Move D demangling routines out of d-lang.c and into d-support.c, which

is intended to house other D language support functions.

gdb/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

    * Makefile.in (SFILES): Add d-support.c.
    (COMMON_OBS): Add d-support.o.
    * d-lang.h (d_parse_symbol): Add comment, now defined in
    d-support.c.
    * d-lang.c (parse_call_convention)
    (parse_attributes, parse_function_types)
    (parse_function_args, parse_type, parse_identifier)
    (call_convention_p, d_parse_symbol): Move functions to ...
    * d-support.c: ... New file.

5 files changed, 637 insertions, 598 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index ec8ce43..8671d4f 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,17 @@
 2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>
 
+	* Makefile.in (SFILES): Add d-support.c.
+	(COMMON_OBS): Add d-support.o.
+	* d-lang.h (d_parse_symbol): Add comment, now defined in
+	d-support.c.
+	* d-lang.c (parse_call_convention)
+	(parse_attributes, parse_function_types)
+	(parse_function_args, parse_type, parse_identifier)
+	(call_convention_p, d_parse_symbol): Move functions to ...
+	* d-support.c: ... New file.
+
+2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>
+
 	* d-lang.h (d_parse_symbol): Add declaration.
 	* d-lang.c (extract_identifiers)
 	(extract_type_info): Remove functions.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 9811cbe..0fbaaa3 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -727,7 +727,7 @@ SFILES = ada-exp.y ada-lang.c ada-typeprint.c ada-valprint.c ada-tasks.c \
 	charset.c cleanups.c cli-out.c coffread.c coff-pe-read.c \
 	complaints.c completer.c continuations.c corefile.c corelow.c \
 	cp-abi.c cp-support.c cp-namespace.c cp-valprint.c \
-	d-lang.c d-valprint.c \
+	d-lang.c d-support.c d-valprint.c \
 	cp-name-parser.y \
 	dbxread.c demangle.c dictionary.c disasm.c doublest.c dummy-frame.c \
 	dwarf2expr.c dwarf2loc.c dwarf2read.c dwarf2-frame.c \
@@ -947,6 +947,7 @@ COMMON_OBS = $(DEPFILES) $(CONFIG_OBS) $(YYOBJ) \
 	inline-frame.o \
 	gnu-v2-abi.o gnu-v3-abi.o cp-abi.o cp-support.o \
 	cp-namespace.o \
+	d-support.o \
 	reggroups.o regset.o \
 	trad-frame.o \
 	tramp-frame.o \
diff --git a/gdb/d-lang.c b/gdb/d-lang.c
index 9c5eead..b724b96 100644
--- a/gdb/d-lang.c
+++ b/gdb/d-lang.c
@@ -26,11 +26,6 @@
 #include "parser-defs.h"
 #include "gdb_obstack.h"
 
-#include "safe-ctype.h"
-
-static const char *parse_function_args (struct obstack *, const char *);
-static const char *parse_type (struct obstack *, const char *);
-
 /* The name of the symbol to use to get the name of the main subprogram.  */
 static const char D_MAIN[] = "D main";
 
@@ -52,598 +47,6 @@ d_main_name (void)
   return NULL;
 }
 
-/* Demangle the calling convention from MANGLE and append it to TEMPBUF.
-   Return the remaining string on success or NULL on failure.  */
-
-static const char *
-parse_call_convention (struct obstack *tempbuf, const char *mangle)
-{
-  if ((mangle == NULL) || (*mangle == '\0'))
-    return mangle;
-
-  switch (*mangle)
-    {
-    case 'F': /* (D) */
-      mangle++;
-      break;
-    case 'U': /* (C) */
-      mangle++;
-      obstack_grow_str (tempbuf, "extern(C) ");
-      break;
-    case 'W': /* (Windows) */
-      mangle++;
-      obstack_grow_str (tempbuf, "extern(Windows) ");
-      break;
-    case 'V': /* (Pascal) */
-      mangle++;
-      obstack_grow_str (tempbuf, "extern(Pascal) ");
-      break;
-    case 'R': /* (C++) */
-      mangle++;
-      obstack_grow_str (tempbuf, "extern(C++) ");
-      break;
-    default:
-      return NULL;
-    }
-
-  return mangle;
-}
-
-/* Demangle the D function attributes from MANGLE and append it to TEMPBUF.
-   Return the remaining string on success or NULL on failure.  */
-
-static const char *
-parse_attributes (struct obstack *tempbuf, const char *mangle)
-{
-  if ((mangle == NULL) || (*mangle == '\0'))
-    return mangle;
-
-  while (*mangle == 'N')
-    {
-      mangle++;
-      switch (*mangle)
-	{
-	case 'a': /* pure */
-	  mangle++;
-	  obstack_grow_str (tempbuf, "pure ");
-	  continue;
-	case 'b': /* nothrow */
-	  mangle++;
-	  obstack_grow_str (tempbuf, "nothrow ");
-	  continue;
-	case 'c': /* ref */
-	  mangle++;
-	  obstack_grow_str (tempbuf, "ref ");
-	  continue;
-	case 'd': /* @property */
-	  mangle++;
-	  obstack_grow_str (tempbuf, "@property ");
-	  continue;
-	case 'e': /* @trusted */
-	  mangle++;
-	  obstack_grow_str (tempbuf, "@trusted ");
-	  continue;
-	case 'f': /* @safe */
-	  mangle++;
-	  obstack_grow_str (tempbuf, "@safe ");
-	  continue;
-	case 'g':
-	case 'h':
-	  /* inout parameter is represented as 'Ng'.
