X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2FgdcmUtil.cxx;h=b551067fad83ba2b2d15d34b399955c074554e6b;hb=a0091d68a2eaa1a0c128f962030bb6c45cc0c366;hp=0b1b14a831a1ca9e0c38b61571afe26ebb834284;hpb=f5575c1671810f3eeecae9967861dff3f1f75f05;p=gdcm.git

diff --git a/src/gdcmUtil.cxx b/src/gdcmUtil.cxx
index 0b1b14a8..b551067f 100644
--- a/src/gdcmUtil.cxx
+++ b/src/gdcmUtil.cxx
@@ -3,8 +3,8 @@
   Program:   gdcm
   Module:    $RCSfile: gdcmUtil.cxx,v $
   Language:  C++
-  Date:      $Date: 2004/10/08 04:43:38 $
-  Version:   $Revision: 1.51 $
+  Date:      $Date: 2004/11/16 02:54:35 $
+  Version:   $Revision: 1.64 $
                                                                                 
   Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
   l'Image). All rights reserved. See Doc/License.txt or
@@ -19,13 +19,54 @@
 #include "gdcmUtil.h"
 #include "gdcmDebug.h"
 
+// For GetCurrentDate, GetCurrentTime
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <stdarg.h>  //only included in implementation file
+#include <stdio.h>   //only included in implementation file
+
+#include <unistd.h>  // for gethostname
+#include <netdb.h>   // for gethostbyname
+
+namespace gdcm 
+{
+
+/**
+ * \ingroup Globals
+ * \brief Provide a better 'c++' approach for sprintf
+ * For example c code is:
+ * sprintf(trash, "%04x|%04x", group , element);
+ *
+ * c++ 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 <<  element;
+ * buf.str();
+ */
+
+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;
+}
+
+
 /**
  * \ingroup Globals
  * \brief Because not available in C++ (?)
  */
-void Tokenize (const std::string& str,
-               std::vector<std::string>& tokens,
-               const std::string& delimiters)
+void Util::Tokenize (const std::string& str,
+                     std::vector<std::string>& 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);
@@ -43,8 +84,8 @@ void Tokenize (const std::string& str,
  *        Counts the number of occurences of a substring within a string
  */
  
-int CountSubstring (const std::string& str,
-                    const std::string& subStr)
+int Util::CountSubstring (const std::string& str,
+                          const std::string& subStr)
 {
    int count = 0;   // counts how many times it appears
    unsigned int x = 0;       // The index position in the string
@@ -69,7 +110,7 @@ int CountSubstring (const std::string& str,
  *         to avoid corrupting the terminal of invocation when printing)
  * @param s string to remove non printable characters from
  */
-std::string CreateCleanString(std::string s)
+std::string Util::CreateCleanString(std::string const & s)
 {
    std::string str = s;
 
@@ -100,17 +141,19 @@ std::string CreateCleanString(std::string s)
  * \brief   Add a SEPARATOR to the end of the name is necessary
  * @param name file/directory name to normalize 
  */
-void NormalizePath(std::string &name)
+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))
+   if( name[size-1] != SEPARATOR_X && name[size-1] != SEPARATOR_WIN )
    {
-      name+=SEPARATOR;
+      name += SEPARATOR;
    }
+   return name;
 }
 
 /**
@@ -118,50 +161,235 @@ void NormalizePath(std::string &name)
  * \brief   Get the (directory) path from a full path file name
  * @param   fullName file/directory name to extract Path from
  */
-std::string GetPath(std::string &fullName)
+std::string Util::GetPath(std::string const & fullName)
 {
-   int pos1 = fullName.rfind("/");
-   int pos2 = fullName.rfind("\\");
+   std::string res = fullName;
+   int pos1 = res.rfind("/");
+   int pos2 = res.rfind("\\");
    if( pos1 > pos2)
    {
-      fullName.resize(pos1);
+      res.resize(pos1);
    }
    else
    {
-      fullName.resize(pos2);
+      res.resize(pos2);
    }
 
