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744c8724a7
* libguile/chars.h (SCM_MAKE_CHAR): quiet signed/unsigned comparison warnings * libguile/chars.c (scm_i_charname): (scm_i_charname_to_char): quiet signed/unsigned comparison warnings
426 lines
12 KiB
C
426 lines
12 KiB
C
/* Copyright (C) 1995,1996,1998, 2000, 2001, 2004, 2006, 2008, 2009 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 <ctype.h>
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#include <limits.h>
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#include <unicase.h>
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#include "libguile/_scm.h"
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#include "libguile/validate.h"
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#include "libguile/chars.h"
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#include "libguile/srfi-14.h"
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SCM_DEFINE (scm_char_p, "char?", 1, 0, 0,
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(SCM x),
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"Return @code{#t} iff @var{x} is a character, else @code{#f}.")
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#define FUNC_NAME s_scm_char_p
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{
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return scm_from_bool (SCM_CHARP(x));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_char_eq_p, "char=?", scm_tc7_rpsubr,
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(SCM x, SCM y),
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"Return @code{#t} iff @var{x} is the same character as @var{y}, else @code{#f}.")
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#define FUNC_NAME s_scm_char_eq_p
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{
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SCM_VALIDATE_CHAR (1, x);
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SCM_VALIDATE_CHAR (2, y);
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return scm_from_bool (scm_is_eq (x, y));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_char_less_p, "char<?", scm_tc7_rpsubr,
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(SCM x, SCM y),
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"Return @code{#t} iff @var{x} is less than @var{y} in the Unicode sequence,\n"
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"else @code{#f}.")
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#define FUNC_NAME s_scm_char_less_p
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{
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SCM_VALIDATE_CHAR (1, x);
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SCM_VALIDATE_CHAR (2, y);
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return scm_from_bool (SCM_CHAR(x) < SCM_CHAR(y));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_char_leq_p, "char<=?", scm_tc7_rpsubr,
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(SCM x, SCM y),
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"Return @code{#t} iff @var{x} is less than or equal to @var{y} in the\n"
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"Unicode sequence, else @code{#f}.")
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#define FUNC_NAME s_scm_char_leq_p
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{
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SCM_VALIDATE_CHAR (1, x);
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SCM_VALIDATE_CHAR (2, y);
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return scm_from_bool (SCM_CHAR(x) <= SCM_CHAR(y));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_char_gr_p, "char>?", scm_tc7_rpsubr,
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(SCM x, SCM y),
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"Return @code{#t} iff @var{x} is greater than @var{y} in the Unicode\n"
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"sequence, else @code{#f}.")
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#define FUNC_NAME s_scm_char_gr_p
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{
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SCM_VALIDATE_CHAR (1, x);
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SCM_VALIDATE_CHAR (2, y);
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return scm_from_bool (SCM_CHAR(x) > SCM_CHAR(y));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_char_geq_p, "char>=?", scm_tc7_rpsubr,
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(SCM x, SCM y),
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"Return @code{#t} iff @var{x} is greater than or equal to @var{y} in the\n"
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"Unicode sequence, else @code{#f}.")
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#define FUNC_NAME s_scm_char_geq_p
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{
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SCM_VALIDATE_CHAR (1, x);
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SCM_VALIDATE_CHAR (2, y);
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return scm_from_bool (SCM_CHAR(x) >= SCM_CHAR(y));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_char_ci_eq_p, "char-ci=?", scm_tc7_rpsubr,
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(SCM x, SCM y),
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"Return @code{#t} iff @var{x} is the same character as @var{y} ignoring\n"
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"case, else @code{#f}. Case is locale free and not context sensitive.")
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#define FUNC_NAME s_scm_char_ci_eq_p
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{
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SCM_VALIDATE_CHAR (1, x);
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SCM_VALIDATE_CHAR (2, y);
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return scm_from_bool (scm_c_upcase(SCM_CHAR(x))==scm_c_upcase(SCM_CHAR(y)));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_char_ci_less_p, "char-ci<?", scm_tc7_rpsubr,
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(SCM x, SCM y),
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"Return @code{#t} iff the Unicode uppercase form of @var{x} is less\n"
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"than the Unicode uppercase form @var{y} in the Unicode sequence,\n"
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"else @code{#f}.")
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#define FUNC_NAME s_scm_char_ci_less_p
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{
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SCM_VALIDATE_CHAR (1, x);
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SCM_VALIDATE_CHAR (2, y);
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return scm_from_bool ((scm_c_upcase(SCM_CHAR(x))) < scm_c_upcase(SCM_CHAR(y)));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_char_ci_leq_p, "char-ci<=?", scm_tc7_rpsubr,
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(SCM x, SCM y),
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"Return @code{#t} iff the Unicode uppercase form of @var{x} is less\n"
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"than or equal to the Unicode uppercase form of @var{y} in the\n"
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"Unicode sequence, else @code{#f}.")
