/* input_file.c - Deal with Input Files -
- Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000, 2001,
- 2002, 2003, 2005, 2006, 2007
- Free Software Foundation, Inc.
+ Copyright (C) 1987-2020 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
#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;
/* We use static data: the data area is not sharable. */
static FILE *f_in;
-static char *file_name;
+static const char *file_name;
/* Struct for saving the state of this module for file includes. */
struct saved_file
{
FILE * f_in;
- char * file_name;
+ const char * file_name;
int preprocess;
char * app_save;
};
}
/* Return BUFFER_SIZE. */
-unsigned int
+size_t
input_file_buffer_size (void)
{
return (BUFFER_SIZE);
char *
input_file_push (void)
{
- register struct saved_file *saved;
+ struct saved_file *saved;
- saved = (struct saved_file *) xmalloc (sizeof *saved);
+ saved = XNEW (struct saved_file);
saved->f_in = f_in;
saved->file_name = file_name;
void
input_file_pop (char *arg)
{
- register struct saved_file *saved = (struct saved_file *) arg;
+ struct saved_file *saved = (struct saved_file *) arg;
input_file_end (); /* Close out old file. */
free (arg);
}
\f
+/* Open the specified file, "" means stdin. Filename must not be null. */
+
void
-input_file_open (char *filename, /* "" means use stdin. Must not be 0. */
+input_file_open (const char *filename,
int pre)
{
int c;
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. */
/* 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)
- {
- as_bad (_("can't read from %s: %s"), file_name, xstrerror (errno));
- 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)
- {
- as_bad (_("can't read from %s: %s"), file_name, xstrerror (errno));
- size = 0;
- }
+ size = input_file_get (where, BUFFER_SIZE);
+
if (size)
return_value = where + size;
else