1 /*=========================================================================
4 Module: $RCSfile: gdcmUtil.cxx,v $
6 Date: $Date: 2005/10/24 21:31:11 $
7 Version: $Revision: 1.167 $
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 // Two approaches, *NIX or Win32
29 #ifdef CMAKE_HAVE_SYS_TIMEB_H
30 #include <sys/timeb.h>
32 #ifdef CMAKE_HAVE_SYS_TIMES_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[200]; // hope 200 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, ...)
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 //std::cout<< std::endl << i << " : " << (unsigned char)s[i] << std::endl;
201 if (!isprint((unsigned char)s[i]) )
210 * \brief Checks whether an 'area' is printable or not (in order
211 * to avoid corrupting the terminal of invocation when printing)
212 * @param s area to check (uint8_t is just for prototyping. feel free to cast)
213 * @param l area length to check
215 bool Util::IsCleanArea(uint8_t *s, int l)
217 for( int i=0; i<l; i++)
219 if (!isprint((unsigned char)s[i]) )
227 * \brief Weed out a string from the non-printable characters (in order
228 * to avoid corrupting the terminal of invocation when printing)
229 * @param s string to check (uint8_t is just for prototyping. feel free to cast)
231 std::string Util::CreateCleanString(std::string const &s)
235 for(unsigned int i=0; i<str.size(); i++)
237 if (!isprint((unsigned char)str[i]) )
245 if (!isprint((unsigned char)s[str.size()-1]) )
247 if (s[str.size()-1] == 0 )
249 str[str.size()-1] = ' ';
258 * \brief Weed out a string from the non-printable characters (in order
259 * to avoid corrupting the terminal of invocation when printing)
260 * @param s area to process (uint8_t is just for prototyping. feel free to cast)
261 * @param l area length to check
263 std::string Util::CreateCleanString(uint8_t *s, int l)
267 for( int i=0; i<l; i++)
269 if (!isprint((unsigned char)s[i]) )
275 str = str + (char )s[i];
282 * \brief Add a SEPARATOR to the end of the name is necessary
283 * @param pathname file/directory name to normalize
285 std::string Util::NormalizePath(std::string const &pathname)
287 const char SEPARATOR_X = '/';
288 const char SEPARATOR_WIN = '\\';
289 const std::string SEPARATOR = "/";
290 std::string name = pathname;
291 int size = name.size();
293 if ( name[size-1] != SEPARATOR_X && name[size-1] != SEPARATOR_WIN )
301 * \brief Get the (directory) path from a full path file name
302 * @param fullName file/directory name to extract Path from
304 std::string Util::GetPath(std::string const &fullName)
306 std::string res = fullName;
307 int pos1 = res.rfind("/");
308 int pos2 = res.rfind("\\");
322 * \brief Get the (last) name of a full path file name
323 * @param fullName file/directory name to extract end name from
325 std::string Util::GetName(std::string const &fullName)
327 std::string filename = fullName;
329 std::string::size_type slash_pos = filename.rfind("/");
330 std::string::size_type backslash_pos = filename.rfind("\\");
331 slash_pos = slash_pos > backslash_pos ? slash_pos : backslash_pos;
332 if (slash_pos != std::string::npos )
334 return filename.substr(slash_pos + 1);
343 * \brief Get the current date of the system in a dicom string
345 std::string Util::GetCurrentDate()
350 strftime(tmp,512,"%Y%m%d", localtime(&tloc) );
355 * \brief Get the current time of the system in a dicom string
357 std::string Util::GetCurrentTime()
362 strftime(tmp,512,"%H%M%S", localtime(&tloc) );
367 * \brief Get both the date and time at the same time to avoid problem
368 * around midnight where the two calls could be before and after midnight
370 std::string Util::GetCurrentDateTime()
376 // We need implementation specific functions to obtain millisecond precision
377 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
381 milliseconds = tb.millitm;
384 gettimeofday (&tv, NULL);
386 // Compute milliseconds from microseconds.
387 milliseconds = tv.tv_usec / 1000;
389 // Obtain the time of day, and convert it to a tm struct.
390 struct tm *ptm = localtime (&timep);
391 // Format the date and time, down to a single second.
