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# -*- python -*-
#
# Copyright (C) 2001 Federico Di Gregorio <fog@debian.org>
#
# This file is part of the psycopg module.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2,
# or (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# this a little script that analyze a file with (TYPE, NUMBER) tuples
# and write out C code ready for inclusion in psycopg. the generated
# code defines the DBAPITypeObject fundamental types and warns for
# undefined types.
import sys, os, string, copy
from string import split, join, strip
# here is the list of the foundamental types we want to import from
# postgresql header files
basic_types = (['NUMBER', ['INT8', 'INT4', 'INT2', 'FLOAT8', 'FLOAT4',
'NUMERIC']],
['LONGINTEGER', ['INT8']],
['INTEGER', ['INT4', 'INT2']],
['FLOAT', ['FLOAT8', 'FLOAT4', 'NUMERIC']],
['STRING', ['NAME', 'CHAR', 'TEXT', 'BPCHAR',
'VARCHAR']],
['BOOLEAN', ['BOOL']],
['DATETIME', ['DATE', 'TIME', 'TIMETZ',
'TIMESTAMP', 'TIMESTAMPTZ',
'TINTERVAL', 'INTERVAL']],
['TIME', ['TIME', 'TIMETZ']],
['DATE', ['DATE', 'TIMESTAMP', 'TIMESTAMPTZ']],
['INTERVAL', ['TINTERVAL', 'INTERVAL']],
['BINARY', ['BYTEA']],
['ROWID', ['OID']])
# this is the header used to compile the data in the C module
HEADER = """
psyco_DBAPIInitList psyco_cast_types[] = {
"""
# then comes the footer
FOOTER = """ {NULL, NULL, NULL}\n};\n"""
# usefull error reporting function
def error(msg):
"""Report an error on stderr."""
sys.stderr.write(msg+'\n')
# read couples from stdin and build list
read_types = []
for l in sys.stdin.readlines():
oid, val = split(l)
read_types.append((strip(oid)[:-3], strip(val)))
# look for the wanted types in the read touples
found_types = {}
for t in basic_types:
k = t[0]
found_types[k] = []
for v in t[1]:
found = filter(lambda x, y=v: x[0] == y, read_types)
if len(found) == 0:
error(v+': value not found')
elif len(found) > 1:
error(v+': too many values')
else:
found_types[k].append(int(found[0][1]))
# now outputs to stdout the right C-style definitions
stypes = "" ; sstruct = ""
for t in basic_types:
k = t[0]
s = str(found_types[k])
s = '{' + s[1:-1] + ', 0}'
stypes = stypes + ('static int psyco_cast_types_%s[] = %s;\n' % (k, s))
sstruct = sstruct + (' {"%s", psyco_cast_types_%s, psyco_%s_cast},\n'
% (k, k, k))
sstruct = HEADER + sstruct + FOOTER
print stypes
print sstruct
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