ENH: Create cmProcessTools to parse child output

This class provides a RunProcess method to run a child process and send
its output to an abstract parsing interface.  This also provides a
simple line parser and logger implementing the parsing interface.

1 files changed, 93 insertions, 0 deletions

diff --git a/Source/cmProcessTools.cxx b/Source/cmProcessTools.cxx
new file mode 100644
index 0000000..ef40f57
--- /dev/null
+++ b/Source/cmProcessTools.cxx
@@ -0,0 +1,93 @@
+/*=========================================================================
+
+  Program:   CMake - Cross-Platform Makefile Generator
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
+  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+     PURPOSE.  See the above copyright notices for more information.
+
+=========================================================================*/
+#include "cmProcessTools.h"
+
+#include <cmsys/Process.h>
+
+//----------------------------------------------------------------------------
+void cmProcessTools::RunProcess(struct cmsysProcess_s* cp,
+                                OutputParser* out, OutputParser* err)
+{
+  cmsysProcess_Execute(cp);
+  char* data = 0;
+  int length = 0;
+  int p;
+  while((out||err) && (p=cmsysProcess_WaitForData(cp, &data, &length, 0), p))
+    {
+    if(out && p == cmsysProcess_Pipe_STDOUT)
+      {
+      if(!out->Process(data, length))
+        {
+        out = 0;
+        }
+      }
+    else if(err && p == cmsysProcess_Pipe_STDERR)
+      {
+      if(!err->Process(data, length))
+        {
+        err = 0;
+        }
+      }
+    }
+  cmsysProcess_WaitForExit(cp, 0);
+}
+
+
+//----------------------------------------------------------------------------
+cmProcessTools::LineParser::LineParser(char sep, bool ignoreCR):
+  Separator(sep), IgnoreCR(ignoreCR), Log(0), Prefix(0)
+{
+}
+
+//----------------------------------------------------------------------------
+void cmProcessTools::LineParser::SetLog(std::ostream* log, const char* prefix)
+{
+  this->Log = log;
+  this->Prefix = prefix? prefix : "";
+}
+
+//----------------------------------------------------------------------------
+bool cmProcessTools::LineParser::ProcessChunk(const char* first, int length)
+{
+  const char* last = first + length;
+  for(const char* c = first; c != last; ++c)
+    {
+    if(*c == this->Separator)
+      {
+      // Log this line.
+      if(this->Log && this->Prefix)
+        {
+        *this->Log << this->Prefix << this->Line << "\n";
+        }
+
+      // Hand this line to the subclass implementation.
+      if(!this->ProcessLine())
+        {
+        this->Line = "";
+        return false;
+        }
+
+      this->Line = "";
+      }
+    else if(*c != '\r' || !this->IgnoreCR)
+      {
+      // Append this character to the line under construction.
+      this->Line.append(1, *c);
+      }
+    }
+  return true;
+}