mirror of
https://github.com/microtherion/VocalEasel.git
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174 lines
3.3 KiB
Python
174 lines
3.3 KiB
Python
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# common.py
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"""
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This module is an integeral part of the program
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MMA - Musical Midi Accompaniment.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Bob van der Poel <bvdp@xplornet.com>
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These are a collection of miscellaneous routines used in various
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parts of MMA. It is safe to load the whole works with:
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from MMA.common import *
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without side effects (yeah, right).
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"""
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from random import randrange
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import sys
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import gbl
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class struct:
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pass
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def error(msg):
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""" Print an error message and exit.
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If the global line number is >=0 then print the line number
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as well.
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"""
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ln = ""
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if gbl.lineno >= 0:
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ln += "<Line %d>" % gbl.lineno
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if gbl.inpath:
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ln += "<File:%s>" % gbl.inpath.fname
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if ln:
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ln += '\n'
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print "ERROR:%s %s" % (ln, msg)
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sys.exit(1)
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def warning(msg):
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""" Print warning message and return. """
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if gbl.noWarn:
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return
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ln = ""
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if gbl.lineno >= 0:
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ln = "<Line %d>" % gbl.lineno
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if gbl.inpath:
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ln += "<File:%s>" % gbl.inpath.fname
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print "Warning:%s\n %s" % (ln, msg)
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def getOffset(ticks, ran=None):
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""" Calculate a midi offset into a song.
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ticks == offset into the current bar.
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ran == random adjustment from RTIME
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When calculating the random factor the test ensures
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that a note never starts before the start of the bar.
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This is important ... voice changes, etc. will be
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buggered if we put the voice change after the first
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note-on event.
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"""
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p = gbl.tickOffset + int(ticks) # int() cast is important!
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if ran:
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r = randrange( -ran, ran+1 )
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if ticks == 0 and r < 0:
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r=0
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p+=r
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return p
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def stoi(s, errmsg=None):
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""" string to integer. """
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try:
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return int(s, 0)
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except:
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if errmsg:
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error(errmsg)
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else:
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error("Expecting integer value, not %s" % s)
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def stof(s, errmsg=None):
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""" String to floating point. """
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try:
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return float(s)
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except:
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if errmsg:
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error(errmsg)
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else:
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error("Expecting a value, not %s" % s)
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def printList(l):
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""" Print each item in a list. Works for numeric and string."""
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for a in l:
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print a,
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print
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def pextract(s, open, close, onlyone=None):
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""" Extract a parenthesized set of substrings.
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s - original string
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open - substring start tag \ can be multiple character
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close - substring end tag / strings (ie. "<<" or "-->")
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onlyone - optional, if set only the first set is extracted
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returns ( original sans subs, [subs, ...] )
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eg: pextract( "x{123}{666}y", '{', '}' )
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Returns: ( 'xy', [ '123', '666' ] )
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"""
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subs =[]
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while 1:
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lstart = s.find(open)
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lend = s.find(close)
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if lstart>-1 and lstart < lend:
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subs.append( s[lstart+len(open):lend].strip() )
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s = s[:lstart] + s[lend+len(close):]
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if onlyone:
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break
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else:
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break
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return s.strip(), subs
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