Strings and Things - Java - page 102

* entab: process one file, replacing blanks with tabs.
*
* @param is A BufferedReader opened to the file to be read.
* @param out a PrintWriter to send the output to.
*/
public public void void entab ( BufferedReader is , PrintWriter out ) throws throws IOException {

String line ;

// main loop: process entire file one line at a time.
while

while (( line = is . readLine ()) != null null ) {

out . println ( entabLine ( line ));

}

}
/**
* entab: process one file, replacing blanks with tabs.
*
* @param is A BufferedReader opened to the file to be read.
* @param out A PrintStream to write the output to.
*/
public public void void entab ( BufferedReader is , PrintStream out ) throws throws IOException {

entab ( is , new new PrintWriter ( out ));

}

/**
* entabLine: process one line, replacing blanks with tabs.
*
* @param line -
* the string to be processed
*/
public public String entabLine ( String line ) {

int int N = line . length (), outCol = 0 ;

StringBuffer sb = new

new StringBuffer ();

char char ch ;

int

int consumedSpaces = 0 ;

for for ( int int inCol = 0 ; inCol < N ; inCol ++) {

ch = line . charAt ( inCol );
// If we get a space, consume it, don't output it.
// If this takes us to a tab stop, output a tab character.
iif ( ch == ' ' ) {
Debug . println ( "space" , "Got space at " + inCol );
iif (! tabs . isTabStop ( inCol )) {
consumedSpaces ++;
} else

else {
Debug . println ( "tab" , "Got a Tab Stop " + inCol );
sb . append ( '\t' );