[v1.0] Fix SHOPT_EDPREDICT build (re: a45a0eb, 9ff7f3d, 5b0f235)

The SHOPT_EDPREDICT compile-time option has been removed from the
dev branch (see #233) but kept on the 1.0 branch. Building with
this option enabled in SHOPT.sh was subsequently broken by the
three referenced commits as changes were cherry-picked from the dev
branch, which of course did not include the necessary code changes
to the SHOPT_EDPREDICT code. This commit backports those changes.

Thanks to @k2662 for the report.
Resolves: #786

src/cmd/ksh93/README

@@ -73,7 +73,7 @@ The options have the following defaults and meanings:
                      be displayed as a numbered list as you type. You can
                      scroll up and down this list or you can use <ESC>nTAB to
                      make this the current line (n defaults to 1 if omitted).
-                     Experimental. Bugs: https://github.com/ksh93/ksh/issues/233
+                     Deprecated. Bugs: https://github.com/ksh93/ksh/issues/233
 
     ESH          on  Compile with emacs command line editing.  The original
                      emacs line editor code was provided by Mike Veach at IH.

src/cmd/ksh93/SHOPT.sh

@@ -18,7 +18,7 @@ SHOPT CRNL=				# accept MS Windows newlines (<cr><nl>) for <nl>
 SHOPT DEVFD=				# use /dev/fd instead of FIFOs for process substitutions
 SHOPT DYNAMIC=1				# dynamic loading for builtins
 SHOPT ECHOPRINT=			# make echo equivalent to print
-SHOPT EDPREDICT=0			# History pattern search menu (type #<pattern>, then ESC <number> TAB). Experimental.
+SHOPT EDPREDICT=0			# History pattern search menu (type #<pattern>, then ESC <number> TAB). Deprecated.
 SHOPT ESH=1				# emacs/gmacs edit mode
 SHOPT FILESCAN=1			# fast file scan: while <file; do [use $REPLY or positional parameters]; done
 SHOPT FIXEDARRAY=1			# fixed dimension indexed array

src/cmd/ksh93/edit/edit.c

@@ -1425,7 +1425,7 @@ int ed_histgen(Edit_t *ep,const char *pattern)
 	hp = sh.hist_ptr;
 	if(*pattern=='#' && *++pattern=='#')
 		return(0);
-	cp = stakalloc(m=strlen(pattern)+6);
+	cp = stkalloc(sh.stk,m=strlen(pattern)+6);
 	sfsprintf(cp,m,"@(%s)*%c",pattern,0);
 	if(ep->hlist)
 	{
@@ -1444,7 +1444,7 @@ int ed_histgen(Edit_t *ep,const char *pattern)
 				maxmatch = ep->e_cur;
 			return(ep->hmax=av-argv);
 		}
-		stakset(ep->e_stkptr,ep->e_stkoff);
+		stkset(sh.stk,ep->e_stkptr,ep->e_stkoff);
 	}
 	if((m=strlen(cp)) >= sizeof(ep->hpat))
 		m = sizeof(ep->hpat)-1;
@@ -1463,7 +1463,7 @@ int ed_histgen(Edit_t *ep,const char *pattern)
 		if(strmatch(cp,pattern))
 		{
 			l = ed_histlencopy(cp,(char*)0);
-			mp = (Histmatch_t*)stakalloc(sizeof(Histmatch_t)+l);
+			mp = stkalloc(sh.stk,sizeof(Histmatch_t)+l);
 			mp->next = mplast;
 			mplast = mp;
 			mp->len = l;
@@ -1477,7 +1477,7 @@ int ed_histgen(Edit_t *ep,const char *pattern)
 	if(ac>0)
 	{
 		l = ac;
-		argv = av  = (char**)stakalloc((ac+1)*sizeof(char*));
+		argv = av = stkalloc(sh.stk,(ac+1)*sizeof(char*));
 		for(; l>=0 && (*av= (char*)mp); mp=mp->next,av++)
 			l--;
 		*av = 0;
@@ -1530,11 +1530,11 @@ void	ed_histlist(Edit_t *ep,int n)
 	}
 	else
 	{
-		stakset(ep->e_stkptr,ep->e_stkoff);
+		stkset(sh.stk,ep->e_stkptr,ep->e_stkoff);
 		ep->hlist = 0;
 		ep->nhlist = 0;
 	}
-	ed_putstring(ep,ERASE_EOS);
+	ed_putstring(ep,erase_eos);
 	if(n)
 	{
 		for(i=1; (mp= *mpp) && i <= 16 ; i++,mpp++)
@@ -1562,7 +1562,7 @@ void	ed_histlist(Edit_t *ep,int n)
 		}
 		last = i-1;
 		while(i-->0)
-			ed_putstring(ep,CURSOR_UP);
+			ed_putstring(ep,cursor_up);
 	}
 	ed_flush(ep);
 }

src/cmd/ksh93/edit/emacs.c

@@ -1607,7 +1607,7 @@ static void draw(Emacs_t *ep,Draw_t option)
 		if(ep->ed->hlist)
 		{
 			ed_histlist(ep->ed,n);
-			putstring(ep,Prompt);
+			ed_putstring(ep->ed,Prompt);
 			ed_setcursor(ep->ed,ep->screen,0,ep->cursor-ep->screen, 0);
 		}
 		else

src/cmd/ksh93/edit/vi.c

@@ -1772,7 +1772,7 @@ static void refresh(Vi_t* vp, int mode)
 		if(vp->ed->hlist)
 		{
 			ed_histlist(vp->ed,n);
-			pr_string(vp,Prompt);
+			ed_putstring(vp->ed,Prompt);
 			vp->ocur_virt = INVALID;
 			ed_setcursor(vp->ed,physical,0,cur_phys,0);
 		}