1 /*=========================================================================
4 Module: $RCSfile: gdcmUtil.cxx,v $
6 Date: $Date: 2005/11/29 13:02:46 $
7 Version: $Revision: 1.179 $
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 #include <stdarg.h> // for va_list
25 // For GetCurrentDate, GetCurrentTime
27 #include <sys/types.h>
30 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
31 #include <sys/timeb.h>
36 #include <stdarg.h> //only included in implementation file
37 #include <stdio.h> //only included in implementation file
39 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
40 #include <winsock.h> // for gethostname and gethostbyname and GetTickCount...
41 // I haven't find a way to determine wether we need to under GetCurrentTime or not...
42 // I think the best solution would simply to get rid of this problematic function
43 // and use a 'less' common name...
44 #if !defined(__BORLANDC__) || (__BORLANDC__ >= 0x0560)
48 #include <unistd.h> // for gethostname
49 #include <netdb.h> // for gethostbyname
60 #include <sys/types.h>
63 #ifdef CMAKE_HAVE_SYS_IOCTL_H
64 #include <sys/ioctl.h> // For SIOCGIFCONF on Linux
66 #ifdef CMAKE_HAVE_SYS_SOCKET_H
67 #include <sys/socket.h>
69 #ifdef CMAKE_HAVE_SYS_SOCKIO_H
70 #include <sys/sockio.h> // For SIOCGIFCONF on SunOS
72 #ifdef CMAKE_HAVE_NET_IF_H
75 #ifdef CMAKE_HAVE_NETINET_IN_H
76 #include <netinet/in.h> //For IPPROTO_IP
78 #ifdef CMAKE_HAVE_NET_IF_DL_H
79 #include <net/if_dl.h>
81 #if defined(CMAKE_HAVE_NET_IF_ARP_H) && defined(__sun)
82 // This is absolutely necessary on SunOS
83 #include <net/if_arp.h>
86 // For GetCurrentThreadID()
88 #include <sys/types.h>
89 #include <linux/unistd.h>
97 //-------------------------------------------------------------------------
98 const std::string Util::GDCM_UID = "1.2.826.0.1.3680043.2.1143";
99 std::string Util::RootUID = GDCM_UID;
101 * File Meta Information Version (0002,0001) shall contain a two byte OB
102 * value consisting of a 0x00 byte, followed by 0x01 byte, and not the
103 * value 0x0001 encoded as a little endian 16 bit short value,
104 * which would be the other way around...
106 const uint16_t Util::FMIV = 0x0100;
107 uint8_t *Util::FileMetaInformationVersion = (uint8_t *)&FMIV;
108 std::string Util::GDCM_MAC_ADRESS = GetMACAddress();
110 //-------------------------------------------------------------------------
113 * \brief Provide a better 'c++' approach for sprintf
114 * For example c code is:
115 * char result[2048]; // hope 2048 is enough
116 * sprintf(result, "%04x|%04x", group , elem);
119 * std::ostringstream buf;
120 * buf << std::right << std::setw(4) << std::setfill('0') << std::hex
121 * << group << "|" << std::right << std::setw(4) << std::setfill('0')
122 * << std::hex << elem;
127 * result = gdcm::Util::Format("%04x|%04x", group , elem);
129 std::string Util::Format(const char *format, ...)
131 char buffer[2048]; // hope 2048 is enough
133 va_start(args, format);
134 vsprintf(buffer, format, args); //might be a security flaw
135 va_end(args); // Each invocation of va_start should be matched
136 // by a corresponding invocation of va_end
137 // args is then 'undefined'
143 * \brief Because not available in C++ (?)
