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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.
280 lines
7.6 KiB
C
280 lines
7.6 KiB
C
/* Copyright (C) 1995,1996,2000,2001, 2004, 2005, 2006, 2008, 2009, 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/pairs.h"
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#include "verify.h"
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/* {Pairs}
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*/
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/*
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* This compile-time test verifies the properties needed for the
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* efficient test macro scm_is_null_or_nil defined in pairs.h,
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* which is defined in 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_ELISP_NIL_BITS, SCM_EOL_BITS));
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#if (SCM_DEBUG_PAIR_ACCESSES == 1)
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#include "libguile/ports.h"
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#include "libguile/strings.h"
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void scm_error_pair_access (SCM non_pair)
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{
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static unsigned int running = 0;
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SCM message = scm_from_locale_string ("Non-pair accessed with SCM_C[AD]R: `~S'\n");
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if (!running)
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{
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running = 1;
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scm_simple_format (scm_current_error_port (),
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message, scm_list_1 (non_pair));
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abort ();
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}
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}
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#endif
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SCM_DEFINE (scm_cons, "cons", 2, 0, 0,
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(SCM x, SCM y),
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"Return a newly allocated pair whose car is @var{x} and whose\n"
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"cdr is @var{y}. The pair is guaranteed to be different (in the\n"
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"sense of @code{eq?}) from every previously existing object.")
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#define FUNC_NAME s_scm_cons
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{
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return scm_cell (SCM_UNPACK (x), SCM_UNPACK (y));
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}
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#undef FUNC_NAME
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SCM
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scm_cons2 (SCM w, SCM x, SCM y)
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{
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return scm_cons (w, scm_cons (x, y));
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}
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SCM_DEFINE (scm_pair_p, "pair?", 1, 0, 0,
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(SCM x),
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"Return @code{#t} if @var{x} is a pair; otherwise return\n"
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"@code{#f}.")
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#define FUNC_NAME s_scm_pair_p
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{
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return scm_from_bool (scm_is_pair (x));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_set_car_x, "set-car!", 2, 0, 0,
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(SCM pair, SCM value),
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"Stores @var{value} in the car field of @var{pair}. The value returned\n"
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"by @code{set-car!} is unspecified.")
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#define FUNC_NAME s_scm_set_car_x
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{
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SCM_VALIDATE_CONS (1, pair);
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SCM_SETCAR (pair, value);
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return SCM_UNSPECIFIED;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_set_cdr_x, "set-cdr!", 2, 0, 0,
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(SCM pair, SCM value),
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"Stores @var{value} in the cdr field of @var{pair}. The value returned\n"
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"by @code{set-cdr!} is unspecified.")
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#define FUNC_NAME s_scm_set_cdr_x
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{
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SCM_VALIDATE_CONS (1, pair);
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SCM_SETCDR (pair, value);
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return SCM_UNSPECIFIED;
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}
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#undef FUNC_NAME
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/* Every cxr-pattern is made up of pairs of bits, starting with the two least
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* significant bits. If in a pair of bits the least significant of the two
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* bits is 0, this means CDR, otherwise CAR. The most significant bits of the
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* two bits is only needed to indicate when cxr-ing is ready. This is the
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* case, when all remaining pairs of bits equal 00. */
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/* The compiler should unroll this. */
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#define CHASE_PAIRS(tree, FUNC_NAME, pattern) \
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scm_t_uint32 pattern_var = pattern; \
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do \
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{ \
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if (!scm_is_pair (tree)) \
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scm_wrong_type_arg_msg (FUNC_NAME, 0, tree, "pair"); \
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tree = (pattern_var & 1) ? SCM_CAR (tree) : SCM_CDR (tree); \
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pattern_var >>= 2; \
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} \
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while (pattern_var); \
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return tree
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SCM_DEFINE (scm_cdr, "cdr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cdr", 0x02); /* 00000010 */
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}
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SCM_DEFINE (scm_car, "car", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "car", 0x03); /* 00000011 */
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}
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SCM_DEFINE (scm_cddr, "cddr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cddr", 0x0a); /* 00001010 */
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}
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SCM_DEFINE (scm_cdar, "cdar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cdar", 0x0b); /* 00001011 */
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}
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SCM_DEFINE (scm_cadr, "cadr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cadr", 0x0e); /* 00001110 */
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}
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SCM_DEFINE (scm_caar, "caar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "caar", 0x0f); /* 00001111 */
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}
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SCM_DEFINE (scm_cdddr, "cdddr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cdddr", 0x2a); /* 00101010 */
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}
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SCM_DEFINE (scm_cddar, "cddar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cddar", 0x2b); /* 00101011 */
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}
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SCM_DEFINE (scm_cdadr, "cdadr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cdadr", 0x2e); /* 00101110 */
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}
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SCM_DEFINE (scm_cdaar, "cdaar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cdaar", 0x2f); /* 00101111 */
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}
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SCM_DEFINE (scm_caddr, "caddr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "caddr", 0x3a); /* 00111010 */
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}
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SCM_DEFINE (scm_cadar, "cadar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cadar", 0x3b); /* 00111011 */
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}
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SCM_DEFINE (scm_caadr, "caadr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "caadr", 0x3e); /* 00111110 */
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}
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SCM_DEFINE (scm_caaar, "caaar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "caaar", 0x3f); /* 00111111 */
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}
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SCM_DEFINE (scm_cddddr, "cddddr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cddddr", 0xaa); /* 10101010 */
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}
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SCM_DEFINE (scm_cdddar, "cdddar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cdddar", 0xab); /* 10101011 */
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}
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SCM_DEFINE (scm_cddadr, "cddadr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cddadr", 0xae); /* 10101110 */
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}
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SCM_DEFINE (scm_cddaar, "cddaar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cddaar", 0xaf); /* 10101111 */
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}
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SCM_DEFINE (scm_cdaddr, "cdaddr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cdaddr", 0xba); /* 10111010 */
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}
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SCM_DEFINE (scm_cdadar, "cdadar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cdadar", 0xbb); /* 10111011 */
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}
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SCM_DEFINE (scm_cdaadr, "cdaadr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cdaadr", 0xbe); /* 10111110 */
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}
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SCM_DEFINE (scm_cdaaar, "cdaaar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cdaaar", 0xbf); /* 10111111 */
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}
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SCM_DEFINE (scm_cadddr, "cadddr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cadddr", 0xea); /* 11101010 */
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}
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SCM_DEFINE (scm_caddar, "caddar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "caddar", 0xeb); /* 11101011 */
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}
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SCM_DEFINE (scm_cadadr, "cadadr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cadadr", 0xee); /* 11101110 */
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}
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SCM_DEFINE (scm_cadaar, "cadaar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "cadaar", 0xef); /* 11101111 */
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}
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SCM_DEFINE (scm_caaddr, "caaddr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "caaddr", 0xfa); /* 11111010 */
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}
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SCM_DEFINE (scm_caadar, "caadar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "caadar", 0xfb); /* 11111011 */
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}
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SCM_DEFINE (scm_caaadr, "caaadr", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "caaadr", 0xfe); /* 11111110 */
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}
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SCM_DEFINE (scm_caaaar, "caaaar", 1, 0, 0, (SCM x), "")
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{
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CHASE_PAIRS (x, "caaaar", 0xff); /* 11111111 */
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}
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void
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scm_init_pairs ()
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{
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#include "libguile/pairs.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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