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-rw-r--r--libgimpbase/gimpwire.c695
1 files changed, 695 insertions, 0 deletions
diff --git a/libgimpbase/gimpwire.c b/libgimpbase/gimpwire.c
new file mode 100644
index 0000000..9382bee
--- /dev/null
+++ b/libgimpbase/gimpwire.c
@@ -0,0 +1,695 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * 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 <string.h>
+
+#include <glib-object.h>
+
+#include <libgimpcolor/gimpcolortypes.h>
+
+#include "gimpwire.h"
+
+
+typedef struct _GimpWireHandler GimpWireHandler;
+
+struct _GimpWireHandler
+{
+ guint32 type;
+ GimpWireReadFunc read_func;
+ GimpWireWriteFunc write_func;
+ GimpWireDestroyFunc destroy_func;
+};
+
+
+static GHashTable *wire_ht = NULL;
+static GimpWireIOFunc wire_read_func = NULL;
+static GimpWireIOFunc wire_write_func = NULL;
+static GimpWireFlushFunc wire_flush_func = NULL;
+static gboolean wire_error_val = FALSE;
+
+
+static void gimp_wire_init (void);
+
+
+void
+gimp_wire_register (guint32 type,
+ GimpWireReadFunc read_func,
+ GimpWireWriteFunc write_func,
+ GimpWireDestroyFunc destroy_func)
+{
+ GimpWireHandler *handler;
+
+ if (! wire_ht)
+ gimp_wire_init ();
+
+ handler = g_hash_table_lookup (wire_ht, &type);
+
+ if (! handler)
+ handler = g_slice_new0 (GimpWireHandler);
+
+ handler->type = type;
+ handler->read_func = read_func;
+ handler->write_func = write_func;
+ handler->destroy_func = destroy_func;
+
+ g_hash_table_insert (wire_ht, &handler->type, handler);
+}
+
+void
+gimp_wire_set_reader (GimpWireIOFunc read_func)
+{
+ wire_read_func = read_func;
+}
+
+void
+gimp_wire_set_writer (GimpWireIOFunc write_func)
+{
+ wire_write_func = write_func;
+}
+
+void
+gimp_wire_set_flusher (GimpWireFlushFunc flush_func)
+{
+ wire_flush_func = flush_func;
+}
+
+gboolean
+gimp_wire_read (GIOChannel *channel,
+ guint8 *buf,
+ gsize count,
+ gpointer user_data)
+{
+ if (wire_read_func)
+ {
+ if (!(* wire_read_func) (channel, buf, count, user_data))
+ {
+ /* Gives a confusing error message most of the time, disable:
+ g_warning ("%s: gimp_wire_read: error", g_get_prgname ());
+ */
+ wire_error_val = TRUE;
+ return FALSE;
+ }
+ }
+ else
+ {
+ GIOStatus status;
+ GError *error = NULL;
+ gsize bytes;
+
+ while (count > 0)
+ {
+ do
+ {
+ bytes = 0;
+ status = g_io_channel_read_chars (channel,
+ (gchar *) buf, count,
+ &bytes,
+ &error);
+ }
+ while (G_UNLIKELY (status == G_IO_STATUS_AGAIN));
+
+ if (G_UNLIKELY (status != G_IO_STATUS_NORMAL))
+ {
+ if (error)
+ {
+ g_warning ("%s: gimp_wire_read(): error: %s",
+ g_get_prgname (), error->message);
+ g_error_free (error);
+ }
+ else
+ {
+ g_warning ("%s: gimp_wire_read(): error",
+ g_get_prgname ());
+ }
+
+ wire_error_val = TRUE;
+ return FALSE;
+ }
+
+ if (G_UNLIKELY (bytes == 0))
+ {
+ g_warning ("%s: gimp_wire_read(): unexpected EOF",
+ g_get_prgname ());
+ wire_error_val = TRUE;
+ return FALSE;
+ }
+
+ count -= bytes;
+ buf += bytes;
+ }
+ }
+
+ return TRUE;
+}
+
+gboolean
+gimp_wire_write (GIOChannel *channel,
+ const guint8 *buf,
+ gsize count,
+ gpointer user_data)
