From 1c6a5c10a362fd36b365582979f652431752c99a Mon Sep 17 00:00:00 2001
From: Xin LI <delphij@FreeBSD.org>
Date: Mon, 8 Oct 2007 16:14:52 +0000
Subject: [PATCH] Virgin import of less v408.

Approved by:	re (kensmith)
---
 contrib/less/NEWS         | 12 +++++++++
 contrib/less/README       |  4 +--
 contrib/less/ch.c         | 25 +++++++++++++++++
 contrib/less/charset.c    | 56 +++++++++++++++++++++++++++++++++++++++
 contrib/less/configure    |  1 +
 contrib/less/configure.ac |  3 ++-
 contrib/less/filename.c   |  2 +-
 contrib/less/funcs.h      |  1 +
 contrib/less/jump.c       |  9 ++++++-
 contrib/less/less.h       |  3 +++
 contrib/less/less.man     |  2 +-
 contrib/less/less.nro     |  2 +-
 contrib/less/lessecho.man |  2 +-
 contrib/less/lessecho.nro |  2 +-
 contrib/less/lesskey.man  |  2 +-
 contrib/less/lesskey.nro  |  2 +-
 contrib/less/line.c       | 10 +++----
 contrib/less/search.c     | 42 ++++++++++++++++++-----------
 contrib/less/signal.c     |  2 ++
 contrib/less/version.c    |  4 ++-
 20 files changed, 154 insertions(+), 32 deletions(-)

diff --git a/contrib/less/NEWS b/contrib/less/NEWS
index ccb14ba432bd..f251a1e71ef6 100644
--- a/contrib/less/NEWS
+++ b/contrib/less/NEWS
@@ -13,6 +13,18 @@
 ======================================================================
 
 
+	Major changes between "less" versions 406 and 408
+
+* Support CSI escape sequences, like SGR escape sequences.
+
+* Fix bug which caused screen to fail to repaint when window is resized.
+
+* Fix bug in using -i and -I flags with non-ASCII text.
+
+* Fix configure bug on systems which don't support langinfo.h.
+
+======================================================================
+
 	Major changes between "less" versions 394 and 406
 
 * Allow decimal point in number for % (percent) command.
diff --git a/contrib/less/README b/contrib/less/README
index 848fe4de7731..ace7bf090ed1 100644
--- a/contrib/less/README
+++ b/contrib/less/README
@@ -1,7 +1,7 @@
 
-                            Less, version 406
+                            Less, version 408
 
-    This is the distribution of less, version 406, released 19 Jun 2007.
+    This is the distribution of less, version 408, released 01 Oct 2007.
     This program is part of the GNU project (http://www.gnu.org).
 
     This program is free software.  You may redistribute it and/or
diff --git a/contrib/less/ch.c b/contrib/less/ch.c
index 61bc83a48aac..2ac14d7a1a8e 100644
--- a/contrib/less/ch.c
+++ b/contrib/less/ch.c
@@ -128,6 +128,9 @@ fch_get()
 	POSITION pos;
 	POSITION len;
 
+	if (thisfile == NULL)
+		return (EOI);
+
 	slept = FALSE;
 
 	/*
@@ -416,6 +419,9 @@ ch_seek(pos)
 	BLOCKNUM new_block;
 	POSITION len;
 
+	if (thisfile == NULL)
+		return (0);
+
 	len = ch_length();
 	if (pos < ch_zero() || (len != NULL_POSITION && pos > len))
 		return (1);
@@ -450,6 +456,9 @@ ch_end_seek()
 {
 	POSITION len;
 
+	if (thisfile == NULL)
+		return (0);
+
 	if (ch_flags & CH_CANSEEK)
 		ch_fsize = filesize(ch_file);
 
