/* input_file.c - Deal with Input Files -
Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000, 2001,
- 2002, 2003, 2005
+ 2002, 2003, 2005, 2006, 2007, 2009, 2012
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,
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"
-static int input_file_get (char *, int);
-
/* This variable is non-zero if the file currently being read should be
preprocessed by app. It is zero if the file can be read straight in. */
int preprocess = 0;
}
/* Return BUFFER_SIZE. */
-unsigned int
+size_t
input_file_buffer_size (void)
{
return (BUFFER_SIZE);
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);
if (f_in == NULL)
{
- bfd_set_error (bfd_error_system_call);
- as_perror (_("Can't open %s for reading"), file_name);
+ as_bad (_("can't open %s for reading: %s"),
+ file_name, xstrerror (errno));
return;
}
if (ferror (f_in))
{
- bfd_set_error (bfd_error_system_call);
- 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. */
}
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);
/* This function is passed to do_scrub_chars. */
-static int
-input_file_get (char *buf, int buflen)
+static size_t
+input_file_get (char *buf, size_t buflen)
{
- int size;
+ size_t size;
+
+ if (feof (f_in))
+ return 0;
size = fread (buf, sizeof (char), buflen, f_in);
- if (size < 0)
- {
- bfd_set_error (bfd_error_system_call);
- as_perror (_("Can't read from %s"), file_name);
- size = 0;
- }
+ if (ferror (f_in))
+ as_bad (_("can't read from %s: %s"), file_name, xstrerror (errno));
return size;
}
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;
+ size_t size;
if (f_in == (FILE *) 0)
return 0;
if (preprocess)
size = do_scrub_chars (input_file_get, where, BUFFER_SIZE);
else
- size = fread (where, sizeof (char), BUFFER_SIZE, f_in);
- if (size < 0)
- {
- bfd_set_error (bfd_error_system_call);
- as_perror (_("Can't read from %s"), file_name);
- size = 0;
- }
+ size = input_file_get (where, BUFFER_SIZE);
+
if (size)
return_value = where + size;
else
{
if (fclose (f_in))
- {
- bfd_set_error (bfd_error_system_call);
- 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;
}