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Diffstat (limited to 'libguile/chars.h')
-rw-r--r-- | libguile/chars.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/libguile/chars.h b/libguile/chars.h new file mode 100644 index 000000000..e628b400a --- /dev/null +++ b/libguile/chars.h @@ -0,0 +1,95 @@ +#ifndef SCM_CHARS_H +#define SCM_CHARS_H + +/* Copyright 1995-1996,2000-2001,2004,2006,2008-2009,2018 + Free Software Foundation, Inc. + + This file is part of Guile. + + Guile is free software: you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Guile is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with Guile. If not, see + <https://www.gnu.org/licenses/>. */ + + + +#include <libguile/error.h> + + +/* Immediate Characters + */ +#define SCM_CHARP(x) (SCM_ITAG8(x) == scm_tc8_char) +#define SCM_CHAR(x) ((scm_t_wchar)SCM_ITAG8_DATA(x)) + +/* SCM_MAKE_CHAR maps signed chars (-128 to 127) and unsigned chars (0 + to 255) to Latin-1 codepoints (0 to 255) while allowing higher + codepoints (256 to 1114111) to pass through unchanged. + + This macro evaluates x twice, which may lead to side effects if not + used properly. */ +#define SCM_MAKE_CHAR(x) \ + ((x) <= 1 \ + ? SCM_MAKE_ITAG8 ((scm_t_bits) (unsigned char) (x), scm_tc8_char) \ + : SCM_MAKE_ITAG8 ((scm_t_bits) (x), scm_tc8_char)) + +#define SCM_CODEPOINT_DOTTED_CIRCLE (0x25cc) +#define SCM_CODEPOINT_SURROGATE_START (0xd800) +#define SCM_CODEPOINT_SURROGATE_END (0xdfff) +#define SCM_CODEPOINT_MAX (0x10ffff) +#define SCM_IS_UNICODE_CHAR(c) \ + (((scm_t_wchar) (c) >= 0 \ + && (scm_t_wchar) (c) < SCM_CODEPOINT_SURROGATE_START) \ + || ((scm_t_wchar) (c) > SCM_CODEPOINT_SURROGATE_END \ + && (scm_t_wchar) (c) <= SCM_CODEPOINT_MAX)) + +#define SCM_VALIDATE_CHAR(pos, scm) SCM_MAKE_VALIDATE_MSG (pos, scm, CHARP, "character") + +#define SCM_VALIDATE_CHAR_COPY(pos, scm, cvar) \ + do { \ + SCM_ASSERT (SCM_CHARP (scm), scm, pos, FUNC_NAME); \ + cvar = SCM_CHAR (scm); \ + } while (0) + + + +SCM_API SCM scm_char_p (SCM x); +SCM_API SCM scm_char_eq_p (SCM x, SCM y); +SCM_API SCM scm_char_less_p (SCM x, SCM y); +SCM_API SCM scm_char_leq_p (SCM x, SCM y); +SCM_API SCM scm_char_gr_p (SCM x, SCM y); +SCM_API SCM scm_char_geq_p (SCM x, SCM y); +SCM_API SCM scm_char_ci_eq_p (SCM x, SCM y); +SCM_API SCM scm_char_ci_less_p (SCM x, SCM y); +SCM_API SCM scm_char_ci_leq_p (SCM x, SCM y); +SCM_API SCM scm_char_ci_gr_p (SCM x, SCM y); +SCM_API SCM scm_char_ci_geq_p (SCM x, SCM y); +SCM_API SCM scm_char_alphabetic_p (SCM chr); +SCM_API SCM scm_char_numeric_p (SCM chr); +SCM_API SCM scm_char_whitespace_p (SCM chr); +SCM_API SCM scm_char_upper_case_p (SCM chr); +SCM_API SCM scm_char_lower_case_p (SCM chr); +SCM_API SCM scm_char_is_both_p (SCM chr); +SCM_API SCM scm_char_to_integer (SCM chr); +SCM_API SCM scm_integer_to_char (SCM n); +SCM_API SCM scm_char_upcase (SCM chr); +SCM_API SCM scm_char_downcase (SCM chr); +SCM_API SCM scm_char_titlecase (SCM chr); +SCM_API SCM scm_char_general_category (SCM chr); +SCM_API scm_t_wchar scm_c_upcase (scm_t_wchar c); +SCM_API scm_t_wchar scm_c_downcase (scm_t_wchar c); +SCM_API scm_t_wchar scm_c_titlecase (scm_t_wchar c); +SCM_INTERNAL const char *scm_i_charname (SCM chr); +SCM_INTERNAL SCM scm_i_charname_to_char (const char *charname, + size_t charname_len); +SCM_INTERNAL void scm_init_chars (void); + +#endif /* SCM_CHARS_H */ |