144 * @param str string to check
145 * @param tokens std::vector to receive the tokenized substrings
146 * @param delimiters string containing the character delimitors
149 void Util::Tokenize (const std::string &str,
150 std::vector<std::string> &tokens,
151 const std::string &delimiters)
153 std::string::size_type lastPos = str.find_first_not_of(delimiters,0);
154 std::string::size_type pos = str.find_first_of (delimiters,lastPos);
155 while (std::string::npos != pos || std::string::npos != lastPos)
157 tokens.push_back(str.substr(lastPos, pos - lastPos));
158 lastPos = str.find_first_not_of(delimiters, pos);
159 pos = str.find_first_of (delimiters, lastPos);
164 * \brief Because not available in C++ (?)
165 * Counts the number of occurences of a substring within a string
166 * @param str string to check
167 * @param subStr substring to count
170 int Util::CountSubstring (const std::string &str,
171 const std::string &subStr)
173 int count = 0; // counts how many times it appears
174 std::string::size_type x = 0; // The index position in the string
178 x = str.find(subStr,x); // Find the substring
179 if (x != std::string::npos) // If present
181 count++; // increase the count
182 x += subStr.length(); // Skip this word
185 while (x != std::string::npos);// Carry on until not present
191 * \brief Checks whether a 'string' is printable or not (in order
192 * to avoid corrupting the terminal of invocation when printing)
193 * @param s string to check
195 bool Util::IsCleanString(std::string const &s)
197 //std::cout<< std::endl << s << std::endl;
198 for(unsigned int i=0; i<s.size(); i++)
200 if (!isprint((unsigned char)s[i]) )
209 * \brief Checks whether an 'area' is printable or not (in order
210 * to avoid corrupting the terminal of invocation when printing)
211 * @param s area to check (uint8_t is just for prototyping. feel free to cast)
212 * @param l area length to check
214 bool Util::IsCleanArea(uint8_t *s, int l)
216 for( int i=0; i<l; i++)
218 if (!isprint((unsigned char)s[i]) )
226 * \brief Weed out a string from the non-printable characters (in order
227 * to avoid corrupting the terminal of invocation when printing)
228 * @param s string to check (uint8_t is just for prototyping. feel free to cast)
230 std::string Util::CreateCleanString(std::string const &s)
234 for(unsigned int i=0; i<str.size(); i++)
236 if (!isprint((unsigned char)str[i]) )
244 if (!isprint((unsigned char)s[str.size()-1]) )
246 if (s[str.size()-1] == 0 )
248 str[str.size()-1] = ' ';
257 * \brief Weed out a string from the non-printable characters (in order
258 * to avoid corrupting the terminal of invocation when printing)
259 * @param s area to process (uint8_t is just for prototyping. feel free to cast)
260 * @param l area length to check
262 std::string Util::CreateCleanString(uint8_t *s, int l)
266 for( int i=0; i<l; i++)
268 if (!isprint((unsigned char)s[i]) )
274 str = str + (char )s[i];
281 * \brief Add a SEPARATOR to the end of the name is necessary
282 * @param pathname file/directory name to normalize
284 std::string Util::NormalizePath(std::string const &pathname)
286 const char SEPARATOR_X = '/';
287 const char SEPARATOR_WIN = '\\';
288 const std::string SEPARATOR = "/";
289 std::string name = pathname;
290 int size = name.size();
292 if ( name[size-1] != SEPARATOR_X && name[size-1] != SEPARATOR_WIN )
300 * \brief Get the (directory) path from a full path file name
301 * @param fullName file/directory name to extract Path from
303 std::string Util::GetPath(std::string const &fullName)
305 std::string res = fullName;
306 int pos1 = res.rfind("/");
307 int pos2 = res.rfind("\\");
321 * \brief Get the (last) name of a full path file name
322 * @param fullName file/directory name to extract end name from
324 std::string Util::GetName(std::string const &fullName)
326 std::string filename = fullName;
328 std::string::size_type slash_pos = filename.rfind("/");
329 std::string::size_type backslash_pos = filename.rfind("\\");
330 slash_pos = slash_pos > backslash_pos ? slash_pos : backslash_pos;
331 if (slash_pos != std::string::npos )
333 return filename.substr(slash_pos + 1);
342 * \brief Get the current date of the system in a dicom string
344 std::string Util::GetCurrentDate()
349 strftime(tmp,512,"%Y%m%d", localtime(&tloc) );
354 * \brief Get the current time of the system in a dicom string
356 std::string Util::GetCurrentTime()
361 strftime(tmp,512,"%H%M%S", localtime(&tloc) );
366 * \brief Get both the date and time at the same time to avoid problem
367 * around midnight where the two calls could be before and after midnight
369 std::string Util::GetCurrentDateTime()
375 // We need implementation specific functions to obtain millisecond precision
376 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
380 milliseconds = tb.millitm;
383 gettimeofday (&tv, NULL);
385 // Compute milliseconds from microseconds.
