1 files changed, 34 insertions, 40 deletions

diff --git a/generic/tclIO.c b/generic/tclIO.c
index a45f39a..cea8119 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -1675,11 +1675,8 @@ Tcl_CreateChannel(
      * interpretation that Tcl_Channels give to the "-encoding binary" option.
      */
 
-    statePtr->encoding = NULL;
     name = Tcl_GetEncodingName(NULL);
-    if (strcmp(name, "binary") != 0) {
-	statePtr->encoding = Tcl_GetEncoding(NULL, name);
-    }
+    statePtr->encoding = Tcl_GetEncoding(NULL, name);
     statePtr->inputEncodingState  = NULL;
     statePtr->inputEncodingFlags  = TCL_ENCODING_START;
     CHANNEL_PROFILE_SET(statePtr->inputEncodingFlags,
@@ -3480,7 +3477,8 @@ TclClose(
 
     stickyError = 0;
 
-    if (GotFlag(statePtr, TCL_WRITABLE) && (statePtr->encoding != NULL)
+    if (GotFlag(statePtr, TCL_WRITABLE)
+	    && (statePtr->encoding != GetBinaryEncoding())
 	    && !(statePtr->outputEncodingFlags & TCL_ENCODING_START)) {
 	int code = CheckChannelErrors(statePtr, TCL_WRITABLE);
 
@@ -4269,11 +4267,7 @@ Tcl_WriteObj(
     do {
 	int chunkSize = srcLen > INT_MAX ? INT_MAX : srcLen;
 	int written;
-	if (statePtr->encoding == NULL) {
-	    written = WriteBytes(chanPtr, src, chunkSize);
-	} else {
-	    written = WriteChars(chanPtr, src, chunkSize);
-	}
+	written = WriteChars(chanPtr, src, chunkSize);
 	if (written < 0) {
 	    return TCL_INDEX_NONE;
 	}
@@ -4651,7 +4645,7 @@ Tcl_GetsObj(
      * done on objPtr.
      */
 
-    if ((statePtr->encoding == NULL)
+    if (statePtr->encoding == GetBinaryEncoding()
 	    && ((statePtr->inputTranslation == TCL_TRANSLATE_LF)
 		    || (statePtr->inputTranslation == TCL_TRANSLATE_CR))
 	    && Tcl_GetByteArrayFromObj(objPtr, (size_t *)NULL) != NULL) {
@@ -4682,15 +4676,6 @@ Tcl_GetsObj(
     }
 
     /*
-     * If there is no encoding, use "iso8859-1" -- Tcl_GetsObj() doesn't
-     * produce ByteArray objects.
-     */
-
-    if (encoding == NULL) {
-	encoding = GetBinaryEncoding();
-    }
-
-    /*
      * Object used by FilterInputBytes to keep track of how much data has been
      * consumed from the channel buffers.
      */
@@ -5236,7 +5221,7 @@ TclGetsObjBinary(
      * XXX - unimplemented.
      */
 
-    if (statePtr->encoding != NULL) {
+    if (statePtr->encoding != GetBinaryEncoding()) {
     }
 
     /*
@@ -5951,7 +5936,7 @@ DoReadChars(
 #define UTF_EXPANSION_FACTOR	1024
     int factor = UTF_EXPANSION_FACTOR;
 
-    binaryMode = (encoding == NULL)
+    binaryMode = (encoding == GetBinaryEncoding())
 	    && (statePtr->inputTranslation == TCL_TRANSLATE_LF)
 	    && (statePtr->inEofChar == '\0');
 
@@ -6244,8 +6229,7 @@ ReadChars(
 				 * UTF-8. On output, contains another guess
 				 * based on the data seen so far. */
 {
-    Tcl_Encoding encoding = statePtr->encoding? statePtr->encoding
-	    : GetBinaryEncoding();
+    Tcl_Encoding encoding = statePtr->encoding;
     Tcl_EncodingState savedState = statePtr->inputEncodingState;
     ChannelBuffer *bufPtr = statePtr->inQueueHead;
     int savedIEFlags = statePtr->inputEncodingFlags;
@@ -7971,12 +7955,8 @@ Tcl_GetChannelOption(
 	if (len == 0) {
 	    Tcl_DStringAppendElement(dsPtr, "-encoding");
 	}
-	if (statePtr->encoding == NULL) {
-	    Tcl_DStringAppendElement(dsPtr, "binary");
-	} else {
-	    Tcl_DStringAppendElement(dsPtr,
-		    Tcl_GetEncodingName(statePtr->encoding));
-	}
+	Tcl_DStringAppendElement(dsPtr,
+	    Tcl_GetEncodingName(statePtr->encoding));
 	if (len > 0) {
 	    return TCL_OK;
 	}
@@ -8196,7 +8176,13 @@ Tcl_SetChannelOption(
 	int profile;
 
