Mercurial > hg > mercurial-crew-with-dirclash

annotate mercurial/mdiff.py @ 239:75840796e8e2

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mdiff.py: kill #! line, add copyright notice -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 mdiff.py: kill #! line, add copyright notice manifest hash: acb4e14d5947d0fde5b89a874af0476773ee1cee -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) iD8DBQFCoM9CywK+sNU5EO8RAizVAJ41dqQxxx8nouBxJMcFmoVRRo4GfACbB9RV Xc0cqaoPVL7p87opPKjgNWw= =HyjH -----END PGP SIGNATURE-----
author mpm@selenic.com
date Fri, 03 Jun 2005 13:44:34 -0800
parents 697f05bfe976
children afe895fcc0d0
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1 # mdiff.py - diff and patch routines for mercurial
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2 #
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3 # Copyright 2005 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms
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6 # of the GNU General Public License, incorporated herein by reference.
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7
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8 import difflib, struct, mmap
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9 from mercurial.mpatch import *
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10
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11 def unidiff(a, ad, b, bd, fn):
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12 if not a and not b: return ""
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13 a = a.splitlines(1)
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14 b = b.splitlines(1)
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15 l = list(difflib.unified_diff(a, b, "a/" + fn, "b/" + fn, ad, bd))
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16
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17 for ln in xrange(len(l)):
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18 if l[ln][-1] != '\n':
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19 l[ln] += "\n\ No newline at end of file\n"
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20
0
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21 return "".join(l)
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22
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23 def textdiff(a, b):
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24 return diff(a.splitlines(1), b.splitlines(1))
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25
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26 def sortdiff(a, b):
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27 la = lb = 0
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28 lena = len(a)
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29 lenb = len(b)
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30 while 1:
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31 am, bm, = la, lb
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32 while lb < lenb and la < len and a[la] == b[lb] :
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33 la += 1
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34 lb += 1
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35 if la>am: yield (am, bm, la-am)
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36 while lb < lenb and b[lb] < a[la]: lb += 1
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37 if lb>=lenb: break
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38 while la < lena and b[lb] > a[la]: la += 1
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39 if la>=lena: break
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40 yield (lena, lenb, 0)
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41
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42 def diff(a, b, sorted=0):
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43 if not a:
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44 s = "".join(b)
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45 return s and (struct.pack(">lll", 0, 0, len(s)) + s)
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46
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47 bin = []
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48 p = [0]
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49 for i in a: p.append(p[-1] + len(i))
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50
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51 if sorted:
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52 d = sortdiff(a, b)
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53 else:
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54 d = difflib.SequenceMatcher(None, a, b).get_matching_blocks()
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55 la = 0
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56 lb = 0
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57 for am, bm, size in d:
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58 s = "".join(b[lb:bm])
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59 if am > la or s:
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60 bin.append(struct.pack(">lll", p[la], p[am], len(s)) + s)
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61 la = am + size
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62 lb = bm + size
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63
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64 return "".join(bin)
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65
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66 def patchtext(bin):
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67 pos = 0
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68 t = []
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69 while pos < len(bin):
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70 p1, p2, l = struct.unpack(">lll", bin[pos:pos + 12])
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71 pos += 12
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72 t.append(bin[pos:pos + l])
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73 pos += l
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74 return "".join(t)
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75
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76 def patch(a, bin):
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77 return patches(a, [bin])