author | johnathan.white@2718R8BGH51 |
Sun, 25 Oct 2009 13:29:47 +0000 | |
changeset 16 | 2dd1d22cb0f3 |
parent 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
1
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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1 |
""" |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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2 |
HyperParser |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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3 |
=========== |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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This module defines the HyperParser class, which provides advanced parsing |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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5 |
abilities for the ParenMatch and other extensions. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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The HyperParser uses PyParser. PyParser is intended mostly to give information |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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7 |
on the proper indentation of code. HyperParser gives some information on the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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8 |
structure of code, used by extensions to help the user. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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9 |
""" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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10 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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import string |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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12 |
import keyword |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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13 |
import PyParse |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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14 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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15 |
class HyperParser: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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16 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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def __init__(self, editwin, index): |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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"""Initialize the HyperParser to analyze the surroundings of the given |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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19 |
index. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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""" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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21 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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self.editwin = editwin |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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23 |
self.text = text = editwin.text |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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24 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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25 |
parser = PyParse.Parser(editwin.indentwidth, editwin.tabwidth) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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26 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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27 |
def index2line(index): |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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return int(float(index)) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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lno = index2line(text.index(index)) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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if not editwin.context_use_ps1: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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for context in editwin.num_context_lines: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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startat = max(lno - context, 1) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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startatindex = `startat` + ".0" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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stopatindex = "%d.end" % lno |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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# We add the newline because PyParse requires a newline at end. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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# We add a space so that index won't be at end of line, so that |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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# its status will be the same as the char before it, if should. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parser.set_str(text.get(startatindex, stopatindex)+' \n') |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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40 |
bod = parser.find_good_parse_start( |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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editwin._build_char_in_string_func(startatindex)) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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if bod is not None or startat == 1: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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break |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parser.set_lo(bod or 0) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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45 |
else: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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46 |
r = text.tag_prevrange("console", index) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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47 |
if r: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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startatindex = r[1] |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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49 |
else: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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50 |
startatindex = "1.0" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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51 |
stopatindex = "%d.end" % lno |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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# We add the newline because PyParse requires a newline at end. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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53 |
# We add a space so that index won't be at end of line, so that |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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54 |
# its status will be the same as the char before it, if should. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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55 |
parser.set_str(text.get(startatindex, stopatindex)+' \n') |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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56 |
parser.set_lo(0) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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57 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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58 |
# We want what the parser has, except for the last newline and space. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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59 |
self.rawtext = parser.str[:-2] |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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60 |
# As far as I can see, parser.str preserves the statement we are in, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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61 |
# so that stopatindex can be used to synchronize the string with the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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62 |
# text box indices. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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63 |
self.stopatindex = stopatindex |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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64 |
self.bracketing = parser.get_last_stmt_bracketing() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
65 |
# find which pairs of bracketing are openers. These always correspond |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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66 |
# to a character of rawtext. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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67 |
self.isopener = [i>0 and self.bracketing[i][1] > self.bracketing[i-1][1] |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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68 |
for i in range(len(self.bracketing))] |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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69 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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self.set_index(index) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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71 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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72 |
def set_index(self, index): |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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73 |
"""Set the index to which the functions relate. Note that it must be |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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74 |
in the same statement. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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75 |
""" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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76 |
indexinrawtext = \ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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77 |
len(self.rawtext) - len(self.text.get(index, self.stopatindex)) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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78 |
if indexinrawtext < 0: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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79 |
raise ValueError("The index given is before the analyzed statement") |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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80 |
self.indexinrawtext = indexinrawtext |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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# find the rightmost bracket to which index belongs |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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82 |
self.indexbracket = 0 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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83 |
while self.indexbracket < len(self.bracketing)-1 and \ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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84 |
self.bracketing[self.indexbracket+1][0] < self.indexinrawtext: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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85 |
self.indexbracket += 1 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
86 |
if self.indexbracket < len(self.bracketing)-1 and \ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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87 |
self.bracketing[self.indexbracket+1][0] == self.indexinrawtext and \ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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88 |
not self.isopener[self.indexbracket+1]: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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89 |
self.indexbracket += 1 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
90 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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91 |
def is_in_string(self): |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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|
92 |
"""Is the index given to the HyperParser is in a string?""" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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|
93 |
# The bracket to which we belong should be an opener. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
94 |
# If it's an opener, it has to have a character. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
95 |
return self.isopener[self.indexbracket] and \ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
96 |
