author | Matt Harbison <matt_harbison@yahoo.com> |
Thu, 13 Sep 2018 00:42:25 -0400 | |
changeset 39611 | f3900f4c63d4 |
parent 38971 | ee97f7a677f3 |
child 43076 | 2372284d9457 |
permissions | -rw-r--r-- |
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# linelog - efficient cache for annotate data |
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# |
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# Copyright 2018 Google LLC. |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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"""linelog is an efficient cache for annotate data inspired by SCCS Weaves. |
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SCCS Weaves are an implementation of |
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https://en.wikipedia.org/wiki/Interleaved_deltas. See |
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mercurial/help/internals/linelog.txt for an exploration of SCCS weaves |
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and how linelog works in detail. |
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Here's a hacker's summary: a linelog is a program which is executed in |
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the context of a revision. Executing the program emits information |
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about lines, including the revision that introduced them and the line |
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number in the file at the introducing revision. When an insertion or |
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deletion is performed on the file, a jump instruction is used to patch |
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in a new body of annotate information. |
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""" |
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from __future__ import absolute_import, print_function |
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import abc |
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import struct |
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from .thirdparty import ( |
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attr, |
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) |
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from . import ( |
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pycompat, |
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) |
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_llentry = struct.Struct('>II') |
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class LineLogError(Exception): |
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"""Error raised when something bad happens internally in linelog.""" |
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@attr.s |
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class lineinfo(object): |
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# Introducing revision of this line. |
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rev = attr.ib() |
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# Line number for this line in its introducing revision. |
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linenum = attr.ib() |
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# Private. Offset in the linelog program of this line. Used internally. |
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_offset = attr.ib() |
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@attr.s |
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class annotateresult(object): |
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rev = attr.ib() |
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lines = attr.ib() |
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_eof = attr.ib() |
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def __iter__(self): |
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return iter(self.lines) |
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class _llinstruction(object): |
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__metaclass__ = abc.ABCMeta |
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@abc.abstractmethod |
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def __init__(self, op1, op2): |
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pass |
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@abc.abstractmethod |
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def __str__(self): |
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pass |
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def __repr__(self): |
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return str(self) |
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@abc.abstractmethod |
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def __eq__(self, other): |
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pass |
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@abc.abstractmethod |
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def encode(self): |
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"""Encode this instruction to the binary linelog format.""" |
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@abc.abstractmethod |
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def execute(self, rev, pc, emit): |
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"""Execute this instruction. |
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Args: |
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rev: The revision we're annotating. |
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pc: The current offset in the linelog program. |
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emit: A function that accepts a single lineinfo object. |
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Returns: |
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The new value of pc. Returns None if exeuction should stop |
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(that is, we've found the end of the file.) |
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""" |
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class _jge(_llinstruction): |
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"""If the current rev is greater than or equal to op1, jump to op2.""" |
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def __init__(self, op1, op2): |
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self._cmprev = op1 |
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self._target = op2 |
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def __str__(self): |
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return r'JGE %d %d' % (self._cmprev, self._target) |
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def __eq__(self, other): |
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return (type(self) == type(other) |
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and self._cmprev == other._cmprev |
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and self._target == other._target) |
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def encode(self): |
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return _llentry.pack(self._cmprev << 2, self._target) |
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def execute(self, rev, pc, emit): |
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if rev >= self._cmprev: |
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return self._target |
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return pc + 1 |
