PR gas/12390

[deliverable/binutils-gdb.git] / gas / input-file.c

diff --git a/gas/input-file.c b/gas/input-file.c
index 0907bad37c86075bbea1bc4883925e3868a05ece..709c972c9af029d027595bf0b6f944e5a04ec6d0 100644 (file)
--- a/gas/input-file.c
+++ b/gas/input-file.c
@@ -1,13 +1,13 @@
 /* input_file.c - Deal with Input Files -
    Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000, 2001,
-   2002, 2003, 2005, 2006
+   2002, 2003, 2005, 2006, 2007, 2009
    Free Software Foundation, Inc.
 
    This file is part of GAS, the GNU Assembler.
 
    GAS is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
+   the Free Software Foundation; either version 3, or (at your option)
    any later version.
 
    GAS is distributed in the hope that it will be useful,
@@ -124,7 +124,7 @@ input_file_open (char *filename, /* "" means use stdin. Must not be 0.  */
 
   preprocess = pre;
 
-  assert (filename != 0);      /* Filename may not be NULL.  */
+  gas_assert (filename != 0);  /* Filename may not be NULL.  */
   if (filename[0])
     {
       f_in = fopen (filename, FOPEN_RT);
@@ -157,6 +157,15 @@ input_file_open (char *filename, /* "" means use stdin. Must not be 0.  */
       return;
     }
 
+  /* Check for an empty input file.  */
+  if (feof (f_in))
+    {
+      fclose (f_in);
+      f_in = NULL;
+      return;
+    }
+  gas_assert (c != EOF);
+
   if (c == '#')
     {
       /* Begins with comment, may not want to preprocess.  */
@@ -209,6 +218,9 @@ input_file_get (char *buf, int buflen)
 {
   int size;
 
+  if (feof (f_in))
+    return 0;
+  
   size = fread (buf, sizeof (char), buflen, f_in);
   if (size < 0)
     {
@@ -224,7 +236,7 @@ char *
 input_file_give_next_buffer (char *where /* Where to place 1st character of new buffer.  */)
 {
   char *return_value;          /* -> Last char of what we read, + 1.  */
-  register int size;
+  int size;
 
   if (f_in == (FILE *) 0)
     return 0;
@@ -235,7 +247,13 @@ input_file_give_next_buffer (char *where /* Where to place 1st character of new
   if (preprocess)
     size = do_scrub_chars (input_file_get, where, BUFFER_SIZE);
   else
-    size = fread (where, sizeof (char), BUFFER_SIZE, f_in);
+    {
+      if (feof (f_in))
+       size = 0;
+      else
+       size = fread (where, sizeof (char), BUFFER_SIZE, f_in);
+    }
+
   if (size < 0)
     {
       as_bad (_("can't read from %s: %s"), file_name, xstrerror (errno));