1 /*=========================================================================
4 Module: $RCSfile: gdcmUtil.cxx,v $
6 Date: $Date: 2005/08/25 14:55:47 $
7 Version: $Revision: 1.160 $
9 Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
10 l'Image). All rights reserved. See Doc/License.txt or
11 http://www.creatis.insa-lyon.fr/Public/Gdcm/License.html for details.
13 This software is distributed WITHOUT ANY WARRANTY; without even
14 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 PURPOSE. See the above copyright notices for more information.
17 =========================================================================*/
20 #include "gdcmDebug.h"
23 // For GetCurrentDate, GetCurrentTime
25 #include <sys/types.h>
28 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
29 #include <sys/timeb.h>
34 #include <stdarg.h> //only included in implementation file
35 #include <stdio.h> //only included in implementation file
37 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
38 #include <winsock.h> // for gethostname and gethostbyname and GetTickCount...
39 // I haven't find a way to determine wether we need to under GetCurrentTime or not...
40 // I think the best solution would simply to get rid of this problematic function
41 // and use a 'less' common name...
42 #if !defined(__BORLANDC__) || (__BORLANDC__ >= 0x0560)
46 #include <unistd.h> // for gethostname
47 #include <netdb.h> // for gethostbyname
58 #include <sys/types.h>
61 #ifdef CMAKE_HAVE_SYS_IOCTL_H
62 #include <sys/ioctl.h> // For SIOCGIFCONF on Linux
64 #ifdef CMAKE_HAVE_SYS_SOCKET_H
65 #include <sys/socket.h>
67 #ifdef CMAKE_HAVE_SYS_SOCKIO_H
68 #include <sys/sockio.h> // For SIOCGIFCONF on SunOS
70 #ifdef CMAKE_HAVE_NET_IF_H
73 #ifdef CMAKE_HAVE_NETINET_IN_H
74 #include <netinet/in.h> //For IPPROTO_IP
76 #ifdef CMAKE_HAVE_NET_IF_DL_H
77 #include <net/if_dl.h>
79 #if defined(CMAKE_HAVE_NET_IF_ARP_H) && defined(__sun)
80 // This is absolutely necessary on SunOS
81 #include <net/if_arp.h>
84 // For GetCurrentThreadID()
86 #include <sys/types.h>
87 #include <linux/unistd.h>
95 //-------------------------------------------------------------------------
96 const std::string Util::GDCM_UID = "1.2.826.0.1.3680043.2.1143";
97 std::string Util::RootUID = GDCM_UID;
98 const uint16_t Util::FMIV = 0x0001;
99 uint8_t *Util::FileMetaInformationVersion = (uint8_t *)&FMIV;
100 std::string Util::GDCM_MAC_ADRESS = GetMACAddress();
102 //-------------------------------------------------------------------------
105 * \brief Provide a better 'c++' approach for sprintf
106 * For example c code is:
107 * char result[200]; // hope 200 is enough
108 * sprintf(result, "%04x|%04x", group , elem);
111 * std::ostringstream buf;
112 * buf << std::right << std::setw(4) << std::setfill('0') << std::hex
113 * << group << "|" << std::right << std::setw(4) << std::setfill('0')
114 * << std::hex << elem;
119 * result = gdcm::Util::Format("%04x|%04x", group , elem);
121 std::string Util::Format(const char *format, ...)
125 va_start(args, format);
126 vsprintf(buffer, format, args); //might be a security flaw
127 va_end(args); // Each invocation of va_start should be matched
128 // by a corresponding invocation of va_end
129 // args is then 'undefined'
135 * \brief Because not available in C++ (?)
136 * @param str string to check
137 * @param tokens std::vector to receive the tokenized substrings
138 * @param delimiters string containing the character delimitors
141 void Util::Tokenize (const std::string &str,
142 std::vector<std::string> &tokens,
143 const std::string &delimiters)
145 std::string::size_type lastPos = str.find_first_not_of(delimiters,0);
146 std::string::size_type pos = str.find_first_of (delimiters,lastPos);
147 while (std::string::npos != pos || std::string::npos != lastPos)
149 tokens.push_back(str.substr(lastPos, pos - lastPos));
150 lastPos = str.find_first_not_of(delimiters, pos);
151 pos = str.find_first_of (delimiters, lastPos);
156 * \brief Because not available in C++ (?)
