* doc.c (get_doc_string): Rework so that

[bpt/emacs.git] / src / doc.c

diff --git a/src/doc.c b/src/doc.c
index eb8ff3c..83e943c 100644 (file)
--- a/src/doc.c
+++ b/src/doc.c
@@ -166,19 +166,19 @@ get_doc_string (Lisp_Object filepos, int unibyte, int definition)
   p = get_doc_string_buffer;
   while (1)
     {
-      ptrdiff_t space_left = (get_doc_string_buffer_size
+      ptrdiff_t space_left = (get_doc_string_buffer_size - 1
                              - (p - get_doc_string_buffer));
       int nread;
 
       /* Allocate or grow the buffer if we need to.  */
-      if (space_left == 0)
+      if (space_left <= 0)
        {
          ptrdiff_t in_buffer = p - get_doc_string_buffer;
          get_doc_string_buffer =
            xpalloc (get_doc_string_buffer, &get_doc_string_buffer_size,
                     16 * 1024, -1, 1);
          p = get_doc_string_buffer + in_buffer;
-         space_left = (get_doc_string_buffer_size
+         space_left = (get_doc_string_buffer_size - 1
                        - (p - get_doc_string_buffer));
        }