self.rawtext[self.bracketing[self.indexbracket][0]] in ('"', "'") |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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97 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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98 |
def is_in_code(self): |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
99 |
"""Is the index given to the HyperParser is in a normal code?""" |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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|
100 |
return not self.isopener[self.indexbracket] or \ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
101 |
self.rawtext[self.bracketing[self.indexbracket][0]] not in \ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
102 |
('#', '"', "'") |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
103 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
104 |
def get_surrounding_brackets(self, openers='([{', mustclose=False): |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
105 |
"""If the index given to the HyperParser is surrounded by a bracket |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
106 |
defined in openers (or at least has one before it), return the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
107 |
indices of the opening bracket and the closing bracket (or the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
108 |
end of line, whichever comes first). |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
109 |
If it is not surrounded by brackets, or the end of line comes before |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
110 |
the closing bracket and mustclose is True, returns None. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
111 |
""" |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
112 |
bracketinglevel = self.bracketing[self.indexbracket][1] |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
113 |
before = self.indexbracket |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
114 |
while not self.isopener[before] or \ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
115 |
self.rawtext[self.bracketing[before][0]] not in openers or \ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
116 |
self.bracketing[before][1] > bracketinglevel: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
117 |
before -= 1 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
118 |
if before < 0: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
119 |
return None |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
120 |
bracketinglevel = min(bracketinglevel, self.bracketing[before][1]) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
121 |
after = self.indexbracket + 1 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
122 |
while after < len(self.bracketing) and \ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
123 |
self.bracketing[after][1] >= bracketinglevel: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
124 |
after += 1 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
125 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
126 |
beforeindex = self.text.index("%s-%dc" % |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
127 |
(self.stopatindex, len(self.rawtext)-self.bracketing[before][0])) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
128 |
if after >= len(self.bracketing) or \ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
129 |
self.bracketing[after][0] > len(self.rawtext): |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
130 |
if mustclose: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
131 |
return None |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
132 |
afterindex = self.stopatindex |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
133 |
else: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
134 |
# We are after a real char, so it is a ')' and we give the index |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
135 |
# before it. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
136 |
afterindex = self.text.index("%s-%dc" % |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
137 |
(self.stopatindex, |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
138 |
len(self.rawtext)-(self.bracketing[after][0]-1))) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
139 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
140 |
return beforeindex, afterindex |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
141 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
142 |
# This string includes all chars that may be in a white space |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
143 |
_whitespace_chars = " \t\n\\" |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
144 |
# This string includes all chars that may be in an identifier |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
145 |
_id_chars = string.ascii_letters + string.digits + "_" |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
146 |
# This string includes all chars that may be the first char of an identifier |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
147 |
_id_first_chars = string.ascii_letters + "_" |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
148 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
149 |
# Given a string and pos, return the number of chars in the identifier |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
150 |
# which ends at pos, or 0 if there is no such one. Saved words are not |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
151 |
# identifiers. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
152 |
def _eat_identifier(self, str, limit, pos): |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
153 |
i = pos |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
154 |
while i > limit and str[i-1] in self._id_chars: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
155 |
i -= 1 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
156 |
if i < pos and (str[i] not in self._id_first_chars or \ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
157 |
keyword.iskeyword(str[i:pos])): |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
158 |
i = pos |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
159 |
return pos - i |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
160 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
161 |
def get_expression(self): |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
162 |
"""Return a string with the Python expression which ends at the given |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
163 |
index, which is empty if there is no real one. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
164 |
""" |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
165 |
if not self.is_in_code(): |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
166 |
raise ValueError("get_expression should only be called if index "\ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
167 |
"is inside a code.") |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
168 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
169 |
rawtext = self.rawtext |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
170 |
bracketing = self.bracketing |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
171 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
172 |
brck_index = self.indexbracket |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
173 |
brck_limit = bracketing[brck_index][0] |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
174 |
pos = self.indexinrawtext |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
175 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
176 |
last_identifier_pos = pos |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
177 |
postdot_phase = True |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
178 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
179 |
while 1: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
180 |
# Eat whitespaces, comments, and if postdot_phase is False - one dot |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
181 |
while 1: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
182 |
if pos>brck_limit and rawtext[pos-1] in self._whitespace_chars: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
183 |
# Eat a whitespace |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
184 |
pos -= 1 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
185 |
elif not postdot_phase and \ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
186 |
pos > brck_limit and rawtext[pos-1] == '.': |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
187 |
# Eat a dot |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
188 |
pos -= 1 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
189 |
postdot_phase = True |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
190 |
# The next line will fail if we are *inside* a comment, but we |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
191 |
# shouldn't be. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
192 |
elif pos == brck_limit and brck_index > 0 and \ |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
193 |
rawtext[bracketing[brck_index-1][0]] == '#': |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
194 |
# Eat a comment |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
195 |
brck_index -= 2 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
196 |
brck_limit = bracketing[brck_index][0] |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
197 |
pos = bracketing[brck_index+1][0] |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
198 |
else: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
199 |
# If we didn't eat anything, quit. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
200 |
break |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
201 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
202 |
if not postdot_phase: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
203 |
# We didn't find a dot, so the expression end at the last |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
204 |
# identifier pos. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
205 |
break |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
206 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
207 |
ret = self._eat_identifier(rawtext, brck_limit, pos) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
208 |
if ret: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
209 |
# There is an identifier to eat |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
210 |
pos = pos - ret |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
211 |
last_identifier_pos = pos |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
212 |
# Now, in order to continue the search, we must find a dot. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
213 |
postdot_phase = False |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
214 |
# (the loop continues now) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
215 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
216 |
elif pos == brck_limit: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
217 |
# We are at a bracketing limit. If it is a closing bracket, |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
218 |
# eat the bracket, otherwise, stop the search. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
219 |
level = bracketing[brck_index][1] |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
220 |
while brck_index > 0 and bracketing[brck_index-1][1] > level: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
221 |
brck_index -= 1 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
222 |
if bracketing[brck_index][0] == brck_limit: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
223 |
# We were not at the end of a closing bracket |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
224 |
break |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
225 |
pos = bracketing[brck_index][0] |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
226 |
brck_index -= 1 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
227 |
brck_limit = bracketing[brck_index][0] |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
228 |
last_identifier_pos = pos |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
229 |
if rawtext[pos] in "([": |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
230 |
# [] and () may be used after an identifier, so we |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
231 |
# continue. postdot_phase is True, so we don't allow a dot. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
232 |
pass |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
233 |
else: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
234 |
# We can't continue after other types of brackets |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
235 |
break |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
236 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
237 |
else: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
238 |
# We've found an operator or something. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
239 |
break |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
240 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
241 |
return rawtext[last_identifier_pos:self.indexinrawtext] |