157 * Counts the number of occurences of a substring within a string
158 * @param str string to check
159 * @param subStr substring to count
162 int Util::CountSubstring (const std::string &str,
163 const std::string &subStr)
165 int count = 0; // counts how many times it appears
166 std::string::size_type x = 0; // The index position in the string
170 x = str.find(subStr,x); // Find the substring
171 if (x != std::string::npos) // If present
173 count++; // increase the count
174 x += subStr.length(); // Skip this word
177 while (x != std::string::npos);// Carry on until not present
183 * \brief Checks whether a 'string' is printable or not (in order
184 * to avoid corrupting the terminal of invocation when printing)
185 * @param s string to check
187 bool Util::IsCleanString(std::string const &s)
189 std::cout<< std::endl << s << std::endl;
190 for(unsigned int i=0; i<s.size(); i++)
192 std::cout<< std::endl << i << " : " << (unsigned char)s[i] << std::endl;
193 if (!isprint((unsigned char)s[i]) )
202 * \brief Checks whether an 'area' is printable or not (in order
203 * to avoid corrupting the terminal of invocation when printing)
204 * @param s string to check
206 bool Util::IsCleanArea(uint8_t *s, int l)
208 for( int i=0; i<l; i++)
210 if (!isprint((unsigned char)s[i]) )
218 * \brief Weed out a string from the non-printable characters (in order
219 * to avoid corrupting the terminal of invocation when printing)
220 * @param s string to remove non printable characters from
222 std::string Util::CreateCleanString(std::string const &s)
226 for(unsigned int i=0; i<str.size(); i++)
228 if (!isprint((unsigned char)str[i]) )
236 if (!isprint((unsigned char)s[str.size()-1]) )
238 if (s[str.size()-1] == 0 )
240 str[str.size()-1] = ' ';
249 * \brief Weed out a string from the non-printable characters (in order
250 * to avoid corrupting the terminal of invocation when printing)
251 * @param s string to remove non printable characters from
253 std::string Util::CreateCleanString(uint8_t *s, int l)
257 for( int i=0; i<l; i++)
259 if (!isprint((unsigned char)s[i]) )
265 str = str + (char )s[i];
273 * \brief Add a SEPARATOR to the end of the name is necessary
274 * @param pathname file/directory name to normalize
276 std::string Util::NormalizePath(std::string const &pathname)
278 const char SEPARATOR_X = '/';
279 const char SEPARATOR_WIN = '\\';
280 const std::string SEPARATOR = "/";
281 std::string name = pathname;
282 int size = name.size();
284 if ( name[size-1] != SEPARATOR_X && name[size-1] != SEPARATOR_WIN )
292 * \brief Get the (directory) path from a full path file name
293 * @param fullName file/directory name to extract Path from
295 std::string Util::GetPath(std::string const &fullName)
297 std::string res = fullName;
298 int pos1 = res.rfind("/");
299 int pos2 = res.rfind("\\");
313 * \brief Get the (last) name of a full path file name
314 * @param fullName file/directory name to extract end name from
316 std::string Util::GetName(std::string const &fullName)
318 std::string filename = fullName;
320 std::string::size_type slash_pos = filename.rfind("/");
321 std::string::size_type backslash_pos = filename.rfind("\\");
322 slash_pos = slash_pos > backslash_pos ? slash_pos : backslash_pos;
323 if (slash_pos != std::string::npos )
325 return filename.substr(slash_pos + 1);
334 * \brief Get the current date of the system in a dicom string
336 std::string Util::GetCurrentDate()
341 strftime(tmp,512,"%Y%m%d", localtime(&tloc) );
346 * \brief Get the current time of the system in a dicom string
348 std::string Util::GetCurrentTime()
353 strftime(tmp,512,"%H%M%S", localtime(&tloc) );
358 * \brief Get both the date and time at the same time to avoid problem
359 * around midnight where the two calls could be before and after midnight
361 std::string Util::GetCurrentDateTime()
367 // We need implementation specific functions to obtain millisecond precision
368 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
372 milliseconds = tb.millitm;
375 gettimeofday (&tv, NULL);
377 // Compute milliseconds from microseconds.
378 milliseconds = tv.tv_usec / 1000;
380 // Obtain the time of day, and convert it to a tm struct.
381 struct tm *ptm = localtime (&timep);
382 // Format the date and time, down to a single second.
