static void
setting_store (XSettingsSetting *setting,
XSettingsBuffer *buffer)
{
size_t string_len;
size_t length;
*(buffer->pos++) = setting->type;
*(buffer->pos++) = 0;
string_len = strlen (setting->name);
*(CARD16 *)(buffer->pos) = string_len;
buffer->pos += 2;
length = XSETTINGS_PAD (string_len, 4);
memcpy (buffer->pos, setting->name, string_len);
length -= string_len;
buffer->pos += string_len;
while (length > 0)
{
*(buffer->pos++) = 0;
length--;
}
*(CARD32 *)(buffer->pos) = setting->last_change_serial;
buffer->pos += 4;
switch (setting->type)
{
case XSETTINGS_TYPE_INT:
*(CARD32 *)(buffer->pos) = setting->data.v_int;
buffer->pos += 4;
break;
case XSETTINGS_TYPE_STRING:
string_len = strlen (setting->data.v_string);
*(CARD32 *)(buffer->pos) = string_len;
buffer->pos += 4;
length = XSETTINGS_PAD (string_len, 4);
memcpy (buffer->pos, setting->data.v_string, string_len);
length -= string_len;
buffer->pos += string_len;
while (length > 0)
{
*(buffer->pos++) = 0;
length--;
}
break;
case XSETTINGS_TYPE_COLOR:
*(CARD16 *)(buffer->pos) = setting->data.v_color.red;
*(CARD16 *)(buffer->pos + 2) = setting->data.v_color.green;
*(CARD16 *)(buffer->pos + 4) = setting->data.v_color.blue;
*(CARD16 *)(buffer->pos + 6) = setting->data.v_color.alpha;
buffer->pos += 8;
break;
}
}
static size_t
setting_length (XSettingsSetting *setting)
{
size_t length = 8; /* type + pad + name-len + last-change-serial */
length += XSETTINGS_PAD (strlen (setting->name), 4);
switch (setting->type)
{
case XSETTINGS_TYPE_INT:
length += 4;
break;
case XSETTINGS_TYPE_STRING:
length += 4 + XSETTINGS_PAD (strlen (setting->data.v_string), 4);
break;
case XSETTINGS_TYPE_COLOR:
length += 8;
break;
}
return length;
}
static gboolean
fetch_string (XSettingsBuffer *buffer,
guint length,
char **result)
{
guint pad_len;
pad_len = XSETTINGS_PAD (length, 4);
if (pad_len < length) /* guard against overflow */
{
g_warning ("Invalid XSETTINGS property (overflow in string length)");
return FALSE;
}
return_if_fail_bytes (buffer, pad_len);
*result = g_strndup ((char *) buffer->pos, length);
buffer->pos += pad_len;
return TRUE;
}
static void
xfce_xsettings_helper_setting_append (const gchar *name,
XfceXSetting *setting,
XfceXSettingsNotify *notify)
{
gsize buf_len, new_len;
gsize name_len, name_len_pad;
gsize value_len, value_len_pad;
const gchar *str = NULL;
guchar *needle;
guchar type = 0;
gint num;
name_len = strlen (name) - 1 /* -1 for the xfconf slash */;
name_len_pad = XSETTINGS_PAD (name_len, 4);
buf_len = 8 + name_len_pad;
value_len_pad = value_len = 0;
/* get the total size of this setting */
switch (G_VALUE_TYPE (setting->value))
{
case G_TYPE_INT:
case G_TYPE_BOOLEAN:
type = XSettingsTypeInteger;
buf_len += 4;
break;
case G_TYPE_STRING:
type = XSettingsTypeString;
buf_len += 4;
str = g_value_get_string (setting->value);
if (str != NULL)
{
value_len = strlen (str);
value_len_pad = XSETTINGS_PAD (value_len, 4);
buf_len += value_len_pad;
}
break;
case G_TYPE_INT64 /* TODO */:
type = XSettingsTypeColor;
buf_len += 8;
break;
default:
g_assert_not_reached ();
break;
}
/* additional length for this setting */
new_len = notify->buf_len + buf_len;
/* resize the buffer to fit this setting */
notify->buf = g_renew (guchar, notify->buf, new_len);
if (G_UNLIKELY (notify->buf == NULL))
return;
needle = notify->buf + notify->buf_len;
notify->buf_len = new_len;
/* setting record:
*
* 1 SETTING_TYPE type
* 1 unused
* 2 n name-len
* n STRING8 name
* P unused, p=pad(n)
* 4 CARD32 last-change-serial
*/
/* setting type */
*needle++ = type;
/* unused */
*needle++ = 0;
/* name length */
*(CARD16 *)needle = name_len;
needle += 2;
/* name */
memcpy (needle, name + 1 /* +1 for the xfconf slash */, name_len);
needle += name_len;
/* zero the padding */
for (; name_len_pad > name_len; name_len_pad--)
*needle++ = 0;
/* setting's last change serial */
*(CARD32 *)needle = setting->last_change_serial;
needle += 4;
/* set setting value */
switch (type)
{
case XSettingsTypeString:
/* body for XSettingsTypeString:
*
* 4 n value-len
* n STRING8 value
* P unused, p=pad(n)
*/
if (G_LIKELY (value_len > 0 && str != NULL))
{
/* value length */
*(CARD32 *)needle = value_len;
needle += 4;
/* value */
memcpy (needle, str, value_len);
needle += value_len;
/* zero the padding */
for (; value_len_pad > value_len; value_len_pad--)
*needle++ = 0;
}
else
{
/* value length */
*(CARD32 *)needle = 0;
needle += 4;
}
break;
case XSettingsTypeInteger:
/* Body for XSettingsTypeInteger:
*
* 4 INT32 value
*/
if (G_VALUE_TYPE (setting->value) == G_TYPE_INT)
{
num = g_value_get_int (setting->value);
/* special case handling for DPI */
if (strcmp (name, "/Xft/DPI") == 0)
{
/* remember the offset for screen dependend dpi
* or clamp the value and set 1/1024ths of an inch
* for Xft */
if (num < 1)
notify->dpi_offset = needle - notify->buf;
else
num = CLAMP (num, DPI_LOW_REASONABLE, DPI_HIGH_REASONABLE) * 1024;
}
}
else
{
num = g_value_get_boolean (setting->value);
}
*(INT32 *)needle = num;
needle += 4;
break;
/* TODO */
case XSettingsTypeColor:
/* body for XSettingsTypeColor:
*
* 2 CARD16 red
* 2 CARD16 blue
* 2 CARD16 green
* 2 CARD16 alpha
*/
*(CARD16 *)needle = 0;
*(CARD16 *)(needle + 2) = 0;
*(CARD16 *)(needle + 4) = 0;
*(CARD16 *)(needle + 6) = 0;
needle += 8;
break;
default:
g_assert_not_reached ();
break;
}
notify->n_settings++;
}
