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delete cloud_PrettyPrint.py cloud_sxp.py which are not used

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Anthony Xu 2010-11-17 23:29:51 -08:00
parent 829d7482b3
commit aca45d68d3
2 changed files with 0 additions and 1087 deletions
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324
python/lib/cloud_PrettyPrint.py
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@ -1,324 +0,0 @@
#============================================================================
# This library is free software; you can redistribute it and/or
# modify it under the terms of version 2.1 of the GNU Lesser General Public
# License as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#============================================================================
# Copyright (C) 2004, 2005 Mike Wray <mike.wray@hp.com>
# Copyright (C) 2005 XenSource Ltd
#============================================================================
"""General pretty-printer, including support for SXP.
"""
import sys
import types
import StringIO
#from xen.xend import sxp
import cloud_sxp as sxp
class PrettyItem:
def __init__(self, width):
self.width = width
def insert(self, block):
block.addtoline(self)
def get_width(self):
return self.width
def output(self, _):
print '***PrettyItem>output>', self
pass
def prettyprint(self, _):
print '***PrettyItem>prettyprint>', self
return self.width
class PrettyString(PrettyItem):
def __init__(self, x):
PrettyItem.__init__(self, len(x))
self.value = x
def output(self, out):
out.write(self.value)
def prettyprint(self, line):
line.output(self)
def show(self, out):
print >> out, ("(string (width %d) '%s')" % (self.width, self.value))
class PrettySpace(PrettyItem):
def output(self, out):
out.write(' ' * self.width)
def prettyprint(self, line):
line.output(self)
def show(self, out):
print >> out, ("(space (width %d))" % self.width)
class PrettyBreak(PrettyItem):
def __init__(self, width, indent):
PrettyItem.__init__(self, width)
self.indent = indent
self.space = 0
self.active = 0
def output(self, out):
out.write(' ' * self.width)
def prettyprint(self, line):
if line.breaks(self.space):
self.active = 1
line.newline(self.indent)
else:
line.output(self)
def show(self, out):
print >> out, ("(break (width %d) (indent %d) (space %d) (active %d))"
% (self.width, self.indent, self.space, self.active))
class PrettyNewline(PrettySpace):
def insert(self, block):
block.newline()
block.addtoline(self)
def prettyprint(self, line):
line.newline(0)
line.output(self)
def show(self, out):
print >> out, ("(nl (width %d))" % self.width)
class PrettyLine(PrettyItem):
def __init__(self):
PrettyItem.__init__(self, 0)
self.content = []
def write(self, x):
self.content.append(x)
def end(self):
width = 0
lastwidth = 0
lastbreak = None
for x in self.content:
if isinstance(x, PrettyBreak):
if lastbreak:
lastbreak.space = (width - lastwidth)
lastbreak = x
lastwidth = width
width += x.get_width()
if lastbreak:
lastbreak.space = (width - lastwidth)
self.width = width
def prettyprint(self, line):
for x in self.content:
x.prettyprint(line)
def show(self, out):
print >> out, '(LINE (width %d)' % self.width
for x in self.content:
x.show(out)
print >> out, ')'
class PrettyBlock(PrettyItem):
def __init__(self, all=0, parent=None):
PrettyItem.__init__(self, 0)
self.lines = []
self.parent = parent
self.indent = 0
self.all = all
self.broken = 0
self.newline()
def add(self, item):
item.insert(self)
def end(self):
self.width = 0
for l in self.lines:
l.end()
if self.width < l.width:
self.width = l.width
def breaks(self, _):
return self.all and self.broken
def newline(self):
self.lines.append(PrettyLine())
def addtoline(self, x):
self.lines[-1].write(x)
def prettyprint(self, line):
self.indent = line.used
line.block = self
if not line.fits(self.width):
self.broken = 1
for l in self.lines:
l.prettyprint(line)
line.block = self.parent
def show(self, out):
print >> out, ('(BLOCK (width %d) (indent %d) (all %d) (broken %d)' %
(self.width, self.indent, self.all, self.broken))
for l in self.lines:
l.show(out)
print >> out, ')'
class Line:
def __init__(self, out, width):
self.block = None
self.out = out
self.width = width
self.used = 0
self.space = self.width
def newline(self, indent):
indent += self.block.indent
self.out.write('\n')
self.out.write(' ' * indent)
self.used = indent
self.space = self.width - self.used
def fits(self, n):
return self.space - n >= 0
def breaks(self, n):
return self.block.breaks(n) or not self.fits(n)
def output(self, x):
n = x.get_width()
self.space -= n
self.used += n
if self.space < 0:
self.space = 0
x.output(self.out)
class PrettyPrinter:
"""A prettyprinter based on what I remember of Derek Oppen's
prettyprint algorithm from TOPLAS way back.
