Remerged dmd2 frontend using git subtree

dmd2/root/rmem.c

@@ -0,0 +1,155 @@
+
+/* Copyright (c) 2000 Digital Mars      */
+/* All Rights Reserved                  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if linux || __APPLE__ || __FreeBSD__ || __OpenBSD__ || __sun&&__SVR4
+#include "../root/rmem.h"
+#else
+#include "rmem.h"
+#endif
+
+/* This implementation of the storage allocator uses the standard C allocation package.
+ */
+
+Mem mem;
+
+void Mem::init()
+{
+}
+
+char *Mem::strdup(const char *s)
+{
+    char *p;
+
+    if (s)
+    {
+        p = ::strdup(s);
+        if (p)
+            return p;
+        error();
+    }
+    return NULL;
+}
+
+void *Mem::malloc(size_t size)
+{   void *p;
+
+    if (!size)
+        p = NULL;
+    else
+    {
+        p = ::malloc(size);
+        if (!p)
+            error();
+    }
+    return p;
+}
+
+void *Mem::calloc(size_t size, size_t n)
+{   void *p;
+
+    if (!size || !n)
+        p = NULL;
+    else
+    {
+        p = ::calloc(size, n);
+        if (!p)
+            error();
+    }
+    return p;
+}
+
+void *Mem::realloc(void *p, size_t size)
+{
+    if (!size)
+    {   if (p)
+        {   ::free(p);
+            p = NULL;
+        }
+    }
+    else if (!p)
+    {
+        p = ::malloc(size);
+        if (!p)
+            error();
+    }
+    else
+    {
+        void *psave = p;
+        p = ::realloc(psave, size);
+        if (!p)
+        {   free(psave);
+            error();
+        }
+    }
+    return p;
+}
+
+void Mem::free(void *p)
+{
+    if (p)
+        ::free(p);
+}
+
+void *Mem::mallocdup(void *o, size_t size)
+{   void *p;
+
+    if (!size)
+        p = NULL;
+    else
+    {
+        p = ::malloc(size);
+        if (!p)
+            error();
+        else
+            memcpy(p,o,size);
+    }
+    return p;
+}
+
+void Mem::error()
+{
+    printf("Error: out of memory\n");
+    exit(EXIT_FAILURE);
+}
+
+void Mem::fullcollect()
+{
+}
+
+void Mem::mark(void *pointer)
+{
+    (void) pointer;             // necessary for VC /W4
+}
+
+void Mem::setStackBottom(void *bottom)
+{
+}
+
+void Mem::addroots(char* pStart, char* pEnd)
+{
+}
+
+
+/* =================================================== */
+
+void * operator new(size_t m_size)
+{
+    void *p = malloc(m_size);
+    if (p)
+        return p;
+    printf("Error: out of memory\n");
+    exit(EXIT_FAILURE);
+    return p;
+}
+
+void operator delete(void *p)
+{
+    free(p);
+}
+
+