mirror of https://github.com/GNOME/gimp.git
647 lines
15 KiB
C
647 lines
15 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* This library is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <glib-object.h>
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#include <libgimpcolor/gimpcolortypes.h>
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#include "gimpwire.h"
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typedef struct _GimpWireHandler GimpWireHandler;
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struct _GimpWireHandler
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{
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guint32 type;
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GimpWireReadFunc read_func;
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GimpWireWriteFunc write_func;
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GimpWireDestroyFunc destroy_func;
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};
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static GHashTable *wire_ht = NULL;
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static GimpWireIOFunc wire_read_func = NULL;
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static GimpWireIOFunc wire_write_func = NULL;
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static GimpWireFlushFunc wire_flush_func = NULL;
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static gboolean wire_error_val = FALSE;
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static void gimp_wire_init (void);
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void
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gimp_wire_register (guint32 type,
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GimpWireReadFunc read_func,
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GimpWireWriteFunc write_func,
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GimpWireDestroyFunc destroy_func)
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{
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GimpWireHandler *handler;
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if (! wire_ht)
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gimp_wire_init ();
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handler = g_hash_table_lookup (wire_ht, &type);
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if (! handler)
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handler = g_slice_new0 (GimpWireHandler);
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handler->type = type;
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handler->read_func = read_func;
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handler->write_func = write_func;
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handler->destroy_func = destroy_func;
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g_hash_table_insert (wire_ht, &handler->type, handler);
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}
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void
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gimp_wire_set_reader (GimpWireIOFunc read_func)
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{
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wire_read_func = read_func;
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}
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void
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gimp_wire_set_writer (GimpWireIOFunc write_func)
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{
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wire_write_func = write_func;
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}
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void
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gimp_wire_set_flusher (GimpWireFlushFunc flush_func)
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{
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wire_flush_func = flush_func;
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}
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gboolean
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gimp_wire_read (GIOChannel *channel,
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guint8 *buf,
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gsize count,
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gpointer user_data)
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{
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if (wire_read_func)
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{
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if (!(* wire_read_func) (channel, buf, count, user_data))
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{
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/* Gives a confusing error message most of the time, disable:
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g_warning ("%s: gimp_wire_read: error", g_get_prgname ());
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*/
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wire_error_val = TRUE;
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return FALSE;
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}
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}
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else
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{
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GIOStatus status;
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GError *error = NULL;
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gsize bytes;
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while (count > 0)
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{
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do
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{
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bytes = 0;
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status = g_io_channel_read_chars (channel,
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(gchar *) buf, count,
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&bytes,
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&error);
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}
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while (G_UNLIKELY (status == G_IO_STATUS_AGAIN));
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if (G_UNLIKELY (status != G_IO_STATUS_NORMAL))
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{
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if (error)
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{
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g_warning ("%s: gimp_wire_read(): error: %s",
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g_get_prgname (), error->message);
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g_error_free (error);
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}
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else
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{
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g_warning ("%s: gimp_wire_read(): error",
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g_get_prgname ());
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}
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wire_error_val = TRUE;
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return FALSE;
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}
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if (G_UNLIKELY (bytes == 0))
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{
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g_warning ("%s: gimp_wire_read(): unexpected EOF",
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g_get_prgname ());
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wire_error_val = TRUE;
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return FALSE;
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}
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count -= bytes;
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buf += bytes;
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}
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}
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return TRUE;
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}
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gboolean
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gimp_wire_write (GIOChannel *channel,
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const guint8 *buf,
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gsize count,
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gpointer user_data)
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{
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if (wire_write_func)
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{
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if (!(* wire_write_func) (channel, (guint8 *) buf, count, user_data))
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{
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g_warning ("%s: gimp_wire_write: error", g_get_prgname ());
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wire_error_val = TRUE;
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return FALSE;
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}
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}
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else
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{
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GIOStatus status;
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GError *error = NULL;
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gsize bytes;
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while (count > 0)
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{
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do
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{
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bytes = 0;
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status = g_io_channel_write_chars (channel,
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(const gchar *) buf, count,
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&bytes,
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&error);
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}
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while (G_UNLIKELY (status == G_IO_STATUS_AGAIN));
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if (G_UNLIKELY (status != G_IO_STATUS_NORMAL))
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{
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if (error)
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{
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g_warning ("%s: gimp_wire_write(): error: %s",
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g_get_prgname (), error->message);
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g_error_free (error);
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}
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else
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{
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g_warning ("%s: gimp_wire_write(): error",
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g_get_prgname ());
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}
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wire_error_val = TRUE;
