add some per-record debugging

Best practice is to only use constant format strings,
which ansiEscape() almost is.

.ci-local/defaults.set

@@ -0,0 +1,12 @@
+MODULES=calc asyn
+
+# EPICS Base
+BASE_DIRNAME=base
+BASE_REPONAME=epics-base
+BASE_REPOOWNER=epics-base
+BASE_VARNAME=EPICS_BASE
+BASE_RECURSIVE=no
+
+ASYN_REPOOWNER=epics-modules
+
+CALC_REPOOWNER=epics-modules

.github/workflows/ci-scripts-build.yml

@@ -0,0 +1,164 @@
+# .github/workflows/ci-scripts-build.yml for use with EPICS Base ci-scripts
+# (see: https://github.com/epics-base/ci-scripts)
+
+# This is YAML - indentation levels are crucial
+
+# Workflow name, shared by all branches
+
+name: StreamDevice
+
+# Trigger on pushes and PRs to any branch
+on:
+  push:
+    paths-ignore:
+      - 'docs/*'
+      - '.gitattributes'
+      - '.gitignore'
+      - '**/*.html'
+      - '**/*.md'
+  pull_request:
+    paths-ignore:
+      - 'docs/*'
+      - '.gitattributes'
+      - '.gitignore'
+      - '**/*.html'
+      - '**/*.md'
+
+env:
+    SETUP_PATH: .ci-local:.ci
+    EPICS_TEST_IMPRECISE_TIMING: YES
+
+jobs:
+  native:
+    name: ${{ matrix.name }}
+    runs-on: ${{ matrix.os }}
+    # Set environment variables from matrix parameters
+    env:
+      CMP: ${{ matrix.cmp }}
+      BCFG: ${{ matrix.configuration }}
+      BASE: ${{ matrix.base }}
+      WINE: ${{ matrix.wine }}
+      RTEMS: ${{ matrix.rtems }}
+      RTEMS_TARGET: ${{ matrix.rtems_target }}
+      TEST: ${{ matrix.test }}
+      EXTRA: ${{ matrix.extra }}
+      VV: "1"
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: Native Linux (WError)
+            os: ubuntu-20.04
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            extra: "CMD_CPPFLAGS=-Werror"
+            pcre: apt
+
+          - name: Cross mingw64 DLL
+            os: ubuntu-20.04
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            wine: "64"
+            pcre: no
+
+          - name: Cross mingw64 static
+            os: ubuntu-20.04
+            cmp: gcc
+            configuration: static
+            base: "7.0"
+            wine: "64"
+            pcre: no
+
+          - name: RTEMS 4.10
+            os: ubuntu-20.04
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            rtems: "4.10"
+            rtems_target: RTEMS-pc386-qemu
+            pcre: no
+ 
+          - name: Native Linux with clang
+            os: ubuntu-20.04
+            cmp: clang
+            configuration: default
+            base: "7.0"
+            pcre: apt
+
+          - name: Native Linux with 3.15
+            os: ubuntu-20.04
+            cmp: gcc
+            configuration: default
+            base: "3.15"
+            pcre: apt
+
+          - name: Native Linux with 3.14
+            os: ubuntu-20.04
+            cmp: gcc
+            configuration: default
+            base: "3.14"
+            pcre: apt
+
+          - name: OSX
+            os: macos-latest
+            cmp: clang
+            configuration: default
+            base: "7.0"
+            pcre: no
+
+          - name: vs2019 DLL
+            os: windows-2019
+            cmp: vs2019
+            configuration: debug
+            base: "7.0"
+            pcre: no
+            extra: "CMD_CFLAGS=-analysis CMD_CXXFLAGS=-analysis"
+
+          - name: vs2019 static
+            os: windows-2019
+            cmp: vs2019
+            configuration: static-debug
+            base: "7.0"
+            pcre: no
+            extra: "CMD_CFLAGS=-analysis CMD_CXXFLAGS=-analysis"
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+    - name: Automatic core dumper analysis
+      uses: mdavidsaver/ci-core-dumper@master
+    - name: "apt-get install"
+      run: |
+        sudo apt-get update
+        sudo apt-get -y install qemu-system-x86 g++-mingw-w64-x86-64 gdb
+      if: runner.os == 'Linux'
+
+    - name: Reset RELEASE
+      shell: bash
+      # 'make' on Mac doesn't understand "undefine PCRE"
+      # so replace the whole file
+      run: |
+        cat <<EOF > configure/RELEASE
+        -include \$(TOP)/../RELEASE.local
+        -include \$(TOP)/../RELEASE.\$(EPICS_HOST_ARCH).local
+        -include \$(TOP)/configure/RELEASE.local
+        EOF
+
+    - name: Prepare and compile dependencies
+      run: python .ci/cue.py prepare
+
+    - name: "apt-get install pcre"
+      if: matrix.pcre == 'apt'
+      shell: bash
+      run: |
+        sudo apt-get -y install libpcre3-dev
+        cat <<EOF >> configure/CONFIG_SITE.local
+        PCRE_INCLUDE=/usr/include
+        PCRE_LIB=/usr/lib
+        EOF
+
+    - name: Build main module
+      run: python .ci/cue.py build

