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- /* 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 2 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, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
- #include "config.h"
-
- #include <errno.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #ifdef HAVE_SYS_PARAM_H
- #include <sys/param.h>
- #endif
- #include <sys/types.h>
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
-
- #ifdef G_OS_WIN32
- #include <process.h>
- #include <io.h>
- #endif
-
- #include <glib.h>
-
- #include "gimpwire.h"
-
-
- typedef struct _WireHandler WireHandler;
-
- struct _WireHandler
- {
- guint32 type;
- WireReadFunc read_func;
- WireWriteFunc write_func;
- WireDestroyFunc destroy_func;
- };
-
-
- static void wire_init (void);
- static guint wire_hash (guint32 *key);
- static gboolean wire_compare (guint32 *a,
- guint32 *b);
-
-
- static GHashTable *wire_ht = NULL;
- static WireIOFunc wire_read_func = NULL;
- static WireIOFunc wire_write_func = NULL;
- static WireFlushFunc wire_flush_func = NULL;
- static gboolean wire_error_val = FALSE;
-
-
- void
- wire_register (guint32 type,
- WireReadFunc read_func,
- WireWriteFunc write_func,
- WireDestroyFunc destroy_func)
- {
- WireHandler *handler;
-
- if (!wire_ht)
- wire_init ();
-
- handler = g_hash_table_lookup (wire_ht, &type);
- if (!handler)
- handler = g_new (WireHandler, 1);
-
- 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
- wire_set_reader (WireIOFunc read_func)
- {
- wire_read_func = read_func;
- }
-
- void
- wire_set_writer (WireIOFunc write_func)
- {
- wire_write_func = write_func;
- }
-
- void
- wire_set_flusher (WireFlushFunc flush_func)
- {
- wire_flush_func = flush_func;
- }
-
- gboolean
- wire_read (GIOChannel *channel,
- guint8 *buf,
- gulong count)
- {
- if (wire_read_func)
- {
- if (!(* wire_read_func) (channel, buf, count))
- {
- g_warning ("%s: wire_read: error", g_get_prgname ());
- wire_error_val = TRUE;
- return FALSE;
- }
- }
- else
- {
- GIOError error;
- guint bytes;
-
- while (count > 0)
- {
- do
- {
- bytes = 0;
- error = g_io_channel_read (channel, (char*) buf, count, &bytes);
- }
- while ((error == G_IO_ERROR_AGAIN) ||
- (error == G_IO_ERROR_UNKNOWN && errno == EINTR));
-
- if (error != G_IO_ERROR_NONE)
- {
- g_warning ("%s: wire_read: error", g_get_prgname ());
- wire_error_val = TRUE;
- return FALSE;
- }
-
- if (bytes == 0)
- {
- g_warning ("%s: wire_read: unexpected EOF", g_get_prgname ());
- wire_error_val = TRUE;
- return FALSE;
- }
-
- count -= bytes;
- buf += bytes;
- }
- }
-
- return TRUE;
- }
-
- gboolean
- wire_write (GIOChannel *channel,
- guint8 *buf,
- gulong count)
- {
- if (wire_write_func)
- {
- if (!(* wire_write_func) (channel, buf, count))
- {
- g_warning ("%s: wire_write: error", g_get_prgname ());
- wire_error_val = TRUE;
- return FALSE;
- }
- }
- else
- {
- GIOError error;
- guint bytes;
-
- while (count > 0)
- {
- do
- {
- bytes = 0;
- error = g_io_channel_write (channel, (char*) buf, count, &bytes);
- }
- while ((error == G_IO_ERROR_AGAIN) ||
- (error == G_IO_ERROR_UNKNOWN && errno == EINTR));
-
- if (error != G_IO_ERROR_NONE)
- {
- g_warning ("%s: wire_write: error", g_get_prgname ());
- wire_error_val = TRUE;
- return FALSE;
- }
-
- count -= bytes;
- buf += bytes;
- }
- }
-
- return TRUE;
- }
-
- gboolean
- wire_flush (GIOChannel *channel)
- {
- if (wire_flush_func)
- return (* wire_flush_func) (channel);
-
- return FALSE;
- }
-
- gboolean
- wire_error (void)
- {
- return wire_error_val;
- }
-
- void
- wire_clear_error (void)
- {
- wire_error_val = FALSE;
- }
-
- gboolean
- wire_read_msg (GIOChannel *channel,
- WireMessage *msg)
- {
- WireHandler *handler;
-
- if (wire_error_val)
- return !wire_error_val;
-
- if (!wire_read_int32 (channel, &msg->type, 1))
- return FALSE;
-
- handler = g_hash_table_lookup (wire_ht, &msg->type);
- if (!handler)
- g_error ("could not find handler for message: %d", msg->type);
