2007-08-08 Tatsuhiro Tsujikawa <tujikawa at rednoah dot com>

	MessageDigestHelper is introduced in order to simplify the use
	of message digest. Removed repeated code.
	The message digest algorithm is now specified by string, like 
"sha1",
	"md5".
	* src/messageDigest.{h, cc}
	* src/MessageDigestHelper.{h, cc}: New class.
	* src/DefaultPieceStorage.cc
	* src/DefaultBtContext.{h, cc}
	(computeFastSet): New function.
	(setInfoHash): Added for unit testing.
	(setNumPieces): Added for unit testing.
	* src/DefaultBtInteractive.cc
	* src/BtPieceMessage.cc
	* src/Peer.cc
	* src/Checksum.h
	* src/message.h
	* src/IteratableChecksumValidator.h
	* src/ChunkChecksumValidator.{h, cc}: Use 
IteratableChecksumValidator
	inside it.
	* src/SegmentMan.{h, cc}
	(checkIntegrity): Removed.
	* src/IteratableChunkChecksumValidator.{h, cc}
	* src/Util.h
	(sha1Sum): Removed.
	(simpleMessageDigest): Removed.
	(fileChecksum): Removed.
	(computeFastSet): Removed.
	* src/ShaVisitor.cc
	* src/ChunkChecksum.h
	* src/DownloadCommand.cc

	Removed messageDigest virtual functions.
	* src/MultiDiskAdaptor.{h, cc}
	* src/DiskAdaptor.h
	* src/ByteArrayDiskWriter.h
	* src/DiskWriter.h
	* src/DiskAdaptorWriter.h
	* src/AbstractSingleDiskAdaptor.{h, cc}
	* src/AbstractDiskWriter.{h, cc}
	
	Fixed comilation error when message digest is disabled.
	* src/MetalinkEntry.{h, cc}
	* src/MetalinkRequestInfo.cc
	
	Removed srandom and random.
	* src/SimpleRandomizer.h

	Added size() virtual function to DiskAdaptor
	* src/MultiDiskAdaptor.h

	Fixed the bug that causes that files are not opened correctly in
	multi-file torrent.
	* src/TorrentRequestInfo.cc
	* src/MultiDiskAdaptor.cc
	
	Added SHA256 support
	* src/messageDigest.cc
	* src/Xml2MetalinkProcessor.cc

	Show supported message digest algorithms
	* src/main.cc

	Updated contact info.
	* src/main.cc

1 files changed, 1 insertions, 30 deletions

diff --git a/src/AbstractDiskWriter.cc b/src/AbstractDiskWriter.cc
index d6fec83d..943e0e76 100644
--- a/src/AbstractDiskWriter.cc
+++ b/src/AbstractDiskWriter.cc
@@ -113,36 +113,6 @@ int32_t AbstractDiskWriter::readDataInternal(char* data, int32_t len) {
   return read(fd, data, len);
 }
 
-#ifdef ENABLE_MESSAGE_DIGEST
-string AbstractDiskWriter::messageDigest(int64_t offset, int64_t length,
-					 const MessageDigestContext::DigestAlgo& algo)
-{
-  MessageDigestContext ctx(algo);
-  ctx.digestInit();
-
-  int32_t BUFSIZE = 16*1024;
-  char buf[BUFSIZE];
-  for(int64_t i = 0; i < length/BUFSIZE; i++) {
-    if(BUFSIZE != readData(buf, BUFSIZE, offset)) {
-      throw new DlAbortEx(EX_FILE_SHA1SUM, filename.c_str(), strerror(errno));
-    }
-    ctx.digestUpdate(buf, BUFSIZE);
-    offset += BUFSIZE;
-  }
-  int32_t r = length%BUFSIZE;
-  if(r > 0) {
-    if(r != readData(buf, r, offset)) {
-      throw new DlAbortEx(EX_FILE_SHA1SUM, filename.c_str(), strerror(errno));
-    }
-    ctx.digestUpdate(buf, r);
-  }
-  unsigned char hashValue[20];
-  ctx.digestFinal(hashValue);
-
-  return Util::toHex(hashValue, 20);
-}
-#endif // ENABLE_MESSAGE_DIGEST
-
 void AbstractDiskWriter::seek(int64_t offset) {
   if(offset != lseek(fd, offset, SEEK_SET)) {
     throw new DlAbortEx(EX_FILE_SEEK, filename.c_str(), strerror(errno));
@@ -170,6 +140,7 @@ void AbstractDiskWriter::truncate(int64_t length)
   ftruncate(fd, length);
 }
 
+// TODO the file descriptor fd must be opened before calling this function.
 int64_t AbstractDiskWriter::size() const
 {
   struct stat fileStat;