needed by various files in lib

1 files changed, 87 insertions, 0 deletions

diff --git a/include/c-ctype.h b/include/c-ctype.h
new file mode 100644
index 0000000..ac251bd
--- /dev/null
+++ b/include/c-ctype.h
@@ -0,0 +1,87 @@
+/* c-ctype.h: ASCII-safe versions of the <ctype.h> macros.
+
+Copyright (C) 1992, 2000 Free Software Foundation, Inc.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifndef KPATHSEA_C_CTYPE_H
+#define KPATHSEA_C_CTYPE_H
+
+#include <ctype.h>
+
+/* Be sure we have `isascii'.  */
+#ifdef WIN32
+#include <oldnames.h>
+#else
+#ifndef isascii
+#define isascii(c) 1
+#endif
+#endif
+
+#define ISALNUM(c) (isascii (c) && isalnum(c))
+#define ISALPHA(c) (isascii (c) && isalpha(c))
+#define ISASCII isascii
+#define ISCNTRL(c) (isascii (c) && iscntrl(c))
+#define ISDIGIT(c) (isascii (c) && isdigit (c))
+#define ISGRAPH(c) (isascii (c) && isgraph(c))
+#define ISLOWER(c) (isascii (c) && islower(c))
+#define ISPRINT(c) (isascii (c) && isprint(c))
+#define ISPUNCT(c) (isascii (c) && ispunct(c))
+#define ISSPACE(c) (isascii (c) && isspace(c))
+#define ISUPPER(c) (isascii (c) && isupper(c))
+#define ISXDIGIT(c) (isascii (c) && isxdigit(c))
+#define TOASCII toascii
+#define TOLOWER(c) (ISUPPER (c) ? tolower (c) : (c))
+#define TOUPPER(c) (ISLOWER (c) ? toupper (c) : (c))
+
+/* This isn't part of the usual <ctype.h>, but it's useful sometimes.  */
+#ifndef isblank
+#define isblank(c) ((c) == ' ' || (c) == '\t')
+#endif
+
+#define ISBLANK(c) (isascii (c) && isblank (c))
+
+
+/* Here's why this mess is necessary:
+
+From: meyering@cs.utexas.edu (Jim Meyering)
+Date: Wed, 25 Nov 1992 09:52:33 -0600
+Subject: ss-921123: using isascii with <ctype.h> macros
+
+  Yesterday some cursory regression testing found that GNU od
+  (in an upcoming release of textutils) generated incorrect output
+  when run on an SGI indigo because isprint ('\377') returned true.
+  Of course, '\377' is not a printing character;  the problem lay
+  in using isprint without first making sure its integer argument
+  corresponded to an ascii code.
+
+  MORAL: always guard uses of ctype macros with isascii if it's available.
+  An obvious alternative is to avoid <ctype.h> and define and use your
+  own versions of the ctype macros.
+
+  A pretty clean approach to using <ctype.h> and isascii was
+  suggested by David MacKenzie:
+
+  #ifndef isascii
+  #define isascii(c) 1
+  #endif
+
+  #define ISDIGIT(c) (isascii (c) && isdigit (c))
+  #define ISPRINT(c) (isascii (c) && isprint (c))
+  ...
+
+  then, use ISDIGIT, etc. instead of isdigit, etc.  */
+  
+#endif /* not KPATHSEA_C_CTYPE_H */