Allow protoc to output directly to zip/jar/par/war files.

src/Makefile.am

@@ -131,6 +131,8 @@ libprotoc_la_SOURCES =                                         \
   google/protobuf/compiler/plugin.pb.cc                        \
   google/protobuf/compiler/subprocess.cc                       \
   google/protobuf/compiler/subprocess.h                        \
+  google/protobuf/compiler/zip_writer.cc                       \
+  google/protobuf/compiler/zip_writer.h                        \
   google/protobuf/compiler/cpp/cpp_enum.cc                     \
   google/protobuf/compiler/cpp/cpp_enum.h                      \
   google/protobuf/compiler/cpp/cpp_enum_field.cc               \

src/google/protobuf/compiler/command_line_interface.cc

@@ -52,6 +52,7 @@
 #include <google/protobuf/compiler/code_generator.h>
 #include <google/protobuf/compiler/plugin.pb.h>
 #include <google/protobuf/compiler/subprocess.h>
+#include <google/protobuf/compiler/zip_writer.h>
 #include <google/protobuf/descriptor.h>
 #include <google/protobuf/text_format.h>
 #include <google/protobuf/dynamic_message.h>
@@ -155,7 +156,7 @@ bool VerifyDirectoryExists(const string& path) {
 // parent if necessary, and so on.  The full file name is actually
 // (prefix + filename), but we assume |prefix| already exists and only create
 // directories listed in |filename|.
-void TryCreateParentDirectory(const string& prefix, const string& filename) {
+bool TryCreateParentDirectory(const string& prefix, const string& filename) {
   // Recursively create parent directories to the output file.
   vector<string> parts;
   SplitStringUsing(filename, "/", &parts);
@@ -166,11 +167,13 @@ void TryCreateParentDirectory(const string& prefix, const string& filename) {
       if (errno != EEXIST) {
         cerr << filename << ": while trying to create directory "
              << path_so_far << ": " << strerror(errno) << endl;
-        return;
+        return false;
       }
     }
     path_so_far += '/';
   }
+
+  return true;
 }
 
 }  // namespace
@@ -222,7 +225,8 @@ class CommandLineInterface::MemoryOutputDirectory : public OutputDirectory {
   MemoryOutputDirectory();
   ~MemoryOutputDirectory();
 
-  bool WriteAllToDisk();
+  bool WriteAllToDisk(const string& prefix);
+  bool WriteAllToZip(const string& filename);
 
   // implements OutputDirectory --------------------------------------
   io::ZeroCopyOutputStream* Open(const string& filename);
@@ -232,36 +236,12 @@ class CommandLineInterface::MemoryOutputDirectory : public OutputDirectory {
  private:
   friend class MemoryOutputStream;
 
-  hash_map<string, string*> files_;
+  // map instead of hash_map so that files are written in order (good when
+  // writing zips).
+  map<string, string*> files_;
   bool had_error_;
 };
 
-// OutputDirectory that just adds some prefix to every file name.
-class CommandLineInterface::SubOutputDirectory : public OutputDirectory {
- public:
-  SubOutputDirectory(OutputDirectory* parent, const string& prefix)
-      : parent_(parent), prefix_(prefix) {}
-  ~SubOutputDirectory() {}
-
-  // implements OutputDirectory --------------------------------------
-  io::ZeroCopyOutputStream* Open(const string& filename) {
-    // TODO(kenton):  This is not the cleanest place to deal with creation of
-    //   parent directories, but it does the right thing given the way this
-    //   class is used, and this class is private to this file anyway, so it's
-    //   probably not worth fixing for now.
-    TryCreateParentDirectory(prefix_, filename);
-    return parent_->Open(prefix_ + filename);
-  }
-  io::ZeroCopyOutputStream* OpenForInsert(
-      const string& filename, const string& insertion_point) {
-    return parent_->OpenForInsert(prefix_ + filename, insertion_point);
-  }
-
- private:
-  OutputDirectory* parent_;
-  string prefix_;
-};
-
 class CommandLineInterface::MemoryOutputStream
     : public io::ZeroCopyOutputStream {
  public:
@@ -297,17 +277,27 @@ CommandLineInterface::MemoryOutputDirectory::~MemoryOutputDirectory() {
   STLDeleteValues(&files_);
 }
 
-bool CommandLineInterface::MemoryOutputDirectory::WriteAllToDisk() {
+bool CommandLineInterface::MemoryOutputDirectory::WriteAllToDisk(
+    const string& prefix) {
   if (had_error_) {
     return false;
   }
 
