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#!/usr/bin/env python
"""
Defines Block classes.
Permission to use, modify, and distribute this software is given under the
terms of the NumPy License. See http://scipy.org.
NO WARRANTY IS EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
Author: Pearu Peterson <pearu@cens.ioc.ee>
Created: May 2006
"""
__all__ = ['Block','Module','PythonModule','Interface',
'Subroutine','Function','Type']
import re
import sys
from readfortran import Line
from splitline import split2, string_replace_map
class Block:
classes = []
end_re = re.compile(r'\s*end\s*\Z', re.I)
def __init__(self, parent):
self.parent = parent
self.isfix77 = parent.isfix77
self.reader = parent.reader
self.get_item = parent.get_item
self.put_item = parent.put_item
self.lower = not self.reader.ispyf
self.content = []
self.name = None
def get_name(self):
if self.__class__ is Block: return '__MAIN__'
if self.name is None: return ''
return self.name
def __str__(self):
tab = ''
p = self.parent
while isinstance(p, Block):
tab += ' '
p = p.parent
name = self.get_name()
l=[tab+'begin '+self.__class__.__name__ +' '+ name]
for c in self.content:
l.append(str(c))
l.append(tab+'end '+self.__class__.__name__ +' '+ name)
return '\n'.join(l)
def isenditem(self, item):
line,sline = split2(item.get_line())
if sline: return False # end statement never contains strings
if self.__class__ is Block:
# MAIN block does not define start/end line conditions,
# so it should never end until all lines are read.
# However, sometimes F77 programs lack the PROGRAM statement,
# and here we fix that:
if self.isfix77:
m = self.end_re.match(line)
if m:
message = self.reader.format_message(\
'WARNING',
'assuming the end of undefined PROGRAM statement',
item.span[0],item.span[1])
print >> sys.stderr, message
i = Line('program UNDEFINED',(0,0),None,self.reader)
p = Program(self,Program.start_re.match(i.get_line()),i)
p.content.extend(self.content)
self.content[:] = [p]
return None
return False
m = self.end_re.match(line)
if not m: return False
# check if the block start name matches with the block end name
if m.groupdict().has_key('name'):
end_name = m.group('name')
if end_name: end_name = end_name.strip()
name = self.get_name()
if end_name and name != end_name:
message = self.reader.format_message(\
'WARNING',
'expected the end of %r block but got end of %r'\
% (name, end_name),
item.span[0],item.span[1])
print >> sys.stderr, message
return True
def isblock(self, item):
line = item.get_line()
for cls in self.classes:
m = cls.start_re.match(line)
if m:
subblock = cls(self, m, item)
self.content.append(subblock)
subblock.fill()
return True
return False
def fill(self):
end_flag = self.__class__ is Block
item = startitem = self.get_item()
while item is not None:
if isinstance(item, Line):
# handle end of a block
flag = self.isenditem(item)
if flag: # end of block
end_flag = True
break
if flag is None: # fixing the end of undefined start
item = self.get_item()
continue
# handle subblocks
if self.isblock(item):
item = self.get_item()
continue
# line contains something else
self.content.append(item)
item = self.get_item()
if not end_flag:
message = self.reader.format_message(\
'WARNING',
'failed to find the end of block',
self.item.span[0],self.item.span[1])
print >> sys.stderr, message
sys.stderr.flush()
return
class CodeBlock(Block):
def __init__(self, parent, start_re_match, item):
Block.__init__(self, parent)
self.name = start_re_match.group('name')
self.item = item
class Program(CodeBlock):
classes = []
start_re = re.compile(r'\s*program\s*((?P<name>\w+)|)', re.I)
end_re = re.compile(r'\s*end(\s*program(\s*(?P<name>\w+)|)|)\s*\Z', re.I)
class Module(CodeBlock):
classes = []
start_re = re.compile(r'\s*module\s*(?P<name>\w+)\s*\Z', re.I)
end_re = re.compile(r'\s*end(\s*module(\s*(?P<name>\w+)|)|)\s*\Z', re.I)
