New multiprecision integer arithmetic suite.

[u/mdw/catacomb] / mpalloc.h

diff --git a/mpalloc.h b/mpalloc.h
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+/* -*-c-*-
+ *
+ * $Id: mpalloc.h,v 1.1 1999/11/17 18:02:16 mdw Exp $
+ *
+ * Allocation and freeing of MP buffers
+ *
+ * (c) 1999 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------* 
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ * 
+ * Catacomb 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 Library General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------* 
+ *
+ * $Log: mpalloc.h,v $
+ * Revision 1.1  1999/11/17 18:02:16  mdw
+ * New multiprecision integer arithmetic suite.
+ *
+ */
+
+#ifndef MPARENA_H
+#define MPARENA_H
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+/*----- Header files ------------------------------------------------------*/
+
+#ifndef MPW_H
+#  include "mpw.h"
+#endif
+
+/*----- Data structures ---------------------------------------------------*/
+
+typedef struct mparena_node {
+  struct mparena_node *left, *right;
+  mpw *v;
+} mparena_node;
+
+typedef struct mparena {
+  mparena_node *root;
+} mparena_arena;
+
+/*----- Magical constants -------------------------------------------------*/
+
+#define MPARENA_GLOBAL ((mparena *)0)
+
+/*----- Functions provided ------------------------------------------------*/
+
+/* --- @mparena_create@ --- *
+ *
+ * Arguments:  @mparena *a@ = pointer to arena block
+ *
+ * Returns:    ---
+ *
+ * Use:                Initializes an MP arena so that blocks can be allocated from
+ *             it.
+ */
+
+extern void mparena_create(mparena */*a*/);
+
+#define MPARENA_INIT { 0 }
+
+/* --- @mparena_destroy@ --- *
+ *
+ * Arguments:  @mparena *a@ = pointer to arena block
+ *
+ * Returns:    ---
+ *
+ * Use:                Frees an MP arena, and all the vectors held within it.  The
+ *             blocks which are currently allocated can be freed into some
+ *             other arena.
+ */
+
+extern void mparena_destroy(mparena */*a*/);
+
+/* --- @mp_alloc@ --- *
+ *
+ * Arguments:  @mparena *a@ = pointer to arena block
+ *             @size_t n@ = number of digits required
+ *
+ * Returns:    Pointer to a suitably sized block.
+ *
+ * Use:                Allocates a lump of data suitable for use as an array of MP
+ *             digits.
+ */
+
+extern mpw *mp_alloc(mparena */*a*/, size_t /*n*/);
+
+/* --- @mp_free@ --- *
+ *
+ * Arguments:  @mparena *a@ = pointer to arena block
+ *             @mpw *v@ = pointer to allocated vector
+ *
+ * Returns:    ---
+ *
+ * Use:                Returns an MP vector to an arena.  It doesn't have to be
+ *             returned to the arena from which it was allocated.
+ */
+
+extern mpw *mp_free(mparena */*a*/, mpw */*v*/);
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif