Eliminate -Wconversion warnings.

Change types of local variables, or casting, or re-arrange
expressions to get rid of "conversion may alter value" warnings
as seen on recent dashboard submissions from londinium.kitware.

Source/CPack/cmCPackDebGenerator.cxx

@@ -135,7 +135,7 @@ int cmCPackDebGenerator::CompressFiles(const char* outFileName,
   // now add all directories which have to be compressed
   // collect all top level install dirs for that
   // e.g. /opt/bin/foo, /usr/bin/bar and /usr/bin/baz would give /usr and /opt
-  int topLevelLength = strlen(toplevel);
+  size_t topLevelLength = strlen(toplevel);
   std::set<std::string> installDirs;
   for (std::vector<std::string>::const_iterator fileIt = files.begin(); 
        fileIt != files.end(); ++ fileIt )
@@ -431,7 +431,7 @@ static int put_arobj(CF *cfp, struct stat *sb)
 
  /* If not truncating names and the name is too long or contains
   * a space, use extended format 1.   */
-  unsigned int lname = strlen(name);
+  size_t lname = strlen(name);
   uid_t uid = sb->st_uid;
   gid_t gid = sb->st_gid;
   if (uid > USHRT_MAX) {
@@ -441,7 +441,7 @@ static int put_arobj(CF *cfp, struct stat *sb)
     gid = USHRT_MAX;
     }
   if (lname > sizeof(hdr->ar_name) || strchr(name, ' '))
-    (void)sprintf(ar_hb, HDR1, AR_EFMT1, lname,
+    (void)sprintf(ar_hb, HDR1, AR_EFMT1, (int)lname,
                   (long int)sb->st_mtime, uid, gid, sb->st_mode,
                   (long long)sb->st_size + lname, ARFMAG);
     else {

Source/CPack/cmCPackNSISGenerator.cxx

@@ -758,7 +758,7 @@ CreateComponentDescription(cmCPackComponent *component,
     }
     
     // Create the NSIS code to download this file on-the-fly.
-    unsigned totalSizeInKbytes = (totalSize + 512) / 1024;
+    unsigned long totalSizeInKbytes = (totalSize + 512) / 1024;
     if (totalSizeInKbytes == 0)
       {
       totalSizeInKbytes = 1;

Source/CTest/cmCTestBuildHandler.cxx

@@ -959,7 +959,7 @@ int cmCTestBuildHandler::RunMakeCommand(const char* command,
   this->ProcessBuffer(0, 0, tick, tick_len, ofs,
     &this->BuildProcessingErrorQueue);
   cmCTestLog(this->CTest, OUTPUT, " Size of output: "
-    << int(this->BuildOutputLogSize / 1024.0) << "K" << std::endl);
+    << ((this->BuildOutputLogSize + 512) / 1024) << "K" << std::endl);
 
   // Properly handle output of the build command
   cmsysProcess_WaitForExit(cp, 0);
@@ -1171,7 +1171,7 @@ void cmCTestBuildHandler::ProcessBuffer(const char* data, int length,
     if ( tick % tick_line_len == 0 && tick > 0 )
       {
       cmCTestLog(this->CTest, HANDLER_OUTPUT, "  Size: "
-        << int((this->BuildOutputLogSize / 1024.0) + 1) << "K" << std::endl
+        << ((this->BuildOutputLogSize + 512) / 1024) << "K" << std::endl
         << "    ");
       }
     }

Source/CTest/cmCTestMultiProcessHandler.cxx

@@ -484,8 +484,9 @@ void cmCTestMultiProcessHandler::CreateTestCostList()
       }
     else //we ignore their cost
       {
-      this->TestCosts[this->Tests.size()
-        - this->Properties[i->first]->Index].insert(i->first);
+      size_t index = this->Tests.size()
+        - static_cast<size_t>(this->Properties[i->first]->Index);
+      this->TestCosts[index].insert(i->first);
       }
     }
 }

