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v0.8.1
v0.8.1
https://github.com/python/cpython
Revision 5cb48a4c986bffcc773ada754ee9757db2a76e58 authored by Fred Drake on 22 December 1998, 18:46:13 UTC, committed by Fred Drake on 22 December 1998, 18:46:13 UTC
namespaces with 1.5.2. Added an index entry. Fixed XML expansion: XML is the "Extensible Markup Language", not the "eXtended Markup Language".
1 parent 66419ba
Tip revision: 5cb48a4c986bffcc773ada754ee9757db2a76e58 authored by Fred Drake on 22 December 1998, 18:46:13 UTC
Added a \versionchanged since the API changed to support
Added a \versionchanged since the API changed to support
Tip revision: 5cb48a4
linecache.py
# Cache lines from files.
# This is intended to read lines from modules imported -- hence if a filename
# is not found, it will look down the module search path for a file by
# that name.
import sys
import os
from stat import *
def getline(filename, lineno):
lines = getlines(filename)
if 1 <= lineno <= len(lines):
return lines[lineno-1]
else:
return ''
# The cache
cache = {} # The cache
# Clear the cache entirely
def clearcache():
global cache
cache = {}
# Get the lines for a file from the cache.
# Update the cache if it doesn't contain an entry for this file already.
def getlines(filename):
if cache.has_key(filename):
return cache[filename][2]
else:
return updatecache(filename)
# Discard cache entries that are out of date.
# (This is not checked upon each call!)
def checkcache():
for filename in cache.keys():
size, mtime, lines, fullname = cache[filename]
try:
stat = os.stat(fullname)
except os.error:
del cache[filename]
continue
if size <> stat[ST_SIZE] or mtime <> stat[ST_MTIME]:
del cache[filename]
# Update a cache entry and return its list of lines.
# If something's wrong, print a message, discard the cache entry,
# and return an empty list.
def updatecache(filename):
if cache.has_key(filename):
del cache[filename]
if not filename or filename[0] + filename[-1] == '<>':
return []
fullname = filename
try:
stat = os.stat(fullname)
except os.error, msg:
# Try looking through the module search path
basename = os.path.split(filename)[1]
for dirname in sys.path:
fullname = os.path.join(dirname, basename)
try:
stat = os.stat(fullname)
break
except os.error:
pass
else:
# No luck
## print '*** Cannot stat', filename, ':', msg
return []
try:
fp = open(fullname, 'r')
lines = fp.readlines()
fp.close()
except IOError, msg:
## print '*** Cannot open', fullname, ':', msg
return []
size, mtime = stat[ST_SIZE], stat[ST_MTIME]
cache[filename] = size, mtime, lines, fullname
return lines
Computing file changes ...