Fix use of XMaxTransChars in stead of TCL_UTF_MAX in some places. This should prevent possible buffer overflow when TCL_UTF_MAX=6

Micro-optimizations in tkEntry and ttkEntry

FossilOrigin-Name: d588631887f20ad7fabf33a3e1bd57271e6c1cf3

2 files changed, 4 insertions, 2 deletions

diff --git a/generic/tkEntry.c b/generic/tkEntry.c
index ea8d7f1..c0ce47b 100644
--- a/generic/tkEntry.c
+++ b/generic/tkEntry.c
@@ -1943,7 +1943,8 @@ EntryComputeGeometry(
 	entryPtr->displayString = p;
 
 	for (i = entryPtr->numChars; --i >= 0; ) {
-	    p += Tcl_UniCharToUtf(ch, p);
+	    memcpy(p, buf, size);
+	    p += size;
 	}
 	*p = '\0';
     }
diff --git a/generic/ttk/ttkEntry.c b/generic/ttk/ttkEntry.c
index f395649..533637d 100644
--- a/generic/ttk/ttkEntry.c
+++ b/generic/ttk/ttkEntry.c
@@ -290,7 +290,8 @@ static char *EntryDisplayString(const char *showChar, int numChars)
     p = displayString = ckalloc(numChars * size + 1);
 
     while (numChars--) {
-	p += Tcl_UniCharToUtf(ch, p);
+	memcpy(p, buf, size);
+	p += size;
     }
     *p = '\0';