"""Parse sys/errno.h and Errors.h and create Estr resource"""

import re

import string

from Carbon import Res

import os

READ = 1

WRITE = 2

smAllScripts = -3

ERRNO_PROG="#define[ \t]+" \

                   "([A-Z0-9a-z_]+)" \

                   "[ \t]+" \

                   "([0-9]+)" \

                   "[ \t]*/\*[ \t]*" \

                   "(.*)" \

                   "[ \t]*\*/"

ERRORS_PROG="[ \t]*" \

                        "([A-Z0-9a-z_]+)" \

                        "[ \t]*=[ \t]*" \

                        "([-0-9]+)" \

                        "[, \t]*/\*[ \t]*" \

                        "(.*)" \

                        "[ \t]*\*/"

ERRORS_PROG_2="[ \t]*" \

                        "([A-Z0-9a-z_]+)" \

                        "[ \t]*=[ \t]*" \

                        "([-0-9]+)" \

                        "[, \t]*"

def Pstring(str):

    if len(str) > 255:

        raise ValueError, 'String too large'

    return chr(len(str))+str

def writeestr(dst, edict):

    """Create Estr resource file given a dictionary of errors."""

    os.unlink(dst.as_pathname())

    Res.FSpCreateResFile(dst, 'RSED', 'rsrc', smAllScripts)

    output = Res.FSpOpenResFile(dst, WRITE)

    Res.UseResFile(output)

    for num in edict.keys():

        res = Res.Resource(Pstring(edict[num][0]))

        res.AddResource('Estr', num, '')

        res.WriteResource()

    Res.CloseResFile(output)

def writepython(fp, dict):

    k = dict.keys()

    k.sort()

    for i in k:

        fp.write("%s\t=\t%d\t#%s\n"%(dict[i][1], i, dict[i][0]))

def parse_errno_h(fp, dict):

    errno_prog = re.compile(ERRNO_PROG)

    for line in fp.readlines():

        m = errno_prog.match(line)

        if m:

            number = string.atoi(m.group(2))

            name = m.group(1)

            desc = string.strip(m.group(3))

            if not dict.has_key(number):

                dict[number] = desc, name

            else:

                print 'DUPLICATE', number

                print '\t', dict[number]

                print '\t', (desc, name)

def parse_errors_h(fp, dict):

    errno_prog = re.compile(ERRORS_PROG)

    errno_prog_2 = re.compile(ERRORS_PROG_2)

    for line in fp.readlines():

        match = 0

        m = errno_prog.match(line)

        m2 = errno_prog_2.match(line)

        if m:

            number = string.atoi(m.group(2))

            name = m.group(1)

            desc = string.strip(m.group(3))

            match=1

        elif m2:

            number = string.atoi(m2.group(2))

            name = m2.group(1)

            desc = name

            match=1

        if match:

            if number > 0: continue

            if not dict.has_key(number):

                dict[number] = desc, name

            else:

                print 'DUPLICATE', number

                print '\t', dict[number]

                print '\t', (desc, name)

                if len(desc) > len(dict[number][0]):

                    print 'Pick second one'

                    dict[number] = desc, name

def main():

    dict = {}

    pathname = EasyDialogs.AskFileForOpen(message="Where is GUSI sys/errno.h?")

    if pathname:

        fp = open(pathname)

        parse_errno_h(fp, dict)

        fp.close()

    pathname = EasyDialogs.AskFileForOpen(message="Select cerrno (MSL) or cancel")

    if pathname:

        fp = open(pathname)

        parse_errno_h(fp, dict)

        fp.close()

    pathname = EasyDialogs.AskFileForOpen(message="Where is MacErrors.h?")

    if pathname:

        fp = open(pathname)

        parse_errors_h(fp, dict)

        fp.close()

    pathname = EasyDialogs.AskFileForOpen(message="Where is mkestrres-MacErrors.h?")

    if pathname:

        fp = open(pathname)

        parse_errors_h(fp, dict)

        fp.close()

    if not dict:

        return

    pathname = EasyDialogs.AskFileForSave(message="Resource output file?", savedFileName="errors.rsrc")

    if pathname:

        writeestr(fss, dict)

    pathname = EasyDialogs.AskFileForSave(message="Python output file?", savedFileName="macerrors.py")

    if pathname:

        fp = open(pathname, "w")

        writepython(fp, dict)

        fp.close()

        fss.SetCreatorType('Pyth', 'TEXT')

    pathname = EasyDialogs.AskFileForSave(message="Text output file?", savedFileName="errors.txt")

    if pathname:

        fp = open(pathname, "w")

        k = dict.keys()

        k.sort()

        for i in k:

            fp.write("%d\t%s\t%s\n"%(i, dict[i][1], dict[i][0]))

        fp.close()

if __name__ == '__main__':

    main()