GHashBucket *p;
  GHashBucket **q;
  int val;
  int h;

  if (!(p = find(key, &h))) {
    return 0;
  }
  q = &tab[h];
  while (*q != p) {
    q = &((*q)->next);
  }
  *q = p->next;
  if (deleteKeys) {
    delete p->key;
  }
  val = p->val.i;
  delete p;
  --len;
  return val;
}

void *GHash::remove(const char *key) {
  GHashBucket *p;
  GHashBucket **q;
  void *val;
  int h;

  if (!(p = find(key, &h))) {
    return NULL;
  }
  q = &tab[h];
  while (*q != p) {
    q = &((*q)->next);
  }
  *q = p->next;
  if (deleteKeys) {
    delete p->key;
  }
  val = p->val.p;
  delete p;
  --len;
  return val;
}

int GHash::removeInt(const char *key) {
  GHashBucket *p;
  GHashBucket **q;
  int val;
  int h;

  if (!(p = find(key, &h))) {
    return 0;
  }
  q = &tab[h];
  while (*q != p) {
    q = &((*q)->next);
  }
  *q = p->next;
  if (deleteKeys) {
    delete p->key;
  }
  val = p->val.i;
  delete p;
  --len;
  return val;
}

void GHash::startIter(GHashIter **iter) {
  *iter = new GHashIter;
  (*iter)->h = -1;
  (*iter)->p = NULL;
}

GBool GHash::getNext(GHashIter **iter, GString **key, void **val) {
  if (!*iter) {
    return gFalse;
  }
  if ((*iter)->p) {
    (*iter)->p = (*iter)->p->next;
  }
  while (!(*iter)->p) {
    if (++(*iter)->h == size) {
      delete *iter;
      *iter = NULL;
      return gFalse;
    }
    (*iter)->p = tab[(*iter)->h];
  }
  *key = (*iter)->p->key;
  *val = (*iter)->p->val.p;
  return gTrue;
}

GBool GHash::getNext(GHashIter **iter, GString **key, int *val) {
  if (!*iter) {
    return gFalse;
  }
  if ((*iter)->p) {
    (*iter)->p = (*iter)->p->next;
  }
  while (!(*iter)->p) {
    if (++(*iter)->h == size) {
      delete *iter;
      *iter = NULL;
      return gFalse;
    }
    (*iter)->p = tab[(*iter)->h];
  }
  *key = (*iter)->p->key;
  *val = (*iter)->p->val.i;
  return gTrue;
}

void GHash::killIter(GHashIter **iter) {
  delete *iter;
  *iter = NULL;
}

void GHash::expand() {
  GHashBucket **oldTab;
  GHashBucket *p;
  int oldSize, h, i;

  oldSize = size;
  oldTab = tab;
  size = 2*size + 1;
  tab = (GHashBucket **)gmallocn(size, sizeof(GHashBucket *));
  for (h = 0; h < size; ++h) {
    tab[h] = NULL;
  }
  for (i = 0; i < oldSize; ++i) {
    while (oldTab[i]) {
      p = oldTab[i];
      oldTab[i] = oldTab[i]->next;
      h = hash(p->key);
      p->next = tab[h];
      tab[h] = p;
    }
  }
  gfree(oldTab);
}

GHashBucket *GHash::find(GString *key, int *h) {
  GHashBucket *p;

  *h = hash(key);
  for (p = tab[*h]; p; p = p->next) {
    if (!p->key->cmp(key)) {
      return p;
    }
  }
  return NULL;
}

GHashBucket *GHash::find(const char *key, int *h) {
  GHashBucket *p;

  *h = hash(key);
  for (p = tab[*h]; p; p = p->next) {
    if (!p->key->cmp(key)) {
      return p;
    }
  }
  return NULL;
}

int GHash::hash(GString *key) {
  const char *p;
  unsigned int h;
  int i;

  h = 0;
  for (p = key->getCString(), i = 0; i < key->getLength(); ++p, ++i) {
    h = 17 * h + (int)(*p & 0xff);
  }
  return (int)(h % size);
}

int GHash::hash(const char *key) {
  const char *p;
  unsigned int h;

  h = 0;
  for (p = key; *p; ++p) {
    h = 17 * h + (int)(*p & 0xff);
  }
  return (int)(h % size);
}

