Sync up vis.* for stravis().

compat/vis.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: vis.c,v 1.19 2005/09/01 17:15:49 millert Exp $ */
+/*	$OpenBSD: vis.c,v 1.24 2015/07/20 01:52:28 millert Exp $ */
 /*-
  * Copyright (c) 1989, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -29,14 +29,17 @@
  */
 
 #include <sys/types.h>
-#include <limits.h>
+#include <errno.h>
 #include <ctype.h>
+#include <limits.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include "tmux.h"
 
 #define	isoctal(c)	(((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
-#define	isvisible(c)							\
+#define	isvisible(c,flag)						\
+	(((c) == '\\' || (flag & VIS_ALL) == 0) &&			\
 	(((u_int)(c) <= UCHAR_MAX && isascii((u_char)(c)) &&		\
 	(((c) != '*' && (c) != '?' && (c) != '[' && (c) != '#') ||	\
 		(flag & VIS_GLOB) == 0) && isgraph((u_char)(c))) ||	\
@@ -45,7 +48,7 @@
 	((flag & VIS_NL) == 0 && (c) == '\n') ||			\
 	((flag & VIS_SAFE) && ((c) == '\b' ||				\
 		(c) == '\007' || (c) == '\r' ||				\
-		isgraph((u_char)(c)))))
+		isgraph((u_char)(c))))))
 
 /*
  * vis - visually encode characters
@@ -53,10 +56,11 @@
 char *
 vis(char *dst, int c, int flag, int nextc)
 {
-	if (isvisible(c)) {
-		*dst++ = c;
-		if (c == '\\' && (flag & VIS_NOSLASH) == 0)
+	if (isvisible(c, flag)) {
+		if ((c == '"' && (flag & VIS_DQ) != 0) ||
+		    (c == '\\' && (flag & VIS_NOSLASH) == 0))
 			*dst++ = '\\';
+		*dst++ = c;
 		*dst = '\0';
 		return (dst);
 	}
@@ -168,19 +172,18 @@ strnvis(char *dst, const char *src, size_t siz, int flag)
 
 	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) {
+		if (isvisible(c, flag)) {
+			if ((c == '"' && (flag & VIS_DQ) != 0) ||
+			    (c == '\\' && (flag & VIS_NOSLASH) == 0)) {
 				/* need space for the extra '\\' */
-				if (dst < end)
-					*dst++ = '\\';
-				else {
-					dst--;
+				if (dst + 1 >= end) {
 					i = 2;
 					break;
 				}
+				*dst++ = '\\';
 			}
+			i = 1;
+			*dst++ = c;
 			src++;
 		} else {
 			i = vis(tbuf, c, flag, *++src) - tbuf;
@@ -203,6 +206,25 @@ strnvis(char *dst, const char *src, size_t siz, int flag)
 	return (dst - start);
 }
 
+int
+stravis(char **outp, const char *src, int flag)
+{
+	char *buf;
+	int len, serrno;
+
+	buf = calloc(4, strlen(src) + 1);
+	if (buf == NULL)
+		return -1;
+	len = strvis(buf, src, flag);
+	serrno = errno;
+	*outp = realloc(buf, len + 1);
+	if (*outp == NULL) {
+		*outp = buf;
+		errno = serrno;
+	}
+	return (len);
+}
+
 int
 strvisx(char *dst, const char *src, size_t len, int flag)
 {

compat/vis.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: vis.h,v 1.11 2005/08/09 19:38:31 millert Exp $	*/
+/*	$OpenBSD: vis.h,v 1.15 2015/07/20 01:52:27 millert Exp $	*/
 /*	$NetBSD: vis.h,v 1.4 1994/10/26 00:56:41 cgd Exp $	*/
 
 /*-
@@ -50,6 +50,8 @@
 #define	VIS_NL		0x10	/* also encode newline */
 #define	VIS_WHITE	(VIS_SP | VIS_TAB | VIS_NL)
 #define	VIS_SAFE	0x20	/* only encode "unsafe" characters */
+#define	VIS_DQ		0x200	/* backslash-escape double quotes */
+#define	VIS_ALL		0x400	/* encode all characters */
 
 /*
  * other
@@ -71,12 +73,18 @@
  */
 #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	stravis(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_ */

configure.ac

@@ -326,22 +326,22 @@ if test "x$found_strtonum" = xyes; then
 fi
 AM_CONDITIONAL(NO_STRTONUM, [test "x$found_strtonum" = xno])
 
-# Look for strnvis, compat/{vis,unvis}.c used if missing.
-AC_CHECK_FUNC(strnvis, found_strnvis=yes, found_strnvis=no)
-if test "x$found_strnvis" = xyes; then
+# Look for stravis, compat/{vis,unvis}.c used if missing.
+AC_CHECK_FUNC(stravis, found_stravis=yes, found_stravis=no)
+if test "x$found_stravis" = xyes; then
 	AC_MSG_CHECKING(if strnvis is broken)
 	AC_EGREP_HEADER([strnvis\(char \*, const char \*, size_t, int\)],
 			vis.h,
 			AC_MSG_RESULT(no),
-			[found_strnvis=no])
-	if test "x$found_strnvis" = xno; then
+			[found_stravis=no])
+	if test "x$found_stravis" = xno; then
 		AC_MSG_RESULT(yes)
 	fi
 fi
-if test "x$found_strnvis" = xyes; then
+if test "x$found_stravis" = xyes; then
 	AC_DEFINE(HAVE_VIS)
 fi
-AM_CONDITIONAL(NO_VIS, [test "x$found_strnvis" = xno])
+AM_CONDITIONAL(NO_VIS, [test "x$found_stravis" = xno])
 
 # Look for cfmakeraw, compat/cfmakeraw.c used if missing.
 AC_CHECK_FUNC(cfmakeraw, found_cfmakeraw=yes, found_cfmakeraw=no)