386 milliseconds = tv.tv_usec / 1000;
388 // Obtain the time of day, and convert it to a tm struct.
389 struct tm *ptm = localtime (&timep);
390 // Format the date and time, down to a single second.
391 strftime (tmp, sizeof (tmp), "%Y%m%d%H%M%S", ptm);
394 // Don't use Util::Format to accelerate execution of code
396 sprintf(tmpAll,"%s%03ld",tmp,milliseconds);
401 unsigned int Util::GetCurrentThreadID()
403 // FIXME the implementation is far from complete
404 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
405 return (unsigned int)GetCurrentThreadId();
409 // Doesn't work on fedora, but is in the man page...
410 //return (unsigned int)gettid();
413 return (unsigned int)thr_self();
415 //default implementation
422 unsigned int Util::GetCurrentProcessID()
424 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
425 // NOTE: There is also a _getpid()...
426 return (unsigned int)GetCurrentProcessId();
428 // get process identification, POSIX
429 return (unsigned int)getpid();
434 * \brief tells us whether the processor we are working with is BigEndian or not
436 bool Util::IsCurrentProcessorBigEndian()
438 #if defined(GDCM_WORDS_BIGENDIAN)
446 * \brief Create a /DICOM/ string:
447 * It should a of even length (no odd length ever)
448 * It can contain as many (if you are reading this from your
449 * editor the following character is backslash followed by zero
450 * that needed to be escaped with an extra backslash for doxygen) \\0
453 std::string Util::DicomString(const char *s, size_t l)
455 std::string r(s, s+l);
456 gdcmAssertMacro( !(r.size() % 2) ); // == basically 'l' is even
461 * \brief Create a /DICOM/ string:
462 * It should a of even length (no odd length ever)
463 * It can contain as many (if you are reading this from your
464 * editor the following character is backslash followed by zero
465 * that needed to be escaped with an extra backslash for doxygen) \\0
467 * This function is similar to DicomString(const char*),
468 * except it doesn't take a length.
