Replace less with the cleaned-up fork of less 458 maintained by Garrett

D'Amore at https://github.com/gdamore/less-fork. This has significantly
less portability goop, has a tidied up code style, uses terminfo instead
of termcap, and is has stricter POSIX compliance.

Many of our local changes have been accepted upstream: substantial
remaining local changes are code to read help files from /usr/share
rather than compiling them in, man page and help improvements, and some
tweaks to the default options.

Review and testing by millert, ok deraadt

1 files changed, 255 insertions, 408 deletions

diff --git a/usr.bin/less/line.c b/usr.bin/less/line.c
index 0517e23d85b..9638b2714ac 100644
--- a/usr.bin/less/line.c
+++ b/usr.bin/less/line.c
@@ -6,7 +6,10 @@
  *
  * For more information, see the README file.
  */
-
+/*
+ * Modified for use with illumos.
+ * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ */
 
 /*
  * Routines to manipulate the "line buffer".
@@ -17,34 +20,31 @@
 #include "less.h"
 #include "charset.h"
 
-#include <err.h>
-
 static char *linebuf = NULL;	/* Buffer which holds the current output line */
 static char *attr = NULL;	/* Extension of linebuf to hold attributes */
-public int size_linebuf = 0;	/* Size of line buffer (and attr buffer) */
+int size_linebuf = 0;		/* Size of line buffer (and attr buffer) */
 
 static int cshift;		/* Current left-shift of output line buffer */
-public int hshift;		/* Desired left-shift of output line buffer */
-public int tabstops[TABSTOP_MAX] = { 0 }; /* Custom tabstops */
-public int ntabstops = 1;	/* Number of tabstops */
-public int tabdefault = 8;	/* Default repeated tabstops */
-public POSITION highest_hilite;	/* Pos of last hilite in file found so far */
+int hshift;			/* Desired left-shift of output line buffer */
+int tabstops[TABSTOP_MAX] = { 0 }; /* Custom tabstops */
+int ntabstops = 1;		/* Number of tabstops */
+int tabdefault = 8;		/* Default repeated tabstops */
+off_t highest_hilite;		/* Pos of last hilite in file found so far */
 
 static int curr;		/* Index into linebuf */
-static int column;		/* Printable length, accounting for
-				   backspaces, etc. */
+static int column;	/* Printable length, accounting for backspaces, etc. */
 static int overstrike;		/* Next char should overstrike previous char */
 static int last_overstrike = AT_NORMAL;
 static int is_null_line;	/* There is no current line */
 static int lmargin;		/* Left margin */
 static char pendc;
-static POSITION pendpos;
+static off_t pendpos;
 static char *end_ansi_chars;
 static char *mid_ansi_chars;
 
-static int attr_swidth();
-static int attr_ewidth();
-static int do_append();
+static int attr_swidth(int);
+static int attr_ewidth(int);
+static int do_append(LWCHAR, char *, off_t);
 
 extern volatile sig_atomic_t sigs;
 extern int bs_mode;
@@ -60,19 +60,19 @@ extern int bl_s_width, bl_e_width;
 extern int so_s_width, so_e_width;
 extern int sc_width, sc_height;
 extern int utf_mode;
-extern POSITION start_attnpos;
-extern POSITION end_attnpos;
+extern off_t start_attnpos;
+extern off_t end_attnpos;
 
 static char mbc_buf[MAX_UTF_CHAR_LEN];
 static int mbc_buf_len = 0;
 static int mbc_buf_index = 0;
-static POSITION mbc_pos;
+static off_t mbc_pos;
 
 /*
  * Initialize from environment variables.
  */
-	public void
-init_line()
+void
+init_line(void)
 {
 	end_ansi_chars = lgetenv("LESSANSIENDCHARS");
 	if (end_ansi_chars == NULL || *end_ansi_chars == '\0')
@@ -82,52 +82,41 @@ init_line()
 	if (mid_ansi_chars == NULL || *mid_ansi_chars == '\0')
 		mid_ansi_chars = "0123456789;[?!\"'#%()*+ ";
 
-	linebuf = (char *) ecalloc(LINEBUF_SIZE, sizeof(char));
-	attr = (char *) ecalloc(LINEBUF_SIZE, sizeof(char));
+	linebuf = ecalloc(LINEBUF_SIZE, sizeof (char));
+	attr = ecalloc(LINEBUF_SIZE, sizeof (char));
 	size_linebuf = LINEBUF_SIZE;
 }
 
 /*
  * Expand the line buffer.
  */
-	static int
-expand_linebuf()
+static int
+expand_linebuf(void)
 {
 	/* Double the size of the line buffer. */
 	int new_size = size_linebuf * 2;
 
 	/* Just realloc to expand the buffer, if we can. */
-	char *new_buf;
-	char *new_attr;
-
-	new_buf = realloc(linebuf, new_size);
-	if (new_buf == NULL)
-		return 1;
-	new_attr = realloc(attr, new_size);
-	if (new_attr == NULL) {
-		/* realloc linebuf back to original size */
-		linebuf = realloc(new_buf, size_linebuf);
-		if (linebuf == NULL)
-			err(1, NULL);
-		return 1;
+	char *new_buf = realloc(linebuf, new_size);
+	char *new_attr = realloc(attr, new_size);
+	if (new_buf == NULL || new_attr == NULL) {
+		if (new_attr != NULL)
+			free(new_attr);
+		if (new_buf != NULL)
+			free(new_buf);
+		return (1);
 	}
-	/*
-	 * We realloc'd the buffers; they already have the old contents.
-	 */
-	memset(new_buf + size_linebuf, 0, new_size - size_linebuf);
-	memset(new_attr + size_linebuf, 0, new_size - size_linebuf);
 	linebuf = new_buf;
 	attr = new_attr;
 	size_linebuf = new_size;
-	return 0;
+	return (0);
 }
 