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class _jump(_llinstruction): |
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"""Unconditional jumps are expressed as a JGE with op1 set to 0.""" |
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118 |
|
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119 |
def __init__(self, op1, op2): |
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if op1 != 0: |
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raise LineLogError("malformed JUMP, op1 must be 0, got %d" % op1) |
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self._target = op2 |
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123 |
|
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124 |
def __str__(self): |
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return r'JUMP %d' % (self._target) |
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126 |
|
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def __eq__(self, other): |
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return (type(self) == type(other) |
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and self._target == other._target) |
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130 |
|
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131 |
def encode(self): |
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return _llentry.pack(0, self._target) |
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133 |
|
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134 |
def execute(self, rev, pc, emit): |
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135 |
return self._target |
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136 |
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137 |
class _eof(_llinstruction): |
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"""EOF is expressed as a JGE that always jumps to 0.""" |
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139 |
|
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140 |
def __init__(self, op1, op2): |
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if op1 != 0: |
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raise LineLogError("malformed EOF, op1 must be 0, got %d" % op1) |
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if op2 != 0: |
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raise LineLogError("malformed EOF, op2 must be 0, got %d" % op2) |
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145 |
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146 |
def __str__(self): |
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return r'EOF' |
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148 |
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149 |
def __eq__(self, other): |
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return type(self) == type(other) |
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151 |
|
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152 |
def encode(self): |
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153 |
return _llentry.pack(0, 0) |
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154 |
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155 |
def execute(self, rev, pc, emit): |
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156 |
return None |
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157 |
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158 |
class _jl(_llinstruction): |
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"""If the current rev is less than op1, jump to op2.""" |
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160 |
|
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161 |
def __init__(self, op1, op2): |
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162 |
self._cmprev = op1 |
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163 |
self._target = op2 |
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164 |
|
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165 |
def __str__(self): |
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return r'JL %d %d' % (self._cmprev, self._target) |
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167 |
|
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168 |
def __eq__(self, other): |
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169 |
return (type(self) == type(other) |
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170 |
and self._cmprev == other._cmprev |
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171 |
and self._target == other._target) |
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172 |
|
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173 |
def encode(self): |
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174 |
return _llentry.pack(1 | (self._cmprev << 2), self._target) |
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175 |
|
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176 |
def execute(self, rev, pc, emit): |
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177 |
if rev < self._cmprev: |
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178 |
return self._target |
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179 |
return pc + 1 |
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180 |
|
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181 |
class _line(_llinstruction): |
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"""Emit a line.""" |
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183 |
|
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184 |
def __init__(self, op1, op2): |
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185 |
# This line was introduced by this revision number. |
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186 |
self._rev = op1 |
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187 |
# This line had the specified line number in the introducing revision. |
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188 |
self._origlineno = op2 |
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189 |
|
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190 |
def __str__(self): |
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191 |
return r'LINE %d %d' % (self._rev, self._origlineno) |
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192 |
|
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193 |
def __eq__(self, other): |
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194 |
return (type(self) == type(other) |
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195 |
and self._rev == other._rev |
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196 |
and self._origlineno == other._origlineno) |
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197 |
|
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198 |
def encode(self): |
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199 |
return _llentry.pack(2 | (self._rev << 2), self._origlineno) |
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200 |
|
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|
201 |
def execute(self, rev, pc, emit): |
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|
202 |
emit(lineinfo(self._rev, self._origlineno, pc)) |
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|
203 |
return pc + 1 |
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204 |
|
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|
205 |
def _decodeone(data, offset): |
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|
206 |
"""Decode a single linelog instruction from an offset in a buffer.""" |