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#define FUNC_NAME s_scm_char_ci_leq_p
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{
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SCM_VALIDATE_CHAR (1, x);
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SCM_VALIDATE_CHAR (2, y);
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return scm_from_bool (scm_c_upcase(SCM_CHAR(x)) <= scm_c_upcase(SCM_CHAR(y)));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_char_ci_gr_p, "char-ci>?", scm_tc7_rpsubr,
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(SCM x, SCM y),
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"Return @code{#t} iff the Unicode uppercase form of @var{x} is greater\n"
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"than the Unicode uppercase form of @var{y} in the Unicode\n"
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"sequence, else @code{#f}.")
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#define FUNC_NAME s_scm_char_ci_gr_p
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{
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SCM_VALIDATE_CHAR (1, x);
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SCM_VALIDATE_CHAR (2, y);
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return scm_from_bool (scm_c_upcase(SCM_CHAR(x)) > scm_c_upcase(SCM_CHAR(y)));
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}
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#undef FUNC_NAME
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SCM_DEFINE1 (scm_char_ci_geq_p, "char-ci>=?", scm_tc7_rpsubr,
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(SCM x, SCM y),
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"Return @code{#t} iff the Unicode uppercase form of @var{x} is greater\n"
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"than or equal to the Unicode uppercase form of @var{y} in the\n"
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"Unicode sequence, else @code{#f}.")
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#define FUNC_NAME s_scm_char_ci_geq_p
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{
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SCM_VALIDATE_CHAR (1, x);
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SCM_VALIDATE_CHAR (2, y);
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return scm_from_bool (scm_c_upcase(SCM_CHAR(x)) >= scm_c_upcase(SCM_CHAR(y)));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_char_alphabetic_p, "char-alphabetic?", 1, 0, 0,
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(SCM chr),
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"Return @code{#t} iff @var{chr} is alphabetic, else @code{#f}.\n")
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#define FUNC_NAME s_scm_char_alphabetic_p
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{
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return scm_char_set_contains_p (scm_char_set_letter, chr);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_char_numeric_p, "char-numeric?", 1, 0, 0,
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(SCM chr),
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"Return @code{#t} iff @var{chr} is numeric, else @code{#f}.\n")
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#define FUNC_NAME s_scm_char_numeric_p
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{
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return scm_char_set_contains_p (scm_char_set_digit, chr);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_char_whitespace_p, "char-whitespace?", 1, 0, 0,
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(SCM chr),
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"Return @code{#t} iff @var{chr} is whitespace, else @code{#f}.\n")
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#define FUNC_NAME s_scm_char_whitespace_p
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{
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return scm_char_set_contains_p (scm_char_set_whitespace, chr);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_char_upper_case_p, "char-upper-case?", 1, 0, 0,
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(SCM chr),
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"Return @code{#t} iff @var{chr} is uppercase, else @code{#f}.\n")
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#define FUNC_NAME s_scm_char_upper_case_p
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{
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return scm_char_set_contains_p (scm_char_set_upper_case, chr);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_char_lower_case_p, "char-lower-case?", 1, 0, 0,
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(SCM chr),
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"Return @code{#t} iff @var{chr} is lowercase, else @code{#f}.\n")
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#define FUNC_NAME s_scm_char_lower_case_p
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{
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return scm_char_set_contains_p (scm_char_set_lower_case, chr);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_char_is_both_p, "char-is-both?", 1, 0, 0,
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(SCM chr),
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"Return @code{#t} iff @var{chr} is either uppercase or lowercase, else @code{#f}.\n")
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#define FUNC_NAME s_scm_char_is_both_p
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{
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if (scm_is_true (scm_char_set_contains_p (scm_char_set_lower_case, chr)))
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return SCM_BOOL_T;
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return scm_char_set_contains_p (scm_char_set_upper_case, chr);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_char_to_integer, "char->integer", 1, 0, 0,
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(SCM chr),
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"Return the number corresponding to ordinal position of @var{chr} in the\n"
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"ASCII sequence.")
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#define FUNC_NAME s_scm_char_to_integer
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{
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SCM_VALIDATE_CHAR (1, chr);
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return scm_from_uint32 (SCM_CHAR(chr));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_integer_to_char, "integer->char", 1, 0, 0,
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(SCM n),
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"Return the character at position @var{n} in the ASCII sequence.")
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#define FUNC_NAME s_scm_integer_to_char
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{
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scm_t_wchar cn;
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cn = scm_to_wchar (n);
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/* Avoid the surrogates. */
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if (!SCM_IS_UNICODE_CHAR (cn))
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scm_out_of_range (FUNC_NAME, n);
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return SCM_MAKE_CHAR (cn);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_char_upcase, "char-upcase", 1, 0, 0,
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(SCM chr),
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"Return the uppercase character version of @var{chr}.")