.gitmodules

@@ -0,0 +1,3 @@
+[submodule ".ci"]
+	path = .ci
+	url = https://github.com/epics-base/ci-scripts.git

GNUmakefile

@@ -24,11 +24,11 @@ HEADERS += src/StreamFormat.h
 HEADERS += src/StreamFormatConverter.h
 HEADERS += src/StreamBuffer.h
 HEADERS += src/StreamError.h
-HEADERS += src/StreamVersion.h
 HEADERS += src/StreamProtocol.h
 HEADERS += src/StreamBusInterface.h
 HEADERS += src/StreamCore.h
 HEADERS += src/MacroMagic.h
+HEADERS += $(COMMON_DIR)/StreamVersion.h
 
 CPPFLAGS += -DSTREAM_INTERNAL -I$(COMMON_DIR)
 

configure/Makefile

@@ -4,10 +4,6 @@ TOP=..
 
 include $(TOP)/configure/CONFIG
 
-# Set the following to NO to disable consistency checking of
-# the support applications defined in $(TOP)/configure/RELEASE
-CHECK_RELEASE = YES
-
 TARGETS = $(CONFIG_TARGETS)
 CONFIGS += $(subst ../,,$(wildcard $(CONFIG_INSTALLS)))
 

docs/formats.html

@@ -594,6 +594,18 @@ In input, the next byte or bytes must match the checksum.
    href="https://en.wikipedia.org/wiki/Longitudinal_redundancy_check">Wikipedia</a>.</dd>
  <dt><code>%&lt;hexlrc&gt;</code></dt>
   <dd>One byte. The LRC for the hex digits. (Other characters are ignored.)</dd>
+ <dt><code>%&lt;leybold&gt;</code></dt>
+  <dd>One byte. Used by some Leybold products. 255-bytesum%255 (+32 if result would be <32)</dd>
+ <dt><code>%&lt;brksCryo&gt;</code></dt>
+  <dd>One byte. Used by Brooks Cryopumps.</dd>
+ <dt><code>%&lt;CPI&gt;</code></dt>
+  <dd>One byte. Used by TRIUMF CPI RF amplifier.</dd>
+ <dt><code>%&lt;bitsum&gt;</code> or <code>%&lt;bitsum8&gt;</code></dt>
+  <dd>One byte. Number of 1 bits in all characters.</dd>
+ <dt><code>%&lt;bitsum16&gt;</code></dt>
+  <dd>Two bytes. Number of 1 bits in all characters.</dd>
+ <dt><code>%&lt;bitsum32&gt;</code></dt>
+  <dd>Four bytes. Number of 1 bits in all characters.</dd>
 </dl>
 
 <a name="regex"></a>

docs/makepdf

@@ -1,10 +1,22 @@
 #/bin/sh
-if ! wkhtmltopdf -V >/dev/null 2>&1
-then
+wkhtmltopdf --enable-local-file-access -V >/dev/null 2>&1
+case $? in
+  127)
     echo "wkhtmltopdf not installed." >&2
     echo "See https://wkhtmltopdf.org" >&2
     exit 1
-fi
+    ;;
+  0)
+    # have (and need) --enable-local-file-access
+    ENABLE_FILE_ACCESS=--enable-local-file-access
+    ;;
+  1)
+    # have no (and need no) --enable-local-file-access
+    ;;
+  *)
+    # Some error but I don't know what it means. Try anyway.
+    ;;
+esac
 
 PAGES="
 index.html
@@ -43,5 +55,5 @@ osinterface.html
 "
 
 rm -f stream.pdf
-wkhtmltopdf --print-media-type --dpi 1200 --zoom 0.85 --page-size Letter \
-$PAGES stream.pdf
+wkhtmltopdf --print-media-type --page-size Letter \
+$ENABLE_FILE_ACCESS $PAGES stream.pdf

