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Fix alignment problem in deserialization, (#65785, reported by Hidetoshi

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Fri Nov 30 15:55:34 2001  Owen Taylor  <otaylor@redhat.com>
	* gdk-pixdata.c (gdk_pixdata_deserialize): Fix
	alignment problem in deserialization, (#65785,
	reported by Hidetoshi Tajima)
This commit is contained in:
Owen Taylor 2001-11-30 21:01:01 +00:00 committed by Owen Taylor
parent 24aef23aab
commit 2de8e8bf5e
2 changed files with 20 additions and 15 deletions
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6
gdk-pixbuf/ChangeLog
View File

@ -1,3 +1,9 @@
Fri Nov 30 15:55:34 2001 Owen Taylor <otaylor@redhat.com>
* gdk-pixdata.c (gdk_pixdata_deserialize): Fix
alignment problem in deserialization, (#65785,
reported by Hidetoshi Tajima)
2001-11-28 Manish Singh <yosh@gimp.org>
* gdk-pixbuf/io-bmp.c (gdk_pixbuf__bmp_image_load_increment): Fill

29
gdk-pixbuf/gdk-pixdata.c
View File

@ -157,6 +157,13 @@ gdk_pixdata_serialize (const GdkPixdata *pixdata,
return FALSE; \
}
static inline const guint8 *
get_uint32 (const guint8 *stream, guint *result)
{
*result = (stream[0] << 24) + (stream[1] << 16) + (stream[2] << 8) + stream[3];
return stream + 4;
}
/**
* gdk_pixdata_deserialize:
* @pixdata: a #GdkPixdata structure to be filled in.
@ -181,7 +188,6 @@ gdk_pixdata_deserialize (GdkPixdata *pixdata,
const guint8 *stream,
GError **error)
{
guint32 *istream;
guint color_type, sample_width, encoding;
g_return_val_if_fail (pixdata != NULL, FALSE);
@ -191,21 +197,14 @@ gdk_pixdata_deserialize (GdkPixdata *pixdata,
/* deserialize header */
istream = (guint32*) stream;
/*
* the deserialization of GdkPixdata will fail (at least on win32 with msvc 5.0)
* with 'g_ntohl(*istream++)' because the guint32 istream pointer is only
* incremented by 1 byte, if it is done within the g_ntohl() macro.
* Probably working around just another compiler bug ... --HB
*/
pixdata->magic = g_ntohl (*istream); istream++;
pixdata->length = g_ntohl (*istream); istream++;
stream = get_uint32 (stream, &pixdata->magic);
stream = get_uint32 (stream, &pixdata->length);
if (pixdata->magic != GDK_PIXBUF_MAGIC_NUMBER || pixdata->length < GDK_PIXDATA_HEADER_LENGTH)
return_header_corrupt (error);
pixdata->pixdata_type = g_ntohl (*istream); istream++;
pixdata->rowstride = g_ntohl (*istream); istream++;
pixdata->width = g_ntohl (*istream); istream++;
pixdata->height = g_ntohl (*istream); istream++;
stream = get_uint32 (stream, &pixdata->pixdata_type);
stream = get_uint32 (stream, &pixdata->rowstride);
stream = get_uint32 (stream, &pixdata->width);
stream = get_uint32 (stream, &pixdata->height);
if (pixdata->width < 1 || pixdata->height < 1 ||
pixdata->rowstride < pixdata->width)
return_header_corrupt (error);
@ -222,7 +221,7 @@ gdk_pixdata_deserialize (GdkPixdata *pixdata,
/* deserialize pixel data */
if (stream_length < pixdata->length - GDK_PIXDATA_HEADER_LENGTH)
return_pixel_corrupt (error);
pixdata->pixel_data = (guint8*) istream;
pixdata->pixel_data = (guint8 *)stream;
return TRUE;
}