 	if ((newValue[0] == '\0') || (strcmp(newValue, "binary") == 0)) {
-	    encoding = NULL;
+	    encoding = Tcl_GetEncoding(NULL, "iso8859-1");
+	    CHANNEL_PROFILE_SET(statePtr->inputEncodingFlags
+		    ,CHANNEL_PROFILE_GET(statePtr->inputEncodingFlags)
+			|TCL_ENCODING_PROFILE_STRICT);
+	    CHANNEL_PROFILE_SET(statePtr->outputEncodingFlags
+		    ,CHANNEL_PROFILE_GET(statePtr->outputEncodingFlags)
+			|TCL_ENCODING_PROFILE_STRICT);
 	} else {
 	    encoding = Tcl_GetEncoding(interp, newValue);
 	    if (encoding == NULL) {
@@ -8209,7 +8195,7 @@ Tcl_SetChannelOption(
 	 * iso2022, the terminated escape sequence must write to the buffer.
 	 */
 
-	if ((statePtr->encoding != NULL)
+	if ((statePtr->encoding != GetBinaryEncoding())
 		&& !(statePtr->outputEncodingFlags & TCL_ENCODING_START)
 		&& (CheckChannelErrors(statePtr, TCL_WRITABLE) == 0)) {
 	    statePtr->outputEncodingFlags |= TCL_ENCODING_END;
@@ -8304,7 +8290,13 @@ Tcl_SetChannelOption(
 		translation = TCL_TRANSLATE_LF;
 		statePtr->inEofChar = 0;
 		Tcl_FreeEncoding(statePtr->encoding);
-		statePtr->encoding = NULL;
+		statePtr->encoding = Tcl_GetEncoding(NULL, "iso8859-1");
+		CHANNEL_PROFILE_SET(statePtr->inputEncodingFlags
+			,CHANNEL_PROFILE_GET(statePtr->inputEncodingFlags)
+			    |TCL_ENCODING_PROFILE_STRICT);
+		CHANNEL_PROFILE_SET(statePtr->outputEncodingFlags
+			,CHANNEL_PROFILE_GET(statePtr->outputEncodingFlags)
+			    |TCL_ENCODING_PROFILE_STRICT);
 	    } else if (strcmp(readMode, "lf") == 0) {
 		translation = TCL_TRANSLATE_LF;
 	    } else if (strcmp(readMode, "cr") == 0) {
@@ -8353,7 +8345,13 @@ Tcl_SetChannelOption(
 	    } else if (strcmp(writeMode, "binary") == 0) {
 		statePtr->outputTranslation = TCL_TRANSLATE_LF;
 		Tcl_FreeEncoding(statePtr->encoding);
-		statePtr->encoding = NULL;
+		statePtr->encoding = Tcl_GetEncoding(NULL, "iso8859-1");
+		CHANNEL_PROFILE_SET(statePtr->inputEncodingFlags
+			,CHANNEL_PROFILE_GET(statePtr->inputEncodingFlags)
+			    |TCL_ENCODING_PROFILE_STRICT);
+		CHANNEL_PROFILE_SET(statePtr->outputEncodingFlags
+			,CHANNEL_PROFILE_GET(statePtr->outputEncodingFlags)
+			    |TCL_ENCODING_PROFILE_STRICT);
 	    } else if (strcmp(writeMode, "lf") == 0) {
 		statePtr->outputTranslation = TCL_TRANSLATE_LF;
 	    } else if (strcmp(writeMode, "cr") == 0) {
@@ -10271,13 +10269,9 @@ Lossless(
 	&& outStatePtr->outputTranslation == TCL_TRANSLATE_LF
 	&& (
 	    (
-		(inStatePtr->encoding == NULL
-		    || inStatePtr->encoding == GetBinaryEncoding()
-		)
+		inStatePtr->encoding == GetBinaryEncoding()
 		&&
-		(outStatePtr->encoding == NULL
-		    || outStatePtr->encoding == GetBinaryEncoding()
-		)
+		outStatePtr->encoding == GetBinaryEncoding()
 	    )
 	    ||
 	    (