-	     vector parameter is represented as 'Nh'.
-	     If we see this, then we know we're really in the
-	     parameter list.  Rewind and break.  */
-	  mangle--;
-	}
-      break;
-    }
-  return mangle;
-}
-
-/* Demangle the function type from MANGLE and append it to TEMPBUF.
-   Return the remaining string on success or NULL on failure.  */
-
-static const char *
-parse_function_type (struct obstack *tempbuf, const char *mangle)
-{
-  struct obstack obattr, obargs, obtype;
-  char *attr, *args, *type;
-  size_t szattr, szargs, sztype;
-
-  if ((mangle == NULL) || (*mangle == '\0'))
-    return mangle;
-
-  /* The order of the mangled string is:
-     TypeFunction ::
-        CallConvention FuncAttrs Arguments ArgClose Type
-
-     The demangled string is re-ordered as:
-        CallConvention Type Arguments FuncAttrs
-   */
-  obstack_init (&obattr);
-  obstack_init (&obargs);
-  obstack_init (&obtype);
-
-  /* Function call convention.  */
-  mangle = parse_call_convention (tempbuf, mangle);
-
-  /* Function attributes.  */
-  mangle = parse_attributes (&obattr, mangle);
-  szattr = obstack_object_size (&obattr);
-  attr = obstack_finish (&obattr);
-
-  /* Function arguments.  */
-  mangle = parse_function_args (&obargs, mangle);
-  szargs = obstack_object_size (&obargs);
-  args = obstack_finish (&obargs);
-
-  /* Function return type.  */
-  mangle = parse_type (&obtype, mangle);
-  sztype = obstack_object_size (&obtype);
-  type = obstack_finish (&obtype);
-
-  /* Append to buffer in order. */
-  obstack_grow (tempbuf, type, sztype);
-  obstack_grow_str (tempbuf, "(");
-  obstack_grow (tempbuf, args, szargs);
-  obstack_grow_str (tempbuf, ") ");
-  obstack_grow (tempbuf, attr, szattr);
-
-  obstack_free (&obattr, NULL);
-  obstack_free (&obargs, NULL);
-  obstack_free (&obtype, NULL);
-  return mangle;
-}
-
-/* Demangle the argument list from MANGLE and append it to TEMPBUF.
-   Return the remaining string on success or NULL on failure.  */
-
-static const char *
-parse_function_args (struct obstack *tempbuf, const char *mangle)
-{
-  size_t n = 0;
-
-  while ((mangle != NULL) && (*mangle != '\0'))
-    {
-      switch (*mangle)
-	{
-	case 'X': /* (variadic T t...) style.  */
-	  mangle++;
-	  obstack_grow_str (tempbuf, "...");
-	  return mangle;
-	case 'Y': /* (variadic T t, ...) style.  */
-	  mangle++;
-	  obstack_grow_str (tempbuf, ", ...");
-	  return mangle;
-	case 'Z': /* Normal function.  */
-	  mangle++;
-	  return mangle;
-	}
-
-      if (n++)
-	obstack_grow_str (tempbuf, ", ");
-
-      if (*mangle == 'M') /* scope(T) */
-	{
-	  mangle++;
-	  obstack_grow_str (tempbuf, "scope ");
-	}
-
-      switch (*mangle)
-	{
-	case 'J': /* out(T) */
-	  mangle++;
-	  obstack_grow_str (tempbuf, "out ");
-	  break;
-	case 'K': /* ref(T) */
-	  mangle++;
-	  obstack_grow_str (tempbuf, "ref ");
-	  break;
-	case 'L': /* lazy(T) */
-	  mangle++;
-	  obstack_grow_str (tempbuf, "lazy ");
-	  break;
-	}
-      mangle = parse_type (tempbuf, mangle);
-    }
-  return mangle;
-}
-
-/* Demangle the type from MANGLE and append it to TEMPBUF.
