How to use the hachoir.core.text_handler.hexadecimal function in hachoir

def createFields(self):
        iff_start = self.absolute_address
        yield String(self, "endian", 2, "Endian ('II' or 'MM')", charset="ASCII")
        if self["endian"].value == "II":
            self.endian = LITTLE_ENDIAN
        else:
            self.endian = BIG_ENDIAN

        yield UInt16(self, "version", "TIFF version number")
        yield UInt32(self, "img_dir_ofs", "Next image directory offset")

        yield String(self, "cr_identifier", 2, "Canon Raw marker", charset="ASCII")
        yield UInt8(self, "cr_major_version", "Canon Raw major version number")
        yield UInt8(self, "cr_minor_version", "Canon Raw minor version number")

        yield textHandler(UInt32(self, "cr_raw_ifd_offset", "Offset to Raw IFD"), hexadecimal)

        offsets = [(self['img_dir_ofs'].value, 'ifd[]', IFD)]

        while offsets:
            offset, name, klass = offsets.pop(0)
            self.seekByte(offset + iff_start // 8, relative=False)
            ifd = klass(self, name, iff_start)

            yield ifd
            for entry in ifd.array('entry'):
                tag = entry['tag'].value
                if tag in IFD_TAGS:
                    name, klass = IFD_TAGS[tag]
                    offsets.append((ifd.getEntryValues(entry)[
                                   0].value, name + '[]', klass))
            if ifd['next'].value != 0:

def createFields(self):
        yield textHandler(Bits(self, "blockheader", 48, "Block header"), hexadecimal)
        if self["blockheader"].value != 0x314159265359:  # pi
            raise ParserError("Invalid block header!")
        yield textHandler(UInt32(self, "crc32", "CRC32 for this block"), hexadecimal)
        yield Bit(self, "randomized", "Is this block randomized?")
        yield Bits(self, "orig_bwt_pointer", 24, "Starting pointer into BWT after untransform")
        yield GenericVector(self, "huffman_used_map", 16, Bit, 'block_used', "Bitmap showing which blocks (representing 16 literals each) are in use")
        symbols_used = []
        for index, block_used in enumerate(self["huffman_used_map"].array('block_used')):
            if block_used.value:
                start_index = index * 16
                field = Bzip2Bitmap(self, "huffman_used_bitmap[%i]" % index, 16, start_index, "Bitmap for block %i (literals %i to %i) showing which symbols are in use" % (
                    index, start_index, start_index + 15))
                yield field
                for i, used in enumerate(field):
                    if used.value:
                        symbols_used.append(start_index + i)
        yield Bits(self, "huffman_groups", 3, "Number of different Huffman tables in use")
        yield Bits(self, "selectors_used", 15, "Number of times the Huffman tables are switched")
        yield Bzip2Selectors(self, "selectors_list", self["huffman_groups"].value)

def parseFontHeader(self):
    yield UInt16(self, "maj_ver", "Major version")
    yield UInt16(self, "min_ver", "Minor version")
    yield UInt16(self, "font_maj_ver", "Font major version")
    yield UInt16(self, "font_min_ver", "Font minor version")
    yield textHandler(UInt32(self, "checksum"), hexadecimal)
    yield Bytes(self, "magic", 4, r"Magic string (\x5F\x0F\x3C\xF5)")
    if self["magic"].value != b"\x5F\x0F\x3C\xF5":
        raise ParserError("TTF: invalid magic of font header")

    # Flags
    yield Bit(self, "y0", "Baseline at y=0")
    yield Bit(self, "x0", "Left sidebearing point at x=0")
    yield Bit(self, "instr_point", "Instructions may depend on point size")
    yield Bit(self, "ppem", "Force PPEM to integer values for all")
    yield Bit(self, "instr_width", "Instructions may alter advance width")
    yield Bit(self, "vertical", "e laid out vertically?")
    yield PaddingBits(self, "reserved[]", 1)
    yield Bit(self, "linguistic", "Requires layout for correct linguistic rendering?")
    yield Bit(self, "gx", "Metamorphosis effects?")
    yield Bit(self, "strong", "Contains strong right-to-left glyphs?")
    yield Bit(self, "indic", "contains Indic-style rearrangement effects?")

def createFields(self):
        yield textHandler(UInt32(self, "plugin_id1"), hexadecimal)
        yield textHandler(UInt32(self, "plugin_id2"), hexadecimal)
        yield UInt32(self, "input_routing")
        yield UInt32(self, "output_routing")
        yield GenericVector(self, "routing_info", 4, UInt32, "reserved")
        yield String(self, "name", 32, strip='\0')
        yield String(self, "dll_name", 64, desc="Original DLL name", strip='\0')

def avInfoHeader(s):
    yield filesizeHandler(UInt16(s, "total_size", "Total block size"))
    yield UInt8(s, "version", "Version needed to decompress", handler=hexadecimal)
    yield UInt8(s, "method", "Compression method", handler=hexadecimal)
    yield UInt8(s, "av_version", "Version for AV", handler=hexadecimal)
    yield UInt32(s, "av_crc", "AV info CRC32", handler=hexadecimal)

