1 /* rlmbutil.h -- utility functions for multibyte characters. */
3 /* Copyright (C) 2001-2015 Free Software Foundation, Inc.
5 This file is part of the GNU Readline Library (Readline), a library
6 for reading lines of text with interactive input and history editing.
8 Readline is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 Readline is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with Readline. If not, see <http://www.gnu.org/licenses/>.
22 #if !defined (_RL_MBUTIL_H_)
27 /************************************************/
28 /* check multibyte capability for I18N code */
29 /************************************************/
31 /* For platforms which support the ISO C amendement 1 functionality we
32 support user defined character classes. */
33 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */
34 #if defined (HAVE_WCTYPE_H) && defined (HAVE_WCHAR_H) && defined (HAVE_LOCALE_H)
37 # if defined (HAVE_ISWCTYPE) && \
38 defined (HAVE_ISWLOWER) && \
39 defined (HAVE_ISWUPPER) && \
40 defined (HAVE_MBSRTOWCS) && \
41 defined (HAVE_MBRTOWC) && \
42 defined (HAVE_MBRLEN) && \
43 defined (HAVE_TOWLOWER) && \
44 defined (HAVE_TOWUPPER) && \
45 defined (HAVE_WCHAR_T) && \
46 defined (HAVE_WCWIDTH)
47 /* system is supposed to support XPG5 */
48 # define HANDLE_MULTIBYTE 1
52 /* If we don't want multibyte chars even on a system that supports them, let
53 the configuring user turn multibyte support off. */
54 #if defined (NO_MULTIBYTE_SUPPORT)
55 # undef HANDLE_MULTIBYTE
58 /* Some systems, like BeOS, have multibyte encodings but lack mbstate_t. */
59 #if HANDLE_MULTIBYTE && !defined (HAVE_MBSTATE_T)
60 # define wcsrtombs(dest, src, len, ps) (wcsrtombs) (dest, src, len, 0)
61 # define mbsrtowcs(dest, src, len, ps) (mbsrtowcs) (dest, src, len, 0)
62 # define wcrtomb(s, wc, ps) (wcrtomb) (s, wc, 0)
63 # define mbrtowc(pwc, s, n, ps) (mbrtowc) (pwc, s, n, 0)
64 # define mbrlen(s, n, ps) (mbrlen) (s, n, 0)
65 # define mbstate_t int
68 /* Make sure MB_LEN_MAX is at least 16 on systems that claim to be able to
69 handle multibyte chars (some systems define MB_LEN_MAX as 1) */
70 #ifdef HANDLE_MULTIBYTE
72 # if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16)
75 # if !defined (MB_LEN_MAX)
76 # define MB_LEN_MAX 16
80 /************************************************/
81 /* end of multibyte capability checks for I18N */
82 /************************************************/
85 * Flags for _rl_find_prev_mbchar and _rl_find_next_mbchar:
87 * MB_FIND_ANY find any multibyte character
88 * MB_FIND_NONZERO find a non-zero-width multibyte character
91 #define MB_FIND_ANY 0x00
92 #define MB_FIND_NONZERO 0x01
94 extern int _rl_find_prev_mbchar PARAMS((char *, int, int));
95 extern int _rl_find_next_mbchar PARAMS((char *, int, int, int));
97 #ifdef HANDLE_MULTIBYTE
99 extern int _rl_compare_chars PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *));
100 extern int _rl_get_char_len PARAMS((char *, mbstate_t *));
101 extern int _rl_adjust_point PARAMS((char *, int, mbstate_t *));
103 extern int _rl_read_mbchar PARAMS((char *, int));
104 extern int _rl_read_mbstring PARAMS((int, char *, int));