 /*
  * Is a character ASCII?
  */
-	public int
-is_ascii_char(ch)
-	LWCHAR ch;
+int
+is_ascii_char(LWCHAR ch)
 {
 	return (ch <= 0x7F);
 }
@@ -135,8 +124,8 @@ is_ascii_char(ch)
 /*
  * Rewind the line buffer.
  */
-	public void
-prewind()
+void
+prewind(void)
 {
 	curr = 0;
 	column = 0;
@@ -154,19 +143,17 @@ prewind()
 /*
  * Insert the line number (of the given position) into the line buffer.
  */
-	public void
-plinenum(pos)
-	POSITION pos;
+void
+plinenum(off_t pos)
 {
-	register LINENUM linenum = 0;
-	register int i;
+	LINENUM linenum = 0;
+	int i;
 
-	if (linenums == OPT_ONPLUS)
-	{
+	if (linenums == OPT_ONPLUS) {
 		/*
 		 * Get the line number and put it in the current line.
 		 * {{ Note: since find_linenum calls forw_raw_line,
-		 *    it may seek in the input file, requiring the caller 
+		 *    it may seek in the input file, requiring the caller
 		 *    of plinenum to re-seek if necessary. }}
 		 * {{ Since forw_raw_line modifies linebuf, we must
 		 *    do this first, before storing anything in linebuf. }}
@@ -177,10 +164,9 @@ plinenum(pos)
 	/*
 	 * Display a status column if the -J option is set.
 	 */
-	if (status_col)
-	{
+	if (status_col) {
 		linebuf[curr] = ' ';
-		if (start_attnpos != NULL_POSITION &&
+		if (start_attnpos != -1 &&
 		    pos >= start_attnpos && pos < end_attnpos)
 			attr[curr] = AT_NORMAL|AT_HILITE;
 		else
@@ -192,12 +178,11 @@ plinenum(pos)
 	 * Display the line number at the start of each line
 	 * if the -N option is set.
 	 */
-	if (linenums == OPT_ONPLUS)
-	{
+	if (linenums == OPT_ONPLUS) {
 		char buf[INT_STRLEN_BOUND(pos) + 2];
 		int n;
 
-		linenumtoa(linenum, buf, sizeof(buf));
+		linenumtoa(linenum, buf, sizeof (buf));
 		n = strlen(buf);
 		if (n < MIN_LINENUM_WIDTH)
 			n = MIN_LINENUM_WIDTH;
@@ -213,8 +198,7 @@ plinenum(pos)
 	/*
 	 * Append enough spaces to bring us to the lmargin.
 	 */
-	while (column < lmargin)
-	{
+	while (column < lmargin) {
 		linebuf[curr] = ' ';
 		attr[curr++] = AT_NORMAL;
 		column++;
@@ -225,9 +209,8 @@ plinenum(pos)
  * Shift the input line left.
  * This means discarding N printable chars at the start of the buffer.
  */
-	static void
-pshift(shift)
-	int shift;
+static void
+pshift(int shift)
 {
 	LWCHAR prev_ch = 0;
 	unsigned char c;
@@ -249,29 +232,24 @@ pshift(shift)
 	 * We keep on going when shifted == shift
 	 * to get all combining chars.
 	 */
-	while (shifted <= shift && from < curr)
-	{
+	while (shifted <= shift && from < curr) {
 		c = linebuf[from];
-		if (ctldisp == OPT_ONPLUS && IS_CSI_START(c))
-		{
+		if (ctldisp == OPT_ONPLUS && IS_CSI_START(c)) {
 			/* Keep cumulative effect.  */
 			linebuf[to] = c;
 			attr[to++] = attr[from++];
-			while (from < curr && linebuf[from])
-			{
+			while (from < curr && linebuf[from]) {
 				linebuf[to] = linebuf[from];
 				attr[to++] = attr[from];
 				if (!is_ansi_middle(linebuf[from++]))
 					break;
-			} 
+			}
 			continue;
 		}
 
 		width = 0;
 
-#if !SMALL
-		if (!IS_ASCII_OCTET(c) && utf_mode)
-		{
+		if (!IS_ASCII_OCTET(c) && utf_mode) {
 			/* Assumes well-formedness validation already done.  */
 			LWCHAR ch;
 
