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

1 files changed, 2 insertions, 2 deletions

diff --git a/unix/tkUnixSelect.c b/unix/tkUnixSelect.c
index 4bb462e..53275d1 100644
--- a/unix/tkUnixSelect.c
+++ b/unix/tkUnixSelect.c
@@ -21,7 +21,7 @@ typedef struct ConvertInfo {
 				 * offset of the next chunk of data to
 				 * transfer. */
     Tcl_EncodingState state;	/* The encoding state needed across chunks. */
-    char buffer[TCL_UTF_MAX];	/* A buffer to hold part of a UTF character
+    char buffer[4];		/* A buffer to hold part of a UTF character
 				 * that is split across chunks.*/
 } ConvertInfo;
 
@@ -439,7 +439,7 @@ TkSelPropProc(
 		 * Preserve any left-over bytes.
 		 */
 
-		if (srcLen > TCL_UTF_MAX) {
+		if (srcLen > 4) {
 		    Tcl_Panic("selection conversion left too many bytes unconverted");
 		}
 		memcpy(incrPtr->converts[i].buffer, src, (size_t) srcLen+1);