// String utilities.
//
-// Written by Bernie Bright, 1998
+// Written by Bernie Bright, started 1998
//
-// Copyright (C) 1998 Bernie Bright - bbright@c031.aone.net.au
+// Copyright (C) 1998 Bernie Bright - bbright@bigpond.net.au
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
-// You should have received a copy of the GNU Library General Public
-// License along with this library; if not, write to the
-// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-// Boston, MA 02111-1307, USA.
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <ctype.h>
+#include <cstring>
+#include <sstream>
#include "strutils.hxx"
-const string whitespace = " \n\r\t";
+using std::string;
+using std::vector;
+using std::stringstream;
-//
-string
-trimleft( const string& s, const string& trimmings )
-{
- string result;
- string::size_type pos = s.find_first_not_of( trimmings );
- if ( pos != string::npos )
- {
- result.assign( s.substr( pos ) );
- }
+namespace simgear {
+ namespace strutils {
- return result;
-}
+ /**
+ *
+ */
+ static vector<string>
+ split_whitespace( const string& str, int maxsplit )
+ {
+ vector<string> result;
+ string::size_type len = str.length();
+ string::size_type i = 0;
+ string::size_type j;
+ int countsplit = 0;
-//
-string
-trimright( const string& s, const string& trimmings )
-{
- string result;
+ while (i < len)
+ {
+ while (i < len && isspace((unsigned char)str[i]))
+ {
+ ++i;
+ }
+
+ j = i;
+
+ while (i < len && !isspace((unsigned char)str[i]))
+ {
+ ++i;
+ }
+
+ if (j < i)
+ {
+ result.push_back( str.substr(j, i-j) );
+ ++countsplit;
+ while (i < len && isspace((unsigned char)str[i]))
+ {
+ ++i;
+ }
+
+ if (maxsplit && (countsplit >= maxsplit) && i < len)
+ {
+ result.push_back( str.substr( i, len-i ) );
+ i = len;
+ }
+ }
+ }
+
+ return result;
+ }
+
+ /**
+ *
+ */
+ vector<string>
+ split( const string& str, const char* sep, int maxsplit )
+ {
+ if (sep == 0)
+ return split_whitespace( str, maxsplit );
+
+ vector<string> result;
+ int n = std::strlen( sep );
+ if (n == 0)
+ {
+ // Error: empty separator string
+ return result;
+ }
+ const char* s = str.c_str();
+ string::size_type len = str.length();
+ string::size_type i = 0;
+ string::size_type j = 0;
+ int splitcount = 0;
+
+ while (i+n <= len)
+ {
+ if (s[i] == sep[0] && (n == 1 || std::memcmp(s+i, sep, n) == 0))
+ {
+ result.push_back( str.substr(j,i-j) );
+ i = j = i + n;
+ ++splitcount;
+ if (maxsplit && (splitcount >= maxsplit))
+ break;
+ }
+ else
+ {
+ ++i;
+ }
+ }
+
+ result.push_back( str.substr(j,len-j) );
+ return result;
+ }
+
+ /**
+ * The lstrip(), rstrip() and strip() functions are implemented
+ * in do_strip() which uses an additional parameter to indicate what
+ * type of strip should occur.
+ */
+ const int LEFTSTRIP = 0;
+ const int RIGHTSTRIP = 1;
+ const int BOTHSTRIP = 2;
- string::size_type pos = s.find_last_not_of( trimmings );
- if ( pos == string::npos )
+ static string
+ do_strip( const string& s, int striptype )
+ {
+ string::size_type len = s.length();
+ if( len == 0 ) // empty string is trivial
+ return s;
+ string::size_type i = 0;
+ if (striptype != RIGHTSTRIP)
+ {
+ while (i < len && isspace(s[i]))
+ {
+ ++i;
+ }
+ }
+
+ string::size_type j = len;
+ if (striptype != LEFTSTRIP)
+ {
+ do
+ {
+ --j;
+ }
+ while (j >= 1 && isspace(s[j]));
+ ++j;
+ }
+
+ if (i == 0 && j == len)
+ {
+ return s;
+ }
+ else
+ {
+ return s.substr( i, j - i );
+ }
+ }
+
+ string
+ lstrip( const string& s )
+ {
+ return do_strip( s, LEFTSTRIP );
+ }
+
+ string
+ rstrip( const string& s )
+ {
+ return do_strip( s, RIGHTSTRIP );
+ }
+
+ string
+ strip( const string& s )
+ {
+ return do_strip( s, BOTHSTRIP );
+ }
+
+ string
+ rpad( const string & s, string::size_type length, char c )
+ {
+ string::size_type l = s.length();
+ if( l >= length ) return s;
+ string reply = s;
+ return reply.append( length-l, c );
+ }
+
+ string
+ lpad( const string & s, size_t length, char c )
+ {
+ string::size_type l = s.length();
+ if( l >= length ) return s;
+ string reply = s;
+ return reply.insert( 0, length-l, c );
+ }
+
+ bool
+ starts_with( const string & s, const string & substr )
+ {
+ return s.find( substr ) == 0;
+ }
+
+ bool
+ ends_with( const string & s, const string & substr )
+ {
+ size_t n = s.rfind( substr );
+ return (n != string::npos) && (n == s.length() - substr.length());
+ }
+
+ string simplify(const string& s)
{
- // Not found, return the original string.
- result = s;
+ string result; // reserve size of 's'?
+ string::const_iterator it = s.begin(),
+ end = s.end();
+
+ // advance to first non-space char - simplifes logic in main loop,
+ // since we can always prepend a single space when we see a
+ // space -> non-space transition
+ for (; (it != end) && isspace(*it); ++it) { /* nothing */ }
+
+ bool lastWasSpace = false;
+ for (; it != end; ++it) {
+ char c = *it;
+ if (isspace(c)) {
+ lastWasSpace = true;
+ continue;
+ }
+
+ if (lastWasSpace) {
+ result.push_back(' ');
+ }
+
+ lastWasSpace = false;
+ result.push_back(c);
+ }
+
+ return result;
}
- else
+
+ int to_int(const std::string& s, int base)
{
- result.assign( s.substr( 0, pos+1 ) );
+ stringstream ss(s);
+ switch (base) {
+ case 8: ss >> std::oct; break;
+ case 16: ss >> std::hex; break;
+ default: break;
+ }
+
+ int result;
+ ss >> result;
+ return result;
}
-
- return result;
-}
-
-//
-string
-trim( const string& s, const string& trimmings )
-{
- return trimright( trimleft( s, trimmings ), trimmings );
-}
-
+
+ } // end namespace strutils
+
+} // end namespace simgear
projects / simgear.git / blobdiff