-   Return the remaining string on success or NULL on failure.  */
-
-static const char *
-parse_type (struct obstack *tempbuf, const char *mangle)
-{
-  if ((mangle == NULL) || (*mangle == '\0'))
-    return mangle;
-
-  switch (*mangle)
-    {
-    case 'O': /* shared(T) */
-      mangle++;
-      obstack_grow_str (tempbuf, "shared(");
-      mangle = parse_type (tempbuf, mangle);
-      obstack_grow_str (tempbuf, ")");
-      return mangle;
-    case 'x': /* const(T) */
-      mangle++;
-      obstack_grow_str (tempbuf, "const(");
-      mangle = parse_type (tempbuf, mangle);
-      obstack_grow_str (tempbuf, ")");
-      return mangle;
-    case 'y': /* immutable(T) */
-      mangle++;
-      obstack_grow_str (tempbuf, "immutable(");
-      mangle = parse_type (tempbuf, mangle);
-      obstack_grow_str (tempbuf, ")");
-      return mangle;
-    case 'N':
-      mangle++;
-      if (*mangle == 'g') /* wild(T) */
-	{
-	  mangle++;
-	  obstack_grow_str (tempbuf, "inout(");
-	  mangle = parse_type (tempbuf, mangle);
-	  obstack_grow_str (tempbuf, ")");
-	  return mangle;
-	}
-      else if (*mangle == 'h') /* vector(T) */
-	{
-	  mangle++;
-	  /* The basetype for vectors are always static arrays.  */
-	  if (*mangle != 'G')
-	    return NULL;
-	  obstack_grow_str (tempbuf, "__vector(");
-	  mangle = parse_type (tempbuf, mangle);
-	  obstack_grow_str (tempbuf, ")");
-	  return mangle;
-	}
-      else
-	return NULL;
-    case 'A': /* dynamic array (T[]) */
-      mangle++;
-      mangle = parse_type (tempbuf, mangle);
-      obstack_grow_str (tempbuf, "[]");
-      return mangle;
-    case 'G': /* static array (T[N]) */
-    {
-      const char *numptr;
-      size_t num = 0;
-      mangle++;
-
-      numptr = mangle;
-      while (ISDIGIT (*mangle))
-	{
-	  num++;
-	  mangle++;
-	}
-      mangle = parse_type (tempbuf, mangle);
-      obstack_grow_str (tempbuf, "[");
-      obstack_grow (tempbuf, numptr, num);
-      obstack_grow_str (tempbuf, "]");
-      return mangle;
-    }
-    case 'H': /* associative array (T[T]) */
-    {
-      struct obstack obtype;
-      char *type;
-      size_t sztype;
-      mangle++;
-
-      obstack_init (&obtype);
-      mangle = parse_type (&obtype, mangle);
-      sztype = obstack_object_size (&obtype);
-      type = obstack_finish (&obtype);
-
-      mangle = parse_type (tempbuf, mangle);
-      obstack_grow_str (tempbuf, "[");
-      obstack_grow (tempbuf, type, sztype);
-      obstack_grow_str (tempbuf, "]");
-
-      obstack_free (&obtype, NULL);
-      return mangle;
-    }
-    case 'P': /* pointer (T*) */
-      mangle++;
-      mangle = parse_type (tempbuf, mangle);
-      obstack_grow_str (tempbuf, "*");
-      return mangle;
-    case 'I': /* ident T */
-    case 'C': /* class T */
-    case 'S': /* struct T */
-    case 'E': /* enum T */
-    case 'T': /* typedef T */
-      mangle++;
-      return d_parse_symbol (tempbuf, mangle);
-    case 'D': /* delegate T */
-      mangle++;
-      mangle = parse_function_type (tempbuf, mangle);
-      obstack_grow_str (tempbuf, "delegate");
-      return mangle;
-    case 'B': /* tuple T */
-      /* TODO: Handle this.  */
-      return NULL;
-
-    /* Function types */
-    case 'F': case 'U': case 'W':
-    case 'V': case 'R':
-      mangle = parse_function_type (tempbuf, mangle);
-      obstack_grow_str (tempbuf, "function");
-      return mangle;
-
-    /* Basic types */
-    case 'n':
-      mangle++;
-      obstack_grow_str (tempbuf, "none");
-      return mangle;
-    case 'v':
-      mangle++;
-      obstack_grow_str (tempbuf, "void");
-      return mangle;
-    case 'g':
-      mangle++;
-      obstack_grow_str (tempbuf, "byte");
-      return mangle;
-    case 'h':
-      mangle++;
-      obstack_grow_str (tempbuf, "ubyte");
-      return mangle;
-    case 's':
-      mangle++;
-      obstack_grow_str (tempbuf, "short");
-      return mangle;
-    case 't':
-      mangle++;
-      obstack_grow_str (tempbuf, "ushort");
-      return mangle;
-    case 'i':
-      mangle++;
-      obstack_grow_str (tempbuf, "int");
-      return mangle;
-    case 'k':
-      mangle++;
-      obstack_grow_str (tempbuf, "uint");
-      return mangle;
-    case 'l':
-      mangle++;
-      obstack_grow_str (tempbuf, "long");
-      return mangle;
-    case 'm':
-      mangle++;
-      obstack_grow_str (tempbuf, "ulong");
-      return mangle;
-    case 'f':
-      mangle++;
-      obstack_grow_str (tempbuf, "float");
-      return mangle;
-    case 'd':
-      mangle++;
-      obstack_grow_str (tempbuf, "double");
-      return mangle;
-    case 'e':
-      mangle++;
-      obstack_grow_str (tempbuf, "real");
-      return mangle;
-
-    /* Imaginary and Complex types */
-    case 'o':
-      mangle++;
-      obstack_grow_str (tempbuf, "ifloat");
-      return mangle;
-    case 'p':
-      mangle++;
-      obstack_grow_str (tempbuf, "idouble");
-      return mangle;
-    case 'j':
-      mangle++;
-      obstack_grow_str (tempbuf, "ireal");
-      return mangle;
-    case 'q':
-      mangle++;
-      obstack_grow_str (tempbuf, "cfloat");
-      return mangle;
-    case 'r':
-      mangle++;
-      obstack_grow_str (tempbuf, "cdouble");
-      return mangle;
-    case 'c':
-      mangle++;
-      obstack_grow_str (tempbuf, "creal");
-      return mangle;
-
-    /* Other types */
-    case 'b':
-      mangle++;
-      obstack_grow_str (tempbuf, "bool");
-      return mangle;
-    case 'a':
-      mangle++;
-      obstack_grow_str (tempbuf, "char");
-      return mangle;
-    case 'u':
-      mangle++;
-      obstack_grow_str (tempbuf, "wchar");
-      return mangle;
-    case 'w':
-      mangle++;
-      obstack_grow_str (tempbuf, "dchar");
-      return mangle;
-
-    default: /* unhandled */
-      return NULL;
-    }
-}
-
-/* Extract the identifier from MANGLE and append it to TEMPBUF.
