Rearrange the file tree.

[u/mdw/catacomb] / mpscan.h

diff --git a/mpscan.h b/mpscan.h
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--- a/mpscan.h
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@@ -1,172 +0,0 @@
-/* -*-c-*-
- *
- * $Id: mpscan.h,v 1.5 2004/04/08 01:36:15 mdw Exp $
- *
- * Sequential bit scan of multiprecision integers
- *
- * (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.
- */
-
-#ifndef CATACOMB_MPSCAN_H
-#define CATACOMB_MPSCAN_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#ifndef CATACOMB_MPW_H
-#  include "mpw.h"
-#endif
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct mpscan {
-  const mpw *v, *vl;                   /* Vector of words to scan */
-  mpw w;                               /* Current word to scan */
-  int bits;                            /* Number of bits left in @w@ */
-} mpscan;
-
-/*----- Right-to-left scanning --------------------------------------------*/
-
-/* --- @mpscan_initx@ --- *
- *
- * Arguments:  @mpscan *m@ = pointer to bitscanner structure
- *             @const mpw *v, *vl@ = vector of words to scan
- *
- * Returns:    ---
- *
- * Use:                Initializes a bitscanner from a low-level base-and-limit
- *             representation of an integer.  Initially no bit is ready; you
- *             must call @mpscan_step@ before anything useful will come
- *             out.
- */
-
-#define MPSCAN_INITX(m_, v_, vl_) do {                                 \
-  mpscan *_m = (m_);                                                   \
-  _m->v = (v_);                                                                \
-  _m->vl = (vl_);                                                      \
-  _m->bits = 0;                                                                \
-} while (0)
-
-extern void mpscan_initx(mpscan */*m*/, const mpw */*v*/, const mpw */*vl*/);
-
-/* --- @mpscan_step@ --- *
- *
- * Arguments:  @mpscan *m@ = pointer to bitscanner
- *
- * Returns:    Nonzero if there is another bit to read.
- *
- * Use:                Steps on to the next bit in the integer.  The macro version
- *             evaluates its argument multiple times.
- */
-
-#define MPSCAN_STEP(m)                                                 \
-  ((m)->bits ? ((m)->w >>= 1, (m)->bits--, 1) :                                \
-   (m)->v < (m)->vl ? ((m)->w = *(m)->v++,                             \
-                      (m)->bits = MPW_BITS - 1, 1) :                   \
-   0)
-
-extern int mpscan_step(mpscan */*m*/);
-
-/* --- @mpscan_bit@ --- *
- *
- * Arguments:  @const mpscan *m@ = pointer to bitscanner
- *
- * Returns:    The value of the current bit.
- *
- * Use:                Reads the value of the current bit looked at by a
- *             bitscanner.
- */
-
-#define MPSCAN_BIT(m) ((m)->w & 1)
-
-extern int mpscan_bit(const mpscan */*m*/);
-
-/*----- Left-to right-scanning --------------------------------------------*/
-
-/* --- @mpscan_rinitx@ --- *
- *
- * Arguments:  @mpscan *m@ = pointer to bitscanner structure
- *             @const mpw *v, *vl@ = vector of words to scan
- *
- * Returns:    ---
- *
- * Use:                Initializes a reverse bitscanner from a low-level
- *             vector-and-length representation of an integer.  Initially no
- *             bit is ready; you must call @mpscan_rstep@ before anything
- *             useful will come out.
- */
-
-#define MPSCAN_RINITX(m_, v_, vl_) do {                                        \
-  mpscan *_m = (m_);                                                   \
-  _m->v = (v_);                                                                \
-  _m->vl = (vl_);                                                      \
-  while (_m->vl > _m->v && !_m->vl[-1])                                        \
-    _m->vl--;                                                          \
-  _m->bits = 0;                                                                \
-} while (0)
-
-extern void mpscan_rinitx(mpscan */*m*/,
-                         const mpw */*v*/, const mpw */*vl*/);
-
-/* --- @mpscan_rstep@ --- *
- *
- * Arguments:  @mpscan *m@ = pointer to bitscanner
- *
- * Returns:    Nonzero if there is another bit to read.
- *
- * Use:                Steps on to the next bit in the integer.  The macro version
- *             evaluates its argument multiple times.
- */
-
-#define MPSCAN_RSTEP(m)                                                        \
-  ((m)->bits ? ((m)->w <<= 1, (m)->bits--, 1) :                                \
-   (m)->vl > (m)->v ? ((m)->w = *--(m)->vl,                            \
-                      (m)->bits = MPW_BITS - 1, 1) :                   \
-   0)
-
-extern int mpscan_rstep(mpscan */*m*/);
-
-/* --- @mpscan_rbit@ --- *
- *
- * Arguments:  @const mpscan *m@ = pointer to bitscanner
- *
- * Returns:    The value of the current bit.
- *
- * Use:                Reads the value of the current bit looked at by a
- *             reverse bitscanner.
- */
-
-#define MPSCAN_RBIT(m) (((m)->w >> (MPW_BITS - 1)) & 1)
-
-extern int mpscan_rbit(const mpscan */*m*/);
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
-  }
-#endif
-
-#endif