gimp/libgimp/parasite.c

187 lines
3.7 KiB
C

/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* parasite.c
* Copyright (C) 1998 Jay Cox <jaycox@earthlink.net>
*
* 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 "parasiteP.h"
#include "parasite.h"
#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <glib.h>
#ifdef G_OS_WIN32
#include <process.h> /* For _getpid() */
#endif
#ifdef DEBUG
static void
parasite_print (Parasite *p)
{
if (p == NULL)
{
printf("(pid %d)attempt to print a null parasite\n", getpid());
return;
}
printf("(pid %d), parasite: %p\n", getpid(), p);
if (p->name)
printf("\tname: %s\n", p->name);
else
printf("\tname: NULL\n");
printf("\tflags: %d\n", p->flags);
printf("\tsize: %d\n", p->size);
if (p->size > 0)
printf("\tdata: %p\n", p->data);
}
#endif
Parasite *
parasite_new (const gchar *name,
guint32 flags,
guint32 size,
const gpointer data)
{
Parasite *p;
p = g_new (Parasite, 1);
if (name)
p->name = g_strdup (name);
else
{
g_free (p);
return NULL;
}
p->flags = (flags & 0xFF);
p->size = size;
if (size)
p->data = g_memdup (data, size);
else
p->data = NULL;
return p;
}
void
parasite_free (Parasite *parasite)
{
if (parasite == NULL)
return;
if (parasite->name)
g_free (parasite->name);
if (parasite->data)
g_free (parasite->data);
g_free (parasite);
}
int
parasite_is_type (const Parasite *parasite,
const gchar *name)
{
if (!parasite || !parasite->name)
return FALSE;
return (strcmp(parasite->name, name) == 0);
}
Parasite *
parasite_copy (const Parasite *parasite)
{
if (parasite == NULL)
return NULL;
return parasite_new (parasite->name, parasite->flags,
parasite->size, parasite->data);
}
gboolean
parasite_compare (const Parasite *a,
const Parasite *b)
{
if (a && b && a->name && b->name && strcmp(a->name, b->name) == 0 &&
a->flags == b->flags && a->size == b->size )
{
if (a->data == NULL && b->data == NULL)
return TRUE;
else if (a->data && b->data && memcmp(a->data, b->data, a->size) == 0)
return TRUE;
}
return FALSE;
}
gulong
parasite_flags (const Parasite *p)
{
if (p == NULL)
return 0;
return p->flags;
}
gboolean
parasite_is_persistent (const Parasite *p)
{
if (p == NULL)
return FALSE;
return (p->flags & PARASITE_PERSISTENT);
}
gboolean
parasite_is_undoable (const Parasite *p)
{
if (p == NULL)
return FALSE;
return (p->flags & PARASITE_UNDOABLE);
}
gboolean
parasite_has_flag (const Parasite *p,
gulong flag)
{
if (p == NULL)
return FALSE;
return (p->flags & flag);
}
const gchar *
parasite_name (const Parasite *p)
{
if (p)
return p->name;
return NULL;
}
void *
parasite_data (const Parasite *p)
{
if (p)
return p->data;
return NULL;
}
glong
parasite_data_size (const Parasite *p)
{
if (p)
return p->size;
return 0;
}