"""
def __init__(self, width=40):
self.width = width
self.block = None
self.top = None
def write(self, x):
self.block.add(PrettyString(x))
def add(self, item):
self.block.add(item)
def addbreak(self, width=1, indent=4):
self.add(PrettyBreak(width, indent))
def addspace(self, width=1):
self.add(PrettySpace(width))
def addnl(self, indent=0):
self.add(PrettyNewline(indent))
def begin(self, all=0):
block = PrettyBlock(all=all, parent=self.block)
self.block = block
def end(self):
self.block.end()
if self.block.parent:
self.block.parent.add(self.block)
else:
self.top = self.block
self.block = self.block.parent
def prettyprint(self, out=sys.stdout):
self.top.prettyprint(Line(out, self.width))
class SXPPrettyPrinter(PrettyPrinter):
"""An SXP prettyprinter.
"""
def pstring(self, x):
io = StringIO.StringIO()
sxp.show(x, out=io)
io.seek(0)
val = io.getvalue()
io.close()
return val
def pprint(self, l):
if isinstance(l, types.ListType):
self.begin(all=1)
self.write('(')
i = 0
for x in l:
if(i): self.addbreak()
self.pprint(x)
i += 1
self.addbreak(width=0, indent=0)
self.write(')')
self.end()
else:
self.write(self.pstring(l))
def prettyprint(sxpr, out=sys.stdout, width=80):
"""Prettyprint an SXP form.
sxpr s-expression
out destination
width maximum output width
"""
if isinstance(sxpr, types.ListType):
pp = SXPPrettyPrinter(width=width)
pp.pprint(sxpr)
pp.prettyprint(out=out)
else:
sxp.show(sxpr, out=out)
print >> out
def prettyprintstring(sxpr, width=80):
"""Prettyprint an SXP form to a string.
sxpr s-expression
width maximum output width
"""
io = StringIO.StringIO()
prettyprint(sxpr, out=io, width=width)
io.seek(0)
val = io.getvalue()
io.close()
return val
def main():
pin = sxp.Parser()
while 1:
buf = sys.stdin.read(100)
pin.input(buf)
if buf == '': break
l = pin.get_val()
prettyprint(l, width=80)
if __name__ == "__main__":
main()

763
python/lib/cloud_sxp.py
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#!/usr/bin/env python
#============================================================================
# This library is free software; you can redistribute it and/or
# modify it under the terms of version 2.1 of the GNU Lesser General Public
# License as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#============================================================================
# Copyright (C) 2004, 2005 Mike Wray <mike.wray@hp.com>
#============================================================================
"""
Input-driven parsing for s-expression (sxp) format.
Create a parser: pin = Parser();
Then call pin.input(buf) with your input.
Call pin.input_eof() when done.
Use pin.read() to see if a value has been parsed, pin.get_val()
to get a parsed value. You can call ready and get_val at any time -
you don't have to wait until after calling input_eof.