-   return fullName;
+   return res;
 }
 
 /**
- * \ingroup Globals
+ * \ingroup Util
  * \brief   Get the (last) name of a full path file name
  * @param   fullName file/directory name to extract end name from
  */
-std::string GetName(std::string &fullName)
+std::string Util::GetName(std::string const & fullName)
 {   
-   int fin = fullName.length()-1;
-   char a =fullName.c_str()[fin];
-   if (a == '/' || a == '\\')
+  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;
+    }
+} 
+
+/**
+ * \ingroup Util
+ * \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;
+}
+
+/**
+ * \ingroup Util
+ * \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;  
+}
+
+/**
+ * \ingroup Util
+ * \brief Create a /DICOM/ string:
+ * It should a of even length (no odd length ever)
+ * It can contains as many \0 as you want.
+ */
+std::string Util::DicomString(const char* s, size_t l)
+{
+   std::string r(s, s+l);
+   assert( !(r.size() % 2) ); // == basically 'l' is even
+   return r;
+}
+
+/**
+ * \ingroup Util
+ * \brief Create a /DICOM/ string:
+ * It should a of even lenght (no odd length ever)
+ * It can contains as many \0 as you want.
+ * This function is similar to DicomString(const char*), 
+ * except it doesn't take a lenght. 
+ * 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 )
    {
-      fin--;
+      l++;
    }
-   int deb = 0;
-   for (int i=fin;i!=0;i--)
-   {
-      if (fullName.c_str()[i] == '/' || fullName.c_str()[i] == '\\')
+   std::string r(s, s+l);
+   assert( !(r.size() % 2) );
+   return r;
+}
+
+/**
+ * \ingroup Util
+ * \brief Safely compare two Dicom String:
+ *        - Both string should be of even lenght
+ *        - We allow padding of even lenght 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;
+}
+
+/**
+ * \ingroup Util
+ * \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...
+#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; j<pHost->h_length; j++ )
       {
-         break;
+        if( j > 0 ) str += ".";
+
+        str += Util::Format("%u", 
+            (unsigned int)((unsigned char*)pHost->h_addr_list[i])[j]);
       }
-      deb = i;
-   }
+      // str now contains one local IP address 
+    }
+  }
+  // If an error occur r == -1
+  // Most of the time it will return 127.0.0.1...
+  return str;
+}
 
-   std::string lastName;
-   for (int j=deb;j<fin+1;j++)
-   {
-      lastName=lastName+fullName.c_str()[j];
-   }
+/**
+ * \ingroup Util
+ * \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)
+ */
+std::string Util::CreateUniqueUID(const std::string& root)
+{
+  // The code works as follow:
+  // echo "gdcm" | od -b
+  // 0000000 147 144 143 155 012
+  // Therefore we return
+  // radical + 147.144.143.155 + IP + time()
+  std::string radical = root;
+  if( !root.size() ) //anything better ?
+  {
+    radical = "0.0."; // Is this really usefull ?
+  }
+  // else
+  // A root was specified use it to forge our new UID:
+  radical += "147.144.143.155"; // gdcm
+  radical += ".";
+  radical += Util::GetIPAddress();
+  radical += ".";
+  radical += Util::GetCurrentDate();
+  radical += ".";
+  radical += Util::GetCurrentTime();
+
+  return radical;
+}
+
+template <class T>
+std::ostream& binary_write(std::ostream& os, const T& val)
+{
+    return os.write(reinterpret_cast<const char*>(&val), sizeof val);
+}
+
+std::ostream& binary_write(std::ostream& os, const uint16_t& val)
+{
+#ifdef GDCM_WORDS_BIGENDIAN
+    uint16_t swap;
+    swap = ((( val << 8 ) & 0x0ff00 ) | (( val >> 8 ) & 0x00ff ) );
+    return os.write(reinterpret_cast<const char*>(&swap), 2);
+#else
+    return os.write(reinterpret_cast<const char*>(&val), 2);
+#endif //GDCM_WORDS_BIGENDIAN
+}
+
+std::ostream& binary_write(std::ostream& os, const uint32_t& val)
+{
+#ifdef GDCM_WORDS_BIGENDIAN
+    uint32_t swap;
+    swap = ( ((val<<24) & 0xff000000) | ((val<<8)  & 0x00ff0000) | 
+             ((val>>8)  & 0x0000ff00) | ((val>>24) & 0x000000ff) );
+    return os.write(reinterpret_cast<const char*>(&swap), 4);
+#else
+    return os.write(reinterpret_cast<const char*>(&val), 4);
+#endif //GDCM_WORDS_BIGENDIAN
+}
+
+std::ostream& binary_write(std::ostream& os, const char* val)
+{
+    return os.write(val, strlen(val));
+}
+
+std::ostream& binary_write(std::ostream& os, std::string const & val)
+{
+    return os.write(val.c_str(), val.size());
+}
+
+} // end namespace gdcm
 
-  return lastName;
-}