@@ -503,6 +512,8 @@ ch_beg_seek()
 	public POSITION
 ch_length()
 {
+	if (thisfile == NULL)
+		return (NULL_POSITION);
 	if (ignore_eoi)
 		return (NULL_POSITION);
 	if (ch_flags & CH_HELPFILE)
@@ -516,6 +527,8 @@ ch_length()
 	public POSITION
 ch_tell()
 {
+	if (thisfile == NULL)
+		return (NULL_POSITION);
 	return (ch_block * LBUFSIZE) + ch_offset;
 }
 
@@ -527,6 +540,8 @@ ch_forw_get()
 {
 	register int c;
 
+	if (thisfile == NULL)
+		return (EOI);
 	c = ch_get();
 	if (c == EOI)
 		return (EOI);
@@ -546,6 +561,8 @@ ch_forw_get()
 	public int
 ch_back_get()
 {
+	if (thisfile == NULL)
+		return (EOI);
 	if (ch_offset > 0)
 		ch_offset --;
 	else
@@ -586,6 +603,9 @@ ch_flush()
 {
 	register struct buf *bp;
 
+	if (thisfile == NULL)
+		return;
+
 	if (!(ch_flags & CH_CANSEEK))
 	{
 		/*
@@ -769,6 +789,9 @@ ch_close()
 {
 	int keepstate = FALSE;
 
+	if (thisfile == NULL)
+		return;
+
 	if (ch_flags & (CH_CANSEEK|CH_POPENED|CH_HELPFILE))
 	{
 		/*
@@ -807,6 +830,8 @@ ch_close()
 	public int
 ch_getflags()
 {
+	if (thisfile == NULL)
+		return (0);
 	return (ch_flags);
 }
 
diff --git a/contrib/less/charset.c b/contrib/less/charset.c
index 3ee76bc6bcfb..628218d50f24 100644
--- a/contrib/less/charset.c
+++ b/contrib/less/charset.c
@@ -567,24 +567,29 @@ get_wchar(p)
 	{
 	case 1:
 	default:
+		/* 0xxxxxxx */
 		return (LWCHAR)
 			(p[0] & 0xFF);
 	case 2:
+		/* 110xxxxx 10xxxxxx */
 		return (LWCHAR) (
 			((p[0] & 0x1F) << 6) |
 			(p[1] & 0x3F));
 	case 3:
+		/* 1110xxxx 10xxxxxx 10xxxxxx */
 		return (LWCHAR) (
 			((p[0] & 0x0F) << 12) |
 			((p[1] & 0x3F) << 6) |
 			(p[2] & 0x3F));
 	case 4:
+		/* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
 		return (LWCHAR) (
 			((p[0] & 0x07) << 18) |
 			((p[1] & 0x3F) << 12) | 
 			((p[2] & 0x3F) << 6) | 
 			(p[3] & 0x3F));
 	case 5:
+		/* 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx */
 		return (LWCHAR) (
 			((p[0] & 0x03) << 24) |
 			((p[1] & 0x3F) << 18) | 
@@ -592,6 +597,7 @@ get_wchar(p)
 			((p[3] & 0x3F) << 6) | 
 			(p[4] & 0x3F));
 	case 6:
+		/* 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx */
 		return (LWCHAR) (
 			((p[0] & 0x01) << 30) |
 			((p[1] & 0x3F) << 24) | 
@@ -602,6 +608,56 @@ get_wchar(p)
 	}
 }
 