"""
from __future__ import generators
import sys
import types
import errno
import string
from StringIO import StringIO
__all__ = [
"mime_type",
"ParseError",
"Parser",
"atomp",
"show",
"show_xml",
"elementp",
"name",
"attributes",
"attribute",
"children",
"child",
"child_at",
"child0",
"child1",
"child2",
"child3",
"child4",
"child_value",
"has_id",
"with_id",
"child_with_id",
"elements",
"merge",
"to_string",
"from_string",
"all_from_string",
"parse",
]
mime_type = "application/sxp"
escapes = {
'a': '\a',
'b': '\b',
't': '\t',
'n': '\n',
'v': '\v',
'f': '\f',
'r': '\r',
'\\': '\\',
'\'': '\'',
'\"': '\"'}
k_list_open = "("
k_list_close = ")"
k_attr_open = "@"
k_eval = "!"
escapes_rev = {}
for k in escapes:
escapes_rev[escapes[k]] = k
class ParseError(StandardError):
def __init__(self, parser, value):
self.parser = parser
self.value = value
def __str__(self):
return self.value
class ParserState:
def __init__(self, fn, parent=None):
self.parent = parent
self.buf = ''
self.val = []
self.delim = None
self.fn = fn
def push(self, fn):
return ParserState(fn, parent=self)
class Parser:
def __init__(self):
self.error = sys.stderr
self.reset()
def reset(self):
self.val = []
self.eof = 0
self.err = 0
self.line_no = 0
self.char_no = 0
self.state = None
def push_state(self, fn):
self.state = self.state.push(fn)
def pop_state(self):
val = self.state
self.state = self.state.parent
if self.state and self.state.fn == self.state_start:
# Return to start state - produce the value.
self.val += self.state.val
self.state.val = []
return val
def in_class(self, c, s):
return s.find(c) >= 0
def in_space_class(self, c):
return self.in_class(c, ' \t\n\v\f\r')
def is_separator(self, c):
return self.in_class(c, '{}()<>[]!;')
def in_comment_class(self, c):
return self.in_class(c, '#')
def in_string_quote_class(self, c):
return self.in_class(c, '"\'')
def in_printable_class(self, c):
return self.in_class(c, string.printable)
def set_error_stream(self, error):
self.error = error
def has_error(self):
return self.err > 0
def at_eof(self):
return self.eof
def input_eof(self):
self.eof = 1
self.input_char(-1)
def input(self, buf):
if not buf or len(buf) == 0:
self.input_eof()
else:
for c in buf:
self.input_char(c)
def input_char(self, c):
if self.at_eof():
pass
elif c == '\n':
self.line_no += 1
self.char_no = 0
else:
self.char_no += 1
if self.state is None:
self.begin_start(None)
self.state.fn(c)
def ready(self):
return len(self.val) > 0
def get_val(self):
v = self.val[0]
self.val = self.val[1:]
return v
def get_all(self):
return self.val
def begin_start(self, c):
self.state = ParserState(self.state_start)
def end_start(self):
self.val += self.state.val
self.pop_state()
def state_start(self, c):
if self.at_eof():
self.end_start()
elif self.in_space_class(c):
pass
elif self.in_comment_class(c):
self.begin_comment(c)
elif c == k_list_open:
self.begin_list(c)
elif c == k_list_close:
raise ParseError(self, "syntax error: "+c)
elif self.in_string_quote_class(c):
self.begin_string(c)
elif self.in_printable_class(c):
self.begin_atom(c)
elif c == chr(4):