-  for (hash_map<string, string*>::const_iterator iter = files_.begin();
+  if (!VerifyDirectoryExists(prefix)) {
+    return false;
+  }
+
+  for (map<string, string*>::const_iterator iter = files_.begin();
        iter != files_.end(); ++iter) {
-    const string& filename = iter->first;
+    const string& relative_filename = iter->first;
     const char* data = iter->second->data();
     int size = iter->second->size();
 
+    if (!TryCreateParentDirectory(prefix, relative_filename)) {
+      return false;
+    }
+    string filename = prefix + relative_filename;
+
     // Create the output file.
     int file_descriptor;
     do {
@@ -362,6 +352,47 @@ bool CommandLineInterface::MemoryOutputDirectory::WriteAllToDisk() {
   return true;
 }
 
+bool CommandLineInterface::MemoryOutputDirectory::WriteAllToZip(
+    const string& filename) {
+  if (had_error_) {
+    return false;
+  }
+
+  // Create the output file.
+  int file_descriptor;
+  do {
+    file_descriptor =
+      open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666);
+  } while (file_descriptor < 0 && errno == EINTR);
+
+  if (file_descriptor < 0) {
+    int error = errno;
+    cerr << filename << ": " << strerror(error);
+    return false;
+  }
+
+  // Create the ZipWriter
+  io::FileOutputStream stream(file_descriptor);
+  ZipWriter zip_writer(&stream);
+
+  for (map<string, string*>::const_iterator iter = files_.begin();
+       iter != files_.end(); ++iter) {
+    zip_writer.Write(iter->first, *iter->second);
+  }
+
+  zip_writer.WriteDirectory();
+
+  if (stream.GetErrno() != 0) {
+    cerr << filename << ": " << strerror(stream.GetErrno()) << endl;
+  }
+
+  if (!stream.Close()) {
+    cerr << filename << ": " << strerror(stream.GetErrno()) << endl;
+  }
+
+  return true;
+}
+
 io::ZeroCopyOutputStream* CommandLineInterface::MemoryOutputDirectory::Open(
     const string& filename) {
   return new MemoryOutputStream(this, filename);
@@ -552,19 +583,51 @@ int CommandLineInterface::Run(int argc, const char* const argv[]) {
     }
   }
 
+  // We construct a separate OutputDirectory for each output location.  Note
+  // that two code generators may output to the same location, in which case
+  // they should share a single OutputDirectory (so that OpenForInsert() works).
+  typedef hash_map<string, MemoryOutputDirectory*> OutputDirectoryMap;
+  OutputDirectoryMap output_directories_;
+
   // Generate output.
   MemoryOutputDirectory output_directory;
   if (mode_ == MODE_COMPILE) {
     for (int i = 0; i < output_directives_.size(); i++) {
-      if (!GenerateOutput(parsed_files, output_directives_[i],
-                          &output_directory)) {
+      string output_location = output_directives_[i].output_location;
+      cout << "location: " << output_location << endl;
+      if (!HasSuffixString(output_location, ".zip") &&
+          !HasSuffixString(output_location, ".jar") &&
+          !HasSuffixString(output_location, ".war") &&
+          !HasSuffixString(output_location, ".par")) {
+        AddTrailingSlash(&output_location);
+      }
+      MemoryOutputDirectory** map_slot = &output_directories_[output_location];
+
+      if (*map_slot == NULL) {
+        // First time we've seen this output location.
+        *map_slot = new MemoryOutputDirectory;
+      }
+
+      if (!GenerateOutput(parsed_files, output_directives_[i], *map_slot)) {
         return 1;
       }
     }
   }
 
-  if (!output_directory.WriteAllToDisk()) {
-    return 1;
+  // Write all output to disk.
+  for (OutputDirectoryMap::iterator iter = output_directories_.begin();
+       iter != output_directories_.end(); ++iter) {
+    const string& location = iter->first;
+    MemoryOutputDirectory* directory = iter->second;
+    if (HasSuffixString(location, "/")) {
+      if (!directory->WriteAllToDisk(location)) {
+        return 1;
+      }
+    } else {
+      if (!directory->WriteAllToZip(location)) {
+        return 1;
+      }
+    }
   }
 
