mirror of
https://github.com/psycopg/psycopg2.git
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121 lines
4.1 KiB
Python
121 lines
4.1 KiB
Python
# -*- python -*-
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#
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# Copyright (C) 2001-2003 Federico Di Gregorio <fog@debian.org>
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#
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# This file is part of the psycopg module.
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#
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# psycopg2 is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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# License for more details.
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#
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# this a little script that analyze a file with (TYPE, NUMBER) tuples
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# and write out C code ready for inclusion in psycopg. the generated
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# code defines the DBAPITypeObject fundamental types and warns for
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# undefined types.
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import sys, os, string, copy
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from string import split, join, strip
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# here is the list of the foundamental types we want to import from
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# postgresql header files
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basic_types = (['NUMBER', ['INT8', 'INT4', 'INT2', 'FLOAT8', 'FLOAT4',
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'NUMERIC']],
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['LONGINTEGER', ['INT8']],
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['INTEGER', ['INT4', 'INT2']],
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['FLOAT', ['FLOAT8', 'FLOAT4']],
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['DECIMAL', ['NUMERIC']],
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['UNICODE', ['NAME', 'CHAR', 'TEXT', 'BPCHAR',
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'VARCHAR']],
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['STRING', ['NAME', 'CHAR', 'TEXT', 'BPCHAR',
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'VARCHAR']],
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['BOOLEAN', ['BOOL']],
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['DATETIME', ['TIMESTAMP', 'TIMESTAMPTZ',
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'TINTERVAL', 'INTERVAL']],
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['TIME', ['TIME', 'TIMETZ']],
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['DATE', ['DATE']],
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['INTERVAL', ['TINTERVAL', 'INTERVAL']],
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['BINARY', ['BYTEA']],
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['ROWID', ['OID']])
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# unfortunately we don't have a nice way to extract array information
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# from postgresql headers; we'll have to do it hard-coding :/
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array_types = (['LONGINTEGER', [1016]],
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['INTEGER', [1005, 1006, 1007]],
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['FLOAT', [1017, 1021, 1022]],
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['DECIMAL', [1231]],
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['UNICODE', [1002, 1003, 1009, 1014, 1015]],
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['STRING', [1002, 1003, 1009, 1014, 1015]],
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['BOOLEAN', [1000]],
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['DATETIME', [1115, 1185]],
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['TIME', [1183, 1270]],
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['DATE', [1182]],
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['INTERVAL', [1187]],
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['BINARY', [1001]],
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['ROWID', [1028, 1013]])
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# this is the header used to compile the data in the C module
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HEADER = """
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typecastObject_initlist typecast_builtins[] = {
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"""
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# then comes the footer
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FOOTER = """ {NULL, NULL, NULL, NULL}\n};\n"""
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# useful error reporting function
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def error(msg):
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"""Report an error on stderr."""
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sys.stderr.write(msg+'\n')
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# read couples from stdin and build list
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read_types = []
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for l in sys.stdin.readlines():
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oid, val = split(l)
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read_types.append((strip(oid)[:-3], strip(val)))
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# look for the wanted types in the read touples
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found_types = {}
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for t in basic_types:
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k = t[0]
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found_types[k] = []
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for v in t[1]:
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found = filter(lambda x, y=v: x[0] == y, read_types)
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if len(found) == 0:
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error(v+': value not found')
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elif len(found) > 1:
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error(v+': too many values')
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else:
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found_types[k].append(int(found[0][1]))
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# now outputs to stdout the right C-style definitions
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stypes = "" ; sstruct = ""
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for t in basic_types:
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k = t[0]
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s = str(found_types[k])
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s = '{' + s[1:-1] + ', 0}'
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stypes = stypes + ('static long int typecast_%s_types[] = %s;\n' % (k, s))
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sstruct += (' {"%s", typecast_%s_types, typecast_%s_cast, NULL},\n'
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% (k, k, k))
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for t in array_types:
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kt = t[0]
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ka = t[0]+'ARRAY'
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s = str(t[1])
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s = '{' + s[1:-1] + ', 0}'
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stypes = stypes + ('static long int typecast_%s_types[] = %s;\n' % (ka, s))
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sstruct += (' {"%s", typecast_%s_types, typecast_%s_cast, "%s"},\n'
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% (ka, ka, ka, kt))
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sstruct = HEADER + sstruct + FOOTER
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print stypes
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print sstruct
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