Missing files from last commit

src/str.c

+/*
+ * String management for the Gnumeric Spreadsheet
+ *
+ * (C) 1998 the Free Software Foundation
+ *
+ * Author:
+ *   Miguel de Icaza (miguel@kernel.org)
+ *
+ */
+#include <config.h>
+#include <glib.h>
+#include <string.h>
+#include "str.h"
+
+static GHashTable *string_hash_table;
+
+String *
+string_lookup (char *s)
+{
+	String *string;
+
+	g_return_val_if_fail (s != NULL, NULL);
+	string = (String *) g_hash_table_lookup (string_hash_table, s);
+	return string;
+}
+
+String *
+string_get (char *s)
+{
+	String *string;
+
+	string = string_lookup (s);
+	if (string){
+		string_ref (string);
+		return string;
+	}
+
+	/* If non-existant, create */
+	string = g_new (String, 1);
+	string->ref_count = 1;
+	string->str = g_strdup (s);
+
+	g_hash_table_insert (string_hash_table, string->str, string);
+
+	return string;
+}
+
+void
+string_ref (String *string)
+{
+	g_return_if_fail (string != NULL);
+
+	string->ref_count++;
+}
+
+void
+string_unref (String *string)
+{
+	g_return_if_fail (string != NULL);
+	g_return_if_fail (string->ref_count > 0);
+	
+	if (--(string->ref_count) == 0){
+		g_free (string->str);
+		g_free (string);
+	}
+}
+
+/*
+ * Decrements the reference count on *string, and if
+ * it reaches zero, it also clears the value pointed
+ * by string_ptr
+ */
+void
+string_unref_ptr (String **string_ptr)
+{
+	g_return_if_fail (string_ptr != NULL);
+	g_return_if_fail (*string_ptr != NULL);
+	g_return_if_fail ((*string_ptr)->ref_count > 0);
+	
+	if (--((*string_ptr)->ref_count) == 0){
+		g_free ((*string_ptr)->str);
+		g_free (*string_ptr);
+		*string_ptr = NULL;
+	}
+}
+
+void
+string_init (void)
+{
+	string_hash_table = g_hash_table_new (g_str_hash, g_str_equal);
+}
+

src/str.h

+#ifndef STRING_H
+#define STRING_H
+
+typedef struct {
+	int        ref_count;
+	char       *str;
+} String;
+
+void    string_init           (void);
+
+String *string_lookup         (char *s);
+String *string_get            (char *s);
+void    string_ref            (String *);
+void    string_unref          (String *);
+void    string_unref_ptr      (String **);
+
+#endif