docs/setup.html

@@ -385,35 +385,45 @@ See the <a href="protocol.html">next chapter</a> for protocol files in depth.
 Generation of debug and error messages is controlled with two shell variables,
 <code>streamDebug</code> and <code>streamError</code>.
 Setting those variables to 1 (actually to any number but 0) enables the
-messages.
+messages. A few noisy and rarely useful debug messages are only enabled when
+setting <code>streamDebug</code> to 2.
 Per default debug messages are switched off and error messages are switched on.
 Errors occuring while loading protocol files are always shown.
 </p>
 <p>
-Warning: Enabling debug messages can create a lot of output!
-At the moment, there is no way to set filters on debug or error messages.
+Warning: Enabling debug messages this way can create a lot of output!
+Therefore, some limited debugging can be enabled per record, independent of
+the <code>streamDebug</code> variable using the <code>.TPRO</code> field of
+the record. Currently, setting <code>.TPRO</code> to 1 or 2 enables some
+basic information about the processing of a record and its i/o.
 </p>
 <p>
 Debug output can be redirected to a file with the command
 <code>streamSetLogfile("<var>filename</var>")</code>.
-When called without a filename, debug output is directed back
-to the console.
+If the file already exists, it will be overwritten, not appended to.
+While debug messages are only written to the defined log file, error messages
+are still printed to <var>stderr</var> too.
+Calling <code>streamSetLogfile</code> without a filename directs debug output
+back to <var>stderr</var> and closes the log file.
 </p>
 <p>
-By default the debug/error output is set to be colored if the terminal allows
-it but this can be set to always colored or never colored by setting 
-<code>streamDebugColored</code> to 1 or 0 respectively.
+By default, error messages to the console are printed in red color if
+<var>stderr</var> is a tty at startup time, using ANSI color codes. Some
+terminals may not support this properly.
+The variable <code>streamDebugColored</code> can be set to 0 or 1 to
+disable or enable colored error messages explicitly.
+Error messages written to a log file do not use colors.
 </p>
 <p>
 Error and debug messages are prefixed with a time stamp unless the variable
 <code>streamMsgTimeStamped</code> is set to 0.
 </p>
 <p>
-When a device is disconnected StreamDevice can produce many repeated timeout 
-messages. To reduce this logging you can set <code>streamErrorDeadTime</code>
-to an integer number of seconds. When this is set repeated timeout messages 
-will not be printed in the specified dead time after the last message. The 
-default dead time is 0, resulting in every message being printed.
+when a device is unresponsive, StreamDevice may produce many repeated timeout 
+messages. To reduce this, you can set <code>streamErrorDeadTime</code>
+to an integer number of seconds. In this case, repeated timeout messages 
+will not be printed during the specified dead time after the last printed
+message. The default dead time is 0, resulting in every message being printed.
 </p>
 
 <h3>Example (vxWorks):</h3>

docs/stream.css

@@ -1,90 +1,104 @@
-a:link    {color: #0000D0;}
-a:visited {color: #0000D0;}
-a:hover   {color: #FF0000;}
+a:link    { color: #0000D0; }
+a:visited { color: #0000D0; }
+a:hover   { color: #FF0000; }
 
 body {
-    margin-right:1em;
-    margin-left:15em;
-    margin-top:75px;
-    padding-top:1px;
+    margin-right: 1em;
+    margin-left: 15em;
+    margin-top: 75px;
+    padding-top: 1px;
     font-family: Helvetica, Arial, sans-serif;
     font-size: 100%;
-    background-color:#ffffff;
+    background-color: #ffffff;
 }
 
-a[name] { position:relative; top:-11ex;}
+a[name] {
+    position: relative;
+    top: -11ex;
+}
+
+pre, tt, kbd, code {
+    font-size: 95%;
+    font-family: Mono, "Lucida Console", Courier, monospace;
+}
 
 pre {
-    background-color:#f4f4f4;
-    padding:1ex;
-    border:1px solid #000000;
-    white-space:pre;
-    margin:2ex;
-    page-break-inside:avoid;
+    background-color: #f4f4f4;
+    padding: 1ex;
+    border: 1px solid #000000;
+    white-space: pre;
+    margin: 2ex;
+    page-break-inside: avoid;
+    font-size: 85%;
+    white-space: pre-wrap;
 }
 
 kbd {
-    font-weight:bold;
+    font-weight: bold;
+}
+
+code {
+    color: #008000;
 }
 
 dt {
-    margin-top:0.5ex;
+    margin-top: 0.5ex;
 }
 
 h1 {
-    font-size:250%;
-    margin-top:0;
-    font-style:italic;
-    font-weight:bold;
-    font-family:"Times New Roman", serif;
-    text-align:center;
-    position:fixed;
-    top:0;
-    left:0;
-    width:100%;
-    line-height:190%;
-    background-color:white;
-    border-width:0;
-    border-bottom:3px solid #1b4486;
-    white-space:nowrap;
-    background-image:url(PSI.png);
-    background-repeat:no-repeat;
-    background-position:10px 5px;
-    text-shadow:.1em .1em .1em darkgray;
-    box-shadow:0 .3em .1em -.2em darkgray;
+    font-size: 250%;
+    margin-top: 0;
+    font-style: italic;
+    font-weight: bold;
+    font-family: "Times New Roman", Times, serif;
+    text-align: center;
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    line-height: 190%;
+    background-color: white;
+    border-width: 0;
+    border-bottom: 3px solid #1b4486;
+    white-space: nowrap;
+    background-image: url(PSI.png);
+    background-repeat: no-repeat;
+    background-position: 10px 5px;
+    text-shadow: .1em .1em .1em lightgray;
+    box-shadow: 0 .3em .1em -.2em darkgray;
 }
 
