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#
# $Endicor: ImportExport.py,v 1.3 1999/04/27 17:25:44 tsarna Exp $
#
# Copyright (c) 1998-1999 Endicor Technologies, Inc.
# All rights reserved. Written by Ty Sarna <tsarna@endicor.com>
# Modified by Shane Hathaway. (April 2000)
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
"""Import and Export data from TinyTablePlus to human readable CSV-type text"""
import string, token, tokenize, cStringIO, Missing
from types import *
FormatError = "Invalid Data Format"
class ImportDataState:
def __init__(self):
self.rows = []
self.row = []
self.value = Missing.Value
self.seenvalue = self.sign = 0
self.lasttok = tokenize.ENDMARKER
def token(self, t, s, src, erc, l):
estr = "at line %d column %d" % src
signerr = "<strong>Already have sign %s</strong>" % estr
invtok = "<strong>invalid token %s %s</strong>" % (`s`, estr)
if t == token.OP:
if s == ',':
self.row.append(self.value)
self.value = Missing.Value
self.seenvalue = self.sign = 0
elif s == '+':
if self.seenvalue or self.sign:
raise FormatError, signerr
self.sign = 1
elif s == '-':
if self.seenvalue or self.sign:
raise FormatError, signerr
self.sign = -1
else:
raise FormatError, invtok
elif t == token.NAME:
if string.upper(s) in ('NONE', 'NULL'):
if self.seenvalue or self.sign:
raise FormatError, invtok
self.value = Missing.Value
self.seenvalue = 1
else:
if self.seenvalue:
if type(self.value) == StringType:
self.value = self.value + ' ' + s
else:
raise FormatError, invtok
else:
self.value = s
self.seenvalue = 1
elif t == token.STRING:
if self.seenvalue or self.sign:
raise FormatError, invtok
self.value = eval(s)
self.seenvalue = 1
elif t == token.NUMBER:
if self.seenvalue:
raise FormatError, invtok
self.value = eval(s)
if self.sign < 0:
self.value = -self.value
self.seenvalue = 1
elif t in (token.NEWLINE, tokenize.ENDMARKER):
if t == tokenize.NEWLINE or self.lasttok != token.NEWLINE:
self.row.append(self.value)
self.seenvalue = self.sign = 0
self.value = Missing.Value
self.rows.append(self.row)
self.row = []
elif t in (tokenize.COMMENT, tokenize.NL):
pass
else:
raise FormatError, invtok
self.lasttok = t
def ImportData(s):
if len(s) < 1:
# Patch by Shane, April 2000 - Check for empty data set.
return []
f = cStringIO.StringIO(s)
i = ImportDataState()
tokenize.tokenize(f.readline, i.token)
return i.rows
# translate specialcharacter to escaped form
cval = {
'\\' : '\\\\',
'\"' : '\\\"',
'\a' : '\\a',
'\b' : '\\b',
'\f' : '\\f',
'\n' : '\\n',
'\r' : '\\r',
'\t' : '\\t',
'\v' : '\\v'
}
def ExportVal(data):
t = type(data)
if data is Missing.Value:
return "NULL"
elif data is Missing.Value:
return "NULL"
elif t in (IntType, FloatType, LongType):
return str(data)
elif t is StringType:
s = '"'
for c in data:
if cval.has_key(c):
s = s + cval[c]
elif ord(c) <= 31 or ord(c) >= 127:
s = s + '\\%03o' % ord(c)
else:
s = s + c
return s + '"'
else:
return '"' + str(data) + '"'
def ExportData(data):
return string.join(
map(
lambda row: string.join(
map(ExportVal, row),
', '
),
data
),
'\n'
)
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