1: /* rlmbutil.h -- utility functions for multibyte characters. */
2:
3: /* Copyright (C) 2001-2009 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:
94: extern int _rl_find_prev_mbchar PARAMS((char *, int, int));
95: extern int _rl_find_next_mbchar PARAMS((char *, int, int, int));
96:
97: #ifdef HANDLE_MULTIBYTE
98:
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 *));
102:
103: extern int _rl_read_mbchar PARAMS((char *, int));
104: extern int _rl_read_mbstring PARAMS((int, char *, int));
105:
106: extern int _rl_is_mbchar_matched PARAMS((char *, int, int, char *, int));
107:
108: extern wchar_t _rl_char_value PARAMS((char *, int));
109: extern 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: /* Unicode combining characters range from U+0300 to U+036F */
127: #define UNICODE_COMBINING_CHAR(x) ((x) >= 768 && (x) <= 879)
128:
129: #if defined (WCWIDTH_BROKEN)
130: # define WCWIDTH(wc) ((_rl_utf8locale && UNICODE_COMBINING_CHAR(wc)) ? 0 : wcwidth(wc))
131: #else
132: # define WCWIDTH(wc) wcwidth(wc)
133: #endif
134:
135: #else /* !HANDLE_MULTIBYTE */
136:
137: #undef MB_LEN_MAX
138: #undef MB_CUR_MAX
139:
140: #define MB_LEN_MAX 1
141: #define MB_CUR_MAX 1
142:
143: #define _rl_find_prev_mbchar(b, i, f) (((i) == 0) ? (i) : ((i) - 1))
144: #define _rl_find_next_mbchar(b, i1, i2, f) ((i1) + (i2))
145:
146: #define _rl_char_value(buf,ind) ((buf)[(ind)])
147:
148: #define _rl_walphabetic(c) (rl_alphabetic (c))
149:
150: #define _rl_to_wupper(c) (_rl_to_upper (c))
151: #define _rl_to_wlower(c) (_rl_to_lower (c))
152:
153: #define MB_NEXTCHAR(b,s,c,f) ((s) + (c))
154: #define MB_PREVCHAR(b,s,f) ((s) - 1)
155:
156: #define MB_INVALIDCH(x) (0)
157: #define MB_NULLWCH(x) (0)
158:
159: #endif /* !HANDLE_MULTIBYTE */
160:
161: extern int rl_byte_oriented;
162:
163: #endif /* _RL_MBUTIL_H_ */
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