Environment.cpp File Reference

#include "GaudiKernel/Environment.h"
#include <cstdlib>

Include dependency graph for Environment.cpp:

Go to the source code of this file.

Functions
std::string	i_resolve (std::string &source, int recursions)
StatusCode	System::resolveEnv (const std::string &var, std::string &res, int recusions=124)
std::string	System::homeDirectory ()
std::string	System::tempDirectory ()

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Function Documentation

std::string @377::i_resolve	(	std::string &	source,
		int	recursions
	)			[static]

Definition at line 5 of file Environment.cpp.

                                                          {
    if ( recursions > 0 )  {
      int lvl = 0, mx_lvl = 0;
      for(const char* c=source.c_str(), *beg=0; *c != 0; ++c)  {
        switch ( *c )  {
          case '$':
            if ( *(c+1) == '{' )  {
              lvl++;
              if ( lvl > mx_lvl )  {
                mx_lvl = lvl;
                beg = c;
              }
              c += 2;
            }
            break;
          case '}':
            if ( lvl == mx_lvl )  {
              std::string env(beg+2,c-beg-2);
              const char* res = ::getenv(env.c_str());
              std::string rep = (res) ? std::string(res) : i_resolve(env,--recursions);
              if ( rep.length() )  {
                std::string e(beg,c-beg+1);
                size_t idx=std::string::npos;
                while((idx=source.find(e)) != std::string::npos)  {
                  source.replace(idx, e.length(), rep);
                }
                return i_resolve(source, --recursions);
              }
              else  {
                // error: environment cannot be reolved....
                // Try to continue, but there is not too much hope.
              }
            }
            lvl--;
            break;
          default:
            break;
        }
      }
    }
    return source;
  }