File unifdef-codecleanup.diff of Package unifdef

--- unifdef.c
+++ unifdef.c
@@ -35,13 +35,13 @@
  */
 
 #ifndef lint
-static char copyright[] =
+static char __attribute__((used)) copyright[] =
 "@(#) Copyright (c) 1985, 1993\n\
 	The Regents of the University of California.  All rights reserved.\n";
 #endif /* not lint */
 
 #ifndef lint
-static char sccsid[] = "@(#)unifdef.c	8.1 (Berkeley) 6/6/93";
+static char __attribute__((used) )sccsid[] = "@(#)unifdef.c	8.1 (Berkeley) 6/6/93";
 #endif /* not lint */
 
 /*
@@ -59,6 +59,8 @@
 
 #include <stdio.h>
 #include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
 
 #define BSS
 FILE *input;
@@ -90,19 +92,21 @@
 #define QUOTE_NONE   0
 #define QUOTE_SINGLE 1
 #define QUOTE_DOUBLE 2
+
 char inquote BSS;           /* inside single or double quotes */
 
 int exitstat BSS;
-char *skipcomment ();
-char *skipquote ();
+char *skipcomment (char *);
+char *skipquote (char *, int);
+int findsym (char *);
+void prname (void);
+void pfile (void);
 
-main (argc, argv)
-int argc;
-char **argv;
+int main (int argc, char **argv)
 {
     char **curarg;
-    register char *cp;
-    register char *cp1;
+    char *cp;
+    char *cp1;
     char ignorethis;
 
     progname = argv[0][0] ? argv[0] : "unifdef";
@@ -120,7 +124,7 @@
 	       )
 	    && cp1[1] != '\0'
 	   ) {
-	    register int symind;
+	     int symind;
 
 	    if ((symind = findsym (&cp1[1])) < 0) {
 		if (nsyms >= MAXSYMS) {
@@ -190,7 +194,7 @@
 #define LT_ELSE        5   /* #else */
 #define LT_ENDIF       6   /* #endif */
 #define LT_LEOF        7   /* end of file */
-extern Linetype checkline ();
+Linetype checkline(int *);
 
 typedef int Reject_level;
 Reject_level reject BSS;    /* 0 or 1: pass thru; 1 or 2: ignore comments */
@@ -224,22 +228,26 @@
 #define IN_IF   1
 #define IN_ELSE 2
 
-pfile ()
+int doif (int, int, Reject_level, int);
+
+void pfile (void)
 {
     reject = REJ_NO;
     (void) doif (-1, IN_NONE, reject, 0);
     return;
 }
 
+void flushline (Bool);
+int error (int, int, int);
+
 int
-doif (thissym, inif, prevreject, depth)
-register int thissym;   /* index of the symbol who was last ifdef'ed */
-int inif;               /* YES or NO we are inside an ifdef */
-Reject_level prevreject;/* previous value of reject */
-int depth;              /* depth of ifdef's */
+doif ( int thissym,		/* index of the symbol who was last ifdef'ed */
+       int inif,		/* YES or NO we are inside an ifdef */
+       Reject_level prevreject,	/* previous value of reject */
+       int depth)		/* depth of ifdef's */
 {
-    register Linetype lineval;
-    register Reject_level thisreject;
+    Linetype lineval;
+    Reject_level thisreject;
     int doret;          /* tmp return value of doif */
     int cursym;         /* index of the symbol returned by checkline */
     int stline;         /* line number when called this time */
@@ -339,12 +347,13 @@
 #define MAXLINE 256
 char tline[MAXLINE] BSS;
 
+int getlin (char *, int, FILE *, int);
+
 Linetype
-checkline (cursym)
-int *cursym;    /* if LT_TRUE or LT_FALSE returned, set this to sym index */
+checkline (int *cursym)    /* if LT_TRUE or LT_FALSE returned, set this to sym index */
 {
-    register char *cp;
-    register char *symp;
+     char *cp;
+     char *symp;
     char *scp;
     Linetype retval;
 #   define KWSIZE 8
@@ -424,8 +433,7 @@
  *  position that is not whitespace.
  */
 char *
-skipcomment (cp)
-register char *cp;
+skipcomment (char *cp)
 {
     if (incomment)
 	goto inside;
@@ -466,16 +474,15 @@
  *  position that is not whitespace.
  */
 char *
-skipquote (cp, type)
-register char *cp;
-register int type;
+skipquote (char *cp, int type)
 {
-    register char qchar;
+     char qchar;
 
     qchar = type == QUOTE_SINGLE ? '\'' : '"';
 
     if (inquote == type)
 	goto inside;
+
     for (;; cp++) {
 	if (*cp != qchar)
 	    return cp;
@@ -501,13 +508,12 @@
  *            else return -1.
  */
 int
-findsym (str)
-char *str;
+findsym (char *str)
 {
-    register char *cp;
-    register char *symp;
-    register int symind;
-    register char chr;
+     char *cp;
+     char *symp;
+     int symind;
+     char chr;
 
     for (symind = 0; symind < nsyms; ++symind) {
 	if (insym[symind] == SYM_INACTIVE) {
@@ -529,15 +535,11 @@
  *            and (if compiled in) treats form-feed as an end-of-line
  */
 int
-getlin (line, maxline, inp, expandtabs)
-register char *line;
-int maxline;
-FILE *inp;
-int expandtabs;
+getlin ( char *line, int maxline, FILE *inp, int expandtabs)
 {
     int tmp;
-    register int num;
-    register int chr;
+     int num;
+     int chr;
 #ifdef  FFSPECIAL
     static char havechar = NO;  /* have leftover char from last time */
     static char svchar BSS;
@@ -600,32 +602,31 @@
     return num;
 }
 
-flushline (keep)
-Bool keep;
+void flushline (Bool keep)
 {
     if ((keep && reject != REJ_YES) ^ complement) {
-	register char *line = tline;
-	register FILE *out = stdout;
-	register char chr;
+	 char *line = tline;
+	 FILE *out = stdout;
+	 char chr;
 
-	while (chr = *line++)
+	while ((chr = *line++))
 	    putc (chr, out);
     } else if (lnblank)
+
 	putc ('\n', stdout);
     return;
 }
 
-prname ()
+void prname (void)
 {
     fprintf (stderr, "%s: ", progname);
     return;
 }
 
 int
-error (err, line, depth)
-int err;        /* type of error & index into error string array */
-int line;       /* line number */
-int depth;      /* how many ifdefs we are inside */
+error (int err,		/* type of error & index into error string array */
+       int line,	/* line number */
+       int depth)	/* how many ifdefs we are inside */
 {
     if (err == END_ERR)
 	return err;