-
- (* handler->read_func) (channel, msg);
-
- return !wire_error_val;
- }
-
- gboolean
- wire_write_msg (GIOChannel *channel,
- WireMessage *msg)
- {
- WireHandler *handler;
-
- if (wire_error_val)
- return !wire_error_val;
-
- handler = g_hash_table_lookup (wire_ht, &msg->type);
- if (!handler)
- g_error ("could not find handler for message: %d", msg->type);
-
- if (!wire_write_int32 (channel, &msg->type, 1))
- return FALSE;
-
- (* handler->write_func) (channel, msg);
-
- return !wire_error_val;
- }
-
- void
- wire_destroy (WireMessage *msg)
- {
- WireHandler *handler;
-
- handler = g_hash_table_lookup (wire_ht, &msg->type);
- if (!handler)
- g_error ("could not find handler for message: %d\n", msg->type);
-
- (* handler->destroy_func) (msg);
- }
-
- gboolean
- wire_read_int32 (GIOChannel *channel,
- guint32 *data,
- gint count)
- {
- if (count > 0)
- {
- if (!wire_read_int8 (channel, (guint8*) data, count * 4))
- return FALSE;
-
- while (count--)
- {
- *data = g_ntohl (*data);
- data++;
- }
- }
-
- return TRUE;
- }
-
- gboolean
- wire_read_int16 (GIOChannel *channel,
- guint16 *data,
- gint count)
- {
- if (count > 0)
- {
- if (!wire_read_int8 (channel, (guint8*) data, count * 2))
- return FALSE;
-
- while (count--)
- {
- *data = g_ntohs (*data);
- data++;
- }
- }
-
- return TRUE;
- }
-
- gboolean
- wire_read_int8 (GIOChannel *channel,
- guint8 *data,
- gint count)
- {
- return wire_read (channel, data, count);
- }
-
- gboolean
- wire_read_double (GIOChannel *channel,
- gdouble *data,
- gint count)
- {
- gchar *str;
- gint i;
-
- for (i = 0; i < count; i++)
- {
- if (!wire_read_string (channel, &str, 1))
- return FALSE;
- sscanf (str, "%le", &data[i]);
- g_free (str);
- }
-
- return TRUE;
- }
-
- gboolean
- wire_read_string (GIOChannel *channel,
- gchar **data,
- gint count)
- {
- guint32 tmp;
- gint i;
-
- for (i = 0; i < count; i++)
- {
- if (!wire_read_int32 (channel, &tmp, 1))
- return FALSE;
-
- if (tmp > 0)
- {
- data[i] = g_new (gchar, tmp);
- if (!wire_read_int8 (channel, (guint8*) data[i], tmp))
- {
- g_free (data[i]);
- return FALSE;
- }
- }
- else
- {
- data[i] = NULL;
- }
- }
-
- return TRUE;
- }
-
- gboolean
- wire_write_int32 (GIOChannel *channel,
- guint32 *data,
- gint count)
- {
- guint32 tmp;
- gint i;
-
- if (count > 0)
- {
- for (i = 0; i < count; i++)
- {
- tmp = g_htonl (data[i]);
- if (!wire_write_int8 (channel, (guint8*) &tmp, 4))
- return FALSE;
- }
- }
-
- return TRUE;
- }
-
- gboolean
- wire_write_int16 (GIOChannel *channel,
- guint16 *data,
- gint count)
- {
- guint16 tmp;
- gint i;
-
- if (count > 0)
- {
- for (i = 0; i < count; i++)
- {
- tmp = g_htons (data[i]);
- if (!wire_write_int8 (channel, (guint8*) &tmp, 2))
- return FALSE;
- }
- }
-
- return TRUE;
- }
-
- gboolean
- wire_write_int8 (GIOChannel *channel,
- guint8 *data,
- gint count)
- {
- return wire_write (channel, data, count);
- }
-
- gboolean
- wire_write_double (GIOChannel *channel,
- gdouble *data,
- gint count)
- {
- gchar *t;
- gchar buf[128];
- gint i;
-
- t = buf;
- for (i = 0; i < count; i++)
- {
- g_snprintf (buf, sizeof (buf), "%0.50e", data[i]);
- if (!wire_write_string (channel, &t, 1))
- return FALSE;
- }
-
- return TRUE;
- }
-
- gboolean
- wire_write_string (GIOChannel *channel,
- gchar **data,
- gint count)
- {
- guint32 tmp;
- gint i;
-
- for (i = 0; i < count; i++)
- {
- if (data[i])
- tmp = strlen (data[i]) + 1;
- else
- tmp = 0;
-
- if (!wire_write_int32 (channel, &tmp, 1))
- return FALSE;
- if (tmp > 0)
- if (!wire_write_int8 (channel, (guint8*) data[i], tmp))
- return FALSE;
- }
-
- return TRUE;
- }
-
- static void
- wire_init (void)
- {
- if (!wire_ht)
- {
- wire_ht = g_hash_table_new ((GHashFunc) wire_hash,
- (GCompareFunc) wire_compare);
- }
- }
-
- static guint
- wire_hash (guint32 *key)
- {
- return *key;
- }
-
- static gboolean
- wire_compare (guint32 *a,
- guint32 *b)
- {
- return (*a == *b);
- }
-