@@ -279,20 +257,16 @@ pshift(shift)
 			if (from + len > curr)
 				break;
 			ch = get_wchar(linebuf + from);
-			if (!is_composing_char(ch) && !is_combining_char(prev_ch, ch))
+			if (!is_composing_char(ch) &&
+			    !is_combining_char(prev_ch, ch))
 				width = is_wide_char(ch) ? 2 : 1;
 			prev_ch = ch;
-		} else
-#endif /* !SMALL */
-		{
+		} else {
 			len = 1;
 			if (c == '\b')
 				/* XXX - Incorrect if several '\b' in a row.  */
-#if !SMALL
-				width = (utf_mode && is_wide_char(prev_ch)) ? -2 : -1;
-#else
-				width = -1;
-#endif /* !SMALL */
+				width = (utf_mode && is_wide_char(prev_ch)) ?
+				    -2 : -1;
 			else if (!control_char(c))
 				width = 1;
 			prev_ch = 0;
@@ -315,14 +289,12 @@ pshift(shift)
 		/* Adjust width for magic cookies. */
 		prev_attr = (to > 0) ? attr[to-1] : AT_NORMAL;
 		next_attr = (from + len < curr) ? attr[from + len] : prev_attr;
-		if (!is_at_equiv(attr[from], prev_attr) && 
-			!is_at_equiv(attr[from], next_attr))
-		{
+		if (!is_at_equiv(attr[from], prev_attr) &&
+		    !is_at_equiv(attr[from], next_attr)) {
 			width += attr_swidth(attr[from]);
 			if (from + len < curr)
 				width += attr_ewidth(attr[from]);
-			if (is_at_equiv(prev_attr, next_attr))
-			{
+			if (is_at_equiv(prev_attr, next_attr)) {
 				width += attr_ewidth(prev_attr);
 				if (from + len < curr)
 					width += attr_swidth(next_attr);
@@ -336,8 +308,7 @@ pshift(shift)
 		if (shifted < 0)
 			shifted = 0;
 	}
-	while (from < curr)
-	{
+	while (from < curr) {
 		linebuf[to] = linebuf[from];
 		attr[to++] = attr[from++];
 	}
@@ -349,8 +320,8 @@ pshift(shift)
 /*
  *
  */
-	public void
-pshift_all()
+void
+pshift_all(void)
 {
 	pshift(column);
 }
@@ -359,9 +330,8 @@ pshift_all()
  * Return the printing width of the start (enter) sequence
  * for a given character attribute.
  */
-	static int
-attr_swidth(a)
-	int a;
+static int
+attr_swidth(int a)
 {
 	int w = 0;
 
@@ -376,16 +346,15 @@ attr_swidth(a)
 	if (a & AT_STANDOUT)
 		w += so_s_width;
 
-	return w;
+	return (w);
 }
 
 /*
  * Return the printing width of the end (exit) sequence
  * for a given character attribute.
  */
-	static int
-attr_ewidth(a)
-	int a;
+static int
+attr_ewidth(int a)
 {
 	int w = 0;
 
@@ -400,7 +369,7 @@ attr_ewidth(a)
 	if (a & AT_STANDOUT)
 		w += so_e_width;
 
-	return w;
+	return (w);
 }
 
 /*
@@ -409,11 +378,8 @@ attr_ewidth(a)
  * Adding a character with a given attribute may cause an enter or exit
  * attribute sequence to be inserted, so this must be taken into account.
  */
-	static int
-pwidth(ch, a, prev_ch)
-	LWCHAR ch;
-	int a;
-	LWCHAR prev_ch;
+static int
+pwidth(LWCHAR ch, int a, LWCHAR prev_ch)
 {
 	int w;
 
@@ -422,16 +388,10 @@ pwidth(ch, a, prev_ch)
 		 * Backspace moves backwards one or two positions.
 		 * XXX - Incorrect if several '\b' in a row.
 		 */
-#if !SMALL
-		return (utf_mode && is_wide_char(prev_ch)) ? -2 : -1;
-#else
-		return -1;
-#endif /* !SMALL */
-
-	if (!utf_mode || is_ascii_char(ch))
-	{
-		if (control_char((char)ch))
-		{
+		return ((utf_mode && is_wide_char(prev_ch)) ? -2 : -1);
+
+	if (!utf_mode || is_ascii_char(ch)) {
+		if (control_char((char)ch)) {
 			/*
 			 * Control characters do unpredictable things,
 			 * so we don't even try to guess; say it doesn't move.
@@ -439,12 +399,8 @@ pwidth(ch, a, prev_ch)
 			 */
 			return (0);
 		}
-	}
-#if !SMALL
-	else
-	{
-		if (is_composing_char(ch) || is_combining_char(prev_ch, ch))
-		{
+	} else {
+		if (is_composing_char(ch) || is_combining_char(prev_ch, ch)) {
 			/*
 			 * Composing and combining chars take up no space.
 			 *
@@ -459,17 +415,14 @@ pwidth(ch, a, prev_ch)
 			return (0);
 		}
 	}
-#endif /* !SMALL */
 
 	/*
 	 * Other characters take one or two columns,
 	 * plus the width of any attribute enter/exit sequence.
 	 */
 	w = 1;
-#if !SMALL
 	if (is_wide_char(ch))
 		w++;
-#endif /* !SMALL */
 	if (curr > 0 && !is_at_equiv(attr[curr-1], a))
 		w += attr_ewidth(attr[curr-1]);
 	if ((apply_at_specials(a) != AT_NORMAL) &&
@@ -482,8 +435,8 @@ pwidth(ch, a, prev_ch)
  * Delete to the previous base character in the line buffer.
  * Return 1 if one is found.
  */
-	static int
-backc()
+static int
+backc(void)
 {
 	LWCHAR prev_ch;
 	char *p = linebuf + curr;
@@ -491,27 +444,25 @@ backc()
 	int width;
 
 	/* This assumes that there is no '\b' in linebuf.  */
-	while (   curr > lmargin
-	       && column > lmargin
-	       && (!(attr[curr - 1] & (AT_ANSI|AT_BINARY))))
-	{
+	while (curr > lmargin && column > lmargin &&
+	    (!(attr[curr - 1] & (AT_ANSI|AT_BINARY)))) {
 		curr = p - linebuf;
 		prev_ch = step_char(&p, -1, linebuf + lmargin);
 		width = pwidth(ch, attr[curr], prev_ch);
 		column -= width;
 		if (width > 0)
-			return 1;
+			return (1);
 		ch = prev_ch;
 	}
 
