443 lines
9.3 KiB
C++
443 lines
9.3 KiB
C++
/*
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WString.cpp - String library for Wiring & Arduino
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Copyright (c) 2009-10 Hernando Barragan. All rights reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include "WProgram.h"
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#include "WString.h"
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String::String( const char *value )
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{
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if ( value == NULL )
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value = "";
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getBuffer( _length = strlen( value ) );
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if ( _buffer != NULL )
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strcpy( _buffer, value );
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}
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String::String( const String &value )
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{
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getBuffer( _length = value._length );
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if ( _buffer != NULL )
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strcpy( _buffer, value._buffer );
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}
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String::String( const char value )
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{
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_length = 1;
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getBuffer(1);
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if ( _buffer != NULL ) {
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_buffer[0] = value;
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_buffer[1] = 0;
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}
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}
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String::String( const unsigned char value )
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{
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_length = 1;
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getBuffer(1);
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if ( _buffer != NULL) {
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_buffer[0] = value;
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_buffer[1] = 0;
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}
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}
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String::String( const int value, const int base )
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{
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char buf[33];
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itoa((signed long)value, buf, base);
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getBuffer( _length = strlen(buf) );
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if ( _buffer != NULL )
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strcpy( _buffer, buf );
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}
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String::String( const unsigned int value, const int base )
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{
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char buf[33];
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ultoa((unsigned long)value, buf, base);
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getBuffer( _length = strlen(buf) );
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if ( _buffer != NULL )
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strcpy( _buffer, buf );
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}
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String::String( const long value, const int base )
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{
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char buf[33];
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ltoa(value, buf, base);
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getBuffer( _length = strlen(buf) );
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if ( _buffer != NULL )
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strcpy( _buffer, buf );
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}
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String::String( const unsigned long value, const int base )
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{
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char buf[33];
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ultoa(value, buf, 10);
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getBuffer( _length = strlen(buf) );
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if ( _buffer != NULL )
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strcpy( _buffer, buf );
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}
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char String::charAt( unsigned int loc ) const
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{
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return operator[]( loc );
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}
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void String::setCharAt( unsigned int loc, const char aChar )
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{
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if(_buffer == NULL) return;
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if(_length > loc) {
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_buffer[loc] = aChar;
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}
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}
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int String::compareTo( const String &s2 ) const
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{
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return strcmp( _buffer, s2._buffer );
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}
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const String & String::concat( const String &s2 )
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{
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return (*this) += s2;
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}
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const String & String::operator=( const String &rhs )
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{
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if ( this == &rhs )
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return *this;
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if ( rhs._length > _length )
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{
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free(_buffer);
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getBuffer( rhs._length );
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}
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if ( _buffer != NULL ) {
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_length = rhs._length;
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strcpy( _buffer, rhs._buffer );
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}
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return *this;
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}
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//const String & String::operator+=( const char aChar )
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//{
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// if ( _length == _capacity )
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// doubleBuffer();
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//
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// _buffer[ _length++ ] = aChar;
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// _buffer[ _length ] = '\0';
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// return *this;
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//}
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const String & String::operator+=( const String &other )
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{
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_length += other._length;
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if ( _length > _capacity )
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{
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char *temp = (char *)realloc(_buffer, _length + 1);
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if ( temp != NULL ) {
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_buffer = temp;
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_capacity = _length;
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} else {
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_length -= other._length;
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return *this;
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}
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}
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strcat( _buffer, other._buffer );
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return *this;
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}
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int String::operator==( const String &rhs ) const
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{
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return ( _length == rhs._length && strcmp( _buffer, rhs._buffer ) == 0 );
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}
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int String::operator!=( const String &rhs ) const
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{
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return ( _length != rhs.length() || strcmp( _buffer, rhs._buffer ) != 0 );
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}
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int String::operator<( const String &rhs ) const
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{
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return strcmp( _buffer, rhs._buffer ) < 0;
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}
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int String::operator>( const String &rhs ) const
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{
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return strcmp( _buffer, rhs._buffer ) > 0;
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}
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int String::operator<=( const String &rhs ) const
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{
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return strcmp( _buffer, rhs._buffer ) <= 0;
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}
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int String::operator>=( const String & rhs ) const
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{
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return strcmp( _buffer, rhs._buffer ) >= 0;
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}
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char & String::operator[]( unsigned int index )
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{
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static char dummy_writable_char;
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if (index >= _length || !_buffer) {
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dummy_writable_char = 0;
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return dummy_writable_char;
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}
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return _buffer[ index ];
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}
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char String::operator[]( unsigned int index ) const
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{
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// need to check for valid index, to do later
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return _buffer[ index ];
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}
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boolean String::endsWith( const String &s2 ) const
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{
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if ( _length < s2._length )
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return 0;
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return strcmp( &_buffer[ _length - s2._length], s2._buffer ) == 0;
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}
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boolean String::equals( const String &s2 ) const
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{
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return ( _length == s2._length && strcmp( _buffer,s2._buffer ) == 0 );
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}
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boolean String::equalsIgnoreCase( const String &s2 ) const
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{