383 strftime (tmp, sizeof (tmp), "%Y%m%d%H%M%S", ptm);
386 // Don't use Util::Format to accelerate execution of code
388 sprintf(tmpAll,"%s%03ld",tmp,milliseconds);
393 unsigned int Util::GetCurrentThreadID()
395 // FIXME the implementation is far from complete
396 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
397 return (unsigned int)GetCurrentThreadId();
401 // Doesn't work on fedora, but is in the man page...
402 //return (unsigned int)gettid();
405 return (unsigned int)thr_self();
407 //default implementation
414 unsigned int Util::GetCurrentProcessID()
416 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
417 // NOTE: There is also a _getpid()...
418 return (unsigned int)GetCurrentProcessId();
420 // get process identification, POSIX
421 return (unsigned int)getpid();
426 * \brief tells us whether the processor we are working with is BigEndian or not
428 bool Util::IsCurrentProcessorBigEndian()
430 #if defined(GDCM_WORDS_BIGENDIAN)
438 * \brief Create a /DICOM/ string:
439 * It should a of even length (no odd length ever)
440 * It can contain as many (if you are reading this from your
441 * editor the following character is backslash followed by zero
442 * that needed to be escaped with an extra backslash for doxygen) \\0
445 std::string Util::DicomString(const char *s, size_t l)
447 std::string r(s, s+l);
448 gdcmAssertMacro( !(r.size() % 2) ); // == basically 'l' is even
453 * \brief Create a /DICOM/ string:
454 * It should a of even length (no odd length ever)
455 * It can contain as many (if you are reading this from your
456 * editor the following character is backslash followed by zero
457 * that needed to be escaped with an extra backslash for doxygen) \\0
459 * This function is similar to DicomString(const char*),
460 * except it doesn't take a length.
461 * It only pad with a null character if length is odd
463 std::string Util::DicomString(const char *s)
465 size_t l = strlen(s);
470 std::string r(s, s+l);
471 gdcmAssertMacro( !(r.size() % 2) );
476 * \brief Safely check the equality of two Dicom String:
477 * - Both strings should be of even length
478 * - We allow padding of even length string by either a null
479 * character of a space
481 bool Util::DicomStringEqual(const std::string &s1, const char *s2)
483 // s2 is the string from the DICOM reference e.g. : 'MONOCHROME1'
484 std::string s1_even = s1; //Never change input parameter
485 std::string s2_even = DicomString( s2 );
486 if ( s1_even[s1_even.size()-1] == ' ' )
488 s1_even[s1_even.size()-1] = '\0'; //replace space character by null
490 return s1_even == s2_even;
494 * \brief Safely compare two Dicom String:
495 * - Both strings should be of even length
496 * - We allow padding of even length string by either a null
497 * character of a space
499 bool Util::CompareDicomString(const std::string &s1, const char *s2, int op)
501 // s2 is the string from the DICOM reference e.g. : 'MONOCHROME1'
502 std::string s1_even = s1; //Never change input parameter
503 std::string s2_even = DicomString( s2 );
504 if ( s1_even[s1_even.size()-1] == ' ' )
506 s1_even[s1_even.size()-1] = '\0'; //replace space character by null
511 return s1_even == s2_even;
512 case GDCM_DIFFERENT :
513 return s1_even != s2_even;
515 return s1_even > s2_even;
516 case GDCM_GREATEROREQUAL :
517 return s1_even >= s2_even;
519 return s1_even < s2_even;
520 case GDCM_LESSOREQUAL :
521 return s1_even <= s2_even;
523 gdcmDebugMacro(" Wrong operator : " << op);
529 typedef BOOL(WINAPI * pSnmpExtensionInit) (
530 IN DWORD dwTimeZeroReference,
531 OUT HANDLE * hPollForTrapEvent,
532 OUT AsnObjectIdentifier * supportedView);
534 typedef BOOL(WINAPI * pSnmpExtensionTrap) (
535 OUT AsnObjectIdentifier * enterprise,
536 OUT AsnInteger * genericTrap,
537 OUT AsnInteger * specificTrap,
538 OUT AsnTimeticks * timeStamp,
539 OUT RFC1157VarBindList * variableBindings);
541 typedef BOOL(WINAPI * pSnmpExtensionQuery) (
543 IN OUT RFC1157VarBindList * variableBindings,
544 OUT AsnInteger * errorStatus,
545 OUT AsnInteger * errorIndex);
547 typedef BOOL(WINAPI * pSnmpExtensionInitEx) (
548 OUT AsnObjectIdentifier * supportedView);
551 /// \brief gets current M.A.C adress (for internal use only)
552 int GetMacAddrSys ( unsigned char *addr );
553 int GetMacAddrSys ( unsigned char *addr )
557 if ( (WSAStartup(MAKEWORD(2, 0), &WinsockData)) != 0 )
559 std::cerr << "in Get MAC Adress (internal) : This program requires Winsock 2.x!"
