Initial import of the CDE 2.1.30 sources from the Open Group.

cde/lib/DtSvc/include/codelibs/nl_hack.h

@@ -0,0 +1,62 @@
+/*
+ * $XConsortium: nl_hack.h /main/5 1996/11/15 18:12:32 drk $
+ *
+ * (c) Copyright 1993, 1994 Hewlett-Packard Company
+ * (c) Copyright 1993, 1994 International Business Machines Corp.
+ * (c) Copyright 1993, 1994 Sun Microsystems, Inc.
+ * (c) Copyright 1993, 1994 Novell, Inc.
+ */
+
+#ifndef __NL_HACK_H_
+#define __NL_HACK_H_
+
+#include	<ctype.h>
+
+#ifdef NO_NLS16
+
+# define ADVANCE(p)     (++(p))
+# define CHARAT(p)      (*(unsigned char *)(p))
+# define CHARADV(p)     (*(unsigned char *)(p)++)
+# define WCHAR(c, p)    (*(unsigned char *)(p) = c)
+# define WCHARADV(c, p) (*(unsigned char *)(p)++ = c)
+
+#else
+
+# include <locale.h>
+# include <stdlib.h>
+
+/* These two globals are needed for the following macros to work.
+ * The definitions are neither "extern" nor "static".  This keeps both
+ * C and C++ from complaining about unused variables, keeps the linker
+ * from complaining about multiply-defined symbols, and creates only a
+ * single instance of each var per program (rather than one per *.o).
+ * This is also why both variables are uninitialized arrays.
+ *
+ * These macros imitate the original HP NLS16 equivalents so that rest
+ * of the Codelibs code does not need to be modified.  The original
+ * definitions are below within the "#ifdef NLS16" section.
+ *
+ * The original HP NLS16 assumes 2 byte multi-byte characters. It is
+ * generalized for all multi-byte characters.
+ */
+
+/* wchar_t __nlh_char[1]; */
+
+# define __NLH_WIDTH(p)	(mblen(p, MB_CUR_MAX) > 1 ? mblen(p, MB_CUR_MAX) : 1)
+# define __NLH_CHAR(p)	\
+	(mbtowc(__nlh_char, p, MB_CUR_MAX) < 0 ? *p : __nlh_char[0])
+
+# define ADVANCE(p)	((p) += __NLH_WIDTH(p))
+
+# define CHARAT(p)	(__NLH_CHAR(p))
+
+# define CHARADV(p)	(__NLH_CHAR(p),	\
+			 (p) += __NLH_WIDTH(p), __nlh_char[0])
+
+# define WCHAR(c, p)	(wctomb(p, (wchar_t)c), c)
+
+# define WCHARADV(c, p)	(WCHAR(c, p), ADVANCE(p))
+
+#endif
+
+#endif /* __NL_HACK_H_ */