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caps: Fail when fractions are followed by random text

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Previous code treated "1/1yourmom" the same as "1/1" and "1wimsmom" the
same as "1". Now the code is stricter and will fail to convert a
fraction when followed by garbage text.
This commit is contained in:
Benjamin Otte 2010-03-08 23:04:26 +01:00
parent b74d73980b
commit ec10b764b9
1 changed files with 9 additions and 7 deletions
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16
gst/gstvalue.c
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@ -3685,6 +3685,7 @@ static gboolean
gst_value_deserialize_fraction (GValue * dest, const gchar * s)
{
gint num, den;
int num_chars;
if (G_UNLIKELY (s == NULL))
return FALSE;
@ -3692,19 +3693,20 @@ gst_value_deserialize_fraction (GValue * dest, const gchar * s)
if (G_UNLIKELY (dest == NULL || !GST_VALUE_HOLDS_FRACTION (dest)))
return FALSE;
if (sscanf (s, "%d/%d", &num, &den) == 2) {
if (sscanf (s, "%d/%d%n", &num, &den, &num_chars) >= 2) {
if (s[num_chars] != 0)
return FALSE;
gst_value_set_fraction (dest, num, den);
return TRUE;
}
if (g_ascii_strcasecmp (s, "1/max") == 0) {
} else if (g_ascii_strcasecmp (s, "1/max") == 0) {
gst_value_set_fraction (dest, 1, G_MAXINT);
return TRUE;
}
if (sscanf (s, "%d", &num) == 1) {
} else if (sscanf (s, "%d%n", &num, &num_chars) >= 1) {
if (s[num_chars] != 0)
return FALSE;
gst_value_set_fraction (dest, num, 1);
return TRUE;
}
if (g_ascii_strcasecmp (s, "min") == 0) {
} else if (g_ascii_strcasecmp (s, "min") == 0) {
gst_value_set_fraction (dest, -G_MAXINT, 1);
return TRUE;
} else if (g_ascii_strcasecmp (s, "max") == 0) {