-/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,1997,1998,2000,2001, 2003 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307 USA
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of GUILE.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice.
- */
+ * If you do not wish that, delete this exception notice. */
+
+\f
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "libguile/_scm.h"
+#include "libguile/ramap.h"
+#include "libguile/stackchk.h"
+#include "libguile/strorder.h"
+#include "libguile/async.h"
+#include "libguile/root.h"
+#include "libguile/smob.h"
+#include "libguile/unif.h"
+#include "libguile/vectors.h"
+
+#include "libguile/validate.h"
+#include "libguile/eq.h"
\f
-#include <stdio.h>
-#include "_scm.h"
-#include "ramap.h"
-#include "stackchk.h"
-#include "strorder.h"
-#include "smob.h"
-#include "unif.h"
-
-#include "eq.h"
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
\f
-SCM_PROC1 (s_eq_p, "eq?", scm_tc7_rpsubr, scm_eq_p);
-SCM
-scm_eq_p (x, y)
- SCM x;
- SCM y;
+SCM_DEFINE1 (scm_eq_p, "eq?", scm_tc7_rpsubr,
+ (SCM x, SCM y),
+ "Return @code{#t} iff @var{x} references the same object as @var{y}.\n"
+ "@code{eq?} is similar to @code{eqv?} except that in some cases it is\n"
+ "capable of discerning distinctions finer than those detectable by\n"
+ "@code{eqv?}.")
+#define FUNC_NAME s_scm_eq_p
{
- return ((x==y)
- ? SCM_BOOL_T
- : SCM_BOOL_F);
+ return SCM_BOOL (SCM_EQ_P (x, y));
}
+#undef FUNC_NAME
+/* We compare doubles in a special way for 'eqv?' to be able to
+ distinguish plus and minus zero and to identify NaNs.
+*/
-SCM_PROC1 (s_eqv_p, "eqv?", scm_tc7_rpsubr, scm_eqv_p);
+static int
+real_eqv (double x, double y)
+{
+ return !memcmp (&x, &y, sizeof(double));
+}
-SCM
-scm_eqv_p (x, y)
- SCM x;
- SCM y;
+SCM_DEFINE1 (scm_eqv_p, "eqv?", scm_tc7_rpsubr,
+ (SCM x, SCM y),
+ "The @code{eqv?} procedure defines a useful equivalence relation on objects.\n"
+ "Briefly, it returns @code{#t} if @var{x} and @var{y} should normally be\n"
+ "regarded as the same object. This relation is left slightly open to\n"
+ "interpretation, but works for comparing immediate integers, characters,\n"
+ "and inexact numbers.")
+#define FUNC_NAME s_scm_eqv_p
{
- if (x==y) return SCM_BOOL_T;
- if SCM_IMP(x) return SCM_BOOL_F;
- if SCM_IMP(y) return SCM_BOOL_F;
- /* this ensures that types and scm_length are the same. */
- if (SCM_CAR(x) != SCM_CAR(y)) return SCM_BOOL_F;
- if SCM_NUMP(x) {
-# ifdef SCM_BIGDIG
- if SCM_BIGP(x) return (0==scm_bigcomp(x, y)) ? SCM_BOOL_T : SCM_BOOL_F;
-# endif
-#ifdef SCM_FLOATS
- if (SCM_REALPART(x) != SCM_REALPART(y)) return SCM_BOOL_F;
- if (SCM_CPLXP(x) && (SCM_IMAG(x) != SCM_IMAG(y))) return SCM_BOOL_F;
-#endif
+ if (SCM_EQ_P (x, y))
return SCM_BOOL_T;
- }
+ if (SCM_IMP (x))
+ return SCM_BOOL_F;
+ if (SCM_IMP (y))
+ return SCM_BOOL_F;
+ /* this ensures that types and scm_length are the same. */
+ if (SCM_CELL_TYPE (x) != SCM_CELL_TYPE (y))
+ {
+ /* treat mixes of real and complex types specially */
+ if (SCM_SLOPPY_INEXACTP (x))
+ {
+ if (SCM_SLOPPY_REALP (x))
+ return SCM_BOOL (SCM_SLOPPY_COMPLEXP (y)
+ && real_eqv (SCM_REAL_VALUE (x),
+ SCM_COMPLEX_REAL (y))
+ && 0.0 == SCM_COMPLEX_IMAG (y));
+ else
+ return SCM_BOOL (SCM_SLOPPY_REALP (y)
+ && real_eqv (SCM_COMPLEX_REAL (x),
+ SCM_REAL_VALUE (y))
+ && SCM_COMPLEX_IMAG (x) == 0.0);
+ }
+ return SCM_BOOL_F;
+ }
+ if (SCM_NUMP (x))
+ {
+ if (SCM_BIGP (x)) {
+ return SCM_BOOL (0 == scm_i_bigcmp (x, y));
+ } else if (SCM_SLOPPY_REALP (x)) {
+ return SCM_BOOL (real_eqv (SCM_REAL_VALUE (x), SCM_REAL_VALUE (y)));
+ } else { /* complex */
+ return SCM_BOOL (real_eqv (SCM_COMPLEX_REAL (x),
+ SCM_COMPLEX_REAL (y))
+ && real_eqv (SCM_COMPLEX_IMAG (x),
+ SCM_COMPLEX_IMAG (y)));
+ }
+ }
return SCM_BOOL_F;
}
+#undef FUNC_NAME
-SCM_PROC1 (s_equal_p, "equal?", scm_tc7_rpsubr, scm_equal_p);
-
-SCM
-scm_equal_p (x, y)
- SCM x;
- SCM y;
+SCM_PRIMITIVE_GENERIC_1 (scm_equal_p, "equal?", scm_tc7_rpsubr,
+ (SCM x, SCM y),
+ "Return @code{#t} iff @var{x} and @var{y} are recursively @code{eqv?} equivalent.\n"
+ "@code{equal?} recursively compares the contents of pairs,\n"
+ "vectors, and strings, applying @code{eqv?} on other objects such as\n"
+ "numbers and symbols. A rule of thumb is that objects are generally\n"
+ "@code{equal?} if they print the same. @code{equal?} may fail to\n"
+ "terminate if its arguments are circular data structures.")