-   Return the remaining string on success or NULL on failure.  */
-
-static const char *
-parse_identifier (struct obstack *tempbuf, const char *mangle)
-{
-  if ((mangle == NULL) || (*mangle == '\0'))
-    return mangle;
-
-  if (ISDIGIT (*mangle))
-    {
-      char *endptr;
-      long i = strtol (mangle, &endptr, 10);
-
-      if (i <= 0 || strlen (endptr) < i)
-	return NULL;
-
-      mangle = endptr;
-
-      /* No support for demangling templates.  */
-      if (i >= 5 && strncmp (mangle, "__T", 3) == 0)
-	return NULL;
-
-      if (strncmp (mangle, "__ctor", i) == 0)
-	{
-	  /* Constructor symbol for a class/struct.  */
-	  obstack_grow_str (tempbuf, "this");
-	  mangle += i;
-	  return mangle;
-	}
-      else if (strncmp (mangle, "__dtor", i) == 0)
-	{
-	  /* Destructor symbol for a class/struct.  */
-	  obstack_grow_str (tempbuf, "~this");
-	  mangle += i;
-	  return mangle;
-	}
-      else if (strncmp (mangle, "__postblit", i) == 0)
-	{
-	  /* Postblit symbol for a struct.  */
-	  obstack_grow_str (tempbuf, "this(this)");
-	  mangle += i;
-	  return mangle;
-	}
-      else if (strncmp (mangle, "__initZ", i+1) == 0)
-	{
-	  /* The static initialiser for a given symbol.  */
-	  obstack_grow_str (tempbuf, "init$");
-	  mangle += i + 1;
-	  return mangle;
-	}
-      else if (strncmp (mangle, "__ClassZ", i+1) == 0)
-	{
-	  /* The classinfo symbol for a given class.  */
-	  obstack_grow_str (tempbuf, "classinfo$");
-	  mangle += i + 1;
-	  return mangle;
-	}
-      else if (strncmp (mangle, "__vtblZ", i+1) == 0)
-	{
-	  /* The vtable symbol for a given class.  */
-	  obstack_grow_str (tempbuf, "vtbl$");
-	  mangle += i + 1;
-	  return mangle;
-	}
-      else if (strncmp (mangle, "__InterfaceZ", i+1) == 0)
-	{
-	  /* The interface symbol for a given class.  */
-	  obstack_grow_str (tempbuf, "interface$");
-	  mangle += i + 1;
-	  return mangle;
-	}
-      else if (strncmp (mangle, "__ModuleInfoZ", i+1) == 0)
-	{
-	  /* The ModuleInfo symbol for a given module.  */
-	  obstack_grow_str (tempbuf, "moduleinfo$");
-	  mangle += i + 1;
-	  return mangle;
-	}
-      obstack_grow (tempbuf, mangle, i);
-      mangle += i;
-    }
-  else
-    return NULL;
-
-  return mangle;
-}
-
-/* Test whether the current position of MANGLE is pointing to the
-   beginning of a mangled function parameter list, which starts with
-   the calling convention.  Returns 1 on success or 0 on failure.  */
-
-static int
-call_convention_p (const char *mangle)
-{
-  size_t i;
-
-  if ((mangle == NULL) || (*mangle == '\0'))
-    return 0;
-
-  switch (*mangle)
-    {
-    case 'F': case 'U': case 'V':
-    case 'W': case 'R':
-      return 1;
-
-    case 'M': /* Prefix for functions needing 'this'.  */
-      i = 1;
-      if (mangle[i] == 'x')
-	i++;
-
-      switch (mangle[i])
-	{
-	case 'F': case 'U': case 'V':
-	case 'W': case 'R':
-	  return 1;
-	}
-
-    default:
-      return 0;
-    }
-}
-
-/* Extract and demangle the symbol in MANGLE and append it to TEMPBUF.
