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CodeGenerator.py
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CodeGenerator.py
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import os
import os.path
class CodeGenerator( object ):
CR = '\r'
LF = '\n'
TAB = '\t'
EOF = -1
ls = "\n"
indent_unit = ' '
sourceDir = None
frameDir = None
def __init__( self ):
self._frameFile = None
self._outputFile = None
def openFiles( self, frameFileName, sourceFileName, outputFileName, backup=False ):
if isinstance(frameFileName, str):
frameFileName = [ frameFileName ]
self._frameFile = None
for frameName in frameFileName:
fr = os.path.join( CodeGenerator.sourceDir, frameName )
if not os.path.exists( fr ):
if CodeGenerator.frameDir is not None:
fr = os.path.join( CodeGenerator.frameDir, frameName )
try:
self._frameFile = file( fr, 'r' )
break
except IOError:
pass
if self._frameFile is None:
raise RuntimeError( '-- Compiler Error: Cannot open ' + frameFileName[0] )
try:
fn = os.path.join( CodeGenerator.sourceDir, outputFileName )
fn = str(fn)
if backup and os.path.exists( fn ):
if os.path.exists( fn + '.old' ):
os.remove( fn + '.old' )
os.rename( fn, fn + '.old' )
self._outputFile = file( fn, 'w' )
except:
raise RuntimeError( '-- Compiler Error: Cannot create ' + outputFileName[0] + '.py' )
def close( self ):
self._frameFile.close( )
self._outputFile.close( )
def CopyFramePart( self, stop ):
assert isinstance( stop, str )
last = 0
startCh = stop[0]
endOfStopString = len(stop) - 1
ch = self.frameRead( )
while ch != CodeGenerator.EOF:
if ch == startCh:
i = 0
if i == endOfStopString:
return # stop[0..i] found
ch = self.frameRead( )
i += 1
while ch == stop[i]:
if i == endOfStopString:
return # stop[0..i] found
ch = self.frameRead( )
i += 1
# stop[0..i-1] found; continue with last read character
self._outputFile.write( stop[0:i] )
elif ch == CodeGenerator.LF:
if last != CodeGenerator.CR:
self._outputFile.write( '\n' )
last = ch
ch = self.frameRead( )
elif ch == CodeGenerator.CR:
self._outputFile.write( '\n' )
last = ch
ch = self.frameRead()
else:
self._outputFile.write( str(ch) )
last = ch
ch = self.frameRead( )
raise RuntimeError( ' -- Compiler Error: incomplete or corrupt parser frame file' )
def CopySourcePart( self, pos, indent, forceOutput=False ):
if pos is None:
if forceOutput:
self.Indent( indent )
self._outputFile.write( 'pass' )
return
code = pos.getSubstring( )
col = pos.col - 1
lines = code.splitlines( True )
pos = 0
if (lines is None) or (len(lines) == 0):
if forceOutput:
self.Indent( indent )
self._outputFile.write( 'pass' )
return
while lines[0][pos] in ( ' ', '\t' ):
col += 1
newLineList = [ lines[0] ]
lines.pop(0)
if col < 0:
col = 0
for line in lines:
newLineList.append( line[ col : ] )
for line in newLineList:
self.Indent( indent )
self._outputFile.write( line )
if indent > 0:
self._outputFile.write( '\n' )
return
def frameRead( self ):
try:
return self._frameFile.read( 1 )
except IOError:
#raise RuntimeError('-- Compiler Error: error reading Parser.frame')
return ParserGen.EOF
def Indent( self, n ):
assert isinstance( n, int )
self._outputFile.write( CodeGenerator.indent_unit * n )
def Ch(ch):
if isinstance(self, ch, int):
ch = str( ch )
if ch < ' ' or ch >= str(127) or ch == '\'' or ch == '\\':
return ch
else:
return "ord('" + ch + "')"
def ReportCh(self, ch):
if isinstance(ch, (str,unicode)):
ch = ord(ch)
if (ch < ord(' ') or ch >= 127 or ch == ord('\'') or ch == ord('\\')):
return str(ch)
else:
return ''.join( [ "'", chr(ch), "'" ] )
def ChCond(self, ch, relOpStr='=='):
if isinstance(ch, (str,unicode)):
ch = ord(ch)
if (ch < ord(' ') or ch >= 127 or ch == ord('\'') or ch == ord('\\')):
return ''.join( [ 'ord(self.ch) ', relOpStr, " ", str(ch) ] )
else:
return ''.join( [ 'self.ch ', relOpStr, " '", chr(ch), "'" ] )
def write( self, aString ):
self._outputFile.write( aString )