   if (!descriptor_set_name_.empty()) {
@@ -1009,15 +1072,7 @@ void CommandLineInterface::PrintHelpText() {
 bool CommandLineInterface::GenerateOutput(
     const vector<const FileDescriptor*>& parsed_files,
     const OutputDirective& output_directive,
-    OutputDirectory* parent_output_directory) {
-  // Set up the OutputDirectory.
-  string path = output_directive.output_location;
-  AddTrailingSlash(&path);
-  if (!VerifyDirectoryExists(path)) {
-    return false;
-  }
-  SubOutputDirectory output_directory(parent_output_directory, path);
-
+    OutputDirectory* output_directory) {
   // Call the generator.
   string error;
   if (output_directive.generator == NULL) {
@@ -1032,7 +1087,7 @@ bool CommandLineInterface::GenerateOutput(
 
     if (!GeneratePluginOutput(parsed_files, plugin_name,
                               output_directive.parameter,
-                              &output_directory, &error)) {
+                              output_directory, &error)) {
       cerr << output_directive.name << ": " << error << endl;
       return false;
     }
@@ -1041,7 +1096,7 @@ bool CommandLineInterface::GenerateOutput(
     for (int i = 0; i < parsed_files.size(); i++) {
       if (!output_directive.generator->Generate(
           parsed_files[i], output_directive.parameter,
-          &output_directory, &error)) {
+          output_directory, &error)) {
         // Generator returned an error.
         cerr << output_directive.name << ": " << parsed_files[i]->name() << ": "
              << error << endl;

src/google/protobuf/compiler/command_line_interface.h

@@ -175,7 +175,6 @@ class LIBPROTOC_EXPORT CommandLineInterface {
 
   class ErrorPrinter;
   class MemoryOutputDirectory;
-  class SubOutputDirectory;
   class MemoryOutputStream;
 
   // Clear state from previous Run().
@@ -213,7 +212,7 @@ class LIBPROTOC_EXPORT CommandLineInterface {
   struct OutputDirective;  // see below
   bool GenerateOutput(const vector<const FileDescriptor*>& parsed_files,
                       const OutputDirective& output_directive,
-                      OutputDirectory* parent_output_directory);
+                      OutputDirectory* output_directory);
   bool GeneratePluginOutput(const vector<const FileDescriptor*>& parsed_files,
                             const string& plugin_name,
                             const string& parameter,

