/*========================================================================= Program: gdcm Module: $RCSfile: gdcmUtil.cxx,v $ Language: C++ Date: $Date: 2005/06/08 12:24:53 $ Version: $Revision: 1.154 $ Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de l'Image). All rights reserved. See Doc/License.txt or http://www.creatis.insa-lyon.fr/Public/Gdcm/License.html for details. This software is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the above copyright notices for more information. =========================================================================*/ #include "gdcmUtil.h" #include "gdcmDebug.h" #include // For GetCurrentDate, GetCurrentTime #include #include #include #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__) #include #else #include #endif #include //only included in implementation file #include //only included in implementation file #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__) #include // for gethostname and gethostbyname and GetTickCount... #ifndef __BORLANDC__ #undef GetCurrentTime #endif #else #include // for gethostname #include // for gethostbyname #endif // For GetMACAddress #ifdef _WIN32 #include #include #else #include #include #include #include #endif #ifdef CMAKE_HAVE_SYS_IOCTL_H #include // For SIOCGIFCONF on Linux #endif #ifdef CMAKE_HAVE_SYS_SOCKET_H #include #endif #ifdef CMAKE_HAVE_SYS_SOCKIO_H #include // For SIOCGIFCONF on SunOS #endif #ifdef CMAKE_HAVE_NET_IF_H #include #endif #ifdef CMAKE_HAVE_NETINET_IN_H #include //For IPPROTO_IP #endif #ifdef CMAKE_HAVE_NET_IF_DL_H #include #endif #if defined(CMAKE_HAVE_NET_IF_ARP_H) && defined(__sun) // This is absolutely necessary on SunOS #include #endif // For GetCurrentThreadID() #ifdef __linux__ #include #include #endif #ifdef __sun #include #endif namespace gdcm { //------------------------------------------------------------------------- const std::string Util::GDCM_UID = "1.2.826.0.1.3680043.2.1143"; std::string Util::RootUID = GDCM_UID; const uint16_t Util::FMIV = 0x0001; uint8_t *Util::FileMetaInformationVersion = (uint8_t *)&FMIV; std::string Util::GDCM_MAC_ADRESS = GetMACAddress(); //------------------------------------------------------------------------- // Public /** * \brief Provide a better 'c++' approach for sprintf * For example c code is: * char result[200]; // hope 200 is enough * sprintf(result, "%04x|%04x", group , elem); * * c++ code is * std::ostringstream buf; * buf << std::right << std::setw(4) << std::setfill('0') << std::hex * << group << "|" << std::right << std::setw(4) << std::setfill('0') * << std::hex << elem; * buf.str(); * * gdcm style code is * string result; * result = gdcm::Util::Format("%04x|%04x", group , elem); */ std::string Util::Format(const char *format, ...) { char buffer[2048]; va_list args; va_start(args, format); vsprintf(buffer, format, args); //might be a security flaw va_end(args); // Each invocation of va_start should be matched // by a corresponding invocation of va_end // args is then 'undefined' return buffer; } /** * \brief Because not available in C++ (?) * @param str string to check * @param tokens std::vector to receive the tokenized substrings * @param delimiters string containing the character delimitors */ void Util::Tokenize (const std::string &str, std::vector &tokens, const std::string &delimiters) { std::string::size_type lastPos = str.find_first_not_of(delimiters,0); std::string::size_type pos = str.find_first_of (delimiters,lastPos); while (std::string::npos != pos || std::string::npos != lastPos) { tokens.push_back(str.substr(lastPos, pos - lastPos)); lastPos = str.find_first_not_of(delimiters, pos); pos = str.find_first_of (delimiters, lastPos); } } /** * \brief Because not available in C++ (?) * Counts the number of occurences of a substring within a string * @param str string to check * @param subStr substring to count */ int Util::CountSubstring (const std::string &str, const std::string &subStr) { int count = 0; // counts how many times it appears std::string::size_type x = 0; // The index position in the string do { x = str.find(subStr,x); // Find the substring if (x != std::string::npos) // If present { count++; // increase the count x += subStr.length(); // Skip this word } } while (x != std::string::npos);// Carry on until not present return count; } /** * \brief Weed out a string from the non-printable characters (in order * to avoid corrupting the terminal of invocation when printing) * @param s string to remove non printable characters from */ std::string Util::CreateCleanString(std::string const &s) { std::string str = s; for(unsigned int i=0; i 0) { if(!isprint((unsigned char)s[str.size()-1])) { if(s[str.size()-1] == 0) { str[str.size()-1] = ' '; } } } return str; } /** * \brief Add a SEPARATOR to the end of the name is necessary * @param pathname file/directory name to normalize */ std::string Util::NormalizePath(std::string const &pathname) { const char SEPARATOR_X = '/'; const char SEPARATOR_WIN = '\\'; const std::string SEPARATOR = "/"; std::string name = pathname; int size = name.size(); if( name[size-1] != SEPARATOR_X && name[size-1] != SEPARATOR_WIN ) { name += SEPARATOR; } return name; } /** * \brief Get the (directory) path from a full path file name * @param fullName file/directory name to extract Path from */ std::string Util::GetPath(std::string const &fullName) { std::string res = fullName; int pos1 = res.rfind("/"); int pos2 = res.rfind("\\"); if( pos1 > pos2) { res.resize(pos1); } else { res.resize(pos2); } return res; } /** * \brief Get the (last) name of a full path file name * @param fullName file/directory name to extract end name from */ std::string Util::GetName(std::string const &fullName) { std::string filename = fullName; std::string::size_type slash_pos = filename.rfind("/"); std::string::size_type backslash_pos = filename.rfind("\\"); slash_pos = slash_pos > backslash_pos ? slash_pos : backslash_pos; if(slash_pos != std::string::npos) { return filename.substr(slash_pos + 1); } else { return filename; } } /** * \brief Get the current date of the system in a dicom string */ std::string Util::GetCurrentDate() { char tmp[512]; time_t tloc; time (&tloc); strftime(tmp,512,"%Y%m%d", localtime(&tloc) ); return tmp; } /** * \brief Get the current time of the system in a dicom string */ std::string Util::GetCurrentTime() { char tmp[512]; time_t tloc; time (&tloc); strftime(tmp,512,"%H%M%S", localtime(&tloc) ); return tmp; } /** * \brief Get both the date and time at the same time to avoid problem * around midnight where two call could be before and after midnight */ std::string Util::GetCurrentDateTime() { char tmp[40]; long milliseconds; time_t timep; // We need implementation specific functions to obtain millisecond precision #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__) struct timeb tb; ::ftime(&tb); timep = tb.time; milliseconds = tb.millitm; #else struct timeval tv; gettimeofday (&tv, NULL); timep = tv.tv_sec; // Compute milliseconds from microseconds. milliseconds = tv.tv_usec / 1000; #endif // Obtain the time of day, and convert it to a tm struct. struct tm *ptm = localtime (&timep); // Format the date and time, down to a single second. strftime (tmp, sizeof (tmp), "%Y%m%d%H%M%S", ptm); // Add milliseconds // Don't use Util::Format to accelerate execution of code char tmpAll[80]; sprintf(tmpAll,"%s%03ld",tmp,milliseconds); return tmpAll; } unsigned int Util::GetCurrentThreadID() { // FIXME the implementation is far from complete #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__) return (unsigned int)GetCurrentThreadId(); #else #ifdef __linux__ return 0; // Doesn't work on fedora, but is in the man page... //return (unsigned int)gettid(); #else #ifdef __sun return (unsigned int)thr_self(); #else //default implementation return 0; #endif // __sun #endif // __linux__ #endif // Win32 } unsigned int Util::GetCurrentProcessID() { #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__) // NOTE: There is also a _getpid()... return (unsigned int)GetCurrentProcessId(); #else // get process identification, POSIX return (unsigned int)getpid(); #endif } /** * \brief tells us if the processor we are working with is BigEndian or not */ bool Util::IsCurrentProcessorBigEndian() { #if defined(GDCM_WORDS_BIGENDIAN) return true; #else return false; #endif } /** * \brief Create a /DICOM/ string: * It should a of even length (no odd length ever) * It can contain as many (if you are reading this from your * editor the following character is is backslash followed by zero * that needed to be escaped with an extra backslash for doxygen) \\0 * as you want. */ std::string Util::DicomString(const char *s, size_t l) { std::string r(s, s+l); gdcmAssertMacro( !(r.size() % 2) ); // == basically 'l' is even return r; } /** * \brief Create a /DICOM/ string: * It should a of even length (no odd length ever) * It can contain as many (if you are reading this from your * editor the following character is backslash followed by zero * that needed to be escaped with an extra backslash for doxygen) \\0 * as you want. * This function is similar to DicomString(const char*), * except it doesn't take a length. * It only pad with a null character if length is odd */ std::string Util::DicomString(const char *s) { size_t l = strlen(s); if( l%2 ) { l++; } std::string r(s, s+l); gdcmAssertMacro( !(r.size() % 2) ); return r; } /** * \brief Safely compare two Dicom String: * - Both string should be of even length * - We allow padding of even length string by either a null * character of a space */ bool Util::DicomStringEqual(const std::string &s1, const char *s2) { // s2 is the string from the DICOM reference: 'MONOCHROME1' std::string s1_even = s1; //Never change input parameter std::string s2_even = DicomString( s2 ); if( s1_even[s1_even.size()-1] == ' ') { s1_even[s1_even.size()-1] = '\0'; //replace space character by null } return s1_even == s2_even; } #ifdef _WIN32 typedef BOOL(WINAPI * pSnmpExtensionInit) ( IN DWORD dwTimeZeroReference, OUT HANDLE * hPollForTrapEvent, OUT AsnObjectIdentifier * supportedView); typedef BOOL(WINAPI * pSnmpExtensionTrap) ( OUT AsnObjectIdentifier * enterprise, OUT AsnInteger * genericTrap, OUT AsnInteger * specificTrap, OUT AsnTimeticks * timeStamp, OUT RFC1157VarBindList * variableBindings); typedef BOOL(WINAPI * pSnmpExtensionQuery) ( IN BYTE requestType, IN OUT RFC1157VarBindList * variableBindings, OUT AsnInteger * errorStatus, OUT AsnInteger * errorIndex); typedef BOOL(WINAPI * pSnmpExtensionInitEx) ( OUT AsnObjectIdentifier * supportedView); #endif //_WIN32 /// \brief gets current M.A.C adress (for internal use only) int GetMacAddrSys ( unsigned char *addr ); int GetMacAddrSys ( unsigned char *addr ) { #ifdef _WIN32 WSADATA WinsockData; if ( (WSAStartup(MAKEWORD(2, 0), &WinsockData)) != 0) { std::cerr << "This program requires