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if ( this == &s2 )
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return true; //1;
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else if ( _length != s2._length )
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return false; //0;
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return strcmp(toLowerCase()._buffer, s2.toLowerCase()._buffer) == 0;
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}
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String String::replace( char findChar, char replaceChar )
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{
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if ( _buffer == NULL ) return *this;
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String theReturn = _buffer;
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char* temp = theReturn._buffer;
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while( (temp = strchr( temp, findChar )) != 0 )
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*temp = replaceChar;
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return theReturn;
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}
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String String::replace( const String& match, const String& replace )
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{
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if ( _buffer == NULL ) return *this;
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String temp = _buffer, newString;
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int loc;
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while ( (loc = temp.indexOf( match )) != -1 )
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{
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newString += temp.substring( 0, loc );
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newString += replace;
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temp = temp.substring( loc + match._length );
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}
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newString += temp;
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return newString;
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}
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int String::indexOf( char temp ) const
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{
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return indexOf( temp, 0 );
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}
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int String::indexOf( char ch, unsigned int fromIndex ) const
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{
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if ( fromIndex >= _length )
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return -1;
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const char* temp = strchr( &_buffer[fromIndex], ch );
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if ( temp == NULL )
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return -1;
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return temp - _buffer;
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}
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int String::indexOf( const String &s2 ) const
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{
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return indexOf( s2, 0 );
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}
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int String::indexOf( const String &s2, unsigned int fromIndex ) const
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{
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if ( fromIndex >= _length )
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return -1;
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const char *theFind = strstr( &_buffer[ fromIndex ], s2._buffer );
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if ( theFind == NULL )
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return -1;
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return theFind - _buffer; // pointer subtraction
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}
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int String::lastIndexOf( char theChar ) const
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{
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return lastIndexOf( theChar, _length - 1 );
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}
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int String::lastIndexOf( char ch, unsigned int fromIndex ) const
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{
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if ( fromIndex >= _length )
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return -1;
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char tempchar = _buffer[fromIndex + 1];
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_buffer[fromIndex + 1] = '\0';
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char* temp = strrchr( _buffer, ch );
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_buffer[fromIndex + 1] = tempchar;
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if ( temp == NULL )
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return -1;
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return temp - _buffer;
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}
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int String::lastIndexOf( const String &s2 ) const
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{
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return lastIndexOf( s2, _length - s2._length );
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}
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int String::lastIndexOf( const String &s2, unsigned int fromIndex ) const
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{
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// check for empty strings
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if ( s2._length == 0 || s2._length - 1 > fromIndex || fromIndex >= _length )
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return -1;
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// matching first character
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char temp = s2[ 0 ];
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for ( int i = fromIndex; i >= 0; i-- )
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{
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if ( _buffer[ i ] == temp && (*this).substring( i, i + s2._length ).equals( s2 ) )
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return i;
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}
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return -1;
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}
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boolean String::startsWith( const String &s2 ) const
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{
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if ( _length < s2._length )
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return 0;
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return startsWith( s2, 0 );
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}
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boolean String::startsWith( const String &s2, unsigned int offset ) const
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{
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if ( offset > _length - s2._length )
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return 0;
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return strncmp( &_buffer[offset], s2._buffer, s2._length ) == 0;
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}
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String String::substring( unsigned int left ) const
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{
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return substring( left, _length );
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}
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String String::substring( unsigned int left, unsigned int right ) const
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{
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if ( left > right )
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{
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int temp = right;
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right = left;
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left = temp;
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}
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if ( right > _length )
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{
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right = _length;
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}
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char temp = _buffer[ right ]; // save the replaced character
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_buffer[ right ] = '\0';
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String outPut = ( _buffer + left ); // pointer arithmetic
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_buffer[ right ] = temp; //restore character
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return outPut;
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}
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String String::toLowerCase() const
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{
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String temp = _buffer;
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for ( unsigned int i = 0; i < _length; i++ )
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temp._buffer[ i ] = (char)tolower( temp._buffer[ i ] );
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return temp;
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}
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String String::toUpperCase() const
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{
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String temp = _buffer;
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for ( unsigned int i = 0; i < _length; i++ )
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temp._buffer[ i ] = (char)toupper( temp._buffer[ i ] );
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return temp;
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}
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String String::trim() const
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{
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if ( _buffer == NULL ) return *this;
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String temp = _buffer;
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unsigned int i,j;
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for ( i = 0; i < _length; i++ )
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{
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if ( !isspace(_buffer[i]) )
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break;
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}
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for ( j = temp._length - 1; j > i; j-- )
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{
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if ( !isspace(_buffer[j]) )
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break;
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}
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return temp.substring( i, j + 1);
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}
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void String::getBytes(unsigned char *buf, unsigned int bufsize)
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{
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if (!bufsize || !buf) return;
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unsigned int len = bufsize - 1;
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if (len > _length) len = _length;
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strncpy((char *)buf, _buffer, len);
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buf[len] = 0;
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}
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void String::toCharArray(char *buf, unsigned int bufsize)
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{
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if (!bufsize || !buf) return;
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unsigned int len = bufsize - 1;
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if (len > _length) len = _length;
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strncpy(buf, _buffer, len);
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buf[len] = 0;
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}
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long String::toInt() {
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return atol(_buffer);
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}
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