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210c0325d3
* libguile/tags.h (SCM_MAKE_ITAG8_BITS): New helper, produces a scm_t_bits instead of a SCM, because SCM_UNPACK is not a constant expression with SCM_DEBUG_TYPING_STRICTNESS==2. (SCM_MAKIFLAG_BITS): Remove SCM_MAKIFLAG, and replace with this, which returns bits. (SCM_BOOL_F_BITS, SCM_ELISP_NIL_BITS, SCM_EOL_BITS, SCM_BOOL_T_BITS): (SCM_UNSPECIFIED_BITS, SCM_UNDEFINED_BITS, SCM_EOF_VAL_BITS): (SCM_UNBOUND_BITS): New definitions. Defined SCM_BOOL_F, etc in terms of them. (SCM_XXX_ANOTHER_BOOLEAN_DONT_USE_0): (SCM_XXX_ANOTHER_BOOLEAN_DONT_USE_1): (SCM_XXX_ANOTHER_BOOLEAN_DONT_USE_2): (SCM_XXX_ANOTHER_LISP_FALSE_DONT_USE): Be bits instead of SCM values. (SCM_BITS_DIFFER_IN_EXACTLY_ONE_BIT_POSITION): (SCM_BITS_DIFFER_IN_EXACTLY_TWO_BIT_POSITIONS): Rename from SCM_VALUES_DIFFER_..., and take unpacked bits as the args. * libguile/boolean.c: Update verify block to use SCM_BITS_DIFFER_IN_EXACTLY_TWO_BIT_POSITIONS et al. * libguile/debug.c (scm_debug_opts): * libguile/print.c (scm_print_opts): * libguile/read.c (scm_read_opts): Use iflags bits for initializers. * libguile/hash.c (scm_hasher): Use _BITS for iflags as case labels. * libguile/pairs.c: Nil/null compile-time check uses SCM_ELISP_NIL_BITS.
109 lines
3 KiB
C
109 lines
3 KiB
C
/* Copyright (C) 1995, 1996, 2000, 2001, 2006, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "libguile/_scm.h"
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#include "libguile/validate.h"
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#include "libguile/boolean.h"
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#include "libguile/tags.h"
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#include "verify.h"
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/*
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* These compile-time tests verify the properties needed for the
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* efficient test macros defined in boolean.h, which are defined in
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* terms of the SCM_MATCHES_BITS_IN_COMMON macro.
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*
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* See the comments preceeding the definitions of SCM_BOOL_F and
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* SCM_MATCHES_BITS_IN_COMMON in tags.h for more information.
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*/
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verify (SCM_BITS_DIFFER_IN_EXACTLY_ONE_BIT_POSITION \
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(SCM_BOOL_F_BITS, SCM_BOOL_T_BITS));
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verify (SCM_BITS_DIFFER_IN_EXACTLY_ONE_BIT_POSITION \
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(SCM_ELISP_NIL_BITS, SCM_BOOL_F_BITS));
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verify (SCM_BITS_DIFFER_IN_EXACTLY_ONE_BIT_POSITION \
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(SCM_ELISP_NIL_BITS, SCM_EOL_BITS));
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verify (SCM_BITS_DIFFER_IN_EXACTLY_TWO_BIT_POSITIONS \
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(SCM_ELISP_NIL_BITS, SCM_BOOL_F_BITS, SCM_BOOL_T_BITS, \
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SCM_XXX_ANOTHER_BOOLEAN_DONT_USE_0));
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verify (SCM_BITS_DIFFER_IN_EXACTLY_TWO_BIT_POSITIONS \
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(SCM_ELISP_NIL_BITS, SCM_BOOL_F_BITS, SCM_EOL_BITS, \
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SCM_XXX_ANOTHER_LISP_FALSE_DONT_USE));
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SCM_DEFINE (scm_not, "not", 1, 0, 0,
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(SCM x),
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"Return @code{#t} iff @var{x} is false, else return @code{#f}.")
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#define FUNC_NAME s_scm_not
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{
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return scm_from_bool (scm_is_false (x));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_boolean_p, "boolean?", 1, 0, 0,
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(SCM obj),
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"Return @code{#t} iff @var{obj} is @code{#t} or false.")
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#define FUNC_NAME s_scm_boolean_p
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{
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return scm_from_bool (scm_is_bool (obj));
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}
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#undef FUNC_NAME
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int
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scm_to_bool (SCM x)
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{
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if (scm_is_false (x))
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return 0;
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else if (scm_is_eq (x, SCM_BOOL_T))
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return 1;
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else
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scm_wrong_type_arg (NULL, 0, x);
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}
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/* We keep this primitive as a function in addition to the same-named macro
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because some applications (e.g., GNU LilyPond 2.13.9) expect it to be a
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function. */
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#undef scm_is_bool
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int
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scm_is_bool (SCM obj)
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{
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/* This must match the macro definition of `scm_is_bool ()'. */
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return scm_is_bool_or_nil (obj);
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}
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void
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scm_init_boolean ()
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{
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#include "libguile/boolean.x"
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}
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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