-   Return the remaining signature on success or NULL on failure.  */
-
-const char *
-d_parse_symbol (struct obstack *tempbuf, const char *mangle)
-{
-  size_t n = 0;
-  do
-    {
-      if (n++)
-	obstack_grow_str (tempbuf, ".");
-
-      mangle = parse_identifier (tempbuf, mangle);
-
-      if (call_convention_p (mangle))
-	{
-	  char *saved;
-
-	  /* Skip over 'this' parameter.  */
-	  if (*mangle == 'M')
-	    mangle += (mangle[1] == 'x') ? 2 : 1;
-
-	  /* Skip over calling convention and attributes in qualified name.  */
-	  saved = obstack_next_free (tempbuf);
-	  mangle = parse_call_convention (tempbuf, mangle);
-	  mangle = parse_attributes (tempbuf, mangle);
-	  obstack_next_free (tempbuf) = saved;
-
-	  obstack_grow_str (tempbuf, "(");
-	  mangle = parse_function_args (tempbuf, mangle);
-	  obstack_grow_str (tempbuf, ")");
-
-	  /* Demangle the function return type as a kind of sanity test.  */
-	  if ((mangle != NULL) && !ISDIGIT (*mangle))
-	    {
-	      saved = obstack_next_free (tempbuf);
-	      mangle = parse_type (tempbuf, mangle);
-	      obstack_next_free (tempbuf) = saved;
-	    }
-	}
-    }
-  while ((mangle != NULL) && ISDIGIT (*mangle));
-
-  return mangle;
-}
-
 /* Implements the la_demangle language_defn routine for language D.  */
 
 char *
diff --git a/gdb/d-lang.h b/gdb/d-lang.h
index a1b4456..ca9126b 100644
--- a/gdb/d-lang.h
+++ b/gdb/d-lang.h
@@ -62,6 +62,8 @@ extern char *d_demangle (const char *mangled, int options);
 
 extern const struct builtin_d_type *builtin_d_type (struct gdbarch *);
 
+/* Defined in d-support.c  */
+
 extern const char *d_parse_symbol (struct obstack *, const char *);
 
 /* Defined in d-valprint.c  */
diff --git a/gdb/d-support.c b/gdb/d-support.c
new file mode 100644
index 0000000..8123981
--- /dev/null
+++ b/gdb/d-support.c
@@ -0,0 +1,621 @@
+/* Helper routines for D support in GDB.
+
+   Copyright (C) 2014 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program 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.
+
+   This program 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.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "d-lang.h"
+#include "gdb_obstack.h"
+
+#include "safe-ctype.h"
+
+static const char *parse_function_args (struct obstack *, const char *);
+static const char *parse_type (struct obstack *, const char *);
+
+
+/* Demangle the calling convention from MANGLE and append it to TEMPBUF.
+   Return the remaining string on success or NULL on failure.  */
+
+static const char *
+parse_call_convention (struct obstack *tempbuf, const char *mangle)
+{
+  if ((mangle == NULL) || (*mangle == '\0'))
+    return mangle;
+
+  switch (*mangle)
+    {
+    case 'F': /* (D) */
+      mangle++;
+      break;
+    case 'U': /* (C) */
+      mangle++;
+      obstack_grow_str (tempbuf, "extern(C) ");
+      break;
+    case 'W': /* (Windows) */
+      mangle++;
+      obstack_grow_str (tempbuf, "extern(Windows) ");
+      break;
+    case 'V': /* (Pascal) */
+      mangle++;
+      obstack_grow_str (tempbuf, "extern(Pascal) ");
+      break;
+    case 'R': /* (C++) */
+      mangle++;
+      obstack_grow_str (tempbuf, "extern(C++) ");
+      break;
+    default:
+      return NULL;
+    }
+
+  return mangle;
+}
+
+/* Demangle the D function attributes from MANGLE and append it to TEMPBUF.
+   Return the remaining string on success or NULL on failure.  */
+
+static const char *
+parse_attributes (struct obstack *tempbuf, const char *mangle)
+{
+  if ((mangle == NULL) || (*mangle == '\0'))
+    return mangle;
+
+  while (*mangle == 'N')
+    {
+      mangle++;
+      switch (*mangle)
+	{
+	case 'a': /* pure */
+	  mangle++;
+	  obstack_grow_str (tempbuf, "pure ");
+	  continue;
+	case 'b': /* nothrow */
+	  mangle++;
+	  obstack_grow_str (tempbuf, "nothrow ");
+	  continue;
+	case 'c': /* ref */
+	  mangle++;
+	  obstack_grow_str (tempbuf, "ref ");
+	  continue;
+	case 'd': /* @property */
+	  mangle++;
+	  obstack_grow_str (tempbuf, "@property ");
+	  continue;
+	case 'e': /* @trusted */
+	  mangle++;
+	  obstack_grow_str (tempbuf, "@trusted ");
+	  continue;
+	case 'f': /* @safe */
+	  mangle++;
+	  obstack_grow_str (tempbuf, "@safe ");
+	  continue;
+	case 'g':
+	case 'h':
+	  /* inout parameter is represented as 'Ng'.
+	     vector parameter is represented as 'Nh'.
+	     If we see this, then we know we're really in the
+	     parameter list.  Rewind and break.  */
+	  mangle--;
+	}
+      break;
+    }
+  return mangle;
+}
+
+/* Demangle the function type from MANGLE and append it to TEMPBUF.
