/* input_file.c - Deal with Input Files -
- Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000, 2001,
- 2002, 2003, 2005
- Free Software Foundation, Inc.
+ Copyright (C) 1987-2019 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;
/* 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;
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 == '#')
{
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;
}
projects / deliverable / binutils-gdb.git / blobdiff