binutils/testsuite/

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

diff --git a/gas/input-file.c b/gas/input-file.c
index 8fb04f7bc93a061a788490b4dd7a586f22a827dc..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,
-   2003, 2005
+   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,
@@ -17,17 +17,14 @@
 
    You should have received a copy of the GNU General Public License
    along with GAS; see the file COPYING.  If not, write to the Free
-   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-   02111-1307, USA.  */
+   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
 
 /* Confines all details of reading source bytes to this module.
    All O/S specific crocks should live here.
    What we lose in "efficiency" we gain in modularity.
    Note we don't need to #include the "as.h" file. No common coupling!  */
 
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
 #include "as.h"
 #include "input-file.h"
 #include "safe-ctype.h"
@@ -80,12 +77,6 @@ input_file_buffer_size (void)
   return (BUFFER_SIZE);
 }
 
-int
-input_file_is_open (void)
-{
-  return f_in != (FILE *) 0;
-}
-
 /* Push the state of our input, returning a pointer to saved info that
    can be restored with input_file_pop ().  */
 
@@ -133,7 +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);
@@ -149,10 +140,8 @@ input_file_open (char *filename, /* "" means use stdin. Must not be 0.  */
 
   if (f_in == NULL)
     {
-#ifdef BFD_ASSEMBLER
-      bfd_set_error (bfd_error_system_call);
-#endif
-      as_perror (_("Can't open %s for reading"), file_name);
+      as_bad (_("can't open %s for reading: %s"),
+             file_name, xstrerror (errno));
       return;
     }
 
@@ -160,24 +149,31 @@ input_file_open (char *filename, /* "" means use stdin. Must not be 0.  */
 
   if (ferror (f_in))
     {
-#ifdef BFD_ASSEMBLER
-      bfd_set_error (bfd_error_system_call);
-#endif
-      as_perror (_("Can't open %s for reading"), file_name);
+      as_bad (_("can't read from %s: %s"),
+             file_name, xstrerror (errno));
 
       fclose (f_in);
       f_in = NULL;
       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.  */
       c = getc (f_in);
       if (c == 'N')
        {
-         fgets (buf, 80, f_in);
-         if (!strncmp (buf, "O_APP", 5) && ISSPACE (buf[5]))
+         if (fgets (buf, sizeof (buf), f_in)
+             && !strncmp (buf, "O_APP", 5) && ISSPACE (buf[5]))
            preprocess = 0;
          if (!strchr (buf, '\n'))
            ungetc ('#', f_in); /* It was longer.  */
@@ -186,8 +182,8 @@ input_file_open (char *filename, /* "" means use stdin. Must not be 0.  */
        }
       else if (c == 'A')
        {
-         fgets (buf, 80, f_in);
-         if (!strncmp (buf, "PP", 2) && ISSPACE (buf[2]))
+         if (fgets (buf, sizeof (buf), f_in)
+             && !strncmp (buf, "PP", 2) && ISSPACE (buf[2]))
            preprocess = 1;
          if (!strchr (buf, '\n'))
            ungetc ('#', f_in);
@@ -222,13 +218,13 @@ 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)
     {
-#ifdef BFD_ASSEMBLER
-      bfd_set_error (bfd_error_system_call);
-#endif
-      as_perror (_("Can't read from %s"), file_name);
+      as_bad (_("can't read from %s: %s"), file_name, xstrerror (errno));
       size = 0;
     }
   return size;
@@ -240,7 +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;
@@ -251,13 +247,16 @@ 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)
     {
-#ifdef BFD_ASSEMBLER
-      bfd_set_error (bfd_error_system_call);
-#endif
-      as_perror (_("Can't read from %s"), file_name);
+      as_bad (_("can't read from %s: %s"), file_name, xstrerror (errno));
       size = 0;
     }
   if (size)
@@ -265,12 +264,8 @@ input_file_give_next_buffer (char *where /* Where to place 1st character of new
   else
     {
       if (fclose (f_in))
-       {
-#ifdef BFD_ASSEMBLER
-         bfd_set_error (bfd_error_system_call);
-#endif
-         as_perror (_("Can't close %s"), file_name);
-       }
+       as_warn (_("can't close %s: %s"), file_name, xstrerror (errno));
+
       f_in = (FILE *) 0;
       return_value = 0;
     }