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vis functions for Linux.

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This commit is contained in:
Nicholas Marriott
2009-01-10 12:52:57 +00:00
parent a1b43faa43
commit 934e6d9413
5 changed files with 314 additions and 5 deletions
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8
GNUmakefile
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@@ -1,4 +1,4 @@
# $Id: GNUmakefile,v 1.46 2008-12-15 21:21:56 nicm Exp $
# $Id: GNUmakefile,v 1.47 2009-01-10 12:52:57 nicm Exp $
.PHONY: clean
@@ -31,9 +31,9 @@ SRCS= tmux.c server.c server-msg.c server-fn.c buffer.c buffer-poll.c status.c \
cmd-show-window-options.c cmd-command-prompt.c cmd-set-buffer.c \
cmd-show-buffer.c cmd-list-buffers.c cmd-delete-buffer.c \
cmd-list-commands.c cmd-move-window.c cmd-select-prompt.c \
cmd-respawn-window.c cmd-source-file.c \
cmd-respawn-window.c cmd-source-file.c cmd-server-info.c \
window-scroll.c window-more.c window-copy.c options.c paste.c \
tty.c tty-keys.c tty-write.c colour.c utf8.c options-cmd.c
tty.c tty-term.c tty-keys.c tty-write.c colour.c utf8.c options-cmd.c
CC?= gcc
INCDIRS+= -I. -I-
@@ -88,7 +88,7 @@ endif
ifeq ($(shell uname),Linux)
INCDIRS+= -Icompat
SRCS+= compat/strlcpy.c compat/strlcat.c compat/strtonum.c \
compat/fgetln.c compat/getopt_long.c
compat/fgetln.c compat/getopt_long.c compat/vis.c
CFLAGS+= $(shell getconf LFS_CFLAGS) -D_GNU_SOURCE \
-DNO_STRLCPY -DNO_STRLCAT -DNO_STRTONUM -DNO_SETPROCTITLE \
-DNO_QUEUE_H -DNO_TREE_H -DUSE_PTY_H -DNO_FGETLN \

2
TODO
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@@ -63,3 +63,5 @@
- document server-info
- document status line options, title bits
- document window options changes
- FAQ: why; vim 256 colours; vim ctrl-pgup/dn; bug reports

3
cmd-server-info.c
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@@ -1,4 +1,4 @@
/* $Id: cmd-server-info.c,v 1.4 2009-01-10 01:51:21 nicm Exp $ */
/* $Id: cmd-server-info.c,v 1.5 2009-01-10 12:52:57 nicm Exp $ */
/*
* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -19,6 +19,7 @@
#include <sys/types.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <vis.h>

