1 files changed, 101 insertions, 0 deletions
diff --git a/libgfortran/intrinsics/string_intrinsics.c b/libgfortran/intrinsics/string_intrinsics.c
new file mode 100644
index 0000000000..5f847e9990
--- /dev/null
+++ b/libgfortran/intrinsics/string_intrinsics.c
@@ -0,0 +1,101 @@
+/* String intrinsics helper functions.
+   Copyright (C) 2008-2017 Free Software Foundation, Inc.
+
+This file is part of the GNU Fortran runtime library (libgfortran).
+
+Libgfortran is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public
+License as published by the Free Software Foundation; either
+version 3 of the License, or (at your option) any later version.
+
+Libgfortran 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 General Public License for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+
+/* Unlike what the name of this file suggests, we don't actually
+   implement the Fortran intrinsics here.  At least, not with the
+   names they have in the standard.  The functions here provide all
+   the support we need for the standard string intrinsics, and the
+   compiler translates the actual intrinsics calls to calls to
+   functions in this file.  */
+
+#include "libgfortran.h"
+
+#include <string.h>
+#include <assert.h>
+
+
+/* Helper function to set parts of wide strings to a constant (usually
+   spaces).  */
+
+static gfc_char4_t *
+memset_char4 (gfc_char4_t *b, gfc_char4_t c, size_t len)
+{
+  size_t i;
+
+  for (i = 0; i < len; i++)
+    b[i] = c;
+
+  return b;
+}
+
+/* Compare wide character types, which are handled internally as
+   unsigned 4-byte integers.  */
+int
+memcmp_char4 (const void *a, const void *b, size_t len)
+{
+  const GFC_UINTEGER_4 *pa = a;
+  const GFC_UINTEGER_4 *pb = b;
+  while (len-- > 0)
+    {
+      if (*pa != *pb)
+	return *pa < *pb ? -1 : 1;
+      pa ++;
+      pb ++;
+    }
+  return 0;
+}
+
+
+/* All other functions are defined using a few generic macros in
+   string_intrinsics_inc.c, so we avoid code duplication between the
+   various character type kinds.  */
+
+#undef  CHARTYPE
+#define CHARTYPE char
+#undef  UCHARTYPE
+#define UCHARTYPE unsigned char
+#undef  SUFFIX
+#define SUFFIX(x) x
+#undef  MEMSET
+#define MEMSET memset
+#undef  MEMCMP
+#define MEMCMP memcmp
+
+#include "string_intrinsics_inc.c"
+
+
+#undef  CHARTYPE
+#define CHARTYPE gfc_char4_t
+#undef  UCHARTYPE
+#define UCHARTYPE gfc_char4_t
+#undef  SUFFIX
+#define SUFFIX(x) x ## _char4
+#undef  MEMSET
+#define MEMSET memset_char4
+#undef  MEMCMP
+#define MEMCMP memcmp_char4
+
+#include "string_intrinsics_inc.c"
+