+#define FUNC_NAME s_scm_equal_p
{
SCM_CHECK_STACK;
- tailrecurse: SCM_ASYNC_TICK;
- if (x==y) return SCM_BOOL_T;
- if (SCM_IMP(x)) return SCM_BOOL_F;
- if (SCM_IMP(y)) return SCM_BOOL_F;
- if (SCM_CONSP(x) && SCM_CONSP(y)) {
- if SCM_FALSEP(scm_equal_p(SCM_CAR(x), SCM_CAR(y))) return SCM_BOOL_F;
- x = SCM_CDR(x);
- y = SCM_CDR(y);
- goto tailrecurse;
+ tailrecurse:
+ SCM_TICK;
+ if (SCM_EQ_P (x, y))
+ return SCM_BOOL_T;
+ if (SCM_IMP (x))
+ return SCM_BOOL_F;
+ if (SCM_IMP (y))
+ return SCM_BOOL_F;
+ if (SCM_CONSP (x) && SCM_CONSP (y))
+ {
+ if (SCM_FALSEP (scm_equal_p (SCM_CAR (x), SCM_CAR (y))))
+ return SCM_BOOL_F;
+ x = SCM_CDR(x);
+ y = SCM_CDR(y);
+ goto tailrecurse;
+ }
+ if (SCM_TYP7S (x) == scm_tc7_string && SCM_TYP7S (y) == scm_tc7_string)
+ return scm_string_equal_p (x, y);
+ /* This ensures that types and scm_length are the same. */
+ if (SCM_CELL_TYPE (x) != SCM_CELL_TYPE (y))
+ {
+ /* treat mixes of real and complex types specially */
+ if (SCM_SLOPPY_INEXACTP (x))
+ {
+ if (SCM_SLOPPY_REALP (x))
+ return SCM_BOOL (SCM_SLOPPY_COMPLEXP (y)
+ && SCM_REAL_VALUE (x) == SCM_COMPLEX_REAL (y)
+ && 0.0 == SCM_COMPLEX_IMAG (y));
+ else
+ return SCM_BOOL (SCM_SLOPPY_REALP (y)
+ && SCM_COMPLEX_REAL (x) == SCM_REAL_VALUE (y)
+ && SCM_COMPLEX_IMAG (x) == 0.0);
}
- if (SCM_TYP7SD (x) == scm_tc7_string
- && SCM_TYP7SD (y) == scm_tc7_string)
- return scm_string_equal_p (x, y);
- /* This ensures that types and scm_length are the same. */
- if (SCM_CAR(x) != SCM_CAR(y)) return SCM_BOOL_F;
- switch (SCM_TYP7(x)) {
- default: return SCM_BOOL_F;
- case scm_tc7_vector:
- case scm_tc7_wvect:
- return scm_vector_equal_p(x, y);
- case scm_tc7_smob: {
- int i = SCM_SMOBNUM(x);
- if (!(i < scm_numsmob)) return SCM_BOOL_F;
- if (scm_smobs[i].equalp)
- return (scm_smobs[i].equalp)(x, y);
- else
- return SCM_BOOL_F;
- }
- case scm_tc7_bvect: case scm_tc7_uvect: case scm_tc7_ivect:
- case scm_tc7_fvect: case scm_tc7_cvect: case scm_tc7_dvect:
- case scm_tc7_svect:
-#ifdef LONGLONGS
- case scm_tc7_llvect:
+ return SCM_BOOL_F;
+ }
+ switch (SCM_TYP7 (x))
+ {
+ default:
+ break;
+ case scm_tc7_vector:
+ case scm_tc7_wvect:
+ return scm_vector_equal_p (x, y);
+ case scm_tc7_smob:
+ {
+ int i = SCM_SMOBNUM (x);
+ if (!(i < scm_numsmob))
+ return SCM_BOOL_F;
+ if (scm_smobs[i].equalp)
+ return (scm_smobs[i].equalp) (x, y);
+ else
+ break;
+ }
+#if SCM_HAVE_ARRAYS
+ case scm_tc7_bvect: case scm_tc7_uvect: case scm_tc7_ivect:
+ case scm_tc7_fvect: case scm_tc7_cvect: case scm_tc7_dvect:
+ case scm_tc7_svect:
+#if SCM_SIZEOF_LONG_LONG != 0
+ case scm_tc7_llvect:
#endif
- case scm_tc7_byvect:
- if ( scm_tc16_array
- && scm_smobs[0x0ff & (scm_tc16_array >> 8)].equalp)
- return scm_array_equal_p(x, y);
- }
- return SCM_BOOL_F;
+ case scm_tc7_byvect:
+ if (scm_tc16_array && scm_smobs[SCM_TC2SMOBNUM (scm_tc16_array)].equalp)
+ return scm_array_equal_p (x, y);
+#endif
+ }
+ if (SCM_UNPACK (g_scm_equal_p))
+ return scm_call_generic_2 (g_scm_equal_p, x, y);
+ else
+ return SCM_BOOL_F;
}
+#undef FUNC_NAME
\f
void
scm_init_eq ()
{
-#include "eq.x"
+#include "libguile/eq.x"
}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff