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garray: Fix g_ptr_array_insert() with indices > G_MAXINT

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While an index greater than `G_MAXINT` can’t be passed to
`g_ptr_array_insert()`, `-1` can be — and if that’s done with an array
which has more than `G_MAXINT` elements in it, the new element will be
inserted part-way through the array rather than being appended.

Spotted by building with `-Wsign-conversion`.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>

Helps: #3405
This commit is contained in:
Philip Withnall 2024-06-28 15:25:30 +01:00
parent b32e1b63ee
commit 7b435dfa7c
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GPG Key ID: DCDF5885B1F3ED73
1 changed files with 8 additions and 8 deletions
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16
glib/garray.c
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@ -2338,23 +2338,23 @@ g_ptr_array_insert (GPtrArray *array,
gpointer data)
{
GRealPtrArray *rarray = (GRealPtrArray *)array;
guint real_index;
g_return_if_fail (rarray);
g_return_if_fail (index_ >= -1);
g_return_if_fail (index_ <= (gint)rarray->len);
g_return_if_fail (index_ < 0 || (guint) index_ <= rarray->len);
g_ptr_array_maybe_expand (rarray, 1u + rarray->null_terminated);
if (index_ < 0)
index_ = rarray->len;
real_index = (index_ >= 0) ? (guint) index_ : rarray->len;
if ((guint) index_ < rarray->len)
memmove (&(rarray->pdata[index_ + 1]),
&(rarray->pdata[index_]),
(rarray->len - index_) * sizeof (gpointer));
if (real_index < rarray->len)
memmove (&(rarray->pdata[real_index + 1]),
&(rarray->pdata[real_index]),
(rarray->len - real_index) * sizeof (gpointer));
rarray->len++;
rarray->pdata[index_] = data;
rarray->pdata[real_index] = data;
ptr_array_maybe_null_terminate (rarray);
}