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Annotation of 43BSD/contrib/X/doc/Xlib/block.icn, revision 1.1.1.1

1.1       root        1: #
                      2: #   Seperate index entries where the first letter of the entry
                      3: #      changes.  Produce a ".LB" at the break point.  Provide
                      4: #      the macro with the new letter
                      5: #      
                      6: 
                      7: procedure main()
                      8:        local doubleQuote,
                      9:              line,
                     10:              oldFirstChar,
                     11:              firstChar
                     12: 
                     13:        doubleQuote := cset("\"")
                     14:        oldFirstChar := ""
                     15: 
                     16:        # read until end of file
                     17:        while line := read() do  {
                     18:                line ? {
                     19:                        tab(upto(doubleQuote)) | write("can't find double q")
                     20:                        move(1)
                     21:                        firstChar :=  &subject[&pos] }
                     22:        
                     23:                # are the first two letters different?
                     24:                if firstChar ~== oldFirstChar then {
                     25:                        write(".LB ", firstChar) }
                     26: 
                     27:                oldFirstChar := firstChar
                     28:                write(line) }
                     29:        end

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