Source/CTest/cmCTestRunTest.cxx

@@ -83,7 +83,8 @@ void cmCTestRunTest::CompressOutput()
     reinterpret_cast<unsigned char*>(
     const_cast<char*>(this->ProcessOutput.c_str()));
   //zlib makes the guarantee that this is the maximum output size
-  int outSize = static_cast<int>(this->ProcessOutput.size() * 1.001 + 13);
+  int outSize = static_cast<int>(
+    static_cast<double>(this->ProcessOutput.size()) * 1.001 + 13.0);
   unsigned char* out = new unsigned char[outSize];
 
   strm.zalloc = Z_NULL;
@@ -342,13 +343,14 @@ bool cmCTestRunTest::EndTest(size_t completed, size_t total, bool started)
 //----------------------------------------------------------------------
 void cmCTestRunTest::ComputeWeightedCost()
 {
-  int prev = this->TestProperties->PreviousRuns;
-  float avgcost = this->TestProperties->Cost;
+  double prev = static_cast<double>(this->TestProperties->PreviousRuns);
+  double avgcost = static_cast<double>(this->TestProperties->Cost);
   double current = this->TestResult.ExecutionTime;
 
   if(this->TestResult.Status == cmCTestTestHandler::COMPLETED)
     {
-    this->TestProperties->Cost = ((prev * avgcost) + current) / (prev + 1);
+    this->TestProperties->Cost =
+      static_cast<float>(((prev * avgcost) + current) / (prev + 1.0));
     this->TestProperties->PreviousRuns++;
     }
 }
@@ -569,7 +571,7 @@ double cmCTestRunTest::ResolveTimeout()
     {
     stop_time += 24*60*60;
     }
-  int stop_timeout = (stop_time - current_time) % (24*60*60);
+  int stop_timeout = static_cast<int>(stop_time - current_time) % (24*60*60);
   this->CTest->LastStopTimeout = stop_timeout;
 
   if(stop_timeout <= 0 || stop_timeout > this->CTest->LastStopTimeout)

Source/CTest/cmCTestTestHandler.cxx

@@ -1048,7 +1048,7 @@ void cmCTestTestHandler::ProcessDirectory(std::vector<cmStdString> &passed,
 
     if(randomSchedule)
       {
-      p.Cost = rand();
+      p.Cost = static_cast<float>(rand());
       }
 
     if(p.Timeout == 0 && this->CTest->GetGlobalTimeout() != 0)
@@ -1309,7 +1309,8 @@ std::string cmCTestTestHandler::EncodeFile(std::string file)
   cmSystemTools::RemoveFile(tarFile.c_str());
 
   unsigned char *encoded_buffer
-    = new unsigned char [ static_cast<int>(len * 1.5 + 5) ];
+    = new unsigned char [ static_cast<int>(
+        static_cast<double>(len) * 1.5 + 5.0) ];
 
   unsigned long rlen
     = cmsysBase64_Encode(file_buffer, len, encoded_buffer, 1);
@@ -1881,7 +1882,8 @@ std::string cmCTestTestHandler::GenerateRegressionImages(
           unsigned char *file_buffer = new unsigned char [ len + 1 ];
           ifs.read(reinterpret_cast<char*>(file_buffer), len);
           unsigned char *encoded_buffer
-            = new unsigned char [ static_cast<int>(len * 1.5 + 5) ];
+            = new unsigned char [ static_cast<int>(
+                static_cast<double>(len) * 1.5 + 5.0) ];
 
           unsigned long rlen
             = cmsysBase64_Encode(file_buffer, len, encoded_buffer, 1);

Utilities/cmcompress/cmcompress.c

@@ -454,7 +454,7 @@ int cmcompress_compress(struct cmcompress_stream* cdata, void* buff, size_t n)
       {
       goto nomatch;
       }
-    disp = cdata->hsize_reg - i;    /* secondary hash (after G. Knott) */
+    disp = (int)(cdata->hsize_reg - i);    /* secondary hash (after G. Knott) */
     if ( i == 0 )
       {
       disp = 1;