Coverage Report

Created: 2026-08-31 06:45

Line	Count	Source
1		//========================================================================
2		//
3		// GHash.cc
4		//
5		// Copyright 2001-2003 Glyph & Cog, LLC
6		//
7		//========================================================================
8
9		#include <aconf.h>
10
11		#include "gmem.h"
12		#include "gmempp.h"
13		#include "GString.h"
14		#include "GHash.h"
15
16		//------------------------------------------------------------------------
17
18		struct GHashBucket {
19		GString *key;
20		union {
21		void *p;
22		int i;
23		} val;
24		GHashBucket *next;
25		};
26
27		struct GHashIter {
28		int h;
29		GHashBucket *p;
30		};
31
32		//------------------------------------------------------------------------
33
34	485k	GHash::GHash(GBool deleteKeysA) {
35	485k	int h;
36
37	485k	deleteKeys = deleteKeysA;
38	485k	size = 7;
39	485k	tab = (GHashBucket *)gmallocn(size, sizeof(GHashBucket ));
40	3.88M	for (h = 0; h < size; ++h) {
41	3.39M	tab[h] = NULL;
42	3.39M	}
43	485k	len = 0;
44	485k	}
45
46	485k	GHash::~GHash() {
47	485k	GHashBucket *p;
48	485k	int h;
49
50	4.27M	for (h = 0; h < size; ++h) {
51	4.37M	while (tab[h]) {
52	584k	p = tab[h];
53	584k	tab[h] = p->next;
54	584k	if (deleteKeys) {
55	424k	delete p->key;
56	424k	}
57	584k	delete p;
58	584k	}
59	3.79M	}
60	485k	gfree(tab);
61	485k	}
62
63	352k	void GHash::add(GString key, void val) {
64	352k	GHashBucket *p;
65	352k	int h;
66
67		// expand the table if necessary
68	352k	if (len >= size) {
69	3.81k	expand();
70	3.81k	}
71
72		// add the new symbol
73	352k	p = new GHashBucket;
74	352k	p->key = key;
75	352k	p->val.p = val;
76	352k	h = hash(key);
77	352k	p->next = tab[h];
78	352k	tab[h] = p;
79	352k	++len;
80	352k	}
81
82	456k	void GHash::add(GString *key, int val) {
83	456k	GHashBucket *p;
84	456k	int h;
85
86		// expand the table if necessary
87	456k	if (len >= size) {
88	7.89k	expand();
89	7.89k	}
90
91		// add the new symbol
92	456k	p = new GHashBucket;
93	456k	p->key = key;
94	456k	p->val.i = val;
95	456k	h = hash(key);
96	456k	p->next = tab[h];
97	456k	tab[h] = p;
98	456k	++len;
99	456k	}
100
101	0	void GHash::replace(GString key, void val) {
102	0	GHashBucket *p;
103	0	int h;
104
105	0	if ((p = find(key, &h))) {
106	0	p->val.p = val;
107	0	if (deleteKeys) {
108	0	delete key;
109	0	}
110	0	} else {
111	0	add(key, val);
112	0	}
113	0	}
114
115	15.1k	void GHash::replace(GString *key, int val) {
116	15.1k	GHashBucket *p;
117	15.1k	int h;
118
119	15.1k	if ((p = find(key, &h))) {
120	8.02k	p->val.i = val;
121	8.02k	if (deleteKeys) {
122	0	delete key;
123	0	}
124	8.02k	} else {
125	7.08k	add(key, val);
126	7.08k	}
127	15.1k	}
128
129	280k	void GHash::lookup(GString key) {
130	280k	GHashBucket *p;
