view mercurial/strutil.py @ 24409:30b8db6d0c04

subrepo: add the parent context to hgsubrepo

This brings parity with gitsubrepo and svnsubrepo (which already reference their
parent), and will be used in an upcoming patch.

I'm a bit concerned that the parent context could get stale (consider what
happens when the parent repo is reverted for example).  I tried adding the
parent context to the substate tuple so that the parent is available everywhere
a state change is possible, but that made submerge() unhappy.  Even with
removing the parent context inside submerge(), I wasn't able to get all of the
test diffs fixed.

But since the other subrepos reference their parent too, if there is a problem,
it is a preexisting one (that nobody seems to be running into).  It can be fixed
if/when it pops up.

# strutil.py - string utilities for Mercurial
#
# Copyright 2006 Vadim Gelfer <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

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