33320 (cf. PWS 33311): revert 33069, fix lexing of bangchar during completion

add typtab_flags bits (replaces specialcomma boolean) to record any unusual handling of typtab entries; signal safety; make bangchar non-special during completion lexing of the command line.

ChangeLog

@@ -1,3 +1,11 @@
+2014-10-02  Barton E. Schaefer  <schaefer@zsh.org>
+
+	* 33320 (cf. PWS 33311): Completion/Base/Completer/_expand_alias,
+	Src/Zle/compcore.c, Src/utils.c, Src/ztype.h: revert 33069; add
+	typtab_flags bits (replaces specialcomma boolean) to record any
+	unusual handling of typtab entries; signal safety; make bangchar
+	non-special during completion lexing of the command line.
+
 2014-10-02  Peter Stephenson  <p.stephenson@samsung.com>
 
 	* 33325: Src/exec.c, Test/A05execution.ztst: fix ksh autoloads

Completion/Base/Completer/_expand_alias

@@ -25,8 +25,6 @@ else
   pre=(_main_complete - aliases)
 fi
 
-[[ "$compstate[quoting]" = (single|double) ]] || word="${(Q)word}"
-
 zstyle -s ":completion:${curcontext}:" regular tmp || tmp=yes
 case $tmp in
 always) sel=r;;

Src/Zle/compcore.c

@@ -702,6 +702,7 @@ callcompfunc(char *s, char *fn)
 	}
 	zsfree(compprefix);
 	zsfree(compsuffix);
+	makebangspecial(0);
 	if (unset(COMPLETEINWORD)) {
 	    tmp = (linwhat == IN_MATH ? dupstring(s) : multiquote(s, 0));
 	    untokenize(tmp);
@@ -722,6 +723,7 @@ callcompfunc(char *s, char *fn)
 	    untokenize(ss);
 	    compsuffix = ztrdup(ss);
 	}
+	makebangspecial(1);
         zsfree(complastprefix);
         zsfree(complastsuffix);
         complastprefix = ztrdup(compprefix);

Src/utils.c

@@ -3424,12 +3424,12 @@ equalsplit(char *s, char **t)
     return 0;
 }
 
-static int specialcomma;
 
 /* the ztypes table */
 
 /**/
 mod_export short int typtab[256];
+static int typtab_flags = 0;
 
 /* initialize the ztypes table */
 
@@ -3440,8 +3440,15 @@ inittyptab(void)
     int t0;
     char *s;
 
-    for (t0 = 0; t0 != 256; t0++)
-	typtab[t0] = 0;
+    if (!(typtab_flags & ZTF_INIT)) {
+	typtab_flags = ZTF_INIT;
+	if (interact && isset(SHINSTDIN))
+	    typtab_flags |= ZTF_INTERACT;
+    }
+
+    queue_signals();
+
+    memset(typtab, 0, sizeof(typtab));
     for (t0 = 0; t0 != 32; t0++)
 	typtab[t0] = typtab[t0 + 128] = ICNTRL;
     typtab[127] = ICNTRL;
@@ -3514,20 +3521,43 @@ inittyptab(void)
 #endif
     for (s = SPECCHARS; *s; s++)
 	typtab[STOUC(*s)] |= ISPECIAL;
-    if (specialcomma)
+    if (typtab_flags & ZTF_SP_COMMA)
 	typtab[STOUC(',')] |= ISPECIAL;
-    if (isset(BANGHIST) && bangchar && interact && isset(SHINSTDIN))
+    if (isset(BANGHIST) && bangchar && (typtab_flags & ZTF_INTERACT)) {
+	typtab_flags |= ZTF_BANGCHAR;
 	typtab[bangchar] |= ISPECIAL;
+    } else
+	typtab_flags &= ~ZTF_BANGCHAR;
+
+    unqueue_signals();
 }
 
 /**/
 mod_export void
 makecommaspecial(int yesno)
 {
-    if ((specialcomma = yesno) != 0)
+    if (yesno != 0) {
+	typtab_flags |= ZTF_SP_COMMA;
 	typtab[STOUC(',')] |= ISPECIAL;
-    else
+    } else {
+	typtab_flags &= ~ZTF_SP_COMMA;
 	typtab[STOUC(',')] &= ~ISPECIAL;
+    }
+}
+
+/**/
+mod_export void
+makebangspecial(int yesno)
+{
+    /* Name and call signature for congruence with makecommaspecial(),
+     * but in this case when yesno is nonzero we defer to the state
+     * saved by inittyptab().
+     */ 
+    if (yesno == 0) {
+	typtab[bangchar] &= ~ISPECIAL;
+    } else if (typtab_flags & ZTF_BANGCHAR) {
+	typtab[bangchar] |= ISPECIAL;
+    }
 }
 
 

Src/ztype.h

@@ -59,6 +59,15 @@
 #define iwsep(X) zistype(X,IWSEP)
 #define inull(X) zistype(X,INULL)
 
+/*
+ * Bit flags for typtab_flags --- preserved after
+ * shell initialisation.
+ */
+#define ZTF_INIT     (0x0001) /* One-off initialisation done */
+#define ZTF_INTERACT (0x0002) /* Shell interative and reading from stdin */
+#define ZTF_SP_COMMA (0x0004) /* Treat comma as a special characters */
+#define ZTF_BANGCHAR (0x0008) /* Treat bangchar as a special character */
+
 #ifdef MULTIBYTE_SUPPORT
 #define WC_ZISTYPE(X,Y) wcsitype((X),(Y))
 #define WC_ISPRINT(X)	iswprint(X)