view mercurial/strutil.py @ 12937:6ff784de7c3a stable

util: refactor opener

- Don't call atomictempfile or nlinks() if the path is malformed
  (no basename). Let posixfile() raise IOError directly.
- atomictempfile already breaks up hardlinks, no need to poke
  at the file with nlinks() if atomictemp.
- No need to copy the file contents to break hardlinks for 'w'rite
  modes (w, wb, w+, w+b). Unlinking and recreating the file is faster.

# 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