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207 |
try: |
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|
208 |
op1, op2 = _llentry.unpack_from(data, offset) |
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209 |
except struct.error as e: |
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210 |
raise LineLogError('reading an instruction failed: %r' % e) |
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211 |
opcode = op1 & 0b11 |
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212 |
op1 = op1 >> 2 |
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213 |
if opcode == 0: |
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214 |
if op1 == 0: |
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215 |
if op2 == 0: |
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216 |
return _eof(op1, op2) |
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217 |
return _jump(op1, op2) |
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218 |
return _jge(op1, op2) |
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219 |
elif opcode == 1: |
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220 |
return _jl(op1, op2) |
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221 |
elif opcode == 2: |
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222 |
return _line(op1, op2) |
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223 |
raise NotImplementedError('Unimplemented opcode %r' % opcode) |
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224 |
|
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225 |
class linelog(object): |
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226 |
"""Efficient cache for per-line history information.""" |
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227 |
|
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228 |
def __init__(self, program=None, maxrev=0): |
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229 |
if program is None: |
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230 |
# We pad the program with an extra leading EOF so that our |
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231 |
# offsets will match the C code exactly. This means we can |
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232 |
# interoperate with the C code. |
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233 |
program = [_eof(0, 0), _eof(0, 0)] |
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|
234 |
self._program = program |
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235 |
self._lastannotate = None |
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236 |
self._maxrev = maxrev |
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237 |
|
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238 |
def __eq__(self, other): |
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239 |
return (type(self) == type(other) |
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240 |
and self._program == other._program |
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241 |
and self._maxrev == other._maxrev) |
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242 |
|
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243 |
def __repr__(self): |
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244 |
return '<linelog at %s: maxrev=%d size=%d>' % ( |
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245 |
hex(id(self)), self._maxrev, len(self._program)) |
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246 |
|
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247 |
def debugstr(self): |
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248 |
fmt = r'%%%dd %%s' % len(str(len(self._program))) |
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249 |
return pycompat.sysstr('\n').join( |
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250 |
fmt % (idx, i) for idx, i in enumerate(self._program[1:], 1)) |
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251 |
|
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252 |
@classmethod |
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253 |
def fromdata(cls, buf): |
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|
254 |
if len(buf) % _llentry.size != 0: |
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|
255 |
raise LineLogError( |
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|
256 |
"invalid linelog buffer size %d (must be a multiple of %d)" % ( |
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|
257 |
len(buf), _llentry.size)) |
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|
258 |
expected = len(buf) / _llentry.size |
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|
259 |
fakejge = _decodeone(buf, 0) |
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|
260 |
if isinstance(fakejge, _jump): |
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|
261 |
maxrev = 0 |
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|
262 |
else: |
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|
263 |
maxrev = fakejge._cmprev |
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|
264 |
numentries = fakejge._target |
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|
265 |
if expected != numentries: |
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|
266 |
raise LineLogError("corrupt linelog data: claimed" |
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|
267 |
" %d entries but given data for %d entries" % ( |
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|
268 |
expected, numentries)) |
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|
269 |
instructions = [_eof(0, 0)] |
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|
270 |
for offset in pycompat.xrange(1, numentries): |
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271 |
instructions.append(_decodeone(buf, offset * _llentry.size)) |
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|
272 |
return cls(instructions, maxrev=maxrev) |
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|
273 |
|
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|
274 |
def encode(self): |
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|
275 |
hdr = _jge(self._maxrev, len(self._program)).encode() |
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|
276 |
return hdr + ''.join(i.encode() for i in self._program[1:]) |
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|
277 |
|
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|
278 |
def clear(self): |
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|
279 |
self._program = [] |
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|
280 |
self._maxrev = 0 |
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|
281 |
self._lastannotate = None |
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|
282 |
|
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|
283 |
def replacelines_vec(self, rev, a1, a2, blines): |
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|
284 |
return self.replacelines(rev, a1, a2, 0, len(blines), |
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|
285 |
_internal_blines=blines) |
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|
286 |
|
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|
287 |
def replacelines(self, rev, a1, a2, b1, b2, _internal_blines=None): |
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|
288 |
"""Replace lines [a1, a2) with lines [b1, b2).""" |
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|
289 |
if self._lastannotate: |
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|
