Mercurial > repos > bcclaywell > argo_navis

annotate venv/lib/python2.7/sre_compile.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 # -*- coding: utf-8 -*-
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2 #
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3 # Secret Labs' Regular Expression Engine
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4 #
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5 # convert template to internal format
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6 #
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7 # Copyright (c) 1997-2001 by Secret Labs AB. All rights reserved.
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8 #
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9 # See the sre.py file for information on usage and redistribution.
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10 #
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11
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12 """Internal support module for sre"""
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13
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14 import _sre, sys
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15 import sre_parse
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16 from sre_constants import *
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17
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18 assert _sre.MAGIC == MAGIC, "SRE module mismatch"
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19
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20 if _sre.CODESIZE == 2:
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21 MAXCODE = 65535
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22 else:
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23 MAXCODE = 0xFFFFFFFFL
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24
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25 _LITERAL_CODES = set([LITERAL, NOT_LITERAL])
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26 _REPEATING_CODES = set([REPEAT, MIN_REPEAT, MAX_REPEAT])
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27 _SUCCESS_CODES = set([SUCCESS, FAILURE])
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28 _ASSERT_CODES = set([ASSERT, ASSERT_NOT])
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29
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30 # Sets of lowercase characters which have the same uppercase.
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31 _equivalences = (
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32 # LATIN SMALL LETTER I, LATIN SMALL LETTER DOTLESS I
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33 (0x69, 0x131), # iı
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34 # LATIN SMALL LETTER S, LATIN SMALL LETTER LONG S
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35 (0x73, 0x17f), # sſ
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36 # MICRO SIGN, GREEK SMALL LETTER MU
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37 (0xb5, 0x3bc), # µμ
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38 # COMBINING GREEK YPOGEGRAMMENI, GREEK SMALL LETTER IOTA, GREEK PROSGEGRAMMENI
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39 (0x345, 0x3b9, 0x1fbe), # \u0345ιι
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40 # GREEK SMALL LETTER BETA, GREEK BETA SYMBOL
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41 (0x3b2, 0x3d0), # βϐ
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42 # GREEK SMALL LETTER EPSILON, GREEK LUNATE EPSILON SYMBOL
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43 (0x3b5, 0x3f5), # εϵ
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44 # GREEK SMALL LETTER THETA, GREEK THETA SYMBOL
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45 (0x3b8, 0x3d1), # θϑ
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46 # GREEK SMALL LETTER KAPPA, GREEK KAPPA SYMBOL
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47 (0x3ba, 0x3f0), # κϰ
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48 # GREEK SMALL LETTER PI, GREEK PI SYMBOL
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49 (0x3c0, 0x3d6), # πϖ
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50 # GREEK SMALL LETTER RHO, GREEK RHO SYMBOL
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51 (0x3c1, 0x3f1), # ρϱ
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52 # GREEK SMALL LETTER FINAL SIGMA, GREEK SMALL LETTER SIGMA
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53 (0x3c2, 0x3c3), # ςσ
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54 # GREEK SMALL LETTER PHI, GREEK PHI SYMBOL
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55 (0x3c6, 0x3d5), # φϕ
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56 # LATIN SMALL LETTER S WITH DOT ABOVE, LATIN SMALL LETTER LONG S WITH DOT ABOVE
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57 (0x1e61, 0x1e9b), # ṡẛ
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58 )
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59
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60 # Maps the lowercase code to lowercase codes which have the same uppercase.