yield String(self, "name", 8)
        yield BiosParameterBlock(self, "bios", "BIOS parameters")

        yield textHandler(UInt8(self, "physical_drive", "(0x80)"), hexadecimal)
        yield NullBytes(self, "current_head", 1)
        yield textHandler(UInt8(self, "ext_boot_sig", "Extended boot signature (0x80)"), hexadecimal)
        yield NullBytes(self, "unused", 1)

        yield UInt64(self, "nb_sectors")
        yield UInt64(self, "mft_cluster", "Cluster location of MFT data")
        yield UInt64(self, "mftmirr_cluster", "Cluster location of copy of MFT")
        yield UInt8(self, "cluster_per_mft", "MFT record size in clusters")
        yield NullBytes(self, "reserved[]", 3)
        yield UInt8(self, "cluster_per_index", "Index block size in clusters")
        yield NullBytes(self, "reserved[]", 3)
        yield textHandler(UInt64(self, "serial_number"), hexadecimal)
        yield textHandler(UInt32(self, "checksum", "Boot sector checksum"), hexadecimal)
        yield Bytes(self, "boot_code", 426)
        yield Bytes(self, "mbr_magic", 2, r"Master boot record magic number (\x55\xAA)")

def createFields(self):
        yield textHandler(UInt8(self, "header", "Header"), hexadecimal)
        if self["header"].value != 0xFF:
            raise ParserError("JPEG: Invalid chunk header!")
        yield textHandler(UInt8(self, "type", "Type"), hexadecimal)
        tag = self["type"].value
        # D0 - D7 inclusive are the restart markers
        if tag in [self.TAG_SOI, self.TAG_EOI] + list(range(0xD0, 0xD8)):
            return
        yield UInt16(self, "size", "Size")
        size = (self["size"].value - 2)
        if 0 < size:
            if self._parser:
                yield self._parser(self, "content", "Chunk content", size=size * 8)
            else:
                yield RawBytes(self, "data", size, "Data")

def ZipStartCommonFields(self):
    yield ZipVersion(self, "version_needed", "Version needed")
    yield ZipGeneralFlags(self, "flags", "General purpose flag")
    yield Enum(UInt16(self, "compression", "Compression method"),
               COMPRESSION_METHOD)
    yield TimeDateMSDOS32(self, "last_mod", "Last modification file time")
    yield textHandler(UInt32(self, "crc32", "CRC-32"), hexadecimal)
    yield UInt32(self, "compressed_size", "Compressed size")
    yield UInt32(self, "uncompressed_size", "Uncompressed size")
    yield UInt16(self, "filename_length", "Filename length")
    yield UInt16(self, "extra_length", "Extra fields length")

yield textHandler(UInt32(self, "entry_point", "Address (RVA) of the code entry point"), hexadecimal)
        yield textHandler(UInt32(self, "base_code", "Base (RVA) of code"), hexadecimal)
        yield textHandler(UInt32(self, "base_data", "Base (RVA) of data"), hexadecimal)
        yield textHandler(UInt32(self, "image_base", "Image base (RVA)"), hexadecimal)
        yield filesizeHandler(UInt32(self, "sect_align", "Section alignment"))
        yield filesizeHandler(UInt32(self, "file_align", "File alignment"))
        yield UInt16(self, "maj_os_ver", "Major OS version")
        yield UInt16(self, "min_os_ver", "Minor OS version")
        yield UInt16(self, "maj_img_ver", "Major image version")
        yield UInt16(self, "min_img_ver", "Minor image version")
        yield UInt16(self, "maj_subsys_ver", "Major subsystem version")
        yield UInt16(self, "min_subsys_ver", "Minor subsystem version")
        yield NullBytes(self, "reserved", 4)
        yield filesizeHandler(UInt32(self, "size_img", "Size of image"))
        yield filesizeHandler(UInt32(self, "size_hdr", "Size of headers"))
        yield textHandler(UInt32(self, "checksum"), hexadecimal)
        yield Enum(UInt16(self, "subsystem"), self.SUBSYSTEM_NAME)
        yield UInt16(self, "dll_flags")
        yield filesizeHandler(UInt32(self, "size_stack_reserve"))
        yield filesizeHandler(UInt32(self, "size_stack_commit"))
        yield filesizeHandler(UInt32(self, "size_heap_reserve"))
        yield filesizeHandler(UInt32(self, "size_heap_commit"))
        yield UInt32(self, "loader_flags")
        yield UInt32(self, "nb_directory", "Number of RVA and sizes")
        for index in range(self["nb_directory"].value):
            try:
                name = self.DIRECTORY_NAME[index]
            except KeyError:
                name = "data_dir[%u]" % index
            yield DataDirectory(self, name)

def createFields(self):
        self.resetHandles()

        yield textHandler(UInt16(self, "magic", "Java serialized object signature"),
                          hexadecimal)
        yield UInt16(self, "version", "Stream version")

        while not self.eof:
            yield SerializedContent(self, "object[]")