[OpenSPARC-T2-SAM] / sam-t2 / devtools / v9 / lib / python2.4 / dircache.py

"""Read and cache directory listings.

The listdir() routine returns a sorted list of the files in a directory,
using a cache to avoid reading the directory more often than necessary.
The annotate() routine appends slashes to directories."""

import os

__all__ = ["listdir", "opendir", "annotate", "reset"]

cache = {}

def reset():
    """Reset the cache completely."""
    global cache
    cache = {}

def listdir(path):
    """List directory contents, using cache."""
    try:
        cached_mtime, list = cache[path]
        del cache[path]
    except KeyError:
        cached_mtime, list = -1, []
    mtime = os.stat(path).st_mtime
    if mtime != cached_mtime:
        list = os.listdir(path)
        list.sort()
    cache[path] = mtime, list
    return list

opendir = listdir # XXX backward compatibility

def annotate(head, list):
    """Add '/' suffixes to directories."""
    for i in range(len(list)):
        if os.path.isdir(os.path.join(head, list[i])):
            list[i] = list[i] + '/'
Commit	Line	Data
920dae64 AT	1	"""Read and cache directory listings.
	2
	3	The listdir() routine returns a sorted list of the files in a directory,
	4	using a cache to avoid reading the directory more often than necessary.
	5	The annotate() routine appends slashes to directories."""
	6
	7	import os
	8
	9	__all__ = ["listdir", "opendir", "annotate", "reset"]
	10
	11	cache = {}
	12
	13	def reset():
	14	"""Reset the cache completely."""
	15	global cache
	16	cache = {}
	17
	18	def listdir(path):
	19	"""List directory contents, using cache."""
	20	try:
	21	cached_mtime, list = cache[path]
	22	del cache[path]
	23	except KeyError:
	24	cached_mtime, list = -1, []
	25	mtime = os.stat(path).st_mtime
	26	if mtime != cached_mtime:
	27	list = os.listdir(path)
	28	list.sort()
	29	cache[path] = mtime, list
	30	return list
	31
	32	opendir = listdir # XXX backward compatibility
	33
	34	def annotate(head, list):
	35	"""Add '/' suffixes to directories."""
	36	for i in range(len(list)):
	37	if os.path.isdir(os.path.join(head, list[i])):
	38	list[i] = list[i] + '/'