392 strftime (tmp, sizeof (tmp), "%Y%m%d%H%M%S", ptm);
395 // Don't use Util::Format to accelerate execution of code
397 sprintf(tmpAll,"%s%03ld",tmp,milliseconds);
402 unsigned int Util::GetCurrentThreadID()
404 // FIXME the implementation is far from complete
405 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
406 return (unsigned int)GetCurrentThreadId();
410 // Doesn't work on fedora, but is in the man page...
411 //return (unsigned int)gettid();
414 return (unsigned int)thr_self();
416 //default implementation
423 unsigned int Util::GetCurrentProcessID()
425 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
426 // NOTE: There is also a _getpid()...
427 return (unsigned int)GetCurrentProcessId();
429 // get process identification, POSIX
430 return (unsigned int)getpid();
435 * \brief tells us whether the processor we are working with is BigEndian or not
437 bool Util::IsCurrentProcessorBigEndian()
439 #if defined(GDCM_WORDS_BIGENDIAN)
447 * \brief Create a /DICOM/ string:
448 * It should a of even length (no odd length ever)
449 * It can contain as many (if you are reading this from your
450 * editor the following character is backslash followed by zero
451 * that needed to be escaped with an extra backslash for doxygen) \\0
454 std::string Util::DicomString(const char *s, size_t l)
456 std::string r(s, s+l);
457 gdcmAssertMacro( !(r.size() % 2) ); // == basically 'l' is even
462 * \brief Create a /DICOM/ string:
463 * It should a of even length (no odd length ever)
464 * It can contain as many (if you are reading this from your
465 * editor the following character is backslash followed by zero
466 * that needed to be escaped with an extra backslash for doxygen) \\0
468 * This function is similar to DicomString(const char*),
469 * except it doesn't take a length.
470 * It only pad with a null character if length is odd
472 std::string Util::DicomString(const char *s)
474 size_t l = strlen(s);
479 std::string r(s, s+l);
480 gdcmAssertMacro( !(r.size() % 2) );
485 * \brief Safely check the equality of two Dicom String:
486 * - Both strings should be of even length
487 * - We allow padding of even length string by either a null
488 * character of a space
490 bool Util::DicomStringEqual(const std::string &s1, const char *s2)
492 // s2 is the string from the DICOM reference e.g. : 'MONOCHROME1'
493 std::string s1_even = s1; //Never change input parameter
494 std::string s2_even = DicomString( s2 );
495 if ( s1_even[s1_even.size()-1] == ' ' )
497 s1_even[s1_even.size()-1] = '\0'; //replace space character by null
499 return s1_even == s2_even;
503 * \brief Safely compare two Dicom String:
504 * - Both strings should be of even length
505 * - We allow padding of even length string by either a null
506 * character of a space
508 bool Util::CompareDicomString(const std::string &s1, const char *s2, int op)
510 // s2 is the string from the DICOM reference e.g. : 'MONOCHROME1'
511 std::string s1_even = s1; //Never change input parameter
512 std::string s2_even = DicomString( s2 );
513 if ( s1_even[s1_even.size()-1] == ' ' )
515 s1_even[s1_even.size()-1] = '\0'; //replace space character by null
520 return s1_even == s2_even;
521 case GDCM_DIFFERENT :
522 return s1_even != s2_even;
524 return s1_even > s2_even;
525 case GDCM_GREATEROREQUAL :
526 return s1_even >= s2_even;
528 return s1_even < s2_even;
529 case GDCM_LESSOREQUAL :
530 return s1_even <= s2_even;
532 gdcmDebugMacro(" Wrong operator : " << op);
538 typedef BOOL(WINAPI * pSnmpExtensionInit) (
539 IN DWORD dwTimeZeroReference,
540 OUT HANDLE * hPollForTrapEvent,
541 OUT AsnObjectIdentifier * supportedView);
543 typedef BOOL(WINAPI * pSnmpExtensionTrap) (
544 OUT AsnObjectIdentifier * enterprise,
545 OUT AsnInteger * genericTrap,
546 OUT AsnInteger * specificTrap,
547 OUT AsnTimeticks * timeStamp,
548 OUT RFC1157VarBindList * variableBindings);
550 typedef BOOL(WINAPI * pSnmpExtensionQuery) (
552 IN OUT RFC1157VarBindList * variableBindings,
553 OUT AsnInteger * errorStatus,
554 OUT AsnInteger * errorIndex);
556 typedef BOOL(WINAPI * pSnmpExtensionInitEx) (
557 OUT AsnObjectIdentifier * supportedView);
560 /// \brief gets current M.A.C adress (for internal use only)
561 int GetMacAddrSys ( unsigned char *addr );
562 int GetMacAddrSys ( unsigned char *addr )
566 if ( (WSAStartup(MAKEWORD(2, 0), &WinsockData)) != 0 )
568 std::cerr << "in Get MAC Adress (internal) : This program requires Winsock 2.x!"