+/*
+ * Store a character into a UTF-8 string.
+ */
+	public void
+put_wchar(pp, ch)
+	char **pp;
+	LWCHAR ch;
+{
+	if (!utf_mode || ch < 0x80) 
+	{
+		/* 0xxxxxxx */
+		*(*pp)++ = (char) ch;
+	} else if (ch < 0x800)
+	{
+		/* 110xxxxx 10xxxxxx */
+		*(*pp)++ = (char) (0xC0 | ((ch >> 6) & 0x1F));
+		*(*pp)++ = (char) (0x80 | (ch & 0x3F));
+	} else if (ch < 0x10000)
+	{
+		/* 1110xxxx 10xxxxxx 10xxxxxx */
+		*(*pp)++ = (char) (0xE0 | ((ch >> 12) & 0x0F));
+		*(*pp)++ = (char) (0x80 | ((ch >> 6) & 0x3F));
+		*(*pp)++ = (char) (0x80 | (ch & 0x3F));
+	} else if (ch < 0x200000)
+	{
+		/* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
+		*(*pp)++ = (char) (0xF0 | ((ch >> 18) & 0x07));
+		*(*pp)++ = (char) (0x80 | ((ch >> 12) & 0x3F));
+		*(*pp)++ = (char) (0x80 | ((ch >> 6) & 0x3F));
+		*(*pp)++ = (char) (0x80 | (ch & 0x3F));
+	} else if (ch < 0x4000000)
+	{
+		/* 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx */
+		*(*pp)++ = (char) (0xF0 | ((ch >> 24) & 0x03));
+		*(*pp)++ = (char) (0x80 | ((ch >> 18) & 0x3F));
+		*(*pp)++ = (char) (0x80 | ((ch >> 12) & 0x3F));
+		*(*pp)++ = (char) (0x80 | ((ch >> 6) & 0x3F));
+		*(*pp)++ = (char) (0x80 | (ch & 0x3F));
+	} else 
+	{
+		/* 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx */
+		*(*pp)++ = (char) (0xF0 | ((ch >> 30) & 0x01));
+		*(*pp)++ = (char) (0x80 | ((ch >> 24) & 0x3F));
+		*(*pp)++ = (char) (0x80 | ((ch >> 18) & 0x3F));
+		*(*pp)++ = (char) (0x80 | ((ch >> 12) & 0x3F));
+		*(*pp)++ = (char) (0x80 | ((ch >> 6) & 0x3F));
+		*(*pp)++ = (char) (0x80 | (ch & 0x3F));
+	}
+}
+
 /*
  * Step forward or backward one character in a string.
  */
diff --git a/contrib/less/configure b/contrib/less/configure
index 8501917f1928..3dbc604ebfef 100755
--- a/contrib/less/configure
+++ b/contrib/less/configure
@@ -6473,6 +6473,7 @@ cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #include <locale.h>
 #include <ctype.h>
+#include <langinfo.h>
 int
 main ()
 {
diff --git a/contrib/less/configure.ac b/contrib/less/configure.ac
index 80ec43a8cc1c..d738607ee30c 100644
--- a/contrib/less/configure.ac
+++ b/contrib/less/configure.ac
@@ -304,7 +304,8 @@ fi
 
 AC_MSG_CHECKING(for locale)
 AC_TRY_LINK([#include <locale.h>
-#include <ctype.h>], [setlocale(LC_CTYPE,""); isprint(0); iscntrl(0);],
+#include <ctype.h>
+#include <langinfo.h>], [setlocale(LC_CTYPE,""); isprint(0); iscntrl(0);],
   [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_LOCALE)], [AC_MSG_RESULT(no)])
 AC_MSG_CHECKING(for ctype functions)
 AC_TRY_LINK([
diff --git a/contrib/less/filename.c b/contrib/less/filename.c
index 8e0823e85744..ea3120fbbd89 100644
--- a/contrib/less/filename.c
+++ b/contrib/less/filename.c
@@ -482,7 +482,7 @@ bin_file(f)
 	for (i = 0;  i < n;  i++)
 	{
 		char c = data[i];
-		if (ctldisp == OPT_ONPLUS && c == ESC)
+		if (ctldisp == OPT_ONPLUS && IS_CSI_START(c))
 		{
 			while (++i < n && is_ansi_middle(data[i]))
 				continue;
diff --git a/contrib/less/funcs.h b/contrib/less/funcs.h
index 201052453d38..a4a0c7c2d9f0 100644
--- a/contrib/less/funcs.h
+++ b/contrib/less/funcs.h
@@ -56,6 +56,7 @@
 	public int utf_len ();
 	public int is_utf8_well_formed ();
 	public LWCHAR get_wchar ();
+	public void put_wchar ();
 	public LWCHAR step_char ();
 	public int is_composing_char ();
 	public int is_ubin_char ();
diff --git a/contrib/less/jump.c b/contrib/less/jump.c
index 6e0c90dbcc10..585d9b209e6d 100644
--- a/contrib/less/jump.c
+++ b/contrib/less/jump.c
@@ -31,6 +31,7 @@ extern int top_scroll;
 jump_forw()
 {
 	POSITION pos;
+	POSITION end_pos;
 
