Power-Programmierung/CD1.mdf/euphoria/lines.ex

Text File | 1994-01-21 | 2KB | 63 lines

-- lines.e
-- show how many lines and characters there are in a file or bunch of files
-- usage: lines.bat files...
-- example: lines *.e

constant SCREEN = 1
constant TRUE = 1

function scan(integer fileNum)
-- count lines, non-blank lines, characters
    object line
    integer lines, nb_lines, chars

    lines = 0
    nb_lines = 0
    chars = 0
    while TRUE do
    line = gets(fileNum)
    if atom(line) then
        return {nb_lines, lines, chars} -- end of file
    else
        lines = lines + 1
        chars = chars + length(line) + 1 -- add 1 to match dir cmd
        if find(TRUE, line != ' ' and line != '\t' and line != '\n') then
        nb_lines = nb_lines + 1
        end if
    end if
    end while
end function

include getnames.e

procedure lines()
-- process all files
    integer fileNum
    sequence count, total_count
    sequence file_names

    -- gather file names
    file_names = get_names()
    if length(file_names) = 0 then
    return
    end if
    -- process all files
    total_count = {0, 0, 0}
    puts(SCREEN, "non-blank-lines   lines   chars\n")
    for i = 1 to length(file_names) do
        fileNum = open(file_names[i], "r")
        if fileNum = -1 then
            printf(SCREEN, "cannot open %s\n", {file_names[i]})
        else
        count = scan(fileNum)
        total_count = total_count + count
        printf(SCREEN, "       %8d%8d%8d %s\n", count & {file_names[i]})
        close(fileNum)
        end if
    end for
    printf(SCREEN, "       %8d%8d%8d total\n", total_count)
end procedure

lines()