Initial version of Cgraph created.

diff --git a/lib/cgraph/malloc.h b/lib/cgraph/malloc.h
new file mode 100644 (file)
index 0000000..23e8f93
--- /dev/null
+++ b/lib/cgraph/malloc.h
@@ -0,0 +1,17 @@
+/* $Id$ $Revision$ */
+/* vim:set shiftwidth=4 ts=8: */
+
+/**********************************************************
+*      This software is part of the graphviz package      *
+*                http://www.graphviz.org/                 *
+*                                                         *
+*            Copyright (c) 1994-2004 AT&T Corp.           *
+*                and is licensed under the                *
+*            Common Public License, Version 1.0           *
+*                      by AT&T Corp.                      *
+*                                                         *
+*        Information and Software Systems Research        *
+*              AT&T Research, Florham Park NJ             *
+**********************************************************/
+
+/* This defeats the <malloc.h> that yacc generated code includes */

diff --git a/lib/cgraph/mem.c b/lib/cgraph/mem.c
new file mode 100644 (file)
index 0000000..eb52d66
--- /dev/null
+++ b/lib/cgraph/mem.c
@@ -0,0 +1,157 @@
+/* $Id$ $Revision$ */
+/* vim:set shiftwidth=4 ts=8: */
+
+/**********************************************************
+*      This software is part of the graphviz package      *
+*                http://www.graphviz.org/                 *
+*                                                         *
+*            Copyright (c) 1994-2004 AT&T Corp.           *
+*                and is licensed under the                *
+*            Common Public License, Version 1.0           *
+*                      by AT&T Corp.                      *
+*                                                         *
+*        Information and Software Systems Research        *
+*              AT&T Research, Florham Park NJ             *
+**********************************************************/
+
+#include <cghdr.h>
+
+/* memory management discipline and entry points */
+
+#if (HAVE_AST || HAVE_VMALLOC)
+
+       /* vmalloc based allocator */
+static void *memopen(void)
+{
+#if DEBUG || MEMDEBUG
+    return vmopen(Vmdcheap, Vmdebug,
+                 VM_MTDEBUG | VM_DBCHECK | VM_DBABORT | VM_TRACE);
+#else
+    return vmopen(Vmdcheap, Vmbest, VM_MTBEST);
+#endif
+}
+
+static void *memalloc(void *heap, size_t request)
+{
+    void *rv;
+    rv = vmalloc((Vmalloc_t *) heap, request);
+    memset(rv, 0, request);
+    return rv;
+}
+
+static void *memresize(void *heap, void *ptr, size_t oldsize,
+                      size_t request)
+{
+    void *rv;
+
+    rv = vmresize((Vmalloc_t *) heap, ptr, request, VM_RSCOPY | VM_RSZERO);
+    return rv;
+}
+
+static void memfree(void *heap, void *ptr)
+{
+    vmfree((Vmalloc_t *) heap, ptr);
+}
+
+static void memclose(void *heap)
+{
+    vmclose((Vmalloc_t *) heap);
+}
+
+Agmemdisc_t AgMemDisc =
+    { memopen, memalloc, memresize, memfree, memclose };
+
+#else
+
+       /* malloc based allocator */
+
+static void *memopen(void)
+{
+    return NIL(void *);
+}
+
+static void *memalloc(void *heap, size_t request)
+{
+    void *rv;
+
+    NOTUSED(heap);
+    rv = malloc(request);
+    memset(rv, 0, request);
+    return rv;
+}
+
+static void *memresize(void *heap, void *ptr, size_t oldsize,
+                      size_t request)
+{
+    void *rv;
+
+    NOTUSED(heap);
+    rv = realloc(ptr, request);
+    if (request > oldsize)
+       memset((char *) rv + oldsize, 0, request - oldsize);
+    return rv;
+}
+
+static void memfree(void *heap, void *ptr)
+{
+    NOTUSED(heap);
+    free(ptr);
+}
+
+#ifndef WRONG
+#define memclose 0
+#else
+static void memclose(void *heap)
+{
+    NOTUSED(heap);
+}
+#endif
+
+Agmemdisc_t AgMemDisc =
+    { memopen, memalloc, memresize, memfree, memclose };
+
+#endif
+
+
+void *agalloc(Agraph_t * g, size_t size)
+{
+    void *mem;
+
+    mem = AGDISC(g, mem)->alloc(AGCLOS(g, mem), size);
+    if (mem == NIL(void *))
+        agerr(AGERR,"memory allocation failure");
+    return mem;
+}
+
+void *agrealloc(Agraph_t * g, void *ptr, size_t oldsize, size_t size)
+{
+    void *mem;
+
+    if (size > 0) {
+       if (ptr == 0)
+           mem = agalloc(g, size);
+       else
+           mem =
+               AGDISC(g, mem)->resize(AGCLOS(g, mem), ptr, oldsize, size);
+       if (mem == NIL(void *))
+            agerr(AGERR,"memory re-allocation failure");
+    } else
+       mem = NIL(void *);
+    return mem;
+}
+
+void agfree(Agraph_t * g, void *ptr)
+{
+    if (ptr)
+       (AGDISC(g, mem)->free) (AGCLOS(g, mem), ptr);
+}
+
+#ifndef _VMALLOC_H
+struct _vmalloc_s {
+    char unused;
+};
+#endif
+struct _vmalloc_s *agheap(Agraph_t * g)
+{
+    return AGCLOS(g, mem);
+}