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61 _ignorecase_fixes = {i: tuple(j for j in t if i != j)
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62 for t in _equivalences for i in t}
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63
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64 def _compile(code, pattern, flags):
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65 # internal: compile a (sub)pattern
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66 emit = code.append
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67 _len = len
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68 LITERAL_CODES = _LITERAL_CODES
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69 REPEATING_CODES = _REPEATING_CODES
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70 SUCCESS_CODES = _SUCCESS_CODES
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71 ASSERT_CODES = _ASSERT_CODES
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72 if (flags & SRE_FLAG_IGNORECASE and
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73 not (flags & SRE_FLAG_LOCALE) and
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74 flags & SRE_FLAG_UNICODE):
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75 fixes = _ignorecase_fixes
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76 else:
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77 fixes = None
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78 for op, av in pattern:
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79 if op in LITERAL_CODES:
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80 if flags & SRE_FLAG_IGNORECASE:
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81 lo = _sre.getlower(av, flags)
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82 if fixes and lo in fixes:
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83 emit(OPCODES[IN_IGNORE])
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84 skip = _len(code); emit(0)
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85 if op is NOT_LITERAL:
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86 emit(OPCODES[NEGATE])
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87 for k in (lo,) + fixes[lo]:
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88 emit(OPCODES[LITERAL])
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89 emit(k)
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90 emit(OPCODES[FAILURE])
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91 code[skip] = _len(code) - skip
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92 else:
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93 emit(OPCODES[OP_IGNORE[op]])
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94 emit(lo)
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95 else:
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96 emit(OPCODES[op])
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97 emit(av)
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98 elif op is IN:
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99 if flags & SRE_FLAG_IGNORECASE:
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100 emit(OPCODES[OP_IGNORE[op]])
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101 def fixup(literal, flags=flags):
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102 return _sre.getlower(literal, flags)
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103 else:
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104 emit(OPCODES[op])
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105 fixup = None
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106 skip = _len(code); emit(0)
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107 _compile_charset(av, flags, code, fixup, fixes)
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108 code[skip] = _len(code) - skip
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109 elif op is ANY:
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110 if flags & SRE_FLAG_DOTALL:
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111 emit(OPCODES[ANY_ALL])
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112 else:
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113 emit(OPCODES[ANY])
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114 elif op in REPEATING_CODES:
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115 if flags & SRE_FLAG_TEMPLATE:
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116 raise error, "internal: unsupported template operator"
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117 emit(OPCODES[REPEAT])
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118 skip = _len(code); emit(0)
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119 emit(av[0])
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120 emit(av[1])
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121 _compile(code, av[2], flags)
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122 emit(OPCODES[SUCCESS])
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123 code[skip] = _len(code) - skip
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124 elif _simple(av) and op is not REPEAT:
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125 if op is MAX_REPEAT:
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126 emit(OPCODES[REPEAT_ONE])
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127 else:
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128 emit(OPCODES[MIN_REPEAT_ONE])
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129 skip = _len(code); emit(0)
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130 emit(av[0])
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131 emit(av[1])
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132 _compile(code, av[2], flags)
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133 emit(OPCODES[SUCCESS])
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134 code[skip] = _len(code) - skip
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135 else:
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136 emit(OPCODES[REPEAT])
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137 skip = _len(code); emit(0)
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138 emit(av[0])
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139 emit(av[1])
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140 _compile(code, av[2], flags)
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141 code[skip] = _len(code) - skip
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142 if op is MAX_REPEAT:
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143 emit(OPCODES[MAX_UNTIL])
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144 else:
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145 emit(OPCODES[MIN_UNTIL])
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146 elif op is SUBPATTERN:
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147 if av[0]:
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148 emit(OPCODES[MARK])
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149 emit((av[0]-1)*2)
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150 # _compile_info(code, av[1], flags)
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151 _compile(code, av[1], flags)
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152 if av[0]:
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153 emit(OPCODES[MARK])
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154 emit((av[0]-1)*2+1)
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155 elif op in SUCCESS_CODES:
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156 emit(OPCODES[op])
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157 elif op in ASSERT_CODES:
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158 emit(OPCODES[op])
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159 skip = _len(code); emit(0)
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160 if av[0] >= 0:
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161 emit(0) # look ahead
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162 else:
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163 lo, hi = av[1].getwidth()
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164 if lo != hi:
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165 raise error, "look-behind requires fixed-width pattern"
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166 emit(lo) # look behind
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167 _compile(code, av[1], flags)
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168 emit(OPCODES[SUCCESS])
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169 code[skip] = _len(code) - skip
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170 elif op is CALL:
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171 emit(OPCODES[op])
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172 skip = _len(code); emit(0)
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173 _compile(code, av, flags)
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174 emit(OPCODES[SUCCESS])
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175 code[skip] = _len(code) - skip
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176 elif op is AT:
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177 emit(OPCODES[op])
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178 if flags & SRE_FLAG_MULTILINE:
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179 av = AT_MULTILINE.get(av, av)