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#define FUNC_NAME s_scm_char_upcase
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{
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SCM_VALIDATE_CHAR (1, chr);
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return SCM_MAKE_CHAR (scm_c_upcase (SCM_CHAR (chr)));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_char_downcase, "char-downcase", 1, 0, 0,
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(SCM chr),
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"Return the lowercase character version of @var{chr}.")
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#define FUNC_NAME s_scm_char_downcase
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{
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SCM_VALIDATE_CHAR (1, chr);
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return SCM_MAKE_CHAR (scm_c_downcase (SCM_CHAR(chr)));
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}
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#undef FUNC_NAME
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/*
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TODO: change name to scm_i_.. ? --hwn
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*/
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scm_t_wchar
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scm_c_upcase (scm_t_wchar c)
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{
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if (c > 255)
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return c;
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return toupper ((int) c);
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}
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scm_t_wchar
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scm_c_downcase (scm_t_wchar c)
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{
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if (c > 255)
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return c;
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return tolower ((int) c);
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}
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/* There are a few sets of character names: R5RS, Guile
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extensions for control characters, and leftover Guile extensions.
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They are listed in order of precedence. */
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static const char *const scm_r5rs_charnames[] = {
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"space", "newline"
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};
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static const scm_t_uint32 const scm_r5rs_charnums[] = {
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0x20, 0x0A
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};
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#define SCM_N_R5RS_CHARNAMES (sizeof (scm_r5rs_charnames) / sizeof (char *))
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/* The abbreviated names for control characters. */
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static const char *const scm_C0_control_charnames[] = {
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/* C0 controls */
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"nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel",
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"bs", "ht", "lf", "vt", "ff", "cr", "so", "si",
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"dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb",
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"can", "em", "sub", "esc", "fs", "gs", "rs", "us",
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"sp", "del"
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};
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static const scm_t_uint32 const scm_C0_control_charnums[] = {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
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0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
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0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
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0x20, 0x7f
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};
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#define SCM_N_C0_CONTROL_CHARNAMES (sizeof (scm_C0_control_charnames) / sizeof (char *))
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static const char *const scm_alt_charnames[] = {
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"null", "backspace", "tab", "nl", "newline", "np", "page", "return",
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};
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static const scm_t_uint32 const scm_alt_charnums[] = {
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0x00, 0x08, 0x09, 0x0a, 0x0a, 0x0c, 0x0c, 0x0d
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};
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#define SCM_N_ALT_CHARNAMES (sizeof (scm_alt_charnames) / sizeof (char *))
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/* Returns the string charname for a character if it exists, or NULL
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otherwise. */
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const char *
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scm_i_charname (SCM chr)
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{
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size_t c;
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scm_t_uint32 i = SCM_CHAR (chr);
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for (c = 0; c < SCM_N_R5RS_CHARNAMES; c++)
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if (scm_r5rs_charnums[c] == i)
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return scm_r5rs_charnames[c];
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for (c = 0; c < SCM_N_C0_CONTROL_CHARNAMES; c++)
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if (scm_C0_control_charnums[c] == i)
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return scm_C0_control_charnames[c];
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for (c = 0; c < SCM_N_ALT_CHARNAMES; c++)
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if (scm_alt_charnums[c] == i)
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return scm_alt_charnames[i];
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return NULL;
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}
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/* Return a character from a string charname. */
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SCM
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scm_i_charname_to_char (const char *charname, size_t charname_len)
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{
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size_t c;
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/* The R5RS charnames. These are supposed to be case
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insensitive. */
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for (c = 0; c < SCM_N_R5RS_CHARNAMES; c++)
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if ((strlen (scm_r5rs_charnames[c]) == charname_len)
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&& (!strncasecmp (scm_r5rs_charnames[c], charname, charname_len)))
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return SCM_MAKE_CHAR (scm_r5rs_charnums[c]);
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/* Then come the controls. These are not case sensitive. */
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for (c = 0; c < SCM_N_C0_CONTROL_CHARNAMES; c++)
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if ((strlen (scm_C0_control_charnames[c]) == charname_len)
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&& (!strncasecmp (scm_C0_control_charnames[c], charname, charname_len)))
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return SCM_MAKE_CHAR (scm_C0_control_charnums[c]);
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/* Lastly are some old names carried over for compatibility. */
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for (c = 0; c < SCM_N_ALT_CHARNAMES; c++)
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if ((strlen (scm_alt_charnames[c]) == charname_len)
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&& (!strncasecmp (scm_alt_charnames[c], charname, charname_len)))
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return SCM_MAKE_CHAR (scm_alt_charnums[c]);
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return SCM_BOOL_F;
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}
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void
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scm_init_chars ()
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{
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#include "libguile/chars.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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