Keith Winstein
49 lines
1002 B
C++
49 lines
1002 B
C++
#include <assert.h>
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#include "keystroke.hpp"
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void KeyStroke::subtract( KeyStroke * const prefix )
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{
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for ( deque<char>::iterator i = prefix->user_bytes.begin();
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i != prefix->user_bytes.end();
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i++ ) {
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assert( *i == user_bytes.front() );
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user_bytes.pop_front();
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}
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}
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string KeyStroke::diff_from( KeyStroke const & existing )
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{
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string ret;
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deque<char>::iterator my_it = user_bytes.begin();
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for ( deque<char>::const_iterator i = existing.user_bytes.begin();
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i != existing.user_bytes.end();
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i++ ) {
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assert( my_it != user_bytes.end() );
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if ( *i != *my_it ) {
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fprintf( stderr, "BUG: existing state has %c and new state has %c\n",
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*i, *my_it );
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}
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assert( *i == *my_it );
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my_it++;
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}
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while ( my_it != user_bytes.end() ) {
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ret += string( &( *my_it ), 1 );
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my_it++;
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}
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return ret;
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}
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void KeyStroke::apply_string( string diff )
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{
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for ( string::iterator i = diff.begin();
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i != diff.end();
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i++ ) {
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user_bytes.push_back( *i );
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}
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}
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