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180 if flags & SRE_FLAG_LOCALE:
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181 av = AT_LOCALE.get(av, av)
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182 elif flags & SRE_FLAG_UNICODE:
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183 av = AT_UNICODE.get(av, av)
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184 emit(ATCODES[av])
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185 elif op is BRANCH:
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186 emit(OPCODES[op])
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187 tail = []
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188 tailappend = tail.append
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189 for av in av[1]:
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190 skip = _len(code); emit(0)
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191 # _compile_info(code, av, flags)
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192 _compile(code, av, flags)
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193 emit(OPCODES[JUMP])
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194 tailappend(_len(code)); emit(0)
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195 code[skip] = _len(code) - skip
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196 emit(0) # end of branch
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197 for tail in tail:
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198 code[tail] = _len(code) - tail
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199 elif op is CATEGORY:
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200 emit(OPCODES[op])
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201 if flags & SRE_FLAG_LOCALE:
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202 av = CH_LOCALE[av]
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203 elif flags & SRE_FLAG_UNICODE:
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204 av = CH_UNICODE[av]
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205 emit(CHCODES[av])
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206 elif op is GROUPREF:
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207 if flags & SRE_FLAG_IGNORECASE:
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208 emit(OPCODES[OP_IGNORE[op]])
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209 else:
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210 emit(OPCODES[op])
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211 emit(av-1)
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212 elif op is GROUPREF_EXISTS:
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213 emit(OPCODES[op])
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214 emit(av[0]-1)
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215 skipyes = _len(code); emit(0)
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216 _compile(code, av[1], flags)
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217 if av[2]:
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218 emit(OPCODES[JUMP])
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219 skipno = _len(code); emit(0)
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220 code[skipyes] = _len(code) - skipyes + 1
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221 _compile(code, av[2], flags)
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222 code[skipno] = _len(code) - skipno
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223 else:
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224 code[skipyes] = _len(code) - skipyes + 1
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225 else:
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226 raise ValueError, ("unsupported operand type", op)
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227
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228 def _compile_charset(charset, flags, code, fixup=None, fixes=None):
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229 # compile charset subprogram
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230 emit = code.append
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231 for op, av in _optimize_charset(charset, fixup, fixes,
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232 flags & SRE_FLAG_UNICODE):
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233 emit(OPCODES[op])
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234 if op is NEGATE:
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235 pass
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236 elif op is LITERAL:
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237 emit(av)
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238 elif op is RANGE:
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239 emit(av[0])
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240 emit(av[1])
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241 elif op is CHARSET:
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242 code.extend(av)
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243 elif op is BIGCHARSET:
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244 code.extend(av)
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245 elif op is CATEGORY:
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246 if flags & SRE_FLAG_LOCALE:
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247 emit(CHCODES[CH_LOCALE[av]])
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248 elif flags & SRE_FLAG_UNICODE:
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249 emit(CHCODES[CH_UNICODE[av]])
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250 else:
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251 emit(CHCODES[av])
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252 else:
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253 raise error, "internal: unsupported set operator"
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254 emit(OPCODES[FAILURE])
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255
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256 def _optimize_charset(charset, fixup, fixes, isunicode):
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257 # internal: optimize character set
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258 out = []
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259 tail = []
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260 charmap = bytearray(256)
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261 for op, av in charset:
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262 while True:
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263 try:
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264 if op is LITERAL:
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265 if fixup:
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266 i = fixup(av)
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267 charmap[i] = 1
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268 if fixes and i in fixes:
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269 for k in fixes[i]:
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270 charmap[k] = 1
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271 else:
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272 charmap[av] = 1
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273 elif op is RANGE:
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274 r = range(av[0], av[1]+1)
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275 if fixup:
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276 r = map(fixup, r)
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277 if fixup and fixes:
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278 for i in r:
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279 charmap[i] = 1
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280 if i in fixes:
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281 for k in fixes[i]:
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282 charmap[k] = 1
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283 else:
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284 for i in r:
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285 charmap[i] = 1
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286 elif op is NEGATE:
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287 out.append((op, av))
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288 else:
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289 tail.append((op, av))
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290 except IndexError:
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291 if len(charmap) == 256:
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292 # character set contains non-UCS1 character codes
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293 charmap += b'\0' * 0xff00
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294 continue
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295 # character set contains non-BMP character codes
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296 if fixup and isunicode and op is RANGE:
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297 lo, hi = av
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298 ranges = [av]
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299 # There are only two ranges of cased astral characters:
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300 # 10400-1044F (Deseret) and 118A0-118DF (Warang Citi).