573 HANDLE PollForTrapEvent;
574 AsnObjectIdentifier SupportedView;
575 UINT OID_ifEntryType[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 3 };
576 UINT OID_ifEntryNum[] = { 1, 3, 6, 1, 2, 1, 2, 1 };
577 UINT OID_ipMACEntAddr[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 6 };
578 AsnObjectIdentifier MIB_ifMACEntAddr = {
579 sizeof(OID_ipMACEntAddr) / sizeof(UINT), OID_ipMACEntAddr };
580 AsnObjectIdentifier MIB_ifEntryType = {
581 sizeof(OID_ifEntryType) / sizeof(UINT), OID_ifEntryType };
582 AsnObjectIdentifier MIB_ifEntryNum = {
583 sizeof(OID_ifEntryNum) / sizeof(UINT), OID_ifEntryNum };
584 RFC1157VarBindList varBindList;
585 RFC1157VarBind varBind[2];
586 AsnInteger errorStatus;
587 AsnInteger errorIndex;
588 AsnObjectIdentifier MIB_NULL = { 0, 0 };
593 // Load the SNMP dll and get the addresses of the functions necessary
594 HINSTANCE m_hInst = LoadLibrary("inetmib1.dll");
595 if (m_hInst < (HINSTANCE) HINSTANCE_ERROR)
599 pSnmpExtensionInit m_Init =
600 (pSnmpExtensionInit) GetProcAddress(m_hInst, "SnmpExtensionInit");
601 pSnmpExtensionQuery m_Query =
602 (pSnmpExtensionQuery) GetProcAddress(m_hInst, "SnmpExtensionQuery");
603 m_Init(GetTickCount(), &PollForTrapEvent, &SupportedView);
605 /* Initialize the variable list to be retrieved by m_Query */
606 varBindList.list = varBind;
607 varBind[0].name = MIB_NULL;
608 varBind[1].name = MIB_NULL;
610 // Copy in the OID to find the number of entries in the
612 varBindList.len = 1; // Only retrieving one item
613 SNMP_oidcpy(&varBind[0].name, &MIB_ifEntryNum);
614 m_Query(ASN_RFC1157_GETNEXTREQUEST, &varBindList, &errorStatus,
616 // printf("# of adapters in this system : %i\n",
617 // varBind[0].value.asnValue.number);
620 // Copy in the OID of ifType, the type of interface
621 SNMP_oidcpy(&varBind[0].name, &MIB_ifEntryType);
623 // Copy in the OID of ifPhysAddress, the address
624 SNMP_oidcpy(&varBind[1].name, &MIB_ifMACEntAddr);
628 // Submit the query. Responses will be loaded into varBindList.