564 HANDLE PollForTrapEvent;
565 AsnObjectIdentifier SupportedView;
566 UINT OID_ifEntryType[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 3 };
567 UINT OID_ifEntryNum[] = { 1, 3, 6, 1, 2, 1, 2, 1 };
568 UINT OID_ipMACEntAddr[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 6 };
569 AsnObjectIdentifier MIB_ifMACEntAddr = {
570 sizeof(OID_ipMACEntAddr) / sizeof(UINT), OID_ipMACEntAddr };
571 AsnObjectIdentifier MIB_ifEntryType = {
572 sizeof(OID_ifEntryType) / sizeof(UINT), OID_ifEntryType };
573 AsnObjectIdentifier MIB_ifEntryNum = {
574 sizeof(OID_ifEntryNum) / sizeof(UINT), OID_ifEntryNum };
575 RFC1157VarBindList varBindList;
576 RFC1157VarBind varBind[2];
577 AsnInteger errorStatus;
578 AsnInteger errorIndex;
579 AsnObjectIdentifier MIB_NULL = { 0, 0 };
584 // Load the SNMP dll and get the addresses of the functions necessary
585 HINSTANCE m_hInst = LoadLibrary("inetmib1.dll");
586 if (m_hInst < (HINSTANCE) HINSTANCE_ERROR)
590 pSnmpExtensionInit m_Init =
591 (pSnmpExtensionInit) GetProcAddress(m_hInst, "SnmpExtensionInit");
592 pSnmpExtensionQuery m_Query =
593 (pSnmpExtensionQuery) GetProcAddress(m_hInst, "SnmpExtensionQuery");
594 m_Init(GetTickCount(), &PollForTrapEvent, &SupportedView);
596 /* Initialize the variable list to be retrieved by m_Query */
597 varBindList.list = varBind;
598 varBind[0].name = MIB_NULL;
599 varBind[1].name = MIB_NULL;
601 // Copy in the OID to find the number of entries in the
603 varBindList.len = 1; // Only retrieving one item
604 SNMP_oidcpy(&varBind[0].name, &MIB_ifEntryNum);
605 m_Query(ASN_RFC1157_GETNEXTREQUEST, &varBindList, &errorStatus,
607 // printf("# of adapters in this system : %i\n",
608 // varBind[0].value.asnValue.number);
611 // Copy in the OID of ifType, the type of interface
612 SNMP_oidcpy(&varBind[0].name, &MIB_ifEntryType);
614 // Copy in the OID of ifPhysAddress, the address
615 SNMP_oidcpy(&varBind[1].name, &MIB_ifMACEntAddr);
619 // Submit the query. Responses will be loaded into varBindList.