Winsock 2.x!" << std::endl; return -1; } HANDLE PollForTrapEvent; AsnObjectIdentifier SupportedView; UINT OID_ifEntryType[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 3 }; UINT OID_ifEntryNum[] = { 1, 3, 6, 1, 2, 1, 2, 1 }; UINT OID_ipMACEntAddr[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 6 }; AsnObjectIdentifier MIB_ifMACEntAddr = { sizeof(OID_ipMACEntAddr) / sizeof(UINT), OID_ipMACEntAddr }; AsnObjectIdentifier MIB_ifEntryType = { sizeof(OID_ifEntryType) / sizeof(UINT), OID_ifEntryType }; AsnObjectIdentifier MIB_ifEntryNum = { sizeof(OID_ifEntryNum) / sizeof(UINT), OID_ifEntryNum }; RFC1157VarBindList varBindList; RFC1157VarBind varBind[2]; AsnInteger errorStatus; AsnInteger errorIndex; AsnObjectIdentifier MIB_NULL = { 0, 0 }; int ret; int dtmp; int j = 0; // Load the SNMP dll and get the addresses of the functions necessary HINSTANCE m_hInst = LoadLibrary("inetmib1.dll"); if (m_hInst < (HINSTANCE) HINSTANCE_ERROR) { return -1; } pSnmpExtensionInit m_Init = (pSnmpExtensionInit) GetProcAddress(m_hInst, "SnmpExtensionInit"); pSnmpExtensionQuery m_Query = (pSnmpExtensionQuery) GetProcAddress(m_hInst, "SnmpExtensionQuery"); m_Init(GetTickCount(), &PollForTrapEvent, &SupportedView); /* Initialize the variable list to be retrieved by m_Query */ varBindList.list = varBind; varBind[0].name = MIB_NULL; varBind[1].name = MIB_NULL; // Copy in the OID to find the number of entries in the // Inteface table varBindList.len = 1; // Only retrieving one item SNMP_oidcpy(&varBind[0].name, &MIB_ifEntryNum); m_Query(ASN_RFC1157_GETNEXTREQUEST, &varBindList, &errorStatus, &errorIndex); // printf("# of adapters in this system : %i\n", // varBind[0].value.asnValue.number); varBindList.len = 2; // Copy in the OID of ifType, the type of interface SNMP_oidcpy(&varBind[0].name, &MIB_ifEntryType); // Copy in the OID of ifPhysAddress, the address SNMP_oidcpy(&varBind[1].name, &MIB_ifMACEntAddr); do { // Submit the query. Responses will be loaded into varBindList. // We can expect this call to succeed a # of times corresponding // to the # of adapters reported to be in the system ret = m_Query(ASN_RFC1157_GETNEXTREQUEST, &varBindList, &errorStatus, &errorIndex); if (!ret) { ret = 1; } else { // Confirm that the proper type has been returned ret = SNMP_oidncmp(&varBind[0].name, &MIB_ifEntryType, MIB_ifEntryType.idLength); } if (!ret) { j++; dtmp = varBind[0].value.asnValue.number; // Type 6 describes ethernet interfaces if (dtmp == 6) { // Confirm that we have an address here ret = SNMP_oidncmp(&varBind[1].name, &MIB_ifMACEntAddr, MIB_ifMACEntAddr.idLength); if ( !ret && varBind[1].value.asnValue.address.stream != NULL ) { if ( (varBind[1].value.asnValue.address.stream[0] == 0x44) && (varBind[1].value.asnValue.address.stream[1] == 0x45) && (varBind[1].value.asnValue.address.stream[2] == 0x53) && (varBind[1].value.asnValue.address.stream[3] == 0x54) && (varBind[1].value.asnValue.address.stream[4] == 0x00) ) { // Ignore all dial-up networking adapters std::cerr << "Interface #" << j << " is a DUN adapter\n"; continue; } if ( (varBind[1].value.asnValue.address.stream[0] == 0x00) && (varBind[1].value.asnValue.address.stream[1] == 0x00) && (varBind[1].value.asnValue.address.stream[2] == 0x00) && (varBind[1].value.asnValue.address.stream[3] == 0x00) && (varBind[1].value.asnValue.address.stream[4] == 0x00) && (varBind[1].value.asnValue.address.stream[5] == 0x00) ) { // Ignore NULL addresses returned by other network // interfaces std::cerr << "Interface #" << j << " is a NULL address\n"; continue; } memcpy( addr, varBind[1].value.asnValue.address.stream, 6); } } } } while (!ret); // Free the bindings SNMP_FreeVarBind(&varBind[0]); SNMP_FreeVarBind(&varBind[1]); return 0; #endif //Win32 version // implementation for POSIX system #if defined(CMAKE_HAVE_NET_IF_ARP_H) && defined(__sun) //The POSIX version is broken anyway on Solaris, plus would require full //root power struct arpreq parpreq; struct sockaddr_in *psa; struct hostent *phost; char hostname[MAXHOSTNAMELEN]; char **paddrs; int sock, status=0; if(gethostname(hostname, MAXHOSTNAMELEN) != 0) { perror("gethostname"); return -1; } phost = gethostbyname(hostname); paddrs = phost->h_addr_list; sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if(sock == -1) { perror("sock"); return -1; } memset(&parpreq, 0, sizeof(struct arpreq)); psa = (struct sockaddr_in *) &parpreq.arp_pa; memset(psa, 0, sizeof(struct sockaddr_in)); psa->sin_family = AF_INET; memcpy(&psa->sin_addr, *paddrs, sizeof(struct in_addr)); status = ioctl(sock, SIOCGARP, &parpreq); if(status == -1) { perror("SIOCGARP"); return -1; } memcpy(addr, parpreq.arp_ha.sa_data, 6); return 0; #else #ifdef CMAKE_HAVE_NET_IF_H int sd; struct ifreq ifr, *ifrp; struct ifconf ifc; char buf[1024]; int n, i; unsigned char *a; #if defined(AF_LINK) && (!defined(SIOCGIFHWADDR) && !defined(SIOCGENADDR)) struct sockaddr_dl *sdlp; #endif // // BSD 4.4 defines the size of an ifreq to be // max(sizeof(ifreq), sizeof(ifreq.ifr_name)+ifreq.ifr_addr.sa_len // However, under earlier systems, sa_len isn't present, so the size is // just sizeof(struct ifreq) // We should investiage the use of SIZEOF_ADDR_IFREQ // #ifdef HAVE_SA_LEN #ifndef max #define max(a,b) ((a) > (b) ? (a) : (b)) #endif #define ifreq_size(i) max(sizeof(struct ifreq),\ sizeof((i).ifr_name)+(i).ifr_addr.sa_len) #else #define ifreq_size(i) sizeof(struct ifreq) #endif // HAVE_SA_LEN if( (sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP)) < 0 ) { return -1; } memset(buf, 0, sizeof(buf)); ifc.ifc_len = sizeof(buf); ifc.ifc_buf = buf; if (ioctl (sd, SIOCGIFCONF, (char *)&ifc) < 0) { close(sd); return -1; } n = ifc.ifc_len; for (i = 0; i < n; i+= ifreq_size(*ifrp) ) { ifrp = (struct ifreq *)((char *) ifc.ifc_buf+i); strncpy(ifr.ifr_name, ifrp->ifr_name, IFNAMSIZ); #ifdef SIOCGIFHWADDR if (ioctl(sd, SIOCGIFHWADDR, &ifr) < 0) continue; a = (unsigned char *) &ifr.ifr_hwaddr.sa_data; #else #ifdef SIOCGENADDR // In theory this call should also work on Sun Solaris, but apparently // SIOCGENADDR is not implemented properly thus the call // ioctl(sd, SIOCGENADDR, &ifr) always returns errno=2 // (No such file or directory) // Furthermore the DLAPI seems to require full root access if (ioctl(sd, SIOCGENADDR, &ifr) < 0) continue; a = (unsigned char *) ifr.ifr_enaddr; #else #ifdef AF_LINK sdlp = (struct sockaddr_dl *) &ifrp->ifr_addr; if ((sdlp->sdl_family != AF_LINK) || (sdlp->sdl_alen != 6)) continue; a = (unsigned char *) &sdlp->sdl_data[sdlp->sdl_nlen]; #else perror("No way to access hardware"); close(sd); return -1; #endif // AF_LINK #endif // SIOCGENADDR #endif // SIOCGIFHWADDR if (!a[0] && !a[1] && !a[2] && !a[3] && !a[4] && !a[5]) continue; if (addr) { memcpy(addr, a, 6); close(sd); return 0; } } close(sd); #endif // Not implemented platforms perror("There was a configuration problem on your plateform"); memset(addr,0,6); return -1; #endif //__sun } /** * \brief Mini function to return the last digit from a number express in base 256 * pre condition data contain an array of 6 unsigned char * post condition carry contain the last digit */ inline int getlastdigit(unsigned char *data) { int extended, carry = 0; for(int i=0;i<6;i++) { extended = (carry << 