629 // We can expect this call to succeed a # of times corresponding
630 // to the # of adapters reported to be in the system
631 ret = m_Query(ASN_RFC1157_GETNEXTREQUEST, &varBindList, &errorStatus,
639 // Confirm that the proper type has been returned
640 ret = SNMP_oidncmp(&varBind[0].name, &MIB_ifEntryType,
641 MIB_ifEntryType.idLength);
646 dtmp = varBind[0].value.asnValue.number;
648 // Type 6 describes ethernet interfaces
651 // Confirm that we have an address here
652 ret = SNMP_oidncmp(&varBind[1].name, &MIB_ifMACEntAddr,
653 MIB_ifMACEntAddr.idLength);
654 if ( !ret && varBind[1].value.asnValue.address.stream != NULL )
656 if ( (varBind[1].value.asnValue.address.stream[0] == 0x44)
657 && (varBind[1].value.asnValue.address.stream[1] == 0x45)
658 && (varBind[1].value.asnValue.address.stream[2] == 0x53)
659 && (varBind[1].value.asnValue.address.stream[3] == 0x54)
660 && (varBind[1].value.asnValue.address.stream[4] == 0x00) )
662 // Ignore all dial-up networking adapters
663 std::cerr << "in Get MAC Adress (internal) : Interface #"
664 << j << " is a DUN adapter\n";
667 if ( (varBind[1].value.asnValue.address.stream[0] == 0x00)
668 && (varBind[1].value.asnValue.address.stream[1] == 0x00)
669 && (varBind[1].value.asnValue.address.stream[2] == 0x00)
670 && (varBind[1].value.asnValue.address.stream[3] == 0x00)
671 && (varBind[1].value.asnValue.address.stream[4] == 0x00)
672 && (varBind[1].value.asnValue.address.stream[5] == 0x00) )
674 // Ignore NULL addresses returned by other network
676 std::cerr << "in Get MAC Adress (internal) : Interface #"
677 << j << " is a NULL address\n";
680 memcpy( addr, varBind[1].value.asnValue.address.stream, 6);
687 SNMP_FreeVarBind(&varBind[0]);
688 SNMP_FreeVarBind(&varBind[1]);
690 #endif //Win32 version
693 // implementation for POSIX system
694 #if defined(CMAKE_HAVE_NET_IF_ARP_H) && defined(__sun)
695 //The POSIX version is broken anyway on Solaris, plus would require full
697 struct arpreq parpreq;
698 struct sockaddr_in *psa;
699 struct hostent *phost;
700 char hostname[MAXHOSTNAMELEN];
704 if (gethostname(hostname, MAXHOSTNAMELEN) != 0 )
706 perror("in Get MAC Adress (internal) : gethostname");
709 phost = gethostbyname(hostname);
710 paddrs = phost->h_addr_list;
712 sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
715 perror("in Get MAC Adress (internal) : sock");
718 memset(&parpreq, 0, sizeof(struct arpreq));
719 psa = (struct sockaddr_in *) &parpreq.arp_pa;
721 memset(psa, 0, sizeof(struct sockaddr_in));
722 psa->sin_family = AF_INET;
723 memcpy(&psa->sin_addr, *paddrs, sizeof(struct in_addr));
725 status = ioctl(sock, SIOCGARP, &parpreq);
728 perror("in Get MAC Adress (internal) : SIOCGARP");
731 memcpy(addr, parpreq.arp_ha.sa_data, 6);
735 #ifdef CMAKE_HAVE_NET_IF_H
737 struct ifreq ifr, *ifrp;
742 #if defined(AF_LINK) && (!defined(SIOCGIFHWADDR) && !defined(SIOCGENADDR))
743 struct sockaddr_dl *sdlp;
747 // BSD 4.4 defines the size of an ifreq to be
748 // max(sizeof(ifreq), sizeof(ifreq.ifr_name)+ifreq.ifr_addr.sa_len
749 // However, under earlier systems, sa_len isn't present, so the size is
750 // just sizeof(struct ifreq)
751 // We should investigate the use of SIZEOF_ADDR_IFREQ
755 #define max(a,b) ((a) > (b) ? (a) : (b))
757 #define ifreq_size(i) max(sizeof(struct ifreq),\
758 sizeof((i).ifr_name)+(i).ifr_addr.sa_len)
760 #define ifreq_size(i) sizeof(struct ifreq)
761 #endif // HAVE_SA_LEN
763 if ( (sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP)) < 0 )
767 memset(buf, 0, sizeof(buf));
768 ifc.ifc_len = sizeof(buf);
770 if (ioctl (sd, SIOCGIFCONF, (char *)&ifc) < 0)
776 for (i = 0; i < n; i+= ifreq_size(*ifrp) )
778 ifrp = (struct ifreq *)((char *) ifc.ifc_buf+i);
779 strncpy(ifr.ifr_name, ifrp->ifr_name, IFNAMSIZ);
781 if (ioctl(sd, SIOCGIFHWADDR, &ifr) < 0)
783 a = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
786 // In theory this call should also work on Sun Solaris, but apparently
787 // SIOCGENADDR is not implemented properly thus the call
788 // ioctl(sd, SIOCGENADDR, &ifr) always returns errno=2
789 // (No such file or directory)
790 // Furthermore the DLAPI seems to require full root access
791 if (ioctl(sd, SIOCGENADDR, &ifr) < 0)
793 a = (unsigned char *) ifr.ifr_enaddr;
796 sdlp = (struct sockaddr_dl *) &ifrp->ifr_addr;
797 if ((sdlp->sdl_family != AF_LINK) || (sdlp->sdl_alen != 6))
799 a = (unsigned char *) &sdlp->sdl_data[sdlp->sdl_nlen];
801 perror("in Get MAC Adress (internal) : No way to access hardware");
805 #endif // SIOCGENADDR
806 #endif // SIOCGIFHWADDR
807 if (!a[0] && !a[1] && !a[2] && !a[3] && !a[4] && !a[5]) continue;
818 // Not implemented platforms
819 perror("in Get MAC Adress (internal) : There was a configuration problem on your plateform");
826 * \brief Mini function to return the last digit from a number express in base 256
827 * pre condition data contain an array of 6 unsigned char
828 * post condition carry contain the last digit
830 inline int getlastdigit(unsigned char *data)
832 int extended, carry = 0;
835 extended = (carry << 8) + data[i];
836 data[i] = extended / 10;
837 carry = extended % 10;
843 * \brief Encode the mac address on a fixed lenght string of 15 characters.
