mirror of https://github.com/tmux/tmux.git
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* $Id: util.c,v 1.5 2009-04-30 16:24:20 nicm Exp $ */
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/*
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* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include "tmux.h"
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/* Return a section of a string around a point. */
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char *
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section_string(char *buf, size_t len, size_t sectoff, size_t sectlen)
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{
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char *s;
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size_t first, last;
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if (len <= sectlen) {
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first = 0;
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last = len;
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} else if (sectoff < sectlen / 2) {
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first = 0;
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last = sectlen;
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} else if (sectoff + sectlen / 2 > len) {
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last = len;
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first = last - sectlen;
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} else {
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first = sectoff - sectlen / 2;
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last = first + sectlen;
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}
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if (last - first > 3 && first != 0)
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first += 3;
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if (last - first > 3 && last != len)
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last -= 3;
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xasprintf(&s, "%s%.*s%s", first == 0 ? "" : "...",
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(int) (last - first), buf + first, last == len ? "" : "...");
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return (s);
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}
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/* Clean string of invisible characters. */
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void
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clean_string(const char *in, char *buf, size_t len)
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{
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const u_char *cp;
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size_t off;
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off = 0;
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for (cp = in; *cp != '\0'; cp++) {
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if (off >= len)
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break;
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if (*cp >= 0x20 && *cp <= 0x7f)
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buf[off++] = *cp;
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else
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off += xsnprintf(buf + off, len - off, "\\%03hho", *cp);
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}
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if (off < len)
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buf[off] = '\0';
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}
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