[Bug 599546] [0.10/1.0] Faster write macros

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=599546
  GStreamer | gstreamer (core) | git

--- Comment #35 from Sebastian Dröge <slomo at circular-chaos.org> 2012-06-11 08:07:12 UTC ---
Causes compiler warnings in gnonlin with clang 3.1:

  CC     libgnl_la-gnl.lo
In file included from gnl.c:25:
In file included from ./gnl.h:24:
In file included from
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gst.h:82:
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gstutils.h:120:11: error: 
      cast from 'const guint8 *' (aka 'const unsigned char *') to
      'const guint16 *' (aka 'const unsigned short *') increases required
      alignment from 1 to 2 [-Werror,-Wcast-align]
  return *(const guint16*)(v);
          ^~~~~~~~~~~~~~~~~~~
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gstutils.h:123:11: error: 
      cast from 'const guint8 *' (aka 'const unsigned char *') to
      'const guint32 *' (aka 'const unsigned int *') increases required
      alignment from 1 to 4 [-Werror,-Wcast-align]
  return *(const guint32*)(v);
          ^~~~~~~~~~~~~~~~~~~
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gstutils.h:126:11: error: 
      cast from 'const guint8 *' (aka 'const unsigned char *') to
      'const guint64 *' (aka 'const unsigned long *') increases required
      alignment from 1 to 8 [-Werror,-Wcast-align]
  return *(const guint64*)(v);
          ^~~~~~~~~~~~~~~~~~~
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gstutils.h:129:30: error: 
      cast from 'const guint8 *' (aka 'const unsigned char *') to
      'const guint16 *' (aka 'const unsigned short *') increases required
      alignment from 1 to 2 [-Werror,-Wcast-align]
  return GUINT16_SWAP_LE_BE(*(const guint16*)(v));
         ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
/usr/include/glib-2.0/glib/gtypes.h:313:67: note: expanded from macro
      'GUINT16_SWAP_LE_BE'
#    define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_CONSTANT (val))
                                                                  ^
/usr/include/glib-2.0/glib/gtypes.h:154:27: note: expanded from macro
      'GUINT16_SWAP_LE_BE_CONSTANT'
    (guint16) ((guint16) (val) >> 8) |  \
                          ^~~
In file included from gnl.c:25:
In file included from ./gnl.h:24:
In file included from
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gst.h:82:
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gstutils.h:129:30: error: 
      cast from 'const guint8 *' (aka 'const unsigned char *') to
      'const guint16 *' (aka 'const unsigned short *') increases required
      alignment from 1 to 2 [-Werror,-Wcast-align]
  return GUINT16_SWAP_LE_BE(*(const guint16*)(v));
         ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
/usr/include/glib-2.0/glib/gtypes.h:313:67: note: expanded from macro
      'GUINT16_SWAP_LE_BE'
#    define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_CONSTANT (val))
                                                                  ^
/usr/include/glib-2.0/glib/gtypes.h:155:27: note: expanded from macro
      'GUINT16_SWAP_LE_BE_CONSTANT'
    (guint16) ((guint16) (val) << 8)))
                          ^~~
In file included from gnl.c:25:
In file included from ./gnl.h:24:
In file included from
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gst.h:82:
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gstutils.h:132:30: error: 
      cast from 'const guint8 *' (aka 'const unsigned char *') to
      'const guint32 *' (aka 'const unsigned int *') increases required
      alignment from 1 to 4 [-Werror,-Wcast-align]
  return GUINT32_SWAP_LE_BE(*(const guint32*)(v));
         ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
/usr/include/glib-2.0/glib/gtypes.h:315:67: note: expanded from macro
      'GUINT32_SWAP_LE_BE'
#      define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_X86_64 (val))
                                                                  ^
/usr/include/glib-2.0/glib/gtypes.h:294:46: note: expanded from macro
      'GUINT32_SWAP_LE_BE_X86_64'
         ({ register guint32 __v, __x = ((guint32) (val));      \
                                                    ^~~
In file included from gnl.c:25:
In file included from ./gnl.h:24:
In file included from
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gst.h:82:
/home/slomo/Projects/gstreamer/head/gstreamer/gst/gstutils.h:135:30: error: 
      cast from 'const guint8 *' (aka 'const unsigned char *') to
      'const guint64 *' (aka 'const unsigned long *') increases required
      alignment from 1 to 8 [-Werror,-Wcast-align]
  return GUINT64_SWAP_LE_BE(*(const guint64*)(v));
         ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
/usr/include/glib-2.0/glib/gtypes.h:318:67: note: expanded from macro
      'GUINT64_SWAP_LE_BE'
#      define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_X86_64 (val))
                                                                  ^
/usr/include/glib-2.0/glib/gtypes.h:304:45: note: expanded from macro
      'GUINT64_SWAP_LE_BE_X86_64'
        ({ register guint64 __v, __x = ((guint64) (val));       \
                                                   ^~~
7 errors generated.

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