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0dcd7e6153
Since combining characters, such as accents, modify the appearance of the previous letter, it looks awkward in its character literal form (#\name) since it modified the backslash. This instead prints the combining character on a small circle. * libguile/chars.h (SCM_CODEPOINT_DOTTED_CIRCLE): new #define * libguile/print.c (iprint1): print combining characters on dotted circles * libguile/read.c (scm_read_character): parse the combination of combining characters and dotted circles
96 lines
3.5 KiB
C
96 lines
3.5 KiB
C
/* classes: h_files */
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#ifndef SCM_CHARS_H
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#define SCM_CHARS_H
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/* Copyright (C) 1995,1996,2000,2001,2004, 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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#include "libguile/__scm.h"
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#ifndef SCM_T_WCHAR_DEFINED
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typedef scm_t_int32 scm_t_wchar;
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#define SCM_T_WCHAR_DEFINED
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#endif /* SCM_T_WCHAR_DEFINED */
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/* Immediate Characters
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*/
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#define SCM_CHARP(x) (SCM_ITAG8(x) == scm_tc8_char)
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#define SCM_CHAR(x) ((scm_t_wchar)SCM_ITAG8_DATA(x))
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/* SCM_MAKE_CHAR maps signed chars (-128 to 127) and unsigned chars (0
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to 255) to Latin-1 codepoints (0 to 255) while allowing higher
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codepoints (256 to 1114111) to pass through unchanged.
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This macro evaluates x twice, which may lead to side effects if not
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used properly. */
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#define SCM_MAKE_CHAR(x) \
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((x) <= 1 \
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? SCM_MAKE_ITAG8 ((scm_t_bits) (unsigned char) (x), scm_tc8_char) \
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: SCM_MAKE_ITAG8 ((scm_t_bits) (x), scm_tc8_char))
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#define SCM_CODEPOINT_DOTTED_CIRCLE (0x25cc)
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#define SCM_CODEPOINT_SURROGATE_START (0xd800)
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#define SCM_CODEPOINT_SURROGATE_END (0xdfff)
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#define SCM_CODEPOINT_MAX (0x10ffff)
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#define SCM_IS_UNICODE_CHAR(c) \
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(((scm_t_wchar) (c) >= 0 \
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&& (scm_t_wchar) (c) < SCM_CODEPOINT_SURROGATE_START) \
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|| ((scm_t_wchar) (c) > SCM_CODEPOINT_SURROGATE_END \
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&& (scm_t_wchar) (c) <= SCM_CODEPOINT_MAX))
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SCM_API SCM scm_char_p (SCM x);
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SCM_API SCM scm_char_eq_p (SCM x, SCM y);
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SCM_API SCM scm_char_less_p (SCM x, SCM y);
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SCM_API SCM scm_char_leq_p (SCM x, SCM y);
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SCM_API SCM scm_char_gr_p (SCM x, SCM y);
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SCM_API SCM scm_char_geq_p (SCM x, SCM y);
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SCM_API SCM scm_char_ci_eq_p (SCM x, SCM y);
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SCM_API SCM scm_char_ci_less_p (SCM x, SCM y);
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SCM_API SCM scm_char_ci_leq_p (SCM x, SCM y);
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SCM_API SCM scm_char_ci_gr_p (SCM x, SCM y);
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SCM_API SCM scm_char_ci_geq_p (SCM x, SCM y);
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SCM_API SCM scm_char_alphabetic_p (SCM chr);
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SCM_API SCM scm_char_numeric_p (SCM chr);
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SCM_API SCM scm_char_whitespace_p (SCM chr);
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SCM_API SCM scm_char_upper_case_p (SCM chr);
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SCM_API SCM scm_char_lower_case_p (SCM chr);
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SCM_API SCM scm_char_is_both_p (SCM chr);
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SCM_API SCM scm_char_to_integer (SCM chr);
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SCM_API SCM scm_integer_to_char (SCM n);
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SCM_API SCM scm_char_upcase (SCM chr);
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SCM_API SCM scm_char_downcase (SCM chr);
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SCM_API scm_t_wchar scm_c_upcase (scm_t_wchar c);
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SCM_API scm_t_wchar scm_c_downcase (scm_t_wchar c);
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SCM_INTERNAL const char *scm_i_charname (SCM chr);
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SCM_INTERNAL SCM scm_i_charname_to_char (const char *charname,
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size_t charname_len);
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SCM_INTERNAL void scm_init_chars (void);
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#endif /* SCM_CHARS_H */
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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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