Mercurial > hg
annotate mercurial/pure/diffhelpers.py @ 12482:2f8740c639e4
tests: unify test-pull-pull-corruption2
author | Matt Mackall <mpm@selenic.com> |
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date | Sun, 26 Sep 2010 13:44:49 -0500 |
parents | 4f8067c94729 |
children | 80214358ac88 |
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pure Python implementation of diffhelpers.c
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1 # diffhelpers.py - pure Python implementation of diffhelpers.c |
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2 # |
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3 # Copyright 2009 Matt Mackall <mpm@selenic.com> and others |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 def addlines(fp, hunk, lena, lenb, a, b): |
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9 while True: |
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10 todoa = lena - len(a) |
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11 todob = lenb - len(b) |
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12 num = max(todoa, todob) |
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13 if num == 0: |
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14 break |
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15 for i in xrange(num): |
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16 s = fp.readline() |
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17 c = s[0] |
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18 if s == "\\ No newline at end of file\n": |
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19 fix_newline(hunk, a, b) |
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20 continue |
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21 if c == "\n": |
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22 # Some patches may be missing the control char |
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23 # on empty lines. Supply a leading space. |
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24 s = " \n" |
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25 hunk.append(s) |
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26 if c == "+": |
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27 b.append(s[1:]) |
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28 elif c == "-": |
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29 a.append(s) |
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30 else: |
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31 b.append(s[1:]) |
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32 a.append(s) |
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33 return 0 |
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34 |
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35 def fix_newline(hunk, a, b): |
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36 l = hunk[-1] |
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37 # tolerate CRLF in last line |
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38 if l.endswith('\r\n'): |
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39 hline = l[:-2] |
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40 else: |
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41 hline = l[:-1] |
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42 c = hline[0] |
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43 |
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44 if c in " +": |
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45 b[-1] = hline[1:] |
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46 if c in " -": |
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47 a[-1] = hline |
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48 hunk[-1] = hline |
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49 return 0 |
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50 |
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51 |
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52 def testhunk(a, b, bstart): |
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53 alen = len(a) |
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54 blen = len(b) |
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55 if alen > blen - bstart: |
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56 return -1 |
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57 for i in xrange(alen): |
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58 if a[i][1:] != b[i + bstart]: |
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59 return -1 |
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60 return 0 |