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This commit is contained in:
Keith Jones
parent
03e3ad47a0
commit
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487
others/convertcore.py
Executable file
487
others/convertcore.py
Executable file
@ -0,0 +1,487 @@
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#!/usr/bin/env python
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#****************************************************************************
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# This file has been modified from its original version. It has been
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# formatted to fit your irc bot.
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#
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# Below is the original copyright. Doug Bell rocks.
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# The hijacker is Keith Jones, and he has no bomb in his shoe.
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#
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#****************************************************************************
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#****************************************************************************
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# convertcore.py, provides non-GUI base classes for data
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#
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# ConvertAll, a units conversion program
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# Copyright (C) 2002, Douglas W. Bell
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#
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# This is free software; you can redistribute it and/or modify it under the
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# terms of the GNU General Public License, Version 2. This program is
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# distributed in the hope that it will be useful, but WITTHOUT ANY WARRANTY.
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#*****************************************************************************
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#from option import Option
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import re, copy, sys, os.path
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import registry
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import conf
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#from math import *
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class UnitGroup:
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"Stores, updates and converts a group of units"
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maxDecPlcs = 12
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def __init__(self, unitData, option):
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self.unitData = unitData
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self.option = option
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self.unitList = []
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self.currentNum = 0
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self.factor = 1.0
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self.reducedList = []
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self.linear = 1
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def update(self, text, cursorPos=None):
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"Decode user entered text into units"
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self.unitList = self.parseGroup(text)
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if cursorPos != None:
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self.updateCurrentUnit(text, cursorPos)
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else:
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self.currentNum = len(self.unitList) - 1
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def updateCurrentUnit(self, text, cursorPos):
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"Set current unit number"
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self.currentNum = len(re.findall('[\*/]', text[:cursorPos]))
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def currentUnit(self):
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"Return current unit if its a full match, o/w None"
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if self.unitList and self.unitList[self.currentNum].equiv:
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return self.unitList[self.currentNum]
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return None
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def currentPartialUnit(self):
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"Return unit with at least a partial match, o/w None"
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if not self.unitList:
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return None
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return self.unitData.findPartialMatch(self.unitList[self.currentNum]\
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.name)
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def currentSortPos(self):
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"Return unit near current unit for sorting"
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if not self.unitList:
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return self.unitData[self.unitData.sortedKeys[0]]
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return self.unitData.findSortPos(self.unitList[self.currentNum]\
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.name)
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def replaceCurrent(self, unit):
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"Replace the current unit with unit"
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if self.unitList:
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exp = self.unitList[self.currentNum].exp
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self.unitList[self.currentNum] = copy.copy(unit)
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self.unitList[self.currentNum].exp = exp
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else:
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self.unitList.append(copy.copy(unit))
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def completePartial(self):
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"Replace a partial unit with a full one"
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if self.unitList and not self.unitList[self.currentNum].equiv:
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text = self.unitList[self.currentNum].name
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unit = self.unitData.findPartialMatch(text)
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if unit:
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exp = self.unitList[self.currentNum].exp
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self.unitList[self.currentNum] = copy.copy(unit)
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self.unitList[self.currentNum].exp = exp
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def moveToNext(self, upward):
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"Replace unit with adjacent one based on match or sort position"
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unit = self.currentSortPos()
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num = self.unitData.sortedKeys.index(unit.name.\
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replace(' ', '')) \
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+ (upward and -1 or 1)
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if 0 <= num < len(self.unitData.sortedKeys):
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self.replaceCurrent(self.unitData[self.unitData.sortedKeys[num]])
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def addOper(self, mult):
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"Add new operator & blank unit after current, * if mult is true"
