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rlmbutil.h

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1/* rlmbutil.h -- utility functions for multibyte characters. */-
2-
3/* Copyright (C) 2001-2015 Free Software Foundation, Inc.-
4-
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. -
7-
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.-
12-
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.-
17-
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/>.-
20*/-
21-
22#if !defined (_RL_MBUTIL_H_)-
23#define _RL_MBUTIL_H_-
24-
25#include "rlstdc.h"-
26-
27/************************************************/-
28/* check multibyte capability for I18N code */-
29/************************************************/-
30-
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)-
35# include <wchar.h>-
36# include <wctype.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-
49# endif-
50#endif-
51-
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-
56#endif-
57-
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-
66#endif-
67-
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-
71# include <limits.h>-
72# if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16)-
73# undef MB_LEN_MAX-
74# endif-
75# if !defined (MB_LEN_MAX)-
76# define MB_LEN_MAX 16-
77# endif-
78#endif-
79-
80/************************************************/-
81/* end of multibyte capability checks for I18N */-
82/************************************************/-
83-
84/*-
85 * Flags for _rl_find_prev_mbchar and _rl_find_next_mbchar:-
86 *-
87 * MB_FIND_ANY find any multibyte character-
88 * MB_FIND_NONZERO find a non-zero-width multibyte character-
89 */-
90-
91#define MB_FIND_ANY 0x00-
92#define MB_FIND_NONZERO 0x01-
93-
94extern int _rl_find_prev_mbchar PARAMS((char *, int, int));-
95extern int _rl_find_next_mbchar PARAMS((char *, int, int, int));-
96-
97#ifdef HANDLE_MULTIBYTE-
98-
99extern int _rl_compare_chars PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *));-
100extern int _rl_get_char_len PARAMS((char *, mbstate_t *));-
101extern int _rl_adjust_point PARAMS((char *, int, mbstate_t *));-
102-
103extern int _rl_read_mbchar PARAMS((char *, int));-
104extern int _rl_read_mbstring PARAMS((int, char *, int));-
105-
106extern int _rl_is_mbchar_matched PARAMS((char *, int, int, char *, int));-
107-
108extern wchar_t _rl_char_value PARAMS((char *, int));-
109extern int _rl_walphabetic PARAMS((wchar_t));-
110-
111#define _rl_to_wupper(wc) (iswlower (wc) ? towupper (wc) : (wc))-
112#define _rl_to_wlower(wc) (iswupper (wc) ? towlower (wc) : (wc))-
113-
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)) \-
117 : ((s) + (c)))-
118#define MB_PREVCHAR(b,s,f) \-
119 ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \-
120 ? _rl_find_prev_mbchar ((b), (s), (f)) \-
121 : ((s) - 1))-
122-
123#define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2)-
124#define MB_NULLWCH(x) ((x) == 0)-
125-
126/* Try and shortcut the printable ascii characters to cut down the number of-
127 calls to a libc wcwidth() */-
128static inline int-
129_rl_wcwidth (wc)-
130 wchar_t wc;-
131{-
132 switch (wc)-
133 {-
134 case ' ': case '!': case '"': case '#': case '%':
never executed: case ' ':
never executed: case '!':
never executed: case '"':
never executed: case '#':
never executed: case '%':
0
135 case '&': case '\'': case '(': case ')': case '*':
never executed: case '&':
never executed: case '\'':
never executed: case '(':
never executed: case ')':
never executed: case '*':
0
136 case '+': case ',': case '-': case '.': case '/':
never executed: case '+':
never executed: case ',':
never executed: case '-':
never executed: case '.':
never executed: case '/':
0
137 case '0': case '1': case '2': case '3': case '4':
never executed: case '0':
never executed: case '1':
never executed: case '2':
never executed: case '3':
never executed: case '4':
0
138 case '5': case '6': case '7': case '8': case '9':
never executed: case '5':
never executed: case '6':
never executed: case '7':
never executed: case '8':
never executed: case '9':
0
139 case ':': case ';': case '<': case '=': case '>':