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301 _fixup_range(max(0x10000, lo), min(0x11fff, hi),
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302 ranges, fixup)
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303 for lo, hi in ranges:
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304 if lo == hi:
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305 tail.append((LITERAL, hi))
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306 else:
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307 tail.append((RANGE, (lo, hi)))
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308 else:
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309 tail.append((op, av))
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310 break
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311
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312 # compress character map
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313 runs = []
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314 q = 0
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315 while True:
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316 p = charmap.find(b'\1', q)
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317 if p < 0:
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318 break
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319 if len(runs) >= 2:
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320 runs = None
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321 break
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322 q = charmap.find(b'\0', p)
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323 if q < 0:
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324 runs.append((p, len(charmap)))
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325 break
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326 runs.append((p, q))
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327 if runs is not None:
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328 # use literal/range
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329 for p, q in runs:
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330 if q - p == 1:
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331 out.append((LITERAL, p))
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332 else:
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333 out.append((RANGE, (p, q - 1)))
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334 out += tail
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335 # if the case was changed or new representation is more compact
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336 if fixup or len(out) < len(charset):
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337 return out
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338 # else original character set is good enough
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339 return charset
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340
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341 # use bitmap
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342 if len(charmap) == 256:
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343 data = _mk_bitmap(charmap)
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344 out.append((CHARSET, data))
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345 out += tail
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346 return out
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347
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348 # To represent a big charset, first a bitmap of all characters in the
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349 # set is constructed. Then, this bitmap is sliced into chunks of 256
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350 # characters, duplicate chunks are eliminated, and each chunk is
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351 # given a number. In the compiled expression, the charset is
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352 # represented by a 32-bit word sequence, consisting of one word for
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353 # the number of different chunks, a sequence of 256 bytes (64 words)
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354 # of chunk numbers indexed by their original chunk position, and a
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355 # sequence of 256-bit chunks (8 words each).
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356
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357 # Compression is normally good: in a typical charset, large ranges of
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358 # Unicode will be either completely excluded (e.g. if only cyrillic
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359 # letters are to be matched), or completely included (e.g. if large
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360 # subranges of Kanji match). These ranges will be represented by
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361 # chunks of all one-bits or all zero-bits.
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362
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363 # Matching can be also done efficiently: the more significant byte of
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364 # the Unicode character is an index into the chunk number, and the
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365 # less significant byte is a bit index in the chunk (just like the
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366 # CHARSET matching).
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367
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368 # In UCS-4 mode, the BIGCHARSET opcode still supports only subsets
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369 # of the basic multilingual plane; an efficient representation
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370 # for all of Unicode has not yet been developed.
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371
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372 charmap = bytes(charmap) # should be hashable
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373 comps = {}
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374 mapping = bytearray(256)
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bcclaywell
parents:
diff changeset
375 block = 0
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bcclaywell
parents:
diff changeset
376 data = bytearray()
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bcclaywell
parents:
diff changeset
377 for i in range(0, 65536, 256):
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bcclaywell
parents:
diff changeset
378 chunk = charmap[i: i + 256]
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bcclaywell
parents:
diff changeset
379 if chunk in comps:
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bcclaywell
parents:
diff changeset
380 mapping[i // 256] = comps[chunk]
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bcclaywell
parents:
diff changeset
381 else:
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bcclaywell
parents:
diff changeset
382 mapping[i // 256] = comps[chunk] = block
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bcclaywell
parents:
diff changeset
383 block += 1
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bcclaywell
parents:
diff changeset
384 data += chunk
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bcclaywell
parents:
diff changeset
385 data = _mk_bitmap(data)
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bcclaywell
parents:
diff changeset
386 data[0:0] = [block] + _bytes_to_codes(mapping)
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bcclaywell
parents:
diff changeset
387 out.append((BIGCHARSET, data))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
388 out += tail
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
389 return out
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bcclaywell
parents:
diff changeset
390
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bcclaywell
parents:
diff changeset
391 def _fixup_range(lo, hi, ranges, fixup):
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parents:
diff changeset
392 for i in map(fixup, range(lo, hi+1)):
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bcclaywell
parents:
diff changeset
393 for k, (lo, hi) in enumerate(ranges):
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bcclaywell
parents:
diff changeset
394 if i < lo:
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bcclaywell
parents:
diff changeset
395 if l == lo - 1:
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bcclaywell
parents:
diff changeset
396 ranges[k] = (i, hi)
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bcclaywell
parents:
diff changeset
397 else:
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bcclaywell
parents:
diff changeset
398 ranges.insert(k, (i, i))
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bcclaywell
parents:
diff changeset
399 break
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bcclaywell
parents:
diff changeset
400 elif i > hi:
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bcclaywell
parents:
diff changeset
401 if i == hi + 1:
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bcclaywell
parents:
diff changeset
402 ranges[k] = (lo, i)
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bcclaywell
parents:
diff changeset
403 break
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bcclaywell
parents:
diff changeset
404 else:
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bcclaywell
parents:
diff changeset
405 break
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bcclaywell
parents:
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406 else:
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bcclaywell
parents:
diff changeset
407 ranges.append((i, i))
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bcclaywell
parents:
diff changeset
408
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bcclaywell
parents:
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409 _CODEBITS = _sre.CODESIZE * 8
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bcclaywell
parents:
diff changeset
410 _BITS_TRANS = b'0' + b'1' * 255
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bcclaywell
parents:
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411 def _mk_bitmap(bits, _CODEBITS=_CODEBITS, _int=int):
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bcclaywell
parents:
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412 s = bytes(bits).translate(_BITS_TRANS)[::-1]
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bcclaywell
parents:
diff changeset
413 return [_int(s[i - _CODEBITS: i], 2)
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bcclaywell
parents:
diff changeset
414 for i in range(len(s), 0, -_CODEBITS)]
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bcclaywell
parents:
diff changeset
415
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bcclaywell
parents:
diff changeset
416 def _bytes_to_codes(b):
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bcclaywell
parents:
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417 # Convert block indices to word array
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bcclaywell
parents:
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418 import array
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parents:
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419 if _sre.CODESIZE == 2:
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bcclaywell
parents:
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420 code = 'H'
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parents:
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421 else:
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bcclaywell
parents:
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422 code = 'I'
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bcclaywell
parents:
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423 a = array.array(code, bytes(b))
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bcclaywell
parents:
diff changeset
424 assert a.itemsize == _sre.CODESIZE
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bcclaywell
parents:
diff changeset
425 assert len(a) * a.itemsize == len(b)
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bcclaywell
parents:
diff changeset
426 return a.tolist()
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bcclaywell
parents:
diff changeset
427
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bcclaywell
parents:
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428 def _simple(av):
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bcclaywell
parents:
diff changeset
429 # check if av is a "simple" operator
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bcclaywell
parents:
diff changeset
430 lo, hi = av[2].getwidth()
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bcclaywell
parents:
diff changeset
431 return lo == hi == 1 and av[2][0][0] != SUBPATTERN
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bcclaywell
parents:
diff changeset
432
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parents:
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433 def _compile_info(code, pattern, flags):
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parents:
diff changeset
434 # internal: compile an info block. in the current version,
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bcclaywell
parents:
diff changeset
435 # this contains min/max pattern width, and an optional literal
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bcclaywell
parents:
diff changeset
436 # prefix or a character map
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bcclaywell
parents:
diff changeset
437 lo, hi = pattern.getwidth()
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bcclaywell
parents:
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438 if lo == 0:
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bcclaywell
parents:
diff changeset
439 return # not worth it
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bcclaywell
parents:
diff changeset
440 # look for a literal prefix
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bcclaywell
parents:
diff changeset
441 prefix = []
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bcclaywell
parents:
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442 prefixappend = prefix.append
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bcclaywell
parents:
diff changeset
443 prefix_skip = 0
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bcclaywell
parents:
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444 charset = [] # not used
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bcclaywell
parents:
diff changeset
445 charsetappend = charset.append
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bcclaywell
parents:
diff changeset
446 if not (flags & SRE_FLAG_IGNORECASE):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
447 # look for literal prefix
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
448 for op, av in pattern.data:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
449 if op is LITERAL:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
450 if len(prefix) == prefix_skip:
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bcclaywell
parents:
diff changeset
451 prefix_skip = prefix_skip + 1
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bcclaywell
parents:
diff changeset
452 prefixappend(av)
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bcclaywell
parents:
diff changeset
453 elif op is SUBPATTERN and len(av[1]) == 1:
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bcclaywell
parents:
diff changeset
454 op, av = av[1][0]
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bcclaywell
parents:
diff changeset
455 if op is LITERAL:
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bcclaywell
parents:
diff changeset
456 prefixappend(av)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
457 else:
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bcclaywell
parents:
diff changeset
458 break
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bcclaywell
parents:
diff changeset
459 else:
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bcclaywell
parents:
diff changeset
460 break
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
461 # if no prefix, look for charset prefix
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bcclaywell
parents:
diff changeset
462 if not prefix and pattern.data:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
463 op, av = pattern.data[0]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
464 if op is SUBPATTERN and av[1]:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
465 op, av = av[1][0]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
466 if op is LITERAL:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
467 charsetappend((op, av))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
468 elif op is BRANCH:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
469 c = []
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
470 cappend = c.append
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
471 for p in av[1]:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
472 if not p:
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bcclaywell
parents:
diff changeset
473 break
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
474 op, av = p[0]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
475 if op is LITERAL:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
476 cappend((op, av))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
477 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
478 break
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