844 * we save space this way.
846 std::string Util::GetMACAddress()
848 // This code is the result of a long internet search to find something
849 // as compact as possible (not OS independant). We only have to separate
850 // 3 OS: Win32, SunOS and 'real' POSIX
851 // http://groups-beta.google.com/group/comp.unix.solaris/msg/ad36929d783d63be
852 // http://bdn.borland.com/article/0,1410,26040,00.html
853 unsigned char addr[6];
855 int stat = GetMacAddrSys(addr);
858 // We need to convert a 6 digit number from base 256 to base 10, using integer
859 // would requires a 48bits one. To avoid this we have to reimplement the div + modulo
866 res = getlastdigit(addr);
867 sres.insert(sres.begin(), '0' + res);
868 zero = (addr[0] == 0) && (addr[1] == 0) && (addr[2] == 0)
869 && (addr[3] == 0) && (addr[4] == 0) && (addr[5] == 0);
876 gdcmWarningMacro("Problem in finding the MAC Address");
882 * \brief Creates a new UID. As stipulate in the DICOM ref
883 * each time a DICOM image is create it should have
884 * a unique identifier (URI)
885 * @param root is the DICOM prefix assigned by IOS group
887 std::string Util::CreateUniqueUID(const std::string &root)
893 // gdcm UID prefix, as supplied by http://www.medicalconnections.co.uk
901 // A root was specified use it to forge our new UID:
903 //append += Util::GetMACAddress(); // to save CPU time
904 append += Util::GDCM_MAC_ADRESS;
906 append += Util::GetCurrentDateTime();
908 //Also add a mini random number just in case:
910 int r = (int) (100.0*rand()/RAND_MAX);
911 // Don't use Util::Format to accelerate the execution
912 sprintf(tmp,"%02d", r);
915 // If append is too long we need to rehash it
916 if ( (prefix + append).size() > 64 )
918 gdcmErrorMacro( "Size of UID is too long." );
919 // we need a hash function to truncate this number
920 // if only md5 was cross plateform
924 return prefix + append;
927 void Util::SetRootUID(const std::string &root)
935 const std::string &Util::GetRootUID()
940 //-------------------------------------------------------------------------
942 * \brief binary_write binary_write
943 * @param os ostream to write to
946 std::ostream &binary_write(std::ostream &os, const uint16_t &val)
948 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
950 swap = ( val << 8 | val >> 8 );
952 return os.write(reinterpret_cast<const char*>(&swap), 2);
954 return os.write(reinterpret_cast<const char*>(&val), 2);
955 #endif //GDCM_WORDS_BIGENDIAN
959 * \brief binary_write binary_write
960 * @param os ostream to write to
963 std::ostream &binary_write(std::ostream &os, const uint32_t &val)
965 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
967 swap = ( (val<<24) | ((val<<8) & 0x00ff0000) |
968 ((val>>8) & 0x0000ff00) | (val>>24) );
969 return os.write(reinterpret_cast<const char*>(&swap), 4);
971 return os.write(reinterpret_cast<const char*>(&val), 4);
972 #endif //GDCM_WORDS_BIGENDIAN
976 * \brief binary_write binary_write
977 * @param os ostream to write to
980 std::ostream &binary_write(std::ostream &os, const char *val)
982 return os.write(val, strlen(val));
987 * @param os ostream to write to
990 std::ostream &binary_write(std::ostream &os, std::string const &val)
992 return os.write(val.c_str(), val.size());
996 * \brief binary_write binary_write
997 * @param os ostream to write to
999 * @param len length of the 'value' to be written
1001 std::ostream &binary_write(std::ostream &os, const uint8_t *val, size_t len)
1003 // We are writting sizeof(char) thus no need to swap bytes
1004 return os.write(reinterpret_cast<const char*>(val), len);
1008 * \brief binary_write binary_write
1009 * @param os ostream to write to
1011 * @param len length of the 'value' to be written
1013 std::ostream &binary_write(std::ostream &os, const uint16_t *val, size_t len)
1015 // This is tricky since we are writting two bytes buffer.