 h2 {
-    font-size:150%;
-    margin-bottom:0.5ex;
+    font-size: 140%;
+    margin-bottom: 0.5ex;
 }
 
 h3 {
-    font-size:120%;
-    margin-bottom:0.25ex;
+    font-size: 120%;
+    margin-bottom: 0.25ex;
 }
 
 h4 {
-    font-size:100%;
-    margin-bottom:0.25ex;
+    font-size: 100%;
+    margin-bottom: 0.25ex;
 }
 
 h1, h2, h3, h4 {
-    page-break-after:avoid;
+    page-break-after: avoid;
 }
 
 p {
-    margin-top:0.75ex;
-    margin-bottom:0.75ex;
+    margin-top: 0.75ex;
+    margin-bottom: 0.75ex;
 }
 
 body h1 + p {
-    margin-top:1.5ex;
-    margin-bottom:0.75ex;
+    margin-top: 1.5ex;
+    margin-bottom: 0.75ex;
 }
 
 footer {
-    font-size:75%;
+    font-size: 75%;
     margin-top: 1em;
     border-top: 1px solid darkgray;
     padding-top: 1em;
@@ -97,44 +111,40 @@ footer a:only-of-type {
 }
 
 small {
-    font-size:75%;
-}
-
-code {
-    font-size: 125%;
-    color: #008000;
+    font-size: 75%;
 }
 
 .indent {
-    text-indent:-4ex;
-    margin-left:4ex;
-    margin-top:0.5ex;
-    text-align:left;
+    text-indent: -4ex;
+    margin-left: 4ex;
+    margin-top: 0.5ex;
+    text-align: left;
 }
 
 .box {
-    margin-left:1ex;
-    margin-right:1ex;
-    margin-top:0.5ex;
+    margin-left: 1ex;
+    margin-right: 1ex;
+    margin-top: 0.5ex;
     padding: 0 1ex;
-    border: 1px solid black;
-    text-align:left;
-    background-color:#f0f0f0;
+    border: thin solid black;
+    text-align: left;
+    background-color: #f0f0f0;
+    page-break-inside: avoid;
 }
 
 #navleft {
-    position:fixed;
-    left:0;
-    top:0;
-    padding-top:70px;
-    width:14em;
-    height:100%;
-    border-style:solid;
-    border-color:black;
-    border-width:0 1px 0 0;
-    background-color:#e3eaf6;
-    overflow:hidden;
-    z-index:0;
+    position: fixed;
+    left: 0;
+    top: 0;
+    padding-top: 70px;
+    width: 14em;
+    height: 100%;
+    border-style: solid;
+    border-color: black;
+    border-width: 0 1px 0 0;
+    background-color: #e3eaf6;
+    overflow: hidden;
+    z-index: 0;
 }
 
 .new {
@@ -142,17 +152,18 @@ code {
 }
 
 a[target=ex]:after {
-  content:" " url(ex.png);
+    content: " " url(ex.png);
 }
 
 a[target=ex]:hover:after {
-  content: " " url(exr.png);
+    content: " " url(exr.png);
 }
 
 @media print {
-  a:link    {text-decoration:none;}
-  a[target=ex]:after {content:" [" attr(href) "]";}
-  body      {margin:0 4em;}
-  h1        {position:relative; background-position:0 0;}
-  #navleft  {display:none;}
+    a:link    { text-decoration: none; }
+    a[target=ex]:after { content:" [" attr(href) "]"; font-size: 75%; }
+    body      { margin: 0 4em; }
+    h1        { position: relative; background-position: 0 0; }
+    #navleft  { display: none; }
+    footer    { display: none; }
 }

