54 lines
2.3 KiB
Python
54 lines
2.3 KiB
Python
import re
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from smnp.note.model import Note
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from smnp.token.model import Token
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from smnp.token.type import TokenType
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def noteTokenizer(input, current, line):
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consumedChars = 0
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notePitch = None
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octave = None
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duration = None
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dot = False
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rawValue = ''
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if input[current] == '@':
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rawValue += input[current+consumedChars]
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consumedChars += 1 # TODO: Check if next item does even exist
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if input[current+consumedChars] in ('C', 'c', 'D', 'd', 'E', 'e', 'F', 'f', 'G', 'g', 'A', 'a', 'H', 'h', 'B', 'b'):
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rawValue += input[current + consumedChars]
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notePitch = input[current+consumedChars]
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consumedChars += 1
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if current+consumedChars < len(input) and input[current+consumedChars] in ('b', '#'):
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rawValue += input[current + consumedChars]
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notePitch += input[current+consumedChars]
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consumedChars += 1
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if current+consumedChars < len(input) and re.match(r'\d', input[current+consumedChars]):
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rawValue += input[current + consumedChars]
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octave = input[current+consumedChars]
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consumedChars += 1
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if current+consumedChars < len(input) and input[current+consumedChars] == ':':
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rawValue += input[current + consumedChars]
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duration = ''
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consumedChars += 1
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while current+consumedChars < len(input) and re.match(r'\d', input[current+consumedChars]):
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rawValue += input[current + consumedChars]
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duration += input[current+consumedChars]
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consumedChars += 1
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if len(duration) == 0:
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return (0, None)
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dot = (current+consumedChars) < len(input) and input[current+consumedChars] == 'd'
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if dot:
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rawValue += input[current + consumedChars]
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consumedChars += 1
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octave = int(octave) if octave is not None else None
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duration = int(duration) if duration is not None else None
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value = Note(notePitch, octave, duration, dot)
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return (consumedChars, Token(TokenType.NOTE, value, (line, current), rawValue))
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return (0, None)
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