219
compat/vis.c Normal file
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@@ -0,0 +1,219 @@
/* $OpenBSD: vis.c,v 1.19 2005/09/01 17:15:49 millert Exp $ */
/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/types.h>
#include <limits.h>
#include <ctype.h>
#include <string.h>
#include <vis.h>
#define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
#define isvisible(c) \
(((u_int)(c) <= UCHAR_MAX && isascii((u_char)(c)) && \
(((c) != '*' && (c) != '?' && (c) != '[' && (c) != '#') || \
(flag & VIS_GLOB) == 0) && isgraph((u_char)(c))) || \
((flag & VIS_SP) == 0 && (c) == ' ') || \
((flag & VIS_TAB) == 0 && (c) == '\t') || \
((flag & VIS_NL) == 0 && (c) == '\n') || \
((flag & VIS_SAFE) && ((c) == '\b' || \
(c) == '\007' || (c) == '\r' || \
isgraph((u_char)(c)))))
/*
* vis - visually encode characters
*/
char *
vis(char *dst, int c, int flag, int nextc)
{
if (isvisible(c)) {
*dst++ = c;
if (c == '\\' && (flag & VIS_NOSLASH) == 0)
*dst++ = '\\';
*dst = '\0';
return (dst);
}
if (flag & VIS_CSTYLE) {
switch(c) {
case '\n':
*dst++ = '\\';
*dst++ = 'n';
goto done;
case '\r':
*dst++ = '\\';
*dst++ = 'r';
goto done;
case '\b':
*dst++ = '\\';
*dst++ = 'b';
goto done;
case '\a':
*dst++ = '\\';
*dst++ = 'a';
goto done;
case '\v':
*dst++ = '\\';
*dst++ = 'v';
goto done;
case '\t':
*dst++ = '\\';
*dst++ = 't';
goto done;
case '\f':
*dst++ = '\\';
*dst++ = 'f';
goto done;
case ' ':
*dst++ = '\\';
*dst++ = 's';
goto done;
case '\0':
*dst++ = '\\';
*dst++ = '0';
if (isoctal(nextc)) {
*dst++ = '0';
*dst++ = '0';
}
goto done;
}
}
if (((c & 0177) == ' ') || (flag & VIS_OCTAL) ||
((flag & VIS_GLOB) && (c == '*' || c == '?' || c == '[' || c == '#'))) {
*dst++ = '\\';
*dst++ = ((u_char)c >> 6 & 07) + '0';
*dst++ = ((u_char)c >> 3 & 07) + '0';
*dst++ = ((u_char)c & 07) + '0';
goto done;
}
if ((flag & VIS_NOSLASH) == 0)
*dst++ = '\\';
if (c & 0200) {
c &= 0177;
*dst++ = 'M';
}
if (iscntrl((u_char)c)) {
*dst++ = '^';
if (c == 0177)
*dst++ = '?';
else
*dst++ = c + '@';
} else {
*dst++ = '-';
*dst++ = c;
}
done:
*dst = '\0';
return (dst);
}
/*
* strvis, strnvis, strvisx - visually encode characters from src into dst
*
* Dst must be 4 times the size of src to account for possible
* expansion. The length of dst, not including the trailing NULL,
* is returned.
*
* Strnvis will write no more than siz-1 bytes (and will NULL terminate).
* The number of bytes needed to fully encode the string is returned.
*
* Strvisx encodes exactly len bytes from src into dst.
* This is useful for encoding a block of data.
*/
int
strvis(char *dst, const char *src, int flag)
{
char c;
char *start;
for (start = dst; (c = *src);)
dst = vis(dst, c, flag, *++src);
*dst = '\0';
return (dst - start);
}
int
strnvis(char *dst, const char *src, size_t siz, int flag)
{
char *start, *end;
char tbuf[5];
int c, i;
i = 0;
for (start = dst, end = start + siz - 1; (c = *src) && dst < end; ) {
if (isvisible(c)) {
i = 1;
*dst++ = c;
if (c == '\\' && (flag & VIS_NOSLASH) == 0) {
/* need space for the extra '\\' */
if (dst < end)
*dst++ = '\\';
else {
dst--;
i = 2;
break;
}
}
src++;
} else {
i = vis(tbuf, c, flag, *++src) - tbuf;
if (dst + i <= end) {
memcpy(dst, tbuf, i);
dst += i;
} else {
src--;
break;
}
}
}
if (siz > 0)
*dst = '\0';
if (dst + i > end) {
/* adjust return value for truncation */
while ((c = *src))
dst += vis(tbuf, c, flag, *++src) - tbuf;
}
return (dst - start);
}
int
strvisx(char *dst, const char *src, size_t len, int flag)
{
char c;
char *start;
for (start = dst; len > 1; len--) {
c = *src;
dst = vis(dst, c, flag, *++src);
}
if (len)
dst = vis(dst, *src, flag, '\0');
*dst = '\0';
return (dst - start);
}

87
compat/vis.h Normal file
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@@ -0,0 +1,87 @@
/* $OpenBSD: vis.h,v 1.11 2005/08/09 19:38:31 millert Exp $ */
/* $NetBSD: vis.h,v 1.4 1994/10/26 00:56:41 cgd Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)vis.h 5.9 (Berkeley) 4/3/91
*/
#ifndef _VIS_H_
#define _VIS_H_
/*
* to select alternate encoding format
*/
#define VIS_OCTAL 0x01 /* use octal \ddd format */
#define VIS_CSTYLE 0x02 /* use \[nrft0..] where appropriate */
/*
* to alter set of characters encoded (default is to encode all
* non-graphic except space, tab, and newline).
*/
#define VIS_SP 0x04 /* also encode space */
#define VIS_TAB 0x08 /* also encode tab */
#define VIS_NL 0x10 /* also encode newline */
#define VIS_WHITE (VIS_SP | VIS_TAB | VIS_NL)
#define VIS_SAFE 0x20 /* only encode "unsafe" characters */
/*
* other
*/
#define VIS_NOSLASH 0x40 /* inhibit printing '\' */
#define VIS_GLOB 0x100 /* encode glob(3) magics and '#' */
/*
* unvis return codes
*/
#define UNVIS_VALID 1 /* character valid */
#define UNVIS_VALIDPUSH 2 /* character valid, push back passed char */
#define UNVIS_NOCHAR 3 /* valid sequence, no character produced */
#define UNVIS_SYNBAD -1 /* unrecognized escape sequence */
#define UNVIS_ERROR -2 /* decoder in unknown state (unrecoverable) */
/*
* unvis flags
*/
#define UNVIS_END 1 /* no more characters */
#include <sys/cdefs.h>
__BEGIN_DECLS
char *vis(char *, int, int, int);
int strvis(char *, const char *, int);
int strnvis(char *, const char *, size_t, int);
int strvisx(char *, const char *, size_t, int);
int strunvis(char *, const char *);
int unvis(char *, char, int *, int);
ssize_t strnunvis(char *, const char *, size_t);
__END_DECLS
#endif /* !_VIS_H_ */