libguile/pairs.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_PAIRS_H
   4 #define SCM_PAIRS_H
   5
   6 /* Copyright (C) 1995,1996,2000,2001, 2004, 2006, 2008, 2009, 2010 Free Software Foundation, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 3 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  */
  23
  24 \f
  25
  26 #include "libguile/__scm.h"
  27
  28 \f
  29
  30 #if (SCM_DEBUG_PAIR_ACCESSES == 1)
  31 # define SCM_VALIDATE_PAIR(cell, expr) \
  32     ((!scm_is_pair (cell) ? scm_error_pair_access (cell), 0 : 0), (expr))
  33 #else
  34 # define SCM_VALIDATE_PAIR(cell, expr) (expr)
  35 #endif
  36
  37 /*
  38  * Use scm_is_null_and_not_nil if it's important (for correctness)
  39  * that #nil must NOT be considered null.
  40  */
  41 #define scm_is_null_and_not_nil(x)     (scm_is_eq ((x), SCM_EOL))
  42
  43 /*
  44  * Use scm_is_null_assume_not_nil if
  45 #nil will never be tested,
  46  * for increased efficiency.
  47  */
  48 #define scm_is_null_assume_not_nil(x)  (scm_is_eq ((x), SCM_EOL))
  49
  50 /*
  51  * See the comments preceeding the definitions of SCM_BOOL_F and
  52  * SCM_MATCHES_BITS_IN_COMMON in tags.h for more information on
  53  * how the following macro works.
  54  */
  55 #define scm_is_null_or_nil(x)  \
  56   (SCM_MATCHES_BITS_IN_COMMON ((x), SCM_ELISP_NIL, SCM_EOL))
  57
  58
  59 /* Older spellings for these nil predicates. */
  60 #define SCM_NILP(x) (scm_is_eq ((x), SCM_ELISP_NIL))
  61 #define SCM_NULL_OR_NIL_P(x) (scm_is_null_or_nil (x))
  62
  63
  64 /* #nil is null. */
  65 #define scm_is_null(x)          (scm_is_null_or_nil(x))
  66
  67 #define SCM_CAR(x)              (SCM_VALIDATE_PAIR (x, SCM_CELL_OBJECT_0 (x)))
  68 #define SCM_CDR(x)              (SCM_VALIDATE_PAIR (x, SCM_CELL_OBJECT_1 (x)))
  69
  70 #define SCM_SETCAR(x, v)        (SCM_VALIDATE_PAIR (x, SCM_SET_CELL_OBJECT_0 ((x), (v))))
  71 #define SCM_SETCDR(x, v)        (SCM_VALIDATE_PAIR (x, SCM_SET_CELL_OBJECT_1 ((x), (v))))
  72
  73 #define SCM_CAAR(OBJ)           SCM_CAR (SCM_CAR (OBJ))
  74 #define SCM_CDAR(OBJ)           SCM_CDR (SCM_CAR (OBJ))
  75 #define SCM_CADR(OBJ)           SCM_CAR (SCM_CDR (OBJ))
  76 #define SCM_CDDR(OBJ)           SCM_CDR (SCM_CDR (OBJ))
  77
  78 #define SCM_CAAAR(OBJ)          SCM_CAR (SCM_CAR (SCM_CAR (OBJ)))
  79 #define SCM_CDAAR(OBJ)          SCM_CDR (SCM_CAR (SCM_CAR (OBJ)))
  80 #define SCM_CADAR(OBJ)          SCM_CAR (SCM_CDR (SCM_CAR (OBJ)))
  81 #define SCM_CDDAR(OBJ)          SCM_CDR (SCM_CDR (SCM_CAR (OBJ)))
  82 #define SCM_CAADR(OBJ)          SCM_CAR (SCM_CAR (SCM_CDR (OBJ)))
  83 #define SCM_CDADR(OBJ)          SCM_CDR (SCM_CAR (SCM_CDR (OBJ)))
  84 #define SCM_CADDR(OBJ)          SCM_CAR (SCM_CDR (SCM_CDR (OBJ)))
  85 #define SCM_CDDDR(OBJ)          SCM_CDR (SCM_CDR (SCM_CDR (OBJ)))
  86
  87 #define SCM_CAAAAR(OBJ)         SCM_CAR (SCM_CAR (SCM_CAR (SCM_CAR (OBJ))))
