- added implementation of stdc++ for haiku

- this differs slightly from the one that lives in buildtools/gcc as it
  has been "ported" to the newer libio that haiku uses as part of its own
  libroot


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9906 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/cpp/cstring

@@ -0,0 +1,96 @@
+// The -*- C++ -*- null-terminated string header.
+// This file is part of the GNU ANSI C++ Library.
+
+#ifndef __CSTRING__
+#define __CSTRING__
+
+#include <string.h>
+
+#if 0 // Let's not bother with this just yet.
+#include <cstddef>
+
+#ifdef __GNUG__
+#pragma interface "cstring"
+#endif
+
+// The ANSI C prototypes for these functions have a const argument type and
+// non-const return type, so we can't use them.
+
+extern "C++" {
+extern inline const char *
+_G_strchr (const char *s, int c)
+{
+  return strchr (s, c);
+}
+
+extern inline char *
+_G_strchr (char *s, int c)
+{
+  return const_cast<char *> (strchr (s, c));
+}
+
+extern inline const char *
+_G_strpbrk (const char *s1, const char *s2)
+{
+  return strpbrk (s1, s2);
+}
+
+extern inline char *
+_G_strpbrk (char *s1, const char *s2)
+{
+  return const_cast<char *> (strpbrk (s1, s2));
+}
+
+extern inline const char *
+_G_strrchr (const char *s, int c)
+{
+  return strrchr (s, c);
+}
+
+extern inline char *
+_G_strrchr (char *s, int c)
+{
+  return const_cast<char *> (strrchr (s, c));
+}
+
+extern inline const char *
+_G_strstr (const char *s1, const char *s2)
+{
+  return strstr (s1, s2);
+}
+
+extern inline char *
+_G_strstr (char *s1, const char *s2)
+{
+  return const_cast<char *> (strstr (s1, s2));
+}
+
+extern inline const void *
+_G_memchr (const void *s, int c, size_t n)
+{
+  return memchr (s, c, n);
+}
+
+extern inline void *
+_G_memchr (void *s, int c, size_t n)
+{
+  return const_cast<void *> (memchr (s, c, n));
+}
+} // extern "C++"
+
+// Lose any vendor macros for these functions.
+#undef strchr
+#undef strpbrk
+#undef strrchr
+#undef strstr
+#undef memchr
+
+// Ewww, namespace pollution.  Anyone have a better idea?
+#define strchr  _G_strchr
+#define strpbrk _G_strpbrk
+#define strrchr _G_strrchr
+#define strstr  _G_strstr
+#define memchr  _G_memchr
+#endif // 0
+
+#endif // !defined (__CSTRING__)