--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Core/Compression/ZipWriter.cpp	Mon Sep 24 10:33:41 2012 +0200
@@ -0,0 +1,160 @@
+#include "ZipWriter.h"
+
+#include <contrib/minizip/zip.h>
+#include <boost/date_time/posix_time/posix_time.hpp>
+
+#include "../OrthancException.h"
+
+
+static void PrepareFileInfo(zip_fileinfo& zfi)
+{
+  memset(&zfi, 0, sizeof(zfi));
+
+  using namespace boost::posix_time;
+  ptime now = second_clock::local_time();
+
+  boost::gregorian::date today = now.date();
+  ptime midnight(today);
+
+  time_duration sinceMidnight = now - midnight;
+  zfi.tmz_date.tm_sec = sinceMidnight.seconds();  // seconds after the minute - [0,59]
+  zfi.tmz_date.tm_min = sinceMidnight.minutes();  // minutes after the hour - [0,59]
+  zfi.tmz_date.tm_hour = sinceMidnight.hours();  // hours since midnight - [0,23]
+
+  // http://www.boost.org/doc/libs/1_35_0/doc/html/boost/gregorian/greg_day.html
+  zfi.tmz_date.tm_mday = today.day();  // day of the month - [1,31]
+
+  // http://www.boost.org/doc/libs/1_35_0/doc/html/boost/gregorian/greg_month.html
+  zfi.tmz_date.tm_mon = today.month() - 1;  // months since January - [0,11]
+
+  // http://www.boost.org/doc/libs/1_35_0/doc/html/boost/gregorian/greg_year.html
+  zfi.tmz_date.tm_year = today.year();  // years - [1980..2044]
+}
+
+
+
+namespace Orthanc
+{
+  struct ZipWriter::PImpl
+  {
+    zipFile file_;
+  };
+
+  ZipWriter::ZipWriter() : pimpl_(new PImpl)
+  {
+    compressionLevel_ = 6;
+    hasFileInZip_ = false;
+
+    pimpl_->file_ = NULL;
+  }
+
+  ZipWriter::~ZipWriter()
+  {
+    Close();
+  }
+
+  void ZipWriter::Close()
+  {
+    if (IsOpen())
+    {
+      zipClose(pimpl_->file_, "Created by Orthanc");
+      pimpl_->file_ = NULL;
+      hasFileInZip_ = false;
+    }
+  }
+
+  bool ZipWriter::IsOpen() const
+  {
+    return pimpl_->file_ != NULL;
+  }
+
+  void ZipWriter::Open()
+  {
+    if (IsOpen())
+    {
+      return;
+    }
+
+    if (path_.size() == 0)
+    {
+      throw OrthancException("Please call SetOutputPath() before creating the file");
+    }
+
+    hasFileInZip_ = false;
+    pimpl_->file_ = zipOpen64(path_.c_str(), APPEND_STATUS_CREATE);
+    if (!pimpl_->file_)
+    {
+      throw OrthancException(ErrorCode_CannotWriteFile);
+    }
+  }
+
+  void ZipWriter::SetOutputPath(const char* path)
+  {
+    Close();
+    path_ = path;
+  }
+
+  void ZipWriter::SetCompressionLevel(uint8_t level)
+  {
+    if (level >= 10)
+    {
+      throw OrthancException("ZIP compression level must be between 0 (no compression) and 9 (highest compression");
+    }
+
+    compressionLevel_ = level;
+  }
+
+  void ZipWriter::CreateFileInZip(const char* path)
+  {
+    Open();
+
+    zip_fileinfo zfi;
+    PrepareFileInfo(zfi);
+
+    if (zipOpenNewFileInZip64(pimpl_->file_, path,
+                              &zfi,
+                              NULL,   0,
+                              NULL,   0,
+                              "",  // Comment
+                              Z_DEFLATED,
+                              compressionLevel_, 1) != 0)
+    {
+      throw OrthancException(ErrorCode_CannotWriteFile);
+    }
+
+    hasFileInZip_ = true;
+  }
+
+
+  void ZipWriter::Write(const std::string& data)
+  {
+    if (data.size())
+    {
+      Write(&data[0], data.size());
+    }
+  }
+
+
+  void ZipWriter::Write(const char* data, size_t length)
+  {
+    if (!hasFileInZip_)
+    {
+      throw OrthancException("Call first CreateFileInZip()");
+    }
+
+    const size_t maxBytesInAStep = std::numeric_limits<int32_t>::max();
+
+    while (length > 0)
+    {
+      int bytes = static_cast<int32_t>(length <= maxBytesInAStep ? length : maxBytesInAStep);
+
+      if (zipWriteInFileInZip(pimpl_->file_, data, bytes))
+      {
+        throw OrthancException(ErrorCode_CannotWriteFile);
+      }
+      
+      data += bytes;
+      length -= bytes;
+    }
+  }
+}