131	280k	int h;
132
133	280k	if (!(p = find(key, &h))) {
134	280k	return NULL;
135	280k	}
136	316	return p->val.p;
137	280k	}
138
139	15.3k	int GHash::lookupInt(GString *key) {
140	15.3k	GHashBucket *p;
141	15.3k	int h;
142
143	15.3k	if (!(p = find(key, &h))) {
144	7.30k	return 0;
145	7.30k	}
146	8.02k	return p->val.i;
147	15.3k	}
148
149	1.14M	void GHash::lookup(const char key) {
150	1.14M	GHashBucket *p;
151	1.14M	int h;
152
153	1.14M	if (!(p = find(key, &h))) {
154	1.03M	return NULL;
155	1.03M	}
156	113k	return p->val.p;
157	1.14M	}
158
159	871k	int GHash::lookupInt(const char *key) {
160	871k	GHashBucket *p;
161	871k	int h;
162
163	871k	if (!(p = find(key, &h))) {
164	715k	return 0;
165	715k	}
166	156k	return p->val.i;
167	871k	}
168
169	0	void GHash::remove(GString key) {
170	0	GHashBucket *p;
171	0	GHashBucket **q;
172	0	void *val;
173	0	int h;
174
175	0	if (!(p = find(key, &h))) {
176	0	return NULL;
177	0	}
178	0	q = &tab[h];
179	0	while (*q != p) {
180	0	q = &((*q)->next);
181	0	}
182	0	*q = p->next;
183	0	if (deleteKeys) {
184	0	delete p->key;
185	0	}
186	0	val = p->val.p;
187	0	delete p;
188	0	--len;
189	0	return val;
190	0	}
191
192	6.83k	int GHash::removeInt(GString *key) {
193	6.83k	GHashBucket *p;
194	6.83k	GHashBucket **q;
195	6.83k	int val;
196	6.83k	int h;
197
198	6.83k	if (!(p = find(key, &h))) {
199	424	return 0;
200	424	}
201	6.41k	q = &tab[h];
202	7.06k	while (*q != p) {
203	651	q = &((*q)->next);
204	651	}
205	6.41k	*q = p->next;
206	6.41k	if (deleteKeys) {
207	6.41k	delete p->key;
208	6.41k	}
209	6.41k	val = p->val.i;
210	6.41k	delete p;
211	6.41k	--len;
212	6.41k	return val;
213	6.83k	}
214
215	0	void GHash::remove(const char key) {
216	0	GHashBucket *p;
217	0	GHashBucket **q;
218	0	void *val;
219	0	int h;
220
221	0	if (!(p = find(key, &h))) {
222	0	return NULL;
223	0	}
224	0	q = &tab[h];
225	0	while (*q != p) {
226	0	q = &((*q)->next);
227	0	}
228	0	*q = p->next;
229	0	if (deleteKeys) {
230	0	delete p->key;
231	0	}
232	0	val = p->val.p;
233	0	delete p;
234	0	--len;
235	0	return val;
236	0	}
237
238	225k	int GHash::removeInt(const char *key) {
239	225k	GHashBucket *p;
240	225k	GHashBucket **q;
241	225k	int val;
242	225k	int h;
243
244	225k	if (!(p = find(key, &h))) {
245	8.60k	return 0;
246	8.60k	}
247	216k	q = &tab[h];
248	264k	while (*q != p) {
249	47.3k	q = &((*q)->next);
250	47.3k	}
251	216k	*q = p->next;
252	216k	if (deleteKeys) {
253	216k	delete p->key;
254	216k	}
255	216k	val = p->val.i;
256	216k	delete p;
257	216k	--len;
258	216k	return val;
259	225k	}
260
261	502k	void GHash::startIter(GHashIter **iter) {
262	502k	*iter = new GHashIter;
263	502k	(*iter)->h = -1;
264	502k	(*iter)->p = NULL;
265	502k	}
266
267	855k	GBool GHash::getNext(GHashIter iter, GString key, void **val) {