+{
+ if (wire_write_func)
+ {
+ if (!(* wire_write_func) (channel, (guint8 *) buf, count, user_data))
+ {
+ g_warning ("%s: gimp_wire_write: error", g_get_prgname ());
+ wire_error_val = TRUE;
+ return FALSE;
+ }
+ }
+ else
+ {
+ GIOStatus status;
+ GError *error = NULL;
+ gsize bytes;
+
+ while (count > 0)
+ {
+ do
+ {
+ bytes = 0;
+ status = g_io_channel_write_chars (channel,
+ (const gchar *) buf, count,
+ &bytes,
+ &error);
+ }
+ while (G_UNLIKELY (status == G_IO_STATUS_AGAIN));
+
+ if (G_UNLIKELY (status != G_IO_STATUS_NORMAL))
+ {
+ if (error)
+ {
+ g_warning ("%s: gimp_wire_write(): error: %s",
+ g_get_prgname (), error->message);
+ g_error_free (error);
+ }
+ else
+ {
+ g_warning ("%s: gimp_wire_write(): error",
+ g_get_prgname ());
+ }
+
+ wire_error_val = TRUE;
+ return FALSE;
+ }
+
+ count -= bytes;
+ buf += bytes;
+ }
+ }
+
+ return TRUE;
+}
+
+gboolean
+gimp_wire_flush (GIOChannel *channel,
+ gpointer user_data)
+{
+ if (wire_flush_func)
+ return (* wire_flush_func) (channel, user_data);
+
+ return FALSE;
+}
+
+gboolean
+gimp_wire_error (void)
+{
+ return wire_error_val;
+}
+
+void
+gimp_wire_clear_error (void)
+{
+ wire_error_val = FALSE;
+}
+
+gboolean
+gimp_wire_read_msg (GIOChannel *channel,
+ GimpWireMessage *msg,
+ gpointer user_data)
+{
+ GimpWireHandler *handler;
+
+ if (G_UNLIKELY (! wire_ht))
+ g_error ("gimp_wire_read_msg: the wire protocol has not been initialized");
+
+ if (wire_error_val)
+ return !wire_error_val;
+
+ if (! _gimp_wire_read_int32 (channel, &msg->type, 1, user_data))
+ return FALSE;
+
+ handler = g_hash_table_lookup (wire_ht, &msg->type);
+
+ if (G_UNLIKELY (! handler))
+ g_error ("gimp_wire_read_msg: could not find handler for message: %d",
+ msg->type);
+
+ (* handler->read_func) (channel, msg, user_data);
+
+ return !wire_error_val;
+}
+
+gboolean
+gimp_wire_write_msg (GIOChannel *channel,
+ GimpWireMessage *msg,
+ gpointer user_data)
+{
+ GimpWireHandler *handler;
+
+ if (G_UNLIKELY (! wire_ht))
+ g_error ("gimp_wire_write_msg: the wire protocol has not been initialized");
+
+ if (wire_error_val)
+ return !wire_error_val;
+
+ handler = g_hash_table_lookup (wire_ht, &msg->type);
+
+ if (G_UNLIKELY (! handler))
+ g_error ("gimp_wire_write_msg: could not find handler for message: %d",
+ msg->type);
+
+ if (! _gimp_wire_write_int32 (channel, &msg->type, 1, user_data))
+ return FALSE;
+
+ (* handler->write_func) (channel, msg, user_data);
+
+ return !wire_error_val;
+}
+
+void
+gimp_wire_destroy (GimpWireMessage *msg)
+{
+ GimpWireHandler *handler;
+
+ if (G_UNLIKELY (! wire_ht))
+ g_error ("gimp_wire_destroy: the wire protocol has not been initialized");
+
+ handler = g_hash_table_lookup (wire_ht, &msg->type);
+
+ if (G_UNLIKELY (! handler))
+ g_error ("gimp_wire_destroy: could not find handler for message: %d\n",
+ msg->type);
+
+ (* handler->destroy_func) (msg);
+}
+
+gboolean
+_gimp_wire_read_int64 (GIOChannel *channel,
+ guint64 *data,
+ gint count,
+ gpointer user_data)
+{
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ if (count > 0)
+ {
+ if (! _gimp_wire_read_int8 (channel,