# ctrl-D, EOT: end-of-text.
self.input_eof()
else:
raise ParseError(self, "invalid character: code %d" % ord(c))
def begin_comment(self, c):
self.push_state(self.state_comment)
self.state.buf += c
def end_comment(self):
self.pop_state()
def state_comment(self, c):
if c == '\n' or self.at_eof():
self.end_comment()
else:
self.state.buf += c
def begin_string(self, c):
self.push_state(self.state_string)
self.state.delim = c
def end_string(self):
val = self.state.buf
self.state.parent.val.append(val)
self.pop_state()
def state_string(self, c):
if self.at_eof():
raise ParseError(self, "unexpected EOF")
elif c == self.state.delim:
self.end_string()
elif c == '\\':
self.push_state(self.state_escape)
else:
self.state.buf += c
def state_escape(self, c):
if self.at_eof():
raise ParseError(self, "unexpected EOF")
d = escapes.get(c)
if d:
self.state.parent.buf += d
self.pop_state()
elif c == 'x':
self.state.fn = self.state_hex
self.state.val = 0
elif c in string.octdigits:
self.state.fn = self.state_octal
self.state.val = 0
self.input_char(c)
else:
# ignore escape if it doesn't match anything we know
self.state.parent.buf += '\\'
self.pop_state()
def state_octal(self, c):
def octaldigit(c):
self.state.val *= 8
self.state.val += ord(c) - ord('0')
self.state.buf += c
if self.state.val < 0 or self.state.val > 0xff:
raise ParseError(self, "invalid octal escape: out of range " + self.state.buf)
if len(self.state.buf) == 3:
octaldone()
def octaldone():
d = chr(self.state.val)
self.state.parent.buf += d
self.pop_state()
if self.at_eof():
raise ParseError(self, "unexpected EOF")
elif '0' <= c <= '7':
octaldigit(c)
elif len(self.state.buf):
octaldone()
self.input_char(c)
def state_hex(self, c):
def hexdone():
d = chr(self.state.val)
self.state.parent.buf += d
self.pop_state()
def hexdigit(c, d):
self.state.val *= 16
self.state.val += ord(c) - ord(d)
self.state.buf += c
if self.state.val < 0 or self.state.val > 0xff:
raise ParseError(self, "invalid hex escape: out of range " + self.state.buf)
if len(self.state.buf) == 2:
hexdone()
if self.at_eof():
raise ParseError(self, "unexpected EOF")
elif '0' <= c <= '9':
hexdigit(c, '0')
elif 'A' <= c <= 'F':
hexdigit(c, 'A')
elif 'a' <= c <= 'f':
hexdigit(c, 'a')
elif len(buf):
hexdone()
self.input_char(c)
def begin_atom(self, c):
self.push_state(self.state_atom)
self.state.buf = c
def end_atom(self):
val = self.state.buf
self.state.parent.val.append(val)
self.pop_state()
def state_atom(self, c):
if self.at_eof():
self.end_atom()
elif (self.is_separator(c) or
self.in_space_class(c) or
self.in_comment_class(c)):
self.end_atom()
self.input_char(c)
else:
self.state.buf += c
def begin_list(self, c):
self.push_state(self.state_list)
def end_list(self):
val = self.state.val
self.state.parent.val.append(val)
self.pop_state()
def state_list(self, c):
if self.at_eof():
raise ParseError(self, "unexpected EOF")
elif c == k_list_close:
self.end_list()
else:
self.state_start(c)
def atomp(sxpr):
"""Check if an sxpr is an atom.
"""
if sxpr.isalnum() or sxpr == '@':
return 1
for c in sxpr:
if c in string.whitespace: return 0
if c in '"\'\\(){}[]<>$#&%^': return 0
if c in string.ascii_letters: continue
if c in string.digits: continue
if c in '.-_:/~': continue
return 0
return 1
def show(sxpr, out=sys.stdout):
"""Print an sxpr in bracketed (lisp-style) syntax.
"""
if isinstance(sxpr, (types.ListType, types.TupleType)):
out.write(k_list_open)
i = 0
for x in sxpr:
if i: out.write(' ')
show(x, out)
i += 1
out.write(k_list_close)
elif isinstance(sxpr, (types.IntType, types.FloatType)):
out.write(str(sxpr))
elif isinstance(sxpr, types.StringType) and atomp(sxpr):
out.write(sxpr)
else:
out.write(repr(str(sxpr)))
def show_xml(sxpr, out=sys.stdout):
"""Print an sxpr in XML syntax.
