1 files changed, 28 insertions, 0 deletions
diff --git a/src/sort-uniq-keyfuncs.c b/src/sort-uniq-keyfuncs.c
index d661aefe3..31bf03e19 100644
--- a/src/sort-uniq-keyfuncs.c
+++ b/src/sort-uniq-keyfuncs.c
@@ -174,6 +174,34 @@ sort_die (char const *message, char const *file)
        quotef (file ? file : _("standard output")));
 }
 
+/* Initialize BUF.  Reserve LINE_BYTES bytes for each line; LINE_BYTES
+   must be at least sizeof (struct line).  Allocate ALLOC bytes
+   initially.  */
+
+static void
+initbuf (struct buffer *buf, size_t line_bytes, size_t alloc)
+{
+  /* Ensure that the line array is properly aligned.  If the desired
+     size cannot be allocated, repeatedly halve it until allocation
+     succeeds.  The smaller allocation may hurt overall performance,
+     but that's better than failing.  */
+  while (true)
+    {
+      alloc += sizeof (struct line) - alloc % sizeof (struct line);
+      buf->buf = malloc (alloc);
+      if (buf->buf)
+        break;
+      alloc /= 2;
+      if (alloc <= line_bytes + 1)
+        xalloc_die ();
+    }
+
+  buf->line_bytes = line_bytes;
+  buf->alloc = alloc;
+  buf->used = buf->left = buf->nlines = 0;
+  buf->eof = false;
+}
+
 /* Return one past the limit of the line array.  */
 
 static inline struct line *