Fixed some typos in code comments

src/AppleTLSSession.h

@@ -58,7 +58,7 @@ public:
   virtual ~AppleTLSSession();
 
   // Initializes SSL/TLS session. The |sockfd| is the underlying
-  // tranport socket. This function returns TLS_ERR_OK if it
+  // transport socket. This function returns TLS_ERR_OK if it
   // succeeds, or TLS_ERR_ERROR.
   virtual int init(sock_t sockfd) CXX11_OVERRIDE;
 
@@ -81,12 +81,12 @@ public:
 
   // Sends |data| with length |len|. This function returns the number
   // of bytes sent if it succeeds, or TLS_ERR_WOULDBLOCK if the
-  // underlying tranport blocks, or TLS_ERR_ERROR.
+  // underlying transport blocks, or TLS_ERR_ERROR.
   virtual ssize_t writeData(const void* data, size_t len) CXX11_OVERRIDE;
 
   // Receives data into |data| with length |len|. This function returns
   // the number of bytes received if it succeeds, or TLS_ERR_WOULDBLOCK
-  // if the underlying tranport blocks, or TLS_ERR_ERROR.
+  // if the underlying transport blocks, or TLS_ERR_ERROR.
   virtual ssize_t readData(void* data, size_t len) CXX11_OVERRIDE;
 
   // Performs client side handshake. The |hostname| is the hostname of

src/AsyncNameResolverMan.cc

@@ -175,11 +175,11 @@ int AsyncNameResolverMan::getStatus() const
       break;
     }
   }
-  // If we got IPv4 lookup response, we don't wait for IPv6 lookup
-  // response. This is because DNS server may drop AAAA query and we
-  // have to wait for the long time before timeout. We don't do the
-  // inverse, because, based on todays deployment of DNS server,
-  // almost all of them can respond A query just fine.
+  // If we got a IPv4 lookup response, we don't wait for a IPv6 lookup
+  // response. This is because DNS servers may drop AAAA queries and we
+  // have to wait for a long time before timeout. We don't do the
+  // inverse, because, based on today's deployment of DNS servers,
+  // almost all of them can respond to A queries just fine.
   if((success && ipv4Success) || success == numResolver_) {
     return 1;
   } else if(error == numResolver_) {

src/BtCheckIntegrityEntry.cc

@@ -73,7 +73,7 @@ void BtCheckIntegrityEntry::onDownloadFinished
 (std::vector<std::unique_ptr<Command>>& commands, DownloadEngine* e)
 {
   // TODO Currently,when all the checksums
-  // are valid, then aira2 goes to seeding mode. Sometimes it is better
+  // are valid, then aria2 goes to seeding mode. Sometimes it is better
   // to exit rather than doing seeding. So, it would be good to toggle this
   // behavior.
   if(!getRequestGroup()->getOption()->getAsBool(PREF_HASH_CHECK_ONLY) &&

src/CookieStorage.h

@@ -207,20 +207,20 @@ private:
   void updateLru(DomainNode* node, time_t now);
 
   // rootNode_ is a root node of tree structure of reversed domain
-  // labels.  rootNode_ always contans no cookie. It has the child
+  // labels.  rootNode_ always contains no cookie. It has the child
   // nodes of the top level domain label (e.g., net, com and org). And
-  // those top level domain nodes have 2nd doman label (e.g.,
-  // sourcforge, github), and so on. The numeric host name are always
+  // those top level domain nodes have 2nd domain label (e.g.,
+  // sourceforge, github), and so on. The numeric host name are always
   // stored as a child node of rootNode_. So the domain name of a
-  // paricular node is constructed as follows. First traverse the
+  // particular node is constructed as follows. First traverse the
   // target node from root node. The concatenation of the visited
   // node's label in the reverse order, delimited by ".", is the
   std::unique_ptr<DomainNode> rootNode_;
   // This object tracks the node which has cookies or it once had. The
   // order is sorted by the least recent updated node first. This
-  // object does not track the node which has not contan cookie. For
+  // object does not track the node which has not contain cookie. For
   // example, adding cookies in aria2.sourceforge.net, and no node
-  // labeled "sourceforge" is present, only node labelded "aria2" is
+  // labeled "sourceforge" is present, only node labeled "aria2" is
   // tracked and node labeled "sourceforge" and "net" are not.
   std::set<std::pair<time_t, DomainNode*>> lruTracker_;
 };

src/DHTBucketTree.h

@@ -72,7 +72,7 @@ public:
   const std::shared_ptr<DHTBucket>& getBucket() const { return bucket_; }
   // Splits this object's bucket using DHTBucket::split() and create
   // left and right child node to hold buckets. The bucket of current
-  // node is reseted so this node becomes internal node after this
+  // node is reset so this node becomes internal node after this
   // call.
   void split();
 private:

src/DHTConnectionImpl.h

@@ -57,7 +57,7 @@ public:
 