  88 #define SCM_CDAAAR(OBJ)         SCM_CDR (SCM_CAR (SCM_CAR (SCM_CAR (OBJ))))
  89 #define SCM_CADAAR(OBJ)         SCM_CAR (SCM_CDR (SCM_CAR (SCM_CAR (OBJ))))
  90 #define SCM_CDDAAR(OBJ)         SCM_CDR (SCM_CDR (SCM_CAR (SCM_CAR (OBJ))))
  91 #define SCM_CAADAR(OBJ)         SCM_CAR (SCM_CAR (SCM_CDR (SCM_CAR (OBJ))))
  92 #define SCM_CDADAR(OBJ)         SCM_CDR (SCM_CAR (SCM_CDR (SCM_CAR (OBJ))))
  93 #define SCM_CADDAR(OBJ)         SCM_CAR (SCM_CDR (SCM_CDR (SCM_CAR (OBJ))))
  94 #define SCM_CDDDAR(OBJ)         SCM_CDR (SCM_CDR (SCM_CDR (SCM_CAR (OBJ))))
  95 #define SCM_CAAADR(OBJ)         SCM_CAR (SCM_CAR (SCM_CAR (SCM_CDR (OBJ))))
  96 #define SCM_CDAADR(OBJ)         SCM_CDR (SCM_CAR (SCM_CAR (SCM_CDR (OBJ))))
  97 #define SCM_CADADR(OBJ)         SCM_CAR (SCM_CDR (SCM_CAR (SCM_CDR (OBJ))))
  98 #define SCM_CDDADR(OBJ)         SCM_CDR (SCM_CDR (SCM_CAR (SCM_CDR (OBJ))))
  99 #define SCM_CAADDR(OBJ)         SCM_CAR (SCM_CAR (SCM_CDR (SCM_CDR (OBJ))))
 100 #define SCM_CDADDR(OBJ)         SCM_CDR (SCM_CAR (SCM_CDR (SCM_CDR (OBJ))))
 101 #define SCM_CADDDR(OBJ)         SCM_CAR (SCM_CDR (SCM_CDR (SCM_CDR (OBJ))))
 102 #define SCM_CDDDDR(OBJ)         SCM_CDR (SCM_CDR (SCM_CDR (SCM_CDR (OBJ))))
 103
 104 \f
 105
 106 #if (SCM_DEBUG_PAIR_ACCESSES == 1)
 107 SCM_API void scm_error_pair_access (SCM);
 108 #endif
 109
 110 SCM_API SCM scm_cons (SCM x, SCM y);
 111 SCM_API SCM scm_cons2 (SCM w, SCM x, SCM y);
 112 SCM_API SCM scm_pair_p (SCM x);
 113 SCM_API SCM scm_car (SCM x);
 114 SCM_API SCM scm_cdr (SCM x);
 115 SCM_API SCM scm_set_car_x (SCM pair, SCM value);
 116 SCM_API SCM scm_set_cdr_x (SCM pair, SCM value);
 117
 118 SCM_API SCM scm_cddr (SCM x);
 119 SCM_API SCM scm_cdar (SCM x);
 120 SCM_API SCM scm_cadr (SCM x);
 121 SCM_API SCM scm_caar (SCM x);
 122 SCM_API SCM scm_cdddr (SCM x);
 123 SCM_API SCM scm_cddar (SCM x);
 124 SCM_API SCM scm_cdadr (SCM x);
 125 SCM_API SCM scm_cdaar (SCM x);
 126 SCM_API SCM scm_caddr (SCM x);
 127 SCM_API SCM scm_cadar (SCM x);
 128 SCM_API SCM scm_caadr (SCM x);
 129 SCM_API SCM scm_caaar (SCM x);
 130 SCM_API SCM scm_cddddr (SCM x);
 131 SCM_API SCM scm_cdddar (SCM x);
 132 SCM_API SCM scm_cddadr (SCM x);
 133 SCM_API SCM scm_cddaar (SCM x);
 134 SCM_API SCM scm_cdaddr (SCM x);
 135 SCM_API SCM scm_cdadar (SCM x);
 136 SCM_API SCM scm_cdaadr (SCM x);
 137 SCM_API SCM scm_cdaaar (SCM x);
 138 SCM_API SCM scm_cadddr (SCM x);
 139 SCM_API SCM scm_caddar (SCM x);
 140 SCM_API SCM scm_cadadr (SCM x);
 141 SCM_API SCM scm_cadaar (SCM x);
 142 SCM_API SCM scm_caaddr (SCM x);
 143 SCM_API SCM scm_caadar (SCM x);
 144 SCM_API SCM scm_caaadr (SCM x);
 145 SCM_API SCM scm_caaaar (SCM x);
 146
 147 SCM_INTERNAL void scm_init_pairs (void);
 148
 149 #endif  /* SCM_PAIRS_H */
 150
 151 /*
 152   Local Variables:
 153   c-file-style: "gnu"
 154   End:
 155 */