1016 // Be carefull with little endian vs big endian.
1017 // Also this other trick is to allocate a small (efficient) buffer that store
1018 // intermediate result before writting it.
1019 #if defined(GDCM_WORDS_BIGENDIAN) || defined(GDCM_FORCE_BIGENDIAN_EMULATION)
1020 const int BUFFER_SIZE = 4096;
1021 static char buffer[BUFFER_SIZE];
1022 uint16_t *binArea16 = (uint16_t*)val; //for the const
1024 // how many BUFFER_SIZE long pieces in binArea ?
1025 int nbPieces = len/BUFFER_SIZE; //(16 bits = 2 Bytes)
1026 int remainingSize = len%BUFFER_SIZE;
1028 for (int j=0;j<nbPieces;j++)
1030 uint16_t *pbuffer = (uint16_t*)buffer; //reinitialize pbuffer
1031 for (int i = 0; i < BUFFER_SIZE/2; i++)
1033 *pbuffer = *binArea16 >> 8 | *binArea16 << 8;
1037 os.write ( buffer, BUFFER_SIZE );
1039 if ( remainingSize > 0)
1041 uint16_t *pbuffer = (uint16_t*)buffer; //reinitialize pbuffer
1042 for (int i = 0; i < remainingSize/2; i++)
1044 *pbuffer = *binArea16 >> 8 | *binArea16 << 8;
1048 os.write ( buffer, remainingSize );
1052 return os.write(reinterpret_cast<const char*>(val), len);
1056 //-------------------------------------------------------------------------
1059 //-------------------------------------------------------------------------
1062 * \brief Return the IP adress of the machine writting the DICOM image
1064 std::string Util::GetIPAddress()
1066 // This is a rip from
1067 // http://www.codeguru.com/Cpp/I-N/internet/network/article.php/c3445/
1068 #ifndef HOST_NAME_MAX
1069 // SUSv2 guarantees that `Host names are limited to 255 bytes'.
1070 // POSIX 1003.1-2001 guarantees that `Host names (not including the
1071 // terminating NUL) are limited to HOST_NAME_MAX bytes'.
1072 #define HOST_NAME_MAX 255
1073 // In this case we should maybe check the string was not truncated.
1074 // But I don't known how to check that...
1075 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
1076 // with WinSock DLL we need to initialize the WinSock before using gethostname
1077 WORD wVersionRequested = MAKEWORD(1,0);
1079 int err = WSAStartup(wVersionRequested,&WSAData);
1082 // Tell the user that we could not find a usable
1089 #endif //HOST_NAME_MAX
1092 char szHostName[HOST_NAME_MAX+1];
1093 int r = gethostname(szHostName, HOST_NAME_MAX);
1097 // Get host adresses
1098 struct hostent *pHost = gethostbyname(szHostName);
1100 for( int i = 0; pHost!= NULL && pHost->h_addr_list[i]!= NULL; i++ )
1102 for( int j = 0; j<pHost->h_length; j++ )
1104 if ( j > 0 ) str += ".";
1106 str += Util::Format("%u",
1107 (unsigned int)((unsigned char*)pHost->h_addr_list[i])[j]);
1109 // str now contains one local IP address
1111 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__)
1117 // If an error occur r == -1
1118 // Most of the time it will return 127.0.0.1...
1122 //-------------------------------------------------------------------------
1123 } // end namespace gdcm