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Allow #if defined SYM as well as #if defined(SYM). Fix an abort

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caused by files that have #endif and no newline on the last line
(reported by joe@). Also fix a benign uninitialized variable bug.
Update and tidy the copyright.
This commit is contained in:
Tony Finch 2008-02-29 12:57:14 +00:00
parent 05f41f56cf
commit 25ce8d30ab
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=176658
1 changed files with 31 additions and 18 deletions
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49
usr.bin/unifdef/unifdef.c
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@ -1,13 +1,5 @@
/*
* Copyright (c) 2002 - 2005 Tony Finch <dot@dotat.at>. All rights reserved.
*
* This code is derived from software contributed to Berkeley by Dave Yost.
* It was rewritten to support ANSI C by Tony Finch. The original version of
* unifdef carried the following copyright notice. None of its code remains
* in this version (though some of the names remain).
*
* Copyright (c) 1985, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 2002 - 2008 Tony Finch <dot@dotat.at>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -31,6 +23,14 @@
* SUCH DAMAGE.
*/
/*
* This code is derived from software contributed to Berkeley by Dave Yost.
* It was rewritten to support ANSI C by Tony Finch. The original version
* of unifdef carried the 4-clause BSD copyright licence. None of its code
* remains in this version (though some of the names remain) so it now
* carries a more liberal licence.
*/
#include <sys/cdefs.h>
#ifndef lint
@ -42,7 +42,7 @@ static const char copyright[] =
#ifdef __IDSTRING
__IDSTRING(Berkeley, "@(#)unifdef.c 8.1 (Berkeley) 6/6/93");
__IDSTRING(NetBSD, "$NetBSD: unifdef.c,v 1.8 2000/07/03 02:51:36 matt Exp $");
__IDSTRING(dotat, "$dotat: things/unifdef.c,v 1.171 2005/03/08 12:38:48 fanf2 Exp $");
__IDSTRING(dotat, "$dotat: things/unifdef.c,v 1.176 2008/02/29 12:44:25 fanf2 Exp $");
#endif
#endif /* not lint */
#ifdef __FBSDID
@ -586,9 +586,18 @@ getline(void)
if (incomment)
linestate = LS_DIRTY;
}
/* skipcomment should have changed the state */
if (linestate == LS_HASH)
abort(); /* bug */
/* skipcomment normally changes the state, except
if the last line of the file lacks a newline */
if (linestate == LS_HASH) {
size_t len = cp - tline;
if (fgets(tline + len, MAXLINE - len, input) != NULL)
abort(); /* bug */
/* append the missing newline */
tline[len+0] = '\n';
tline[len+1] = '\0';
cp++;
linestate = LS_START;
}
}
if (linestate == LS_DIRTY) {
while (*cp != '\0')
@ -664,6 +673,7 @@ eval_unary(const struct ops *ops, int *valp, const char **cpp)
const char *cp;
char *ep;
int sym;
bool defparen;
cp = skipcomment(*cpp);
if (*cp == '!') {
@ -687,16 +697,19 @@ eval_unary(const struct ops *ops, int *valp, const char **cpp)
} else if (strncmp(cp, "defined", 7) == 0 && endsym(cp[7])) {
cp = skipcomment(cp+7);
debug("eval%d defined", ops - eval_ops);
if (*cp++ != '(')
return (LT_IF);
cp = skipcomment(cp);
if (*cp == '(') {
cp = skipcomment(cp+1);
defparen = true;
} else {
defparen = false;
}
sym = findsym(cp);
if (sym < 0)
return (LT_IF);
*valp = (value[sym] != NULL);
cp = skipsym(cp);
cp = skipcomment(cp);
if (*cp++ != ')')
if (defparen && *cp++ != ')')
return (LT_IF);
keepthis = false;
} else if (!endsym(*cp)) {
@ -765,7 +778,7 @@ static Linetype
ifeval(const char **cpp)
{
int ret;
int val;
int val = 0;
debug("eval %s", *cpp);
keepthis = killconsts ? false : true;