469 * It only pad with a null character if length is odd
471 std::string Util::DicomString(const char *s)
473 size_t l = strlen(s);
478 std::string r(s, s+l);
479 gdcmAssertMacro( !(r.size() % 2) );
484 * \brief Safely check the equality of two Dicom String:
485 * - Both strings should be of even length
486 * - We allow padding of even length string by either a null
487 * character of a space
489 bool Util::DicomStringEqual(const std::string &s1, const char *s2)
491 // s2 is the string from the DICOM reference e.g. : 'MONOCHROME1'
492 std::string s1_even = s1; //Never change input parameter
493 std::string s2_even = DicomString( s2 );
494 if ( s1_even[s1_even.size()-1] == ' ' )
496 s1_even[s1_even.size()-1] = '\0'; //replace space character by null
498 return s1_even == s2_even;
502 * \brief Safely compare two Dicom String:
503 * - Both strings should be of even length
504 * - We allow padding of even length string by either a null
505 * character of a space
507 bool Util::CompareDicomString(const std::string &s1, const char *s2, int op)
509 // s2 is the string from the DICOM reference e.g. : 'MONOCHROME1'
510 std::string s1_even = s1; //Never change input parameter
511 std::string s2_even = DicomString( s2 );
512 if ( s1_even[s1_even.size()-1] == ' ' )
514 s1_even[s1_even.size()-1] = '\0'; //replace space character by null
519 return s1_even == s2_even;
520 case GDCM_DIFFERENT :
521 return s1_even != s2_even;
523 return s1_even > s2_even;
524 case GDCM_GREATEROREQUAL :
525 return s1_even >= s2_even;
527 return s1_even < s2_even;
528 case GDCM_LESSOREQUAL :
529 return s1_even <= s2_even;
531 gdcmDebugMacro(" Wrong operator : " << op);
537 typedef BOOL(WINAPI * pSnmpExtensionInit) (
538 IN DWORD dwTimeZeroReference,
539 OUT HANDLE * hPollForTrapEvent,
540 OUT AsnObjectIdentifier * supportedView);
542 typedef BOOL(WINAPI * pSnmpExtensionTrap) (
543 OUT AsnObjectIdentifier * enterprise,
544 OUT AsnInteger * genericTrap,
545 OUT AsnInteger * specificTrap,
546 OUT AsnTimeticks * timeStamp,
547 OUT RFC1157VarBindList * variableBindings);
549 typedef BOOL(WINAPI * pSnmpExtensionQuery) (
551 IN OUT RFC1157VarBindList * variableBindings,
552 OUT AsnInteger * errorStatus,
553 OUT AsnInteger * errorIndex);
555 typedef BOOL(WINAPI * pSnmpExtensionInitEx) (
556 OUT AsnObjectIdentifier * supportedView);
559 /// \brief gets current M.A.C adress (for internal use only)
560 int GetMacAddrSys ( unsigned char *addr );
561 int GetMacAddrSys ( unsigned char *addr )
565 if ( (WSAStartup(MAKEWORD(2, 0), &WinsockData)) != 0 )
567 std::cerr << "in Get MAC Adress (internal) : This program requires Winsock 2.x!"
572 HANDLE PollForTrapEvent;
573 AsnObjectIdentifier SupportedView;
574 UINT OID_ifEntryType[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 3 };
575 UINT OID_ifEntryNum[] = { 1, 3, 6, 1, 2, 1, 2, 1 };
576 UINT OID_ipMACEntAddr[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 6 };
577 AsnObjectIdentifier MIB_ifMACEntAddr = {
578 sizeof(OID_ipMACEntAddr) / sizeof(UINT), OID_ipMACEntAddr };
579 AsnObjectIdentifier MIB_ifEntryType = {
580 sizeof(OID_ifEntryType) / sizeof(UINT), OID_ifEntryType };
581 AsnObjectIdentifier MIB_ifEntryNum = {
582 sizeof(OID_ifEntryNum) / sizeof(UINT), OID_ifEntryNum };
583 RFC1157VarBindList varBindList;
584 RFC1157VarBind varBind[2];
585 AsnInteger errorStatus;
586 AsnInteger errorIndex;
587 AsnObjectIdentifier MIB_NULL = { 0, 0 };
592 // Load the SNMP dll and get the addresses of the functions necessary
593 HINSTANCE m_hInst = LoadLibrary("inetmib1.dll");
594 if (m_hInst < (HINSTANCE) HINSTANCE_ERROR)
598 pSnmpExtensionInit m_Init =
599 (pSnmpExtensionInit) GetProcAddress(m_hInst, "SnmpExtensionInit");
600 pSnmpExtensionQuery m_Query =
601 (pSnmpExtensionQuery) GetProcAddress(m_hInst, "SnmpExtensionQuery");
602 m_Init(GetTickCount(), &PollForTrapEvent, &SupportedView);
604 /* Initialize the variable list to be retrieved by m_Query */
605 varBindList.list = varBind;
606 varBind[0].name = MIB_NULL;
607 varBind[1].name = MIB_NULL;
609 // Copy in the OID to find the number of entries in the
611 varBindList.len = 1; // Only retrieving one item
612 SNMP_oidcpy(&varBind[0].name, &MIB_ifEntryNum);
613 m_Query(ASN_RFC1157_GETNEXTREQUEST, &varBindList, &errorStatus,
615 // printf("# of adapters in this system : %i\n",
616 // varBind[0].value.asnValue.number);
619 // Copy in the OID of ifType, the type of interface
620 SNMP_oidcpy(&varBind[0].name, &MIB_ifEntryType);
622 // Copy in the OID of ifPhysAddress, the address
623 SNMP_oidcpy(&varBind[1].name, &MIB_ifMACEntAddr);
627 // Submit the query. Responses will be loaded into varBindList.