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if self.unitList:
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self.completePartial()
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prevExp = self.unitList[self.currentNum].exp
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self.currentNum += 1
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self.unitList.insert(self.currentNum, Unit(''))
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if (not mult and prevExp > 0) or (mult and prevExp < 0):
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self.unitList[self.currentNum].exp = -1
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def changeExp(self, newExp):
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"Change the current unit's exponent"
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if self.unitList:
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self.completePartial()
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if self.unitList[self.currentNum].exp > 0:
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self.unitList[self.currentNum].exp = newExp
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else:
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self.unitList[self.currentNum].exp = -newExp
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def clearUnit(self):
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"Remove units"
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self.unitList = []
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def parseGroup(self, text):
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"Return list of units from text string"
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unitList = []
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parts = [part.strip() for part in re.split('([\*/])', text)]
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numerator = 1
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while parts:
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unit = self.parseUnit(parts.pop(0))
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if not numerator:
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unit.exp = -unit.exp
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if parts and parts.pop(0) == '/':
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numerator = not numerator
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unitList.append(unit)
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return unitList
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def parseUnit(self, text):
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"Return a valid or invalid unit with exponent from a text string"
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parts = text.split('^', 1)
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exp = 1
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if len(parts) > 1: # has exponent
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try:
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exp = int(parts[1])
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except ValueError:
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if parts[1].lstrip().startswith('-'):
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exp = -Unit.partialExp # tmp invalid exp
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else:
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exp = Unit.partialExp
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unitText = parts[0].strip().replace(' ', '')
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unit = copy.copy(self.unitData.get(unitText, None))
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if not unit and unitText and unitText[-1] == 's' and not \
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self.unitData.findPartialMatch(unitText): # check for plural
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unit = copy.copy(self.unitData.get(unitText[:-1], None))
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if not unit:
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#unit = Unit(parts[0].strip()) # tmp invalid unit
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raise UnitDataError('%s is not a valid unit.' % (unitText))
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unit.exp = exp
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return unit
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def unitString(self, unitList=None):
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"Return the full string for this group or a given group"
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if unitList == None:
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unitList = self.unitList[:]
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fullText = ''
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if unitList:
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fullText = unitList[0].unitText(0)
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numerator = 1
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for unit in unitList[1:]:
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if (numerator and unit.exp > 0) \
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or (not numerator and unit.exp < 0):
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fullText = '%s * %s' % (fullText, unit.unitText(1))
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else:
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fullText = '%s / %s' % (fullText, unit.unitText(1))
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numerator = not numerator
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return fullText
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def groupValid(self):
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"Return 1 if all unitself.reducedLists are valid"
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if not self.unitList:
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return 0
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for unit in self.unitList:
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if not unit.unitValid():
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return 0
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return 1
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def reduceGroup(self):
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"Update reduced list of units and factor"
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self.linear = 1
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self.reducedList = []
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self.factor = 1.0
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if not self.groupValid():
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return
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count = 0
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tmpList = self.unitList[:]
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while tmpList:
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count += 1
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if count > 5000:
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raise UnitDataError, 'Circular unit definition'
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unit = tmpList.pop(0)
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if unit.equiv == '!':
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self.reducedList.append(copy.copy(unit))
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elif not unit.equiv:
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raise UnitDataError, 'Invalid conversion for "%s"' % unit.name
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else:
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if unit.fromEqn:
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self.linear = 0
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newList = self.parseGroup(unit.equiv)
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for newUnit in newList:
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newUnit.exp *= unit.exp
