1 files changed, 99 insertions, 0 deletions
diff --git a/dvi/mdvi-lib/assoc.c b/dvi/mdvi-lib/assoc.c
new file mode 100644
index 0000000..e3ba113
--- /dev/null
+++ b/dvi/mdvi-lib/assoc.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2000, Matias Atria
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "mdvi.h"
+#include "assoc.h"
+#include "hash.h"
+
+typedef struct {
+	void	*data;
+	DviFree2Func free_func;
+} DviAssoc;
+
+#define MDVI_ASSOC_SIZE	31
+
+static void assoc_free(DviHashKey key, void *ptr)
+{
+	DviAssoc *assoc = (DviAssoc *)ptr;
+
+	DEBUG((4, "Destroying association `%s'\n", (char *)key));	
+	if(assoc->free_func)
+		assoc->free_func(key, assoc->data);
+	xfree(assoc);
+}
+
+int	mdvi_assoc_put(DviContext *dvi, char *key, void *data, DviFree2Func f)
+{
+	DviAssoc *assoc;
+	int	ok;
+		
+	if(dvi->assoc.buckets == NULL) {
+		mdvi_hash_create(&dvi->assoc, MDVI_ASSOC_SIZE);
+		dvi->assoc.hash_free = assoc_free;
+	}
+	assoc = xalloc(DviAssoc);
+	assoc->data = data;
+	assoc->free_func = f;
+
+	ok = mdvi_hash_add(&dvi->assoc, MDVI_KEY(key), 
+		assoc, MDVI_HASH_UNIQUE);
+	if(ok < 0) {
+		xfree(assoc);
+		return -1;
+	}
+	return 0;
+}
+
+void	*mdvi_assoc_get(DviContext *dvi, char *key)
+{
+	DviAssoc *assoc;
+	
+	if(dvi->assoc.buckets == NULL)
+		return NULL;
+	assoc = (DviAssoc *)mdvi_hash_lookup(&dvi->assoc, MDVI_KEY(key));
+	return assoc ? assoc->data : NULL;
+}
+
+void	*mdvi_assoc_del(DviContext *dvi, char *key)
+{
+	DviAssoc *assoc;
+	void	*ptr;
+	
+	if(dvi->assoc.buckets == NULL)
+		return NULL;
+	assoc = mdvi_hash_remove(&dvi->assoc, MDVI_KEY(key));
+	if(assoc == NULL)
+		return NULL;
+	ptr = assoc->data;
+	xfree(assoc);
+	return ptr;
+}
+
+void	mdvi_assoc_free(DviContext *dvi, char *key)
+{
+	if(dvi->assoc.buckets) {
+		/* this will call `assoc_free' */
+		mdvi_hash_destroy_key(&dvi->assoc, MDVI_KEY(key));
+	}
+}
+
+void	mdvi_assoc_flush(DviContext *dvi)
+{
+	if(dvi->assoc.buckets)
+		mdvi_hash_reset(&dvi->assoc, 0);
+}