cmSystemTools: Add callback for Stderr

Factor a common callback type out of StdoutCallback.  Add an equivalent
StderrCallback.  While at it, use "size_t" for the data length instead
of "int".

Teach "ctest --build-and-test" to capture the Stderr callback because
output sent through it is part of the logical CMake process output.

1 files changed, 11 insertions, 6 deletions

diff --git a/Source/cmSystemTools.h b/Source/cmSystemTools.h
index 979551c..4455dd1 100644
--- a/Source/cmSystemTools.h
+++ b/Source/cmSystemTools.h
@@ -77,14 +77,17 @@ public:
    */
   static void Message(const char* m, const char* title=0);
 
+  typedef void (*OutputCallback)(const char*, size_t length, void*);
+
   ///! Send a string to stdout
   static void Stdout(const char* s);
-  static void Stdout(const char* s, int length);
-  typedef  void (*StdoutCallback)(const char*, int length, void*);
-  static void SetStdoutCallback(StdoutCallback, void* clientData=0);
+  static void Stdout(const char* s, size_t length);
+  static void SetStdoutCallback(OutputCallback, void* clientData=0);
 
-  ///! Send a string to stderr. Stdout callbacks will not be invoced.
-  static void Stderr(const char* s, int length);
+  ///! Send a string to stderr
+  static void Stderr(const char* s);
+  static void Stderr(const char* s, size_t length);
+  static void SetStderrCallback(OutputCallback, void* clientData=0);
 
 
   typedef bool (*InterruptCallback)(void*);
@@ -471,10 +474,12 @@ private:
   static bool s_DisableMessages;
   static bool s_DisableRunCommandOutput;
   static MessageCallback s_MessageCallback;
-  static StdoutCallback s_StdoutCallback;
+  static OutputCallback s_StdoutCallback;
+  static OutputCallback s_StderrCallback;
   static InterruptCallback s_InterruptCallback;
   static void* s_MessageCallbackClientData;
   static void* s_StdoutCallbackClientData;
+  static void* s_StderrCallbackClientData;
   static void* s_InterruptCallbackClientData;
 };