Reviewed by: ache and wollman (long ago)

Fix numerous ANSI conformance bugs and other nits.

ctype.h:
o There were no prototypes behind the macros (conformance bug).
o isascii() didn't have enough parentheses (plain bug).
o tolower() and toupper were always static inline (conformance
  bug?  You could undef them and take their address, but this
  gave different addresses in different modules.  You couldn't
  undef them and declare them (correctly) again).  <stdio.h>'s
  treatment of putc() shows one way to handle this problem,
  but it only works because the putc() macro is allowed to
  reevaluate its args.  I used a hack controlled by
  _EXTERNALIZE_CTYPE_INLINES_ to get <ctype.h> to generate the
  code (the previous hack involving _ANSI_LIBRARY_ goes away).
  This has the advantage that the core of the functions is only
  written down once and the disadvantage that another layer of
  functions is required.  The extra layer goes away if inline
  functions are used, leaving only the problem of understanding
  why there are functions named toupper(), __toupper and
  ___toupper() as well as a macro named toupper.
o Nothing seems to define _USE_CTYPE_LIBRARY_.  Eliminate it
o Let the user set _USE_CTYPE_INLINE_ and _DONT_USE_CTYPE_INLINE_
  for full control over inlining.
o The args for the inline functions didn't have enough
  underscores (conformance bug).
o The formatting and ordering was inconsistent (style bug).
o TODO: fix conformance bugs brought by including <runetype.h>.

1 files changed, 84 insertions, 52 deletions

diff --git a/include/_ctype.h b/include/_ctype.h
index 079c4b9..157134e 100644
--- a/include/_ctype.h
+++ b/include/_ctype.h
@@ -41,9 +41,13 @@
  *	@(#)ctype.h	8.4 (Berkeley) 1/21/94
  */
 
-#ifndef	_CTYPE_H_
-#define _CTYPE_H_
+#ifndef _CTYPE_H_
+#define	_CTYPE_H_
 
+/*
+ * XXX <runetype.h> brings massive namespace pollution (rune_t and struct
+ * member names).
+ */
 #include <runetype.h>
 
 #define	_A	0x00000100L		/* Alpha */
@@ -61,29 +65,55 @@
 #define	_T	0x00100000L		/* Special */
 #define	_Q	0x00200000L		/* Phonogram */
 
-#define isalnum(c)      __istype((c), (_A|_D))
-#define isalpha(c)      __istype((c),     _A)
-#define iscntrl(c)      __istype((c),     _C)
-#define isdigit(c)      __isctype((c),    _D)	/* ANSI -- locale independent */
-#define isgraph(c)      __istype((c),     _G)
-#define islower(c)      __istype((c),     _L)
-#define isprint(c)      __istype((c),     _R)
-#define ispunct(c)      __istype((c),     _P)
-#define isspace(c)      __istype((c),     _S)
-#define isupper(c)      __istype((c),     _U)
-#define isxdigit(c)     __isctype((c),    _X)	/* ANSI -- locale independent */
+__BEGIN_DECLS
+int	isalnum __P((int));
+int	isalpha __P((int));
+int	iscntrl __P((int));
+int	isdigit __P((int));
+int	isgraph __P((int));
+int	islower __P((int));
+int	isprint __P((int));
+int	ispunct __P((int));
+int	isspace __P((int));
+int	isupper __P((int));
+int	isxdigit __P((int));
+int	tolower __P((int));
+int	toupper __P((int));
+
+#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
+int	isascii __P((int));
+int	isblank __P((int));
+int	toascii __P((int));
+#endif
+__END_DECLS
+
+#define	isalnum(c)      __istype((c), (_A|_D))
+#define	isalpha(c)      __istype((c),     _A)
+#define	iscntrl(c)      __istype((c),     _C)
+#define	isdigit(c)      __isctype((c),    _D)	/* ANSI -- locale independent */
+#define	isgraph(c)      __istype((c),     _G)
+#define	islower(c)      __istype((c),     _L)
+#define	isprint(c)      __istype((c),     _R)
+#define	ispunct(c)      __istype((c),     _P)
+#define	isspace(c)      __istype((c),     _S)
+#define	isupper(c)      __istype((c),     _U)
+#define	isxdigit(c)     __isctype((c),    _X)	/* ANSI -- locale independent */
+#define	tolower(c)	__tolower(c)
+#define	toupper(c)	__toupper(c)
 
 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
-#define	isascii(c)	((c & ~0x7F) == 0)
-#define toascii(c)	((c) & 0x7F)
+#define	isascii(c)	(((c) & ~0x7F) == 0)
+#define	isblank(c)	__istype((c), _B)
+#define	toascii(c)	((c) & 0x7F)
+
+/* XXX the following macros are not backed up by functions. */
 #define	digittoint(c)	__istype((c), 0xFF)
+#define	ishexnumber(c)	__istype((c), _X)
 #define	isideogram(c)	__istype((c), _I)
+#define	isnumber(c)	__istype((c), _D)
 #define	isphonogram(c)	__istype((c), _T)
+#define	isrune(c)	__istype((c), 0xFFFFFF00L)
 #define	isspecial(c)	__istype((c), _Q)
-#define isblank(c)	__istype((c), _B)
-#define	isrune(c)	__istype((c),  0xFFFFFF00L)
-#define	isnumber(c)	__istype((c), _D)
-#define	ishexnumber(c)	__istype((c), _X)
 #endif
 
