1 /* linebreak.h - line breaking of Unicode strings
2 Copyright (C) 2001-2003, 2006 Free Software Foundation, Inc.
3 Written by Bruno Haible <haible@clisp.cons.org>, 2001.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
33 /* These functions are locale dependent. The encoding argument identifies
34 the encoding (e.g. "ISO-8859-2" for Polish). */
36 /* Return the encoding of the current locale. */
37 extern const char * locale_charset (void);
39 /* Determine number of column positions required for UC. */
40 extern int uc_width (unsigned int uc, const char *encoding);
42 /* Determine number of column positions required for first N units
43 (or fewer if S ends before this) in S. */
44 extern int u8_width (const unsigned char *s, size_t n, const char *encoding);
45 extern int u16_width (const unsigned short *s, size_t n, const char *encoding);
46 extern int u32_width (const unsigned int *s, size_t n, const char *encoding);
59 /* Determine the line break points in S, and store the result at p[0..n-1].
60 p[i] = UC_BREAK_MANDATORY means that s[i] is a line break character.
61 p[i] = UC_BREAK_POSSIBLE means that a line break may be inserted between
63 p[i] = UC_BREAK_HYPHENATION means that a hyphen and a line break may be
64 inserted between s[i-1] and s[i]. But beware of language dependent
66 p[i] = UC_BREAK_PROHIBITED means that s[i-1] and s[i] must not be separated.
68 extern void u8_possible_linebreaks (const unsigned char *s, size_t n,
71 extern void u16_possible_linebreaks (const unsigned short *s, size_t n,
74 extern void u32_possible_linebreaks (const unsigned int *s, size_t n,
77 extern void mbs_possible_linebreaks (const char *s, size_t n,
81 /* Choose the best line breaks, assuming the uc_width function.
82 Return the column after the end of the string.
83 o is an optional override; if o[i] != UC_BREAK_UNDEFINED, o[i] takes
84 precedence over p[i] as returned by the *_possible_linebreaks function.
87 u8_width_linebreaks (const unsigned char *s, size_t n,
88 int width, int start_column, int at_end_columns,
89 const char *o, const char *encoding,
92 u16_width_linebreaks (const unsigned short *s, size_t n,
93 int width, int start_column, int at_end_columns,
94 const char *o, const char *encoding,
97 u32_width_linebreaks (const unsigned int *s, size_t n,
98 int width, int start_column, int at_end_columns,
99 const char *o, const char *encoding,
102 mbs_width_linebreaks (const char *s, size_t n,
103 int width, int start_column, int at_end_columns,
104 const char *o, const char *encoding,
113 #endif /* _LINEBREAK_H */