+   Return the remaining string on success or NULL on failure.  */
+
+static const char *
+parse_function_type (struct obstack *tempbuf, const char *mangle)
+{
+  struct obstack obattr, obargs, obtype;
+  char *attr, *args, *type;
+  size_t szattr, szargs, sztype;
+
+  if ((mangle == NULL) || (*mangle == '\0'))
+    return mangle;
+
+  /* The order of the mangled string is:
+     TypeFunction ::
+        CallConvention FuncAttrs Arguments ArgClose Type
+
+     The demangled string is re-ordered as:
+        CallConvention Type Arguments FuncAttrs
+   */
+  obstack_init (&obattr);
+  obstack_init (&obargs);
+  obstack_init (&obtype);
+
+  /* Function call convention.  */
+  mangle = parse_call_convention (tempbuf, mangle);
+
+  /* Function attributes.  */
+  mangle = parse_attributes (&obattr, mangle);
+  szattr = obstack_object_size (&obattr);
+  attr = obstack_finish (&obattr);
+
+  /* Function arguments.  */
+  mangle = parse_function_args (&obargs, mangle);
+  szargs = obstack_object_size (&obargs);
+  args = obstack_finish (&obargs);
+
+  /* Function return type.  */
+  mangle = parse_type (&obtype, mangle);
+  sztype = obstack_object_size (&obtype);
+  type = obstack_finish (&obtype);
+
+  /* Append to buffer in order. */
+  obstack_grow (tempbuf, type, sztype);
+  obstack_grow_str (tempbuf, "(");
+  obstack_grow (tempbuf, args, szargs);
+  obstack_grow_str (tempbuf, ") ");
+  obstack_grow (tempbuf, attr, szattr);
+
+  obstack_free (&obattr, NULL);
+  obstack_free (&obargs, NULL);
+  obstack_free (&obtype, NULL);
+  return mangle;
+}
+
+/* Demangle the argument list from MANGLE and append it to TEMPBUF.
+   Return the remaining string on success or NULL on failure.  */
+
+static const char *
+parse_function_args (struct obstack *tempbuf, const char *mangle)
+{
+  size_t n = 0;
+
+  while ((mangle != NULL) && (*mangle != '\0'))
+    {
+      switch (*mangle)
+	{
+	case 'X': /* (variadic T t...) style.  */
+	  mangle++;
+	  obstack_grow_str (tempbuf, "...");
+	  return mangle;
+	case 'Y': /* (variadic T t, ...) style.  */
+	  mangle++;
+	  obstack_grow_str (tempbuf, ", ...");
+	  return mangle;
+	case 'Z': /* Normal function.  */
+	  mangle++;
+	  return mangle;
+	}
+
+      if (n++)
+	obstack_grow_str (tempbuf, ", ");
+
+      if (*mangle == 'M') /* scope(T) */
+	{
+	  mangle++;
+	  obstack_grow_str (tempbuf, "scope ");
+	}
+
+      switch (*mangle)
+	{
+	case 'J': /* out(T) */
+	  mangle++;
+	  obstack_grow_str (tempbuf, "out ");
+	  break;
+	case 'K': /* ref(T) */
+	  mangle++;
+	  obstack_grow_str (tempbuf, "ref ");
+	  break;
+	case 'L': /* lazy(T) */
+	  mangle++;
+	  obstack_grow_str (tempbuf, "lazy ");
+	  break;
+	}
+      mangle = parse_type (tempbuf, mangle);
+    }
+  return mangle;
+}
+
+/* Demangle the type from MANGLE and append it to TEMPBUF.
+   Return the remaining string on success or NULL on failure.  */
+
+static const char *
+parse_type (struct obstack *tempbuf, const char *mangle)
+{
+  if ((mangle == NULL) || (*mangle == '\0'))
+    return mangle;
+
+  switch (*mangle)
+    {
+    case 'O': /* shared(T) */
+      mangle++;
+      obstack_grow_str (tempbuf, "shared(");
+      mangle = parse_type (tempbuf, mangle);
+      obstack_grow_str (tempbuf, ")");
+      return mangle;
+    case 'x': /* const(T) */
+      mangle++;
+      obstack_grow_str (tempbuf, "const(");
+      mangle = parse_type (tempbuf, mangle);
+      obstack_grow_str (tempbuf, ")");
+      return mangle;
+    case 'y': /* immutable(T) */
+      mangle++;
+      obstack_grow_str (tempbuf, "immutable(");
+      mangle = parse_type (tempbuf, mangle);
+      obstack_grow_str (tempbuf, ")");
+      return mangle;
+    case 'N':
+      mangle++;
+      if (*mangle == 'g') /* wild(T) */
+	{
+	  mangle++;
+	  obstack_grow_str (tempbuf, "inout(");
+	  mangle = parse_type (tempbuf, mangle);
+	  obstack_grow_str (tempbuf, ")");
+	  return mangle;
+	}
+      else if (*mangle == 'h') /* vector(T) */
+	{
+	  mangle++;
+	  /* The basetype for vectors are always static arrays.  */
+	  if (*mangle != 'G')
+	    return NULL;
+	  obstack_grow_str (tempbuf, "__vector(");
+	  mangle = parse_type (tempbuf, mangle);
+	  obstack_grow_str (tempbuf, ")");
+	  return mangle;
+	}
+      else
+	return NULL;
+    case 'A': /* dynamic array (T[]) */
+      mangle++;
+      mangle = parse_type (tempbuf, mangle);
