sim: m32c: switch from custom fgets to getline

No need to implement this ourselves when POSIX has a nice API.

sim/m32c/ChangeLog

@@ -1,3 +1,10 @@
+2021-05-07  Mike Frysinger  <vapier@gentoo.org>
+
+	* Makefile.in: Delete safe-fgets.
+	* opc2c.c: Delete safe-fgets.h include.
+	(main): Replace safe_fgets with getline.
+	* safe-fgets.c, safe-fgets.h: Removed.
+
 2021-05-05  Mike Frysinger  <vapier@gentoo.org>
 
 	* gdb-if.c: Include libiberty.h.

sim/m32c/Makefile.in

@@ -56,14 +56,11 @@ m32c.c : m32c.opc opc2c
 	$(OPC2C) -l m32c.out $(srcdir)/m32c.opc > m32c.c.tmp
 	mv m32c.c.tmp m32c.c
 
-opc2c : opc2c.o safe-fgets.o
+opc2c : opc2c.o
 	$(LINK_FOR_BUILD) $^
 
 encodings:
 	grep '/\* [01]' $(srcdir)/r8c.opc | sort
 
-opc2c.o : opc2c.c safe-fgets.h
+opc2c.o : opc2c.c
 	$(COMPILE_FOR_BUILD) -c $(srcdir)/opc2c.c
-
-safe-fgets.o : safe-fgets.c safe-fgets.h
-	$(COMPILE_FOR_BUILD) -c $(srcdir)/safe-fgets.c

sim/m32c/opc2c.c

@@ -24,8 +24,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <ctype.h>
 #include <stdlib.h>
 
-#include "safe-fgets.h"
-
 static int errors = 0;
 
 #define MAX_BYTES 10
@@ -504,10 +502,11 @@ log_indirect (Indirect * ind, int byte)
 int
 main (int argc, char **argv)
 {
-  char *line;
+  char *linebuf;
   FILE *in;
   int lineno = 0;
   int i;
+  size_t len;
 
   if (argc > 2 && strcmp (argv[1], "-l") == 0)
     {
@@ -536,8 +535,12 @@ main (int argc, char **argv)
   opcodes = (opcode **) malloc (sizeof (opcode *));
   op = &prefix_text;
   op->lineno = 1;
-  while ((line = safe_fgets (in)) != 0)
+  linebuf = NULL;
+  len = 0;
+  while (getline (&linebuf, &len, in) >= 0)
     {
+      char *line = linebuf;
+
       lineno++;
       if (strncmp (line, "  /** ", 6) == 0
 	  && (isdigit (line[6]) || memcmp (line + 6, "VARY", 4) == 0))
@@ -629,6 +632,7 @@ main (int argc, char **argv)
 	  op->lines[op->nlines - 1] = strdup (line);
 	}
     }
+  free (linebuf);
 
   {
     int i, j;

sim/m32c/safe-fgets.c

@@ -1,69 +0,0 @@
-/* safe-fgets.c --- like fgets, but allocates its own static buffer.
-
-Copyright (C) 2005-2021 Free Software Foundation, Inc.
-Contributed by Red Hat, Inc.
-
-This file is part of the GNU simulators.
-
-This program 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 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "safe-fgets.h"
-
-static char *line_buf = 0;
-static int line_buf_size = 0;
-
-#define LBUFINCR 100
-
-char *
-safe_fgets (FILE * f)
-{
-  char *line_ptr;
-
-  if (line_buf == 0)
-    {
-      line_buf = (char *) malloc (LBUFINCR);
-      line_buf_size = LBUFINCR;
-    }
-
-  /* points to last byte */
-  line_ptr = line_buf + line_buf_size - 1;
-
-  /* so we can see if fgets put a 0 there */
-  *line_ptr = 1;
-  if (fgets (line_buf, line_buf_size, f) == 0)
-    return 0;
-
-  /* we filled the buffer? */
-  while (line_ptr[0] == 0 && line_ptr[-1] != '\n')
-    {
-      /* Make the buffer bigger and read more of the line */
-      line_buf_size += LBUFINCR;
-      line_buf = (char *) realloc (line_buf, line_buf_size);
-
-      /* points to last byte again */
-      line_ptr = line_buf + line_buf_size - 1;
-      /* so we can see if fgets put a 0 there */
-      *line_ptr = 1;
-
-      if (fgets (line_buf + line_buf_size - LBUFINCR - 1, LBUFINCR + 1, f) ==
-	  0)
-	return 0;
-    }
-
-  return line_buf;
-}

sim/m32c/safe-fgets.h

@@ -1,27 +0,0 @@
-/* safe-fgets.h --- interface to safe version of fgets.
-
-Copyright (C) 2005-2021 Free Software Foundation, Inc.
-Contributed by Red Hat, Inc.
-
-This file is part of the GNU simulators.
-
-This program 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 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-
-#ifndef _safe_gets_h_
-#define _safe_gets_h_
-
-char *safe_fgets (FILE * f);
-
-#endif