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tmpList.extend(newList)
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self.factor *= unit.factor**unit.exp
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self.reducedList.sort()
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tmpList = self.reducedList[:]
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self.reducedList = []
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for unit in tmpList:
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if self.reducedList and unit == self.reducedList[-1]:
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self.reducedList[-1].exp += unit.exp
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else:
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self.reducedList.append(unit)
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self.reducedList = [unit for unit in self.reducedList if \
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unit.name != 'unit' and unit.exp != 0]
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def categoryMatch(self, otherGroup):
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"Return 1 if unit types are equivalent"
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if not self.checkLinear() or not otherGroup.checkLinear():
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return 0
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return self.reducedList == otherGroup.reducedList and \
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[unit.exp for unit in self.reducedList] \
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== [unit.exp for unit in otherGroup.reducedList]
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def checkLinear(self):
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"Return 1 if linear or acceptable non-linear"
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if not self.linear:
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if len(self.unitList) > 1 or self.unitList[0].exp != 1:
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return 0
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return 1
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def compatStr(self):
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"Return string with reduced unit or linear compatability problem"
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if self.checkLinear():
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return self.unitString(self.reducedList)
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return 'Cannot combine non-linear units'
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def convert(self, num, toGroup):
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"Return num of this group converted to toGroup"
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if self.linear:
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num *= self.factor
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else:
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num = self.nonLinearCalc(num, 1) * self.factor
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if toGroup.linear:
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return num / toGroup.factor
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return toGroup.nonLinearCalc(num / toGroup.factor, 0)
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def nonLinearCalc(self, num, isFrom):
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"Return result of non-linear calculation"
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x = num
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try:
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if self.unitList[0].toEqn: # regular equations
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if isFrom:
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return float(eval(self.unitList[0].fromEqn))
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return float(eval(self.unitList[0].toEqn))
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data = list(eval(self.unitList[0].fromEqn)) # extrapolation list
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if isFrom:
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data = [(float(group[0]), float(group[1])) for group in data]
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else:
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data = [(float(group[1]), float(group[0])) for group in data]
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data.sort()
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pos = len(data) - 1
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for i in range(len(data)):
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if num <= data[i][0]:
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pos = i
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break
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if pos == 0:
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pos = 1
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return (num-data[pos-1][0]) / float(data[pos][0]-data[pos-1][0]) \
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* (data[pos][1]-data[pos-1][1]) + data[pos-1][1]
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except OverflowError:
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return 1e9999
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except:
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raise UnitDataError, 'Bad equation for %s' % self.unitList[0].name
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def convertStr(self, num, toGroup):
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"Return formatted string of converted number"
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return self.formatNumStr(self.convert(num, toGroup))
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def formatNumStr(self, num):
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"Return num string formatted per options"
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decPlcs = self.option.intData('DecimalPlaces', 0, UnitGroup.maxDecPlcs)
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if self.option.boolData('SciNotation'):
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return ('%%0.%dE' % decPlcs) % num
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if self.option.boolData('FixedDecimals'):
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return ('%%0.%df' % decPlcs) % num
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return ('%%0.%dG' % decPlcs) % num
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class UnitDataError(Exception):
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pass
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class UnitData(dict):
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def __init__(self):
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dict.__init__(self)
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self.sortedKeys = []
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def readData(self):
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"Read all unit data from file"
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types = []
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typeUnits = {}
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try:
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f = file(os.path.join(conf.supybot.directories.data(), \
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'units.dat'), 'r')
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lines = f.readlines()
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f.close()
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except IOError:
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raise UnitDataError, 'Can not read "units.dat" file'
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for i in range(len(lines)): # join continuation lines
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delta = 1
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while lines[i].rstrip().endswith('\\'):