docs/tipsandtricks.html

@@ -293,9 +293,10 @@ record (stringout, "$(DEVICE):clean_2") {<br>
 <a name="web"></a>
 <h2>I need to read a web page</h2>
 <p>
-First you have to send a correctly formatted HTML request.
-Note that this request must contain the full URL like
-"http://server/page" and must be terminated with <u>two</u> newlines.
+First you have to send a correctly formatted HTML header for a GET request.
+Note that this header must contain the full URL like
+"http://server/page" and must be terminated with <u>two</u>
+CR LF sequences (<code>"\r\n\r\n"</code> or <code>CR LF CR LF</code>).
 The server should be the same as in the
 <a href="setup.html#sta"><code>drvAsynIPPortConfigure</code></a>
 command (if not using a http proxy).
@@ -313,17 +314,18 @@ Read the title of a web page.
 get_title {<br>
 &nbsp;&nbsp;extrainput = ignore;<br>
 &nbsp;&nbsp;replyTimeout = 1000;<br>
-&nbsp;&nbsp;out "GET http://\$1\n\n";<br>
+&nbsp;&nbsp;out "GET http://\$1\r\n\r\n";<br>
 &nbsp;&nbsp;in "%+.1/(?im)&lt;title&gt(.*)&lt\/title&gt;/";<br>
 }
 </code>
 </p>
 <p>
-Terminate the request with two newlines, either explicit like here
-<u>or</u> using an 
+Terminate the request with two carriage return + newlines, either explicit
+like here <u>or</u> using an 
 <a href="protocol.html#sysvar"><code>outTerminator</code></a>.
 The URI (without http:// but including the web server host name)
-is passed as <a href="protocol.html#argvar">argument</a> 1 to <code>\$1</code>.
+is passed as <a href="protocol.html#argvar">argument</a> 1 to <code>\$1</code>
+in this example.
 Note that web servers may be slow, so allow some
 <a href="protocol.html#argvar"><code>replyTimeout</code></a>.
 </p>
@@ -390,7 +392,7 @@ Then we read the number.
 get_title {<br>
 &nbsp;&nbsp;extrainput = ignore;<br>
 &nbsp;&nbsp;replyTimeout = 1000;<br>
-&nbsp;&nbsp;out "GET http://\$1\n\n";<br>
+&nbsp;&nbsp;out "GET http://\$1\r\n\r\n";<br>
 &nbsp;&nbsp;in "%*/Interesting value:/%f more text";<br>
 }
 </code>

src/ChecksumConverter.cc

@@ -20,43 +20,57 @@
 * along with StreamDevice. If not, see https://www.gnu.org/licenses/.
 *************************************************************************/
 
-#if defined(vxWorks)
-#include <version.h>
-#if defined(_WRS_VXWORKS_MAJOR) && _WRS_VXWORKS_MAJOR > 6 || (_WRS_VXWORKS_MAJOR == 6 && _WRS_VXWORKS_MINOR > 8)
-#include <stdint.h>
-#define PRIX32 "X"
-#define PRIu32 "u"
+#ifdef vxWorks
+  #include <version.h>
+  /* VxWorks has strncasecmp since version 6
+     but availability depends on configuration.
+     We cannot know.
+  */
+  #define NEED_strncasecmp
+  /* VxWorks does not have inttypes.h and uint32_t differs between versions */
+  #if defined(_WRS_VXWORKS_MAJOR) && (_WRS_VXWORKS_MAJOR > 6 || (_WRS_VXWORKS_MAJOR == 6 && _WRS_VXWORKS_MINOR >= 9))
+    #define PRIX32 "X"
+    #define PRIu32 "u"
+  #else
+    #define PRIX32 "lX"
+    #define PRIu32 "lu"
+  #endif
+  #define PRIX8  "X"
+#elif defined(_MSC_VER) && _MSC_VER < 1700
+  /* Visual Studio 2010 does not have inttypes.h */
+  #define PRIX32 "X"
+  #define PRIu32 "u"
+  #define PRIX8  "X"
 #else
-#define PRIX32 "lX"
-#define PRIu32 "lu"
-#endif
-#define PRIX8  "X"
-#define uint_fast8_t uint8_t
-#define int_fast8_t int8_t
-#elif defined(_MSC_VER) && _MSC_VER < 1700 /* Visual Studio 2010 does not have inttypes.h */
-#include <stdint.h>
-#define PRIX32 "X"
-#define PRIu32 "u"
-#define PRIX8  "X"
-#else
-#define __STDC_FORMAT_MACROS
-#include <stdint.h>
-#include <inttypes.h>
+  #define __STDC_FORMAT_MACROS
+  #include <inttypes.h>
 #endif
+
 #include <ctype.h>
+#include <stdlib.h>
+
+#if defined(__rtems__)
+  #include <rtems.h>
+  #if __RTEMS_MAJOR__ < 5
+    /* RTEMS has strncasecmp since version 5 */
+    #define NEED_strncasecmp
+  #endif
+#endif
 
 #ifdef _MSC_VER
-#define strncasecmp _strnicmp
+  /* Windows strncasecmp has a different name. */
+  #define strncasecmp _strnicmp
 #endif
 