   /**
    * Binds port. All number in sgl are tried. All numbers in sgl must
-   * be in range [1, 65535], inclusive. If successful, the binded port
+   * be in range [1, 65535], inclusive. If successful, the bound port
    * is assigned to port and returns true.  Otherwise return false and
    * port is undefined in this case.  If non-empty string addr is
    * given, the socket is associated to the address.
@@ -66,13 +66,13 @@ public:
 
   /**
    * Binds port. The port number specified by port is used to bind.
-   * If successful, the binded port is assigned to port and returns
+   * If successful, the bound port is assigned to port and returns
    * true.  Otherwise return false and port is undefined in this case.
    * If non-empty string addr is given, the socket is associated to
    * the address.
    *
    * If you want to bind arbitrary port, give 0 as port and if successful,
-   * the binded port is assigned to port.
+   * the bound port is assigned to port.
    */
   bool bind(uint16_t& port, const std::string& addr);
 

src/DHTGetPeersReplyMessage.cc

@@ -102,7 +102,7 @@ std::unique_ptr<Dict> DHTGetPeersReplyMessage::getResponse()
     rDict->put(family_ == AF_INET?NODES:NODES6, String::g(buffer, offset));
   }
   if(!values_.empty()) {
-    // Limit the size of values list.  The maxmum size of UDP datagram
+    // Limit the size of values list.  The maximum size of UDP datagram
     // is limited to 65535 bytes. aria2 uses 20bytes token and 2byte
     // transaction ID. The size of get_peers reply message without
     // values list and nodes is 87bytes:
@@ -115,7 +115,7 @@ std::unique_ptr<Dict> DHTGetPeersReplyMessage::getResponse()
     //
     // Because of Path MTU Discovery, UDP packet size which need not
     // to be fragmented is much smaller. Since Linux uses Path MTU
-    // Dicoverry by default and returning ICMP message might be
+    // Discovery by default and returning ICMP message might be
     // filtered, we should avoid fragmentation.  MTU of pppoe is 1492
     // max according to RFC2516.  We use maximum packet size to be
     // 1024. Since it contains 20 bytes IP header and 8 bytes UDP

src/DefaultBtInteractive.cc

@@ -446,7 +446,7 @@ void DefaultBtInteractive::detectMessageFlooding() {
 void DefaultBtInteractive::checkActiveInteraction()
 {
   time_t inactiveTime = inactiveTimer_.difference(global::wallclock());
-  // To allow aria2 to accept mutially interested peer, disconnect unintersted
+  // To allow aria2 to accept mutially interested peer, disconnect uninterested
   // peer.
   {
     const time_t interval = 30;

src/DownloadCommand.cc

@@ -211,7 +211,7 @@ bool DownloadCommand::executeInternal() {
       // used and Content-Length is known.  We check
       // streamFilter_->finished() only if the requested end offset
       // equals to written position in file local offset; in other
-      // words, data in the requested ranage is all received.  If
+      // words, data in the requested range is all received.  If
       // requested end offset is greater than this segment, then
       // streamFilter_ is not finished in this segment.
       segmentPartComplete = true;

src/ExtensionMessageRegistry.h

@@ -43,7 +43,7 @@ namespace aria2 {
 
 typedef std::vector<int> Extensions;
 
-// This class stores mapping between BitTorrent entension name and its
+// This class stores mapping between BitTorrent extension name and its
 // ID. The BitTorrent Extension Protocol is specified in BEP10.  This
 // class is defined to only stores extensions aria2 supports. See
 // InterestingExtension for supported extensions.

src/FileEntry.h

@@ -143,7 +143,7 @@ public:
     return spentUris_;
   }
 
-  // Exposed for unitest
+  // Exposed for unittest
   std::deque<std::string>& getSpentUris()
   {
     return spentUris_;

src/FtpConnection.cc

@@ -295,7 +295,7 @@ int FtpConnection::getStatus(const std::string& response) const
   }
 }
 
-// Returns the length of the reponse if the whole response has been received.
+// Returns the length of the response if the whole response has been received.
 // The length includes \r\n.
 // If the whole response has not been received, then returns std::string::npos.
 std::string::size_type

src/FtpNegotiationCommand.cc

@@ -798,7 +798,7 @@ bool FtpNegotiationCommand::recvRest(const std::shared_ptr<Segment>& segment) {
   if(status == 0) {
     return false;
   }
-  // If we recieve negative response and requested file position is not 0,
+  // If we receive negative response and requested file position is not 0,
   // then throw exception here.
   if(status != 350) {
     if(segment && segment->getPositionToWrite() != 0) {

src/GZipEncoder.h

@@ -57,7 +57,7 @@ public:
 
