file(s) added by xpdf 1.01.

[swftools.git] / pdf2swf / xpdf / GHash.cc

diff --git a/pdf2swf/xpdf/GHash.cc b/pdf2swf/xpdf/GHash.cc
new file mode 100644 (file)
index 0000000..dc09f71
--- /dev/null
+++ b/pdf2swf/xpdf/GHash.cc
@@ -0,0 +1,240 @@
+//========================================================================
+//
+// GHash.cc
+//
+// Copyright 2001-2002 Glyph & Cog, LLC
+//
+//========================================================================
+
+#ifdef __GNUC__
+#pragma implementation
+#endif
+
+#include <aconf.h>
+#include "gmem.h"
+#include "GString.h"
+#include "GHash.h"
+
+//------------------------------------------------------------------------
+
+struct GHashBucket {
+  GString *key;
+  void *val;
+  GHashBucket *next;
+};
+
+struct GHashIter {
+  int h;
+  GHashBucket *p;
+};
+
+//------------------------------------------------------------------------
+
+GHash::GHash(GBool deleteKeysA) {
+  int h;
+
+  deleteKeys = deleteKeysA;
+  size = 7;
+  tab = (GHashBucket **)gmalloc(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 **oldTab;
+  GHashBucket *p;
+  int oldSize, i, h;
+
+  // expand the table if necessary
+  if (len >= size) {
+    oldSize = size;
+    oldTab = tab;
+    size = 2*size + 1;
+    tab = (GHashBucket **)gmalloc(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);
+  }
+
+  // add the new symbol
+  p = new GHashBucket;
+  p->key = key;
+  p->val = val;
+  h = hash(key);
+  p->next = tab[h];
+  tab[h] = p;
+  ++len;
+}
+
+void *GHash::lookup(GString *key) {
+  GHashBucket *p;
+  int h;
+
+  if (!(p = find(key, &h))) {
+    return NULL;
+  }
+  return p->val;
+}
+
+void *GHash::lookup(char *key) {
+  GHashBucket *p;
+  int h;
+
+  if (!(p = find(key, &h))) {
+    return NULL;
+  }
+  return p->val;
+}
+
+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;
+  delete p;
+  --len;
+  return val;
+}
+
+void *GHash::remove(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;
+  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;
+  return gTrue;
+}
+
+void GHash::killIter(GHashIter **iter) {
+  delete *iter;
+  *iter = NULL;
+}
+
+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(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) {
+  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(char *key) {
+  char *p;
+  unsigned int h;
+
+  h = 0;
+  for (p = key; *p; ++p) {
+    h = 17 * h + (int)(*p & 0xff);
+  }
+  return (int)(h % size);
+}