def __init__(self, parent, start_re_match, item):
Block.__init__(self, parent)
self.name = start_re_match.group('name')
self.item = item
class Interface(CodeBlock):
classes = []
start_re = re.compile(r'\s*interface(\s*(?P<name>\w+)|)', re.I)
end_re = re.compile(r'\s*end(\s*interface(\s*(?P<name>\w+)|)|)\s*\Z', re.I)
class PythonModule(CodeBlock):
classes = []
start_re = re.compile(r'\s*python\s*module\s*(?P<name>\w+)', re.I)
end_re = re.compile(r'\s*end(\s*python\s*module(\s*(?P<name>\w+)|)|)\s*\Z', re.I)
class Subroutine(CodeBlock):
classes = []
start_re = re.compile(r'\s*subroutine\s*(?P<name>\w+)', re.I)
end_re = re.compile(r'\s*end(\s*subroutine(\s*(?P<name>\w+)|)|)\s*\Z', re.I)
class Function(CodeBlock):
classes = []
start_re = re.compile(r'\s*(?P<prefix>[\w,\s=()]*)\s*function\s*(?P<name>\w+)', re.I)
end_re = re.compile(r'\s*end(\s*function(\s*(?P<name>\w+)|)|)\s*\Z')
class Type(CodeBlock):
classes = []
start_re = re.compile(r'\s*type(?!\s*\()(.*::|)\s*(?P<name>\w+)\s*\Z', re.I)
end_re = re.compile(r'\s*end(\s*type(\s*(?P<name>\w+)|)|)\s*\Z', re.I)
class StatementBlock(Block):
classes = []
def __init__(self, parent, start_re_match, item):
Block.__init__(self, parent)
self.item = item
def isenditem(self, item):
line,sline = split2(item.get_line())
if sline: return False # end statement never contains strings
m = self.end_re.match(line)
if not m: return False
# check if the block start name matches with the block end name
if m.groupdict().has_key('name'):
end_name = m.group('name')
if end_name: end_name = end_name.strip()
name = self.get_name()
if end_name and name != end_name:
message = self.reader.format_message(\
'WARNING',
'expected the end of %r block but got end of %r'\
% (name, end_name),
item.span[0],item.span[1])
print >> sys.stderr, message
return True
def fill(self):
item = self.get_item()
while item is not None:
if isinstance(item, Line):
# handle end of a block
flag = self.isenditem(item)
if flag: # end of block
break
# handle subblocks
if self.isblock(item):
item = self.get_item()
continue
# line contains something else
self.content.append(item)
item = self.get_item()
if item is None:
message = self.reader.format_message(\
'WARNING',
'failed to find the end of block',
self.item.span[0],self.item.span[1])
print >> sys.stderr, message
sys.stderr.flush()
return
class DoBlock(StatementBlock):
start_re = re.compile(r'\s*do\b\s*(?P<label>\d*)', re.I)
end_re = re.compile(r'\s*end\s*do(\s*(?P<name>.*)|)\s*\Z', re.I)
def __init__(self, parent, start_re_match, item):
StatementBlock.__init__(self, parent, start_re_match, item)
label = start_re_match.group('label').strip()
if label.endswith(':'): label = label[:-1].strip()
self.endlabel = label
self.name = item.label
def isenditem(self, item):
if self.endlabel:
if item.label==self.endlabel:
# item may contain computational statemets
self.content.append(item)
# the same item label may be used for different block ends
self.put_item(item)
return True
else:
return StatementBlock.isenditem(self, item)
return False
class IfThenBlock(StatementBlock):
start_re = re.compile(r'\s*if\b.*?\bthen\s*\Z', re.I)
#start_re = re.compile(r'\s*if\b', re.I)
end_re = re.compile(r'\s*end\s*if(\s*(?P<name>.*)|)\s*\Z', re.I)
def __init__(self, parent, start_re_match, item):
StatementBlock.__init__(self, parent, start_re_match, item)
self.name = item.label
# Initialize classes lists
basic_blocks = [Program,PythonModule,Module,Interface,Subroutine,Function,Type]
stmt_blocks = [DoBlock,IfThenBlock]
Block.classes.extend(basic_blocks + stmt_blocks)
Module.classes.extend(Block.classes[1:])
PythonModule.classes.extend(Module.classes)
Interface.classes.extend(Block.classes[1:])
Subroutine.classes.extend(Block.classes[1:])
Function.classes.extend(Subroutine.classes)
Type.classes.extend(Block.classes[3:])
StatementBlock.classes.extend(stmt_blocks)
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