620 // We can expect this call to succeed a # of times corresponding
621 // to the # of adapters reported to be in the system
622 ret = m_Query(ASN_RFC1157_GETNEXTREQUEST, &varBindList, &errorStatus,
630 // Confirm that the proper type has been returned
631 ret = SNMP_oidncmp(&varBind[0].name, &MIB_ifEntryType,
632 MIB_ifEntryType.idLength);
637 dtmp = varBind[0].value.asnValue.number;
639 // Type 6 describes ethernet interfaces
642 // Confirm that we have an address here
643 ret = SNMP_oidncmp(&varBind[1].name, &MIB_ifMACEntAddr,
644 MIB_ifMACEntAddr.idLength);
645 if ( !ret && varBind[1].value.asnValue.address.stream != NULL )
647 if ( (varBind[1].value.asnValue.address.stream[0] == 0x44)
648 && (varBind[1].value.asnValue.address.stream[1] == 0x45)
649 && (varBind[1].value.asnValue.address.stream[2] == 0x53)
650 && (varBind[1].value.asnValue.address.stream[3] == 0x54)
651 && (varBind[1].value.asnValue.address.stream[4] == 0x00) )
653 // Ignore all dial-up networking adapters
654 std::cerr << "in Get MAC Adress (internal) : Interface #"
655 << j << " is a DUN adapter\n";
658 if ( (varBind[1].value.asnValue.address.stream[0] == 0x00)
659 && (varBind[1].value.asnValue.address.stream[1] == 0x00)
660 && (varBind[1].value.asnValue.address.stream[2] == 0x00)
661 && (varBind[1].value.asnValue.address.stream[3] == 0x00)
662 && (varBind[1].value.asnValue.address.stream[4] == 0x00)
663 && (varBind[1].value.asnValue.address.stream[5] == 0x00) )
665 // Ignore NULL addresses returned by other network
667 std::cerr << "in Get MAC Adress (internal) : Interface #"
668 << j << " is a NULL address\n";
671 memcpy( addr, varBind[1].value.asnValue.address.stream, 6);
678 SNMP_FreeVarBind(&varBind[0]);
679 SNMP_FreeVarBind(&varBind[1]);
681 #endif //Win32 version
684 // implementation for POSIX system
685 #if defined(CMAKE_HAVE_NET_IF_ARP_H) && defined(__sun)
686 //The POSIX version is broken anyway on Solaris, plus would require full
688 struct arpreq parpreq;
689 struct sockaddr_in *psa;
690 struct hostent *phost;
691 char hostname[MAXHOSTNAMELEN];
695 if (gethostname(hostname, MAXHOSTNAMELEN) != 0 )
697 perror("in Get MAC Adress (internal) : gethostname");
700 phost = gethostbyname(hostname);
701 paddrs = phost->h_addr_list;
703 sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
706 perror("in Get MAC Adress (internal) : sock");
709 memset(&parpreq, 0, sizeof(struct arpreq));
710 psa = (struct sockaddr_in *) &parpreq.arp_pa;
712 memset(psa, 0, sizeof(struct sockaddr_in));
713 psa->sin_family = AF_INET;
714 memcpy(&psa->sin_addr, *paddrs, sizeof(struct in_addr));
716 status = ioctl(sock, SIOCGARP, &parpreq);
719 perror("in Get MAC Adress (internal) : SIOCGARP");
722 memcpy(addr, parpreq.arp_ha.sa_data, 6);
726 #ifdef CMAKE_HAVE_NET_IF_H
728 struct ifreq ifr, *ifrp;
733 #if defined(AF_LINK) && (!defined(SIOCGIFHWADDR) && !defined(SIOCGENADDR))
734 struct sockaddr_dl *sdlp;
738 // BSD 4.4 defines the size of an ifreq to be
739 // max(sizeof(ifreq), sizeof(ifreq.ifr_name)+ifreq.ifr_addr.sa_len
740 // However, under earlier systems, sa_len isn't present, so the size is
741 // just sizeof(struct ifreq)
742 // We should investigate the use of SIZEOF_ADDR_IFREQ
746 #define max(a,b) ((a) > (b) ? (a) : (b))
748 #define ifreq_size(i) max(sizeof(struct ifreq),\
749 sizeof((i).ifr_name)+(i).ifr_addr.sa_len)
751 #define ifreq_size(i) sizeof(struct ifreq)
752 #endif // HAVE_SA_LEN
754 if ( (sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP)) < 0 )
758 memset(buf, 0, sizeof(buf));
759 ifc.ifc_len = sizeof(buf);
761 if (ioctl (sd, SIOCGIFCONF, (char *)&ifc) < 0)
767 for (i = 0; i < n; i+= ifreq_size(*ifrp) )
769 ifrp = (struct ifreq *)((char *) ifc.ifc_buf+i);
770 strncpy(ifr.ifr_name, ifrp->ifr_name, IFNAMSIZ);
772 if (ioctl(sd, SIOCGIFHWADDR, &ifr) < 0)
774 a = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
777 // In theory this call should also work on Sun Solaris, but apparently
778 // SIOCGENADDR is not implemented properly thus the call
779 // ioctl(sd, SIOCGENADDR, &ifr) always returns errno=2
780 // (No such file or directory)
781 // Furthermore the DLAPI seems to require full root access
782 if (ioctl(sd, SIOCGENADDR, &ifr) < 0)
784 a = (unsigned char *) ifr.ifr_enaddr;
787 sdlp = (struct sockaddr_dl *) &ifrp->ifr_addr;
788 if ((sdlp->sdl_family != AF_LINK) || (sdlp->sdl_alen != 6))
790 a = (unsigned char *) &sdlp->sdl_data[sdlp->sdl_nlen];
792 perror("in Get MAC Adress (internal) : No way to access hardware");
796 #endif // SIOCGENADDR
797 #endif // SIOCGIFHWADDR
798 if (!a[0] && !a[1] && !a[2] && !a[3] && !a[4] && !a[5]) continue;
809 // Not implemented platforms
810 perror("in Get MAC Adress (internal) : There was a configuration problem on your plateform");
817 * \brief Mini function to return the last digit from a number express in base 256
818 * pre condition data contain an array of 6 unsigned char
819 * post condition carry contain the last digit
821 inline int getlastdigit(unsigned char *data)
823 int extended, carry = 0;
826 extended = (carry << 8) + data[i];
827 data[i] = extended / 10;
828 carry = extended % 10;
834 * \brief Encode the mac address on a fixed lenght string of 15 characters.
