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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 | |
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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 | 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 | c = l[0] | |
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38 | hline = l[:-1] | |
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39 | ||
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40 | if c == " " or c == "+": | |
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41 | b[-1] = l[1:-1] | |
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42 | if c == " " or c == "-": | |
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43 | a[-1] = hline | |
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44 | hunk[-1] = hline | |
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45 | return 0 | |
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46 | ||
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47 | ||
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48 | def testhunk(a, b, bstart): | |
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49 | alen = len(a) | |
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50 | blen = len(b) | |
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51 | if alen > blen - bstart: | |
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52 | return -1 | |
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53 | for i in xrange(alen): | |
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54 | if a[i][1:] != b[i + bstart]: | |
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55 | return -1 | |
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56 | return 0 |
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