+      obstack_grow_str (tempbuf, "[]");
+      return mangle;
+    case 'G': /* static array (T[N]) */
+    {
+      const char *numptr;
+      size_t num = 0;
+      mangle++;
+
+      numptr = mangle;
+      while (ISDIGIT (*mangle))
+	{
+	  num++;
+	  mangle++;
+	}
+      mangle = parse_type (tempbuf, mangle);
+      obstack_grow_str (tempbuf, "[");
+      obstack_grow (tempbuf, numptr, num);
+      obstack_grow_str (tempbuf, "]");
+      return mangle;
+    }
+    case 'H': /* associative array (T[T]) */
+    {
+      struct obstack obtype;
+      char *type;
+      size_t sztype;
+      mangle++;
+
+      obstack_init (&obtype);
+      mangle = parse_type (&obtype, mangle);
+      sztype = obstack_object_size (&obtype);
+      type = obstack_finish (&obtype);
+
+      mangle = parse_type (tempbuf, mangle);
+      obstack_grow_str (tempbuf, "[");
+      obstack_grow (tempbuf, type, sztype);
+      obstack_grow_str (tempbuf, "]");
+
+      obstack_free (&obtype, NULL);
+      return mangle;
+    }
+    case 'P': /* pointer (T*) */
+      mangle++;
+      mangle = parse_type (tempbuf, mangle);
+      obstack_grow_str (tempbuf, "*");
+      return mangle;
+    case 'I': /* ident T */
+    case 'C': /* class T */
+    case 'S': /* struct T */
+    case 'E': /* enum T */
+    case 'T': /* typedef T */
+      mangle++;
+      return d_parse_symbol (tempbuf, mangle);
+    case 'D': /* delegate T */
+      mangle++;
+      mangle = parse_function_type (tempbuf, mangle);
+      obstack_grow_str (tempbuf, "delegate");
+      return mangle;
+    case 'B': /* tuple T */
+      /* TODO: Handle this.  */
+      return NULL;
+
+    /* Function types */
+    case 'F': case 'U': case 'W':
+    case 'V': case 'R':
+      mangle = parse_function_type (tempbuf, mangle);
+      obstack_grow_str (tempbuf, "function");
+      return mangle;
+
+    /* Basic types */
+    case 'n':
+      mangle++;
+      obstack_grow_str (tempbuf, "none");
+      return mangle;
+    case 'v':
+      mangle++;
+      obstack_grow_str (tempbuf, "void");
+      return mangle;
+    case 'g':
+      mangle++;
+      obstack_grow_str (tempbuf, "byte");
+      return mangle;
+    case 'h':
+      mangle++;
+      obstack_grow_str (tempbuf, "ubyte");
+      return mangle;
+    case 's':
+      mangle++;
+      obstack_grow_str (tempbuf, "short");
+      return mangle;
+    case 't':
+      mangle++;
+      obstack_grow_str (tempbuf, "ushort");
+      return mangle;
+    case 'i':
+      mangle++;
+      obstack_grow_str (tempbuf, "int");
+      return mangle;
+    case 'k':
+      mangle++;
+      obstack_grow_str (tempbuf, "uint");
+      return mangle;
+    case 'l':
+      mangle++;
+      obstack_grow_str (tempbuf, "long");
+      return mangle;
+    case 'm':
+      mangle++;
+      obstack_grow_str (tempbuf, "ulong");
+      return mangle;
+    case 'f':
+      mangle++;
+      obstack_grow_str (tempbuf, "float");
+      return mangle;
+    case 'd':
+      mangle++;
+      obstack_grow_str (tempbuf, "double");
+      return mangle;
+    case 'e':
+      mangle++;
+      obstack_grow_str (tempbuf, "real");
+      return mangle;
+
+    /* Imaginary and Complex types */
+    case 'o':
+      mangle++;
+      obstack_grow_str (tempbuf, "ifloat");
+      return mangle;
+    case 'p':
+      mangle++;
+      obstack_grow_str (tempbuf, "idouble");
+      return mangle;
+    case 'j':
+      mangle++;
+      obstack_grow_str (tempbuf, "ireal");
+      return mangle;
+    case 'q':
+      mangle++;
+      obstack_grow_str (tempbuf, "cfloat");
+      return mangle;
+    case 'r':
+      mangle++;
+      obstack_grow_str (tempbuf, "cdouble");
+      return mangle;
+    case 'c':
+      mangle++;
+      obstack_grow_str (tempbuf, "creal");
+      return mangle;
+
+    /* Other types */
+    case 'b':
+      mangle++;
+      obstack_grow_str (tempbuf, "bool");
+      return mangle;
+    case 'a':
+      mangle++;
+      obstack_grow_str (tempbuf, "char");
+      return mangle;
+    case 'u':
+      mangle++;
+      obstack_grow_str (tempbuf, "wchar");
+      return mangle;
+    case 'w':
+      mangle++;
+      obstack_grow_str (tempbuf, "dchar");
+      return mangle;
+
+    default: /* unhandled */
+      return NULL;
+    }
+}
+
+/* Extract the identifier from MANGLE and append it to TEMPBUF.
