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Editing File: /usr/share/tools/xml2lst

#!/usr/bin/python3

# xml2lst - convert Discover 2 XML files back to Discover 1 format

import sys
import optparse
import string
import re
import xml.sax
import xml.sax.handler

recognized_data_paths = { "linux/module/name": "%s",
                          "xfree86/server/device/driver": "Server:XFree86(%s)",
                          "xfree86/server/name": "Server:%s"
                        }
recognized_precedence = ("xfree86/server/device/driver",
                         "xfree86/server/name", "linux/module/name")

class DeviceHandler(xml.sax.handler.ContentHandler):
    def __init__(self, busclass, vendor, old_busclass_list, versions,
                 explicit_version):
        self.busclasses = busclass
        self.vendors = vendor
        self.old_busclasses = old_busclass_list
        self.versions = versions
        self.explicit_version = explicit_version

self.devices = {}
        for vendor in self.vendors.keys():
            self.devices[vendor] = {}

self.clearDevice()

def clearDevice(self):
        self.current_device = None
        self.current_device_items = {}
        self.data_path = []
        self.data_version = None
        self.data_version_node = None
        self.content = ""

def startElement(self, name, attrs):
        if name == 'data':
	    # This code fail to take into account that there might be
	    # several data tags with different version settings.
            if attrs.has_key("version"):
                self.data_version = attrs["version"]
                self.data_version_node = attrs["class"]
            self.data_path.append(attrs["class"])
        elif name == 'device':
            self.clearDevice()
            self.current_device = attrs.copy()

def endElement(self, name):
        if name == 'data':
            data_key = string.join(self.data_path, "/")
            if not self.current_device_items.has_key(data_key):
                self.current_device_items[data_key] = []
            if len(self.content) > 0:
                self.current_device_items[data_key].append((self.content.strip(),
                                                            self.data_version))
                self.content = ""

old_class = self.data_path.pop()
            if old_class == self.data_version_node:
                self.data_version = None
                self.data_version_node = None
        elif name == 'device':
            self.saveDevice()
            self.clearDevice()

def characters(self, content):
        if len(self.data_path) < 1 or \
           not re.search(r'\S+', content):
            return

self.content += content

def saveDevice(self):
        item = {}
	if self.current_device.has_key("subvendor"):
	    return # discover 1 do not understand subvendors, ignore entry
        vendor_model_id = self.current_device["vendor"] + self.current_device["model"]
        if self.current_device.has_key("busclass"):
            item["busclass"] = self.busclasses[self.current_device["busclass"]]
        elif self.old_busclasses.has_key(vendor_model_id):
            item["busclass"] = self.old_busclasses[vendor_model_id][0]
        else:
            item["busclass"] = "unknown"
        item["name"] = self.current_device["model_name"]

if self.old_busclasses.has_key(vendor_model_id):
            item["driver"] = self.old_busclasses[vendor_model_id][1]
        else:
            item["driver"] = "unknown"

found = False
        for key in recognized_precedence:
            if not self.current_device_items.has_key(key):
                continue

for (content, version) in self.current_device_items[key]:
                if self.explicit_version and version is None:
                    continue
                if self.versions.has_key(key) and \
                   version is not None and \
                   not version_in_set(version, self.versions[key]):
                    continue
                item["driver"] = recognized_data_paths[key] % (content,)
                found = True
                break
            if found:
                break

vendor = self.current_device["vendor"]
        model = self.current_device["model"]
        self.devices[vendor][model] = item

def version_compare(ver1, ver2):
    """Return negative if the second version is bigger, positive if the
    first version is bigger, or zero if the versions are equal."""