   ~GZipEncoder();
 
-  // Initializes deflator.
+  // Initializes deflater.
   void init();
 
   // Feeds NULL-terminated c-string s to deflater.  The deflated
@@ -72,12 +72,12 @@ public:
   // deflated result is kept in this class.
   GZipEncoder& write(const char* s, size_t length);
 
-  // Feeds integer to deflator. Before passed to deflator, i is
+  // Feeds integer to deflater. Before passed to deflater, i is
   // converted to std::string using util::itos().  The deflated result
   // is kept in this class.
   GZipEncoder& operator<<(int64_t i);
 
-  // Feeds binary data pointed by in with size length to deflator and
+  // Feeds binary data pointed by in with size length to deflater and
   // returns compressed output available so far.  Don't use this
   // method with operator<< methods.
   std::string encode(const unsigned char* in, size_t length)

src/HandshakeExtensionMessage.cc

@@ -214,7 +214,7 @@ HandshakeExtensionMessage::create(const unsigned char* data, size_t length)
     }
 
     // Only accept metadata smaller than 1MiB.  Be aware that broken
-    // clinet can send negative size!
+    // client can send negative size!
     if(size > 0 && size <= 1024*1024) {
       msg->metadataSize_ = size;
     }

src/HttpHeader.cc

@@ -109,7 +109,7 @@ Range HttpHeader::getRange() const
     }
   }
   // we expect that rangeStr looks like 'bytes 100-199/100'
-  // but some server returns '100-199/100', omitting bytes-unit sepcifier
+  // but some server returns '100-199/100', omitting bytes-unit specifier
   // 'bytes'.
   auto byteRangeSpec = std::find(rangeStr.begin(), rangeStr.end(), ' ');
   if(byteRangeSpec == rangeStr.end()) {

src/HttpHeader.h

@@ -149,7 +149,7 @@ public:
   // Clears table_. responseStatus_ and version_ are unchanged.
   void clearField();
 
-  // Returns true if heder field |name| contains |value|. This method
+  // Returns true if header field |name| contains |value|. This method
   // assumes the values of the header field is delimited by ','.
   bool fieldContains(int hdKey, const char* value);
 

src/HttpResponseCommand.cc

@@ -363,7 +363,7 @@ bool HttpResponseCommand::handleDefaultEncoding
   // AbstractCommand::execute()
   auto segment = getSegmentMan()->getSegmentWithIndex(getCuid(), 0);
   // pipelining requires implicit range specified. But the request for
-  // this response most likely dones't contains range header. This means
+  // this response most likely doesn't contains range header. This means
   // we can't continue to use this socket because server sends all entity
   // body instead of a segment.
   // Therefore, we shutdown the socket here if pipelining is enabled.

src/IndexedList.h

@@ -536,7 +536,7 @@ public:
   // the element is moved to the position |offset|. If |how| is
   // OFFSET_MODE_END, the element is moved to the position |offset|
   // relative to the end of the list.  This function returns the
-  // position the elment is moved to if it succeeds, or -1 if no
+  // position the element is moved to if it succeeds, or -1 if no
   // element with |key| is found or |how| is invalid.  Complexity:
   // O(N)
   ssize_t move(KeyType key, ssize_t offset, OffsetMode how)

src/InitiateConnectionCommand.cc

@@ -133,7 +133,7 @@ InitiateConnectionCommand::createBackupIPv4ConnectCommand
 (const std::string& hostname, const std::string& ipaddr, uint16_t port,
  Command* mainCommand)
 {
-  // Prepare IPv4 backup connection attemp in "Happy Eyeballs"
+  // Prepare IPv4 backup connection attempt in "Happy Eyeballs"
   // fashion.
   std::shared_ptr<BackupConnectInfo> info;
   char buf[sizeof(in6_addr)];

src/LibgnutlsTLSSession.cc

@@ -87,7 +87,7 @@ GnuTLSSession::~GnuTLSSession()
 // expect that upcoming (at the time of this writing) 3.1.19 and 3.2.9
 // will fix this bug.  See
 // http://lists.gnutls.org/pipermail/gnutls-devel/2014-January/006679.html
-// for dtails.
+// for details.
 #if (GNUTLS_VERSION_NUMBER >= 0x030103 && GNUTLS_VERSION_NUMBER <= 0x030112) \
   || (GNUTLS_VERSION_NUMBER >= 0x030200 && GNUTLS_VERSION_NUMBER <= 0x030208)
 # define A2_DISABLE_OCSP 1

