===================================================================
RCS file: /cvs/mandoc/mandoc.c,v
retrieving revision 1.66
retrieving revision 1.75
diff -u -p -r1.66 -r1.75
--- mandoc/mandoc.c	2012/06/12 20:21:04	1.66
+++ mandoc/mandoc.c	2013/12/31 23:23:10	1.75
@@ -1,7 +1,7 @@
-/*	$Id: mandoc.c,v 1.66 2012/06/12 20:21:04 kristaps Exp $ */
+/*	$Id: mandoc.c,v 1.75 2013/12/31 23:23:10 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2011, 2012 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2011, 2012, 2013 Ingo Schwarze <schwarze@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -93,12 +93,23 @@ mandoc_escape(const char **end, const char **start, in
 	case ('C'):
 		if ('\'' != **start)
 			return(ESCAPE_ERROR);
-		gly = ESCAPE_SPECIAL;
 		*start = ++*end;
+		if ('u' == (*start)[0] && '\'' != (*start)[1])
+			gly = ESCAPE_UNICODE;
+		else
+			gly = ESCAPE_SPECIAL;
 		term = '\'';
 		break;
 
 	/*
+	 * Escapes taking no arguments at all.
+	 */
+	case ('d'):
+		/* FALLTHROUGH */
+	case ('u'):
+		return(ESCAPE_IGNORE);
+
+	/*
 	 * The \z escape is supposed to output the following
 	 * character without advancing the cursor position.  
 	 * Since we are mostly dealing with terminal mode,
@@ -154,12 +165,16 @@ mandoc_escape(const char **end, const char **start, in
 		/* FALLTHROUGH */
 	case ('b'):
 		/* FALLTHROUGH */
+	case ('B'):
+		/* FALLTHROUGH */
 	case ('D'):
 		/* FALLTHROUGH */
 	case ('o'):
 		/* FALLTHROUGH */
 	case ('R'):
 		/* FALLTHROUGH */
+	case ('w'):
+		/* FALLTHROUGH */
 	case ('X'):
 		/* FALLTHROUGH */
 	case ('Z'):
@@ -174,8 +189,6 @@ mandoc_escape(const char **end, const char **start, in
 	 * These escapes are of the form \X'N', where 'X' is the trigger
 	 * and 'N' resolves to a numerical expression.
 	 */
-	case ('B'):
-		/* FALLTHROUGH */
 	case ('h'):
 		/* FALLTHROUGH */
 	case ('H'):
@@ -183,19 +196,15 @@ mandoc_escape(const char **end, const char **start, in
 	case ('L'):
 		/* FALLTHROUGH */
 	case ('l'):
-		gly = ESCAPE_NUMBERED;
 		/* FALLTHROUGH */
 	case ('S'):
 		/* FALLTHROUGH */
 	case ('v'):
 		/* FALLTHROUGH */
-	case ('w'):
-		/* FALLTHROUGH */
 	case ('x'):
 		if ('\'' != **start)
 			return(ESCAPE_ERROR);
-		if (ESCAPE_ERROR == gly)
-			gly = ESCAPE_IGNORE;
+		gly = ESCAPE_IGNORE;
 		*start = ++*end;
 		term = '\'';
 		break;
@@ -296,13 +305,19 @@ mandoc_escape(const char **end, const char **start, in
 
 	switch (gly) {
 	case (ESCAPE_FONT):
-		/*
-		 * Pretend that the constant-width font modes are the
-		 * same as the regular font modes.
-		 */
-		if (2 == *sz && 'C' == **start) {
-			(*start)++;
-			(*sz)--;
+		if (2 == *sz) {
+			if ('C' == **start) {
+				/*
+				 * Treat constant-width font modes
+				 * just like regular font modes.
+				 */
+				(*start)++;
+				(*sz)--;
+			} else {
+				if ('B' == (*start)[0] && 'I' == (*start)[1])
+					gly = ESCAPE_FONTBI;
+				break;
+			}
 		} else if (1 != *sz)
 			break;
 
@@ -410,10 +425,10 @@ mandoc_strdup(const char *ptr)
  * Parse a quoted or unquoted roff-style request or macro argument.
  * Return a pointer to the parsed argument, which is either the original
  * pointer or advanced by one byte in case the argument is quoted.
- * Null-terminate the argument in place.
+ * NUL-terminate the argument in place.
  * Collapse pairs of quotes inside quoted arguments.
  * Advance the argument pointer to the next argument,
- * or to the null byte terminating the argument line.
+ * or to the NUL byte terminating the argument line.
  */
 char *
 mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
@@ -432,17 +447,35 @@ mandoc_getarg(struct mparse *parse, char **cpp, int ln
 	pairs = 0;
 	white = 0;
 	for (cp = start; '\0' != *cp; cp++) {
-		/* Move left after quoted quotes and escaped backslashes. */
+
+		/*
+		 * Move the following text left
+		 * after quoted quotes and after "\\" and "\t".
+		 */
 		if (pairs)
 			cp[-pairs] = cp[0];
+
 		if ('\\' == cp[0]) {
-			if ('\\' == cp[1]) {
-				/* Poor man's copy mode. */
+			/*
+			 * In copy mode, translate double to single
+			 * backslashes and backslash-t to literal tabs.
+			 */
+			switch (cp[1]) {
+			case ('t'):
+				cp[0] = '\t';
+				/* FALLTHROUGH */
+			case ('\\'):
 				pairs++;
 				cp++;
-			} else if (0 == quoted && ' ' == cp[1])
+				break;
+			case (' '):
 				/* Skip escaped blanks. */
-				cp++;
+				if (0 == quoted)
+					cp++;
+				break;
+			default:
+				break;
+			}
 		} else if (0 == quoted) {
 			if (' ' == cp[0]) {
 				/* Unescaped blanks end unquoted args. */
@@ -466,7 +499,7 @@ mandoc_getarg(struct mparse *parse, char **cpp, int ln
 	if (1 == quoted)
 		mandoc_msg(MANDOCERR_BADQUOTE, parse, ln, *pos, NULL);
 
-	/* Null-terminate this argument and move to the next one. */
+	/* NUL-terminate this argument and move to the next one. */
 	if (pairs)
 		cp[-pairs] = '\0';
 	if ('\0' != *cp) {
@@ -561,10 +594,10 @@ mandoc_normdate(struct mparse *parse, char *in, int ln
 }
 
 int
-mandoc_eos(const char *p, size_t sz, int enclosed)
+mandoc_eos(const char *p, size_t sz)
 {
-	const char *q;
-	int found;
+	const char	*q;
+	int		 enclosed, found;
 
 	if (0 == sz)
 		return(0);
@@ -575,7 +608,7 @@ mandoc_eos(const char *p, size_t sz, int enclosed)
 	 * propagate outward.
 	 */
 
-	found = 0;
+	enclosed = found = 0;
 	for (q = p + (int)sz - 1; q >= p; q--) {
 		switch (*q) {
 		case ('\"'):