auxiliary routines update.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@1898 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/ruby.h b/ruby.h
index d1f48959f..31a147fcc 100644
--- a/ruby.h
+++ b/ruby.h
@@ -35,6 +35,7 @@ extern "C" {
 #include <stdio.h>
 
 /* need to include <ctype.h> to use these macros */
+#ifndef ISPRINT
 #define ISASCII(c) isascii((unsigned char)(c))
 #undef ISPRINT
 #define ISPRINT(c) (ISASCII(c) && isprint((unsigned char)(c)))
@@ -45,6 +46,7 @@ extern "C" {
 #define ISALPHA(c) (ISASCII(c) && isalpha((unsigned char)(c)))
 #define ISDIGIT(c) (ISASCII(c) && isdigit((unsigned char)(c)))
 #define ISXDIGIT(c) (ISASCII(c) && isxdigit((unsigned char)(c)))
+#endif
 
 #if !defined(__STDC__) && !defined(_MSC_VER)
 # define volatile