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fix speed regression in mdiff caused by line split bugfix.

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This commit is contained in:
Vadim Gelfer 2006-05-10 13:39:12 -07:00
parent 20d2979fe8
commit 1de5bf52df
1 changed files with 12 additions and 17 deletions
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29
mercurial/mdiff.py
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@ -9,20 +9,15 @@ from demandload import demandload
import struct, bdiff, util, mpatch
demandload(globals(), "re")
def splitnewlines(text, keepends=False):
def splitnewlines(text):
'''like str.splitlines, but only split on newlines.'''
i = 0
lines = []
while True:
n = text.find('\n', i)
if n == -1:
last = text[i:]
if last:
lines.append(last)
return lines
lines.append(text[i:keepends and n+1 or n])
i = n + 1
lines = [l + '\n' for l in text.split('\n')]
if lines:
if lines[-1] == '\n':
lines.pop()
else:
lines[-1] = lines[-1][:-1]
return lines
def unidiff(a, ad, b, bd, fn, r=None, text=False,
showfunc=False, ignorews=False):
@ -33,7 +28,7 @@ def unidiff(a, ad, b, bd, fn, r=None, text=False,
if not text and (util.binary(a) or util.binary(b)):
l = ['Binary file %s has changed\n' % fn]
elif not a:
b = splitnewlines(b, keepends=True)
b = splitnewlines(b)
if a is None:
l1 = "--- %s\t%s\n" % ("/dev/null", epoch)
else:
@ -42,7 +37,7 @@ def unidiff(a, ad, b, bd, fn, r=None, text=False,
l3 = "@@ -0,0 +1,%d @@\n" % len(b)
l = [l1, l2, l3] + ["+" + e for e in b]
elif not b:
a = splitnewlines(a, keepends=True)
a = splitnewlines(a)
l1 = "--- %s\t%s\n" % ("a/" + fn, ad)
if b is None:
l2 = "+++ %s\t%s\n" % ("/dev/null", epoch)
@ -51,8 +46,8 @@ def unidiff(a, ad, b, bd, fn, r=None, text=False,
l3 = "@@ -1,%d +0,0 @@\n" % len(a)
l = [l1, l2, l3] + ["-" + e for e in a]
else:
al = splitnewlines(a, keepends=True)
bl = splitnewlines(b, keepends=True)
al = splitnewlines(a)
bl = splitnewlines(b)
l = list(bunidiff(a, b, al, bl, "a/" + fn, "b/" + fn,
showfunc=showfunc, ignorews=ignorews))
if not l: return ""