628 // We can expect this call to succeed a # of times corresponding
629 // to the # of adapters reported to be in the system
630 ret = m_Query(ASN_RFC1157_GETNEXTREQUEST, &varBindList, &errorStatus,
638 // Confirm that the proper type has been returned
639 ret = SNMP_oidncmp(&varBind[0].name, &MIB_ifEntryType,
640 MIB_ifEntryType.idLength);
645 dtmp = varBind[0].value.asnValue.number;
647 // Type 6 describes ethernet interfaces
650 // Confirm that we have an address here
651 ret = SNMP_oidncmp(&varBind[1].name, &MIB_ifMACEntAddr,
652 MIB_ifMACEntAddr.idLength);
653 if ( !ret && varBind[1].value.asnValue.address.stream != NULL )
655 if ( (varBind[1].value.asnValue.address.stream[0] == 0x44)
656 && (varBind[1].value.asnValue.address.stream[1] == 0x45)
657 && (varBind[1].value.asnValue.address.stream[2] == 0x53)
658 && (varBind[1].value.asnValue.address.stream[3] == 0x54)
659 && (varBind[1].value.asnValue.address.stream[4] == 0x00) )
661 // Ignore all dial-up networking adapters
662 std::cerr << "in Get MAC Adress (internal) : Interface #"
663 << j << " is a DUN adapter\n";
666 if ( (varBind[1].value.asnValue.address.stream[0] == 0x00)
667 && (varBind[1].value.asnValue.address.stream[1] == 0x00)
668 && (varBind[1].value.asnValue.address.stream[2] == 0x00)
669 && (varBind[1].value.asnValue.address.stream[3] == 0x00)
670 && (varBind[1].value.asnValue.address.stream[4] == 0x00)
671 && (varBind[1].value.asnValue.address.stream[5] == 0x00) )
673 // Ignore NULL addresses returned by other network
675 std::cerr << "in Get MAC Adress (internal) : Interface #"
676 << j << " is a NULL address\n";
679 memcpy( addr, varBind[1].value.asnValue.address.stream, 6);
686 SNMP_FreeVarBind(&varBind[0]);
687 SNMP_FreeVarBind(&varBind[1]);
689 #endif //Win32 version
692 // implementation for POSIX system
693 #if defined(CMAKE_HAVE_NET_IF_ARP_H) && defined(__sun)
694 //The POSIX version is broken anyway on Solaris, plus would require full
696 struct arpreq parpreq;
697 struct sockaddr_in *psa;
698 struct hostent *phost;
699 char hostname[MAXHOSTNAMELEN];
703 if (gethostname(hostname, MAXHOSTNAMELEN) != 0 )
705 perror("in Get MAC Adress (internal) : gethostname");
708 phost = gethostbyname(hostname);
709 paddrs = phost->h_addr_list;
711 sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
714 perror("in Get MAC Adress (internal) : sock");
717 memset(&parpreq, 0, sizeof(struct arpreq));
718 psa = (struct sockaddr_in *) &parpreq.arp_pa;
720 memset(psa, 0, sizeof(struct sockaddr_in));
721 psa->sin_family = AF_INET;
722 memcpy(&psa->sin_addr, *paddrs, sizeof(struct in_addr));
724 status = ioctl(sock, SIOCGARP, &parpreq);