290 |
# TODO(augie): make replacelines() accept a revision at |
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parents:
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|
291 |
# which we're editing as well as a revision to mark |
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|
292 |
# responsible for the edits. In hg-experimental it's |
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|
293 |
# stateful like this, so we're doing the same thing to |
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|
294 |
# retain compatibility with absorb until that's imported. |
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|
295 |
ar = self._lastannotate |
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|
296 |
else: |
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|
297 |
ar = self.annotate(rev) |
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|
298 |
# ar = self.annotate(self._maxrev) |
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|
299 |
if a1 > len(ar.lines): |
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|
300 |
raise LineLogError( |
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|
301 |
'%d contains %d lines, tried to access line %d' % ( |
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|
302 |
rev, len(ar.lines), a1)) |
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changeset
|
303 |
elif a1 == len(ar.lines): |
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changeset
|
304 |
# Simulated EOF instruction since we're at EOF, which |
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changeset
|
305 |
# doesn't have a "real" line. |
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|
306 |
a1inst = _eof(0, 0) |
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|
307 |
a1info = lineinfo(0, 0, ar._eof) |
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changeset
|
308 |
else: |
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|
309 |
a1info = ar.lines[a1] |
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|
310 |
a1inst = self._program[a1info._offset] |
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Jun Wu <quark@fb.com>
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changeset
|
311 |
programlen = self._program.__len__ |
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|
312 |
oldproglen = programlen() |
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|
313 |
appendinst = self._program.append |
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changeset
|
314 |
|
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|
315 |
# insert |
38971 | 316 |
blineinfos = [] |
317 |
bappend = blineinfos.append |
|
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|
318 |
if b1 < b2: |
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changeset
|
319 |
# Determine the jump target for the JGE at the start of |
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changeset
|
320 |
# the new block. |
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parents:
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changeset
|
321 |
tgt = oldproglen + (b2 - b1 + 1) |
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parents:
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changeset
|
322 |
# Jump to skip the insert if we're at an older revision. |
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changeset
|
323 |
appendinst(_jl(rev, tgt)) |
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changeset
|
324 |
for linenum in pycompat.xrange(b1, b2): |
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changeset
|
325 |
if _internal_blines is None: |
38971 | 326 |
bappend(lineinfo(rev, linenum, programlen())) |
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|
327 |
appendinst(_line(rev, linenum)) |
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changeset
|
328 |
else: |
38971 | 329 |
newrev, newlinenum = _internal_blines[linenum] |
330 |
bappend(lineinfo(newrev, newlinenum, programlen())) |
|
331 |
appendinst(_line(newrev, newlinenum)) |
|
38795
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|
332 |
# delete |
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diff
changeset
|
333 |
if a1 < a2: |
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changeset
|
334 |
if a2 > len(ar.lines): |
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parents:
diff
changeset
|
335 |
raise LineLogError( |
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parents:
diff
changeset
|
336 |
'%d contains %d lines, tried to access line %d' % ( |
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parents:
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changeset
|
337 |
rev, len(ar.lines), a2)) |
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changeset
|
338 |
elif a2 == len(ar.lines): |
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parents:
diff
changeset
|
339 |
endaddr = ar._eof |
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changeset
|
340 |
else: |
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changeset
|
341 |
endaddr = ar.lines[a2]._offset |
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parents:
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|
342 |
if a2 > 0 and rev < self._maxrev: |
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parents:
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changeset
|
343 |
# If we're here, we're deleting a chunk of an old |
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parents:
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changeset
|
344 |
# commit, so we need to be careful and not touch |
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parents:
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|
345 |
# invisible lines between a2-1 and a2 (IOW, lines that |
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parents:
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|
346 |
# are added later). |
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parents:
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changeset
|
347 |
endaddr = ar.lines[a2 - 1]._offset + 1 |
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parents:
diff
changeset
|
348 |
appendinst(_jge(rev, endaddr)) |
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parents:
diff
changeset
|
349 |
# copy instruction from a1 |
38971 | 350 |
a1instpc = programlen() |
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parents:
diff
changeset
|
351 |
appendinst(a1inst) |
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parents:
diff
changeset
|
352 |
# if a1inst isn't a jump or EOF, then we need to add an unconditional |
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parents:
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353 |
# jump back into the program here. |
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|
354 |
if not isinstance(a1inst, (_jump, _eof)): |
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parents:
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355 |
appendinst(_jump(0, a1info._offset + 1)) |
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parents:
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|
356 |
# Patch instruction at a1, which makes our patch live. |
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parents:
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|
357 |
self._program[a1info._offset] = _jump(0, oldproglen) |
38971 | 358 |
|
359 |
# Update self._lastannotate in place. This serves as a cache to avoid |
|
360 |