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return FALSE;
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}
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count -= bytes;
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buf += bytes;
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}
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}
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return TRUE;
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}
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gboolean
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gimp_wire_flush (GIOChannel *channel,
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gpointer user_data)
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{
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if (wire_flush_func)
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return (* wire_flush_func) (channel, user_data);
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return FALSE;
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}
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gboolean
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gimp_wire_error (void)
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{
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return wire_error_val;
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}
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void
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gimp_wire_clear_error (void)
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{
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wire_error_val = FALSE;
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}
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gboolean
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gimp_wire_read_msg (GIOChannel *channel,
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GimpWireMessage *msg,
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gpointer user_data)
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{
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GimpWireHandler *handler;
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if (G_UNLIKELY (! wire_ht))
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g_error ("gimp_wire_read_msg: the wire protocol has not been initialized");
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if (wire_error_val)
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return !wire_error_val;
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if (! _gimp_wire_read_int32 (channel, &msg->type, 1, user_data))
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return FALSE;
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handler = g_hash_table_lookup (wire_ht, &msg->type);
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if (G_UNLIKELY (! handler))
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g_error ("gimp_wire_read_msg: could not find handler for message: %d",
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msg->type);
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(* handler->read_func) (channel, msg, user_data);
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return !wire_error_val;
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}
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gboolean
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gimp_wire_write_msg (GIOChannel *channel,
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GimpWireMessage *msg,
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gpointer user_data)
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{
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GimpWireHandler *handler;
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if (G_UNLIKELY (! wire_ht))
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g_error ("gimp_wire_write_msg: the wire protocol has not been initialized");
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if (wire_error_val)
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return !wire_error_val;
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handler = g_hash_table_lookup (wire_ht, &msg->type);
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if (G_UNLIKELY (! handler))
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g_error ("gimp_wire_write_msg: could not find handler for message: %d",
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msg->type);
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if (! _gimp_wire_write_int32 (channel, &msg->type, 1, user_data))
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return FALSE;
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(* handler->write_func) (channel, msg, user_data);
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return !wire_error_val;
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}
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void
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gimp_wire_destroy (GimpWireMessage *msg)
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{
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GimpWireHandler *handler;
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if (G_UNLIKELY (! wire_ht))
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g_error ("gimp_wire_destroy: the wire protocol has not been initialized");
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handler = g_hash_table_lookup (wire_ht, &msg->type);
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if (G_UNLIKELY (! handler))
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g_error ("gimp_wire_destroy: could not find handler for message: %d\n",
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msg->type);
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(* handler->destroy_func) (msg);
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}
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gboolean
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_gimp_wire_read_int32 (GIOChannel *channel,
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guint32 *data,
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gint count,
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gpointer user_data)
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{
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g_return_val_if_fail (count >= 0, FALSE);
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if (count > 0)
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{
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if (! _gimp_wire_read_int8 (channel,
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(guint8 *) data, count * 4, user_data))
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return FALSE;
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while (count--)
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{
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*data = g_ntohl (*data);
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data++;
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}
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}
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return TRUE;
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}
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gboolean
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_gimp_wire_read_int16 (GIOChannel *channel,
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guint16 *data,
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gint count,
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gpointer user_data)
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{
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g_return_val_if_fail (count >= 0, FALSE);
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if (count > 0)
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{
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if (! _gimp_wire_read_int8 (channel,
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(guint8 *) data, count * 2, user_data))
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return FALSE;
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while (count--)
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{
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*data = g_ntohs (*data);
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data++;
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}
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}
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return TRUE;
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}
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gboolean
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_gimp_wire_read_int8 (GIOChannel *channel,
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guint8 *data,
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gint count,
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gpointer user_data)
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{
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g_return_val_if_fail (count >= 0, FALSE);
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return gimp_wire_read (channel, data, count, user_data);
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}
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gboolean
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_gimp_wire_read_double (GIOChannel *channel,
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gdouble *data,
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gint count,
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gpointer user_data)
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{
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gdouble *t;
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guint8 tmp[8];
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gint i;
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g_return_val_if_fail (count >= 0, FALSE);
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t = (gdouble *) tmp;
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for (i = 0; i < count; i++)
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{
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#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
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gint j;
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#endif
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if (! _gimp_wire_read_int8 (channel, tmp, 8, user_data))
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return FALSE;
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#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
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for (j = 0; j < 4; j++)
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{
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guint8 swap;
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swap = tmp[j];
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tmp[j] = tmp[7 - j];
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tmp[7 - j] = swap;
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}
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#endif
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data[i] = *t;
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}
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return TRUE;
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}
