// NAME
//     chrsplit - split file into equal-size chunks
//      
// SYNOPSIS
//     chrsplit -c chunksize infile outname
// 
// DESCRIPTION
//     chrsplit reads characters from the infile and writes them 
//     as one or more files of chunksize bytes (except perhaps for the last
//     one, which may be shorter).
//      
//     The first output file is outname with ".saa" appended; then
//     ".sab", ".sac", etc.
//      
// OPTIONS
//     -c chunksize
//         (mandatory) specifies the size of each output file, in bytes.
//         
// AUTHOR
//     J. Stolfi, DCC/Unicamp, april 1994.
// 
//