 	if (ch_end_seek())
 	{
@@ -42,11 +43,17 @@ jump_forw()
 	 * Go back one line from the end of the file
 	 * to get to the beginning of the last line.
 	 */
-	pos = back_line(ch_tell());
+	pos_clear();
+	end_pos = ch_tell();
+	pos = back_line(end_pos);
 	if (pos == NULL_POSITION)
 		jump_loc((POSITION)0, sc_height-1);
 	else
+	{
 		jump_loc(pos, sc_height-1);
+		if (position(sc_height-1) != end_pos)
+			repaint();
+	}
 }
 
 /*
diff --git a/contrib/less/less.h b/contrib/less/less.h
index bf8b803649af..8f0d2d85e83c 100644
--- a/contrib/less/less.h
+++ b/contrib/less/less.h
@@ -149,6 +149,8 @@ void free();
 #define IS_DIGIT(c)	((c) >= '0' && (c) <= '9')
 #endif
 
+#define IS_CSI_START(c)	((c) == ESC || ((unsigned char)(c)) == CSI)
+
 #ifndef NULL
 #define	NULL	0
 #endif
@@ -424,6 +426,7 @@ struct textlist
 #endif /* IS_EBCDIC_HOST */
 
 #define	ESC		CONTROL('[')
+#define	CSI		((unsigned char)'\233')
 
 #if _OSK_MWC32
 #define	LSIGNAL(sig,func)	os9_signal(sig,func)
diff --git a/contrib/less/less.man b/contrib/less/less.man
index 2efc49dfce82..217a321ccccc 100644
--- a/contrib/less/less.man
+++ b/contrib/less/less.man
@@ -1544,4 +1544,4 @@ LESS(1)                                                                LESS(1)
 
 
 
-                           Version 406: 19 Jun 2007                    LESS(1)
+                           Version 408: 01 Oct 2007                    LESS(1)
diff --git a/contrib/less/less.nro b/contrib/less/less.nro
index ddba6d85672a..5399e83a713c 100644
--- a/contrib/less/less.nro
+++ b/contrib/less/less.nro
@@ -1,4 +1,4 @@
-.TH LESS 1 "Version 406: 19 Jun 2007"
+.TH LESS 1 "Version 408: 01 Oct 2007"
 .SH NAME
 less \- opposite of more
 .SH SYNOPSIS
diff --git a/contrib/less/lessecho.man b/contrib/less/lessecho.man
index 49c863a17e3c..2bf8c9ec0af9 100644
--- a/contrib/less/lessecho.man
+++ b/contrib/less/lessecho.man
@@ -46,4 +46,4 @@ LESSECHO(1)                                                        LESSECHO(1)
 
 
 
-                           Version 406: 19 Jun 2007                LESSECHO(1)
+                           Version 408: 01 Oct 2007                LESSECHO(1)
diff --git a/contrib/less/lessecho.nro b/contrib/less/lessecho.nro
index 297a7323b500..06c39361791f 100644
--- a/contrib/less/lessecho.nro
+++ b/contrib/less/lessecho.nro
@@ -1,4 +1,4 @@
-.TH LESSECHO 1 "Version 406: 19 Jun 2007"
+.TH LESSECHO 1 "Version 408: 01 Oct 2007"
 .SH NAME
 lessecho \- expand metacharacters
 .SH SYNOPSIS
diff --git a/contrib/less/lesskey.man b/contrib/less/lesskey.man
index ffad2c346f4c..b4d4e2fc9cf4 100644
--- a/contrib/less/lesskey.man
+++ b/contrib/less/lesskey.man
@@ -357,4 +357,4 @@ LESSKEY(1)                                                          LESSKEY(1)
 