727 perror("in Get MAC Adress (internal) : SIOCGARP");
730 memcpy(addr, parpreq.arp_ha.sa_data, 6);
734 #ifdef CMAKE_HAVE_NET_IF_H
736 struct ifreq ifr, *ifrp;
741 #if defined(AF_LINK) && (!defined(SIOCGIFHWADDR) && !defined(SIOCGENADDR))
742 struct sockaddr_dl *sdlp;
746 // BSD 4.4 defines the size of an ifreq to be
747 // max(sizeof(ifreq), sizeof(ifreq.ifr_name)+ifreq.ifr_addr.sa_len
748 // However, under earlier systems, sa_len isn't present, so the size is
749 // just sizeof(struct ifreq)
750 // We should investigate the use of SIZEOF_ADDR_IFREQ
754 #define max(a,b) ((a) > (b) ? (a) : (b))
756 #define ifreq_size(i) max(sizeof(struct ifreq),\
757 sizeof((i).ifr_name)+(i).ifr_addr.sa_len)
759 #define ifreq_size(i) sizeof(struct ifreq)
760 #endif // HAVE_SA_LEN
762 if ( (sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP)) < 0 )
766 memset(buf, 0, sizeof(buf));
767 ifc.ifc_len = sizeof(buf);
769 if (ioctl (sd, SIOCGIFCONF, (char *)&ifc) < 0)
775 for (i = 0; i < n; i+= ifreq_size(*ifrp) )
777 ifrp = (struct ifreq *)((char *) ifc.ifc_buf+i);
778 strncpy(ifr.ifr_name, ifrp->ifr_name, IFNAMSIZ);
780 if (ioctl(sd, SIOCGIFHWADDR, &ifr) < 0)
782 a = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
785 // In theory this call should also work on Sun Solaris, but apparently
786 // SIOCGENADDR is not implemented properly thus the call
787 // ioctl(sd, SIOCGENADDR, &ifr) always returns errno=2
788 // (No such file or directory)
789 // Furthermore the DLAPI seems to require full root access
790 if (ioctl(sd, SIOCGENADDR, &ifr) < 0)
792 a = (unsigned char *) ifr.ifr_enaddr;
795 sdlp = (struct sockaddr_dl *) &ifrp->ifr_addr;
796 if ((sdlp->sdl_family != AF_LINK) || (sdlp->sdl_alen != 6))
798 a = (unsigned char *) &sdlp->sdl_data[sdlp->sdl_nlen];
800 perror("in Get MAC Adress (internal) : No way to access hardware");
804 #endif // SIOCGENADDR
805 #endif // SIOCGIFHWADDR
806 if (!a[0] && !a[1] && !a[2] && !a[3] && !a[4] && !a[5]) continue;
817 // Not implemented platforms (or no cable !)
818 perror("in Get MAC Adress (internal) : There was a configuration problem (or no cable !) on your plateform");
825 * \brief Mini function to return the last digit from a number express in base 256
826 * pre condition data contain an array of 6 unsigned char
827 * post condition carry contain the last digit
829 inline int getlastdigit(unsigned char *data)
831 int extended, carry = 0;
834 extended = (carry << 8) + data[i];
835 data[i] = extended / 10;
836 carry = extended % 10;
842 * \brief Encode the mac address on a fixed length string of 15 characters.
843 * we save space this way.