"""
if isinstance(sxpr, (types.ListType, types.TupleType)):
element = name(sxpr)
out.write('<%s' % element)
for attr in attributes(sxpr):
out.write(' %s=%s' % (attr[0], attr[1]))
out.write('>')
i = 0
for x in children(sxpr):
if i: out.write(' ')
show_xml(x, out)
i += 1
out.write('</%s>' % element)
elif isinstance(sxpr, types.StringType) and atomp(sxpr):
out.write(sxpr)
else:
out.write(str(sxpr))
def elementp(sxpr, elt=None):
"""Check if an sxpr is an element of the given type.
sxpr sxpr
elt element type
"""
return (isinstance(sxpr, (types.ListType, types.TupleType))
and len(sxpr)
and (None == elt or sxpr[0] == elt))
def name(sxpr):
"""Get the element name of an sxpr.
If the sxpr is not an element (i.e. it's an atomic value) its name
is None.
sxpr
returns name (None if not an element).
"""
val = None
if isinstance(sxpr, types.StringType):
val = sxpr
elif isinstance(sxpr, (types.ListType, types.TupleType)) and len(sxpr):
val = sxpr[0]
return val
def attributes(sxpr):
"""Get the attribute list of an sxpr.
sxpr
returns attribute list
"""
val = []
if isinstance(sxpr, (types.ListType, types.TupleType)) and len(sxpr) > 1:
attr = sxpr[1]
if elementp(attr, k_attr_open):
val = attr[1:]
return val
def attribute(sxpr, key, val=None):
"""Get an attribute of an sxpr.
sxpr sxpr
key attribute key
val default value (default None)
returns attribute value
"""
for x in attributes(sxpr):
if x[0] == key:
val = x[1]
break
return val
def children(sxpr, elt=None):
"""Get children of an sxpr.
sxpr sxpr
elt optional element type to filter by
returns children (filtered by elt if specified)
"""
val = []
if isinstance(sxpr, (types.ListType, types.TupleType)) and len(sxpr) > 1:
i = 1
x = sxpr[i]
if elementp(x, k_attr_open):
i += 1
val = sxpr[i : ]
if elt:
def iselt(x):
return elementp(x, elt)
val = filter(iselt, val)
return val
def child(sxpr, elt, val=None):
"""Get the first child of the given element type.
sxpr sxpr
elt element type
val default value
"""
for x in children(sxpr):
if elementp(x, elt):
val = x
break
return val
def child_at(sxpr, index, val=None):
"""Get the child at the given index (zero-based).
sxpr sxpr
index index
val default value
"""
kids = children(sxpr)
if len(kids) > index:
val = kids[index]
return val
def child0(sxpr, val=None):
"""Get the zeroth child.
"""
return child_at(sxpr, 0, val)
def child1(sxpr, val=None):
"""Get the first child.
"""
return child_at(sxpr, 1, val)
def child2(sxpr, val=None):
"""Get the second child.
"""
return child_at(sxpr, 2, val)
def child3(sxpr, val=None):
"""Get the third child.
"""
return child_at(sxpr, 3, val)
def child4(sxpr, val=None):
"""Get the fourth child.
"""
return child_at(sxpr, 4, val)
def child_value(sxpr, elt, val=None):
"""Get the value of the first child of the given element type.
Assumes the child has an atomic value.
sxpr sxpr
elt element type
val default value
"""
kid = child(sxpr, elt)
if kid:
val = child_at(kid, 0, val)
return val
def has_id(sxpr, id):
"""Test if an s-expression has a given id.
"""
return attribute(sxpr, 'id') == id
def with_id(sxpr, id, val=None):
"""Find the first s-expression with a given id, at any depth.
sxpr s-exp or list
id id
val value if not found (default None)
return s-exp or val
"""
if isinstance(sxpr, (types.ListType, types.TupleType)):
for n in sxpr:
if has_id(n, id):
val = n
break
v = with_id(n, id)
if v is None: continue
val = v
break
return val
def child_with_id(sxpr, id, val=None):
"""Find the first child with a given id.
sxpr s-exp or list
id id
val value if not found (default None)
return s-exp or val
"""
if isinstance(sxpr, (types.ListType, types.TupleType)):
for n in sxpr:
if has_id(n, id):
val = n
break
return val
def elements(sxpr, ctxt=None):
"""Generate elements (at any depth).