-#if defined(vxWorks) || defined(__rtems__)
-// These systems have no strncasecmp at the moment
-// But avoid compiler errors in case strncasecmp exists in future versions
-static int mystrncasecmp(const char *s1, const char *s2, size_t n)
-{
-    int r=0;
-    while (n && (r = toupper(*s1)-toupper(*s2)) == 0) { n--; s1++; s2++; };
-    return r;
+#ifdef NEED_strncasecmp
+// Have no strncasecmp but avoid compiler errors in case it exists in future versions
+extern "C" {
+    static int mystrncasecmp(const char *s1, const char *s2, size_t n)
+    {
+        int r=0;
+        while (n && (r = toupper(*s1)-toupper(*s2)) == 0) { n--; s1++; s2++; };
+        return r;
+    }
 }
 #define strncasecmp mystrncasecmp
 #endif
@@ -534,6 +548,7 @@ static uint32_t leybold(const uint8_t* data, size_t len, uint32_t sum)
         sum += *data++;
     }
     sum = ~sum;
+    sum &= 0xff;
     if (sum < 32) sum+=32;
     return sum;
 }
@@ -731,7 +746,7 @@ printPseudo(const StreamFormat& format, StreamBuffer& output)
     const char* info = format.info;
     uint32_t init = extract<uint32_t>(info);
     uint32_t xorout = extract<uint32_t>(info);
-    uint_fast8_t fnum = extract<uint8_t>(info);
+    uint8_t fnum = extract<uint8_t>(info);
 
     size_t start = format.width;
     size_t length = output.length();
@@ -752,8 +767,8 @@ printPseudo(const StreamFormat& format, StreamBuffer& output)
     debug("ChecksumConverter %s: output checksum is 0x%" PRIX32 "\n",
         checksumMap[fnum].name, sum);
 
-    uint_fast8_t i;
-    uint_fast8_t outchar;
+    uint8_t i;
+    uint8_t outchar;
 
     if (format.flags & sign_flag) // decimal
     {
@@ -812,7 +827,7 @@ scanPseudo(const StreamFormat& format, StreamBuffer& input, size_t& cursor)
     uint32_t init = extract<uint32_t>(info);
     uint32_t xorout = extract<uint32_t>(info);
     size_t start = format.width;
-    uint_fast8_t fnum = extract<uint8_t>(info);
+    uint8_t fnum = extract<uint8_t>(info);
     size_t length = cursor;
     if (length >= start) length -= start;
     else length = 0;
@@ -824,7 +839,7 @@ scanPseudo(const StreamFormat& format, StreamBuffer& input, size_t& cursor)
     debug("ChecksumConverter %s: input to check: \"%s\n",
         checksumMap[fnum].name, input.expand(start,length)());
 
-    uint_fast8_t nDigits =
+    uint8_t nDigits =
         // get number of decimal digits from number of bytes: ceil(bytes*2.5)
         format.flags & sign_flag ? (checksumMap[fnum].bytes + 1) * 25 / 10 - 2 :
         format.flags & (zero_flag|left_flag) ? 2 * checksumMap[fnum].bytes :
@@ -867,7 +882,7 @@ scanPseudo(const StreamFormat& format, StreamBuffer& input, size_t& cursor)
     else
     if (format.flags & alt_flag) // lsb first (little endian)
     {
-        uint_fast8_t i;
+        uint8_t i;
         for (i = 0; i < checksumMap[fnum].bytes; i++)
         {
             if (format.flags & zero_flag) // ASCII
@@ -910,8 +925,8 @@ scanPseudo(const StreamFormat& format, StreamBuffer& input, size_t& cursor)
     }
     else // msb first (big endian)
     {
-        int_fast8_t i;
-        uint_fast8_t j;
+        int8_t i;
+        uint8_t j;
         for (i = checksumMap[fnum].bytes-1, j = 0; i >= 0; i--, j++)
         {
             if (format.flags & zero_flag) // ASCII

