textwrapper.py

#!/usr/bin/env python3

def wrap(base, maxLen):

    ret = []
    i = -1
    lastSpace = 0
    nextSpace = 0

    while 1:
        i += 1

        if len(base) <= i:
            ret.append(base)
            break

        if base[i] == " ":
            lastSpace = i

        if base[i] == "\n":
            ret.append(base[:i])
            base = base[i+1:]

            lastSpace = 0
            i = -1

        if i >= maxLen:
            if lastSpace == 0:
                i -= 1
                ret.append(base[:i] + "-")
                base = base[i:]

            else:
                ret.append(base[:lastSpace])
                base = base[lastSpace+1:]

            lastSpace = 0
            i = -1

    return "\n".join(ret)