Visit elements in pre-order.
Values generated are (node, context)
The context is None if there is no parent, otherwise
(index, parent, context) where index is the node's index w.r.t its parent,
and context is the parent's context.
sxpr s-exp
returns generator
"""
yield (sxpr, ctxt)
i = 0
for n in children(sxpr):
if isinstance(n, (types.ListType, types.TupleType)):
# Calling elements() recursively does not generate recursively,
# it just returns a generator object. So we must iterate over it.
for v in elements(n, (i, sxpr, ctxt)):
yield v
i += 1
def merge(s1, s2):
"""Merge sxprs s1 and s2.
Returns an sxpr containing all the fields from s1 and s2, with
entries in s1 overriding s2. Recursively merges fields.
@param s1 sxpr
@param s2 sxpr
@return merged sxpr
"""
if s1 is None:
val = s2
elif s2 is None:
val = s1
elif elementp(s1):
name1 = name(s1)
(m1, v1) = child_map(s1)
(m2, v2) = child_map(s2)
val = [name1]
for (k1, f1) in m1.items():
merge_list(val, f1, m2.get(k1, []))
for (k2, f2) in m2.items():
if k2 in m1: continue
val.extend(f2)
val.extend(v1)
else:
val = s1
return val
def merge_list(sxpr, l1, l2):
"""Merge element lists l1 and l2 into sxpr.
The lists l1 and l2 are all element with the same name.
Values from l1 are merged with values in l2 and stored in sxpr.
If one list is longer than the other the excess values are used
as they are.
@param sxpr to merge into
@param l1 sxpr list
@param l2 sxpr list
@return modified sxpr
"""
n1 = len(l1)
n2 = len(l2)
nmin = min(n1, n2)
for i in range(0, nmin):
sxpr.append(merge(l1[i], l2[i]))
for i in range(nmin, n1):
sxpr.append(l1[i])
for i in range(nmin, n2):
sxpr.append(l2[i])
return sxpr
def child_map(sxpr):
"""Get a dict of the elements in sxpr and a list of its values.
The dict maps element name to the list of elements with that name,
and the list is the non-element children.
@param sxpr
@return (dict, list)
"""
m = {}
v = []
for x in children(sxpr):
if elementp(x):
n = name(x)
l = m.get(n, [])
l.append(x)
m[n] = l
else:
v.append(x)
return (m, v)
def to_string(sxpr):
"""Convert an sxpr to a string.
sxpr sxpr
returns string
"""
io = StringIO()
show(sxpr, io)
io.seek(0)
val = io.getvalue()
io.close()
return val
def from_string(s):
"""Create an sxpr by parsing a string.
s string
returns sxpr
"""
if s == '':
return []
io = StringIO(s)
vals = parse(io)
if vals is []:
return None
else:
return vals[0]
def all_from_string(s):
"""Create an sxpr list by parsing a string.
s string
returns sxpr list
"""
io = StringIO(s)
vals = parse(io)
return vals
def parse(io):
"""Completely parse all input from 'io'.
io input file object
returns list of values, None if incomplete
raises ParseError on parse error
"""
pin = Parser()
while 1:
buf = io.readline()
pin.input(buf)
if len(buf) == 0:
break
if pin.ready():
val = pin.get_all()
else:
val = None
return val
if __name__ == '__main__':
print ">main"
pin = Parser()
while 1:
buf = sys.stdin.read(1024)
#buf = sys.stdin.readline()
pin.input(buf)
while pin.ready():
val = pin.get_val()
print
print '****** val=', val
if len(buf) == 0:
break