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/* $OpenBSD: util.c,v 1.1 2009/06/01 22:58:49 nicm Exp $ */
/*
* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include "tmux.h"
/* Return a section of a string around a point. */
char *
section_string(char *buf, size_t len, size_t sectoff, size_t sectlen)
{
char *s;
size_t first, last;
if (len <= sectlen) {
first = 0;
last = len;
} else if (sectoff < sectlen / 2) {
first = 0;
last = sectlen;
} else if (sectoff + sectlen / 2 > len) {
last = len;
first = last - sectlen;
} else {
first = sectoff - sectlen / 2;
last = first + sectlen;
}
if (last - first > 3 && first != 0)
first += 3;
if (last - first > 3 && last != len)
last -= 3;
xasprintf(&s, "%s%.*s%s", first == 0 ? "" : "...",
(int) (last - first), buf + first, last == len ? "" : "...");
return (s);
}
/* Clean string of invisible characters. */
void
clean_string(const char *in, char *buf, size_t len)
{
const u_char *cp;
size_t off;
off = 0;
for (cp = in; *cp != '\0'; cp++) {
if (off >= len)
break;
if (*cp >= 0x20 && *cp <= 0x7f)
buf[off++] = *cp;
else
off += xsnprintf(buf + off, len - off, "\\%03hho", *cp);
}
if (off < len)
buf[off] = '\0';
}
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