#!/bin/sh
# vim: ft=sh ts=4 sw=4 et
#
# Generate a histogram of the line lengths in the input, whether that input
# comes from stdin or from a list of filenames on the command line.
#
# Usage: line_len_stats [filename ...]
#

awk '
START {
        maxlen = 0;
    }
    {
        len = length($0);
        count[len] += 1;
        if (len > maxlen) {
            maxlen = len;
        }
    }
END {
        for (len = 1; len <= maxlen; len++) {
            if (count[len] != 0) {
                printf "len %4d: %d\n", len, count[len];
            }
        }
    }' "$@"