106 extern int _rl_is_mbchar_matched PARAMS((char *, int, int, char *, int));
108 extern wchar_t _rl_char_value PARAMS((char *, int));
109 extern int _rl_walphabetic PARAMS((wchar_t));
111 #define _rl_to_wupper(wc) (iswlower (wc) ? towupper (wc) : (wc))
112 #define _rl_to_wlower(wc) (iswupper (wc) ? towlower (wc) : (wc))
114 #define MB_NEXTCHAR(b,s,c,f) \
115 ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \
116 ? _rl_find_next_mbchar ((b), (s), (c), (f)) \
118 #define MB_PREVCHAR(b,s,f) \
119 ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \
120 ? _rl_find_prev_mbchar ((b), (s), (f)) \
123 #define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2)
124 #define MB_NULLWCH(x) ((x) == 0)
126 /* Try and shortcut the printable ascii characters to cut down the number of
127 calls to a libc wcwidth() */
134 case ' ': case '!': case '"': case '#': case '%':
135 case '&': case '\'': case '(': case ')': case '*':
136 case '+': case ',': case '-': case '.': case '/':
137 case '0': case '1': case '2': case '3': case '4':
138 case '5': case '6': case '7': case '8': case '9':
139 case ':': case ';': case '<': case '=': case '>':
141 case 'A': case 'B': case 'C': case 'D': case 'E':
142 case 'F': case 'G': case 'H': case 'I': case 'J':
143 case 'K': case 'L': case 'M': case 'N': case 'O':
144 case 'P': case 'Q': case 'R': case 'S': case 'T':
145 case 'U': case 'V': case 'W': case 'X': case 'Y':
147 case '[': case '\\': case ']': case '^': case '_':
148 case 'a': case 'b': case 'c': case 'd': case 'e':
149 case 'f': case 'g': case 'h': case 'i': case 'j':
150 case 'k': case 'l': case 'm': case 'n': case 'o':
151 case 'p': case 'q': case 'r': case 's': case 't':
152 case 'u': case 'v': case 'w': case 'x': case 'y':
153 case 'z': case '{': case '|': case '}': case '~':
160 /* Unicode combining characters range from U+0300 to U+036F */
161 #define UNICODE_COMBINING_CHAR(x) ((x) >= 768 && (x) <= 879)
163 #if defined (WCWIDTH_BROKEN)
164 # define WCWIDTH(wc) ((_rl_utf8locale && UNICODE_COMBINING_CHAR(wc)) ? 0 : _rl_wcwidth(wc))
166 # define WCWIDTH(wc) _rl_wcwidth(wc)
169 #if defined (WCWIDTH_BROKEN)
170 # define IS_COMBINING_CHAR(x) (WCWIDTH(x) == 0 && iswcntrl(x) == 0)
172 # define IS_COMBINING_CHAR(x) (WCWIDTH(x) == 0)
175 #define UTF8_SINGLEBYTE(c) (((c) & 0x80) == 0)
176 #define UTF8_MBFIRSTCHAR(c) (((c) & 0xc0) == 0xc0)
177 #define UTF8_MBCHAR(c) (((c) & 0xc0) == 0x80)
179 #else /* !HANDLE_MULTIBYTE */
187 #define _rl_find_prev_mbchar(b, i, f) (((i) == 0) ? (i) : ((i) - 1))
188 #define _rl_find_next_mbchar(b, i1, i2, f) ((i1) + (i2))
190 #define _rl_char_value(buf,ind) ((buf)[(ind)])
192 #define _rl_walphabetic(c) (rl_alphabetic (c))
194 #define _rl_to_wupper(c) (_rl_to_upper (c))
195 #define _rl_to_wlower(c) (_rl_to_lower (c))
197 #define MB_NEXTCHAR(b,s,c,f) ((s) + (c))
198 #define MB_PREVCHAR(b,s,f) ((s) - 1)
200 #define MB_INVALIDCH(x) (0)
201 #define MB_NULLWCH(x) (0)
203 #define UTF8_SINGLEBYTE(c) (1)
205 #if !defined (HAVE_WCHAR_T) && !defined (wchar_t)
209 #endif /* !HANDLE_MULTIBYTE */
211 extern int rl_byte_oriented;
213 #endif /* _RL_MBUTIL_H_ */