mirror of https://github.com/GNOME/gimp.git
467 lines
8.0 KiB
C
467 lines
8.0 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 Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 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 Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "gimpwire.h"
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typedef struct _WireHandler WireHandler;
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struct _WireHandler
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{
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guint32 type;
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WireReadFunc read_func;
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WireWriteFunc write_func;
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WireDestroyFunc destroy_func;
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};
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static void wire_init (void);
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static guint wire_hash (guint32 *key);
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static gint wire_compare (guint32 *a,
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guint32 *b);
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static GHashTable *wire_ht = NULL;
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static WireIOFunc wire_read_func = NULL;
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static WireIOFunc wire_write_func = NULL;
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static WireFlushFunc wire_flush_func = NULL;
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static int wire_error_val = FALSE;
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void
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wire_register (guint32 type,
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WireReadFunc read_func,
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WireWriteFunc write_func,
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WireDestroyFunc destroy_func)
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{
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WireHandler *handler;
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if (!wire_ht)
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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_new (WireHandler, 1);
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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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wire_set_reader (WireIOFunc 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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wire_set_writer (WireIOFunc 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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wire_set_flusher (WireFlushFunc flush_func)
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{
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wire_flush_func = flush_func;
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}
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int
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wire_read (int fd,
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guint8 *buf,
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gulong count)
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{
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if (wire_read_func)
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{
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if (!(* wire_read_func) (fd, buf, count))
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{
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g_print ("wire_read: error\n");
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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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int bytes;
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while (count > 0)
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{
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do {
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bytes = read (fd, (char*) buf, count);
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} while ((bytes == -1) && ((errno == EAGAIN) || (errno == EINTR)));
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if (bytes == -1)
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{
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g_print ("wire_read: error\n");
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wire_error_val = TRUE;
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return FALSE;
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}
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if (bytes == 0)
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{
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g_print ("wire_read: unexpected EOF (plug-in crashed?)\n");
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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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int
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wire_write (int fd,
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guint8 *buf,
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gulong count)
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{
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if (wire_write_func)
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{
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if (!(* wire_write_func) (fd, buf, count))
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{
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g_print ("wire_write: error\n");
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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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int bytes;
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while (count > 0)
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{
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do {
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bytes = write (fd, (char*) buf, count);
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} while ((bytes == -1) && ((errno == EAGAIN) || (errno == EINTR)));
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if (bytes == -1)
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{
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g_print ("wire_write: error\n");
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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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int
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wire_flush (int fd)
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{
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if (wire_flush_func)
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return (* wire_flush_func) (fd);
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return FALSE;
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}
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int
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wire_error ()
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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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wire_clear_error ()
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{
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wire_error_val = FALSE;
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}
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int
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wire_read_msg (int fd,
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WireMessage *msg)
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{
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WireHandler *handler;
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if (wire_error_val)
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return !wire_error_val;
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if (!wire_read_int32 (fd, &msg->type, 1))
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return FALSE;
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handler = g_hash_table_lookup (wire_ht, &msg->type);
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if (!handler)
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g_error ("could not find handler for message: %d\n", msg->type);
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(* handler->read_func) (fd, msg);
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return !wire_error_val;
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}
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int
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wire_write_msg (int fd,
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WireMessage *msg)
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{
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WireHandler *handler;
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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 (!handler)
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g_error ("could not find handler for message: %d\n", msg->type);
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if (!wire_write_int32 (fd, &msg->type, 1))
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return FALSE;
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(* handler->write_func) (fd, msg);
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return !wire_error_val;
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}
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void
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wire_destroy (WireMessage *msg)
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{
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WireHandler *handler;
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handler = g_hash_table_lookup (wire_ht, &msg->type);
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if (!handler)
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g_error ("could not find handler for message: %d\n", msg->type);
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(* handler->destroy_func) (msg);
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}
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int
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wire_read_int32 (int fd,
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guint32 *data,
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gint count)
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{
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if (count > 0)
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{
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if (!wire_read_int8 (fd, (guint8*) data, count * 4))
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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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int
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wire_read_int16 (int fd,
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guint16 *data,
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gint count)
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{
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if (count > 0)
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{
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if (!wire_read_int8 (fd, (guint8*) data, count * 2))
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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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int
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wire_read_int8 (int fd,
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guint8 *data,
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gint count)
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{
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return wire_read (fd, data, count);
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}
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int
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wire_read_double (int fd,
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gdouble *data,
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gint count)
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{
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char *str;
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int i;
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for (i = 0; i < count; i++)
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{
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if (!wire_read_string (fd, &str, 1))
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return FALSE;
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sscanf (str, "%le", &data[i]);
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g_free (str);
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}
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return TRUE;
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}
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int
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wire_read_string (int fd,
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gchar **data,
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gint count)
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{
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guint32 tmp;
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int i;
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for (i = 0; i < count; i++)
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{
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if (!wire_read_int32 (fd, &tmp, 1))
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return FALSE;
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if (tmp > 0)
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{
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data[i] = g_new (gchar, tmp);
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if (!wire_read_int8 (fd, (guint8*) data[i], tmp))
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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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}
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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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int
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wire_write_int32 (int fd,
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guint32 *data,
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gint count)
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{
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guint32 tmp;
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int i;
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if (count > 0)
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{
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for (i = 0; i < count; i++)
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{
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tmp = g_htonl (data[i]);
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if (!wire_write_int8 (fd, (guint8*) &tmp, 4))
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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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int
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wire_write_int16 (int fd,
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guint16 *data,
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gint count)
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{
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guint16 tmp;
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int i;
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if (count > 0)
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{
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for (i = 0; i < count; i++)
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{
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tmp = g_htons (data[i]);
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if (!wire_write_int8 (fd, (guint8*) &tmp, 2))
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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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int
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wire_write_int8 (int fd,
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guint8 *data,
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gint count)
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{
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return wire_write (fd, data, count);
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}
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int
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wire_write_double (int fd,
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gdouble *data,
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gint count)
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{
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gchar *t, buf[128];
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int i;
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t = buf;
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for (i = 0; i < count; i++)
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{
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sprintf (buf, "%0.50e", data[i]);
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if (!wire_write_string (fd, &t, 1))
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return FALSE;
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}
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return TRUE;
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}
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int
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wire_write_string (int fd,
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gchar **data,
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gint count)
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{
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guint32 tmp;
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int i;
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for (i = 0; i < count; i++)
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{
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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 (!wire_write_int32 (fd, &tmp, 1))
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return FALSE;
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if (tmp > 0)
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if (!wire_write_int8 (fd, (guint8*) data[i], tmp))
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return FALSE;
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}
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return TRUE;
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}
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static void
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wire_init ()
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{
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if (!wire_ht)
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{
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wire_ht = g_hash_table_new ((GHashFunc) wire_hash,
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(GCompareFunc) wire_compare);
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}
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}
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static guint
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wire_hash (guint32 *key)
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{
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return *key;
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}
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static gint
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wire_compare (guint32 *a,
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guint32 *b)
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{
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return (*a == *b);
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}
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