845 std::string Util::GetMACAddress()
847 // This code is the result of a long internet search to find something
848 // as compact as possible (not OS independant). We only have to separate
849 // 3 OS: Win32, SunOS and 'real' POSIX
850 // http://groups-beta.google.com/group/comp.unix.solaris/msg/ad36929d783d63be
851 // http://bdn.borland.com/article/0,1410,26040,00.html
852 unsigned char addr[6];
854 int stat = GetMacAddrSys(addr);
857 // We need to convert a 6 digit number from base 256 to base 10, using integer
858 // would requires a 48bits one. To avoid this we have to reimplement the div + modulo
865 res = getlastdigit(addr);
866 sres.insert(sres.begin(), '0' + res);
867 zero = (addr[0] == 0) && (addr[1] == 0) && (addr[2] == 0)
868 && (addr[3] == 0) && (addr[4] == 0) && (addr[5] == 0);
875 gdcmStaticWarningMacro("Problem in finding the MAC Address");
881 * \brief Creates a new UID. As stipulated in the DICOM ref
882 * each time a DICOM image is created it should have
883 * a unique identifier (URI)
884 * @param root is the DICOM prefix assigned by IOS group
886 std::string Util::CreateUniqueUID(const std::string &root)
892 // gdcm UID prefix, as supplied by http://www.medicalconnections.co.uk
900 // A root was specified use it to forge our new UID:
902 //append += Util::GetMACAddress(); // to save CPU time
903 append += Util::GDCM_MAC_ADRESS;
905 append += Util::GetCurrentDateTime();
907 //Also add a mini random number just in case:
909 int r = (int) (100.0*rand()/RAND_MAX);
910 // Don't use Util::Format to accelerate the execution
911 sprintf(tmp,"%02d", r);
914 // If append is too long we need to rehash it
915 if ( (prefix + append).size() > 64 )
917 gdcmStaticErrorMacro( "Size of UID is too long." );
918 // we need a hash function to truncate this number
919 // if only md5 was cross plateform
923 return prefix + append;
926 void Util::SetRootUID(const std::string &root)
934 const std::string &Util::GetRootUID()
939 //-------------------------------------------------------------------------
941 * \brief binary_write binary_write
942 * @param os ostream to write to
943 * @param val 16 bits value to write
945 std::ostream &binary_write(std::ostream &os, const uint16_t &val)
947 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
949 swap = ( val << 8 | val >> 8 );
951 return os.write(reinterpret_cast<const char*>(&swap), 2);
953 return os.write(reinterpret_cast<const char*>(&val), 2);
954 #endif //GDCM_WORDS_BIGENDIAN
958 * \brief binary_write binary_write
959 * @param os ostream to write to
960 * @param val 32 bits value to write
962 std::ostream &binary_write(std::ostream &os, const uint32_t &val)
964 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
966 swap = ( (val<<24) | ((val<<8) & 0x00ff0000) |
967 ((val>>8) & 0x0000ff00) | (val>>24) );
968 return os.write(reinterpret_cast<const char*>(&swap), 4);
970 return os.write(reinterpret_cast<const char*>(&val), 4);
971 #endif //GDCM_WORDS_BIGENDIAN
976 * \brief binary_write binary_write
977 * @param os ostream to write to
978 * @param val double (64 bits) value to write
980 std::ostream &binary_write(std::ostream &os, const double &val)
982 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
985 char *beg = (char *)&swap;
988 for (unsigned int i = 0; i<7; i++)
996 return os.write(reinterpret_cast<const char*>(&swap), 8);
998 return os.write(reinterpret_cast<const char*>(&val), 8);
999 #endif //GDCM_WORDS_BIGENDIAN
1004 * \brief binary_write binary_write
1005 * @param os ostream to write to
1006 * @param val 8 bits characters aray to write
1008 std::ostream &binary_write(std::ostream &os, const char *val)
1010 return os.write(val, strlen(val));
1014 * \brief binary_write binary_write
1015 * @param os ostream to write to
1016 * @param val std::string value to write
1018 std::ostream &binary_write(std::ostream &os, std::string const &val)
1020 return os.write(val.c_str(), val.size());
1024 * \brief binary_write binary_write
1025 * @param os ostream to write to
1026 * @param val 8 bits 'characters' aray to write
1027 * @param len length of the 'value' to be written
1029 std::ostream &binary_write(std::ostream &os, const uint8_t *val, size_t len)
1031 // We are writting sizeof(char) thus no need to swap bytes
1032 return os.write(reinterpret_cast<const char*>(val), len);
1036 * \brief binary_write binary_write
1037 * @param os ostream to write to
1038 * @param val 16 bits words aray to write
1039 * @param len length (in bytes) of the 'value' to be written
1041 std::ostream &binary_write(std::ostream &os, const uint16_t *val, size_t len)
1043 // This is tricky since we are writting two bytes buffer.