-	return 0;
+	return (0);
 }
 
 /*
  * Are we currently within a recognized ANSI escape sequence?
  */
-	static int
-in_ansi_esc_seq()
+static int
+in_ansi_esc_seq(void)
 {
 	char *p;
 
@@ -519,8 +470,7 @@ in_ansi_esc_seq()
 	 * Search backwards for either an ESC (which means we ARE in a seq);
 	 * or an end char (which means we're NOT in a seq).
 	 */
-	for (p = &linebuf[curr];  p > linebuf; )
-	{
+	for (p = &linebuf[curr];  p > linebuf; ) {
 		LWCHAR ch = step_char(&p, -1, linebuf);
 		if (IS_CSI_START(ch))
 			return (1);
@@ -533,74 +483,59 @@ in_ansi_esc_seq()
 /*
  * Is a character the end of an ANSI escape sequence?
  */
-	public int
-is_ansi_end(ch)
-	LWCHAR ch;
+int
+is_ansi_end(LWCHAR ch)
 {
 	if (!is_ascii_char(ch))
 		return (0);
-	return (strchr(end_ansi_chars, (char) ch) != NULL);
+	return (strchr(end_ansi_chars, (char)ch) != NULL);
 }
 
 /*
  *
  */
-	public int
-is_ansi_middle(ch)
-	LWCHAR ch;
+int
+is_ansi_middle(LWCHAR ch)
 {
 	if (!is_ascii_char(ch))
 		return (0);
 	if (is_ansi_end(ch))
 		return (0);
-	return (strchr(mid_ansi_chars, (char) ch) != NULL);
+	return (strchr(mid_ansi_chars, (char)ch) != NULL);
 }
 
 /*
  * Append a character and attribute to the line buffer.
  */
-#define	STORE_CHAR(ch,a,rep,pos) \
-	do { \
-		if (store_char((ch),(a),(rep),(pos))) return (1); \
-	} while (0)
-
-	static int
-store_char(ch, a, rep, pos)
-	LWCHAR ch;
-	int a;
-	char *rep;
-	POSITION pos;
+#define	STORE_CHAR(ch, a, rep, pos)				\
+		if (store_char((ch), (a), (rep), (pos)))	\
+			return (1)
+
+static int
+store_char(LWCHAR ch, char a, char *rep, off_t pos)
 {
 	int w;
 	int replen;
 	char cs;
+	int matches;
 
 	w = (a & (AT_UNDERLINE|AT_BOLD));	/* Pre-use w.  */
 	if (w != AT_NORMAL)
 		last_overstrike = w;
 
-#if HILITE_SEARCH
-	{
-		int matches;
-		if (is_hilited(pos, pos+1, 0, &matches))
-		{
-			/*
-			 * This character should be highlighted.
-			 * Override the attribute passed in.
-			 */
-			if (a != AT_ANSI)
-			{
-				if (highest_hilite != NULL_POSITION &&
-				    pos > highest_hilite)
-				    	highest_hilite = pos;
-				a |= AT_HILITE;
-			}
+	if (is_hilited(pos, pos+1, 0, &matches)) {
+		/*
+		 * This character should be highlighted.
+		 * Override the attribute passed in.
+		 */
+		if (a != AT_ANSI) {
+			if (highest_hilite != -1 && pos > highest_hilite)
+				highest_hilite = pos;
+			a |= AT_HILITE;
 		}
 	}
-#endif
 
-	if (ctldisp == OPT_ONPLUS && in_ansi_esc_seq())
-	{
+	if (ctldisp == OPT_ONPLUS && in_ansi_esc_seq()) {
 		if (!is_ansi_end(ch) && !is_ansi_middle(ch)) {
 			/* Remove whole unrecognized sequence.  */
 			char *p = &linebuf[curr];
@@ -609,18 +544,14 @@ store_char(ch, a, rep, pos)
 				bch = step_char(&p, -1, linebuf);
 			} while (p > linebuf && !IS_CSI_START(bch));
 			curr = p - linebuf;
-			return 0;
+			return (0);
 		}
 		a = AT_ANSI;	/* Will force re-AT_'ing around it.  */
 		w = 0;
-	}
-	else if (ctldisp == OPT_ONPLUS && IS_CSI_START(ch))
-	{
+	} else if (ctldisp == OPT_ONPLUS && IS_CSI_START(ch)) {
 		a = AT_ANSI;	/* Will force re-AT_'ing around it.  */
 		w = 0;
-	}
-	else
-	{
+	} else {
 		char *p = &linebuf[curr];
 		LWCHAR prev_ch = step_char(&p, -1, linebuf);
 		w = pwidth(ch, a, prev_ch);
@@ -632,21 +563,14 @@ store_char(ch, a, rep, pos)
 		 */
 		return (1);
 
-	if (rep == NULL)
-	{
-		cs = (char) ch;
+	if (rep == NULL) {
+		cs = (char)ch;
 		rep = &cs;
 		replen = 1;
-	} else
-	{
-#if !SMALL
+	} else {
 		replen = utf_len(rep[0]);
-#else
-		replen = 1;
-#endif /* !SMALL */
 	}
-	if (curr + replen >= size_linebuf-6)
-	{
+	if (curr + replen >= size_linebuf-6) {
 		/*
 		 * Won't fit in line buffer.
 		 * Try to expand it.
@@ -655,8 +579,7 @@ store_char(ch, a, rep, pos)
 			return (1);
 	}
 