src/StreamBuffer.cc

@@ -102,7 +102,7 @@ init(const void* s, ssize_t minsize)
 }
 
 // How the buffer looks like:
-// |----free-----|####used####|--------00--------|
+// |----junk-----|####used####|--------00--------|
 ///|<--- offs -->|<-- len --->|<- cap-offs-len ->|
 // 0            offs      offs+len              cap
 //               |<-------------- minsize --------------->
@@ -254,39 +254,71 @@ replace(ssize_t remstart, ssize_t remlen, const void* ins, ssize_t inslen)
     if (inslen < 0) inslen = 0;
     size_t remend = remstart+remlen;
     size_t newlen = len+inslen-remlen;
+
+// How the buffer looks like before and after:
+// |---junk---|##content_start##|/////////remove_this////////|##content_end##|0000|
+// |<- offs ->|<-- remstart --->|<--------- remlen --------->|               |    |
+// |          |<--------------------- len ---------------------------------->|    |
+// 0         offs           offs+remstart                offs+remend    offs+len cap
+//
+// If content size stays the same, no need to move old content:
+// |---junk---|##content_start##|+++++++inserted_text++++++++|##content_end##|0000|
+//                              |<----- inslen==remlen ----->|         newlen==len
+//
+// If content shrinks (need to clear end of buffer):          |< clear this >|
+// |---junk---|##content_start##|inserted_text|##content_end##|00000000000000|0000|
+// 0         offs               |<- inslen -->|               |< len-newlen >|
+//                                                        offs+newlen    offs+len
+//
+// If content grows but still fits (make sure to keep at least one 0 byte at end):
+// |---junk---|##content_start##|++++++++inserted_text++++++++++|##content_end##|0|
+// |<- offs ->|<--------------------- newlen ---------------------------------->| |
+// 0         offs                                                           offs+newlen<cap
+//
+// If content would overflow, moving to offs 0 may help:
+// May need to clear end if newlen < offs+len:                       |<clear>|
+// |##content_start##|++++++++inserted_text++++++++++|##content_end##|0000000|0000|
+// |<--------------------- newlen ---------------------------------->|       |
+//                                                                newlen  offs+len
+// 
+// Otherwise we need to copy to a new buffer.
+
+
     if (cap <= newlen)
     {
-        // buffer too short
+        // buffer too short, copy to new buffer
         size_t newcap;
         for (newcap = sizeof(local)*2; newcap <= newlen; newcap *= 2);
         char* newbuffer = new char[newcap];
-        memcpy(newbuffer, buffer+offs, remstart);
-        memcpy(newbuffer+remstart, ins, inslen);
-        memcpy(newbuffer+remstart+inslen, buffer+offs+remend, len-remend);
-        memset(newbuffer+newlen, 0, newcap-newlen);
+        memcpy(newbuffer, buffer+offs, remstart);                           // copy content start
+        memcpy(newbuffer+remstart, ins, inslen);                            // insert
+        memcpy(newbuffer+remstart+inslen, buffer+offs+remend, len-remend);  // copy content end
+        memset(newbuffer+newlen, 0, newcap-newlen);                         // clear buffer end
         if (buffer != local)
-        {
-            delete [] buffer;
-        }
+            delete[] buffer;
         buffer = newbuffer;
         cap = newcap;
         offs = 0;
     }
     else
     {
-        if (newlen+offs<=cap)
+        if (offs+newlen < cap)
         {
-            // move to start of buffer
-            memmove(buffer+offs+remstart+inslen, buffer+offs+remend, len-remend);
-            memcpy(buffer+offs+remstart, ins, inslen);
-            if (newlen<len) memset(buffer+offs+newlen, 0, len-newlen);
+            // modified content still fits with current offs, just move content end
+            if (newlen != len)
+                memmove(buffer+offs+remstart+inslen, buffer+offs+remend, len-remend); // move old content end if necessary
+            memcpy(buffer+offs+remstart, ins, inslen);                                // insert before
+            if (newlen < len)
+                memset(buffer+offs+newlen, 0, len-newlen);                            // clear buffer end if content shrunk
         }
         else
         {
-            memmove(buffer,buffer+offs,remstart);
-            memmove(buffer+remstart+inslen, buffer+offs+remend, len-remend);
-            memcpy(buffer+remstart, ins, inslen);
-            if (newlen<len) memset(buffer+newlen, 0, len-newlen);
+            // move content to start of buffer
+            memmove(buffer, buffer+offs, remstart);                                   // move content start to 0 offs
+            memmove(buffer+remstart+inslen, buffer+offs+remend, len-remend);          // move content end
+            memcpy(buffer+remstart, ins, inslen);                                     // insert in between
+            if (newlen < offs+len)
+                memset(buffer+newlen, 0, offs+len-newlen);                            // clear buffer end if necessary
             offs = 0;
         }
     }
@@ -358,7 +390,7 @@ dump() const
     StreamBuffer result;
     size_t i;
     result.print("%" P "d,%" P "d,%" P "d:", offs, len, cap);
-    if (offs) result.print(ansiEscape(ANSI_BG_WHITE));
+    if (offs) result.print("%s", ansiEscape(ANSI_BG_WHITE));
     char c;
     for (i = 0; i < cap; i++)
     {

src/StreamCore.cc

@@ -603,6 +603,7 @@ evalOut()
     // flush all unread input
     unparsedInput = false;
     inputBuffer.clear();
+    inputLine.clear();
     if (!formatOutput())
     {
         finishProtocol(FormatError);
@@ -1011,6 +1012,7 @@ readCallback(StreamIoStatus status,
             finishProtocol(Fault);
             return 0;
     }
+    inputHook(input, size);
     inputBuffer.append(input, size);
     debug("StreamCore::readCallback(%s) inputBuffer=\"%s\", size %" Z "u\n",
         name(), inputBuffer.expand()(), inputBuffer.length());

src/StreamCore.h

@@ -219,6 +219,7 @@ protected:
 