src/LogFactory.cc

@@ -54,7 +54,7 @@ void LogFactory::openLogger(const std::shared_ptr<Logger>& logger)
 {
   if(filename_ != DEV_NULL) {
     // don't open file DEV_NULL for performance sake.
-    // This avoids costly unecessary message formatting and write.
+    // This avoids costly unnecessary message formatting and write.
     logger->openFile(filename_);
   }
   logger->setLogLevel(logLevel_);

src/Metalink2RequestGroup.cc

@@ -228,7 +228,7 @@ Metalink2RequestGroup::createRequestGroup
         torrentRg->clearPreDownloadHandler();
         torrentRg->clearPostDownloadHandler();
         // remove "metalink" from Accept Type list to avoid loop in
-        // tranparent metalink
+        // transparent metalink
         torrentRg->getDownloadContext()->setAcceptMetalink(false);
         // make it in-memory download
         torrentRg->addPreDownloadHandler
@@ -327,10 +327,10 @@ Metalink2RequestGroup::createRequestGroup
 
     removeOneshotOption(option);
     // remove "metalink" from Accept Type list to avoid loop in
-    // tranparent metalink
+    // transparent metalink
     dctx->setAcceptMetalink(false);
 #ifdef ENABLE_BITTORRENT
-    // Inject depenency between rg and torrentRg here if
+    // Inject dependency between rg and torrentRg here if
     // torrentRg is true
     if(torrentRg) {
       auto dep = std::make_shared<BtDependency>(rg.get(), torrentRg);

src/MetalinkParserStateV3Impl.cc

@@ -355,9 +355,9 @@ void ResourcesMetalinkParserState::beginElement
       }
       else if(util::parseIntNoThrow(preference, std::string((*itr).value, (*itr).valueLength)) &&
               preference >= 0) {
-        // In Metalink3Spec, highest prefernce value is 100.  We
+        // In Metalink3Spec, highest preference value is 100.  We
         // use Metalink4Spec priority unit system in which 1 is
-        // higest.
+        // highest.
         preference = 101-preference;
       }
       else {

src/MultiDiskAdaptor.cc

@@ -162,13 +162,13 @@ void MultiDiskAdaptor::resetDiskWriterEntries()
         }
       } else if(fileEntry->getOffset() < lastOffset) {
         // The files which shares last piece are not needed to be
-        // allocated. They just requre DiskWriter
+        // allocated. They just require DiskWriter
         A2_LOG_DEBUG(fmt("%s needs DiskWriter",
                          fileEntry->getPath().c_str()));
         dwent->needsDiskWriter(true);
       }
     }
-    // Check shared piece backword
+    // Check shared piece backward
     lastOffset = std::numeric_limits<int64_t>::max();
     for(auto i = diskWriterEntries_.rbegin(), eoi = diskWriterEntries_.rend();
         i != eoi; ++i) {

src/OptionHandlerImpl.cc

@@ -352,7 +352,7 @@ IndexOutOptionHandler::~IndexOutOptionHandler() {}
 void IndexOutOptionHandler::parseArg(Option& option, const std::string& optarg)
   const
 {
-  // See optarg is in the fomrat of "INDEX=PATH"
+  // See optarg is in the format of "INDEX=PATH"
   util::parseIndexPath(optarg);
   std::string value = option.get(pref_);
   value += optarg;

src/OptionHandlerImpl.h

@@ -270,7 +270,7 @@ private:
 public:
   // depOptHandler is deprecated option and repOptHandler is replacing
   // new option. If there is no replacing option, specify nullptr.  If
-  // there is no replacing option, but the option still alives, give
+  // there is no replacing option, but the option still lives, give
   // true to stillWork. Set additional message to additionalMessage.
   DeprecatedOptionHandler
   (OptionHandler* depOptHandler,

src/OptionParser.h

@@ -98,7 +98,7 @@ public:
   const OptionHandler* findByShortName(char shortName) const;
 
   static const std::shared_ptr<OptionParser>& getInstance();
-  // Deletes statically allocated instace. Call this at the end of the
+  // Deletes statically allocated instance. Call this at the end of the
   // program.
   static void deleteInstance();
 };

src/PeerListenCommand.h

@@ -59,12 +59,12 @@ public:
   virtual bool execute() CXX11_OVERRIDE;
 
   /**
-   * Binds port. If successful, the binded port number is assinged to port and
+   * Binds port. If successful, the bound port number is assinged to port and
    * returns true, otherwise port is undefined and returns false.
    */
   bool bindPort(uint16_t& port, SegList<int>& seq);
 