never executed: case ':':
never executed: case ';':
never executed: case '<':
never executed: case '=':
never executed: case '>':
0
140 case '?':
never executed: case '?':
0
141 case 'A': case 'B': case 'C': case 'D': case 'E':
never executed: case 'A':
never executed: case 'B':
never executed: case 'C':
never executed: case 'D':
never executed: case 'E':
0
142 case 'F': case 'G': case 'H': case 'I': case 'J':
never executed: case 'F':
never executed: case 'G':
never executed: case 'H':
never executed: case 'I':
never executed: case 'J':
0
143 case 'K': case 'L': case 'M': case 'N': case 'O':
never executed: case 'K':
never executed: case 'L':
never executed: case 'M':
never executed: case 'N':
never executed: case 'O':
0
144 case 'P': case 'Q': case 'R': case 'S': case 'T':
never executed: case 'P':
never executed: case 'Q':
never executed: case 'R':
never executed: case 'S':
never executed: case 'T':
0
145 case 'U': case 'V': case 'W': case 'X': case 'Y':
never executed: case 'U':
never executed: case 'V':
never executed: case 'W':
never executed: case 'X':
never executed: case 'Y':
0
146 case 'Z':
never executed: case 'Z':
0
147 case '[': case '\\': case ']': case '^': case '_':
never executed: case '[':
never executed: case '\\':
never executed: case ']':
never executed: case '^':
never executed: case '_':
0
148 case 'a': case 'b': case 'c': case 'd': case 'e':
never executed: case 'a':
never executed: case 'b':
never executed: case 'c':
never executed: case 'd':
never executed: case 'e':
0
149 case 'f': case 'g': case 'h': case 'i': case 'j':
never executed: case 'f':
never executed: case 'g':
never executed: case 'h':
never executed: case 'i':
never executed: case 'j':
0
150 case 'k': case 'l': case 'm': case 'n': case 'o':
never executed: case 'k':
never executed: case 'l':
never executed: case 'm':
never executed: case 'n':
never executed: case 'o':
0
151 case 'p': case 'q': case 'r': case 's': case 't':
never executed: case 'p':
never executed: case 'q':
never executed: case 'r':
never executed: case 's':
never executed: case 't':
0
152 case 'u': case 'v': case 'w': case 'x': case 'y':
never executed: case 'u':
never executed: case 'v':
never executed: case 'w':
never executed: case 'x':
never executed: case 'y':
0
153 case 'z': case '{': case '|': case '}': case '~':
never executed: case 'z':
never executed: case '{':
never executed: case '|':
never executed: case '}':
never executed: case '~':
0
154 return 1;
never executed: return 1;
0
155 default:
never executed: default:
0
156 return wcwidth (wc);
never executed: return wcwidth (wc);
0
157 }-
158}-
159-
160/* Unicode combining characters range from U+0300 to U+036F */-
161#define UNICODE_COMBINING_CHAR(x) ((x) >= 768 && (x) <= 879)-
162-
163#if defined (WCWIDTH_BROKEN)-
164# define WCWIDTH(wc) ((_rl_utf8locale && UNICODE_COMBINING_CHAR(wc)) ? 0 : _rl_wcwidth(wc))-
165#else-
166# define WCWIDTH(wc) _rl_wcwidth(wc)-
167#endif-
168-
169#if defined (WCWIDTH_BROKEN)-
170# define IS_COMBINING_CHAR(x) (WCWIDTH(x) == 0 && iswcntrl(x) == 0)-
171#else-
172# define IS_COMBINING_CHAR(x) (WCWIDTH(x) == 0)-
173#endif-
174-
175#define UTF8_SINGLEBYTE(c) (((c) & 0x80) == 0)-
176-
177#else /* !HANDLE_MULTIBYTE */-
178-
179#undef MB_LEN_MAX-
180#undef MB_CUR_MAX-
181-
182#define MB_LEN_MAX 1-
183#define MB_CUR_MAX 1-
184-
185#define _rl_find_prev_mbchar(b, i, f) (((i) == 0) ? (i) : ((i) - 1))-
186#define _rl_find_next_mbchar(b, i1, i2, f) ((i1) + (i2))-
187-
188#define _rl_char_value(buf,ind) ((buf)[(ind)])-
189-
190#define _rl_walphabetic(c) (rl_alphabetic (c))-
191-
192#define _rl_to_wupper(c) (_rl_to_upper (c))-
193#define _rl_to_wlower(c) (_rl_to_lower (c))-
194-
195#define MB_NEXTCHAR(b,s,c,f) ((s) + (c))-
196#define MB_PREVCHAR(b,s,f) ((s) - 1)-
197-
198#define MB_INVALIDCH(x) (0)-
199#define MB_NULLWCH(x) (0)-
200-
201#define UTF8_SINGLEBYTE(c) (1)-
202-
203#if !defined (HAVE_WCHAR_T) && !defined (wchar_t)-
204# define wchar_t int-
205#endif-
206-
207#endif /* !HANDLE_MULTIBYTE */-
208-
209extern int rl_byte_oriented;-
210-
211#endif /* _RL_MBUTIL_H_ */-
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