268	855k	if (!*iter) {
269	0	return gFalse;
270	0	}
271	855k	if ((*iter)->p) {
272	352k	(iter)->p = (iter)->p->next;
273	352k	}
274	4.40M	while (!(*iter)->p) {
275	4.05M	if (++(*iter)->h == size) {
276	502k	delete *iter;
277	502k	*iter = NULL;
278	502k	return gFalse;
279	502k	}
280	3.55M	(iter)->p = tab[(iter)->h];
281	3.55M	}
282	352k	key = (iter)->p->key;
283	352k	val = (iter)->p->val.p;
284	352k	return gTrue;
285	855k	}
286
287	0	GBool GHash::getNext(GHashIter iter, GString key, int *val) {
288	0	if (!*iter) {
289	0	return gFalse;
290	0	}
291	0	if ((*iter)->p) {
292	0	(iter)->p = (iter)->p->next;
293	0	}
294	0	while (!(*iter)->p) {
295	0	if (++(*iter)->h == size) {
296	0	delete *iter;
297	0	*iter = NULL;
298	0	return gFalse;
299	0	}
300	0	(iter)->p = tab[(iter)->h];
301	0	}
302	0	key = (iter)->p->key;
303	0	val = (iter)->p->val.i;
304	0	return gTrue;
305	0	}
306
307	3	void GHash::killIter(GHashIter **iter) {
308	3	delete *iter;
309	3	*iter = NULL;
310	3	}
311
312	11.7k	void GHash::expand() {
313	11.7k	GHashBucket **oldTab;
314	11.7k	GHashBucket *p;
315	11.7k	int oldSize, h, i;
316
317	11.7k	oldSize = size;
318	11.7k	oldTab = tab;
319	11.7k	size = 2*size + 1;
320	11.7k	tab = (GHashBucket *)gmallocn(size, sizeof(GHashBucket ));
321	783k	for (h = 0; h < size; ++h) {
322	771k	tab[h] = NULL;
323	771k	}
324	391k	for (i = 0; i < oldSize; ++i) {
325	760k	while (oldTab[i]) {
326	380k	p = oldTab[i];
327	380k	oldTab[i] = oldTab[i]->next;
328	380k	h = hash(p->key);
329	380k	p->next = tab[h];
330	380k	tab[h] = p;
331	380k	}
332	380k	}
333	11.7k	gfree(oldTab);
334	11.7k	}
335
336	317k	GHashBucket GHash::find(GString key, int *h) {
337	317k	GHashBucket *p;
338
339	317k	*h = hash(key);
340	323k	for (p = tab[*h]; p; p = p->next) {
341	28.7k	if (!p->key->cmp(key)) {
342	22.7k	return p;
343	22.7k	}
344	28.7k	}
345	295k	return NULL;
346	317k	}
347
348	2.24M	GHashBucket GHash::find(const char key, int *h) {
349	2.24M	GHashBucket *p;
350
351	2.24M	*h = hash(key);
352	2.50M	for (p = tab[*h]; p; p = p->next) {
353	750k	if (!p->key->cmp(key)) {
354	486k	return p;
355	486k	}
356	750k	}
357	1.75M	return NULL;
358	2.24M	}
359
360	1.50M	int GHash::hash(GString *key) {
361	1.50M	const char *p;
362	1.50M	unsigned int h;
363	1.50M	int i;
364
365	1.50M	h = 0;
366	208M	for (p = key->getCString(), i = 0; i < key->getLength(); ++p, ++i) {
367	206M	h = 17 * h + (int)(*p & 0xff);
368	206M	}
369	1.50M	return (int)(h % size);
370	1.50M	}
371
372	2.24M	int GHash::hash(const char *key) {
373	2.24M	const char *p;
374	2.24M	unsigned int h;
375
376	2.24M	h = 0;
377	24.9M	for (p = key; *p; ++p) {
378	22.7M	h = 17 * h + (int)(*p & 0xff);
379	22.7M	}
380	2.24M	return (int)(h % size);
381	2.24M	}