muele-marlin/Marlin/Boards/cores/arduino/WString.cpp
2012-09-10 14:25:49 +02:00

444 lines
9.3 KiB
C++

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