479 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
480 charset = c
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
481 elif op is BRANCH:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
482 c = []
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
483 cappend = c.append
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
484 for p in av[1]:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
485 if not p:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
486 break
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
487 op, av = p[0]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
488 if op is LITERAL:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
489 cappend((op, av))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
490 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
491 break
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
492 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
493 charset = c
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
494 elif op is IN:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
495 charset = av
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
496 ## if prefix:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
497 ## print "*** PREFIX", prefix, prefix_skip
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bcclaywell
parents:
diff changeset
498 ## if charset:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
499 ## print "*** CHARSET", charset
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bcclaywell
parents:
diff changeset
500 # add an info block
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bcclaywell
parents:
diff changeset
501 emit = code.append
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
502 emit(OPCODES[INFO])
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bcclaywell
parents:
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503 skip = len(code); emit(0)
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504 # literal flag
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505 mask = 0
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506 if prefix:
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507 mask = SRE_INFO_PREFIX
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508 if len(prefix) == prefix_skip == len(pattern.data):
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509 mask = mask + SRE_INFO_LITERAL
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510 elif charset:
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511 mask = mask + SRE_INFO_CHARSET
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512 emit(mask)
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513 # pattern length
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514 if lo < MAXCODE:
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515 emit(lo)
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516 else:
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517 emit(MAXCODE)
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518 prefix = prefix[:MAXCODE]
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519 if hi < MAXCODE:
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520 emit(hi)
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521 else:
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522 emit(0)
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523 # add literal prefix
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524 if prefix:
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525 emit(len(prefix)) # length
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526 emit(prefix_skip) # skip
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527 code.extend(prefix)
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528 # generate overlap table
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529 table = [-1] + ([0]*len(prefix))
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530 for i in xrange(len(prefix)):
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531 table[i+1] = table[i]+1
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532 while table[i+1] > 0 and prefix[i] != prefix[table[i+1]-1]:
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533 table[i+1] = table[table[i+1]-1]+1
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534 code.extend(table[1:]) # don't store first entry
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535 elif charset:
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536 _compile_charset(charset, flags, code)
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537 code[skip] = len(code) - skip
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538
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539 try:
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540 unicode
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541 except NameError:
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542 STRING_TYPES = (type(""),)
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543 else:
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544 STRING_TYPES = (type(""), type(unicode("")))
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545
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546 def isstring(obj):
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547 for tp in STRING_TYPES:
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548 if isinstance(obj, tp):
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549 return 1
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550 return 0
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551
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552 def _code(p, flags):
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553
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554 flags = p.pattern.flags | flags
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555 code = []
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556
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557 # compile info block
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558 _compile_info(code, p, flags)
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559
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560 # compile the pattern
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561 _compile(code, p.data, flags)
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562
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563 code.append(OPCODES[SUCCESS])
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564
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565 return code
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566
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567 def compile(p, flags=0):
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568 # internal: convert pattern list to internal format
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569
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570 if isstring(p):
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571 pattern = p
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572 p = sre_parse.parse(p, flags)
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573 else:
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574 pattern = None
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575
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576 code = _code(p, flags)
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577
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578 # print code
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579
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580 # XXX: <fl> get rid of this limitation!
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581 if p.pattern.groups > 100:
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582 raise AssertionError(
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583 "sorry, but this version only supports 100 named groups"
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584 )
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585
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586 # map in either direction
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587 groupindex = p.pattern.groupdict
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588 indexgroup = [None] * p.pattern.groups
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589 for k, i in groupindex.items():
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590 indexgroup[i] = k
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591
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592 return _sre.compile(
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593 pattern, flags | p.pattern.flags, code,
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594 p.pattern.groups-1,
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595 groupindex, indexgroup
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596 )