-  // Returns binded port
+  // Returns bound port
   uint16_t getPort() const;
 };
 

src/Platform.cc

@@ -185,7 +185,7 @@ bool Platform::tearDown()
   WSACleanup();
 #endif // HAVE_WINSOCK2_H
   // Deletes statically allocated resources. This is done to
-  // distinguish memory leak from them. This is handly to use
+  // distinguish memory leak from them. This is handy to use
   // valgrind.
   OptionParser::deleteInstance();
   option::deletePrefResource();

src/RequestGroupMan.cc

@@ -405,7 +405,7 @@ public:
                                    PREF_ON_DOWNLOAD_PAUSE);
         notifyDownloadEvent(EVENT_ON_DOWNLOAD_PAUSE, group);
         // TODO Should we have to prepend spend uris to remaining uris
-        // in case PREF_REUSE_URI is disabed?
+        // in case PREF_REUSE_URI is disabled?
       } else {
         std::shared_ptr<DownloadResult> dr = group->createDownloadResult();
         e_->getRequestGroupMan()->addDownloadResult(dr);

src/SegList.h

@@ -105,7 +105,7 @@ public:
   }
 
   // Returns next value. Advance current position to the next.  If
-  // this fuction is called when hasNext() returns false, returns 0.
+  // this function is called when hasNext() returns false, returns 0.
   T next()
   {
     T res;
@@ -125,7 +125,7 @@ public:
   }
 
   // Returns next value. Current position is not advanced.  If
-  // this fuction is called when hasNext() returns false, returns 0.
+  // this function is called when hasNext() returns false, returns 0.
   T peek() const
   {
     T res;

src/SessionSerializer.cc

@@ -177,7 +177,7 @@ namespace {
   }
 } // namespace
 
-// The downloads whose followedBy() is empty is persisited with its
+// The downloads whose followedBy() is empty is persisted with its
 // GID without no problem. For other cases, there are several patterns.
 //
 // 1. magnet URI
@@ -202,7 +202,7 @@ bool writeDownloadResult
   }
   if(!mi) {
     // With --force-save option, same gid may be saved twice. (e.g.,
-    // Downloading .meta4 followed by its conent download. First
+    // Downloading .meta4 followed by its content download. First
     // .meta4 download is saved and second content download is also
     // saved with the same gid.)
     if(metainfoCache.count(dr->gid->getNumericId()) != 0) {

src/SocketBuffer.h

@@ -117,7 +117,7 @@ public:
   SocketBuffer(const SocketBuffer&) = delete;
   SocketBuffer& operator=(const SocketBuffer&) = delete;
 
-  // Feeds data pointered by bytes with length len into queue.  This
+  // Feeds data pointed by bytes with length len into queue.  This
   // object gets ownership of bytes, so caller must not delete or
   // later bytes after this call. This function doesn't send data.  If
   // progressUpdate is not null, its update() function will be called

src/SocketCore.cc

@@ -866,7 +866,7 @@ bool SocketCore::tlsHandshake(TLSContext* tlsctx, const std::string& hostname)
   }
 
   if(secure_ == A2_TLS_HANDSHAKING) {
-    // Starting handshake after intial setup or still handshaking.
+    // Starting handshake after initial setup or still handshaking.
     TLSVersion ver = TLS_PROTO_NONE;
     int rv = 0;
     std::string handshakeError;

src/SocketCore.h

@@ -352,7 +352,7 @@ int callGetaddrinfo
 (struct addrinfo** resPtr, const char* host, const char* service, int family,
  int sockType, int flags, int protocol);
 
-// Collects IP addresses of given inteface iface and stores in
+// Collects IP addresses of given interface iface and stores in
 // ifAddres. iface may be specified as a hostname, IP address or
 // interface name like eth0. You can limit the family of IP addresses
 // to collect using family argument. aiFlags is passed to

src/SpeedCalc.cc

@@ -102,7 +102,7 @@ void SpeedCalc::update(size_t bytes)
 int SpeedCalc::calculateAvgSpeed() const
 {
   int64_t milliElapsed = start_.differenceInMillis(global::wallclock());
-  // if milliElapsed is too small, the average speed is rubish, better
+  // if milliElapsed is too small, the average speed is rubbish, better
   // return 0
   if(milliElapsed > 4) {
     int speed = accumulatedLength_*1000/milliElapsed;

src/StreamFilter.h

@@ -71,7 +71,7 @@ public:
   virtual const std::string& getName() const = 0;
 
