t9300: factor out portable "head -c" replacement

diff --git a/graph.c b/graph.c
index c25a09a8fdaf3e90bf7e029c78127146418ab023..1350bdde3be4346e8bc2038c57e4883d0ab12b25 100644 (file)
--- a/graph.c
+++ b/graph.c
@@ -234,12 +234,10 @@ struct git_graph *graph_init(struct rev_info *opt)
         * We'll automatically grow columns later if we need more room.
         */
        graph->column_capacity = 30;
-       graph->columns = xmalloc(sizeof(struct column) *
-                                graph->column_capacity);
-       graph->new_columns = xmalloc(sizeof(struct column) *
-                                    graph->column_capacity);
-       graph->mapping = xmalloc(sizeof(int) * 2 * graph->column_capacity);
-       graph->new_mapping = xmalloc(sizeof(int) * 2 * graph->column_capacity);
+       ALLOC_ARRAY(graph->columns, graph->column_capacity);
+       ALLOC_ARRAY(graph->new_columns, graph->column_capacity);
+       ALLOC_ARRAY(graph->mapping, 2 * graph->column_capacity);
+       ALLOC_ARRAY(graph->new_mapping, 2 * graph->column_capacity);
 
        /*
         * The diff output prefix callback, with this we can make