+ (guint8 *) data, count * 8, user_data))
+ return FALSE;
+
+ while (count--)
+ {
+ *data = GUINT64_FROM_BE (*data);
+ data++;
+ }
+ }
+
+ return TRUE;
+}
+
+gboolean
+_gimp_wire_read_int32 (GIOChannel *channel,
+ guint32 *data,
+ gint count,
+ gpointer user_data)
+{
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ if (count > 0)
+ {
+ if (! _gimp_wire_read_int8 (channel,
+ (guint8 *) data, count * 4, user_data))
+ return FALSE;
+
+ while (count--)
+ {
+ *data = g_ntohl (*data);
+ data++;
+ }
+ }
+
+ return TRUE;
+}
+
+gboolean
+_gimp_wire_read_int16 (GIOChannel *channel,
+ guint16 *data,
+ gint count,
+ gpointer user_data)
+{
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ if (count > 0)
+ {
+ if (! _gimp_wire_read_int8 (channel,
+ (guint8 *) data, count * 2, user_data))
+ return FALSE;
+
+ while (count--)
+ {
+ *data = g_ntohs (*data);
+ data++;
+ }
+ }
+
+ return TRUE;
+}
+
+gboolean
+_gimp_wire_read_int8 (GIOChannel *channel,
+ guint8 *data,
+ gint count,
+ gpointer user_data)
+{
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ return gimp_wire_read (channel, data, count, user_data);
+}
+
+gboolean
+_gimp_wire_read_double (GIOChannel *channel,
+ gdouble *data,
+ gint count,
+ gpointer user_data)
+{
+ gdouble *t;
+ guint8 tmp[8];
+ gint i;
+
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ t = (gdouble *) tmp;
+
+ for (i = 0; i < count; i++)
+ {
+#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
+ gint j;
+#endif
+
+ if (! _gimp_wire_read_int8 (channel, tmp, 8, user_data))
+ return FALSE;
+
+#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
+ for (j = 0; j < 4; j++)
+ {
+ guint8 swap;
+
+ swap = tmp[j];
+ tmp[j] = tmp[7 - j];
+ tmp[7 - j] = swap;
+ }
+#endif
+
+ data[i] = *t;
+ }
+
+ return TRUE;
+}
+
+gboolean
+_gimp_wire_read_string (GIOChannel *channel,
+ gchar **data,
+ gint count,
+ gpointer user_data)
+{
+ gint i;
+
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ for (i = 0; i < count; i++)
+ {
+ guint32 tmp;
+
+ if (! _gimp_wire_read_int32 (channel, &tmp, 1, user_data))
+ return FALSE;
+
+ if (tmp > 0)
+ {
+ data[i] = g_try_new (gchar, tmp);
+
+ if (! data[i])
+ {
+ g_printerr ("%s: failed to allocate %u bytes\n", G_STRFUNC, tmp);
+ return FALSE;
+ }
+
+ if (! _gimp_wire_read_int8 (channel,
+ (guint8 *) data[i], tmp, user_data))
+ {
+ g_free (data[i]);
+ return FALSE;
+ }
+
+ /* make sure that the string is NULL-terminated */
+ data[i][tmp - 1] = '\0';
+ }
+ else
+ {
+ data[i] = NULL;
+ }
+ }
+
+ return TRUE;
+}
+
+gboolean
+_gimp_wire_read_color (GIOChannel *channel,
+ GimpRGB *data,
+ gint count,
+ gpointer user_data)
+{
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ return _gimp_wire_read_double (channel,
+ (gdouble *) data, 4 * count, user_data);
+}
+
+gboolean
+_gimp_wire_write_int64 (GIOChannel *channel,
+ const guint64 *data,
+ gint count,
+ gpointer user_data)
+{
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ if (count > 0)
+ {
+ gint i;
+
+ for (i = 0; i < count; i++)
+ {
+ guint64 tmp = GUINT64_TO_BE (data[i]);
+
+ if (! _gimp_wire_write_int8 (channel,