   // Returns the number of input bytes processed in the last
-  // tranfrom() invocation.
+  // transform() invocation.
   virtual size_t getBytesProcessed() const = 0;
 
   virtual bool installDelegate(std::unique_ptr<StreamFilter> filter);

src/TLSSession.h

@@ -62,7 +62,7 @@ public:
   virtual ~TLSSession() {}
 
   // Initializes SSL/TLS session. The |sockfd| is the underlying
-  // tranport socket. This function returns TLS_ERR_OK if it
+  // transport socket. This function returns TLS_ERR_OK if it
   // succeeds, or TLS_ERR_ERROR.
   virtual int init(sock_t sockfd) = 0;
 
@@ -85,12 +85,12 @@ public:
 
   // Sends |data| with length |len|. This function returns the number
   // of bytes sent if it succeeds, or TLS_ERR_WOULDBLOCK if the
-  // underlying tranport blocks, or TLS_ERR_ERROR.
+  // underlying transport blocks, or TLS_ERR_ERROR.
   virtual ssize_t writeData(const void* data, size_t len) = 0;
 
   // Receives data into |data| with length |len|. This function returns
   // the number of bytes received if it succeeds, or TLS_ERR_WOULDBLOCK
-  // if the underlying tranport blocks, or TLS_ERR_ERROR.
+  // if the underlying transport blocks, or TLS_ERR_ERROR.
   virtual ssize_t readData(void* data, size_t len) = 0;
 
   // Performs client side handshake. The |hostname| is the hostname of

src/UDPTrackerClient.cc

@@ -154,7 +154,7 @@ int UDPTrackerClient::receiveReply
                     transactionId, connectionId));
     UDPTrackerConnection c(UDPT_CST_CONNECTED, connectionId, now);
     connectionIdCache_[std::make_pair(remoteAddr, remotePort)] = c;
-    // Now we have connecion ID, push requests which are waiting for
+    // Now we have connection ID, push requests which are waiting for
     // it.
     std::vector<std::shared_ptr<UDPTrackerRequest> > reqs;
     connectRequests_.erase(std::remove_if
@@ -512,7 +512,7 @@ void UDPTrackerClient::failConnect(const std::string& remoteAddr,
                                    uint16_t remotePort, int error)
 {
   connectionIdCache_.erase(std::make_pair(remoteAddr, remotePort));
-  // Fail all requests which are waiting for connecion ID of the host.
+  // Fail all requests which are waiting for connection ID of the host.
   connectRequests_.erase(std::remove_if(connectRequests_.begin(),
                                         connectRequests_.end(),
                                         FailConnectDelete

src/ValueBase.h

@@ -101,7 +101,7 @@ public:
 
   ValueType popValue() const;
 
-  // Returns std::string.data() casted to unsigned char*.
+  // Returns std::string.data() cast to unsigned char*.
   // Use s().size() to get length.
   const unsigned char* uc() const;
 
@@ -181,7 +181,7 @@ public:
   // Appends given v to list.
   void append(std::unique_ptr<ValueBase> v);
 
-  // Appeding string is so common that we provide shortcut function.
+  // Appending string is so common that we provide shortcut function.
   void append(String::ValueType string);
 
   // Alias for append()

src/WebSocketSession.h

@@ -79,7 +79,7 @@ public:
   bool closeReceived();
   // Returns true if the close frame is sent.
   bool closeSent();
-  // Parses parital request body. This function returns the number of
+  // Parses partial request body. This function returns the number of
   // bytes processed if it succeeds, or negative error code.
   ssize_t parseUpdate(const uint8_t* data, size_t len);
   // Parses final part of request body and returns result.  The

src/WinTLSContext.cc

@@ -152,13 +152,13 @@ void WinTLSContext::setVerifyPeer(bool verify)
 
   if (credentials_.dwMinimumCipherStrength > WEAK_CIPHER_BITS) {
     // Enable strong crypto if we already set a minimum cipher streams.
-    // This might actually require evem stronger algorithms, which is a good
+    // This might actually require even stronger algorithms, which is a good
     // thing.
     credentials_.dwFlags |= SCH_USE_STRONG_CRYPTO;
   }
 
   if (side_ != TLS_CLIENT || !verify) {
-    // No verfication for servers and if user explicitly requested it
+    // No verification for servers and if user explicitly requested it
     credentials_.dwFlags |= SCH_CRED_MANUAL_CRED_VALIDATION |
                             SCH_CRED_IGNORE_NO_REVOCATION_CHECK |
                             SCH_CRED_IGNORE_REVOCATION_OFFLINE |

src/WinTLSSession.cc

@@ -395,7 +395,7 @@ ssize_t WinTLSSession::writeData(const void* data, size_t len)
     }
     dl += buffers[1].cbBuffer;
     if (dl < streamSizes_->cbHeader + writeBuffered_) {
-      // Move tailer.
+      // Move trailer.
       memmove(buf.get() + dl, buffers[2].pvBuffer, buffers[2].cbBuffer);
     }
     dl += buffers[2].cbBuffer;

src/WinTLSSession.h

@@ -138,7 +138,7 @@ public:
   virtual ~WinTLSSession();
 