1044 // Be carefull with little endian vs big endian.
1045 // Also this other trick is to allocate a small (efficient) buffer that store
1046 // intermediate result before writting it.
1047 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
1048 const int BUFFER_SIZE = 4096;
1049 static char buffer[BUFFER_SIZE];
1050 uint16_t *binArea16 = (uint16_t*)val; //for the const
1052 // how many BUFFER_SIZE long pieces in binArea ?
1053 int nbPieces = len/BUFFER_SIZE; //(16 bits = 2 Bytes)
1054 int remainingSize = len%BUFFER_SIZE;
1056 for (int j=0;j<nbPieces;j++)
1058 uint16_t *pbuffer = (uint16_t*)buffer; //reinitialize pbuffer
1059 for (int i = 0; i < BUFFER_SIZE/2; i++)
1061 *pbuffer = *binArea16 >> 8 | *binArea16 << 8;
1065 os.write ( buffer, BUFFER_SIZE );
1067 if ( remainingSize > 0)
1069 uint16_t *pbuffer = (uint16_t*)buffer; //reinitialize pbuffer
1070 for (int i = 0; i < remainingSize/2; i++)
1072 *pbuffer = *binArea16 >> 8 | *binArea16 << 8;
1076 os.write ( buffer, remainingSize );
1080 return os.write(reinterpret_cast<const char*>(val), len);
1084 //-------------------------------------------------------------------------
1087 //-------------------------------------------------------------------------
1090 * \brief Return the IP adress of the machine writting the DICOM image
1092 std::string Util::GetIPAddress()
1094 // This is a rip from
1095 // http://www.codeguru.com/Cpp/I-N/internet/network/article.php/c3445/
1096 #ifndef HOST_NAME_MAX
1097 // SUSv2 guarantees that `Host names are limited to 255 bytes'.
1098 // POSIX 1003.1-2001 guarantees that `Host names (not including the
1099 // terminating NUL) are limited to HOST_NAME_MAX bytes'.
1100 #define HOST_NAME_MAX 255
1101 // In this case we should maybe check the string was not truncated.
1102 // But I don't known how to check that...
1103 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
1104 // with WinSock DLL we need to initialize the WinSock before using gethostname
1105 WORD wVersionRequested = MAKEWORD(1,0);
1107 int err = WSAStartup(wVersionRequested,&WSAData);
1110 // Tell the user that we could not find a usable
1117 #endif //HOST_NAME_MAX
1120 char szHostName[HOST_NAME_MAX+1];
1121 int r = gethostname(szHostName, HOST_NAME_MAX);
1125 // Get host adresses
1126 struct hostent *pHost = gethostbyname(szHostName);
1128 for( int i = 0; pHost!= NULL && pHost->h_addr_list[i]!= NULL; i++ )
1130 for( int j = 0; j<pHost->h_length; j++ )
1132 if ( j > 0 ) str += ".";
1134 str += Util::Format("%u",
1135 (unsigned int)((unsigned char*)pHost->h_addr_list[i])[j]);
1137 // str now contains one local IP address
1139 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
1145 // If an error occur r == -1
1146 // Most of the time it will return 127.0.0.1...
1150 void Util::hfpswap(double *a, double *b)
1158 //-------------------------------------------------------------------------
1159 } // end namespace gdcm