Mercurial > ~mikael > mcabber > hg
diff mcabber/src/utf8.c @ 930:a75f7a13df7b
UTF-8 terminal support (Reimar Döffinger)
This is a patch from Reimar Döffinger, slightly modified,
which makes mcabber work better on UTF-8 terminals.
author | Mikael Berthe <mikael@lilotux.net> |
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date | Sat, 08 Jul 2006 09:40:05 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mcabber/src/utf8.c Sat Jul 08 09:40:05 2006 +0200 @@ -0,0 +1,98 @@ +/* + * utf8.c -- UTF-8 routines + * + * Copyright (C) 2006 Reimar Döffinger <Reimar.Doeffinger@stud.uni-karlsruhe.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program 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 + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + * USA + */ + +#include "utf8.h" + +char *prev_char(char *str, const char *limit) +{ + if (str <= limit) + return str; + str--; + if (utf8_mode) + while ((str > limit) && ((*str & 0xc0) == 0x80)) + str--; + return str; +} + +char *next_char(char *str) +{ + if (!*str) + return str; + str++; + if (utf8_mode) + while ((*str & 0xc0) == 0x80) + str++; + return str; +} + +unsigned get_char(const char *str) +{ + unsigned char *strp = (unsigned char *)str; + unsigned c = *strp++; + unsigned mask = 0x80; + int len = -1; + if (!utf8_mode) + return c; + while (c & mask) { + mask >>= 1; + len++; + } + if (len <= 0 || len > 4) + goto no_utf8; + c &= mask - 1; + while ((*strp & 0xc0) == 0x80) { + if (len-- <= 0) + goto no_utf8; + c = (c << 6) | (*strp++ & 0x3f); + } + if (len) + goto no_utf8; + return c; + +no_utf8: + return *str; +} + +char *put_char(char *str, unsigned c) +{ + int mask = 0xffffffc0; + int i = 4; + char code[5]; + if (!utf8_mode || c < 128) { + *str++ = c; + return str; + } + while (c & mask) { + code[i--] = 0x80 | (c & 0x3f); + c >>= 6; + mask >>= 1; + if (i < 0) { + *str++ = '?'; + return str; + } + } + code[i] = (mask << 1) | c; + for (; i < 5; i++) + *str++ = code[i]; + return str; +} + +/* vim: set expandtab cindent cinoptions=>2\:2(0: For Vim users... */