   // Initializes SSL/TLS session. The |sockfd| is the underlying
-  // tranport socket. This function returns TLS_ERR_OK if it
+  // transport socket. This function returns TLS_ERR_OK if it
   // succeeds, or TLS_ERR_ERROR.
   virtual int init(sock_t sockfd) CXX11_OVERRIDE;
 
@@ -161,12 +161,12 @@ public:
 
   // Sends |data| with length |len|. This function returns the number
   // of bytes sent if it succeeds, or TLS_ERR_WOULDBLOCK if the
-  // underlying tranport blocks, or TLS_ERR_ERROR.
+  // underlying transport blocks, or TLS_ERR_ERROR.
   virtual ssize_t writeData(const void* data, size_t len) CXX11_OVERRIDE;
 
   // Receives data into |data| with length |len|. This function returns
   // the number of bytes received if it succeeds, or TLS_ERR_WOULDBLOCK
-  // if the underlying tranport blocks, or TLS_ERR_ERROR.
+  // if the underlying transport blocks, or TLS_ERR_ERROR.
   virtual ssize_t readData(void* data, size_t len) CXX11_OVERRIDE;
 
   // Performs client side handshake. The |hostname| is the hostname of
@@ -197,7 +197,7 @@ private:
   // Buffer for already encrypted writes
   wintls::Buffer writeBuf_;
   // While the writeBuf_ holds encrypted messages, writeBuffered_ has the
-  // corresponding size of unencrpted data used to procude the messages.
+  // corresponding size of unencrypted data used to produce the messages.
   size_t writeBuffered_;
   // Buffer for still encrypted reads
   wintls::Buffer readBuf_;

src/a2io.h

@@ -83,7 +83,7 @@
 # define                S_IRGRP 0000040 /* read permission, group */
 #endif /* S_IRGRP       */
 #ifndef S_IWGRP
-# define                S_IWGRP 0000020 /* write permission, grougroup */
+# define                S_IWGRP 0000020 /* write permission, group */
 #endif /* S_IWGRP       */
 #ifndef S_IXGRP
 # define                S_IXGRP 0000010/* execute/search permission, group */

src/bittorrent_helper.cc

@@ -477,7 +477,7 @@ void processRootDictionary
     torrent->privateTorrent = true;
   }
   // retrieve uri-list.
-  // This implemantation obeys HTTP-Seeding specification:
+  // This implementation obeys HTTP-Seeding specification:
   // see http://www.getright.com/seedtorrent.html
   std::vector<std::string> urlList;
   extractUrlList(torrent.get(), urlList, rootDict->get(C_URL_LIST));

src/bittorrent_helper.h

@@ -120,14 +120,14 @@ void loadFromMemory(const ValueBase* torrent,
 std::unique_ptr<TorrentAttribute> parseMagnet(const std::string& magnet);
 
 // Parses BitTorrent Magnet URI and set them in ctx as a
-// bittorrent::BITTORRENT attibute. If parsing operation failed, an
+// bittorrent::BITTORRENT attribute. If parsing operation failed, an
 // RecoverableException will be thrown.
 void loadMagnet
 (const std::string& magnet, const std::shared_ptr<DownloadContext>& ctx);
 
 // Generates Peer ID. BitTorrent specification says Peer ID is 20-byte
 // length.  This function uses peerIdPrefix as a Peer ID and it is
-// less than 20bytes, random bytes are generated and appened to it. If
+// less than 20bytes, random bytes are generated and appended to it. If
 // peerIdPrefix is larger than 20bytes, first 20bytes are used.
 std::string generatePeerId(const std::string& peerIdPrefix);
 
@@ -149,7 +149,7 @@ std::vector<size_t> computeFastSet
 (const std::string& ipaddr,
  size_t numPieces, const unsigned char* infoHash, size_t fastSetSize);
 
-// Make sure that don't recieve return value into std::shared_ptr.
+// Make sure that don't receive return value into std::shared_ptr.
 TorrentAttribute* getTorrentAttrs(DownloadContext* dctx);
 TorrentAttribute* getTorrentAttrs
 (const std::shared_ptr<DownloadContext>& dctx);

src/crypto_hash.cc

@@ -75,7 +75,7 @@ static forceinline T par(T b, T c, T d)
 using namespace crypto;
 using namespace crypto::hash;
 