 
 
-                           Version 406: 19 Jun 2007                 LESSKEY(1)
+                           Version 408: 01 Oct 2007                 LESSKEY(1)
diff --git a/contrib/less/lesskey.nro b/contrib/less/lesskey.nro
index 63cb39a1dc63..a49a1c07a8cb 100644
--- a/contrib/less/lesskey.nro
+++ b/contrib/less/lesskey.nro
@@ -1,4 +1,4 @@
-.TH LESSKEY 1 "Version 406: 19 Jun 2007"
+.TH LESSKEY 1 "Version 408: 01 Oct 2007"
 .SH NAME
 lesskey \- specify key bindings for less
 .SH SYNOPSIS
diff --git a/contrib/less/line.c b/contrib/less/line.c
index e4b9731bd9f6..d61b87288dab 100644
--- a/contrib/less/line.c
+++ b/contrib/less/line.c
@@ -268,7 +268,7 @@ pshift(shift)
 	while (shifted <= shift && from < curr)
 	{
 		c = linebuf[from];
-		if (c == ESC && ctldisp == OPT_ONPLUS)
+		if (ctldisp == OPT_ONPLUS && IS_CSI_START(c))
 		{
 			/* Keep cumulative effect.  */
 			linebuf[to] = c;
@@ -523,7 +523,7 @@ in_ansi_esc_seq()
 	for (p = &linebuf[curr];  p > linebuf; )
 	{
 		LWCHAR ch = step_char(&p, -1, linebuf);
-		if (ch == ESC)
+		if (IS_CSI_START(ch))
 			return (1);
 		if (!is_ansi_middle(ch))
 			return (0);
@@ -602,13 +602,13 @@ store_char(ch, a, rep, pos)
 			/* Remove whole unrecognized sequence.  */
 			do {
 				--curr;
-			} while (linebuf[curr] != ESC);
+			} while (!IS_CSI_START(linebuf[curr]));
 			return 0;
 		}
 		a = AT_ANSI;	/* Will force re-AT_'ing around it.  */
 		w = 0;
 	}
-	else if (ctldisp == OPT_ONPLUS && ch == ESC)
+	else if (ctldisp == OPT_ONPLUS && IS_CSI_START(ch))
 	{
 		a = AT_ANSI;	/* Will force re-AT_'ing around it.  */
 		w = 0;
@@ -942,7 +942,7 @@ do_append(ch, rep, pos)
 	} else if ((!utf_mode || is_ascii_char(ch)) && control_char((char)ch))
 	{
 	do_control_char:
-		if (ctldisp == OPT_ON || (ctldisp == OPT_ONPLUS && ch == ESC))
+		if (ctldisp == OPT_ON || (ctldisp == OPT_ONPLUS && IS_CSI_START(ch)))
 		{
 			/*
 			 * Output as a normal character.
diff --git a/contrib/less/search.c b/contrib/less/search.c
index 380d278a4a49..6104964ef98d 100644
--- a/contrib/less/search.c
+++ b/contrib/less/search.c
@@ -15,6 +15,7 @@
 
 #include "less.h"
 #include "position.h"
+#include "charset.h"
 
