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+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpparasite.c
+ * Copyright (C) 1998 Jay Cox <jaycox@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <string.h>
+
+#include <glib-object.h>
+
+#ifdef G_OS_WIN32
+#include <process.h> /* For _getpid() */
+#endif
+
+#include "gimpbasetypes.h"
+
+#include "gimpparasite.h"
+
+
+/**
+ * SECTION: gimpparasite
+ * @title: GimpParasite
+ * @short_description: Arbitrary pieces of data which can be attached
+ * to various GIMP objects.
+ * @see_also: gimp_image_parasite_attach(),
+ * gimp_drawable_parasite_attach(), gimp_parasite_attach()
+ * and their related functions.
+ *
+ * Arbitrary pieces of data which can be attached to various GIMP objects.
+ **/
+
+
+/*
+ * GIMP_TYPE_PARASITE
+ */
+
+GType
+gimp_parasite_get_type (void)
+{
+ static GType type = 0;
+
+ if (! type)
+ type = g_boxed_type_register_static ("GimpParasite",
+ (GBoxedCopyFunc) gimp_parasite_copy,
+ (GBoxedFreeFunc) gimp_parasite_free);
+
+ return type;
+}
+
+
+/*
+ * GIMP_TYPE_PARAM_PARASITE
+ */
+
+#define GIMP_PARAM_SPEC_PARASITE(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), GIMP_TYPE_PARAM_PARASITE, GimpParamSpecParasite))
+
+typedef struct _GimpParamSpecParasite GimpParamSpecParasite;
+
+struct _GimpParamSpecParasite
+{
+ GParamSpecBoxed parent_instance;
+};
+
+static void gimp_param_parasite_class_init (GParamSpecClass *class);
+static void gimp_param_parasite_init (GParamSpec *pspec);
+static gboolean gimp_param_parasite_validate (GParamSpec *pspec,
+ GValue *value);
+static gint gimp_param_parasite_values_cmp (GParamSpec *pspec,
+ const GValue *value1,
+ const GValue *value2);
+
+GType
+gimp_param_parasite_get_type (void)
+{
+ static GType type = 0;
+
+ if (! type)
+ {
+ const GTypeInfo type_info =
+ {
+ sizeof (GParamSpecClass),
+ NULL, NULL,
+ (GClassInitFunc) gimp_param_parasite_class_init,
+ NULL, NULL,
+ sizeof (GimpParamSpecParasite),
+ 0,
+ (GInstanceInitFunc) gimp_param_parasite_init
+ };
+
+ type = g_type_register_static (G_TYPE_PARAM_BOXED,
+ "GimpParamParasite",
+ &type_info, 0);
+ }
+
+ return type;
+}
+
+static void
+gimp_param_parasite_class_init (GParamSpecClass *class)
+{
+ class->value_type = GIMP_TYPE_PARASITE;
+ class->value_validate = gimp_param_parasite_validate;
+ class->values_cmp = gimp_param_parasite_values_cmp;
+}
+
+static void
+gimp_param_parasite_init (GParamSpec *pspec)
+{
+}
+
+static gboolean
+gimp_param_parasite_validate (GParamSpec *pspec,
+ GValue *value)
+{
+ GimpParasite *parasite = value->data[0].v_pointer;
+
+ if (! parasite)
+ {
+ return TRUE;
+ }
+ else if (parasite->name == NULL ||
+ *parasite->name == '\0' ||
+ ! g_utf8_validate (parasite->name, -1, NULL) ||
+ (parasite->size == 0 && parasite->data != NULL) ||
+ (parasite->size > 0 && parasite->data == NULL))
+ {
+ g_value_set_boxed (value, NULL);
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static gint
+gimp_param_parasite_values_cmp (GParamSpec *pspec,
+ const GValue *value1,
+ const GValue *value2)
+{
+ GimpParasite *parasite1 = value1->data[0].v_pointer;
+ GimpParasite *parasite2 = value2->data[0].v_pointer;
+
+ /* try to return at least *something*, it's useless anyway... */
+
+ if (! parasite1)
+ return parasite2 != NULL ? -1 : 0;
+ else if (! parasite2)
+ return parasite1 != NULL;
+ else
+ return gimp_parasite_compare (parasite1, parasite2);
+}
+