 /* See comments in <machine/ansi.h> about _BSD_RUNE_T_. */
@@ -94,62 +124,64 @@ _BSD_RUNE_T_	___toupper __P((_BSD_RUNE_T_));
 __END_DECLS
 
 /*
- * If your compiler supports prototypes and inline functions,
- * #define _USE_CTYPE_INLINE_.  Otherwise, use the C library
- * functions.
+ * _EXTERNALIZE_CTYPE_INLINES_ is defined in locale/nomacros.c to tell us
+ * to generate code for extern versions of all our inline functions.
  */
-#if !defined(_USE_CTYPE_CLIBRARY_) && defined(__GNUC__) || defined(__cplusplus)
-#define	_USE_CTYPE_INLINE_	1
+#ifdef _EXTERNALIZE_CTYPE_INLINES_
+#define	_USE_CTYPE_INLINE_
+#define	static
+#define	__inline
 #endif
 
-#if defined(_USE_CTYPE_INLINE_)
+/*
+ * Use inline functions if we are allowed to and the compiler supports them.
+ */
+#if !defined(_DONT_USE_CTYPE_INLINE_) && \
+    (defined(_USE_CTYPE_INLINE_) || defined(__GNUC__) || defined(__cplusplus))
 static __inline int
-__istype(_BSD_RUNE_T_ __c, unsigned long __f)
+__istype(_BSD_RUNE_T_ _c, unsigned long _f)
 {
-	if (__c < 0)
-		__c = (unsigned char) __c;
-	return((((__c & _CRMASK) ? ___runetype(__c) :
-	    _CurrentRuneLocale->runetype[__c]) & __f) ? 1 : 0);
+	if (_c < 0)
+		_c = (unsigned char) _c;
+	return((((_c & _CRMASK) ? ___runetype(_c) :
+	    _CurrentRuneLocale->runetype[_c]) & _f) ? 1 : 0);
 }
 
 static __inline int
-__isctype(_BSD_RUNE_T_ __c, unsigned long __f)
+__isctype(_BSD_RUNE_T_ _c, unsigned long _f)
 {
-	if (__c < 0)
-		__c = (unsigned char) __c;
-	return((((__c & _CRMASK) ? 0 :
-	    _DefaultRuneLocale.runetype[__c]) & __f) ? 1 : 0);
+	if (_c < 0)
+		_c = (unsigned char) _c;
+	return((((_c & _CRMASK) ? 0 :
+	    _DefaultRuneLocale.runetype[_c]) & _f) ? 1 : 0);
 }
 
-/* _ANSI_LIBRARY is defined by lib/libc/gen/isctype.c. */
-#if !defined(_ANSI_LIBRARY)
 static __inline _BSD_RUNE_T_
-toupper(_BSD_RUNE_T_ __c)
+__toupper(_BSD_RUNE_T_ _c)
 {
-	if (__c < 0)
-		__c = (unsigned char) __c;
-	return((__c & _CRMASK) ?
-	    ___toupper(__c) : _CurrentRuneLocale->mapupper[__c]);
+	if (_c < 0)
+		_c = (unsigned char) _c;
+	return((_c & _CRMASK) ?
+	    ___toupper(_c) : _CurrentRuneLocale->mapupper[_c]);
 }
 
 static __inline _BSD_RUNE_T_
-tolower(_BSD_RUNE_T_ __c)
+__tolower(_BSD_RUNE_T_ _c)
 {
-	if (__c < 0)
-		__c = (unsigned char) __c;
-	return((__c & _CRMASK) ?
-	    ___tolower(__c) : _CurrentRuneLocale->maplower[__c]);
+	if (_c < 0)
+		_c = (unsigned char) _c;
+	return((_c & _CRMASK) ?
+	    ___tolower(_c) : _CurrentRuneLocale->maplower[_c]);
 }
-#endif /* !_ANSI_LIBRARY */
 
-#else /* !_USE_CTYPE_INLINE_ */
+#else /* not using inlines */
 
 __BEGIN_DECLS
 int		__istype __P((_BSD_RUNE_T_, unsigned long));
 int		__isctype __P((_BSD_RUNE_T_, unsigned long));
-_BSD_RUNE_T_	toupper __P((_BSD_RUNE_T_));
-_BSD_RUNE_T_	tolower __P((_BSD_RUNE_T_));
+_BSD_RUNE_T_	__toupper __P((_BSD_RUNE_T_));
+_BSD_RUNE_T_	__tolower __P((_BSD_RUNE_T_));
 __END_DECLS
-#endif /* _USE_CTYPE_INLINE_ */
+#endif /* using inlines */
 
 #endif /* !_CTYPE_H_ */