# strutil.py - string utilities for Mercurial

#

# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

def findall(haystack, needle, start=0, end=None):

    if end is None:

        end = len(haystack)

    if end < 0:

        end += len(haystack)

    if start < 0:

        start += len(haystack)

    while start < end:

        c = haystack.find(needle, start, end)

        if c == -1:

            break

        yield c

        start = c + 1

def rfindall(haystack, needle, start=0, end=None):

    if end is None:

        end = len(haystack)

    if end < 0:

        end += len(haystack)

    if start < 0:

        start += len(haystack)

    while end >= 0:

        c = haystack.rfind(needle, start, end)

        if c == -1:

            break

        yield c

        end = c - 1