 // virtual methods
     virtual void protocolStartHook() {}
+    virtual void inputHook(const void* input, size_t size) {};
     virtual void protocolFinishHook(ProtocolResult) {}
     virtual void startTimer(unsigned long timeout) = 0;
     virtual bool formatValue(const StreamFormat&, const void* fieldaddress) = 0;

src/StreamEpics.cc

@@ -25,6 +25,7 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdio.h>
 
 #if defined(vxWorks)
 #include <symLib.h>
@@ -136,6 +137,7 @@ class Stream : protected StreamCore
 #endif
 
 // StreamCore methods
+    void inputHook(const void* input, size_t size);
     void protocolFinishHook(ProtocolResult);
     void startTimer(unsigned long timeout);
     bool getFieldAddress(const char* fieldname,
@@ -933,6 +935,10 @@ process()
     debug("Stream::process(%s) start\n", name());
     status = NO_ALARM;
     convert = OK;
+    if (record->tpro)
+    {
+        StreamDebugClass(record->name).print("start protocol '%s'\n", protocolname());
+    }
     if (!startProtocol(record->proc == 2 ? StreamCore::StartInit : StreamCore::StartNormal))
     {
         debug("Stream::process(%s): could not start %sprotocol, status=%s (%d)\n",
@@ -1027,11 +1033,26 @@ expire(const epicsTime&)
 
 // StreamCore virtual methods ////////////////////////////////////////////
 
+void Stream::
+inputHook(const void* input, size_t size)
+{
+    if (record->tpro > 1)
+    {
+        StreamDebugClass(record->name).print("received \"%s\"\n",
+            StreamBuffer(input, size).expand()());
+    }
+}
+
 void Stream::
 protocolFinishHook(ProtocolResult result)
 {
     debug("Stream::protocolFinishHook(%s, %s)\n",
         name(), toStr(result));
+    if (record->tpro)
+    {
+        StreamDebugClass(record->name).print("%s. out=\"%s\", in=\"%s\"\n",
+            toStr(result), outputLine.expand()(), inputLine.expand()());
+    }
     switch (result)
     {
         case Success:

src/StreamError.cc

@@ -171,8 +171,6 @@ print(const char* fmt, ...)
 {
     va_list args;
     va_start(args, fmt);
-    const char* f = strrchr(file, '/');
-    if (f) f++; else f = file;
     FILE* fp = StreamDebugFile ? StreamDebugFile : stderr;
     if (streamMsgTimeStamped)
     {
@@ -184,7 +182,13 @@ print(const char* fmt, ...)
     {
         fprintf(fp, "%s ", StreamGetThreadNameFunction());
     }
-    fprintf(fp, "%s:%d: ", f, line);
+    if (file) {
+        const char* f = strrchr(file, '/');
+        if (f) f++; else f = file;
+        fprintf(fp, "%s:", f);
+        if (line) fprintf(fp, "%d:", line);
+        fprintf(fp, " ");
+    }
     vfprintf(fp, fmt, args);
     fflush(fp);
     va_end(args);

src/StreamError.h

@@ -56,19 +56,15 @@ class StreamDebugClass
     const char* file;
     int line;
 public:
-    StreamDebugClass(const char* file, int line) :
+    StreamDebugClass(const char* file = NULL, int line = 0) :
         file(file), line(line) {}
     int print(const char* fmt, ...)
         __attribute__((__format__(__printf__,2,3)));
 };
 
-inline StreamDebugClass
-StreamDebugObject(const char* file, int line)
-{ return StreamDebugClass(file, line); }
-
 #define error StreamError
-#define debug (!streamDebug)?0:StreamDebugObject(__FILE__,__LINE__).print
-#define debug2 (streamDebug<2)?0:StreamDebugObject(__FILE__,__LINE__).print
+#define debug (!streamDebug)?0:StreamDebugClass(__FILE__,__LINE__).print
+#define debug2 (streamDebug<2)?0:StreamDebugClass(__FILE__,__LINE__).print
 
 /*
  * ANSI escape sequences for terminal output

streamApp/simple.proto

@@ -19,7 +19,7 @@
 # along with StreamDevice. If not, see https://www.gnu.org/licenses/.
 #########################################################################/
 
-terminator = CR LF;
+terminator = LF;
 
 cmd {
     out "%s";