835 * we save space this way.
837 std::string Util::GetMACAddress()
839 // This code is the result of a long internet search to find something
840 // as compact as possible (not OS independant). We only have to separate
841 // 3 OS: Win32, SunOS and 'real' POSIX
842 // http://groups-beta.google.com/group/comp.unix.solaris/msg/ad36929d783d63be
843 // http://bdn.borland.com/article/0,1410,26040,00.html
844 unsigned char addr[6];
846 int stat = GetMacAddrSys(addr);
849 // We need to convert a 6 digit number from base 256 to base 10, using integer
850 // would requires a 48bits one. To avoid this we have to reimplement the div + modulo
857 res = getlastdigit(addr);
858 sres.insert(sres.begin(), '0' + res);
859 zero = (addr[0] == 0) && (addr[1] == 0) && (addr[2] == 0)
860 && (addr[3] == 0) && (addr[4] == 0) && (addr[5] == 0);
867 gdcmWarningMacro("Problem in finding the MAC Address");
873 * \brief Creates a new UID. As stipulate in the DICOM ref
874 * each time a DICOM image is create it should have
875 * a unique identifier (URI)
876 * @param root is the DICOM prefix assigned by IOS group
878 std::string Util::CreateUniqueUID(const std::string &root)
884 // gdcm UID prefix, as supplied by http://www.medicalconnections.co.uk
892 // A root was specified use it to forge our new UID:
894 //append += Util::GetMACAddress(); // to save CPU time
895 append += Util::GDCM_MAC_ADRESS;
897 append += Util::GetCurrentDateTime();
899 //Also add a mini random number just in case:
901 int r = (int) (100.0*rand()/RAND_MAX);
902 // Don't use Util::Format to accelerate the execution
903 sprintf(tmp,"%02d", r);
906 // If append is too long we need to rehash it
907 if ( (prefix + append).size() > 64 )
909 gdcmErrorMacro( "Size of UID is too long." );
910 // we need a hash function to truncate this number
911 // if only md5 was cross plateform
915 return prefix + append;
918 void Util::SetRootUID(const std::string &root)
926 const std::string &Util::GetRootUID()
931 //-------------------------------------------------------------------------
933 * \brief binary_write binary_write
934 * @param os ostream to write to
937 std::ostream &binary_write(std::ostream &os, const uint16_t &val)
939 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
941 //swap = ((( val << 8 ) & 0xff00 ) | (( val >> 8 ) & 0x00ff ) );
943 swap = ( val << 8 | val >> 8 );
945 return os.write(reinterpret_cast<const char*>(&swap), 2);
947 return os.write(reinterpret_cast<const char*>(&val), 2);
948 #endif //GDCM_WORDS_BIGENDIAN
952 * \brief binary_write binary_write
953 * @param os ostream to write to
956 std::ostream &binary_write(std::ostream &os, const uint32_t &val)
958 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
960 // swap = ( ((val<<24) & 0xff000000) | ((val<<8) & 0x00ff0000) |
961 // ((val>>8) & 0x0000ff00) | ((val>>24) & 0x000000ff) );
963 swap = ( (val<<24) | ((val<<8) & 0x00ff0000) |
964 ((val>>8) & 0x0000ff00) | (val>>24) );
965 return os.write(reinterpret_cast<const char*>(&swap), 4);
967 return os.write(reinterpret_cast<const char*>(&val), 4);
968 #endif //GDCM_WORDS_BIGENDIAN
972 * \brief binary_write binary_write
973 * @param os ostream to write to
976 std::ostream &binary_write(std::ostream &os, const char *val)
978 return os.write(val, strlen(val));
983 * @param os ostream to write to
986 std::ostream &binary_write(std::ostream &os, std::string const &val)
988 return os.write(val.c_str(), val.size());
992 * \brief binary_write binary_write
993 * @param os ostream to write to
995 * @param len length of the 'value' to be written
997 std::ostream &binary_write(std::ostream &os, const uint8_t *val, size_t len)
999 // We are writting sizeof(char) thus no need to swap bytes
1000 return os.write(reinterpret_cast<const char*>(val), len);
1004 * \brief binary_write binary_write
1005 * @param os ostream to write to
1007 * @param len length of the 'value' to be written
1009 std::ostream &binary_write(std::ostream &os, const uint16_t *val, size_t len)
1011 // This is tricky since we are writting two bytes buffer.
