newlib-2.4.0: wide character strings

git-svn-id: svn://kolibrios.org@6557 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/newlib/libc/string/wcsdup.c

@@ -0,0 +1,62 @@
+/*
+FUNCTION
+	<<wcsdup>>---wide character string duplicate
+	
+INDEX
+	wcsdup
+INDEX
+	_wcsdup_r
+
+ANSI_SYNOPSIS
+	#include <wchar.h>
+	wchar_t *wcsdup(const wchar_t *<[str]>);
+
+	#include <wchar.h>
+	wchar_t *_wcsdup_r(struct _reent *<[ptr]>, const wchar_t *<[str]>);
+
+TRAD_SYNOPSIS
+	#include <wchar.h>
+	wchar_t *wcsdup(<[ptr]>, <[str]>)
+	struct _reent *<[ptr]>;
+	wchar_t *<[str]>;
+
+DESCRIPTION
+	<<wcsdup>> allocates a new wide character string using <<malloc>>,
+	and copies the content of the argument <[str]> into the newly
+	allocated string, thus making a copy of <[str]>.
+
+RETURNS 
+	<<wcsdup>> returns a pointer to the copy of <[str]> if enough
+	memory for the copy was available.  Otherwise it returns NULL
+	and errno is set to ENOMEM.
+
+PORTABILITY
+POSIX-1.2008
+
+QUICKREF
+	wcsdup 
+*/
+
+#include <reent.h>
+#include <stdlib.h>
+#include <wchar.h>
+
+wchar_t *
+_wcsdup_r (struct _reent *p, const wchar_t *str)
+{
+  size_t len = wcslen (str) + 1;
+  wchar_t *copy = _malloc_r (p, len * sizeof (wchar_t));
+  if (copy)
+    wmemcpy (copy, str, len);
+  return copy;
+}
+
+#ifndef _REENT_ONLY
+
+wchar_t *
+wcsdup (const wchar_t *str)
+{
+  return _wcsdup_r (_REENT, str);
+}
+
+#endif /* !_REENT_ONLY */