Imported Upstream version 14.46.0

[platform/upstream/libzypp.git] / zypp / base / String.cc

diff --git a/zypp/base/String.cc b/zypp/base/String.cc
index fb7bd35..47ef8b1 100644 (file)
--- a/zypp/base/String.cc
+++ b/zypp/base/String.cc
@@ -373,6 +373,91 @@ namespace zypp
       return std::string( buf.begin(), buf.end() );
     }
 
+
+    std::string bEscape( std::string str_r, const C_Str & special_r )
+    {
+      if ( str_r.empty() )
+       return str_r;
+
+      if ( str_r.find_first_of( special_r ) == std::string::npos
+       && ( ::strchr( special_r.c_str(), '\\' ) ||  !::strchr( str_r.c_str(), '\\' ) ) )
+       return str_r;
+
+      Str buf;
+      for_( s, str_r.c_str(), s+str_r.size() )
+      {
+       if ( *s == '\\' || ::strchr( special_r.c_str(), *s ) )
+         buf << '\\';
+       buf << *s;
+      }
+      return buf;
+    }
+
+    #define RXSPECIALCHARS "\\.*+?^$[()|{"
+
+    std::string rxEscapeStr( std::string str_r )
+    {
+      return bEscape( std::move(str_r), RXSPECIALCHARS );
+    }
+
+    std::string rxEscapeGlob( std::string str_r )
+    {
+      if ( str_r.empty() )
+       return str_r;
+
+      if ( str_r.find_first_of( RXSPECIALCHARS ) == std::string::npos )
+       return str_r;
+
+      Str buf;
+      for_( s, str_r.c_str(), s+str_r.size() )
+      {
+       if ( *s == '\\' )       // + next char literally
+       {
+         buf << '\\';
+         if ( *(s+1) ) { ++s; buf << *s; }
+       }
+       else if ( *s == '?' )   // translate
+       {
+         buf << '.';
+       }
+       else if ( *s == '*' )   // translate
+       {
+         buf << ".*";
+       }
+       else if ( *s == '[' )   // character class if closing ] is found, else literally
+       {
+         const char * e = s+1;
+         if ( *e == '^' || *e == '!' ) // negated cclass
+           ++e;
+         if ( *e == ']' )              // ] in cclass
+           ++e;
+         while ( *e && *e != ']' )     // ...to ] or \0
+           ++e;
+         if ( *e ) // on closing ']'
+         {
+           ++s;  buf << '[' << (*s == '!' ? '^' : *s );
+           while ( ++s != e )
+             buf << *s;
+           buf << ']';
+         }
+         else
+         {
+           buf << "\\[";
+         }
+       }
+       else if ( ::strchr( RXSPECIALCHARS, *s ) )      // escape
+       {
+         buf << '\\' << *s;
+       }
+       else
+       {
+         buf << *s;
+       }
+      }
+      return buf;
+    }
+
+
     std::string getline( std::istream & str, const Trim trim_r )
     {
       return trim( receiveUpTo( str, '\n' ), trim_r );