-	while (replen-- > 0)
-	{
+	while (replen-- > 0) {
 		linebuf[curr] = *rep++;
 		attr[curr] = a;
 		curr++;
@@ -669,44 +592,42 @@ store_char(ch, a, rep, pos)
  * Append a tab to the line buffer.
  * Store spaces to represent the tab.
  */
-#define	STORE_TAB(a,pos) \
-	do { if (store_tab((a),(pos))) return (1); } while (0)
+#define	STORE_TAB(a, pos)		\
+	if (store_tab((a), (pos)))	\
+		return (1)
 
-	static int
-store_tab(attr, pos)
-	int attr;
-	POSITION pos;
+static int
+store_tab(int attr, off_t pos)
 {
 	int to_tab = column + cshift - lmargin;
 	int i;
 
 	if (ntabstops < 2 || to_tab >= tabstops[ntabstops-1])
 		to_tab = tabdefault -
-		     ((to_tab - tabstops[ntabstops-1]) % tabdefault);
-	else
-	{
+		    ((to_tab - tabstops[ntabstops-1]) % tabdefault);
+	else {
 		for (i = ntabstops - 2;  i >= 0;  i--)
 			if (to_tab >= tabstops[i])
 				break;
 		to_tab = tabstops[i+1] - to_tab;
 	}
 
-	if (column + to_tab - 1 + pwidth(' ', attr, 0) + attr_ewidth(attr) > sc_width)
-		return 1;
+	if (column + to_tab - 1 + pwidth(' ', attr, 0) +
+	    attr_ewidth(attr) > sc_width)
+		return (1);
 
 	do {
 		STORE_CHAR(' ', attr, " ", pos);
 	} while (--to_tab > 0);
-	return 0;
+	return (0);
 }
 
-#define STORE_PRCHAR(c, pos) \
-	do { if (store_prchar((c), (pos))) return 1; } while (0)
+#define	STORE_PRCHAR(c, pos)		\
+	if (store_prchar((c), (pos)))	\
+		return (1)
 
-	static int
-store_prchar(c, pos)
-	char c;
-	POSITION pos;
+static int
+store_prchar(char c, off_t pos)
 {
 	char *s;
 
@@ -719,45 +640,39 @@ store_prchar(c, pos)
 	 * Make sure we can get the entire representation
 	 * of the character on this line.
 	 */
-	if (column + (int) strlen(s) - 1 +
-            pwidth(' ', binattr, 0) + attr_ewidth(binattr) > sc_width)
-		return 1;
+	if (column + (int)strlen(s) - 1 +
+	    pwidth(' ', binattr, 0) + attr_ewidth(binattr) > sc_width)
+		return (1);
 
-	for ( ;  *s != 0;  s++)
+	for (; *s != 0; s++) {
 		STORE_CHAR(*s, AT_BINARY, NULL, pos);
-
-	return 0;
+	}
+	return (0);
 }
 
-#if !SMALL
-	static int
-flush_mbc_buf(pos)
-	POSITION pos;
+static int
+flush_mbc_buf(off_t pos)
 {
 	int i;
 
 	for (i = 0; i < mbc_buf_index; i++)
 		if (store_prchar(mbc_buf[i], pos))
-			return mbc_buf_index - i;
+			return (mbc_buf_index - i);
 
-	return 0;
+	return (0);
 }
-#endif /* !SMALL */
 
 /*
  * Append a character to the line buffer.
  * Expand tabs into spaces, handle underlining, boldfacing, etc.
  * Returns 0 if ok, 1 if couldn't fit in buffer.
  */
-	public int
-pappend(c, pos)
-	char c;
-	POSITION pos;
+int
+pappend(char c, off_t pos)
 {
 	int r;
 
-	if (pendc)
-	{
+	if (pendc) {
 		if (do_append(pendc, NULL, pendpos))
 			/*
 			 * Oops.  We've probably lost the char which
@@ -767,11 +682,8 @@ pappend(c, pos)
 		pendc = '\0';
 	}
 
-	if (c == '\r' && bs_mode == BS_SPECIAL)
-	{
-#if !SMALL
-		if (mbc_buf_len > 0)  /* utf_mode must be on. */
-		{
+	if (c == '\r' && bs_mode == BS_SPECIAL) {
+		if (mbc_buf_len > 0)  /* utf_mode must be on. */ {
 			/* Flush incomplete (truncated) sequence. */
 			r = flush_mbc_buf(mbc_pos);
 			mbc_buf_index = r + 1;
@@ -779,10 +691,9 @@ pappend(c, pos)
 			if (r)
 				return (mbc_buf_index);
 		}
-#endif /* !SMALL */
 
 		/*
-		 * Don't put the CR into the buffer until we see 
+		 * Don't put the CR into the buffer until we see
 		 * the next char.  If the next char is a newline,
 		 * discard the CR.
 		 */
@@ -791,42 +702,36 @@ pappend(c, pos)
 		return (0);
 	}
 
