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  • Committer: John Arbash Meinel
  • Date: 2009-10-02 02:21:12 UTC
  • mto: (4679.6.1 2.1-export-c-api)
  • mto: This revision was merged to the branch mainline in revision 4735.
  • Revision ID: john@arbash-meinel.com-20091002022112-w4ispnaes2t78pty
A quick note about how I'd *like* to do things.

Basically, if I could procedurally declare my API, then all of the boilerplate
could be easily generated from that. However, it needs to be 'static' in a C
header file, and to get that you'd have to generate it from some other source
or have a *lot* more voodoo in your C pre-processor code. Shame that C sucks so
much. Note that Pyrex gets this right, where doing all the boilerplate amounts
to adding 'api' to your definition. Aka
    cdef api object myfunc(int foo)
Is enough to generate all the boilerplate C headers, etc you would need.
It is unfortunate I can't really use that here, because I want a pure C class
to avoid the python garbage collector.

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tools/riodemo.py
 
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# \subsection{Example usage}
 
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# 
 
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# \textbf{XXX:} Move these to object serialization code. 
 
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def write_revision(writer, revision):
 
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    s = Stanza(revision=revision.revision_id,
 
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               committer=revision.committer, 
 
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               timezone=long(revision.timezone),
 
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               timestamp=long(revision.timestamp),
 
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               inventory_sha1=revision.inventory_sha1,
 
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               message=revision.message)
 
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    for parent_id in revision.parent_ids:
 
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        s.add('parent', parent_id)
 
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    for prop_name, prop_value in revision.properties.items():
 
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        s.add(prop_name, prop_value)
 
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    writer.write_stanza(s)
 
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def write_inventory(writer, inventory):
 
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    s = Stanza(inventory_version=7)
 
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    writer.write_stanza(s)
 
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    for path, ie in inventory.iter_entries():
 
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        s = Stanza()
 
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        s.add(ie.kind, ie.file_id)
 
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        for attr in ['name', 'parent_id', 'revision', \
 
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                     'text_sha1', 'text_size', 'executable', \
 
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                     'symlink_target', \
 
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                     ]:
 
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            attr_val = getattr(ie, attr, None)
 
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            if attr == 'executable' and attr_val == 0:
 
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                continue
 
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            if attr == 'parent_id' and attr_val == 'TREE_ROOT':
 
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                continue
 
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            if attr_val is not None:
 
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                s.add(attr, attr_val)
 
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        writer.write_stanza(s)
 
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def read_inventory(inv_file):
 
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    """Read inventory object from rio formatted inventory file"""
 
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    from bzrlib.inventory import Inventory, InventoryFile
 
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    s = read_stanza(inv_file)
 
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    assert s['inventory_version'] == 7
 
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    inv = Inventory()
 
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    for s in read_stanzas(inv_file):
 
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        kind, file_id = s.items[0]
 
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        parent_id = None
 
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        if 'parent_id' in s:
 
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            parent_id = s['parent_id']
 
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        if kind == 'file':
 
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            ie = InventoryFile(file_id, s['name'], parent_id)
 
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            ie.text_sha1 = s['text_sha1']
 
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            ie.text_size = s['text_size']
 
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        else:
 
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            raise NotImplementedError()
 
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        inv.add(ie)
 
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    return inv