8) + data[i]; data[i] = extended / 10; carry = extended % 10; } return carry; } /** * \brief Encode the mac address on a fixed lenght string of 15 characters. * we save space this way. */ std::string Util::GetMACAddress() { // This code is the result of a long internet search to find something // as compact as possible (not OS independant). We only have to separate // 3 OS: Win32, SunOS and 'real' POSIX // http://groups-beta.google.com/group/comp.unix.solaris/msg/ad36929d783d63be // http://bdn.borland.com/article/0,1410,26040,00.html unsigned char addr[6]; int stat = GetMacAddrSys(addr); if (stat == 0) { // We need to convert a 6 digit number from base 256 to base 10, using integer // would requires a 48bits one. To avoid this we have to reimplement the div + modulo // with string only bool zero = false; int res; std::string sres; while(!zero) { res = getlastdigit(addr); sres.insert(sres.begin(), '0' + res); zero = (addr[0] == 0) && (addr[1] == 0) && (addr[2] == 0) && (addr[3] == 0) && (addr[4] == 0) && (addr[5] == 0); } return sres; } else { gdcmWarningMacro("Problem in finding the MAC Address"); return ""; } } /** * \brief Creates a new UID. As stipulate in the DICOM ref * each time a DICOM image is create it should have * a unique identifier (URI) * @param root is the DICOM prefix assigned by IOS group */ std::string Util::CreateUniqueUID(const std::string &root) { std::string prefix; std::string append; if( root.empty() ) { // gdcm UID prefix, as supplied by http://www.medicalconnections.co.uk prefix = RootUID; } else { prefix = root; } // A root was specified use it to forge our new UID: append += "."; //append += Util::GetMACAddress(); // to save CPU time append += Util::GDCM_MAC_ADRESS; append += "."; append += Util::GetCurrentDateTime(); //Also add a mini random number just in case: char tmp[10]; int r = (int) (100.0*rand()/RAND_MAX); // Don't use Util::Format to accelerate the execution sprintf(tmp,"%02d", r); append += tmp; // If append is too long we need to rehash it if( (prefix + append).size() > 64 ) { gdcmErrorMacro( "Size of UID is too long." ); // we need a hash function to truncate this number // if only md5 was cross plateform // MD5(append); } return prefix + append; } void Util::SetRootUID(const std::string &root) { if( root.empty() ) RootUID = GDCM_UID; else RootUID = root; } const std::string &Util::GetRootUID() { return RootUID; } //------------------------------------------------------------------------- /** * \brief binary_write binary_write * @param os ostream to write to * @param val val */ std::ostream &binary_write(std::ostream &os, const uint16_t &val) { #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION) uint16_t swap; //swap = ((( val << 8 ) & 0xff00 ) | (( val >> 8 ) & 0x00ff ) ); //save CPU time swap = ( val << 8 | val >> 8 ); return os.write(reinterpret_cast(&swap), 2); #else return os.write(reinterpret_cast(&val), 2); #endif //GDCM_WORDS_BIGENDIAN } /** * \brief binary_write binary_write * @param os ostream to write to * @param val val */ std::ostream &binary_write(std::ostream &os, const uint32_t &val) { #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION) uint32_t swap; // swap = ( ((val<<24) & 0xff000000) | ((val<<8) & 0x00ff0000) | // ((val>>8) & 0x0000ff00) | ((val>>24) & 0x000000ff) ); // save CPU time swap = ( (val<<24) | ((val<<8) & 0x00ff0000) | ((val>>8) & 0x0000ff00) | (val>>24) ); return os.write(reinterpret_cast(&swap), 4); #else return os.write(reinterpret_cast(&val), 4); #endif //GDCM_WORDS_BIGENDIAN } /** * \brief binary_write binary_write * @param os ostream to write to * @param val val */ std::ostream &binary_write(std::ostream &os, const char *val) { return os.write(val, strlen(val)); } /** * \brief * @param os ostream to write to * @param val val */ std::ostream &binary_write(std::ostream &os, std::string const &val) { return os.write(val.c_str(), val.size()); } /** * \brief binary_write binary_write * @param os ostream to write to * @param val value * @param len length of the 'value' to be written */ std::ostream &binary_write(std::ostream &os, const uint8_t *val, size_t len) { // We are writting sizeof(char) thus no need to swap bytes return os.write(reinterpret_cast(val), len); } /** * \brief binary_write binary_write * @param os ostream to write to * @param val val * @param len length of the 'value' to be written */ std::ostream &binary_write(std::ostream &os, const uint16_t *val, size_t len) { // This is tricky since we are writting two bytes buffer. // Be carefull with little endian vs big endian. // Also this other trick is to allocate a small (efficient) buffer that store // intermediate result before writting it. #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION) const int BUFFER_SIZE = 4096; static char buffer[BUFFER_SIZE]; uint16_t *binArea16 = (uint16_t*)val; //for the const // how many BUFFER_SIZE long pieces in binArea ? int nbPieces = len/BUFFER_SIZE; //(16 bits = 2 Bytes) int remainingSize = len%BUFFER_SIZE; for (int j=0;j> 8 | *binArea16 << 8; pbuffer++; binArea16++; } os.write ( buffer, BUFFER_SIZE ); } if ( remainingSize > 0) { uint16_t *pbuffer = (uint16_t*)buffer; //reinitialize pbuffer for (int i = 0; i < remainingSize/2; i++) { *pbuffer = *binArea16 >> 8 | *binArea16 << 8; pbuffer++; binArea16++; } os.write ( buffer, remainingSize ); } return os; #else return os.write(reinterpret_cast(val), len); #endif } //------------------------------------------------------------------------- // Protected //------------------------------------------------------------------------- // Private /** * \brief Return the IP adress of the machine writting the DICOM image */ std::string Util::GetIPAddress() { // This is a rip from // http://www.codeguru.com/Cpp/I-N/internet/network/article.php/c3445/ #ifndef HOST_NAME_MAX // SUSv2 guarantees that `Host names are limited to 255 bytes'. // POSIX 1003.1-2001 guarantees that `Host names (not including the // terminating NUL) are limited to HOST_NAME_MAX bytes'. #define HOST_NAME_MAX 255 // In this case we should maybe check the string was not truncated. // But I don't known how to check that... #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__) // with WinSock DLL we need to initialize the WinSock before using gethostname WORD wVersionRequested = MAKEWORD(1,0); WSADATA WSAData; int err = WSAStartup(wVersionRequested,&WSAData); if (err != 0) { // Tell the user that we could not find a usable // WinSock DLL. WSACleanup(); return "127.0.0.1"; } #endif #endif //HOST_NAME_MAX std::string str; char szHostName[HOST_NAME_MAX+1]; int r = gethostname(szHostName, HOST_NAME_MAX); if( r == 0 ) { // Get host adresses struct hostent *pHost = gethostbyname(szHostName); for( int i = 0; pHost!= NULL && pHost->h_addr_list[i]!= NULL; i++ ) { for( int j = 0; jh_length; j++ ) { if( j > 0 ) str += "."; str += Util::Format("%u", (unsigned int)((unsigned char*)pHost->h_addr_list[i])[j]); } // str now contains one local IP address #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__) WSACleanup(); #endif } } // If an error occur r == -1 // Most of the time it will return 127.0.0.1... return str; } //------------------------------------------------------------------------- } // end namespace gdcm