[glib: 1/5] garray: Fix -Wsign-compare warnings

[Philip Withnall <pwithnall src gnome org>]

commit 03bad7894782c1f3192cc8930027d7dda3bfa0ca
Author: Philip Withnall <withnall endlessm com>
Date:   Tue Jul 10 14:15:42 2018 +0200

    garray: Fix -Wsign-compare warnings
    
    Signed-off-by: Philip Withnall <withnall endlessm com>

 glib/garray.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)
---
diff --git a/glib/garray.c b/glib/garray.c
index 8f908e443..5b71c887a 100644
--- a/glib/garray.c
+++ b/glib/garray.c
@@ -139,9 +139,9 @@ struct _GRealArray
     g_array_elt_zero ((array), (array)->len, 1);                        \
 }G_STMT_END
 
-static guint g_nearest_pow        (gint        num) G_GNUC_CONST;
+static guint g_nearest_pow        (guint       num) G_GNUC_CONST;
 static void  g_array_maybe_expand (GRealArray *array,
-                                   gint        len);
+                                   guint       len);
 
 /**
  * g_array_new:
@@ -789,7 +789,7 @@ g_array_sort_with_data (GArray           *farray,
  * such power does not fit in a guint
  */
 static guint
-g_nearest_pow (gint num)
+g_nearest_pow (guint num)
 {
   guint n = 1;
 
@@ -801,7 +801,7 @@ g_nearest_pow (gint num)
 
 static void
 g_array_maybe_expand (GRealArray *array,
-                      gint        len)
+                      guint       len)
 {
   guint want_alloc = g_array_elt_len (array, array->len + len + 
                                       array->zero_terminated);
@@ -1189,27 +1189,31 @@ g_ptr_array_set_size  (GPtrArray *array,
                        gint       length)
 {
   GRealPtrArray *rarray = (GRealPtrArray *)array;
+  guint length_unsigned;
 
   g_return_if_fail (rarray);
   g_return_if_fail (rarray->len == 0 || (rarray->len != 0 && rarray->pdata != NULL));
+  g_return_if_fail (length >= 0);
 
-  if (length > rarray->len)
+  length_unsigned = (guint) length;
+
+  if (length_unsigned > rarray->len)
     {
-      int i;
-      g_ptr_array_maybe_expand (rarray, (length - rarray->len));
+      guint i;
+      g_ptr_array_maybe_expand (rarray, (length_unsigned - rarray->len));
       /* This is not 
        *     memset (array->pdata + array->len, 0,
-       *            sizeof (gpointer) * (length - array->len));
+       *            sizeof (gpointer) * (length_unsigned - array->len));
        * to make it really portable. Remember (void*)NULL needn't be
        * bitwise zero. It of course is silly not to use memset (..,0,..).
        */
-      for (i = rarray->len; i < length; i++)
+      for (i = rarray->len; i < length_unsigned; i++)
         rarray->pdata[i] = NULL;
     }
-  else if (length < rarray->len)
-    g_ptr_array_remove_range (array, length, rarray->len - length);
+  else if (length_unsigned < rarray->len)
+    g_ptr_array_remove_range (array, length_unsigned, rarray->len - length_unsigned);
 
-  rarray->len = length;
+  rarray->len = length_unsigned;
 }
 
 static gpointer