+   Return the remaining string on success or NULL on failure.  */
+
+static const char *
+parse_identifier (struct obstack *tempbuf, const char *mangle)
+{
+  if ((mangle == NULL) || (*mangle == '\0'))
+    return mangle;
+
+  if (ISDIGIT (*mangle))
+    {
+      char *endptr;
+      long i = strtol (mangle, &endptr, 10);
+
+      if (i <= 0 || strlen (endptr) < i)
+	return NULL;
+
+      mangle = endptr;
+
+      /* No support for demangling templates.  */
+      if (i >= 5 && strncmp (mangle, "__T", 3) == 0)
+	return NULL;
+
+      if (strncmp (mangle, "__ctor", i) == 0)
+	{
+	  /* Constructor symbol for a class/struct.  */
+	  obstack_grow_str (tempbuf, "this");
+	  mangle += i;
+	  return mangle;
+	}
+      else if (strncmp (mangle, "__dtor", i) == 0)
+	{
+	  /* Destructor symbol for a class/struct.  */
+	  obstack_grow_str (tempbuf, "~this");
+	  mangle += i;
+	  return mangle;
+	}
+      else if (strncmp (mangle, "__postblit", i) == 0)
+	{
+	  /* Postblit symbol for a struct.  */
+	  obstack_grow_str (tempbuf, "this(this)");
+	  mangle += i;
+	  return mangle;
+	}
+      else if (strncmp (mangle, "__initZ", i+1) == 0)
+	{
+	  /* The static initialiser for a given symbol.  */
+	  obstack_grow_str (tempbuf, "init$");
+	  mangle += i + 1;
+	  return mangle;
+	}
+      else if (strncmp (mangle, "__ClassZ", i+1) == 0)
+	{
+	  /* The classinfo symbol for a given class.  */
+	  obstack_grow_str (tempbuf, "classinfo$");
+	  mangle += i + 1;
+	  return mangle;
+	}
+      else if (strncmp (mangle, "__vtblZ", i+1) == 0)
+	{
+	  /* The vtable symbol for a given class.  */
+	  obstack_grow_str (tempbuf, "vtbl$");
+	  mangle += i + 1;
+	  return mangle;
+	}
+      else if (strncmp (mangle, "__InterfaceZ", i+1) == 0)
+	{
+	  /* The interface symbol for a given class.  */
+	  obstack_grow_str (tempbuf, "interface$");
+	  mangle += i + 1;
+	  return mangle;
+	}
+      else if (strncmp (mangle, "__ModuleInfoZ", i+1) == 0)
+	{
+	  /* The ModuleInfo symbol for a given module.  */
+	  obstack_grow_str (tempbuf, "moduleinfo$");
+	  mangle += i + 1;
+	  return mangle;
+	}
+      obstack_grow (tempbuf, mangle, i);
+      mangle += i;
+    }
+  else
+    return NULL;
+
+  return mangle;
+}
+
+/* Test whether the current position of MANGLE is pointing to the
+   beginning of a mangled function parameter list, which starts with
+   the calling convention.  Returns 1 on success or 0 on failure.  */
+
+static int
+call_convention_p (const char *mangle)
+{
+  size_t i;
+
+  if ((mangle == NULL) || (*mangle == '\0'))
+    return 0;
+
+  switch (*mangle)
+    {
+    case 'F': case 'U': case 'V':
+    case 'W': case 'R':
+      return 1;
+
+    case 'M': /* Prefix for functions needing 'this'.  */
+      i = 1;
+      if (mangle[i] == 'x')
+	i++;
+
+      switch (mangle[i])
+	{
+	case 'F': case 'U': case 'V':
+	case 'W': case 'R':
+	  return 1;
+	}
+
+    default:
+      return 0;
+    }
+}
+
+/* Extract and demangle the symbol in MANGLE and append it to TEMPBUF.
+   Return the remaining signature on success or NULL on failure.  */
+
+const char *
+d_parse_symbol (struct obstack *tempbuf, const char *mangle)
+{
+  size_t n = 0;
+  do
+    {
+      if (n++)
+	obstack_grow_str (tempbuf, ".");
+
+      mangle = parse_identifier (tempbuf, mangle);
+
+      if (call_convention_p (mangle))
+	{
+	  char *saved;
+
+	  /* Skip over 'this' parameter.  */
+	  if (*mangle == 'M')
+	    mangle += (mangle[1] == 'x') ? 2 : 1;
+
+	  /* Skip over calling convention and attributes in qualified name.  */
+	  saved = obstack_next_free (tempbuf);
+	  mangle = parse_call_convention (tempbuf, mangle);
+	  mangle = parse_attributes (tempbuf, mangle);
+	  obstack_next_free (tempbuf) = saved;
+
+	  obstack_grow_str (tempbuf, "(");
+	  mangle = parse_function_args (tempbuf, mangle);
+	  obstack_grow_str (tempbuf, ")");
+
+	  /* Demangle the function return type as a kind of sanity test.  */
+	  if ((mangle != NULL) && !ISDIGIT (*mangle))
+	    {
+	      saved = obstack_next_free (tempbuf);
+	      mangle = parse_type (tempbuf, mangle);
+	      obstack_next_free (tempbuf) = saved;
+	    }
+	}
+    }
+  while ((mangle != NULL) && ISDIGIT (*mangle));
+
+  return mangle;
+}
+