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lines[i] = ''.join([lines[i].rstrip()[:-1], lines[i+delta]])
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lines[i+delta] = ''
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delta += 1
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units = [Unit(line) for line in lines if \
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line.split('#', 1)[0].strip()] # remove comment lines
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typeText = ''
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for unit in units: # find & set headings
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if unit.name.startswith('['):
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typeText = unit.name[1:-1].strip()
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types.append(typeText)
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typeUnits[typeText] = []
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unit.typeName = typeText
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units = [unit for unit in units if unit.equiv] # keep valid units
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for unit in units:
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self[unit.name.replace(' ', '')] = unit
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typeUnits[unit.typeName].append(unit.name)
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self.sortedKeys = self.keys()
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self.sortedKeys.sort()
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print len(units), 'units loaded'
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if len(self.sortedKeys) < len(units):
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raise UnitDataError, 'Duplicate unit names found'
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return (types, typeUnits)
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def findPartialMatch(self, text):
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"Return first partially matching unit or None"
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text = text.replace(' ', '')
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if not text:
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return None
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for name in self.sortedKeys:
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if name.startswith(text):
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return self[name]
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return None
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def findSortPos(self, text):
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"Return unit whose abbrev comes immediately after text"
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text = text.replace(' ', '')
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for name in self.sortedKeys:
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if text <= name:
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return self[name]
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return self[self.sortedKeys[-1]]
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class Unit:
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"Reads and stores a single unit conversion"
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partialExp = 1000
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def __init__(self, dataStr):
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dataList = dataStr.split('#')
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unitList = dataList.pop(0).split('=', 1)
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self.name = unitList.pop(0).strip()
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self.equiv = ''
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self.factor = 1.0
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self.fromEqn = '' # used only for non-linear units
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self.toEqn = '' # used only for non-linear units
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if unitList:
|
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self.equiv = unitList[0].strip()
|
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if self.equiv[0] == '[': # used only for non-linear units
|
||||
try:
|
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self.equiv, self.fromEqn = re.match('\[(.*?)\](.*)', \
|
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self.equiv).groups()
|
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if ';' in self.fromEqn:
|
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self.fromEqn, self.toEqn = self.fromEqn.split(';', 1)
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self.toEqn = self.toEqn.strip()
|
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self.fromEqn = self.fromEqn.strip()
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except AttributeError:
|
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raise UnitDataError, 'Bad equation for "%s"' % self.name
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else: # split factor and equiv unit for linear
|
||||
parts = self.equiv.split(None, 1)
|
||||
if len(parts) > 1 and re.search('[^\d\.eE\+\-\*/]', parts[0]) \
|
||||
== None: # only allowed digits and operators
|
||||
try:
|
||||
self.factor = float(eval(parts[0]))
|
||||
self.equiv = parts[1]
|
||||
except:
|
||||
pass
|
||||
self.comments = [comm.strip() for comm in dataList]
|
||||
self.comments.extend([''] * (2 - len(self.comments)))
|
||||
self.exp = 1
|
||||
self.viewLink = [None, None]
|
||||
self.typeName = ''
|
||||
|
||||
def description(self):
|
||||
"Return name and 1st comment (usu. full name) if applicable"
|
||||
if self.comments[0]:
|
||||
return '%s (%s)' % (self.name, self.comments[0])
|
||||
return self.name
|
||||
|
||||
def unitValid(self):
|
||||
"Return 1 if unit and exponent are valid"
|
||||
if self.equiv and -Unit.partialExp < self.exp < Unit.partialExp:
|
||||
return 1
|
||||
return 0
|
||||
|
||||
def unitText(self, absExp=0):
|
||||
"Return text for unit name with exponent or absolute value of exp"
|
||||
exp = self.exp
|
||||
if absExp:
|
||||
exp = abs(self.exp)
|
||||
if exp == 1:
|
||||
return self.name
|
||||
if -Unit.partialExp < exp < Unit.partialExp:
|
||||
return '%s^%d' % (self.name, exp)
|
||||
if exp > 1:
|
||||
return '%s^' % self.name
|
||||
else:
|
||||
return '%s^-' % self.name
|
||||
|
||||
def __cmp__(self, other):
|
||||
return cmp(self.name, other.name)
|
||||
|
||||
############################################################################
|
||||
# Wrapper functionality
|
||||
#
|
||||
############################################################################
|
||||
|
||||
|
||||
# Parse the data file, and set everything up for conversion
|
||||
data = UnitData()
|
||||
(types, unitsByType) = data.readData()
|
||||
|
||||
# At the moment, we're not handling options
|
||||
option = None
|
||||
|
||||
# set up the objects for unit conversion
|
||||
fromUnit = UnitGroup(data, option)
|
||||
toUnit = UnitGroup(data, option)
|
||||
|
||||
def convert(num, unit1, unit2):
|
||||
""" Convert from one unit to another
|
||||
|
||||
num is the factor for the first unit. Raises UnitDataError for
|
||||
various errors.
|
||||
"""
|
||||
|
||||
global fromUnit
|
||||
global toUnit
|
||||
global types
|
||||
global unitsByType
|
||||
|
||||
fromUnit.update(unit1)
|
||||
toUnit.update(unit2)
|
||||
|
||||
fromUnit.reduceGroup()
|
||||
toUnit.reduceGroup()
|
||||
|
||||
# Match up unit categories
|
||||
if not fromUnit.categoryMatch(toUnit):
|
||||
raise UnitDataError('unit categories did not match')
|
||||
|
||||
return fromUnit.convert(num, toUnit)
|
||||
|
||||
|
||||
|
||||
def units(type):
|
||||
""" Return comma separated string list of units of given type, or
|
||||
a list of types if the argument is not valid.
|
||||
"""
|
||||
|
||||
global types
|
||||
global unitsByType
|
||||
|
||||
if type in types:
|
||||
return '%s units: %s' % (type, ', '.join(unitsByType[type]))
|
||||
else:
|
||||
return 'valid types: ' + ', '.join(types)
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user