if ver1 == ver2:
        return 0
    elif ver1 == "inf":
        return 1
    elif ver2 == "inf":
        return -1

ver1_parts = map(lambda x: int(x), string.split(ver1, "."))
    ver2_parts = map(lambda x: int(x), string.split(ver2, "."))
    ver1_len = len(ver1_parts)
    ver2_len = len(ver2_parts)

if ver1_len > ver2_len:
        compare_len = ver2_len
    else:
        compare_len = ver1_len

for i in range(0, compare_len):
        if ver1_parts[i] != ver2_parts[i]:
            return ver1_parts[i] - ver2_parts[i]

return ver1_len - ver2_len

def version_in_set(set, version):
    (low_version, high_version) = re.split(r",\s*", set[1:-1], 1)
    low_inclusive = set[0] == "["
    high_inclusive = set[-1] == "]"

low_comp = version_compare(low_version, version)
    if low_comp > 0 or (low_comp == 0 and not low_inclusive):
        return False

high_comp = version_compare(version, high_version)
    if high_comp > 0 or (high_comp == 0 and not high_inclusive):
        return False

return True

def load_id_db(infile):
    class IdHandler(xml.sax.handler.ContentHandler):
        def __init__(self):
            self.idmap = {}

def startElement(self, name, attrs):
            if len(filter(lambda x: x not in ('id', 'name'),
                          attrs.keys())) == 0:
                self.idmap[attrs['id']] = attrs['name']

def getResults(self):
            return self.idmap

handler = IdHandler()
    xml.sax.parse(infile, handler)
    return handler.getResults()

def main():
    usage = "usage: %prog [options] busclass_file vendor_file device_file"
    cmdline = optparse.OptionParser(usage)
    cmdline.add_option("-o", dest="output_fn", metavar="FILE",
                       help="file to write instead of stdout")
    cmdline.add_option("--previous-file", dest="input_fn", default=None,
                       metavar="FILE",
                       help="previous lst file to base updates on")
    cmdline.add_option("--data-version", dest="data_versions", action="append",
                       default=[], metavar="path:version",
                       help="limit output for path to version")
    cmdline.add_option("--explicit-version", dest="explicit_version",
                       action="store_true", default=False,
                       help="skip data missing version info")
    (options, args) = cmdline.parse_args()
    (busclass_fn, vendor_fn, device_fn) = args

old_busclasses = {}
    old_vendors = []
    if options.input_fn:
        input_file = open(options.input_fn)
        for line in input_file:
            if line[0] not in string.whitespace:
                (id, rest) = string.split(line, None, 1)
                old_vendors.append(id)
            else:
                (id, busclass, module, rest) = \
                     string.split(string.lstrip(line), None, 3)
                if busclass == "unknown":
                    continue
                old_busclasses[id] = (busclass, module)

input_file.close()

if options.output_fn:
        output_file = open(options.output_fn, "w")
    else:
        output_file = sys.stdout

version_dict = {}
    if options.data_versions:
        for optstr in options.data_versions:
            (path, ver) = string.split(optstr, ":", 1)
            version_dict[path] = ver

busclasses = load_id_db(busclass_fn)
    vendors = load_id_db(vendor_fn)

parser = DeviceHandler(busclasses, vendors, old_busclasses, version_dict,
                           options.explicit_version)
    xml.sax.parse(device_fn, parser)

vendor_ids = vendors.keys()
    vendor_ids.sort()
    for vendor in vendor_ids:
        device_ids = parser.devices[vendor].keys()
        if len(device_ids) < 1:
            if vendor not in old_vendors:
                continue

result_unicode = "%s %s\n" % (vendor, vendors[vendor])
        output_file.write(result_unicode.encode("iso-8859-1"))

device_ids.sort()
        for device in device_ids:
	    vendor_out = vendor
	    device_out = device
	    if 'default' == device:
		vendor_out = 'ffff'
		device_out = 'ffff'
            result_unicode = "\t%s%s\t%s\t%s\t%s\n" \
                             % (vendor_out, device_out,
                                parser.devices[vendor][device]["busclass"],
                                parser.devices[vendor][device]["driver"],
                                parser.devices[vendor][device]["name"])
            output_file.write(result_unicode.encode("iso-8859-1"))

if __name__ == "__main__":
    main()

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