configuration changes to remove obsolete autoconf macros, and resultant changes to some source files

include/chartypes.h

@@ -23,22 +23,18 @@
 
 #include <ctype.h>
 
-/* Jim Meyering writes:
+#ifndef UCHAR_MAX
+#  define UCHAR_MAX 255
+#endif
+#ifndef CHAR_MAX
+#  define CHAR_MAX 127
+#endif
 
-   "... Some ctype macros are valid only for character codes that
-   isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
-   using /bin/cc or gcc but without giving an ansi option).  So, all
-   ctype uses should be through macros like ISPRINT...  If
-   STDC_HEADERS is defined, then autoconf has verified that the ctype
-   macros don't need to be guarded with references to isascii. ...
-   Defining IN_CTYPE_DOMAIN to 1 should let any compiler worth its salt
-   eliminate the && through constant folding."
-   Solaris defines some of these symbols so we must undefine them first.  */
-
-#if STDC_HEADERS || (!defined (isascii) && !HAVE_ISASCII)
+/* use this as a proxy for C89 */
+#if defined (HAVE_STDLIB_H) && defined (HAVE_STRING_H)
 #  define IN_CTYPE_DOMAIN(c) 1
 #else
-#  define IN_CTYPE_DOMAIN(c) isascii(c)
+#  define IN_CTYPE_DOMAIN(c) ((c) >= 0 && (c) <= CHAR_MAX)
 #endif
 
 #if !defined (isspace) && !defined (HAVE_ISSPACE)

include/posixtime.h

@@ -25,16 +25,10 @@
 /* Some systems require this, mostly for the definition of `struct timezone'.
    For example, Dynix/ptx has that definition in <time.h> rather than
       sys/time.h */
-#if defined (TIME_WITH_SYS_TIME)
+#if defined (HAVE_SYS_TIME_H)
 #  include <sys/time.h>
-#  include <time.h>
-#else
-#  if defined (HAVE_SYS_TIME_H)
-#    include <sys/time.h>
-#  else
-#    include <time.h>
-#  endif
 #endif
+#include <time.h>
 
 #if !defined (HAVE_SYSCONF) || !defined (_SC_CLK_TCK)
 #  if !defined (CLK_TCK)

include/typemax.h

@@ -79,6 +79,10 @@
 #  define UINT_MAX	((unsigned int) ~(unsigned int)0)
 #endif
 
+#ifndef UCHAR_MAX
+#  define UCHAR_MAX	255
+#endif
+
 /* workaround for gcc bug in versions < 2.7 */
 #if defined (HAVE_LONG_LONG) && __GNUC__ == 2 && __GNUC_MINOR__ < 7
 static const unsigned long long int maxquad = ULLONG_MAX;