From f2a2f28f7bde196cd1fa205ac0c20336046cf2cf Mon Sep 17 00:00:00 2001
From: Peter Stephenson <p.w.stephenson@ntlworld.com>
Date: Fri, 16 Jan 2015 20:12:40 +0000
Subject: 32413: turn off history word marking in cmd subst

---
 Src/hist.c | 22 ++++++++++++++++++++--
 Src/lex.c  |  2 ++
 2 files changed, 22 insertions(+), 2 deletions(-)

(limited to 'Src')

diff --git a/Src/hist.c b/Src/hist.c
index 1c5d045e7..c77b5dd9d 100644
--- a/Src/hist.c
+++ b/Src/hist.c
@@ -134,6 +134,8 @@ mod_export int hist_skip_flags;
 /* Bits of histactive variable */
 #define HA_ACTIVE	(1<<0)	/* History mechanism is active */
 #define HA_NOINC	(1<<1)	/* Don't store, curhist not incremented */
+#define HA_INWORD       (1<<2)  /* We're inside a word, don't add
+				   start and end markers */
 
 /* Array of word beginnings and endings in current history line. */
 
@@ -299,6 +301,22 @@ hist_context_restore(const struct hist_stack *hs, int toplevel)
     cmdsp = hs->csp;
 }
 
+/*
+ * Mark that the current level of history is or is not
+ * within a word, whatever turns up.  This is used for nested
+ * parsing of substitutions.
+ */
+
+/**/
+void
+hist_in_word(int yesno)
+{
+    if (yesno)
+	histactive |= HA_INWORD;
+    else
+	histactive &= ~HA_INWORD;
+}
+
 /* restore history context */
 
 /* add a character to the current history word */
@@ -1496,7 +1514,7 @@ int hwgetword = -1;
 void
 ihwbegin(int offset)
 {
-    if (stophist == 2)
+    if (stophist == 2 || (histactive & HA_INWORD))
 	return;
     if (chwordpos%2)
 	chwordpos--;	/* make sure we're on a word start, not end */
@@ -1516,7 +1534,7 @@ ihwbegin(int offset)
 void
 ihwend(void)
 {
-    if (stophist == 2)
+    if (stophist == 2 || (histactive & HA_INWORD))
 	return;
     if (chwordpos%2 && chline) {
 	/* end of word reached and we've already begun a word */
diff --git a/Src/lex.c b/Src/lex.c
index 96da1cbeb..6d45c70c7 100644
--- a/Src/lex.c
+++ b/Src/lex.c
@@ -1922,6 +1922,7 @@ skipcomm(void)
 	new_lexbuf = lexbuf;
 
 	zcontext_save_partial(ZCONTEXT_LEX|ZCONTEXT_PARSE);
+	hist_in_word(1);
     } else {
 	/*
 	 * Set up for nested command subsitution, however
@@ -1992,6 +1993,7 @@ skipcomm(void)
 	tokstr = new_tokstr;
 	lexbuf = new_lexbuf;
 	lexstop = new_lexstop;
+	hist_in_word(0);
     }
 
     if (!lexstop)
-- 
cgit 1.4.1