From 884ea95c53a46e2e95b6b913443c1b232d0ddcd4 Mon Sep 17 00:00:00 2001
From: dkf <donal.k.fellows@manchester.ac.uk>
Date: Tue, 1 May 2012 08:29:11 +0000
Subject: first actual test of doing something with a compression dictionary

---
 generic/tclZlib.c | 16 ++++++++++------
 tests/zlib.test   | 15 +++++++++++++++
 2 files changed, 25 insertions(+), 6 deletions(-)

diff --git a/generic/tclZlib.c b/generic/tclZlib.c
index a1b8afc..1fe5b05 100644
--- a/generic/tclZlib.c
+++ b/generic/tclZlib.c
@@ -2272,11 +2272,7 @@ ZlibPushSubcmd(
     }
 
     if (ZlibStackChannelTransform(interp, mode, format, level, chan,
-	    headerObj, NULL) == NULL) {
-	return TCL_ERROR;
-    }
-    if ((compDictObj != NULL) && (Tcl_SetChannelOption(interp, chan,
-	    "-dictionary", TclGetString(compDictObj)) != TCL_OK)) {
+	    headerObj, compDictObj) == NULL) {
 	return TCL_ERROR;
     }
     Tcl_SetObjResult(interp, objv[3]);
@@ -2762,6 +2758,7 @@ ZlibTransformSetOption(			/* not used */
     if (optionName && (strcmp(optionName, "-dictionary") == 0)
 	    && (cd->format != TCL_ZLIB_FORMAT_GZIP)) {
 	Tcl_Obj *compDictObj;
+	int code;
 
 	TclNewStringObj(compDictObj, value, strlen(value));
 	Tcl_IncrRefCount(compDictObj);
@@ -2770,7 +2767,14 @@ ZlibTransformSetOption(			/* not used */
 	    TclDecrRefCount(cd->compDictObj);
 	}
 	cd->compDictObj = compDictObj;
-	// TODO: consider whether to apply immediately
+	if (cd->mode == TCL_ZLIB_STREAM_DEFLATE) {
+	    code = SetDeflateDictionary(&cd->outStream, compDictObj);
+	    if (code != Z_OK) {
+		ConvertError(interp, code);
+		return TCL_ERROR;
+	    }
+	}
+	return TCL_OK;
     }
 
     if (haveFlushOpt && optionName && strcmp(optionName, "-flush") == 0) {
diff --git a/tests/zlib.test b/tests/zlib.test
index 017243b..05b5ed5 100644
--- a/tests/zlib.test
+++ b/tests/zlib.test
@@ -188,6 +188,21 @@ test zlib-8.6 {transformation and fconfigure} -setup {
     catch {close $fd}
     removeFile $file
 } -result {{-blocking 1 -buffering full -buffersize 4096 -encoding binary -eofchar {} -translation lf} {-blocking 1 -buffering full -buffersize 4096 -encoding binary -eofchar {} -translation lf -checksum 0} {-blocking 1 -buffering full -buffersize 4096 -encoding binary -eofchar {} -translation lf}}
+test zlib-8.7 {transformtion and fconfigure} -setup {
+    lassign [chan pipe] inSide outSide
+    set msg [string repeat "am i all that i am at all? i am all that i am!" 400]
+    set dict "thatallam i "
+} -constraints zlib -body {
+    zlib push compress $outSide -dictionary $dict
+    fconfigure $outSide -blocking 0 -translation binary -buffering none
+    fconfigure $inSide -blocking 0 -translation binary
+    puts -nonewline $outSide $msg
+    chan pop $outSide
+    string length [read $inSide]
+} -cleanup {
+    catch {close $outSide}
+    catch {close $inSide}
+} -result 103
 
 test zlib-9.1 "check fcopy with push" -constraints zlib -setup {
     set sfile [makeFile {} testsrc.gz]
-- 
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