mirror of https://github.com/GNOME/gimp.git
484 lines
8.2 KiB
C
484 lines
8.2 KiB
C
/* 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 "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 gint 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 int 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;
|
|
}
|
|
|
|
int
|
|
wire_read (GIOChannel *channel,
|
|
guint8 *buf,
|
|
gulong count)
|
|
{
|
|
if (wire_read_func)
|
|
{
|
|
if (!(* wire_read_func) (channel, buf, count))
|
|
{
|
|
g_warning ("wire_read: error");
|
|
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);
|
|
|
|
if (error != G_IO_ERROR_NONE)
|
|
{
|
|
g_warning ("wire_read: error");
|
|
wire_error_val = TRUE;
|
|
return FALSE;
|
|
}
|
|
|
|
if (bytes == 0)
|
|
{
|
|
g_warning ("wire_read: unexpected EOF (plug-in crashed?)");
|
|
wire_error_val = TRUE;
|
|
return FALSE;
|
|
}
|
|
|
|
count -= bytes;
|
|
buf += bytes;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
int
|
|
wire_write (GIOChannel *channel,
|
|
guint8 *buf,
|
|
gulong count)
|
|
{
|
|
if (wire_write_func)
|
|
{
|
|
if (!(* wire_write_func) (channel, buf, count))
|
|
{
|
|
g_warning ("wire_write: error");
|
|
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);
|
|
|
|
if (error != G_IO_ERROR_NONE)
|
|
{
|
|
g_warning ("wire_write: error");
|
|
wire_error_val = TRUE;
|
|
return FALSE;
|
|
}
|
|
|
|
count -= bytes;
|
|
buf += bytes;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
int
|
|
wire_flush (GIOChannel *channel)
|
|
{
|
|
if (wire_flush_func)
|
|
return (* wire_flush_func) (channel);
|
|
return FALSE;
|
|
}
|
|
|
|
int
|
|
wire_error ()
|
|
{
|
|
return wire_error_val;
|
|
}
|
|
|
|
void
|
|
wire_clear_error ()
|
|
{
|
|
wire_error_val = FALSE;
|
|
}
|
|
|
|
int
|
|
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;
|
|
}
|
|
|
|
int
|
|
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);
|
|
}
|
|
|
|
int
|
|
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;
|
|
}
|
|
|
|
int
|
|
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;
|
|
}
|
|
|
|
int
|
|
wire_read_int8 (GIOChannel *channel,
|
|
guint8 *data,
|
|
gint count)
|
|
{
|
|
return wire_read (channel, data, count);
|
|
}
|
|
|
|
int
|
|
wire_read_double (GIOChannel *channel,
|
|
gdouble *data,
|
|
gint count)
|
|
{
|
|
char *str;
|
|
int 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;
|
|
}
|
|
|
|
int
|
|
wire_read_string (GIOChannel *channel,
|
|
gchar **data,
|
|
gint count)
|
|
{
|
|
guint32 tmp;
|
|
int 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;
|
|
}
|
|
|
|
int
|
|
wire_write_int32 (GIOChannel *channel,
|
|
guint32 *data,
|
|
gint count)
|
|
{
|
|
guint32 tmp;
|
|
int 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;
|
|
}
|
|
|
|
int
|
|
wire_write_int16 (GIOChannel *channel,
|
|
guint16 *data,
|
|
gint count)
|
|
{
|
|
guint16 tmp;
|
|
int 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;
|
|
}
|
|
|
|
int
|
|
wire_write_int8 (GIOChannel *channel,
|
|
guint8 *data,
|
|
gint count)
|
|
{
|
|
return wire_write (channel, data, count);
|
|
}
|
|
|
|
int
|
|
wire_write_double (GIOChannel *channel,
|
|
gdouble *data,
|
|
gint count)
|
|
{
|
|
gchar *t, buf[128];
|
|
int i;
|
|
|
|
t = buf;
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
sprintf (buf, "%0.50e", data[i]);
|
|
if (!wire_write_string (channel, &t, 1))
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
int
|
|
wire_write_string (GIOChannel *channel,
|
|
gchar **data,
|
|
gint count)
|
|
{
|
|
guint32 tmp;
|
|
int 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 ()
|
|
{
|
|
if (!wire_ht)
|
|
{
|
|
wire_ht = g_hash_table_new ((GHashFunc) wire_hash,
|
|
(GCompareFunc) wire_compare);
|
|
}
|
|
}
|
|
|
|
static guint
|
|
wire_hash (guint32 *key)
|
|
{
|
|
return *key;
|
|
}
|
|
|
|
static gint
|
|
wire_compare (guint32 *a,
|
|
guint32 *b)
|
|
{
|
|
return (*a == *b);
|
|
}
|