src/google/protobuf/compiler/zip_writer.cc

+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Author: ambrose@google.com (Ambrose Feinstein),
+//         kenton@google.com (Kenton Varda)
+//
+// Based on http://www.pkware.com/documents/casestudies/APPNOTE.TXT
+
+#include <google/protobuf/compiler/zip_writer.h>
+#include <google/protobuf/io/coded_stream.h>
+
+namespace google {
+namespace protobuf {
+namespace compiler {
+
+static const uint32 kCRC32Table[256] = {
+  0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
+  0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+  0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
+  0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+  0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+  0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+  0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
+  0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+  0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
+  0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+  0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
+  0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+  0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
+  0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+  0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+  0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+  0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
+  0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+  0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
+  0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+  0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
+  0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+  0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
+  0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+  0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+  0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+  0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
+  0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+  0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
+  0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+  0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
+  0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+  0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
+  0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+  0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+  0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+  0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
+  0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+  0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
+  0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+  0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
+  0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+  0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
+};
+
+// XXX this appears to be broken, but unzip -t accepts it anyway?  wtff?
+static uint32 ComputeCRC32(const string &buf) {
+  uint32 x = ~0U;
+  for (int i = 0; i < buf.size(); ++i) {
+    unsigned char c = buf[i];
+    x = kCRC32Table[(x ^ c) & 0xff] ^ (x >> 8);
+  }
+  return ~x;
+}
+
+static void WriteShort(io::CodedOutputStream *out, uint16 val) {
+  uint8 p[2];
+  p[0] = static_cast<uint8>(val);
+  p[1] = static_cast<uint8>(val >> 8);
+  out->WriteRaw(p, 2);
+}
+
+ZipWriter::ZipWriter(io::ZeroCopyOutputStream* raw_output)
+  : raw_output_(raw_output) {}
+ZipWriter::~ZipWriter() {}
+
+bool ZipWriter::Write(const string& filename, const string& contents) {
+  FileInfo info;
+
+  info.name = filename;
+  uint16 filename_size = filename.size();  // XXX check conversion
+  info.offset = raw_output_->ByteCount();  // XXX check conversion
+  info.size = contents.size();  // XXX check conversion
+  info.crc32 = ComputeCRC32(contents);
+
+  files_.push_back(info);
+
+  // write file header
+  io::CodedOutputStream output(raw_output_);
+  output.WriteLittleEndian32(0x04034b50);  // magic
+  WriteShort(&output, 10);  // version needed to extract
+  WriteShort(&output, 0);  // flags
+  WriteShort(&output, 0);  // compression method: stored
+  WriteShort(&output, 0);  // last modified time
+  WriteShort(&output, 0);  // last modified date
+  output.WriteLittleEndian32(info.crc32);  // crc-32
+  output.WriteLittleEndian32(info.size);  // compressed size
+  output.WriteLittleEndian32(info.size);  // uncompressed size
+  WriteShort(&output, filename_size);  // file name length
+  WriteShort(&output, 0);   // extra field length
+  output.WriteString(filename);  // file name
+  output.WriteString(contents);  // file data
+
+  return !output.HadError();
+}
+
+bool ZipWriter::WriteDirectory() {
+  uint16 num_entries = files_.size();  // XXX check conversion
+  uint32 dir_ofs = raw_output_->ByteCount();  // XXX check conversion
+
+  // write central directory
+  io::CodedOutputStream output(raw_output_);
+  for (int i = 0; i < num_entries; ++i) {
+    const string &filename = files_[i].name;
+    uint16 filename_size = filename.size();  // XXX check conversion
+    uint32 crc32 = files_[i].crc32;
+    uint32 size = files_[i].size;
+    uint32 offset = files_[i].offset;
+
+    output.WriteLittleEndian32(0x02014b50);  // magic
+    WriteShort(&output, 10);  // version made by
+    WriteShort(&output, 10);  // version needed to extract
+    WriteShort(&output, 0);  // flags
+    WriteShort(&output, 0);  // compression method: stored
+    WriteShort(&output, 0);  // last modified time
+    WriteShort(&output, 0);  // last modified date
+    output.WriteLittleEndian32(crc32);  // crc-32
+    output.WriteLittleEndian32(size);  // compressed size
+    output.WriteLittleEndian32(size);  // uncompressed size
+    WriteShort(&output, filename_size);  // file name length
+    WriteShort(&output, 0);   // extra field length
+    WriteShort(&output, 0);   // file comment length
+    WriteShort(&output, 0);   // starting disk number
+    WriteShort(&output, 0);   // internal file attributes
+    output.WriteLittleEndian32(0);  // external file attributes
+    output.WriteLittleEndian32(offset);  // local header offset
+    output.WriteString(filename);  // file name
+  }
+  uint32 dir_len = output.ByteCount();  // XXX check conversion
+
+  // write end of central directory marker
+  output.WriteLittleEndian32(0x06054b50);  // magic
+  WriteShort(&output, 0);  // disk number
+  WriteShort(&output, 0);  // disk with start of central directory
+  WriteShort(&output, num_entries);  // central directory entries (this disk)
+  WriteShort(&output, num_entries);  // central directory entries (total)
+  output.WriteLittleEndian32(dir_len);  // central directory byte size
+  output.WriteLittleEndian32(dir_ofs);  // central directory offset
+  WriteShort(&output, 0);   // comment length
+
+  return output.HadError();
+}
+
+}  // namespace google
+}  // namespace protobuf
+}  // namespace compiler

src/google/protobuf/compiler/zip_writer.h

+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Author: kenton@google.com (Kenton Varda)
+
+#include <vector>
+#include <google/protobuf/stubs/common.h>
+#include <google/protobuf/io/zero_copy_stream.h>
+
+namespace google {
+namespace protobuf {
+namespace compiler {
+
+class ZipWriter {
+ public:
+  ZipWriter(io::ZeroCopyOutputStream* raw_output);
+  ~ZipWriter();
+
+  bool Write(const string& filename, const string& contents);
+  bool WriteDirectory();
+
+ private:
+  struct FileInfo {
+    string name;
+    uint32 offset;
+    uint32 size;
+    uint32 crc32;
+  };
+
+  io::ZeroCopyOutputStream* raw_output_;
+  vector<FileInfo> files_;
+};
+
+}  // namespace google
+}  // namespace protobuf
+}  // namespace compiler

vsprojects/libprotoc.vcproj

@@ -159,6 +159,10 @@
 				RelativePath="..\src\google\protobuf\compiler\subprocess.h"
 				>
 			</File>
+      <File
+        RelativePath="..\src\google\protobuf\compiler\zip_writer.h"
+        >
+      </File>
 			<File
 				RelativePath="..\src\google\protobuf\compiler\plugin.h"
 				>
@@ -287,6 +291,10 @@
 				RelativePath="..\src\google\protobuf\compiler\subprocess.cc"
 				>
 			</File>
+      <File
+        RelativePath="..\src\google\protobuf\compiler\zip_writer.cc"
+        >
+      </File>
 			<File
 				RelativePath="..\src\google\protobuf\compiler\plugin.cc"
 				>