libguile/eq.c

   1 /*      Copyright (C) 1995,1996 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  16  *
  17  * As a special exception, the Free Software Foundation gives permission
  18  * for additional uses of the text contained in its release of GUILE.
  19  *
  20  * The exception is that, if you link the GUILE library with other files
  21  * to produce an executable, this does not by itself cause the
  22  * resulting executable to be covered by the GNU General Public License.
  23  * Your use of that executable is in no way restricted on account of
  24  * linking the GUILE library code into it.
  25  *
  26  * This exception does not however invalidate any other reasons why
  27  * the executable file might be covered by the GNU General Public License.
  28  *
  29  * This exception applies only to the code released by the
  30  * Free Software Foundation under the name GUILE.  If you copy
  31  * code from other Free Software Foundation releases into a copy of
  32  * GUILE, as the General Public License permits, the exception does
  33  * not apply to the code that you add in this way.  To avoid misleading
  34  * anyone as to the status of such modified files, you must delete
  35  * this exception notice from them.
  36  *
  37  * If you write modifications of your own for GUILE, it is your choice
  38  * whether to permit this exception to apply to your modifications.
  39  * If you do not wish that, delete this exception notice.
  40  */
  41 \f
  42 #include <stdio.h>
  43 #include "_scm.h"
  44
  45 \f
  46 SCM_PROC1 (s_eq_p, "eq?", scm_tc7_rpsubr, scm_eq_p);
  47 #ifdef __STDC__
  48 SCM
  49 scm_eq_p (SCM x, SCM y)
  50 #else
  51 SCM
  52 scm_eq_p (x, y)
  53      SCM x;
  54      SCM y;
  55 #endif
  56 {
  57   return ((x==y)
  58           ? SCM_BOOL_T
  59           : SCM_BOOL_F);
  60 }
  61
  62
  63 SCM_PROC1 (s_eqv_p, "eqv?", scm_tc7_rpsubr, scm_eqv_p);
  64 #ifdef __STDC__
  65 SCM
  66 scm_eqv_p (SCM x, SCM y)
  67 #else
  68 SCM
  69 scm_eqv_p (x, y)
  70      SCM x;
  71      SCM y;
  72 #endif
  73 {
  74   if (x==y) return SCM_BOOL_T;
  75   if SCM_IMP(x) return SCM_BOOL_F;
  76   if SCM_IMP(y) return SCM_BOOL_F;
  77   /* this ensures that types and scm_length are the same. */
  78   if (SCM_CAR(x) != SCM_CAR(y)) return SCM_BOOL_F;
  79   if SCM_NUMP(x) {
  80 # ifdef SCM_BIGDIG
  81     if SCM_BIGP(x) return (0==scm_bigcomp(x, y)) ? SCM_BOOL_T : SCM_BOOL_F;
  82 # endif
  83 #ifdef SCM_FLOATS
  84     if (SCM_REALPART(x) != SCM_REALPART(y)) return SCM_BOOL_F;
  85     if (SCM_CPLXP(x) && (SCM_IMAG(x) != SCM_IMAG(y))) return SCM_BOOL_F;
  86 #endif
  87     return SCM_BOOL_T;
  88   }
  89   return SCM_BOOL_F;
  90 }
  91
  92
  93 SCM_PROC1 (s_equal_p, "equal?", scm_tc7_rpsubr, scm_equal_p);
  94 #ifdef __STDC__
  95 SCM
  96 scm_equal_p (SCM x, SCM y)
  97 #else
  98 SCM
  99 scm_equal_p (x, y)
 100      SCM x;
 101      SCM y;
 102 #endif
 103 {
 104   SCM_CHECK_STACK;
 105  tailrecurse: SCM_ASYNC_TICK;
 106         if (x==y) return SCM_BOOL_T;
 107         if (SCM_IMP(x)) return SCM_BOOL_F;
 108         if (SCM_IMP(y)) return SCM_BOOL_F;
 109         if (SCM_CONSP(x) && SCM_CONSP(y)) {
 110                 if SCM_FALSEP(scm_equal_p(SCM_CAR(x), SCM_CAR(y))) return SCM_BOOL_F;
 111                 x = SCM_CDR(x);
 112                 y = SCM_CDR(y);
 113                 goto tailrecurse;
 114         }
 115         /* this ensures that types and scm_length are the same. */
 116         if (SCM_CAR(x) != SCM_CAR(y)) return SCM_BOOL_F;
 117         switch (SCM_TYP7(x)) {
 118         default: return SCM_BOOL_F;
 119         case scm_tc7_substring:
 120         case scm_tc7_mb_substring:
 121         case scm_tc7_mb_string:
 122         case scm_tc7_string: return scm_string_equal_p(x, y);
 123         case scm_tc7_vector:
 124         case scm_tc7_wvect:
 125           return scm_vector_equal_p(x, y);
 126         case scm_tc7_smob: {
 127                 int i = SCM_SMOBNUM(x);
 128                 if (!(i < scm_numsmob)) return SCM_BOOL_F;
 129                 if (scm_smobs[i].equalp)
 130                   return (scm_smobs[i].equalp)(x, y);
 131                 else
 132                   return SCM_BOOL_F;
 133               }
 134         case scm_tc7_bvect: case scm_tc7_uvect: case scm_tc7_ivect:
 135         case scm_tc7_fvect:     case scm_tc7_cvect: case scm_tc7_dvect:
 136         case scm_tc7_svect:
 137 #ifdef LONGLONGS
 138         case scm_tc7_llvect:
 139 #endif
 140         case scm_tc7_byvect:
 141           if (   scm_tc16_array
 142               && scm_smobs[0x0ff & (scm_tc16_array >> 8)].equalp)
 143             return scm_array_equal_p(x, y);
 144         }
 145         return SCM_BOOL_F;
 146 }
 147
 148
 149 \f
 150
 151
 152 #ifdef __STDC__
 153 void
 154 scm_init_eq (void)
 155 #else
 156 void
 157 scm_init_eq ()
 158 #endif
 159 {
 160 #include "eq.x"
 161 }
 162