# expensive "self.annotate" in this function, when "replacelines" is |
|
361 |
# used continuously. |
|
362 |
if len(self._lastannotate.lines) > a1: |
|
363 |
self._lastannotate.lines[a1]._offset = a1instpc |
|
364 |
else: |
|
365 |
assert isinstance(a1inst, _eof) |
|
366 |
self._lastannotate._eof = a1instpc |
|
367 |
self._lastannotate.lines[a1:a2] = blineinfos |
|
368 |
self._lastannotate.rev = max(self._lastannotate.rev, rev) |
|
369 |
||
38795
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linelog: add a Python implementation of the linelog datastructure
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parents:
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changeset
|
370 |
if rev > self._maxrev: |
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parents:
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|
371 |
self._maxrev = rev |
422d661056be
linelog: add a Python implementation of the linelog datastructure
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parents:
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changeset
|
372 |
|
422d661056be
linelog: add a Python implementation of the linelog datastructure
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parents:
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changeset
|
373 |
def annotate(self, rev): |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
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|
374 |
pc = 1 |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
375 |
lines = [] |
38935
27a54096c92e
linelog: fix infinite loop vulnerability
Jun Wu <quark@fb.com>
parents:
38924
diff
changeset
|
376 |
executed = 0 |
27a54096c92e
linelog: fix infinite loop vulnerability
Jun Wu <quark@fb.com>
parents:
38924
diff
changeset
|
377 |
# Sanity check: if instructions executed exceeds len(program), we |
38795
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
378 |
# hit an infinite loop in the linelog program somehow and we |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
379 |
# should stop. |
38935
27a54096c92e
linelog: fix infinite loop vulnerability
Jun Wu <quark@fb.com>
parents:
38924
diff
changeset
|
380 |
while pc is not None and executed < len(self._program): |
38795
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
381 |
inst = self._program[pc] |
422d661056be
linelog: add a Python implementation of the linelog datastructure
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parents:
diff
changeset
|
382 |
lastpc = pc |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
383 |
pc = inst.execute(rev, pc, lines.append) |
38935
27a54096c92e
linelog: fix infinite loop vulnerability
Jun Wu <quark@fb.com>
parents:
38924
diff
changeset
|
384 |
executed += 1 |
38795
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
385 |
if pc is not None: |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
386 |
raise LineLogError( |
38962
70a19e804deb
linelog: fix bytes/str issue in exception raise on Python 3
Augie Fackler <augie@google.com>
parents:
38935
diff
changeset
|
387 |
r'Probably hit an infinite loop in linelog. Program:\n' + |
38795
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
388 |
self.debugstr()) |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
389 |
ar = annotateresult(rev, lines, lastpc) |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
390 |
self._lastannotate = ar |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
391 |
return ar |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
392 |
|
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
393 |
@property |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
394 |
def maxrev(self): |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
395 |
return self._maxrev |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
396 |
|
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
397 |
# Stateful methods which depend on the value of the last |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
398 |
# annotation run. This API is for compatiblity with the original |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
399 |
# linelog, and we should probably consider refactoring it. |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
400 |
@property |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
401 |
def annotateresult(self): |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
402 |
"""Return the last annotation result. C linelog code exposed this.""" |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
403 |
return [(l.rev, l.linenum) for l in self._lastannotate.lines] |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
404 |
|
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
405 |
def getoffset(self, line): |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
406 |
return self._lastannotate.lines[line]._offset |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
407 |
|
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
408 |
def getalllines(self, start=0, end=0): |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
409 |
"""Get all lines that ever occurred in [start, end). |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
410 |
|
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
411 |
Passing start == end == 0 means "all lines ever". |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
412 |
|
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
413 |
This works in terms of *internal* program offsets, not line numbers. |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
414 |
""" |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
415 |
pc = start or 1 |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
416 |
lines = [] |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
417 |
# only take as many steps as there are instructions in the |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
418 |
# program - if we don't find an EOF or our stop-line before |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
419 |
# then, something is badly broken. |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
420 |
for step in pycompat.xrange(len(self._program)): |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
421 |
inst = self._program[pc] |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
422 |
nextpc = pc + 1 |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
423 |
if isinstance(inst, _jump): |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
424 |
nextpc = inst._target |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
425 |
elif isinstance(inst, _eof): |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
426 |
return lines |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
427 |
elif isinstance(inst, (_jl, _jge)): |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
428 |
pass |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
429 |
elif isinstance(inst, _line): |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
430 |
lines.append((inst._rev, inst._origlineno)) |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
431 |
else: |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
432 |
raise LineLogError("Illegal instruction %r" % inst) |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
433 |
if nextpc == end: |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
434 |
return lines |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
435 |
pc = nextpc |
422d661056be
linelog: add a Python implementation of the linelog datastructure
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
436 |
raise LineLogError("Failed to perform getalllines") |