CMake: Add TIMESTAMP subcommand to string and file commands

1 files changed, 134 insertions, 0 deletions

diff --git a/Source/cmTimestamp.cxx b/Source/cmTimestamp.cxx
new file mode 100644
index 0000000..f1115e6
--- /dev/null
+++ b/Source/cmTimestamp.cxx
@@ -0,0 +1,134 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2012 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#include "cmTimestamp.h"
+
+#include <cstring>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+//----------------------------------------------------------------------------
+std::string cmTimestamp::CurrentTime(
+  const std::string& formatString, bool utcFlag)
+{
+  time_t currentTimeT = time(0);
+  if(currentTimeT == time_t(-1)) return std::string();
+
+  return CreateTimestampFromTimeT(currentTimeT, formatString, utcFlag);
+}
+
+std::string cmTimestamp::FileModificationTime(const char* path,
+  const std::string& formatString, bool utcFlag)
+{
+#ifdef _WIN32
+  struct _stat info;
+  std::memset(&info, 0, sizeof(info));
+
+  if(_stat(path, &info) != 0)
+    return std::string();
+
+  time_t currentTimeT = info.st_mtime;
+#else
+  struct stat info;
+  std::memset(&info, 0, sizeof(info));
+
+  if(stat(path, &info) != 0)
+    return std::string();
+
+  time_t currentTimeT = info.st_mtime;
+#endif
+
+  return CreateTimestampFromTimeT(currentTimeT, formatString, utcFlag);
+}
+
+std::string cmTimestamp::CreateTimestampFromTimeT(time_t timeT,
+    std::string formatString, bool utcFlag)
+{
+  if(formatString.empty())
+    {
+    formatString = "%Y-%m-%dT%H:%M:%S";
+    if(utcFlag) formatString += "Z";
+    }
+
+  struct tm timeStruct;
+  std::memset(&timeStruct, 0, sizeof(timeStruct));
+
+  if(utcFlag)
+    {
+  tm* ptr = gmtime(&timeT);
+  if(ptr == 0) return std::string();
+
+    timeStruct = *ptr;
+    }
+  else
+    {
+  struct tm* ptr = localtime(&timeT);
+  if(ptr == 0) return std::string();
+
+    timeStruct = *ptr;
+    }
+
+  std::string result;
+  for(std::string::size_type i = 0; i < formatString.size(); ++i)
+    {
+    char c1 = formatString[i];
+    char c2 = (i+1 < formatString.size()) ?
+      formatString[i+1] : 0;
+
+    if(c1 == '%' && c2 != 0)
+      {
+      result += AddTimestampComponent(c2, timeStruct);
+      ++i;
+      }
+    else
+      {
+      result += c1;
+      }
+    }
+
+  return result;
+}
+
+//----------------------------------------------------------------------------
+std::string cmTimestamp::AddTimestampComponent(
+  char flag, struct tm& timeStruct)
+{
+  std::string formatString = "%";
+  formatString += flag;
+
+  switch(flag)
+    {
+    case 'd':
+    case 'H':
+    case 'I':
+    case 'j':
+    case 'm':
+    case 'M':
+    case 'S':
+    case 'U':
+    case 'w':
+    case 'y':
+    case 'Y':
+      break;
+    default:
+      {
+      return formatString;
+      }
+    }
+
+  char buffer[16];
+
+  size_t size = strftime(buffer, sizeof(buffer),
+    formatString.c_str(), &timeStruct);
+
+  return std::string(buffer, size);
+}