1012 // Be carefull with little endian vs big endian.
1013 // Also this other trick is to allocate a small (efficient) buffer that store
1014 // intermediate result before writting it.
1015 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
1016 const int BUFFER_SIZE = 4096;
1017 static char buffer[BUFFER_SIZE];
1018 uint16_t *binArea16 = (uint16_t*)val; //for the const
1020 // how many BUFFER_SIZE long pieces in binArea ?
1021 int nbPieces = len/BUFFER_SIZE; //(16 bits = 2 Bytes)
1022 int remainingSize = len%BUFFER_SIZE;
1024 for (int j=0;j<nbPieces;j++)
1026 uint16_t *pbuffer = (uint16_t*)buffer; //reinitialize pbuffer
1027 for (int i = 0; i < BUFFER_SIZE/2; i++)
1029 *pbuffer = *binArea16 >> 8 | *binArea16 << 8;
1033 os.write ( buffer, BUFFER_SIZE );
1035 if ( remainingSize > 0)
1037 uint16_t *pbuffer = (uint16_t*)buffer; //reinitialize pbuffer
1038 for (int i = 0; i < remainingSize/2; i++)
1040 *pbuffer = *binArea16 >> 8 | *binArea16 << 8;
1044 os.write ( buffer, remainingSize );
1048 return os.write(reinterpret_cast<const char*>(val), len);
1052 //-------------------------------------------------------------------------
1055 //-------------------------------------------------------------------------
1058 * \brief Return the IP adress of the machine writting the DICOM image
1060 std::string Util::GetIPAddress()
1062 // This is a rip from
1063 // http://www.codeguru.com/Cpp/I-N/internet/network/article.php/c3445/
1064 #ifndef HOST_NAME_MAX
1065 // SUSv2 guarantees that `Host names are limited to 255 bytes'.
1066 // POSIX 1003.1-2001 guarantees that `Host names (not including the
1067 // terminating NUL) are limited to HOST_NAME_MAX bytes'.
1068 #define HOST_NAME_MAX 255
1069 // In this case we should maybe check the string was not truncated.
1070 // But I don't known how to check that...
1071 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
1072 // with WinSock DLL we need to initialize the WinSock before using gethostname
1073 WORD wVersionRequested = MAKEWORD(1,0);
1075 int err = WSAStartup(wVersionRequested,&WSAData);
1078 // Tell the user that we could not find a usable
1085 #endif //HOST_NAME_MAX
1088 char szHostName[HOST_NAME_MAX+1];
1089 int r = gethostname(szHostName, HOST_NAME_MAX);
1093 // Get host adresses
1094 struct hostent *pHost = gethostbyname(szHostName);
1096 for( int i = 0; pHost!= NULL && pHost->h_addr_list[i]!= NULL; i++ )
1098 for( int j = 0; j<pHost->h_length; j++ )
1100 if ( j > 0 ) str += ".";
1102 str += Util::Format("%u",
1103 (unsigned int)((unsigned char*)pHost->h_addr_list[i])[j]);
1105 // str now contains one local IP address
1107 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
1113 // If an error occur r == -1
1114 // Most of the time it will return 127.0.0.1...
1118 //-------------------------------------------------------------------------
1119 } // end namespace gdcm