+ (const guint8 *) &tmp, 8, user_data))
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+gboolean
+_gimp_wire_write_int32 (GIOChannel *channel,
+ const guint32 *data,
+ gint count,
+ gpointer user_data)
+{
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ if (count > 0)
+ {
+ gint i;
+
+ for (i = 0; i < count; i++)
+ {
+ guint32 tmp = g_htonl (data[i]);
+
+ if (! _gimp_wire_write_int8 (channel,
+ (const guint8 *) &tmp, 4, user_data))
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+gboolean
+_gimp_wire_write_int16 (GIOChannel *channel,
+ const guint16 *data,
+ gint count,
+ gpointer user_data)
+{
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ if (count > 0)
+ {
+ gint i;
+
+ for (i = 0; i < count; i++)
+ {
+ guint16 tmp = g_htons (data[i]);
+
+ if (! _gimp_wire_write_int8 (channel,
+ (const guint8 *) &tmp, 2, user_data))
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+gboolean
+_gimp_wire_write_int8 (GIOChannel *channel,
+ const guint8 *data,
+ gint count,
+ gpointer user_data)
+{
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ return gimp_wire_write (channel, data, count, user_data);
+}
+
+gboolean
+_gimp_wire_write_double (GIOChannel *channel,
+ const gdouble *data,
+ gint count,
+ gpointer user_data)
+{
+ gdouble *t;
+ guint8 tmp[8];
+ gint i;
+#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
+ gint j;
+#endif
+
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ t = (gdouble *) tmp;
+
+ for (i = 0; i < count; i++)
+ {
+ *t = data[i];
+
+#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
+ for (j = 0; j < 4; j++)
+ {
+ guint8 swap;
+
+ swap = tmp[j];
+ tmp[j] = tmp[7 - j];
+ tmp[7 - j] = swap;
+ }
+#endif
+
+ if (! _gimp_wire_write_int8 (channel, tmp, 8, user_data))
+ return FALSE;
+
+#if 0
+ {
+ gint k;
+
+ g_print ("Wire representation of %f:\t", data[i]);
+
+ for (k = 0; k < 8; k++)
+ g_print ("%02x ", tmp[k]);
+
+ g_print ("\n");
+ }
+#endif
+ }
+
+ return TRUE;
+}
+
+gboolean
+_gimp_wire_write_string (GIOChannel *channel,
+ gchar **data,
+ gint count,
+ gpointer user_data)
+{
+ gint i;
+
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ for (i = 0; i < count; i++)
+ {
+ guint32 tmp;
+
+ if (data[i])
+ tmp = strlen (data[i]) + 1;
+ else
+ tmp = 0;
+
+ if (! _gimp_wire_write_int32 (channel, &tmp, 1, user_data))
+ return FALSE;
+
+ if (tmp > 0)
+ if (! _gimp_wire_write_int8 (channel,
+ (const guint8 *) data[i], tmp, user_data))
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+gboolean
+_gimp_wire_write_color (GIOChannel *channel,
+ const GimpRGB *data,
+ gint count,
+ gpointer user_data)
+{
+ g_return_val_if_fail (count >= 0, FALSE);
+
+ return _gimp_wire_write_double (channel,
+ (gdouble *) data, 4 * count, user_data);
+}
+
+static guint
+gimp_wire_hash (const guint32 *key)
+{
+ return *key;
+}
+
+static gboolean
+gimp_wire_compare (const guint32 *a,
+ const guint32 *b)
+{
+ return (*a == *b);
+}
+
+static void
+gimp_wire_init (void)
+{
+ if (! wire_ht)
+ wire_ht = g_hash_table_new ((GHashFunc) gimp_wire_hash,
+ (GCompareFunc) gimp_wire_compare);
+}