 #define	MINPOS(a,b)	(((a) < (b)) ? (a) : (b))
 #define	MAXPOS(a,b)	(((a) > (b)) ? (a) : (b))
@@ -118,24 +119,31 @@ cvt_text(odst, osrc, lenp, ops)
 	int *lenp;
 	int ops;
 {
-	register char *dst;
-	register char *src;
+	char *dst;
+	char *src;
 	register char *src_end;
+	LWCHAR ch;
 
 	if (lenp != NULL)
 		src_end = osrc + *lenp;
 	else
 		src_end = osrc + strlen(osrc);
 
-	for (src = osrc, dst = odst;  src < src_end;  src++)
+	for (src = osrc, dst = odst;  src < src_end;  )
 	{
-		if ((ops & CVT_TO_LC) && IS_UPPER(*src))
+		ch = step_char(&src, +1, src_end);
+		if ((ops & CVT_TO_LC) && IS_UPPER(ch))
+		{
 			/* Convert uppercase to lowercase. */
-			*dst++ = TO_LOWER(*src);
-		else if ((ops & CVT_BS) && *src == '\b' && dst > odst)
+			put_wchar(&dst, TO_LOWER(ch));
+		} else if ((ops & CVT_BS) && ch == '\b' && dst > odst)
+		{
 			/* Delete BS and preceding char. */
-			dst--;
-		else if ((ops & CVT_ANSI) && *src == ESC)
+			do {
+				dst--;
+			} while (dst > odst &&
+				!IS_ASCII_OCTET(*dst) && !IS_UTF8_LEAD(*dst));
+		} else if ((ops & CVT_ANSI) && IS_CSI_START(ch))
 		{
 			/* Skip to end of ANSI escape sequence. */
 			while (src + 1 != src_end)
@@ -143,7 +151,7 @@ cvt_text(odst, osrc, lenp, ops)
 					break;
 		} else 
 			/* Just copy. */
-			*dst++ = *src;
+			put_wchar(&dst, ch);
 	}
 	if ((ops & CVT_CRLF) && dst > odst && dst[-1] == '\r')
 		dst--;
@@ -180,14 +188,18 @@ get_cvt_ops()
  * Are there any uppercase letters in this string?
  */
 	static int
-is_ucase(s)
-	char *s;
+is_ucase(str)
+	char *str;
 {
-	register char *p;
+	char *str_end = str + strlen(str);
+	LWCHAR ch;
 
-	for (p = s;  *p != '\0';  p++)
-		if (IS_UPPER(*p))
+	while (str < str_end)
+	{
+		ch = step_char(&str, +1, str_end);
+		if (IS_UPPER(ch))
 			return (1);
+	}
 	return (0);
 }
 
@@ -677,7 +689,7 @@ adj_hilite_ansi(cvt_ops, line, line_len, npos)
 	char *line_end = *line + line_len;
 
 	if (cvt_ops & CVT_ANSI)
-		while (**line == ESC)
+		while (IS_CSI_START(**line))
 		{
 			/*
 			 * Found an ESC.  The file position moves
diff --git a/contrib/less/signal.c b/contrib/less/signal.c
index c19d892b976d..ce3714c7061c 100644
--- a/contrib/less/signal.c
+++ b/contrib/less/signal.c
@@ -89,6 +89,8 @@ winch(type)
 {
 	LSIGNAL(SIGWINCH, winch);
 	sigs |= S_WINCH;
+	if (reading)
+		intread();
 }
 #else
 #ifdef SIGWIND
diff --git a/contrib/less/version.c b/contrib/less/version.c
index df74e04f2aa0..a4d7ea757cb6 100644
--- a/contrib/less/version.c
+++ b/contrib/less/version.c
@@ -693,6 +693,8 @@ v403  5/25/07	Fix Windows build.
 v404  6/5/07	Fix display bug with F command and long lines.
 v405  6/17/07	Fix display bug when using -w option.
 v406  6/17/07	Fix secure build.
+v407  8/16/07	Fix bugs; support CSI chars.
+v408  10/1/07	Fix bug in -i with non-ASCII chars.
 */
 
-char version[] = "406";
+char version[] = "408";