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StringUtils.cpp

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#include <string>
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h> 

using namespace std;

// characters which are special to the shell
static const char g_shell_chars[] = {'\'','"', '>', '<',
                                                 '[', ']', '(', ')', 
                                                 '\\', '/','~', '!', 
                                                 '#', '$', '&', '|',
                                                 ';', ' ', '\0' };



void replace_str(string& to_change, const string& to_find, const string& replace_with)
{
  size_t pos(0);
  
  while((pos = to_change.find(to_find, pos)) != string::npos) {
     to_change.replace(pos, to_find.length(), replace_with);
     pos += replace_with.length();
  }
}



void remove_shell_chars(string& to_change)
{
  int i(0);
  size_t pos;
  
  while(g_shell_chars[i] != 0) {
     pos = 0;
     while((pos = to_change.find(g_shell_chars[i], pos)) != string::npos) {
        to_change.erase(pos, 1);
     }  
     ++i;
  }
}


void escape_shell_chars(string& to_change)
{
  int i(0);
  size_t pos;
  
  while(g_shell_chars[i] != 0) {
     pos = 0;
     while((pos = to_change.find(g_shell_chars[i], pos)) != string::npos) {
        to_change.insert(pos, 1, '\\');
        pos += 2;
     }
     ++i;
  }  
}


void expand_tilde(string& tochange) {

  if ((! tochange.empty()) && (tochange[0] == '~')) {   
     if ((tochange.length() == 1) || (tochange[1] == '/')) {
        char *tmp = getenv("HOME");
        string home = (tmp ? tmp :  "/");
        tochange.replace(0, 1, home);
     }
  }
}



bool make_dir(const std::string& dir)
{
  int rc;
  
  if (dir.length() < 2) {
     return mkdir(dir.c_str(), 0777);
  } else {
     bool cont(true);
     int pos = dir.find('/', 0);
     while (cont && (pos != string::npos)) {
        cont = (((rc = mkdir(dir.substr(0, pos).c_str(), 0777)) == 0) || (errno == EEXIST));
        pos = dir.find('/', pos+1);
        
     }
     rc = mkdir(dir.c_str(), 0777);
  }

  return ((rc == 0) || (errno == EEXIST));
}

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