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gboolean
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_gimp_wire_read_string (GIOChannel *channel,
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gchar **data,
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gint count,
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gpointer user_data)
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{
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gint i;
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g_return_val_if_fail (count >= 0, FALSE);
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for (i = 0; i < count; i++)
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{
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guint32 tmp;
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if (! _gimp_wire_read_int32 (channel, &tmp, 1, user_data))
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return FALSE;
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if (tmp > 0)
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{
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data[i] = g_try_new (gchar, tmp);
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if (! data[i])
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{
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g_printerr ("%s: failed to allocate %u bytes\n", G_STRFUNC, tmp);
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return FALSE;
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}
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if (! _gimp_wire_read_int8 (channel,
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(guint8 *) data[i], tmp, user_data))
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{
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g_free (data[i]);
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return FALSE;
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}
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/* make sure that the string is NULL-terminated */
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data[i][tmp - 1] = '\0';
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}
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else
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{
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data[i] = NULL;
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}
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}
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return TRUE;
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}
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gboolean
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_gimp_wire_read_color (GIOChannel *channel,
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GimpRGB *data,
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gint count,
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gpointer user_data)
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{
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g_return_val_if_fail (count >= 0, FALSE);
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return _gimp_wire_read_double (channel,
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(gdouble *) data, 4 * count, user_data);
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}
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gboolean
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_gimp_wire_write_int32 (GIOChannel *channel,
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const guint32 *data,
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gint count,
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gpointer user_data)
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{
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g_return_val_if_fail (count >= 0, FALSE);
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if (count > 0)
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{
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gint i;
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for (i = 0; i < count; i++)
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{
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guint32 tmp = g_htonl (data[i]);
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if (! _gimp_wire_write_int8 (channel,
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(const guint8 *) &tmp, 4, user_data))
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return FALSE;
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}
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}
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return TRUE;
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}
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gboolean
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_gimp_wire_write_int16 (GIOChannel *channel,
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const guint16 *data,
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gint count,
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gpointer user_data)
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{
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g_return_val_if_fail (count >= 0, FALSE);
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if (count > 0)
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{
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gint i;
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for (i = 0; i < count; i++)
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{
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guint16 tmp = g_htons (data[i]);
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if (! _gimp_wire_write_int8 (channel,
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(const guint8 *) &tmp, 2, user_data))
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return FALSE;
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}
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}
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return TRUE;
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}
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gboolean
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_gimp_wire_write_int8 (GIOChannel *channel,
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const guint8 *data,
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gint count,
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gpointer user_data)
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{
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g_return_val_if_fail (count >= 0, FALSE);
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return gimp_wire_write (channel, data, count, user_data);
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}
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gboolean
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_gimp_wire_write_double (GIOChannel *channel,
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const gdouble *data,
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gint count,
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gpointer user_data)
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{
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gdouble *t;
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guint8 tmp[8];
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gint i;
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#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
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gint j;
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#endif
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g_return_val_if_fail (count >= 0, FALSE);
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t = (gdouble *) tmp;
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for (i = 0; i < count; i++)
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{
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*t = data[i];
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#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
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for (j = 0; j < 4; j++)
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{
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guint8 swap;
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swap = tmp[j];
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tmp[j] = tmp[7 - j];
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tmp[7 - j] = swap;
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}
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#endif
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if (! _gimp_wire_write_int8 (channel, tmp, 8, user_data))
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return FALSE;
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#if 0
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{
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gint k;
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g_print ("Wire representation of %f:\t", data[i]);
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for (k = 0; k < 8; k++)
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g_print ("%02x ", tmp[k]);
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g_print ("\n");
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}
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#endif
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}
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return TRUE;
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}
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gboolean
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_gimp_wire_write_string (GIOChannel *channel,
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gchar **data,
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gint count,
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gpointer user_data)
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{
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gint i;
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g_return_val_if_fail (count >= 0, FALSE);
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for (i = 0; i < count; i++)
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{
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guint32 tmp;
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if (data[i])
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tmp = strlen (data[i]) + 1;
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else
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tmp = 0;
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if (! _gimp_wire_write_int32 (channel, &tmp, 1, user_data))
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return FALSE;
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if (tmp > 0)
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if (! _gimp_wire_write_int8 (channel,
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(const guint8 *) data[i], tmp, user_data))
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return FALSE;
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}
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return TRUE;
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}
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|
|
|
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);
|
|
}
|