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Annotation of embedaddon/tmux/compat/utf8proc.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (c) 2016 Joshua Rubin <joshua@rubixconsulting.com>
        !             3:  *
        !             4:  * Permission to use, copy, modify, and distribute this software for any
        !             5:  * purpose with or without fee is hereby granted, provided that the above
        !             6:  * copyright notice and this permission notice appear in all copies.
        !             7:  *
        !             8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !             9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            12:  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
        !            13:  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
        !            14:  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            15:  */
        !            16: 
        !            17: #include <sys/types.h>
        !            18: 
        !            19: #include <utf8proc.h>
        !            20: 
        !            21: #include "compat.h"
        !            22: 
        !            23: int
        !            24: utf8proc_wcwidth(wchar_t wc)
        !            25: {
        !            26:        int     cat;
        !            27: 
        !            28:        cat = utf8proc_category(wc);
        !            29:        if (cat == UTF8PROC_CATEGORY_CO) {
        !            30:                /*
        !            31:                 * The private use category is where powerline and similar
        !            32:                 * codepoints are stored, they have "ambiguous" width - use 1.
        !            33:                 */
        !            34:                return (1);
        !            35:        }
        !            36:        return (utf8proc_charwidth(wc));
        !            37: }
        !            38: 
        !            39: int
        !            40: utf8proc_mbtowc(wchar_t *pwc, const char *s, size_t n)
        !            41: {
        !            42:        utf8proc_ssize_t        slen;
        !            43: 
        !            44:        if (s == NULL)
        !            45:                return (0);
        !            46: 
        !            47:        /*
        !            48:         * *pwc == -1 indicates invalid codepoint
        !            49:         * slen < 0 indicates an error
        !            50:         */
        !            51:        slen = utf8proc_iterate(s, n, pwc);
        !            52:        if (*pwc == (wchar_t)-1 || slen < 0)
        !            53:                return (-1);
        !            54:        return (slen);
        !            55: }
        !            56: 
        !            57: int
        !            58: utf8proc_wctomb(char *s, wchar_t wc)
        !            59: {
        !            60:        if (s == NULL)
        !            61:                return (0);
        !            62: 
        !            63:        if (!utf8proc_codepoint_valid(wc))
        !            64:                return (-1);
        !            65:        return (utf8proc_encode_char(wc, s));
        !            66: }