+GParamSpec *
+gimp_param_spec_parasite (const gchar *name,
+ const gchar *nick,
+ const gchar *blurb,
+ GParamFlags flags)
+{
+ GimpParamSpecParasite *parasite_spec;
+
+ parasite_spec = g_param_spec_internal (GIMP_TYPE_PARAM_PARASITE,
+ name, nick, blurb, flags);
+
+ return G_PARAM_SPEC (parasite_spec);
+}
+
+
+#ifdef DEBUG
+static void
+gimp_parasite_print (GimpParasite *parasite)
+{
+ if (parasite == NULL)
+ {
+ g_print ("pid %d: attempt to print a null parasite\n", getpid ());
+ return;
+ }
+
+ g_print ("pid %d: parasite: %p\n", getpid (), parasite);
+
+ if (parasite->name)
+ g_print ("\tname: %s\n", parasite->name);
+ else
+ g_print ("\tname: NULL\n");
+
+ g_print ("\tflags: %d\n", parasite->flags);
+ g_print ("\tsize: %d\n", parasite->size);
+ if (parasite->size > 0)
+ g_print ("\tdata: %p\n", parasite->data);
+}
+#endif
+
+GimpParasite *
+gimp_parasite_new (const gchar *name,
+ guint32 flags,
+ guint32 size,
+ gconstpointer data)
+{
+ GimpParasite *parasite;
+
+ if (! (name && *name))
+ return NULL;
+
+ parasite = g_slice_new (GimpParasite);
+ parasite->name = g_strdup (name);
+ parasite->flags = (flags & 0xFF);
+ parasite->size = size;
+
+ if (size)
+ parasite->data = g_memdup (data, size);
+ else
+ parasite->data = NULL;
+
+ return parasite;
+}
+
+void
+gimp_parasite_free (GimpParasite *parasite)
+{
+ if (parasite == NULL)
+ return;
+
+ if (parasite->name)
+ g_free (parasite->name);
+
+ if (parasite->data)
+ g_free (parasite->data);
+
+ g_slice_free (GimpParasite, parasite);
+}
+
+gboolean
+gimp_parasite_is_type (const GimpParasite *parasite,
+ const gchar *name)
+{
+ if (!parasite || !parasite->name)
+ return FALSE;
+
+ return (strcmp (parasite->name, name) == 0);
+}
+
+GimpParasite *
+gimp_parasite_copy (const GimpParasite *parasite)
+{
+ if (parasite == NULL)
+ return NULL;
+
+ return gimp_parasite_new (parasite->name, parasite->flags,
+ parasite->size, parasite->data);
+}
+
+gboolean
+gimp_parasite_compare (const GimpParasite *a,
+ const GimpParasite *b)
+{
+ if (a && b &&
+ a->name && b->name &&
+ strcmp (a->name, b->name) == 0 &&
+ a->flags == b->flags &&
+ a->size == b->size)
+ {
+ if (a->data == NULL && b->data == NULL)
+ return TRUE;
+ else if (a->data && b->data && memcmp (a->data, b->data, a->size) == 0)
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+gulong
+gimp_parasite_flags (const GimpParasite *parasite)
+{
+ if (parasite == NULL)
+ return 0;
+
+ return parasite->flags;
+}
+
+gboolean
+gimp_parasite_is_persistent (const GimpParasite *parasite)
+{
+ if (parasite == NULL)
+ return FALSE;
+
+ return (parasite->flags & GIMP_PARASITE_PERSISTENT);
+}
+
+gboolean
+gimp_parasite_is_undoable (const GimpParasite *parasite)
+{
+ if (parasite == NULL)
+ return FALSE;
+
+ return (parasite->flags & GIMP_PARASITE_UNDOABLE);
+}
+
+gboolean
+gimp_parasite_has_flag (const GimpParasite *parasite,
+ gulong flag)
+{
+ if (parasite == NULL)
+ return FALSE;
+
+ return (parasite->flags & flag);
+}
+
+const gchar *
+gimp_parasite_name (const GimpParasite *parasite)
+{
+ if (parasite)
+ return parasite->name;
+
+ return NULL;
+}
+
+gconstpointer
+gimp_parasite_data (const GimpParasite *parasite)
+{
+ if (parasite)
+ return parasite->data;
+
+ return NULL;
+}
+
+glong
+gimp_parasite_data_size (const GimpParasite *parasite)
+{
+ if (parasite)
+ return parasite->size;
+
+ return 0;
+}
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