-	if (!utf_mode)
-	{
+	if (!utf_mode) {
 		r = do_append((LWCHAR) c, NULL, pos);
-	}
-#if !SMALL
-	else
-	{
+	} else {
 		/* Perform strict validation in all possible cases. */
-		if (mbc_buf_len == 0)
-		{
-		retry:
+		if (mbc_buf_len == 0) {
+retry:
 			mbc_buf_index = 1;
 			*mbc_buf = c;
-			if (IS_ASCII_OCTET(c))
+			if (IS_ASCII_OCTET(c)) {
 				r = do_append((LWCHAR) c, NULL, pos);
-			else if (IS_UTF8_LEAD(c))
-			{
+			} else if (IS_UTF8_LEAD(c)) {
 				mbc_buf_len = utf_len(c);
 				mbc_pos = pos;
 				return (0);
-			} else
+			} else {
 				/* UTF8_INVALID or stray UTF8_TRAIL */
 				r = flush_mbc_buf(pos);
-		} else if (IS_UTF8_TRAIL(c))
-		{
+			}
+		} else if (IS_UTF8_TRAIL(c)) {
 			mbc_buf[mbc_buf_index++] = c;
 			if (mbc_buf_index < mbc_buf_len)
 				return (0);
 			if (is_utf8_well_formed(mbc_buf))
-				r = do_append(get_wchar(mbc_buf), mbc_buf, mbc_pos);
+				r = do_append(get_wchar(mbc_buf), mbc_buf,
+				    mbc_pos);
 			else
 				/* Complete, but not shortest form, sequence. */
 				mbc_buf_index = r = flush_mbc_buf(mbc_pos);
 			mbc_buf_len = 0;
-		} else
-		{
+		} else {
 			/* Flush incomplete (truncated) sequence.  */
 			r = flush_mbc_buf(mbc_pos);
 			mbc_buf_index = r + 1;
@@ -834,9 +739,8 @@ pappend(c, pos)
 			/* Handle new char.  */
 			if (!r)
 				goto retry;
- 		}
+		}
 	}
-#endif /* !SMALL */
 
 	/*
 	 * If we need to shift the line, do it.
@@ -844,32 +748,26 @@ pappend(c, pos)
 	 * so shifting it doesn't affect the chars we're currently
 	 * pappending.  (Bold & underline can get messed up otherwise.)
 	 */
-	if (cshift < hshift && column > sc_width / 2)
-	{
+	if (cshift < hshift && column > sc_width / 2) {
 		linebuf[curr] = '\0';
 		pshift(hshift - cshift);
 	}
-	if (r)
-	{
+	if (r) {
 		/* How many chars should caller back up? */
 		r = (!utf_mode) ? 1 : mbc_buf_index;
 	}
 	return (r);
 }
 
-	static int
-do_append(ch, rep, pos)
-	LWCHAR ch;
-	char *rep;
-	POSITION pos;
+static int
+do_append(LWCHAR ch, char *rep, off_t pos)
 {
-	register int a;
+	int a;
 	LWCHAR prev_ch;
 
 	a = AT_NORMAL;
 
-	if (ch == '\b')
-	{
+	if (ch == '\b') {
 		if (bs_mode == BS_CONTROL)
 			goto do_control_char;
 
@@ -878,37 +776,32 @@ do_append(ch, rep, pos)
 		 * backspace over part of the printed
 		 * representation of a binary character.
 		 */
-		if (   curr <= lmargin
-		    || column <= lmargin
-		    || (attr[curr - 1] & (AT_ANSI|AT_BINARY)))
+		if (curr <= lmargin ||
+		    column <= lmargin ||
+		    (attr[curr - 1] & (AT_ANSI|AT_BINARY))) {
 			STORE_PRCHAR('\b', pos);
-		else if (bs_mode == BS_NORMAL)
+		} else if (bs_mode == BS_NORMAL) {
 			STORE_CHAR(ch, AT_NORMAL, NULL, pos);
-		else if (bs_mode == BS_SPECIAL)
+		} else if (bs_mode == BS_SPECIAL) {
 			overstrike = backc();
+		}
 
-		return 0;
+		return (0);
 	}
 
-	if (overstrike > 0)
-	{
+	if (overstrike > 0) {
 		/*
 		 * Overstrike the character at the current position
-		 * in the line buffer.  This will cause either 
-		 * underline (if a "_" is overstruck), 
+		 * in the line buffer.  This will cause either
+		 * underline (if a "_" is overstruck),
 		 * bold (if an identical character is overstruck),
 		 * or just deletion of the character in the buffer.
 		 */
 		overstrike = utf_mode ? -1 : 0;
 		/* To be correct, this must be a base character.  */
-#if !SMALL
 		prev_ch = get_wchar(linebuf + curr);
-#else
-		prev_ch = (LWCHAR)((char)(linebuf + curr)[0] & 0xFF);
-#endif /* !SMALL */
 		a = attr[curr];
-		if (ch == prev_ch)
-		{
+		if (ch == prev_ch) {
 			/*
 			 * Overstriking a char with itself means make it bold.
 			 * But overstriking an underscore with itself is
@@ -916,45 +809,38 @@ do_append(ch, rep, pos)
 			 * it could mean make it underlined.
 			 * Use the previous overstrike to resolve it.
 			 */
-			if (ch == '_')
-			{
+			if (ch == '_') {
 				if ((a & (AT_BOLD|AT_UNDERLINE)) != AT_NORMAL)
 					a |= (AT_BOLD|AT_UNDERLINE);
 				else if (last_overstrike != AT_NORMAL)
 					a |= last_overstrike;
 				else
 					a |= AT_BOLD;
-			} else
+			} else {
 				a |= AT_BOLD;
-		} else if (ch == '_')
-		{
+			}
+		} else if (ch == '_') {
 			a |= AT_UNDERLINE;
 			ch = prev_ch;
 			rep = linebuf + curr;
-		} else if (prev_ch == '_')
-		{
+		} else if (prev_ch == '_') {
 			a |= AT_UNDERLINE;
 		}
 		/* Else we replace prev_ch, but we keep its attributes.  */
-	} else if (overstrike < 0)
-	{
-#if !SMALL
-		if (   is_composing_char(ch)
-		    || is_combining_char(get_wchar(linebuf + curr), ch))
+	} else if (overstrike < 0) {
+		if (is_composing_char(ch) ||
+		    is_combining_char(get_wchar(linebuf + curr), ch))
 			/* Continuation of the same overstrike.  */
 			a = last_overstrike;
 		else
-#endif /* !SMALL */
 			overstrike = 0;
 	}
 