-// Our base implementation, doing most of the work, short of |tranform|,
+// Our base implementation, doing most of the work, short of |transform|,
 // |digest| and initialization.
 template <typename word_, uint_fast8_t bsize, uint_fast8_t ssize>
 class AlgorithmImpl : public Algorithm
@@ -232,7 +232,7 @@ protected:
   a1 += a2;
 
     // Yeah, unrolled loops.
-    // This stuff is generated, but accidentially deleted the generator script.
+    // This stuff is generated, but accidentally deleted the generator script.
 
     r(f1, a, b, c, d, w00, 0xd76aa478, 7);
     r(f1, d, a, b, c, w01, 0xe8c7b756, 12);

src/download_helper.h

@@ -121,7 +121,7 @@ void createRequestGroupForUriList
  const std::shared_ptr<Option>& option);
 
 // Create RequestGroup object using provided uris.  If ignoreLocalPath
-// is true, a path to torrent file abd metalink file are ignored.  If
+// is true, a path to torrent file and metalink file are ignored.  If
 // throwOnError is true, exception will be thrown when Metalink
 // Document or .torrent file cannot be parsed or unrecognized URI is
 // given. If throwOnError is false, these errors are just logged as

src/message_digest_helper.h

@@ -48,7 +48,7 @@ class MessageDigest;
 namespace message_digest {
 
 /**
- * ctx must be initialized or reseted before calling this function.
+ * ctx must be initialized or reset before calling this function.
  * Returns raw digest string, not hex digest
  */
 std::string digest

src/paramed_string.h

@@ -195,7 +195,7 @@ InputIterator expandLoop
 //
 // When loop through START to END, we include both START and END.
 //
-// STEP is dicimal number and it is used as loop step.  STEP can be
+// STEP is decimal number and it is used as loop step.  STEP can be
 // omitted. If omitted, preceding ':' also must be omitted.
 //
 // START, END and STEP must be less than or equal to 65535 in decimal.

src/prefs.cc

@@ -371,7 +371,7 @@ PrefPtr PREF_DSCP = makePref("dscp");
 PrefPtr PREF_PAUSE_METADATA = makePref("pause-metadata");
 // values: 1*digit
 PrefPtr PREF_RLIMIT_NOFILE = makePref("rlimit-nofile");
-// vlaues: SSLv3 | TLSv1 | TLSv1.1 | TLSv1.2
+// values: SSLv3 | TLSv1 | TLSv1.1 | TLSv1.2
 PrefPtr PREF_MIN_TLS_VERSION = makePref("min-tls-version");
 
 /**
@@ -429,7 +429,7 @@ PrefPtr PREF_HTTP_PROXY = makePref("http-proxy");
 PrefPtr PREF_HTTPS_PROXY = makePref("https-proxy");
 PrefPtr PREF_FTP_PROXY = makePref("ftp-proxy");
 PrefPtr PREF_ALL_PROXY = makePref("all-proxy");
-// values: comma separeted hostname or domain
+// values: comma separated hostname or domain
 PrefPtr PREF_NO_PROXY = makePref("no-proxy");
 // values: get | tunnel
 PrefPtr PREF_PROXY_METHOD = makePref("proxy-method");

src/prefs.h

@@ -308,7 +308,7 @@ extern PrefPtr PREF_DSCP;
 extern PrefPtr PREF_PAUSE_METADATA;
 // values: 1*digit
 extern PrefPtr PREF_RLIMIT_NOFILE;
-// vlaues: SSLv3 | TLSv1 | TLSv1.1 | TLSv1.2
+// values: SSLv3 | TLSv1 | TLSv1.1 | TLSv1.2
 extern PrefPtr PREF_MIN_TLS_VERSION;
 
 /**
@@ -366,7 +366,7 @@ extern PrefPtr PREF_HTTP_PROXY;
 extern PrefPtr PREF_HTTPS_PROXY;
 extern PrefPtr PREF_FTP_PROXY;
 extern PrefPtr PREF_ALL_PROXY;
-// values: comma separeted hostname or domain
+// values: comma separated hostname or domain
 extern PrefPtr PREF_NO_PROXY;
 // values: get | tunnel
 extern PrefPtr PREF_PROXY_METHOD;

src/wallclock.h

@@ -38,7 +38,7 @@ namespace aria2 {
 
 namespace global {
 
-// Global clock, this clock is reseted before executeCommand() call to
+// Global clock, this clock is reset before executeCommand() call to
 // reduce the call gettimeofday() system call.
 Timer& wallclock();