comparison mercurial/pure/parsers.py @ 47142:4292bed8da7c

revlog: make the index always return the same tuple

It is simpler to manage the diferrence in on disk format in the internal index
code itself and lets the rest of the code always handle the same object.

This will become even more important when the data we store will be entirely
different (for example the changelog does not need the "linkrev" field.

We start with item reading, we will deal with item writing in the next
changesets.

Differential Revision: https://phab.mercurial-scm.org/D10568

47141:ac72eee94035

    # Size of a C unsigned long long int, platform independent
    big_int_size = struct.calcsize(b'>Q')
    # Size of a C long int, platform independent
    int_size = struct.calcsize(b'>i')
    # An empty index entry, used as a default value to be overridden, or nullrev
    null_item = (0, 0, 0, -1, -1, -1, -1, sha1nodeconstants.nullid)

    @util.propertycache
    def entry_size(self):
        return self.index_format.size

        if i >= self._lgt:
            data = self._extra[i - self._lgt]
        else:
            index = self._calculate_index(i)
            data = self._data[index : index + self.entry_size]
        r = self.index_format.unpack(data)
        if self._lgt and i == 0:
            r = (offset_type(0, gettype(r[0])),) + r[1:]
        return r

    def pack_header(self, header):
        """pack header information as binary"""
        v_fmt = revlog_constants.INDEX_HEADER
        return v_fmt.pack(header)

    def entry_binary(self, rev):
        """return the raw binary string representing a revision"""
        entry = self[rev]
        p = revlog_constants.INDEX_ENTRY_V1.pack(*entry)
        if rev == 0:
            p = p[revlog_constants.INDEX_HEADER.size :]
        return p

    return cls(data, inline), (0, data)


class Index2Mixin(object):
    index_format = revlog_constants.INDEX_ENTRY_V2
    null_item = (0, 0, 0, -1, -1, -1, -1, sha1nodeconstants.nullid, 0, 0)

    def replace_sidedata_info(
        self, i, sidedata_offset, sidedata_length, offset_flags
    ):
        """

            new = offset_flags + old[8:64] + packed + old[64 + packed_size :]
            self._extra[i - self._lgt] = new
        else:
            msg = b"cannot rewrite entries outside of this transaction"
            raise KeyError(msg)

    def entry_binary(self, rev):
        """return the raw binary string representing a revision"""
        entry = self[rev]
        p = revlog_constants.INDEX_ENTRY_V2.pack(*entry)

47142:4292bed8da7c

    # Size of a C unsigned long long int, platform independent
    big_int_size = struct.calcsize(b'>Q')
    # Size of a C long int, platform independent
    int_size = struct.calcsize(b'>i')
    # An empty index entry, used as a default value to be overridden, or nullrev
    null_item = (0, 0, 0, -1, -1, -1, -1, sha1nodeconstants.nullid, 0, 0)

    @util.propertycache
    def entry_size(self):
        return self.index_format.size

        if i >= self._lgt:
            data = self._extra[i - self._lgt]
        else:
            index = self._calculate_index(i)
            data = self._data[index : index + self.entry_size]
        r = self._unpack_entry(data)
        if self._lgt and i == 0:
            r = (offset_type(0, gettype(r[0])),) + r[1:]
        return r

    def _unpack_entry(self, data):
        r = self.index_format.unpack(data)
        r = r + (0, 0)
        return r

    def pack_header(self, header):
        """pack header information as binary"""
        v_fmt = revlog_constants.INDEX_HEADER
        return v_fmt.pack(header)

    def entry_binary(self, rev):
        """return the raw binary string representing a revision"""
        entry = self[rev]
        p = revlog_constants.INDEX_ENTRY_V1.pack(*entry[:8])
        if rev == 0:
            p = p[revlog_constants.INDEX_HEADER.size :]
        return p

    return cls(data, inline), (0, data)


class Index2Mixin(object):
    index_format = revlog_constants.INDEX_ENTRY_V2

    def replace_sidedata_info(
        self, i, sidedata_offset, sidedata_length, offset_flags
    ):
        """

            new = offset_flags + old[8:64] + packed + old[64 + packed_size :]
            self._extra[i - self._lgt] = new
        else:
            msg = b"cannot rewrite entries outside of this transaction"
            raise KeyError(msg)

    def _unpack_entry(self, data):
        return self.index_format.unpack(data)

    def entry_binary(self, rev):
        """return the raw binary string representing a revision"""
        entry = self[rev]
        p = revlog_constants.INDEX_ENTRY_V2.pack(*entry)