-	if (ch == '\t') 
-	{
+	if (ch == '\t') {
 		/*
 		 * Expand a tab into spaces.
 		 */
-		switch (bs_mode)
-		{
+		switch (bs_mode) {
 		case BS_CONTROL:
 			goto do_control_char;
 		case BS_NORMAL:
@@ -962,68 +848,55 @@ do_append(ch, rep, pos)
 			STORE_TAB(a, pos);
 			break;
 		}
-	} else if ((!utf_mode || is_ascii_char(ch)) && control_char((char)ch))
-	{
-	do_control_char:
-		if (ctldisp == OPT_ON || (ctldisp == OPT_ONPLUS && IS_CSI_START(ch)))
-		{
+	} else if ((!utf_mode || is_ascii_char(ch)) && control_char((char)ch)) {
+do_control_char:
+		if (ctldisp == OPT_ON ||
+		    (ctldisp == OPT_ONPLUS && IS_CSI_START(ch))) {
 			/*
 			 * Output as a normal character.
 			 */
 			STORE_CHAR(ch, AT_NORMAL, rep, pos);
-		} else 
-		{
-			STORE_PRCHAR((char) ch, pos);
+		} else {
+			STORE_PRCHAR((char)ch, pos);
 		}
-	}
-#if !SMALL
-	else if (utf_mode && ctldisp != OPT_ON && is_ubin_char(ch))
-	{
+	} else if (utf_mode && ctldisp != OPT_ON && is_ubin_char(ch)) {
 		char *s;
 
 		s = prutfchar(ch);
 
-		if (column + (int) strlen(s) - 1 +
+		if (column + (int)strlen(s) - 1 +
 		    pwidth(' ', binattr, 0) + attr_ewidth(binattr) > sc_width)
 			return (1);
 
-		for ( ;  *s != 0;  s++)
+		for (; *s != 0; s++)
 			STORE_CHAR(*s, AT_BINARY, NULL, pos);
- 	}
-#endif /* !SMALL */
-	else
-	{
+	} else {
 		STORE_CHAR(ch, a, rep, pos);
 	}
- 	return (0);
+	return (0);
 }
 
 /*
  *
  */
-	public int
-pflushmbc()
+int
+pflushmbc(void)
 {
 	int r = 0;
 
-#if !SMALL
-	if (mbc_buf_len > 0)
-	{
+	if (mbc_buf_len > 0) {
 		/* Flush incomplete (truncated) sequence.  */
 		r = flush_mbc_buf(mbc_pos);
 		mbc_buf_len = 0;
 	}
-#endif /* !SMALL */
-	return r;
+	return (r);
 }
 
 /*
  * Terminate the line in the line buffer.
  */
-	public void
-pdone(endline, forw)
-	int endline;
-	int forw;
+void
+pdone(int endline, int forw)
 {
 	(void) pflushmbc();
 
@@ -1041,12 +914,10 @@ pdone(endline, forw)
 	if (cshift < hshift)
 		pshift(hshift - cshift);
 
-	if (ctldisp == OPT_ONPLUS && is_ansi_end('m'))
-	{
+	if (ctldisp == OPT_ONPLUS && is_ansi_end('m')) {
 		/* Switch to normal attribute at end of line. */
 		char *p = "\033[m";
-		for ( ;  *p != '\0';  p++)
-		{
+		for (; *p != '\0'; p++) {
 			linebuf[curr] = *p;
 			attr[curr++] = AT_ANSI;
 		}
@@ -1059,20 +930,18 @@ pdone(endline, forw)
 	 * or if the terminal doesn't auto wrap,
 	 * or if this is really the end of the line AND the terminal ignores
 	 * a newline at the right edge.
-	 * (In the last case we don't want to output a newline if the terminal 
+	 * (In the last case we don't want to output a newline if the terminal
 	 * doesn't ignore it since that would produce an extra blank line.
 	 * But we do want to output a newline if the terminal ignores it in case
 	 * the next line is blank.  In that case the single newline output for
 	 * that blank line would be ignored!)
 	 */
-	if (column < sc_width || !auto_wrap || (endline && ignaw) || ctldisp == OPT_ON)
-	{
+	if (column < sc_width || !auto_wrap || (endline && ignaw) ||
+	    ctldisp == OPT_ON) {
 		linebuf[curr] = '\n';
 		attr[curr] = AT_NORMAL;
 		curr++;
-	} 
-	else if (ignaw && column >= sc_width && forw)
-	{
+	} else if (ignaw && column >= sc_width && forw) {
 		/*
 		 * Terminals with "ignaw" don't wrap until they *really* need
 		 * to, i.e. when the character *after* the last one to fit on a
@@ -1080,16 +949,16 @@ pdone(endline, forw)
 		 * get in the state where a full screen width of characters
 		 * have been output but the cursor is sitting on the right edge
 		 * instead of at the start of the next line.
-		 * So we nudge them into wrapping by outputting a space 
-		 * character plus a backspace.  But do this only if moving 
+		 * So we nudge them into wrapping by outputting a space
+		 * character plus a backspace.  But do this only if moving
 		 * forward; if we're moving backward and drawing this line at
 		 * the top of the screen, the space would overwrite the first
-		 * char on the next line.  We don't need to do this "nudge" 
+		 * char on the next line.  We don't need to do this "nudge"
 		 * at the top of the screen anyway.
 		 */
 		linebuf[curr] = ' ';
 		attr[curr++] = AT_NORMAL;
-		linebuf[curr] = '\b'; 
+		linebuf[curr] = '\b';
 		attr[curr++] = AT_NORMAL;
 	}
 	linebuf[curr] = '\0';
@@ -1099,9 +968,8 @@ pdone(endline, forw)
 /*
  *
  */
-	public void
-set_status_col(c)
-	char c;
+void
+set_status_col(char c)
 {
 	linebuf[0] = c;
 	attr[0] = AT_NORMAL|AT_HILITE;
@@ -1112,29 +980,24 @@ set_status_col(c)
  * Return the character as the function return value,
  * and the character attribute in *ap.
  */
-	public int
-gline(i, ap)
-	register int i;
-	register int *ap;
+int
+gline(int i, int *ap)
 {
-	if (is_null_line)
-	{
+	if (is_null_line) {
 		/*
 		 * If there is no current line, we pretend the line is
 		 * either "~" or "", depending on the "twiddle" flag.
 		 */
-		if (twiddle)
-		{
-			if (i == 0)
-			{
+		if (twiddle) {
+			if (i == 0) {
 				*ap = AT_BOLD;
-				return '~';
+				return ('~');
 			}
 			--i;
 		}
 		/* Make sure we're back to AT_NORMAL before the '\n'.  */
 		*ap = AT_NORMAL;
-		return i ? '\0' : '\n';
+		return (i ? '\0' : '\n');
 	}
 
 	*ap = attr[i];
@@ -1144,8 +1007,8 @@ gline(i, ap)
 /*
  * Indicate that there is no current line.
  */
-	public void
-null_line()
+void
+null_line(void)
 {
 	is_null_line = 1;
 	cshift = 0;
@@ -1156,32 +1019,25 @@ null_line()
  * lines which are not split for screen width.
  * {{ This is supposed to be more efficient than forw_line(). }}
  */
-	public POSITION
-forw_raw_line(curr_pos, linep, line_lenp)
-	POSITION curr_pos;
-	char **linep;
-	int *line_lenp;
+off_t
+forw_raw_line(off_t curr_pos, char **linep, int *line_lenp)
 {
-	register int n;
-	register int c;
-	POSITION new_pos;
+	int n;
+	int c;
+	off_t new_pos;
 
-	if (curr_pos == NULL_POSITION || ch_seek(curr_pos) ||
-		(c = ch_forw_get()) == EOI)
-		return (NULL_POSITION);
+	if (curr_pos == -1 || ch_seek(curr_pos) ||
+	    (c = ch_forw_get()) == EOI)
+		return (-1);
 
 	n = 0;
-	for (;;)
-	{
-		if (c == '\n' || c == EOI || ABORT_SIGS())
-		{
+	for (;;) {
+		if (c == '\n' || c == EOI || ABORT_SIGS()) {
 			new_pos = ch_tell();
 			break;
 		}
-		if (n >= size_linebuf-1)
-		{
-			if (expand_linebuf())
-			{
+		if (n >= size_linebuf-1) {
+			if (expand_linebuf()) {
 				/*
 				 * Overflowed the input buffer.
 				 * Pretend the line ended here.
@@ -1190,7 +1046,7 @@ forw_raw_line(curr_pos, linep, line_lenp)
 				break;
 			}
 		}
-		linebuf[n++] = c;
+		linebuf[n++] = (char)c;
 		c = ch_forw_get();
 	}
 	linebuf[n] = '\0';
@@ -1205,27 +1061,21 @@ forw_raw_line(curr_pos, linep, line_lenp)
  * Analogous to back_line(), but deals with "raw lines".
  * {{ This is supposed to be more efficient than back_line(). }}
  */
-	public POSITION
-back_raw_line(curr_pos, linep, line_lenp)
-	POSITION curr_pos;
-	char **linep;
-	int *line_lenp;
+off_t
+back_raw_line(off_t curr_pos, char **linep, int *line_lenp)
 {
-	register int n;
-	register int c;
-	POSITION new_pos;
+	int n;
+	int c;
+	off_t new_pos;
 
-	if (curr_pos == NULL_POSITION || curr_pos <= ch_zero() ||
-		ch_seek(curr_pos-1))
-		return (NULL_POSITION);
+	if (curr_pos == -1 || curr_pos <= ch_zero() || ch_seek(curr_pos - 1))
+		return (-1);
 
 	n = size_linebuf;
 	linebuf[--n] = '\0';
-	for (;;)
-	{
+	for (;;) {
 		c = ch_back_get();
-		if (c == '\n' || ABORT_SIGS())
-		{
+		if (c == '\n' || ABORT_SIGS()) {
 			/*
 			 * This is the newline ending the previous line.
 			 * We have hit the beginning of the line.
@@ -1233,8 +1083,7 @@ back_raw_line(curr_pos, linep, line_lenp)
 			new_pos = ch_tell() + 1;
 			break;
 		}
-		if (c == EOI)
-		{
+		if (c == EOI) {
 			/*
 			 * We have hit the beginning of the file.
 			 * This must be the first line in the file.
@@ -1243,11 +1092,9 @@ back_raw_line(curr_pos, linep, line_lenp)
 			new_pos = ch_zero();
 			break;
 		}
-		if (n <= 0)
-		{
+		if (n <= 0) {
 			int old_size_linebuf = size_linebuf;
-			if (expand_linebuf())
-			{
+			if (expand_linebuf()) {
 				/*
 				 * Overflowed the input buffer.
 				 * Pretend the line ended here.